Device for controlling analog objects

FIELD: measuring equipment.

SUBSTANCE: device has block for forming control and stimulation signals, block for forming standard signals, multiplication blocks, frequency transformer, phase rotator, commutator, frequencies grid generator, integrators, blocks for square involution, adder, normalization block, key, analog-digital converter, comparison circuits, memory blocks, registers, information output block, interval estimation block (for setting lower and upper limits of trust range for each measured value of mutual difference coefficient of distorted and standard signals) and block for analysis of number of support values of mutual difference coefficient (to exclude from further processing results of measurements, for which within limits of trust interval number of support values of coefficient exceeds allowed limit).

EFFECT: higher precision.

2 cl, 2 dwg

 

The invention relates to the field of measurement technology and can be used in systems of automated control and diagnostics of electronic objects.

A device for control of electronic products containing an object of control, switches, measuring the coefficient of mutual differences of the signals, analog-to-digital Converter, unit variance, and estimation of the parameters, the control unit, the key driver of the reference signal, the switch signal, the block of stimulating signals and output unit of the control (see RF patent for the invention №2071107, CL G 05 In 23/02, publ. 27.12 1996, bull. No. 36).

The disadvantage of this device is the low accuracy of estimation of the technical state of the object in the diagnostic process control according to the results of measurement of the complex indicator of the coefficient of mutual differences between the distorted and the reference signals.

The closest to the technical nature of the claimed invention is a device for controlling analog objects containing block for the formation of governors and the stimulating signals, the set of reference signals, blocks the multiplication, frequency Converter, a phase shifter, the switch driver grid frequency, integrators, block squaring, the adder, the power rationing, key, number the about-to-digital Converter, schema comparison, a block of memory registers and the block of output data (see USSR author's certificate No. 1718189, CL G 05 In 23/02, publ. 7.03 1992, bull. No. 9).

The disadvantage of this device is the low accuracy of detection of failure in the test object. This is because due to the impact of various destabilizing factors of the measurement result of the complex index of technical condition of the object (in the form of the coefficient of mutual differences between the distorted and the reference signal) differs from the true value. If the absolute value of the error of the measurement of this indicator exceeds half the distance between the reference values of the specified indicator corresponding to different failures (classes of the technical condition of the object, then the decision will be wrong. However, in the known device is not provided for interval estimation of measurement results analysis of the distances between implementations indicators of the neighbouring classes of the technical condition of the controlled object.

The main task, which directed the inventive device is to increase the recognition accuracy class technical condition of analog objects from diagnostic control.

This technical result is achieved by the fact that in the known device on the I control analog objects have been added to the unit interval estimates (to establish lower and upper bounds of the confidence interval for each of the measured values of the coefficient of mutual differences distorted and reference signals) and the unit of analysis (to exclude from further processing those measurements in which within the confidence interval of the number of reference values exceeds the permitted limit).

Figure 1 presents the structural electrical circuit of the device; figure 2 is a structural circuit diagram of the shaping unit managers and stimulating signals.

Device for controlling analog objects contain unit 1 generation of control and incentive signals, block 2 generate the reference signals, blocks 3 and 4 multiplication Converter 5 frequency, the phase shifter 6, a switch 7, a driver 8 grid frequency, the integrators 9 and 10, the blocks 11 and 12 of the squaring, the adder 13, block 14 of the regulation, the key 15, an analog-to-digital Converter 16, block 17, interval estimates, Shem 181÷18Mthe comparison unit 19 of the memory block 20 analysis of the number of reference values of the coefficient of mutual differences, M registers 211÷21Mand the block 22 of the output.

Unit 1 generating control and stimulating signal contains the 23 "start", shaper 24 Gating pulse shaper 25 stimulatory signals, a counter 26, a multiplier 27 frequency pulse and the element 28 delay.

The device operates as follows.

To begin stimuliruyushie the signal from the corresponding output unit 1 is supplied simultaneously to the inputs of the unit 2 generator of reference signals and the test object (not shown).

