SU822227A1 - Telemechanical apparatus dispatcher's semiset - Google Patents

Description

The invention relates to telemechanics and is intended for telemechanization of irrigation and drainage energy-intensive distributed objects. A multichannel telemechanic device for time-divisiond distributed objects is known, which implements a method of electing objects by a parallel binary code over address (code) communication lines and contains a distributor, a binary counter, reception and transformation registers of telemetry, descriptors, memory blocks at the control room. ti, display unit UJ. A disadvantage of this device is the complexity of the apparatus, which is necessary to implement this method: low noise immunity, lack of accuracy of telemetry and considerable complexity of execution. The closest to the proposed is the dispatching half-set of a telemechanical device containing a power supply unit, the output of which is connected to the input of the command unit, the first output of which is connected to the first input of the digital printing unit. the second output is connected to the first input of the clock generator, the third output is connected to the first input of the inhibit block, the fourth output is connected to the first input of the clock pulse block, the fifth output is connected to the first input of the register, the sixth output is connected to the first input me1 to the circuit, the second input which is connected to the first output of the first register, the second output of which is connected to the first input of the block of linear feeders, the third output is connected to the input of the digital indicator, the fourth output is connected to the first input of the form block nor the polarities of pulses 1, the output of which is connected to the first input of the coding unit of the call pulses, the first input-output of which is connected to the first input-output of the block of linear feeders, the other inputs-outputs of which are connected to the communication line, the second input-output of the coding unit of pulses the call is connected to the first input-output of the switch of the type of teleoperations, the second input-output of which is connected to the input-output of the block of analog measuring devices, the second and third inputs of the switch of the type of teleoperations are connected with respectively, to the output of the telecontrol command generation unit and the first output of the pulse distributor, the first input of which is connected to the first output of the clock pulse generator, and the second output is connected to the input of the second register, the first output of which is connected to the input of the light indication unit, the second and third outputs through the decoders connected to the inputs of the third register, which are connected respectively to the input of the digital indicator teleimem%) and to the second input of the digital printing unit, the third input of which is connected The fourth input is connected to the fifth input of the first register, the output is connected to the input of the external processing unit and about, the information is changed, the output of the switch of the teleoperation switch is connected to the first input of the threshold element of the linear unit, the second output is through the linear unit the receiver is connected to the first input of the telecommunications processing unit, the second input is connected to the first output of the prohibition block, the second input of which is connected to the fourth output of the second register, the third input is connected to the first output clock pulses, the second output of which is connected to the second input of the polarization unit of the call pulses, the third input of which is connected to the output of the change unit; POLARITY, the sixth output of the first register is connected to the second input of the coding module of the call pulses, the & with the second input of the clock generator,

In this device, the linear reception unit is a threshold device, the trigger threshold of which is constant, strictly fixed, determined during adjustment. The speed of transmission and reception of information and the time of conducting tele-operations are also constant and spread out on the gearbox, as far as possible from dispatch point 2.

However, when ltnia parameters deteriorate, the threshold for triggering an input threshold device and the grief of teleoperation processes do not change, noise immunity falls and irreversible loss of information can occur.

In the described device, before starting the process of receiving and transmitting, the state of the communication line is not determined, and possible changes in the parameters of the data acquisition pulse as they pass through the communication line are not taken into account. This does not allow to increase the system noise immunity and accuracy of telemeasurement when the parameters deteriorate.

The Scientific Research Institute of Communications does not allow the automatic change of the threshold for triggering the input threshold device of the linear receiving unit and the speed of teleoperations.

Changes in the parameters of the data acquisition pulse for a given communication session are clearly defined and conditioned by the state of the communication line, transient processes arising in it from the presence of capacitances, inductances and leaks, changing their value by nojj effect of various factors, as well as interference as random and systematic, taking place in a real communication line.

The purpose of the invention is to increase the reliability and noise immunity of the device.

