Multi-adapter analog i / o

 

(57) Abstract:

The invention relates to automation and computer engineering and can be used in systems collect and process information and control system for receiving signals from analog sensors and outputting analog signals in the form of absolute values of voltage, relative values of voltage, as well as in the form of a sine-cosine signals. The technical result of the invention is to improve the accuracy of the transformation and resiliency. The device includes a controller external interface trunk information exchange, four amplifier, analog-to-digital Converter, m d / a converters, a microprocessor control unit, analog-to-digital Converter, the control device d / a converters, four keys enable the test mode, the four multiplexer, m keys, the driver of the reference voltage, the synchronization unit, the internal parallel interface trunk information exchange, internal serial interface trunk information exchange. 1 Il.

The invention relates to automatic control and computer engineering and the can is in from analog sensors and outputting analog signals in the form of absolute values of voltage, the relative values of voltage, as well as in the form of a sine-cosine signals.

A device for interfacing the computer with TV links [1] containing the switch input channels, the conversion unit sequential code in parallel, the bus information bus device, the transceiver unit of currency, a clock generator, a block of output amplifiers (shapers), the memory block of microinstructions, arithmetical-logical unit, the mode register, the decoder microinstructions and block handshake exchange.

Known multi-channel device for I / o analog information [2], which is the closest to the proposed. The device contains switches from the first to the fourth inverter, a block of memory d / a Converter, amplifier, comparator interface unit (controller external interface trunk information exchange), arithmetical-logical unit, the register and the multiplier. Thus the inputs of the first switch are analog inputs of the device, the outputs of the first switch is connected with the first and second inputs of the second switch, the first and second outputs of which are connected respectively with the first and second inputs of the third and fourth of the switches, the outputs of the fourth switch is connected to information inputs of the memory block, the outputs of which are analog outputs of the device, the first output of the third switch connected to the first input digital to analogue Converter, the output of which is connected to the input of the amplifier, the output of which is connected to the comparator input and the third input of the second switch, the fourth input which is the input reference voltage device, the first group of input-output interface block is an information input-output device, the second group of inputs-outputs of the interface block is an input-output management device.

The outputs of the microinstructions of the control unit is connected to information inputs arithmetical-logical unit, the group of outputs of the control unit connected to the control inputs arithmetical-logical unit, a group of control inputs of the connection unit and the information inputs of the register, the output control unit connected to the control inputs of the register and the interface block, the outputs of the signs arithmetical-logical unit and a comparator output connected to inputs of the indication control unit, an information input-output arithmetical-logical unit is connected to the second switch and to the inputs of the group digital to analogue Converter, the first output register is connected with the control input of the second switch, the second and third outputs of the register are connected respectively to the inputs of a read / write multiplier, the outputs of the first group of register connected to the address inputs of the memory block, the outputs of the second register are connected to the address inputs of the multiplier, the second output of the third switch is connected to the second input of the digital to analogue Converter.

The disadvantages of the known devices are not accurate conversion, and lack of tolerance.

The objective of the invention is to improve the accuracy of the transformation and resiliency.

The invention consists in that a multi-adapter analog I / o, containing digital to analogue Converter, the external controller interface trunk information exchange, the first amplifier further comprises an analog-to-digital Converter, m-1 digital to analogue converters, where m is an integer greater than or equal to four, the microprocessor, the control unit analog-to-digital Converter, the control device d / a converters, a second amplifier, the third usilitel is th key to activate the test mode, the fourth key to activate the test mode, the first multiplexer, the second multiplexer, the third multiplexer, the fourth multiplexer, m keys, the driver of the reference voltage, the synchronization unit, the internal parallel interface trunk information exchange, internal serial interface trunk information exchange.

At this interface the inputs and outputs of the microprocessor, controls the analog-digital Converter, the control device d / a converters, interface the output of the analog-to-digital Converter connected with the first input-output controller external interface trunk information exchange using the internal parallel interface trunk information exchange, the first output control analog-to-digital Converter connected to the signal input of the gate is the beginning of conversion, analog-to-digital Converter, the second output control analog-to-digital Converter connected to the input of the signal selection circuits, analog-to-digital Converter, the third output control analog-to-digital Converter connected to the WMO what OBRAZOVATEL connected to the output of the busy signal analog-to-digital Converter.

