Electric power metering system

FIELD: metering equipment.

SUBSTANCE: system can be used for registration, metering and payment of consumed electric power by different users. System has recording unit being common for all users which unit is placed in power service stations, metering unit located at any user's place at the point where the unit is connected to network and information chart for any user. Recording unit provides recording of data on paid amount of electric power onto user's information chart. Metering unit provides reading information on paid amount of electric power out of user's information chart as well as permanent comparison of consumed and paid amount of electric power and switches the user from electric circuit in case the paid amount is over.

EFFECT: improved comfort, precision and quality of monitoring of electric power consumption.

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The invention relates to a recording technique and can be used for efficient registration, accounting and payment of the consumed electric energy by subscribers of different types.

There are various devices and systems of registration of electricity used by consumers, for example, by author's certificates and patents: SU # 1647413 A1 "Meter"; SU # 1780022 A1 "Method for monitoring the consumption of electricity; RU №2000577 on the Device to account for the cost of electricity at a variable rate".

Appropriate devices include transducers, meters, switches, points of convergence, decoders and are intended for measuring and recording the power consumption. In case of exceeding the specified operating conditions, the user can be disconnected from the mains supply. General drawbacks are difficulties with the organization of operational control and energy services for the excess paid by the subscriber limit of electricity.

The closest in technical essence of the present invention is the device according to patent RU NO. 2000577 WITH, MKI G 01 R 11/32. This prototype contains the first and second counters, the clock generator block parameter definitions, the pulse Converter and a persistent storage device.

In this protot is PE is the transformation of information about the amount of energy consumed in pulses, the frequency of which is proportional to the energy consumption. One of them is formed of a group of pulses in accordance with the tariff code, which is stored in the ROM. To counter these groups of pulses are added, which allows to extract information about the energy consumption.

The described device does not allow you to perform a number of important currently functions. A variety of types of subscribers that consume electrical energy, causes and diversity requirements on the organization of payment for electric power, control and accounting of consumption. In particular, the known devices do not provide for the payment by the subscriber selected a certain volume limit power, control and metering reach this limit, automatically disconnect the consumer from the power source in the event of a resumption of payment, as well as the organization of power supplied to the subscriber on credit when credit a certain amount.

The present invention is to improve the usability, accuracy and timeliness of monitoring and metering of electricity consumption.

The problem is solved in that the system of accounting of electric energy, containing the first clock generator and the first storage device, executed in the form of a kit including a recording device, information cards and the accounting device, moreover, in the recorder entered the first connector I / o, the first and second memory blocks, the first control unit, a first address generator, the random number generator, the first switch unit set code, the first decoder and the first block of the "exclusive OR", and the output of the first oscillator connected to the clocked inputs of the first memory block, the first address generator and the first control unit, the output unit through the first set of code decoder connected to the input of the first switch, the output of which is connected to the input of the first block "exclusive OR", the random number generator via the second memory block connected to the second input of the first switch and connected in series through the first address generator and the first persistent storage device to the second input of the first block of the "exclusive OR", and its output to the input of the first memory block, the other input of the first control unit is connected to a trigger input of a recording device, and outputs the first control unit - with control inputs of the first address generator, the first switch, the first and second memory blocks, a clock input and the input of the recording/erasing of the first connector of the I / o information the input of which is connected to the output of the first memory block, the information card introduced the third memory block and the second I / o connector you the ode, moreover, a clock input, erase/write, information input and input reading of the third memory block connected to respective outputs of the second connector I / o in the device accounting entered the third connector I / o, second and third control units, fourth, fifth and sixth memory blocks, the second clock generator, the second and third address generators, the second block is exclusive-OR, second, and third permanent storage device, the block comparison, a reversible counter, a second decoder, the indicator of the paid amount, the control unit, the indicator is off, the second switch and the unit of measurement, thus the output of the second oscillator connected to the clocked inputs of the second and third control units, fourth, fifth, and sixth memory blocks, the second and third address generators and block comparison, the output of the fourth memory block through the fifth memory block is connected to the input of the second block is exclusive-OR, and its output connected in series through sixth memory block, the third permanent storage device, a reversible counter and a second decoder to the input of the indicator of the paid amount, the output of the second address generator is connected to another input of the fifth memory block, and the output of the third address generator through the second persistent storage device to another input of the second the th block of the "exclusive OR", another output of the sixth memory block is connected to the input unit of comparison, and its output to one of the inputs of the third control unit and one of the inputs of the third address generator, the other end of which is connected to another input of the third control unit and to the input of the indicator is off, the input of the second control unit connected to the output of the third connector I / o, and outputs the second control unit to the control inputs of the third control unit and the fourth memory block, and also to the clock input and the input of the reading of the third connector I / o outputs the third control unit connected to control inputs of the fourth the fifth and sixth blocks of the memory block comparison, the second and third address generators and a reversible counter, and with the input of the recording/erasing of the third connector I / o, and its information output to the other input of the fourth memory block, the input control unit connected to the output of the reversible counter and the output to the control input of the second switch and to another input of the indicator is off, the input of the second switch is plugged in, and its output through the unit of measurement - to the consumer, the information output unit is connected with another input of the reversible counter, and control output unit dimensions with other controller input of the reversible counter.