This goal is achieved by introducing a binary counter, a marker register, a tele-information register, a comparison unit, a linear pulse shaper, and a control unit, into the linear receiving unit of the device; the first input of which is connected to the first output of the linear pulse generator, the second output of which is connected to the second input of the threshold unit, the output of which is connected to the first input of the binary counter, the first output of which is connected to the first input of the comparison unit through the teleinformation register, the second output is connected to the first input of the register the marker, the first output of which is connected to the second input of the control unit, the second output is connected to the second input of the comparison unit, the output of which is connected to the second input of the distributor and pulses, the first input of the linear pulse shaper of the linear unit is connected to the second output of the prohibition block, the second input is connected to the sixth output of the command block, the third output is connected to the second input of the linear feeder unit, the fourth input is connected to the input of the polarity reversal unit, the second binary input The linear block counter is connected to the second clock generator output.

The drawing shows a block diagram of the dispatch half the telemechanical device. I. .

The semi-compact telemechanic device includes a power supply unit 1, a command unit 2, a clock pulse unit 3, a digital indicator 4, a signal polarity changing unit 5, a mnemonic circuit, a register 7, a call signal polarization unit 8, a linear reception unit (continuous tracking), teleinformation processing unit 10, clock generator 11, prohibition block 12, time encoder 13, digital printing block 14, external processing and exchange unit 15, digital data input block 16, remote control command generation block 17, block 18 natural feeders, call pulse coding unit 19, teleoperation type switch 20, linear block threshold element 21, binary counter 22, marker register 23-1, teleinformation register 23-2, control block 24, linear pulse driver 25, block 26 Comparison, distributor of 27 pulses, 28 code of teleinformation register, de-distributor 29-1 (coarse reference), decoder 29-2 of code teleinformation; accurate readout, register 30 (binary-n-decimal codes), digital display 31 of telemetry, block 32 of display indication, block 33 of analog, measuring instruments.i

The device works as follows.

The device is controlled completely by using the 2 i command and the execution of commands. (Power is supplied by a voltage of 220 V with a frequency of 50 Hz. Power supply block 1 is turned on by a corresponding toggle switch of block 2 and produces a set of constant and alternating voltages to power all components element of the device.

The set of the number of the object to be selected is carried out using the control buttons of the digital data input unit 16. An object number consisting of three digits: an octal system, is fixed in register 7 in binary form. Information about the number of the object to be selected is received in the mnemonic diagram of block 14 of the digital printing;

As soon as register 7 registers the first digit of the object number, the block of 18 linear feeders selects the corresponding feeder. Depending on the value of the second digit of the object number fixed in register 7, the call pulse coding unit block 19 selects a certain combination of call pulse lines and a certain structure of the paths of all working pulses to specific lines of the selected feeder. By the third digit of the object number, a certain combination of the polarities of the three call pulses is selected by the polarity generating block of the call pulses.

After the full number of the selected object is dialed, block 2 starts the clock pulse generator 11 and the former 25. The former 25 generates a square-shaped interrogation pulse and sends it directly to the communication line. When the interrogation pulse passes through the communication lines, its parameters change.

The modified survey pulse (marker) is fed to the input threshold device of the linear receiving unit that controls the input of the binary counter, opening it when the input signal level is higher than 5 of the specified threshold, and closing it if the input signal level is lower.

Binary counter, at the entrance of KOTOporV, simultaneously with the marker, are supplied

clock pulses from the generator 11 clock pulses, captures the change in the duration of the polling pulse (marker code) and sends it to write to the marker register 23-1.

5 The control unit 24 analyzes the marker code, corrects it, taking into account the possibility of short-term interference and sets the operation mode of the linear pulse shaper.

Q 25 for telemetry and for the formation of call pulses. The linear pulse shaper 25 sets the threshold of the input threshold element required for a given state of the communication line.

five

After determining the marker code, block 2 starts a block of 3 clock pulses for selecting an object that produces four clock pulses.

0 In the first cycle, the first trigger pulse of increased amplitude and the second call pulse are sent, the polarities of which are determined by block 8, and the direction 5 by block 19 of the call pulse coding.

During the second cycle, a pause is created and low voltage pulses are sent to the communication line.

0 During the third clock cycle, a third call pulse is sent, the duration of which, according to the received marker code, is determined by the driver of 25 linear pulses. Its polarity changes periodically.

 on the opposite side of unit 5, the polarity of the signals.