The outputs of the first, second, third and fourth keys enable test mode through the first, second, third and fourth amplifiers connected respectively to the first, second, third and fourth inputs of the analog-to-digital Converter, the first inputs of the first, second, third and fourth keys enable the test mode are connected to the outputs respectively of the first, second, third and fourth multiplexers, the second input of the first key turn on the test mode is connected to the first output driver reference voltage, the second input of the third key to activate the test mode is connected with the third output driver reference voltage, the second inputs of the second and fourth keys enable the test mode is connected with a point of zero potential, the control inputs of the first, second, third and fourth keys enable the test mode is connected to the fourth output control analog-to-digital Converter.

The control inputs of the first, second, third and fourth multiplexers are connected to the fifth output control analog-to-digital Converter, the inputs of the first and second multiplexers are analog inputs. from the first to the nth, the input of the fourth multiplexer connected to respective outputs of the digital-to-analogue converters with (n+1) th to m-th first output driver reference voltage is connected to the first input keys of the first through m-th, the third output driver reference voltage is connected to the second inputs of the keys from the first to the m-th second output driver reference voltage is connected to the point with zero potential.

The key outputs from the first to the m-th connected to inputs of the reference voltage corresponding digital-to-analogue converters with first through m-th, the outputs of which are the outputs of the analog signals from the first through m-th control inputs of keys from the first to the m-th and the control inputs of digital to analog converters with first through m-th connected to respective outputs of the control device d / a converters, the first input device control analog-to-digital Converter and input synchronization control unit digital to analog converters connected to the output of the synchronization unit, the inlet of which is the input AC voltage, the front-end inputs to analog converters with first through m-th connected using internally the highway information sharing microprocessor, the second input-output controller external interface trunk information exchange is the input-output external interface system railroad information exchange.

The invention is illustrated by the drawing, which shows:

1 - analog-to-digital Converter;

21the first d / a Converter;

2m- m-th d / a Converter;

3 - microprocessor;

4 controller external interface trunk information exchange;

5 - the control unit analog-to-digital Converter;

6 - device control digital-to-analogue converters;

7 - the first amplifier;

8 - the second amplifier;

9 - the third amplifier;

10 - the fourth amplifier;

11 - the first key to activate the test mode;

12 - the second key to activate the test mode;

13 is the third key to activate the test mode;

14 - the fourth key to activate the test mode;

15 - the first multiplexer;

16 - the second multiplexer;

17 - the third multiplexer;

18 - the fourth multiplexer;

191- the first key;

19m- m-th key;

20 - driver reference voltage;

21 is block the morning serial interface trunk information exchange;

24 - input-output external interface system railroad information exchange;

25 input AC voltage;

261the first analog signal;

26m- m-th analog signal.

Multi-adapter analog I / o has m-1 d / a converters 22,..., 2mwhere m is an integer greater than or equal to four, the controller 4 external interface trunk information exchange, the first amplifier 7, an analog-to-digital Converter 1, the microprocessor 3, the device 5 controls the analog-digital Converter, the control device 6 d / a converters, the second amplifier 8, the third amplifier 9, the fourth amplifier 10, the first key 11 entering the test mode, the second key 12 entering the test mode, the third key 13 entering the test mode, the fourth key 14 entering the test mode, the first multiplexer 15, the second multiplexer 16, the third multiplexer 17, the fourth multiplexer 18, m keys 191,..., 19mthe driver 20 of the reference voltage, the synchronization block 21, the internal parallel interface line 22 information exchange, internal serial interfacultaire 5 control analog-to-digital Converter, device 6 control d / a converters, interface output (S) analog-to-digital Converter 1 are connected with the first input-output controller 4 external interface trunk information exchange using the internal parallel interface line 22 information exchange.

