SU1654855A2 - Adaptive commutator of telemetering system - Google Patents

Abstract

The invention relates to telemetry and can be used in telemechanics, long distance communication and automatic control systems. The aim of the invention is to increase the reliability by forcibly polling low-active channels at certain points in time. The device contains sensors 1, converters 2 approximation errors, keys 3, 4, elements 5, 10, 17, 19, 25, 26, maximum signal detector 6, unit 7 comparison, decoder 8, counters 9, 21, generator 11, triggers 12, 18, 24, readout unit 13, analog-to-digital converter 14, buffer memory unit 15, bl, oxy 16, 23 comparison, permissible error setting bus 20, switch 22, inverter 27, time interval setting device 28, OR element 29 with appropriate communications. 1 il. SS (L from. El Јъ 00 SP SL

Description

31654855

The invention relates to telemetry, can be applied in teleme

Hanike, distance and automatic control systems, and is an improvement to the auth switch. Ev about the number 769589.

The aim of the invention is to increase the reliability by forcibly polling low-active channels at certain points in time,

The drawing shows the structural diagram of the adaptive switch telemetering system

The adaptive switchboard contains in each channel sensors 1, converters 2 approximation errors, first 3 and second 4 keys, first elements AND 5, maximum signal detector 6, comparison unit 7, decoder 8, counter 9, second element 10, generator 11, trigger 12, read block 13, analog-digital converter 14, buffer memory block 15, first additional compare block 16, first additional And 17 element, first additional trigger 18, second additional And 19 element, allowable error bus 20, additional sensor 21, switch 22, second additional comparison unit 23, second additional trigger 24, fourth 25 and fifth 26 additional AND elements, inverter 27, time interval master 28 and OR 2 element

Adaptive switch works as follows

If the output of the setting unit 28 has a zero signal, then at the end of the counting of the previous counting unit, the readout unit 13 outputs an sine element 26 to the zero input of the trigger 12, and a signal 1 appears at its zero output allowing the pulses from the generator 11 to 10, at counter 9.

At the same time, through the switch 22 "and the decoder, the code from the outputs of counter 9 is supplied, since the control input of the switch 22 contains a zero signal from trigger 24. Using the decoder 8, keys 3 and 4 are opened and a voltage is alternately connected to one of the inputs of the comparison unit 7 with converters 2 approximation errors. At the output of the detector 6 maximum signal, the output voltage corresponds to the highest

0

five

0

five

thirty

about the value of the approximation error. If the values of voltages coincide at the inputs of block 7, i, e. When polling the channel with the greatest error, block 7 outputs signal 1 to a single input of trigger 12, to the clock input of which a signal is received from comparator 16, which checks whether the greatest error has reached a predetermined allowable value. If the greatest error has reached a predetermined value, then the valve, which in this case consists of counter 9 and decoder 8, stops on the channel that has this error, is triggered by element OR 29 of analog-to-digital converter 14, the analog signal of the selected sensor is converted into a code and - enters block 13 of reading. Unit 13 converts the parallel parameter code (from converter 14) and the number of the selected channel (from switch 22) into a serial code and transmits it to the communication line. Upon completion of the transmission, block 13 issues a signal through AND 26 to trigger 12, allowing further passage of pulses from generator 11 to counter 9 through AND 10, and polling of keys 3 and 4 continues.

If in several channels the approximation error reached the specified value, but not the greatest, then. 35 information from these channels is recorded in memory block 15 simultaneously with

the address and arrival time, and the recording is made at the pace of operation of the generator 11. In this case, the signal from the comparison unit 16 starts the analog-to-digital converter 14, and a signal is sent from AND 17 to the Record unit in the memory block 15.

Information from block 15 is transmitted through block 13 to the communication line in case if during the whole cycle none of the channels has an error greater than the specified one. At the same time, on the first cycle of operation of the distributor, the trigger 18 is set in such a position that a signal 1 appears at its output. When an error of greater than a given value appears in any channel, trigger 18 is reset to O. If

45

50

however, this did not happen during the cycle time, then a single signal from the last output of the decoder 8 is sent to the first input of element 19, and blocks 15 and 13 are fed from element 19 of the signal Read, allowing one sample to be transferred from block 15 to block 13 into line of communication. In this case, the outputs of the analog-digital converter 14 must be logical zeros, which can be organized using a zero signal from the element OR 29 (for example, gating the output register of the converter 14)

However, in the course of device operation, a situation is possible when a low-active or faulty channel is not interrogated and not recorded, which leads to an unacceptable approximation error (in the event of a malfunction) and to the possible inconvenience for the user. To eliminate this phenomenon, a control node is inserted into the device. The control is performed sequentially, starting from any channel depending on the initial state of the counter 21. The code from the output of the counter 21 is compared by the block 23 with the address code at the output of the switch 22, i.e. at the output of the counter 9. If, for the maximum possible time determined by the clock 28, the address of the output of the counter 9 at the moment of the end of the conversion of the parallel code to the serial code and transmission of the serial code to the communication line is the same as the output of counter 21, then a signal appears at the output of code comparison block 23, switching counter 21 to the next channel for monitoring and resetting the sensor 28. If the time determined by the setting device 28 is not enough for the monitored channel address code to appear, the output of the counter 9, the dial 28 is triggered. The signal from its output using the element 25 and the trigger 24 through the switch 22 connects the counter 21 to the decoder 8 and at the output of the decoder corresponding to the controlled channel, a signal arrives at the control inputs of the keys 3 and 4. Through the element 29 the signal trigger 24 triggers analog-to-digital converter 14, and analog signal sig0

The cash is converted into a code that comes with the address in the readout block 13.

When the transmission is completed, the signal from the output of the code comparison unit 23 resets the setting device 28, and the counter 21 switches to the next position. At the same time, the trigger 24 is reset to the zero state, and the switch 22 is set in such a position that its outputs receive a code from the output of the counter 9 and the channel search begins with the greatest approximation error.

Claims (1)

Invention Formula Adaptive switch of telemeasuring system according to author No. 769589, characterized in that, in order to increase the reliability, a switch, an inverter 5 intervals, the OR element, the additional counter and the second additional comparison block and trigger, the third and fourth additional AND elements, between the outputs of the counter and the corresponding combined inputs of the decoder, the read block and the buffer memory block are connected with their respective first inputs and outputs, between the output of the first additional unit of comparison and the second control input of the analog-digital converter are connected the element OR by its first input and output respectively, the second The OR input of the element is combined with the control input of the switch and connected to the output of the second additional trigger, between the control output of the readout unit and the zero input of the trigger. c is connected to the third additional element And its first input and output, respectively, the output of the clock pulse generator is connected to the first input of the time interval generator, the output of which is connected to the first input of the third additional element And, and through the inverter to the second input of the third additional element And, the output of which the output of the fourth additional element And are connected respectively to the first and second inputs of the second additional trigger, the switch outputs are connected to the corresponding first y five 0 0 five 7 16548558 inputs of the second additional time-interval and is connected to the comparison high, the second inputs of which by the second additional block are combined with the corresponding second-comparison, the control inputs of which are the inputs of the switch and connected to the corresponding outputs of the additional additional element Both and the sub-counter, the input of which the keys to the control output of the block are combined with the second input of the master of the reader.