SU991473A1 - Telecontrol command receiving device - Google Patents

Description

(54) DEVICE FOR RECEPTION OF TEAMS

one

The invention relates to automation and telemechanics, and in particular, to -; It can be used in remote control system 4ax - remote signaling (TU-TC) by radio means for receiving and decoding remote control commands.

A device for decoding cyclic codes (containing a drive, decrypted), a phasing unit per clock, a command analyzer, and distributors of clock and elementary pulses is known.

The device has low noise immunity due to the lack of selective reception of telecontrol commands that require immediate execution and commands that allow accumulation with checking the correctness of transmission and execution by transmitting a short single command. This leads to the formation of false commands and unauthorized alterations of radio equipment.

The closest in technical essence to the invention is a device for receiving telecontrol commands containing a storage device, the first output of which is connected to the input of the periBoro signal decoder, the first output of which is connected to the first control panel.

the input of the block of elements And, to the second input of which the second output of the accumulator is connected, the third output of which is connected to the first input of the comparison unit, the first output of which is connected to the third input of the block of elements And, the phasing unit, the first output of which is connected to the first l input of the first pulse distributor and with the first input of the accumulator, to the second input of which the output of the I element is connected, the second output of the phasing unit is connected to the input of the second distributor. There are 15 pulses, the first output of which is connected to the first input of the electric ment and second vykod connected to the second input of the comparison unit, to whose third input connected to the output of the distributor pervo20 pulses WMOs device connected to the input of the phasing block and a second input of AND t2.

A disadvantage of the known device is - low g resistance resistance.

The aim of the invention is to increase the noise immunity and reliability of receiving information.

This goal is achieved by the fact that the device for receiving remote control commands, containing a drive, the first output of which is connected to the input of the first A (a1 signal generator, the first output of which is connected to the first input of the AND block, the second input of the second output accumulator, the third the output of which is connected to the first input of the comparison unit, the first output of which is connected to the third input of the block of elements I, the phase block (the first output of which is connected to the first input of the first pulse distributor and with the first input of the accumulator, to the second input of which the output of the element I is connected, the second output of the phasing unit is connected to the input of the second pulse distributor, the first output of which is connected to the first input of the element And, the second output is connected to the second input of the comparator unit, to the third input of the output of the first pulse distributor is connected, the device is connected to the input of the phasing unit and the second input of the AND element, the second, third and fourth signal decoders, OR elements, shift register and switching the trigger, the output of which is connected to the fourth input of the block of elements I, the output of which is connected to the input of the second signal decoder, the third output of the second pulse distributor connected to the first input of the shift register, the output of which is connected to the input of the third signal decoder, the first output of which is connected to the terminal to the input of the block of elements And, the output of the comparison block is connected to the second input of the shift register, the second output of the third signal decoder is connected to the first input of the first OR element, the output of which union of the first input of the switching flip-flop, the fourth

(The output of the accumulator is connected to the input: the fourth signal dimmer, which is connected to the second input of the first OR element and the first input of the second OR element, the output of which is connected to the second input of the first pulse distributor, the output of the first signal diverter is connected to the second inputs of the second OR element and the switching trigger The output of the second signal decoder is connected to the third input of the first OR element and the output of the device.

The drawing shows a block diagram of the proposed device.

The device contains a blocking 1 phasing, the first and second distributors 2 and 3 pulses, element 4,

accumulator 5, first decoder of signals b, block 7 of comparison, block 8 of elements AND, switching trigger 9, second and first elements OR 10 and 11, third, fourth and second 5 encoders 12-14 signals, shift register 15, input 16 and output 17 of the device.

Remote control commands are received at the device input 16 in the form of sequence of code combinations. They are fed to the input of the phasing unit 1 and the AND 4 element, to the second input to which the gating pulses of the distributor 3, the controlled block 1, are supplied. From the output of the element

And, 4 telecontrol information is recorded in accumulator 5. After registering the cyclic phasing code pattern, which can be used as code combinations. the setting of the operating mode, at the output of the decoder 6, the pulses of resetting the distributor 2 to the initial position and the pulses of opening of the block 8 appear, corresponding to the set operating mode of the receiving device: writing to the drive, immediate execution, reading. In the process of receiving and writing to the accumulator 5, they are analyzed for compliance with the coding law performed by block 7. In the absence of distortions of the code combinations, block 7 generates and transmits to block 8 the resolving potential, by which the code combinations written to the accumulator are read into the decoder 14 and in the form of a control signal, the controllable radio equipment is fed to output 17.

During the operation of the device, the signals for the presence or absence of distortions are recorded by the S shift register 15 and decrypted by the decoder 12, one of the outputs of which

5 serves to control block 8,

prohibiting decoding if the frequency of errors is exceeded. The decoding signal is generated by trigger 9 and supplied

0 to the input of block 8. The trigger 9 is switched to the decoding resolution state by a signal from the output of the decoder 6 after receiving one of the key code values without distortion

5 i combinations.