The first output device 5 controls the analog-digital Converter connected to the signal input of the gate is the beginning of transformation (ST) analog-to-digital Converter 1, the second output device 5 controls the analog-digital Converter connected to the input of the chip select (CS) analog-to-digital Converter 1, the third output device 5 controls the analog-digital Converter connected to the signal input of the read (RD) analog-to-digital Converter 1, the second input device 5 controls the analog-digital Converter connected to the output of the busy signal (BS) analog-to-digital Converter 1.

The outputs of the first, second, third and fourth keys 11, 12, 13 and 14 enable the test mode through the first, second, third and fourth amplifiers 7, 8, 9 and 10 are connected respectively to the first, second, third and fourth inputs of the analog-to-4 activate the test mode are connected to the outputs respectively of the first, second, third and fourth multiplexers 15, 16, 17 and 18, the second input of the first key 11 enable test mode is connected to the first output of the driver 20 of the reference voltage, the second input of the third key 13 entering the test mode is connected with the third output of the shaper 20 reference voltage, the second outputs of the second and fourth keys 12 and 14 enable the test mode is connected with a point of zero potential.

Control inputs (U) first, second, third and fourth keys 11, 12, 13 and 14 enable the test mode is connected to the fourth output device 5 controls the analog-digital Converter, the control inputs of the first, second, third and fourth multiplexers 15, 16, 17 and 18 are connected to the fifth output device 5 controls the analog-digital Converter.

The inputs of the first and second multiplexers 15 and 16 are input analog signals.

The inputs of the third multiplexer 17 is connected with the corresponding outputs of digital to analog converters 1, ..., 2nfrom the first to the n-th, where 1<n<m. The input of the fourth multiplexer 18 is connected with the corresponding outputs of digital to analog converters 2n+1,..., 2mwith (n+1) th to m-..., 19mfirst to m-th, the third output of the shaper 20 reference voltage is connected to the second inputs of the keys 191,..., 19mfrom the first to the m-th second output of the driver 20 of the reference voltage is connected to the point with zero potential.

The outputs of the keys 191, ..., 19mfrom the first to the m-th connected to inputs (OD) of the reference voltage corresponding to analog converters1,..., 2mfirst to m-th, the outputs of which are the outputs 261,..., 26manalog signals from the first through m-th.

Control inputs (U) key 191,..., 19mfrom the first to the m-th and control inputs (U) d / a converters 21,..., 2mfrom the first to the m-th connected to respective outputs of the device 6 control d / a converters.

The first input device 5 controls the analog-digital Converter and the input (S) synchronization device 6 control digital to analog converters connected to the output of the synchronization block 21, the inlet of which is the entrance 25 of alternating voltage.

Interface inputs And d / a converters 21,..., 2mfrom the first to the m-th connected with nterfaces line information exchange microprocessor 3.

The second input-output controller 4 external interface trunk information exchange is the entrance-exit 24 external interface system railroad information exchange.

Multi-adapter analog I / o provides the reception and output of analog signals in the form of an absolute voltage ratio of the voltage on the two inputs (outputs) and sine-cosine signal as two signals (signal proportional to the sine of the transmitted value, and the signal proportional to the cosine of the transmitted values).

For receiving analog signals used by analog-to-digital Converter 1. Analog-to-digital Converter 1 is channel and provides temporary storage device, the multiplexer, the actual analog-to-digital Converter and registers for storing conversion results. Control analog-to-digital Converter 1 is performed by using signals of the gate is the beginning of transformation (ST), signal chip select (CS) signal, a read (RD). On its output, analog-to-digital Converter 1 outputs a signal (BS) employment, as well as issues on your front-end output the results of the transformations, which is the generation of control signals by the analog-digital Converter 1, signal controls the first, second, third and fourth keys 11, 12, 13 and 14 enable test mode and forming a channel number for first, second, third and fourth multiplexers 15, 16, 17 and 18 and for receiving a busy signal from the analog-to-digital Converter 1 and the synchronization signal from the synchronization block 21 serves as the device 5 controls the analog-digital Converter.