The implementation of the accounting system of electrical energy in the form of a recording device, an information card and metering devices will improve the convenience, accuracy and efficiency of control and metering of electrical energy.

Figure 1 shows the block diagram of the recording device.

Figure 2 presents a structural diagram of an information card.

Figure 3 presents the block diagram of the metering devices.

4 shows a variant of the structural implementation of the random number generator.

Figure 5 and 6 shows structural variants of realization of the unit of measurement.

Figure 7 shows graphs illustrating the operation of the system.

Figure 1 is indicated: the information card 1, the first connector I / o 2, the first memory unit 3, the second memory unit 4, the first clock generator 5, the first control unit 6, the first persistent storage device 7, the first address generator 8, the random number generator 9, the first switch 10, the block set code 11, the first decoder 12, the first block exclusive OR 13.

Figure 2 illustrates: a third memory block 14 and the second connector I / o 15.

Figure 3 indicated: third connector I / o 16, 17 second and third 18 control units, 19 fourth, fifth, 20 and 21 sixth memory blocks, the second clock generator 22, 23 second and third 24 generators addresses, the second block exclusive OR 25, 26 second the third 27 permanent storage device, the Comparer 28, reversible counter 29, the second decoder 30, the indicator of the paid volume 31, the control unit 32, the off indicator 33, the second switch 34, the measurement unit 35, the block identification card 36.

Figure 4 marked: decoder 37, a clock generator 38 and the counter 39.

Figure 5 illustrates: the voltage meter 40, the current meter 41, the first 42 and second 43 analog-to-digital converters, a multiplier 44, the account generator 45, the generator reads 46, adder 47.

Figure 6 indicated: Electromechanical sensor 48, the shaper 49, a persistent storage device 50.

In the graphs illustrating the operation of the system (7)are: part (of length M bits of the reference code sequence 51, previous audit and information groups; control code group 52 (length L1bit); information code group 53 (length L2bit); the remaining part of the reference code sequence 54 (length M-M-L1-L2bits).

Figure 1 information card 1 is inserted in the first slot I / o 2. The oscillator 5 is connected to the inputs of the first memory block 3, the first control unit 6 and the first address generator 8. To the first control unit 6 connected to the trigger input, and outputs the first control unit 6 is connected to the inputs of the first memory block 3, the first address generator 8, is which memory block 4 and the first switch 10, and with the first connector I / o 2. Block set code 11 via the bus, consisting of several parallel wires that are connected to the input of the first decoder 12, and its output to the first switch 10. The random number generator 9 through the second memory unit 4 is connected to the first switch 10 and connected in series through the first generator memory 8, the first storage device 7, the first block is exclusive-OR 13 with the first memory block 3.

The output of the first switch 10 is connected to the input of the first block exclusive OR 13, and the output of the first memory unit 3 to the first connector I / o 2.

In figure 2 the third memory block 14 is connected with the second connector input / output 15.