During the fourth cycle to the block 19, the pulse coding of the call is connected to the switch-switch 20 of the kind of teleoperations.

After selecting an object for telemetry, the shaper of 25 linear pulses and block 5, changing the polarities of the signals, form the opposite polarity pulses from the marker code, supplying them to the wire of the third call pulse to control the distributor in the control unit, and the pulses of the information. another wire through the input of the threshold element 21 of the linear receiving unit. The threshold element opens the binary counter input for the time of the arrival of the teleinformation pulse and clock pulses from the generator 11. According to

when the teleinformation pulses end, the counter input closes. Recorded on the counter. A code of one times-p and the information is recorded in the register 23-2 teleinformation. By the comparison unit 26, the received information code is compared with the mark code: pa. If the received code for the teleinformation is greater than the marker code, then the value obtained is taken as 1, if less, as O.

Through the pulse distributor 27, from the output of the comparison block 26, the code information features (logical signals O and i) are recorded into the corresponding bits of the register 28 of the code teleinformation.

The received code information is fed to the light indication unit 32 and to the decoders 29-1 and 29-2, which convert the original code teleinformation into an intermediate binary-decimal code. The decrypted information is recorded by the register 30, from which the information in decimal form enters the digital indicator 31 and in binary-decimal form - in the digital printing unit 14 and on external devices.

Control of command execution is performed by block 12 of the ban on command execution, with which you can program the command execution delay after telemetry. when sending telecontrol signals or during continuous telecontrol.

In the absence of commands to prohibit execution, the control room is set up for a multiple telemetry mode, in which the received information can be held for up to 2 minutes, after which it is periodically updated.

The telecontrol is carried out after telemetry by the telecontrol command generation unit 17. In the absence of telecontrol commands, the subsequent clock measurement by telemetry is idle.

In continuous telemeasurement, instead of the threshold element 21 of the linear receiving unit, a linear reception unit 9 is connected to the communication line, which generates signals of a change in the measured value for the information information processing unit 10 and in continuous monitoring.

The use of the dispatching half-set of a telemechanical device makes it possible, with changing the parameters of the communication line, to automatically change the threshold value of the threshold element of the linear receiving unit, to automatically set the deode operation speed that is optimal for this state of the communication line, which leads to a significant reduction in the total polling time of all monitored KP, increase

speed and increase the noise immunity of the device.

Claims (1)

Invention Formula The dispatcher is a semi-kit of a telemechanical device containing a power supply, the output of which is connected to the input of the command block, the first output of which is connected to the first digital printing input, the second output is connected to the first input of the clock generator, the third output is connected to the first input of the inhibit block, the fourth output is connected to the first input of the clock pulses, the fifth output is connected to the first input of the register, the sixth output is connected to the first input of the mimic circuit, the second input of which is connected to the first output of the first d the second output of which is connected to the first input of the linear feeder unit, the third output is connected to the digital indicator input, the fourth output is connected to the first input of the call impulse polarity forming unit, the output of which is connected to the first input of the call impulse coding unit connected to the first input-output of the linear feeder unit, the remaining inputs-outputs of which are connected to the communication line, the second input-output of the coding unit of the call pulses is connected to the first input output of the switch the type of teleoperations, the second input-output of which is connected to the input-output of the analog measuring-devices unit, the second and third inputs of the type of teleoperations are connected respectively to the output of the telecontrol command generation unit and the first output of the pulse distributor, the first input of which is connected to the first output of the clock pulse generator , and the second output is connected to the input of the second register, the first output of which is connected to the input of the light indication unit, the second and third .. outputs through decoders, podkl yucheny kr inputs of the third register outputs which are connected respectively to the input of the digital telemetering indicator and to the second input of the digital printing unit, the third input of which is connected to the input of the code ... time sensor, the fourth input is connected to the fifth input of the first register, and the output is connected to the input of the external information processing and exchange unit, The first output of the teleoperation switch is connected to the first input of the threshold element of the linear unit, the second output is connected to the first input of the teleinformation processing unit through the linear reception unit, the second input of which connected to the first exit