It contains the address decoder, the input and output registers. The outputs of the respective bits of the output register form first, second, third, fourth and fifth outputs of the analog-to-digital Converter 1. The inputs of the respective bits of the input register form first and second inputs of the device 5 controls the analog-digital Converter. Access to the input and output registers of the device 5 controls the analog-digital Converter is carried out by internal parallel interface line 22 information exchange via the interface input (And) device 5 controls the analog-digital Converter.

The first, second, third and fourth amplifiers 7, 8, 9 and 10 are used for converting the levels of the incoming analog signals when filing these with the ut to be implemented on the basis of precision operational amplifiers.

The first, second, third and fourth keys 11, 12, 13 and 14 enable the test mode allow you to apply to the inputs of analog-to-digital Converter 1 or analog signals from outputs of the first, second, third and fourth multiplexers 15, 16, 17 and 18, or test signals, which are signals generated by the imaging unit 20 of the reference voltage positive reference voltage negative reference voltage), and zero potential.

Each of the multiplexers 15, 16, 17 and 18 can be connected to the first inputs of each of the keys 11, 12, 13 and 14 enable the test mode, one of its inputs (one analog input signals of a multichannel adapter analog I / o).

For the generation of control signals by the d / a converters 21, . . ., 2mfrom the first to the m-th and control signals keys 191,..., 19mfirst to m-th, and for receiving the synchronization signal from the synchronization block 21 serves as the control device 6 d / a converters, which contains the address decoder, the input and output registers. The outputs of the respective bits of the output register device 6 control ciproandetohbuywithoutpresc discharge input device register 6 control d / a converters is a synchronization input (S) of the device 6 control d / a converters. Access to the input and output registers of the device 6 control digital to analog converters is internal parallel interface line 22 information exchange via the interface input (And) device 6 control d / a converters.

The keys 191, . . . , 19mfrom the first to the m-th can be connected to the inputs of the reference voltage (OD) of each digital-to-analogue converters1,..., 2mfrom the first to the m-th or the first output of the driver 20 of the reference voltage or the third output (to file either a positive reference voltage or a negative reference voltage).

Write data to d / a converters 21,..., 2mfrom the first to the m-th produced by the microprocessor 3 via internal serial interface line 23 information exchange. Setting new values on the outputs of digital to analog converters 21, ..., 2mfrom the first to the m-th and, therefore, the outputs 261,..., 26manalog signals from the first to the m-th is due upon receipt of the signal at the control input (U) d / a converters 21,..., 2mfirst to m-th.

what, I can pay tithing on m-th signals and provide control of serviceability of analog communication lines, connecting the outputs of digital to analog converters 21,..., 2mfrom the first to the m-th consumer analog signals (in particular, to control the state of a short circuit in analog communications lines), the inputs of the third multiplexer 17 is connected with the corresponding outputs of digital to analog converters 21,..., 2nfrom the first to the nth, the input of the fourth multiplexer 18 is connected with the corresponding outputs of digital to analog converters 2n+1,..., 2mwith (n+1) th to m-th.

The synchronization block 21 serves to signal the reference frequency of the supply voltage on-Board network (400 Hz) used to power the sensors, using sine-cosine signals.

The imaging unit 20 of the reference voltage is used for forming the positive (+UOP) and negative (-UOP) reference voltages, determining the output range of the analog signals generated by the d / a converters 21, . . ., 2mfirst to m-th, and used multi-adapter analog I / o test mode to calibrate the analog-to-digital Converter 1.

The microprocessor 3 serve data the resulting analog-to-digital conversion, and data processing for digital to analog conversion.

Input-output 24 external interface system railroad information exchange is used for connecting a multichannel adapter analog I / o to interface the system railroad information exchange computing system using this multi-adapter analog I / o. Communication with devices of the computing system is performed by the controller 4 external interface system railroad information exchange.

Multi-adapter analog I / o works as follows.

After power up and run by the microprocessor 3 of the self test, the microprocessor 3 starts receiving data from the analog-to-digital Converter 1 and the data output to d / a converters 21,..., 2mfirst to m-th.

