SU1441436A1 - Device for receiving remote control commands - Google Patents

Abstract

The invention relates to tele-mechanics devices with a time division of signals, providing the reception of comans, control of two-position objects. The goal is to increase the reliability of the device. The device comprises a command receiving unit 1, a memory unit 2, an analysis unit 10, a control unit 16 .., an amplifier unit 3, a parallel code-to-code conversion unit 21, a clock pulse generator 23, a distributor 9 and a comparator 24, a key block 4 , block 5 output relays, inverter 6, elements AND 24, 25, elements {1PI 26-29, timers 7, 8, trigger 32, counters 30, 31 j. The goal is achieved by comparing the received code of a comavda and re-entering from the communication line, with all the main units of the device being included in the comparison circuit, which ensures dynamic control of the equipment operability, 2 hp. f-ly, 1 ill. c (C (L

Description

oo and

The invention relates to time-division telemechanic devices that enable the reception of control commands for on-off objects.

The purpose of the invention is to increase the reliability of the device.

The drawing shows a diagram of the proposed device.

The device for receiving telecontrol commands contains a block for receiving commands, a memory block 2, a block of 3 amplifiers, a block of 4 keys, a block of 5 output relays, an inverter 6, timers and 8, a distributor of 9 pulses, an analysis block 10 performed on the power bus 11, the closing contract 1 2 and the signal level driver 13, consisting of a resistor 14 and a zener diode 15, a control unit 16, executed on the block 17 depffreaders, an OR element 1 and delay elements 19 and 20, a parallel-to-code conversion unit 21, the comparator 22 23 clock pulse generator, er Elements 24 and 25, elements OR 26-29, counters 30 and 31 and trigger 32, Blocks 2, 3, 5, 10 and 17 consist of groups of objects in a group and a type of command.

The device works in the following way.

A sequential telecontrol command code, which includes a synchronization sprinkling (starting combination), signals of the position code of the group number, the object in the group, and the type of co-v remote control command (for example, Enable or Disable), repeated twice to increase confidence, come from the communication line block 1. After block 1 selects the sync string, a signal is generated at its second output. This signal corrects the phase of the signals of the generator 23 and sets the initial state of the distributor 9 of the trigger 32 and counter 30. The signal 1 appearing at the output O of the distributor 9 is fed to the second inputs of the memory elements of block 2, the first inputs of which are fed the signals from the output of block 1, and the third from the clock signals from generator 23. The signals from generator 23 also go to counter 30, the output of which records the number of received bits of the input serial code

0

d

five

0

0

five

teams. The signals from the counter 30 are sensed by the decoder 17 of the block 16. The inputs of the decoder 17 are connected to the outputs of the counter 30 so that a pulse is formed at its output upon completion of the input of the entire code pattern. So, if the last sequence in the input sequence is the signals of the number of the control object in the group, the signal at the output of the decoder 17 corresponds to the reception of the last bit of the object number.

The delay created by element 19 allows the completion of the last bit in the memory blocks, and then the signal from element 19 through element 11 of the counter 28 returns to the initial state, and the distributor 9 is transferred to the next position. In this case, a signal 1 is formed at the output 1 of the distributor 9, by which element I 24 is permitted. In this position, the splitter checks the correspondence of the signals fixed by block 2, amplified by block 3 and re-received by block 1.

The comparison is made by comparator 22, perceived serial codes from converter 21 and inverter 6. On Converter 21, the signals come from the output of analysis unit 10. Each signal at the output of block 10 is determined by the signal at the input of an individual chain, which, in turn, corresponds to the signal at the output of each amplifier of block 3.

If the amplifier unit 3 is not. a working signal is given from the corresponding output of block 2, a high signal level is applied to the input of the corresponding individual block 10, corresponding to the value of the turnkey supply voltage. Using resistor 14 and the zener diode 15, the output signal of block 10 is generated, the level of which (specified by the reference voltage value Zener diode 15) is chosen to be at an equal operating level for the element base used for the implementation of the device. In addition, the stabilization of the swarm 15 prevents the entry of hazardous signals to the device level elements along the circuits with remote relay blocks from the rest of the circuit, which, in order to simplify installation, are placed next to the actuators (oil pressure switches, disconnectors, starters, etc.)