Figure 3 the third input / output 16 is connected to the inputs of the second control unit 17, the fourth memory unit 19, the input of the reversible counter 29, and outputs the second 17 and third 18 control units. The second clock generator 22 is connected to the second inputs 17, 18 third control units, the fourth inputs 19, 20 fifth and sixth 21 memory blocks, the second 23 and 24 third generators addresses, and the input unit of comparison 28. The outputs of the second control unit 17 is connected to the input of the fourth memory block 19 and the third control unit 18, and outputs to the inputs of the fourth 19, 20 fifth and sixth 21 memory blocks, the second 23 and 24 third generators addresses, ISO input unit 28 comparison. To the inputs of the fifth memory block 20 is connected to the outputs of the fourth memory block 19 and the second address generator 23, and the output of the fifth memory block 20 through the second block exclusive OR 25 and the sixth memory block 21 is connected to the input of the third permanent storage device 27. The output of the sixth memory block 21 is connected to the input of the block comparison 28, and its outputs with the inputs of the third control unit 18, the third address generator 24, its output through the second persistent storage device 26 with the input of the second block exclusive OR 25.

The inputs of the reversible counter 29 is connected to the outputs of the third permanent storage device 27, the measurement unit 35, and the output of the reversible counter 29 is connected to the input of the control unit 32 and through the second decoder 30 is paid to the indicator of volume 31. The output control unit 32 is connected with the indicator off 33 and the second switch 34, which is also connected to power supply and measurement unit 35, the output of which is connected to the electricity consumer. One of the outputs of the third address generator 24 is also connected to the inputs of the third control unit 18 and the indicator off 33.

Figure 4 the oscillator 38 through the counter 39 is connected to the decoder 37.

Figure 5 the grid via a current meter 41 and the voltage meter 40 is connected to the electricity consumer. Victimservices current 41 and a voltage meter 40 through 43 accordingly, the second and the first 42 analog-to-digital converters connected to the input of the multiplier 44, the output of which is connected to the input of the adder 47, the other of its inputs connected to the outputs of the generator records 45 and generator readout 46.

Figure 6 Electromechanical sensor 48 via the imaging unit 49 is connected with a permanent storage device 50.

Blocks all devices work as follows.

In the recording device (1) of the first connector I / o 2 is used to supply information on map 1 signals clock synchronization (clock); signal controlling the recording information on the information card and erasing recorded information; the signal into a serial binary code writes information to map the coded symbols to prevent unpaid electricity usage and identification cards, as well as containing information on the amount paid by the subscriber once again amount of electricity.

The first memory block 3 is used for storing recorded in parallel code code words (containing encoding symbols information), convert it into a serial code and feed it through the first connector I / o 2 on the information card 1. Work unit synchronizes a clock generator 5, the operation mode is determined by the first control unit 6. Parallel binary code is supplied with the first block exclusive OR 13.

The second block pamyati is to write a random number, generated by the random number generator 9. A random number of several bits in parallel code is written to this memory block according to the control signal of the first control unit 6 at the time of arrival of the control signal and is stored in the memory block until the next point of arrival of the control signal.

The first clock generator 5 generates the clock pulses controlling and synchronizing the operation of the first control unit 6, the first memory block 3 and the first address generator 8.

The first persistent storage device 7 contains the reference code sequence of random numbers, grouped by groups, such as bytes. Bytes are written to addresses with sequentially increasing numbers, starting with zero. Its output is extracted in a parallel binary word of a certain length (1 byte). The address of this byte is set in the parallel code, the first address generator 8.

The random number generator 9 is continuously generating random multi-bit (e.g., 8 bits) random numbers.

The first switch 10 connects to your multi-output multi-bit (e.g. 8 bit) binary signal from one of his two multichannel inputs. Which of the inputs connected to the output, is determined by the control signal of the first control unit .

Block set code 11 is used to enter in the device information entered by the subscriber sum of money and, consequently, about the paid amount of electricity. After making subscribers the operator (cashier) in the energy service enters certain information in this block set code 11, an appropriate amount of money (the block can be implemented, for example, in the form of a key node). The first decoder 12 converts the information received from block set code 11 in the corresponding parallel binary code.

The first block is exclusive-OR 13 performs a logical operation on two multi-bit binary words received at its two inputs. The number of digits of both words are the same. The operation is performed separately with each pair of bits, standing in the same position. (This is taken one bit from the first position of the two signals, above them is this logical operation, and the result is placed in the first position of the output multi-bit words. Simultaneously, take bits from the second position of the two input signals, and the result of their logical processing is placed in the second position of the output signal, and so on).

If x1- one bit of the signal and x2another signal, after performing the exclusive OR operation, and its result is determined by the formula:

The first control unit 6 generates the signals that control the operation of other units. On the first connector I / o 2 signal that controls the recording of information in the information map, and the signal with a certain number of clock pulses for synchronization of this process. On the first 3 and second 4 memory blocks and the first address generator 8 and the first switch 10 signals that control their operation.

