SU1179409A1 - Device for sporadic transmission of supervisory indication signals - Google Patents

Abstract

A DEVICE FOR SPORADIC TELESIGNALIZATION TRANSMISSION, containing a pulse distributor, the first outputs of which are connected to the first group of code converter inputs, a switch, the first output of which is connected to the first inputs of the first element And and the first inputs of sensors connected in parallel by the number of objects of remote signaling, the second switch output of the bodies is connected the first inputs of the second element And and the third element And with the second inputs of all sensors whose outputs are connected to the inputs of the second group the code recipient whose output is connected to the first input of the comparator and the second input of the first element AND whose output and output of the second element AND are connected respectively to the first and second inputs of the first element OR whose output is connected to the input of the register whose output is connected to the second input of the AND element and the second input of the comparator, the first output of which is connected to the second input of the third element AND, characterized in that, in order to increase the reliability of the transmitted signals, a fourth is entered into the device. the first element, the first, second and joint venture third triggers, the second element OR, the second output of the switch is connected to the first input of the fourth element And whose output is connected to the first input of the first trigger, the second output of the comparator is connected to the second input of the first trigger, the first output of which connected to the first input of the second OR element, the second output - to the first input of the second IRA trio, with the second input of which is connected to the third element AND; the output of the second trigger is connected to. the second inputs of the fourth element And the second element OR, and the first input of the third trigger, the second and third inputs of which are connected respectively to the first output of the switch and the second output of the pulse distributor, the output of the third trigger, co. dinene with the third input of the second trigger.

Description

This invention relates to telemechanic systems with time division signals and sporadic transmission. remote alarm after detecting a change in state of any sensor.

The circuit of the invention is to increase the reliability of the transmitted signals, in particular the elimination of the issuance of a false signal. Fault.

The drawing shows a block diagram of the device.

The device for the sporadic transmission of remote signaling contains a switch 1 with two switching contacts, the opposite extreme terminals of which are combined and connected to the grounded and ungrounded (YEL) power supply outputs, and the first and second middle terminals of the switching contacts are connected to the extreme terminals of sensors 2 consisting of a resistor and contact.

The middle terminals of the sensors are connected to the inputs of the converter of the 3 parallel code into the serial code. Other inputs of the converter 3 are connected by g 1, .., and the outputs of the distributor 4 and 1 pulses. The first and second middle pins of the switch contacts are connected to the inputs of the first and second elements AND, and the specified second output is also connected to the input tert1 of its element I. The outputs of elements 5 and 6 are connected by the shift register 8 through the first element OR 9. The register 8 is connected To the Data output and to the input of the comparator 10 together with the converter 3. The output 1 of the comparator 10 is connected to the input S of the first trigger 11, and the output O is connected via input And 7 to the input S of the second trigger 1 Output 12 of the trigger 12 is connected to the input D of the third trigger 13, with the inputs of the second OR gate 14, the fourth AND gate 15 with the output fault. The second input element And 1 is connected to the second middle output of the switched contacts, and the output from the input 1 of the first trigger. The output of the element OR 14 is fed to the request communication circuit. The output 1 of the trigger 11 is connected to the input of the second element OR 14, and the input O from the D input of the trigger 12, the C input of which is connected to the output O of the trigger 13. The input P of the trigger 13 is connected to the outputs of the distributor 4 and the input C to the first middle the output of the switching contacts of the switch 1.

The controls for switch 1, valve 4, setting the device to the initial state, as well as signal processing Requests, Data, and Fault are not shown in the drawing. The position of the contacts of the switch 1, shown in the drawing, corresponds to the lack of performance monitoring.

The device works as follows.

From switch 1 to sensor 2, the supply voltage Ef, is applied. In the position of the contacts of the switch 1 shown in the drawing, the voltage Ец is applied to the resistors R, and the potential of the contacts is zero. As a result, a signal 1 is sent from each sensor to the input of converter 3, if K is open, or signal O, if K is closed. The resulting parallel code is scanned with time separation for each bit by signals from outputs 1, ..., n of distributor 4, resulting in the output of converter 3 forming a sequential code arriving at the input of element And 5. Since its second input is supplied signal 1, element AND 5 relays the serial code from converter 3 via element OR 9 to an n-bit shift register 8. The output code of register 8 with a shift by one cycle of operation of the distributor 4 corresponds to the code at the output of converter 3. If the state of the sensors has not changed during the time between adjacent scans of the parallel code, these codes must completely coincide. Signal 1 of comparators 10 is not generated at output 1 and the first trigger 11 is not transferred to state 1.

