SU1088050A1 - Device for transmitting and receiving telecontrol and supervisory indicating signals - Google Patents

Abstract

A DEVICE FOR TRANSMITTING AND RECEIVING TV CONTROL AND TELESIGNALIZATION SIGNALS, containing a distributor, the control outputs of which are connected to the transmitter information input through a corresponding transmitter transmitter, the transmitter input is connected to the first synchronizer output of the filter, and the transmitter is connected to the first synchronizing output of the distributor, and the transmitter output is connected to the body of the filter and the transmitter is connected to the first synchronizing output of the distributor , the first output of which is connected to the distributor input, the filter output is connected to the input of the limiting amplifier, and Also, the first and second elements AND, characterized in that, in order to improve the reception accuracy, three triggers are introduced, an element ZI-SHSh, a counter with a deflector, a third And element, and a frequency divider, the installation and measurement inputs of which are connected respectively to the first the output of the clock pulse generator and the output of the amplifier-limiter, while the second output of the clock pulse generator is connected to the first inputs of the first, second and third elements And, the second inputs of which are connected to one of the outputs of the counter with deshi Ratio, the installation input of which is connected to the output and the inhibiting input of the frequency divider, the counting input of which is connected to the counting input of the counter with the decoder, the other outputs of which are connected to one (Limi inputs of the element ZI-1SHI, the other inputs of which are connected to the outputs of the first, the second and third triggers, to the first inputs of which are connected respectively the outputs of the first, second and third elements I, the third inputs of which are connected to the second synchronization output of the limiter corresponding to the control The output of which is connected to the 5th inputs of the first, second, and third flip-flops, and the corresponding output of the counter with decryption is connected to its prohibitory input.

Description

The invention relates to telegraph communication and can be used in time-frequency telemechanics systems with rigid-cycle synchronization.

A device for receiving telecontrol and remote signaling signals is known, comprising first and second limiters, AND elements, triggers, and an inverter of reference voltages Cl.

A disadvantage of the known device is the low reliability of reception when the phase of the frequency-manipulated signal is discontinued, which is possible, for example, with switching in a communication line.

The closest technical solution to the invention is a device for transmitting and receiving telecontrol and tel.algation signals, which contains a distributor, the control outputs of which are connected to the information input of the transmitter through the corresponding tele-alarm sensors, the control input of which is connected to the first synchronizing output of the distributor, the transmitter is connected connected to the inputs of the filter and the clock pulse, the first output of which is connected to the input of the distributor, - output d filter connected to the input limiting amplifier and the first and second members and 2.

A disadvantage of the known device is the low reliability of reception due to a change in the frequency of the clock pulses, which results in a shift in the beginning and end of the dressing.

The aim of the invention is to increase the reliability of reception.

The goal is achieved by the fact that the device for transmitting and receiving telecontrol and telealarm signals, containing a distributor, the control outputs of which are connected to the information input, through the corresponding p, at the television signaling terminal, to the first input synchronization output of the distributor, the output of the transmitter is connected to the filter and clock driver connected together, the first output of which is connected to the input of the distributor, the output of the filter is connected to the input sili- ter limiter, as well as the first and second elements AND, three triggers, the ZI-OR element, the counter with the decoder, the third element AND, and the frequency divider, the setting and counting inputs of which are connected respectively to the first output of the clock pulse generator and to the output of the amplifier the limiter, while the second output of the clock-shaped pulse body is connected to the first inputs of the first, second and third elements And, the second inputs of which are connected to one of the outputs of the counter with the decoder, the set input of which is connected It is equipped with an output and a forbidding input of a frequency divider, the counting input of which is connected. with a counter input of the counter with a decoder, the other outputs of which are connected to one input of the ZI-OR element, the other inputs of the standard are connected to the outputs of the first, second and third triggers, the first outputs of which are connected to the outputs

5 of the first, second and third elements And, the third inputs of which are connected to the second synchronizing output of the distributor, the corresponding control output of which is connected to the second inputs of the first, second and third triggers, and the corresponding output of the counter with the decoder by the entrance.

Fig. 1 shows a functional electrical circuit of the device; 2 shows diagrams for his work;

The device contains a transmitter 1, a distributor 2, sensors 3 remote signaling, shaper 4 clock. impulses, filter 5, divider 6 hours, the first element And 7, the second element And 8, the third element And 9, the limiting amplifier 10, the first trigger II, the second trigger 12, the third trigger 13, the element ZI-IPI 14 and the counter with decoder 15.

The device works the footing in a skinny way.