In the information map (figure 2) on the third memory block 14 from the second connector 15 signals that control its operation and transferring coded information either in the memory block (when the card is connected to the recording device), or from memory block (if the card is connected to the accounting device).

Each cell of the memory block stores one bit. In the absence of clock pulses to the memory unit 14 stores the previously recorded information.

With the advent of his synchroscope clock unit is activated. The operation mode is determined by the control signals at the inputs of read and write. When the control potential at the input of the recording of the previous information of the memory block is erased, and with the advent of each new clock pulse begins bitwise write binary characters in the cell, starting with zero addresses sequentially with increasing cell numbers. With the disappearance manage the potential at the input record and clock pulses, the recording stops, and the unit goes into storage mode. The recorded binary symbols served with connector 15 to the information input of the memory block. When the control potential at the input record and the absence of clock pulses is only erase all previously recorded information.

With the advent of the control potential at the input of the reading and with the arrival of the clock mode is activated and starts reading bit reading recorded in the memory block of binary symbols.

The characters arrive at the I / o connector output 15 from the same information inputs of the memory block. When reading recorded in the memory block information is not damaged and remains in the block. The reading begins with a zero cell address and is performed sequentially in ascending order of the number of memory cells. With the loss of control potential and each renewal of its submission read each time starts again from the cell with a zero address.

In the device accounting (3) a third connector I / o 16 connects with the second connector I / o 15 information card. In addition, when the card is inserted into the connector 16 to the second control unit 17 sends the signal that the card is inserted and you can read the information.

The second control unit 17 serves to organize reading information from the card account. With ethically it generates clock and control signals, supplied to the third input / output 16, and a fourth memory block 19.

Upon completion of the reading he control signal informs the third control unit 18 and passes control to further the work of the accounting devices.

The third control unit 18 generates the control signals for the fourth 19, 20 fifth and sixth 21 memory blocks, the second 23 and 24 third generators addresses, and block comparison 28.

In case of successful reading information from the card to authenticate the third control unit 18 also produces an information signal to the reversible counter 29 about the need for reading the processed data, and the signal on the third input / output 16 and further information on the card, erase it with the previously recorded information.

The fourth memory unit 19 reads from the third connector I / o set of binary bits in the serial code and stores it. Further according to the signal of the third control unit into the parallel code generates groups of characters (for example, 8 bits form a byte).

The fifth memory unit 20 writes the bytes to addresses that are located sequentially, starting with zero addresses, guided by the control signal from the third control unit 18.

A third control unit 18 switches the fifth memory block mode scity the project, the output of the fifth memory block serves bytes written to addresses, a binary number which is determined by the multi-channel signal from the second address generator 23.

The sixth memory unit 21 writes a binary code group (e.g., bytes)received on its multi-channel input from the second block exclusive OR 25. The recording is done in groups (bytes) in the cell, starting with zero addresses group command from the third control unit 18. In each cell is written to one group (byte), additionally, the information recorded in cells pre-defined rooms, is constantly supplied constantly on the third storage device 27 and the block 28 comparison.

The second clock generator 22 generates clock pulses for synchronizing the operation of other blocks.

The second address generator 23 by a driving signal from the control unit starts at their outputs to produce a binary code, starting from scratch, which is the number of cells, which in the fifth memory block 20 is read in bytes.

When the interruption control signal and then feed it again output the binary code of the second address generator 23 to begin again from scratch, no matter what room he managed to count from the previous cycle.

The third address generator 24 by a driving signal from the third block in the management 24 begins to produce binary code, consistently growing from a seed. In the first cycle is the initial number is zero. In the case of receipt of a control pulse from the Comparer 28 following the initial number when run from the control unit in the next cycle will be the one. In the next (third) cycle when the arrival of the control pulse with unit 28 comparison of the initial number will be equal to two, etc. Thus, when coming from the block comparison of control pulses, with each new managing pulse in a cycle, the beginning of the generated numeric sequence will constantly increase. (For example, a third address generator 24 each time it is necessary to call a group a length of 5 bytes. Then in the first cycle will be generated sequence number of cells that calls into bytes with: 0-1-2-3-4; in the second cycle will be generated sequence position numbers 1-2-3-4-5; in the third cycle 2-3-4-5-6, etc).