From the memory elements of the block 2, which recorded the reception of signals 1 from the communication line, through the block 3 of amplifiers, working signals are sent to the corresponding relays 5. The corresponding chains of the block-10 are supplied with low-level signals, which are retransmitted to the outputs of block 10. As can be seen, the signals at the output of block 10 are inverted relative to those received from the communication line. To compensate for the effects of inverting the signals, the input of comparator 22 is transmitted for comparison by the signals inverted by inverter 6. Signals from converter 21, which perceives the parallel code from block 10, and the second ( address) inputs - signals from counter 30. The signals from counter 30 correspond to the current signal numbers input to block 1, whereby the converter 21 provides a synchronous display of the code. The previously received from the communication line and fixed by block 2. Since the serial code was obtained taking into account the state of blocks 3 and 5, a significant part of the device hardware is connected to the comparison circuit. If during the comparison process the comparator 22 detects a mismatch (due to communication errors, malfunction of the elements of blocks 2, 3 and 5 or due to the false closure of the contacts 12-1, ..., 12-n output relays, signal 1 through Element 24, whose operation is resolved by the signal from output 1 of distributor 9, and element OR 29 sets trigger 32 to state 1 The signal from the inverse output of trigger 32 through element 25 arrives at the second input of block 4, allowing operating signals to the inputs of the block of the output relay of the form of the telecontrol command only if No errors in the operation of the device and distortions of the command code received.

The monitoring mode is conducted at the time when the output relays of the 5-Y blocks are still in the passive state,. since signals to install them into working condition are given only after receiving the command. Therefore, with the delay

Q 5 5 o Q

five

0

five

Which takes into account the response time of the output relays, the device re-checks the correctness of the received code and the operability of the equipment.

The incoming control command contains more than one working signal indicating the group number, the object in the group and the type of the telecontrol command, i.e. at any time, a command can be transmitted only to one object. To check the correctness of the received command, the number of fixed signals is monitored separately for time zones for receiving signals of the group number, the object number in the group, and the type of command supplied by the telecontrol. The edges of these zones are fixed by the decoders 17 of block 16. The decoders 17 form signals when the last bit of the corresponding time zone is received. Signals from decoders 17 through the OR element 18 and the first delay element 20 are transmitted through the OR element 27 to the reset input to O of the counter 31. The delay is chosen such that the signal from the converter 21 corresponding to the last bit of the code controlled area. If by this time two or more signals have not been entered into the counter, the signal from the output of the counter (from bit 2) to the element OR 29 is not received, and the trigger 32 does not register an error. Otherwise, until the signal from the element 20 of the input to the reset of the counter

31, at its specified output, a signal 1 is generated, translating w 1st trigger

32 in state 1. Thus, control of the actuating elements is blocked and the distributor 9 is brought to the initial state. When monitoring the number of fixed operating signals in each of the time zones, the operability of the main units of the device is monitored.

If there are no errors on the signal from the generator 23, the counter 30 returns to the initial state, and the distributor 9 is transferred to position 2. The signal 1 is fed to the input of timer 8, the time interval of which is set equal to the response time of the output relay block

Cove 5. During the time of operation of the timer 8. by a signal from the element OR 28, the counter 30 is held in the initial state. After the timer 8 has been activated, the operation blocking signal of counter 30 is removed and control of the output code generated by block 19 for each of the time zones of signal analysis of groups, objects in the group and type of remote control command is started. When the control is repeated, the output relays of the groups and objects in the group to which the control signals are applied are already in working condition, controlled by the position of the contacts t2-1, ..., 12-p. If none of the output relays falsely turned on, at the end of the monitoring interval, Tptirrep 32 is held in the state O, and the distributor 9 (by a signal from element 19) is transferred to state 3. The signal, from output 3 of the distributor 9, together with the signal from the trigger 32 arrives at element 25, which permits the passage of signals from the output of the block 3 amplifiers through the block 4 intermediate keys to the inputs of the block 5 output relays.