Receiving analog signals as follows. The device 5 controls the analog-digital Converter under control of the microprocessor 3 generates at its fifth output channel number for first, second, third and fourth of the LEM are set by writing the microprocessor 3 of the corresponding values in the corresponding bits of the output register device 5 controls the analog-digital Converter. Further, the device 5 controls the analog-digital Converter generates at its first output signal to a gate of the beginning of the transformation (ST). The values of the analog signals into first, second, third and fourth inputs of the analog-to-digital Converter 1, are stored in the temporary storage devices analog-to-digital Converter 1. Next, the analog-to-digital Converter 1 converts for all four channels.

The results of the conversion are recorded in the registers of the analog-to-digital Converter 1. About the end of the transformation indicated by the state of the busy signal (BS). This is followed by the reading of the results of transformations from the registers analog-to-digital Converter 1, for which the device 5 controls the analog-digital Converter generates the appropriate signals on their second and third outputs, that is, the signal chip select (CS) signals and read (RD). The results of the transformations consistently for all four channels on the inner parallel line 22 informational exchange received in the microprocessor 3.

Data obtained by analog-to-digital conversion, processed microbrasserie without additional processing are placed in the memory cells of the corresponding channel of the microprocessor 3;

for analog input channel relative values of the voltages of the advanced microprocessor 3 calculates a value that is equal to the ratio of the converted voltage signal to a reference voltage;

for the input analog sine-cosine channel, the microprocessor 3 calculates the ratio of the converted voltage in the sine channel voltage in the cosine channel and the arctangent function

As sine-cosine signals are AC signals reference frequency 400 Hz, the microprocessor 3 synchronizes the beginning of the analog-to-digital conversion (signal gate start conversion) with a reference frequency supplied to the first input device 5 controls the analog-digital Converter.

The microprocessor 3 running multi-adapter analog I / o test mode (when the first, second, third and fourth keys 11, 12, 13 and 14 enable the test mode provides the supply to the inputs of analog-to-digital Converter 1 positive and negative reference voltage from the driver 20 of the reference voltage, and zero potential) stores the digital values corresponding pological 3 running multi-adapter analog I / o operating mode (when the first, the second, third and fourth keys 11, 12, 13 and 14 enable the test mode provides the supply to the inputs of analog-to-digital Converter 1 analog signals from outputs of the first, second, third and fourth multiplexers 15, 16, 17 and 18) for correction received from the analog-to-digital Converter 1 values.

The calculated values of the microprocessor 3 via the controller 4 external interface trunk information exchange issues in input-output 24 external interface trunk information exchange (in the computing system, using this multi-adapter analog I / o).

The output of analog signals is performed as follows. In the microprocessor 3 from input-output 24 external interface trunk information exchange (from a computer system using this multi-adapter analog I / o) data are received digital to analog converters and data modes multichannel adapter analog I / o.

Electronic computer 3 performs the processing of these data (multiplied by the scale factors, the calculation of signal parameters when issuing signals in VI is Rennie serial interface line 23 information exchange are recorded in digital to analog converters 21,..., 2mfirst to m-th. Further, when the data written in the output register device 6 control d / a converters on the control inputs (U) d / a converters 21,..., 2mfirst to m-th signals are issued, upon receipt of which the conversion is performed, and outputs of digital to analog converters 21, ..., 2mfrom the first to the m-th and, therefore, the outputs 261,..., 26manalog signals from the first to the m-th set new values to analog signals.

When issuing a sine-cosine signals by means of the keys 191,..., 19mfrom the first to the m-th positive and negative reference voltage (+UOPand-UOP) to the inputs of the reference voltage (OP) d / a converters 21,. . . , 2mfrom the first to the m-th served synchronously with the frequency of the on-Board network. At the outputs of digital to analog converters1,..., 2mfirst to m-th signals are formed in the form of a square wave, the amplitude of which is proportional recorded in digital to analog converters 21,..., 2mfrom the first to the m-th values.