If the third address generator 24 at a constant bozilova increasing number of the first byte of the code group will exhaust all memory of the second persistent storage device 26, it produces a control signal which is fed to the third control unit 18 and the off indicator 33.

The appearance of this control signal indicates either an error reading the information is Noah cards or damage of recorded data on it, or try to use a fake card. In this case, the third control unit 18 stops the operation of the device, which may again be resumed by re-inserting the card in the third connector I / o 16, the entire process will repeat itself.

The second block is exclusive-OR 25 calculates the logical function “exclusive OR” of two multibit binary input signals (similar to the operation unit 13). The operation is performed in parallel with each pair of bits, standing in the same places. The result is entered into the same category.

The second persistent storage device 26 contains a reference code sequence representing a random binary numbers, grouped by bytes. Bytes written permanently into cells with increasing numbers, starting with zero. The output of the storage device is one byte, the address of the cell which arrives at the moment in the form of a binary code from the third address generator 24.

The third permanent storage device 27 contains information about the different amount of payment, encrypted code, defined by the first decoder 12.

Each option code complies with its payment. This code is fed to the multichannel input of the storage device is TBA 27 with certain cells of the sixth memory block 21. As a result, the output of the storage device 27 is fed the amount of the payment corresponding to this code.

The Comparer 28 compares numbers written in certain cells of the sixth memory block 21. The comparison starts after completing a certain number of cells. In case of discrepancy between the numbers recorded in these cells (which indicates the defect of reading), the block comparison produces a control signal.

Reversible counter 29 adds the number coming from the third permanent storage device 27 with the existing counter and subtracts already have number number received from the measurement unit 35. The addition mode set control signal from the third control unit 18, the subtraction mode set control signal from the measurement unit 35. In the case of their simultaneous receipt of the control signal of the addition takes precedence.

The second decoder 30 converts the binary code from the outputs of the reversible counter 29 in code that manipulates digital display paid volume 31.

The indicator of the paid volume 31 displays the amount paid to date amount of electricity (for example, in kilowatt-hours).

The control unit 32 continuously compares the current value of the paid amount with a certain threshold. If it falls below the threshold, it generates switching off the surrounding voltage to the second switch 2.

The threshold can be either zero or some negative number if the credit form of payment.

Off indicator 33 produces a certain kind of optical or acoustic signal (or both together) in the case of exhaustion of payment, and the signal of another type on error reading information card.

The second switch 34 turns off the power grid from the consumer (subscriber) in the case of receipt by him tripping voltage control unit 32.

The measurement unit 35 is continuously measures the current power consumption of the network by the subscriber, summarizes it for some period of time and periodically in the form of digital code delivers the thus obtained value consumed during this period of electrical energy to the reversible counter 29. (The period may be, for example, 1 hour; 0.1 hours, and so on).

All blocks and nodes that define the identity card and produce information from it, United in a block identification card 36.

In a variant of the structural implementation of the random number generator 9 (figure 4) decoder 37 converts the code at the output of the counter 39 in the code required for subsequent blocks.

The clock generator 38 operates continuously and produces clock pulses to the binary counter 39.

The binary counter 39 on parallel output produces increased the non-binary code. Upon completion of the counter code of cyclically takes a value of zero. Since the time of the request number from the decoder 37 is random and depends on the moment you start recording device (i.e. the start of the first control unit 6), and the frequency of the clock generator 38 is chosen large enough, we obtain from the decoder 37 number of fairly random.

In a variant of the structural realization of the measurement unit 35 (5) the voltage meter 40 and the current meter 41 to produce signals proportional to the voltage in the electric current consumed by the subscriber.

The first 42 and second 43 analog-to-digital converters convert the input analog signals from the measuring current and voltage in binary digital code.

The multiplier 44 performs continuous digital multiplication of the input multi-bit binary signals.

Digital adder 47 carries out periodic summation coming from multiplier 44 code with a previously fixed number. The frequency summation is determined by the clock pulses from generator records 45 (this periodicity can be pre-set to, for example: 0.1 s; 1 s; 10 s; and so on, depending on the expected rate of change of load from the consumer). After a certain period of recorded information representing the amount of electricity consumed by the subscriber is and this period, deducted in the reversible counter 29 of the previously paid amount of electricity.