Simultaneously with the setting of the keys of the block 4, the signal from the output 3 of the distributor 9 is transferred to the working state and timer 7, the structure of which is similar to timer 8. The time interval set by timer 7 corresponds to the retention time of the actuators in the active state, which can fluctuate for different implementations of the device from fractions to tens of seconds. Upon completion of the time interval set by timer 7, the signal from element 19 distributes the distributor 9 to position 4, and its further operation is blocked until the next reset signal is received when a new command is received. Sig saw 1 from exit 3 of distributor 9 disappears. A signal from the output 4 of the distributor 9 is returned to the O memory elements of the block 2. The device is put into the mode of waiting for the arrival of the next team.

Claims (3)

1. Device for receiving a comawd control unit containing a command receiving unit whose input is the first input of the device, an output of the command receiving unit is connected to the first inputs of the memory unit, an output relay unit whose outputs are the device outputs, an analysis unit whose output is connected to the first input of the parallel conversion unit code in serial, the output of which is connected to the first input of the comparator, the control unit and the pulse distributor, I distinguish Now that, in order to increase the reliability of the device, an amplifier block, a clock generator, elements I. are entered into it, elements of the ШШ, counters, timers, a trigger, a block of keys - and an inverter, the first output of the command receiving unit is connected via an inverter to the second input of the comparator, the outputs of the memory unit are connected through the amplifier unit with the corresponding inputs of the analysis unit and the corresponding inputs of the group, the key block whose outputs are connected to the corresponding inputs of the output relay unit, the second output of the command block receiving unit inen with clock input, first in By triggering the first and second OR elements, the output of the clock generator is connected to the second inputs of the memory unit, the first inputs of the timers and the first counter, the output of the last of which is connected to the second PY1-1 input of the conversion unit. - parallel code to the serial, input and control unit, the first one, the output of which is connected to: the inputs of the third OR element and the pulse distributor, the first output of the last one of which is connected to the third inputs of the memory unit, the second output of the pulse distributor connected to its second input and fourth inputs of the memory unit, the third and fourth outputs of the pulse distributor, respectively, are connected to the first input of the first element I and the second input of the first timer, the fifth output of the pulse distributor is connected to the second input of the second timer and the first input of the second element And whose output is connected to the input The key block house, the output of the first ele i And is connected to the first input of the fourth OR element, the output of which is connected to the second trigger input, the inverse output of which is connected to the second input of the second AND element, the direct output to the second input of the first OR element, the output of which is connected to the third input of the pulse distributor , the outputs of the first and second timers are connected to the second and third inputs of the third OR element, the output of which is connected to the second input of the first counter, the first input of the second counter is combined with the comparator input of the same name, the output of which It is connected to the second input of the first element AND, the second output of the control unit is connected to the second input of the second OR element, the output of the second OR element is connected to the second input of the second counter, the output of which is connected by 2 second input of the fourth OR element. 2. The device according to claim 1, wherein the analysis unit comprises a power bus and parallel connected chains, each of which is made on the signal level shaper and the closing contact of the output relay block, the first output of which is a form converter input The signals are combined and are the inputs of the block, the second output of the closing contact of the relay of the block of output relays and the second input of the signal level generator are combined and connected to the power bus, the outputs of all the signal level drivers are the output of the block. 3. The apparatus of claim 1, wherein the control unit comprises a decoder unit, an OR element, delay elements, inputs of the decoder unit are the input of the unit, and the first, second and third outputs of the decoder unit are connected to the corresponding inputs of the unit. OR, the output of which is connected to the input of the first delay element, l output of which is the second output of the block, the third output of the decoder block is connected to the input of the second delay element whose output is the first output of the block.