If the state of any sensor has changed in the interval between adjacent scan cycles, the successive codes from converter 3 and register 8 do not match in all bits and trigger 11 is switched to state 1. A request for a signal is sent to the device output. To transmit information (not shown in the drawing), a signal is used. Data from register 8. To check the functionality of the elements, a special command is used to switch the contacts of switch 1. As a result, the voltage at the extreme terminals of sensors 2 is reversed, and, as a result, the parallel code at the input of the converter 3 it becomes inverse to the one that was supplied before the switching of the switch 1. From the control switch to the switch 1 is applied so that it switches outside the signal-shaping integrator 1. outputs,.,., n distribution box body 4 and was retained in a state opposite to that indicated on the dash, in the period of one scanning cycle parallel code. During the monitoring, the signal 1 is not fed to the input of the element And 5, so that the input of information from the converter 3 to the register 8 is blocked. At the same time, the input signal of the AND 6 element appears, which now relays the code from the output of register 8 to its input. Thus, during monitoring, the comparator 10 is supplied with an inverse code from sensor 2 and a direct code from the output of register 8, which displays the state of the sensors by the time control starts. If all elements of the signal transduction from the sensors are intact, the comparator 10 must fix the discrepancy in all bits of the codes being compared. The coincidence of the compared codes in the control mode means the failure of sensor elements 2, converter 3, distributor 4, register 8, comparator 10 or AND 5 and 6 elements, OR 9 element, i.e. The control circuit includes all device hardware. When a coincidence is detected, a signal 1 is formed at the output O of the comparator 10. This signal, through element 7, (the second input of which in the considered mode is signal 1) is fed to input S of the trigger 12, which forms the Fault signal. However, there is a danger of a false alarm. Fault if the state of contact of a sensor changes during the monitoring. As a result of a change in the state of the sensor, the signal in one of the bits of the parallel code is reversed, but 94 in connection with the general power reversal on sensors 2 is all. signals, including modified gaps, are inverted. As a result, a change in the sensor state during the health check does not lead to a fixation of a mismatch in all digits comparing the 10 codes comparators, which leads to the appearance of a signal. Fault -. In order to avoid the formation of a spurious signal. A malfunction is introduced into the device by trigger 13, element IL 14, element AND 15. The elements introduced work as follows. When a trigger 12 is installed in a control mode, a signal 1 is formed at the element output. And 15, since both its inputs are supplied with signals 1. This signal for the entire monitoring time, the trigger 11 is held in the state O. When the monitoring is completed, when the signal 1 is again formed at the first middle output of the switching contacts of the switch 1, the control signal is sent to O Trigger input 13. If, during control, trigger 12 was set to 1, then at the moment signal 1 is applied to the C input of trigger 13, it is set to 1 and kept in this state during this cycle, the codes from register 8 and converter 3 are compared again. , and from the register 8, a code is supplied corresponding to the state of the sensors at the time of the start of monitoring, and from converter 3 a code corresponding to the current state of the sensors. If the codes do not match, then it is not necessary to issue a fault signal, i.e. trigger 12 is set to 1 false. Since the codes do not match, the signal 1 from the output 1 of the comparator is set to 1 flip-flop 11 and the D input of flip-flop 12. A signal O is given. At the time of setting the flip-flop 13 to the state O (after the scan cycle is completed) the signal 1 is sent to O trigger input 12, and since its D-input has a signal O, trigger 12 is switched to the O state, and the Fault signal is not signaled. If during the control the trigger 12 was set to g 1 because of the instability of any element, and not the result of a change in the state of the sensor, there will be no control in the first scan cycle after the control is completed

There is a mismatch between the shunnable codes. Trigger 11 remains in

This is Oh, and from its output to the) input

, AC K1CH) LY11LiA: 1 1J trigger 12, signal 1 is sent. At the time signal 1 is sent, the O input of the trigger 12 is set to state 1 (its state 1 is confirmed) —the signal to the device input is a malfunction. In order to form an initiative signal, the Request for communication of a connection so from the result of the control, an OR 14 element is set up, to the inputs of which signals are given from the outputs 1 of the flip-flops 11 and 12.

Proposed device 1 About aeol ei to exclude a numeric helper ;;;; s; snyloop; Peerazhnost, p1b to bring up additional signaling; test the state of the {tactical sensors before the monitoring of the operability and if there is a discrepancy between the signal and the fault .

Thus, in the proposed device, the control of the health of individual elements is preserved, but due to the additionally installed elements they are blocked.

output of the L1) signal Fault, which increases compared to the known device dostover. H1.), produced signals.

"Data

ienpse

 /four

euc / rpaSffffc

Claims (1)

A device for sporadic transmission of telesignalization, comprising a pulse distributor, the first outputs of which are connected to the first group of inputs of the code converter, a switch, the first output of which is connected to the first inputs of the first element And and the first inputs of the sensors connected in parallel according to the number of tele-signaling objects, the second output of the switch: connected to the first inputs of the second element And and the third element And and the second. inputs of all sensors, the outputs of which are connected to the inputs of the second group of conversion a code divider whose output is connected to the first input of the comparator and the second input of the first AND element, whose output and the output of the second AND element are connected respectively to the first and second inputs of the first OR element, whose output is connected to the register input, the output of which is connected to the second input of the And element and the second input of the comparator, the first output of which is connected to the second input of the third element And, characterized in that, in order to increase the reliability of the transmitted signals, four are inserted into the device. the third AND element, the first, second and third triggers, the second OR element, the second output of the switch is connected to the first input of the fourth AND element, the output of which is connected to the first input of the first trigger, the second output of the comparator is connected to the second input of the first trigger, the first output of which is connected to the first input of the second OR element, the second output - with the first input of the second trigger, the second input of which is connected to the third element AND, the output of the second trigger is connected to. second inputs of the fourth AND gate and a second OR gate and the first input latch ^t retego, second and third inputs connected respectively to the first switch output and a second output of the pulse distributor, the output of the third flip-flop is coupled to a third input of the second flip-flop. SU „l79409> 1 1 79409