These periods are set by the pulses produced by the generator erase 46. (Their frequency may be equal to, for example, 1 hour). Simultaneously with the transfer of information from the adder 47 to reversible counter 29 is reset the adder 47 and all information out of him erased.

In another embodiment, the structural implementation of the measurement unit 35 (6) Electromechanical sensor 48 sends a signal after the consumption of a certain portion of electricity (for example, household electricity, this portion is determined by one rotation of the disk).

In the shaper 49 this signal is converted into a pulse of a certain type.

In the ROM 50 is continuously recorded digital code portion of the electric power corresponding to a single revolution of the disk Electromechanical transducer 48.

This code pulses to the reversible counter.

The principle of operation of the system of accounting of electric energy is as follows.

In normal operation the system is operated by one common for all subscribers of the recording device located in the energy services, and one accounting device located at each customer of the subscriber where it is connected in the outlet. Each subscriber has its own information card is.

Each subscriber periodically pays the energy service a certain amount of power according to your needs and the current tariff. After payment of the operator-cashier writes the information to map the subscriber information about the paid amount of electricity in a certain way encrypted, as well as a set of code symbols, which prevents the attempt counterfeit cards or self-registering subscriber information about the payment.

After that, the subscriber places the information card in own accounting device installed in the place of consumption. The amount paid amount is read from the card to the device memory of the account and added to the remaining available amount paid. It also checks the correctness of the reading, authenticity card and recorded on her information.

In case of discrepancy codes an error message reading error. In this case, when the correct card, the subscriber must remove it from the connector in the device accounting and paste again. In case of counterfeit cards, the caller must insert the correct map.

As the power consumption amount paid fixed volume is steadily decreasing. Her balance is constantly displayed for inspection by the subscriber. If the subscriber has exhausted all paid amount, devices, the control automatically disables it from the electrical outlet, feeding at certain light (sound) signal. In the case of credit form of payment disconnection of the subscriber is performed after the exhaustion of the loan.

When the subscriber will again pay some amount of electricity put it in the map information and transfer it to your device account, it will re-connect the caller to an electrical outlet.

The implementation of these consolidated operations is as follows.

All binary signals are grouped for the device in the code group on 8-bit (bytes), although any other number of bits in the group.

In the first 7 and second 26 permanent storage device is pre-registered the same for both devices reference code sequence consisting of n bytes (N=8n bits). For example, let its length will be equal to 256 bytes (possible other value). Each byte represents a random number obtained in advance or random number generator, or taken when programming from a table of random numbers.

The length of the information code groups that carry information about the amount paid during the last visit of power service to the amount of electricity equal to l2bytes (L2=812 bit).

Length control code group used for verification of the information card in the unit of account equal to the l1bytes (L1=811bit). Length l1 and l 2make up some fraction of n (l1+l2)<n.

And the code and the information code groups are formed from the reference code sequence. All bytes of the reference code sequence numbered (first number = 0).

In the recording device selects a number m, which is a certain number of bytes from the reference code sequence.

When forming the control group are selected l1consecutive bytes from the reference code sequence, starting with byte number m (m is also a byte, since the total number of reference bytes is 88=256).

Then each byte of the group of bytes of length l1selected from the reference sequence are combined by a logical exclusive OR operation with the same byte m.

Combining each byte is made by bits in the same positions (the first bit of the byte m with the first bit of the byte of the reference sequence, the second with the second, and so on). Received bits - the results of the logical operations are inserted in the same position.

Similarly handled all the selected source l1bytes of the reference sequence, forming a new control code group length l1bytes.

For formation of the information code groups are used l2 byte reference code sequence located immediately after the l1the bytes forming the control code group. All these l2bytes also combined by the exclusive OR operation with some other eight-bit binary number K (=one byte).

Received two code groups with a total length of l=l1+l2bytes in bit serial code stored in the memory card information.

When you place the card in the device accounting record information bit is read, and generates in memory devices of the same General code group length l=l1+l2bytes.

In the device of the account initially and constantly entered the same reference code sequence, as in the recorder.

Next is the authentication information. Because the unit of account it is unknown what part of the reference code sequence generated by the burner control and information code groups, i.e. the unknown value of m, it is the definition by searching. Here we use the following property of the logical exclusive OR operation.