Controlled (distorted) signal Sto(t) from the output of the test object (not shown), is fed to the inputs of units 3 and 4 multiplications. From the output of block 2 of the reference signal Se(t) (ideal, i.e. without distortion, with nominal parameter values) through the transducer 5 frequency supplied to the other inputs of unit 3 multiplication directly, and with unit 4 multiplication through the phase shifter 6, which carries out signal processingmated by Hilbert with the reference signal Se(t).

But the second Converter input 5 frequency through the switch 7 from the output of the shaper 8 grid frequency signal of one of the heterodyne frequencies ƒi(where i=1, 2, 3,..., n; n is the number of heterodyne frequencies at the output of the shaper 8). Selection of the desired heterodyne frequency is fed to the first control input of the switch 7 corresponding code combination with the control output of the control unit 1 and the stimulating signals

The results of multiplication of the signals from the outputs of blocks 3 and 4 are received at the first inputs of the integrators 9 and 10, pre-installed in the initial state by a pulse from the installation unit output 1 control and stimulatory signals. After integration over a time equal to the duration t∈[0, T] element of the signal voltage output integrate the ditch 9 and 10 is transmitted through the blocks 11 and 12 squaring to corresponding inputs of the adder 13. From the output of the adder 13 and the result is fed to the first input of the normalizing unit 14, a second input connected to the second output of the unit 2 generator of reference signals. With normalizing unit 14, the signal is sent to an information input key 15, which when it arrives at its gate the input pulses from the corresponding output block 1 is the reference of the measurement of the coefficient of gimutual differences are controlled (distorted) and the reference signals.

The voltage output from the key 15 is applied to the input of analog-to-digital Converter 16, depending on the measured values of giconverted into a corresponding binary code input to the input unit 17 interval estimates. Unit 17 carries out the formation of the lowerand the topvalues of confidence intervalfor each i-th measured value of the coefficient of mutual differences between the distorted and the reference signals respectively to first and second input circuits 181÷18Mcomparison.

To the third inputs of these circuits 181÷18Mcomparison information is filed with the respective outputs of block 19 of the memory of the reference values of the coefficient of mutual differences when the i-th heterodyne frequency corresponding to various a-m failures (classes of the technical condition of the object, where a=1, 2,..., M; M is the number of the recognized failure of the object. If the reference value offalls within the confidence intervalthe output of the corresponding and-th circuit 18andcomparing a signal will appear logical "unit". Otherwise (if the reference value of the correlation coefficientfor the b-th failure of the object will be outside the confidence intervaloutput circuit 18bcomparison will correspond to a logical "zero".

The output of each of the circuits 181÷18Mcompare connected to the corresponding input unit 20 analysis and information input of one of the registers 211÷21M. Unit 20 carries out the analysis of output circuits 181÷18Mcomparison. If a logical "unit" will be present at the output of only one of the circuits 18andcomparison, and outputs of other circuits - logic "zero"signal from the output of block 20 analysis, arriving at the control inputs of the registers 211÷21M, put them in a ready state for recording information from the outputs of the circuits 181÷18Mcomparison. If num is m logical "units" on the outputs of the circuits 18 1÷18Mcomparison exceeds a specific value (in this case, m>1), then the output of block 20 analysis on the control inputs of the registers 211÷21Msignal prohibiting take the information from the outputs of the circuits 181÷18Mcomparison. Thus excluded from further analysis of the results of measurement of the coefficient of mutual differences between the distorted and the reference signal, which can lead to erroneous results in the recognition of the technical condition of the object.

The outputs of the registers 211÷21Mconnected to the information input unit 22 to output information. After carrying out n measurements of the coefficient of mutual differencesc command unit output 1 signal on the control input unit 22 for a survey of the state of the registers 211÷21Mwith intervals determined by the clock pulses from the clock output unit 1 to the input of the synchronization unit 22. Information about the number of the register 21a, which recorded the highest number of logical units, is fed to the output device. It corresponds to the number of a-th failure object (th class technical condition), recognized in the process control object for the integrated indicator of the coefficient of mutual differences are controlled (distorted) and this is ment signals.