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When you connect the device to li-. Research Institute of Communications, in which. combined supply channel from an intrinsically safe source and telemechanics channels for transmitting synchronization signals of distributors and high-frequency signals, alternating synchronization voltage. (Fig. 2a) is fed to the shaper of 4 clock pulses (a block for clock pulses and a block for dividing the fronts). The leading edge of the clock impulse (Fig. 21) switches the distributor 2 and sets the frequency divider 6 to zero. The distributor 2 is switched on in an annular circuit and is under the influence of clock pulses (Fig, 25) in the continuous connection mode. At the beginning of the cycle of operation of the distributor 2, a pulse is sent to the control input of transmitter 1 from the first synchronization output (FIG. 2b, which uses distribution distributions for synchronization, for example, at the control point. When the remote signaling sensor 3 is turned on, the object is monitored the controlled point, the object and the type of operation on the pneumatic control point of the control), the pulse from the control output of the distributor 2 (Fig.2e) through the closed sensor contact is fed to the information input Transmitter 1. The frequency-manipulated signal from the output of transmitter 1 enters the communication line. At the moments of possible occurrence of the telecontrol command's timing pulse, the pulse from the second synchronization output of the distributor 2 goes to the third inputs of the first, second and third elements AND 7-9. From the high-frequency signal of the remote control, the filter selects from the various signals differing in the carrier frequency, the corresponding frequency-manipulated signal (Fig. 2). From the output filter 5, the frequency-manipulated signal enters through an ampillator — it will limit 10 (FIG. 2z) to a counter with decryption unit 15 and to a frequency divider 6, in which the number M (1G-1G) -1 will be recorded in binary code, where the lower characteristic frequency; the duration of the clock pulse; reducing the duration of the clock pulse. When recording in the divider 6, often, the number N impulse from its input (FIG. 2i) removes the signal of the resolution resolution and zeroes the counter with the decoder 15. The counter with the decoder 15 receives the pulse sequence received on its account. limiter 10, and converts it into a position code (FIG. 2K - C). At the end of the clock pulse, the signal from the output of the clock 4 clock pulses (FIG. 28) goes to the first inputs of the first, second and third elements And 7-9. the presence of coincidence signals, for example at the input of the second element and AND 8, in its code isolate impulses of coincidence (Fig. 2t). The presence of a coincidence signal at the output of the second element AND 8 indicates that the frequency of the clock pulses did not change.At the same time, in the counter with the decoder 15, the number of the signal coincides with the output The second element And 8 arrives at the second trigger 12, setting the latter to one state (Fig. 2y). From the output of the second trigger 12, the signal arrives at the input of the ZI-OR element 14, preparing the latter for reception. information package. It is assumed that during the cycle time of the distributor 2 (), the frequency of the clock pulses does not change. The next beat will be recorded in. the frequency divider 6 is the number N (fig.2i), and in the counter with the decoder 15 (fig.2c) the number 2m + Aif + l, where m is the frequency modulation index. The moment of coincidence of the signal coming from the trigger 12 and the signal coming from the counter with the decoder 15 corresponds to the arrival of the information pulse (Fig. 2). Subsequently, during the operation cycle of the distributor 2, information pulses are extracted. Signals from the output of the ZI-OR 14 element are received through a decoder, where a received command is checked, on a block of key elements, providing control of the telecontrol objects. At the end of the dispenser cycle 2 (t2), the falling edge of the pulse from the control output of the last cell Hfig.2e) returns to the initial zero state the second trigger 12 (Fig 2). In this case, if the telecontrol command is transmitted, the circuit proceeds to re-receive the telecontrol signals, but in the next cycle of the distributor 2. In the next cycle of the distributor 2, when the clock frequency changes, for example, during the clock pulse, the number N in the frequency divider 6 will be written the binary code, and in the counter with the decoder 15 - the number + ui) + l, where the increase in the duration of the clock pulse. The coincidence signal from the output of the third element And 9 enters the third trigger 13, setting the latter to one state. The signal from the output of the third trigger 13 is fed to the input of the ZI-OR 14 element, preparing the last one for receiving the next parcel. In the next cycle, if there is an information parcel, the number 2t 4-f will be recorded in the counter with the decoder 15 (LTH where t is the index frequency modulation at a frequency of clock pulses equal to f - 4f. When the signal from the third trigger 13 coincides with the signal from the counter with the decoder 15, the pulse at the output of the ZI-OR 14 element repeats ets. The device automatically records the change in the number of received pulses of a high-frequency parcel when the duration of the clock pulses changes. At a clock frequency equal to f. + L, the number N will be recorded in the frequency divider 6 in the frequency divider, and in the decoder counter 15 - number f (b-fj-Ntl. The coincidence signal from the output of the first element And 7 goes to the first trigger 11, sets the latter to one state. The signal from the output of the first trigger 1 1 goes to the ZI-OR 14 element, preparing it to receive the information parcel. If there is an information parcel in the next clock in the counter with; decoder 15 will write the number 1 + 2m, where g is the index of frequency modulation at a clock frequency of f 4-4fL, At the time of coincidence, the signal from the first trigger 11 and the signal from the counter with the decoder 15 are output from the ZI element - OR 14 turns on the pulse; In the future, the cycle of operation of the device is repeated. The technical and economic effect of the invention is to ensure high reliability of the reception of telemechanical signals regardless of the limits of the change in the clocking frequency.

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Claims (1)

TRANSMISSION DEVICE AND RECEIVING SIGNALS remote control and remote signaling, comprising a distributor 'control outputs which _hr through appropriate sensors telesignalization connected to the data input of the transmitter, a control input of which is combined with the first timing output of the distributor, the transmitter output is connected to the joined together inputs of the filter and shaper clock pulses, a first output which is connected to the input of the distributor, the output of the filter is connected to the input of the amplifier-limiter, as well as the first and second elements s AND, characterized in that, in order to increase the reliability of reception, three triggers are introduced, a ZI-OR element, a counter with a decoder, a third AND element and a frequency divider, the setting and counting inputs of which are connected respectively to the first output of the clock shaper pulses and with the output of the amplifier-limiter, while the second output of the pulse shaper is connected to the first inputs of the first, second and third elements And, the second inputs of which are connected to one output of the counter with a decoder, the installation input of which it is single with the output and the inhibitory input of the frequency divider, the counting input of which is connected to the counting input of the counter with a decoder, the other 55 outputs of which are connected to one inputs of the ZI-OR element, the other inputs of which are connected to the outputs of the first, second and third triggers the first inputs of which are connected respectively the outputs of the first, second and third elements And, the third inputs of which are connected to the second synchronizing output of the distributor, the corresponding control output of which is connected to • the second inputs of the first, the second and third triggers, and the corresponding counter output with decrypto is connected to its inhibitory input.