Let x - a-bit code sequence at a particular position, be a binary variable. bosnack through y=x+a=x vx- the merger of binary variables x and and exclusive OR operation.

Applied again to the variable from the exclusive OR operation with a bit x and get a new variable z, i.e. z = x + y.

Then

z=x(xva)v(xva)=x(x·a)vxva=

=x[(va)·(xv)]va=x(xvaxvva)va=

=x(axv)va=xx avxva=xava=

(xv)a=a.

(Using the properties of x=and=0;=Thus, reuse of the exclusive OR operation again restores the original binary variable.

Therefore, if received from an information card control code group to join in the accounting device on this logical operation with the bytes stored in the second constant storage unit 26 of the reference code sequence starting with m, the resulting l1the same binary numbers of bytes, each of which is equal to m. This is due to the fact that the device records the same l1bytes the same reference sequence under the same logical operation with the same number m.

If the control code group to combine with any other segment of the reference code sequence (also of length l1), you will never get the l1the same bytes.

This is used to verify the card. Adopted in the device control code group initially bit is exclusive OR operation with a part of the reference code sequence of length l1starting with byte zero addresses. If the resulting bytes are not equal, then compare the portion of the reference sequence is shifted, i.e. the processing starts with the byte nom is R 1. If the newly obtained distinguished bytes, the processing is performed at the byte number 2, and so on

Thus, the control sequence of “moves” to a reference sequence until you reach the place, where, after the logical processing of all bytes will be the same. This is the number m, which was recorded in the recorder.

If necessary increase the secrecy obtained by the logical operation value of m may optionally be controlled by the number of the first byte region of the reference sequence, where he began to satisfy the condition of equality of all l1received after the logical operation of bytes. If there is no such need, the recording device does not necessarily selected for formation of the control group region of the reference code sequence to logically handle it with the number m of its first byte. Enough all l1of bytes to process with any other eight-bit binary number (but the same for all bytes of the field!).

If the "move" control group along the reference sequence has reached the byte number n-l1-l2the condition of the equality of all bytes of the logical operation is not met, it means that the information card is defective (the causes of which may be different). The control unit indicates that et is m, further analysis is terminated until the next space map in the device.

If the displacement of the control group along the reference sequence, the correct position is found, this means that the following l2bytes of the reference sequence are allowed to use to decrypt the information enclosed in the information code group. Decryption is similar, combining bit logical exclusive OR of the bytes with corresponding numbers from the reference code sequence and received information code group.

The result is a l2bytes, each of which is equal to the number recorded in the recording device. This number indicates how much electricity paid by the subscriber and is used in further processing.

If you want to perform additional authentication card (information as of a few bytes) may also be tested for the equality of all To that obtained by the logical operation, all of the information bytes. If there is no such need, the information group can only consist of one byte (i.e. l2=1).

After identification card and calculations To both the code group information from memory card are erased.

On the basis of the obtained To calculate the number this is added to the available size of the paid amount.

The described principle of blocks is this:

The random number generator 9 generates the number m. It is memorized in the second memory unit 4. The first decoder 12 forms a number K. the First address generator 8 sequentially retrieves from the reference code sequence recorded in the first constant storage unit 7, l1+l2bytes that begin with m. The first l1of them are processed by the logical operation “exclusive OR” in the first block 13 with the number m. Subsequent l2bytes are processed in the same block 13 with the number as the Switch with the number m number is in the first switch 10.

Both the emerging code of the group is accumulated in the first memory block 3 and after the formation of sequential code through the first connector I / o 2 serves information on map 1.

In the device accounting unit identification card 36 through the third connector I / o 16 is performed in sequential code reading both code groups, and in the fourth memory block 19 bits are grouped into bytes, which are further processed in parallel code.

After the formation of the two code groups are migrated to the fifth memory block 20. Further, there is a simultaneous serial you the options of bytes from the fifth memory block 20 and the second persistent storage device 26. Address extracted bytes are produced in the first 23 and second 24 generators addresses. The generator 23 generates addresses starting from zero, with each new launch. The starting address generated by the generator 24 in the first cycle, is also equal to zero. In each of the next cycle (when “failed” previous cycles) starting address is incremented. The signal that the cycle is “bad”, i.e. the control group was formed not from those bytes of the reference sequence, which in this cycle jointly processed, served by the Comparer 28. He compares the values of bytes written in the sixth memory block 21, which has consistently recorded the results of the logical processing of the bytes of the new group and the reference sequence in this loop.