The trigger 9 is switched to the prohibit decoding state by a high voltage turn-on signal received at the second input.

0 trigger 9 through the element OR 11 from the output of the decoder 14, by the end of telecontrol signal after the decryption of the code pattern Rest, coming from the output of the decoder

5 13 through the element OR 11, and after the second threshold of the frequency of distortion is exceeded, the signal from the output of the decoder 12 through the element OR 11 to the second input of the trigger 9, a feature of the device is blocking the decoder of the receiving device for a time no radio remote control commands are transmitted. The transition to the blocking mode is carried out automatically in 3 cases: - end of the control of the radio transmitter and the transfer at the end of the telecontrol loop of the command to turn on the radio transmitter, after which it is not allowed to be rearranged; - end of the telecontrol cycle, after which the “Rest” code combination begins to flow into the channel — increasing the frequency distortion of the code combinations, which is a consequence of the deterioration of the telecontrol channel condition, its complete breakdown, or disturbance in the operation of the telecontrol equipment. Unlocking is performed after the transfer of one of the key code combinations. The switch signal is generated by the decoder 6 and is fed to the input of the trigger 9. The looping is performed both when decrypting one of the key combinations and when decrypting the code pattern by Rest. The blocking signal of the device after the completion of the telecontrol cycle is generated by the decoder 1 and through the OR 11 element arrives at the second input of the trigger 9. -. And p and meer. Telecontrol code combinations K, ...,. Kg, 6-4 are fed to the input device. On the reverse channel of the telecontrol system, command confirmation signals are sent to the control point about the correctness of command execution. . ., TKg ,,. . . . After reception and despreading of the Kg code combination Turn on the radio transmitter, which is transmitted. At the end of the telecontrol cycle, the signal of the receiver's decoder (PU) is generated. The distortion of the following K code combinations can no longer lead to false rearrangements of the radio transmitter, since the block 8 of the elements And from the trigger 9 gives a prohibitory signal. When controlling other radio sets of the radio station or controlling the radio transmitter without turning it on, the decoder output is blocked after decoding the code pattern. Rest, additionally, 2-3 repeat command code combinations are received since the transmission of the acknowledgment is delayed by the time of receiving the next combination and generating confirmation as well as inconsistencies between the phases of the instruction decoder and the confirmation encoder. In the event of an increase in the level of interference in the channel or a complete channel interruption, as well as in the case of some malfunctions of the telecontrol equipment, unit 7 generates error signals, which are recorded by the shift register 15 and deciphered by the decoder 12, which generates signals exceeding the distortion frequency P and threshold P. The signal for exceeding the threshold P comes from you of the flow of the decoder 12 through the element OR 11 and overturns the trigger 9, thereby auto-blocking the decoder. Since the telecontrol mode, i.e. the time of transmission of commands by modern radio facilities is incommensurably smaller than the interval of rearrangements (the time of transmission of commands is 5–10 s, the number of rearrangements per day is 4–8, i.e. the interval is 4–8 h), then the application of the proposed device increases by 2–3 times , noise immunity in comparison with known devices. The transmission time of the telecontrol commands when using the proposed device remains unchanged due to the combination of the functions of the phasing code combinations and the selection of the control mode implemented in the known device with the functions of the phasing, operation mode selection and opening (unlocking) the receiver decoder. There is also no need to transfer a special code combination. Rest, since in the absence of information, any synchronous system transmits an initial CODE combination, which can be used as a rest code combination. Since the known device contains a code analyzer for compliance with the encoding law, to form a signal of the channel quality, the presence of a break and a fault is sufficient to introduce into the proposed device the shift register and the decoder that perform the functions of the error signal integrator. The technical and economic efficiency of the invention is to improve the noise immunity of the proposed device. Existing telecontrol systems that use redundant codes for the transmission of telecontrol commands, a synchronous synthesis method and information feedback.

Under the conditions of preparation of radio media in automated communication systems, they do not meet the requirements set by the permissible value of the probability of distortion of the telecontrol commands.

The accuracy of the execution of a false command in the proposed device is reduced by two orders of magnitude compared to the known one at least.

Thus, the application of the proposed device as part of remote control systems significantly improves one of the main qualitative characteristics - noise immunity, defined as the probability of distorting remote control commands, which is achieved by relatively simple technical means without changing the code and method of sending commands.

It is also of course that the use of a hydraulics device does not impair the temporal characteristics of telecontrol systems.

Claims (2)

1. USSR author's certificate 613515, class, H 04 J 17/30, On F 11/10, 1978. 5 G 2. USSR author's certificate number 643948, cl. G 08 C 19/28, 1977 (prototype).