The signals from outputs of digital to analog converters 2n+1,..., 2mwith (n+1) th to m-th received on the corresponding input of the fourth multiplexer 18. Analog-to-digital Converter 1 under the control of the microprocessor 3 is converting these signals into digital form. The microprocessor 3 compares the results of transformations of the data, which were transferred to the d / a converters 21, ..., 2mfirst to m-th, and in the case of inconsistency, the microprocessor 3 via the controller 4 external interface trunk information exchange issues in input-output 24 external interface trunk information exchange failure alarms.

Thus, the present invention provides the ability to receive analog signals absolute voltage relative voltage and sine-cosine signals, converting them into digital form with high precision, and conversion of the data in digital form into analog signals absolute voltage relative voltage and sine-cosine signals and the output of the analog signals with better uptime and with minimum use of resources of the computing system using this multi-adapter analogue existing element base, to make it industrially and used in the systems of collecting and processing information, as well as in control systems, which characterizes the present invention as industrially applicable.

Sources of information

1. A. C. the USSR 1532937, CL G 06 F 13/00, 1990.

2. A. C. the USSR 1564606, CL G 06 F 3/00, 1990.

Multi-adapter analog I / o, containing digital to analogue Converter, the external controller interface trunk information exchange, the first amplifier further comprises an analog-to-digital Converter, m-1 digital to analogue converters, where m is an integer greater than or equal to four, the microprocessor, the control unit analog-to-digital Converter, the control device d / a converters, a second amplifier, the third amplifier, the fourth amplifier, the first key to activate the test mode, the second key to activate the test mode, the third key to activate the test mode, the fourth key to activate the test mode, the first multiplexer, the second multiplexer, the third multiplexer, the fourth multiplexer, m keys, the driver of the reference voltage, the synchronization unit, the internal parallel InterfaceName, at this interface the inputs and outputs of the microprocessor, controls the analog-digital Converter, the control device d / a converters, interface the output of the analog-to-digital Converter connected with the first input-output controller external interface trunk information exchange using the internal parallel interface trunk information exchange, the first output control analog-to-digital Converter connected to the signal input of the gate is the beginning of conversion, analog-to-digital Converter, the second output control analog-to-digital Converter connected to the input of the signal selection circuits, analog-to-digital Converter, the third output control analog-to-digital Converter connected to the input read analog-to-digital Converter, the second input device control analog-to-digital Converter coupled to the output of the busy signal analog-to-digital Converter, the outputs of the first, second, third and fourth keys enable test mode through the first, second, third and fourth amplifiers connected respectively with the first, third and fourth keys enable the test mode are connected to the outputs respectively of the first, second, third and fourth multiplexers, the second input of the first key turn on the test mode is connected to the first output driver reference voltage, the second input of the third key to activate the test mode is connected with the third output driver reference voltage, the second inputs of the second and fourth keys enable the test mode is connected with a point of zero potential, the control inputs of the first, second, third and fourth keys enable the test mode is connected to the fourth output control analog-to-digital Converter, the control inputs of the first, second, third and fourth multiplexers are connected to the fifth output control analog-to-digital Converter, the inputs of the first and second multiplexer inputs are analog signals, the inputs of the third multiplexer connected to respective outputs of the digital-to-analogue converters with first through n-th, the input of the fourth multiplexer connected to respective outputs of the digital-to-analogue converters with (n+1) th to m-th first output driver reference voltage is connected to the first input keys of the first through m-th, the third output driver reference n is connected to a point of zero potential, the key outputs from the first to the m-th connected to inputs of the reference voltage corresponding digital-to-analogue converters with first through m-th, the outputs of which are the outputs of the analog signals from the first through m-th control inputs of keys from the first to the m-th and the control inputs of digital to analog converters with first through m-th connected to respective outputs of the control device d / a converters, the first input device control analog-to-digital Converter and input synchronization control unit digital to analog converters connected to the output of the synchronization unit, the inlet of which is the input AC voltage, the front-end inputs to analog converters with first through m-th connected using the internal serial interface trunk information exchange with output serial interface trunk information exchange microprocessor, the second input-output controller external interface trunk information exchange is the input-output external interface system railroad information exchange.

 

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