If the card is identified, the corresponding cell of the sixth memory unit 21 retrieves the value of K.

If you want to pass information more than made in one byte, you can use multiple data bytes, each of which entered his number: K1, K2, K3, etc.

The number is the code that retrieves from the third permanent storage device 27 information about paid this time the volume of electricity.

The signal from the third control unit 18 allows the reversible counter 29 to summarize this in the guise paid to the remaining volume.

The amount paid amount is continuously displayed on the display of the paid amount 31.

The principle of operation of the unit by figure 5 is that the samples of the digital measurement of the current consumed power combined with a sufficiently high frequency, forming in the adder 47 the amount of energy consumed. This stored value is read in the reversible counter 29 through equal intervals of time determined by the generator readout 46. Read the values in the General case, every time you can, of course, have different values, which is determined by the current load level.

The unit of measurement 6 in the reversible counter 29 is read always the same value, and the current load level is reflected in the time intervals between readings and is determined by the current speed of the Electromechanical transducer 48.

Using the system unit identification card 36 ensure the privacy and security of information transmission and prevents the use of counterfeit cards.

The application of electric power metering can improve the convenience, accuracy and efficiency of control and accounting of electric power consumption by users of different types, to organize in the present form of payment energy required in each subscriber volume.

The system records the electrical energy, containing the first clock generator and the first persistent storage device, characterized in that it is made in the form of a kit including a recording device, the information card and the unit of accounting, and in the recorder entered the first connector I / o, the first and second memory blocks, the first control unit, a first address generator, the random number generator, the first switch unit set code, the first decoder and the first block of the “exclusive OR”, and the output of the first oscillator connected to the clocked inputs of the first memory block, the first address generator and the first control unit, the output unit dialing through the first decoder connected to the input of the first switch, the output of which is connected to the input of the first block “exclusive OR”, the random number generator via a second memory unit connected to the second input of the first switch and connected in series through the first address generator and the first persistent storage device to the second input of the first block of the “exclusive OR”, and its output to the input of the first memory block, the other input of the first control unit is connected to a trigger input of a recording device, and outputs the first control unit - with control inputs of the first address generator, the first switch, the first and second blocks of memory, so the new entry and exit erase/write the first connector I / o information the input of which is connected to the output of the first memory block, the information card entered the third memory block and the second connector I / o, and clock input, recording/erasing of information input and input reading of the third memory block connected to respective outputs of the second connector I / o in the device accounting entered the third connector I / o, second and third control units, fourth, fifth and sixth memory blocks, the second clock generator, the second and third address generators, the second block is exclusive-OR, second, and third permanent storage device, the block comparison, reversible counter, a second decoder, the indicator of the paid amount, the control unit, the indicator is off, the second switch and the unit of measurement, while the output of the second oscillator connected to the clocked inputs of the second and third control units, fourth, fifth, and sixth memory blocks, the second and third address generators and block comparison, the output of the fourth memory block through the fifth memory block is connected to the input of the second block is exclusive-OR, and its output connected in series through sixth memory block, the third permanent storage device, a reversible counter and a second decoder to the input of the indicator of the paid amount the output of the second address generator is connected to another input of the fifth memory block, and the output of the third address generator through the second persistent storage device to another input of the second block is exclusive-OR, the other output of the sixth memory block is connected to the input unit of comparison, and its output to one of the inputs of the third control unit and one of the inputs of the third address generator, the other end of which is connected to another input of the third control unit and to the input of the indicator is off, the input of the second control unit connected to the output of the third connector I / o, and outputs the second control unit to the control inputs of the third control unit and the fourth memory block, and to clock input and output reading of the third connector I / o outputs the third control unit connected to control inputs of the fourth, fifth, and sixth memory blocks, the block comparison, the second and third address generators and a reversible counter, and with the input of the recording/erasing of the third connector I / o, and its information output to the other input of the fourth memory block, the input control unit connected to the output of the reversible counter and the output to the control input of the second switch and to another input of the indicator is off, the input of the second switch is plugged in, and its output through unit of measurement - to the consumer, the information output unit of measurement soy is inen with another input of the reversible counter, and control output of the measurement unit with another managing input of reversible counter.



 

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