The control sequence of elements of the device unit 1 generating control and stimulatory signals (figure 2). When the button 23 start voltage is applied to the input of the shaper 24 Gating pulses which control the operation key 15. In addition, the gate pulses acting on the input of the shaper 25 stimulatory signals, ensuring its control modes of the control object and the imaging unit 2 of the reference signal. The gate pulses from the output of the imaging unit 24 sets the integrators 9 and 10 in the initial state.

The gate pulses from shaper 24 is counted by the counter 26, and the result of counting is supplied to the control input of the switch 7 (to select the desired heterodyne frequency from the grid frequency at the output of the imaging unit 8 for supplying the Converter 5 and the input unit 19 memory (select i-x reference values of the coefficients, i=1, 2,..., n). After calculating the n-th pulse control output of the counter 26 will receive the command signal on the control input unit 22 to output information. The synchronization input unit 22 receives the pulses from the multiplier 27 frequency pulses, is connected through the element 28 of the delay to the first output of the driver 24 and the gate pulses. The time delay element 28 is determined by the duration of the process is found in the device for controlling objects from the time of formation of the impulse unit 24 to the end of the logical units in the corresponding register 21. Off of the driver 24 and the gate pulse signal is output from the counter 26 when the count of the n-th pulse.

Thus, the introduction of the device unit 17 interval estimation and block 20 analysis allows to exclude the results of measurement of the complex index of technical condition of the object, in which the limits of the confidence interval are two or more reference values corresponding to different failures. The availability of data blocks reduces the risk of erroneous decisions and, ultimately, increases OCR accuracy class technical condition of analog objects from diagnostic control.

1. Device for controlling analog objects, containing two blocks of multiplication, the first inputs of which are combined and input devices, two integrator, information inputs are connected to the outputs of the respective multiplier units, two block squaring, the inputs of which are connected to the respective outputs of the integrators, the adder, the inputs of which are connected to the outputs of the respective blocks squaring, the power rationing, the first input of which is connected to the output of the adder, the key information the input of which is connected to the output of the power rationing, analog-to-digital Converter, whose input is connected to the output of the key p is therefore United shaping unit the reference signal and the frequency Converter, the output of which is connected to the second input of the first unit of multiplication and through the phase shifter to the second input of the second block multiplication, M schema comparison, the M registers, information inputs each of which is connected to the outputs of the respective circuits of the comparison, the output unit information the input of which is connected to the outputs of the respective registers, the memory block, the outputs of which are connected to control inputs of the schema comparison, driver grid frequency, the switch information input of which is connected to the outputs of the shaper grid frequency, and the power generation of control and incentive signals stimulating the output of which is connected to the output of the processing unit of the reference signal, the second output of which is connected to the second input of the regulation, control output processing unit managers and stimulating signals connected to the input of the memory block and the control input of the switch, the output of which is connected to a second input of the frequency Converter, the installation exit processing unit managers and stimulating signals connected with the installation of the inputs of the integrators, the gate output unit generating control and stimulus signals is connected with the control input of the key, the command output unit generating control and stimulus signals connected to the panel is engaged by the input block output data, the synchronization input of which is connected to the clock output unit generating control and stimulus signals, and the output unit to output information is output, wherein the inputs of the unit interval estimation and analysis block number reference values of the coefficient of mutual differences, the inputs of which are connected to the outputs of the respective schemes comparison, information inputs which are connected to the outputs of the unit interval estimates, the inlet of which is connected to the output of the analog-to-digital Converter, and the output of the analysis block number reference values of the coefficient of mutual differences connected with control inputs of the registers.

2. The device according to claim 1, characterized in that the shaping unit managers and stimulating signal contains the driver Gating pulse shaper stimulating signals, counter, multiplier frequency pulse and a delay element whose output is connected to the input of the multiplier frequency pulse, the output of which is clocked by the output unit, the first output of the driver gate pulses are connected to the inputs of delay elements and shaper of the stimulating signals to the counting input of the counter and is an installation unit output, the second output of the driver gate output gate output block is a, the information output of the meter is to control the output unit, and the output of the overflow of the counter is connected to the input of the stop gate driver pulse and is a command output unit, the input of the start of the block through the start button is connected to the power bus.



 

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