RU1818713C - Data transmitter survey device - Google Patents

Abstract

Usage: in communication technology, in particular in telemetry information processing systems. SUMMARY OF THE INVENTION: the device comprises a clock generator and n polling nodes, an OR element. four waiting multivibrators, valve first, second, third triggers, element I. pulse shapers. Each uavl of the survey contains the first and “second elements I. trigger, a unit for accounting the time of information processing, a controlled switching element. The purpose of the invention is to increase the reliability of the transmitted information, by eliminating the possibility of distortion of information when working in the line of several devices. 1 ill.

Description

The invention relates to communication technology, and in particular, to a system for automatically interrogating information sensors during operational processing of telemetric information taken from them.

The purpose of the invention is to increase the number of interrogated sensors while maintaining the reliability of the transmission of information.

The drawing shows an electrical structural diagram of the proposed device.

The device contains a clock generator 1. output pulses and n polling nodes 2. each of which contains the first 3 and second 4 AND elements, block 5 for recording time of information processing, trigger b, information sensor. 7. controlled switching element 8. In addition, the device contains an OR element 9, the first 10 and second 11 standby multivibrators, valve 12, the first trigger 13, the second trigger 14, the third trigger 15. the element And 16, the first and second additional standby

multivibrators 17,18, shapers 19. 20, second 21 and third 22 valves, a time relay 23, a start signal extracting unit 24 and a stop signal extracting unit 25.

The device operates as follows.

When the state of any sensor changes, a signal appears at the output of the OR element 9. Trigger 14 is triggered and the signal from its output goes to the input of the And element 16, signals the presence of information to be transmitted.

If the line is not busy transmitting information from another device, as well as in the initial state, the trigger is in state 1 (i.e., the stop signal was allocated by block 25, which set trigger 15 to state 1). Signal 1 from the trigger output is fed to the second input of the And 16 element and at its output (when the information changes), a signal is generated. Next, we consider two different options for the operation of devices.

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The first case is that information has changed in one device.

The signal from the output of the element And 16, passing through the open valve 12, starts the waiting multivibrator 17, which will form the start signal. This signal is transmitted via the OR element 18 to the line and received by the units 24 of all devices. At the end of the action in the line of the first start signal at the output of blocks 24 of all devices, a pulse is received that signals the allocation of this signal ..

In the device that generated and transmitted the first start signal to the line, upon its completion (by the pulse cut, i.e., the reverse drop), a short signal will be generated by driver 20. This signal will go to the control input of valve 22. At the same time, the signal formation time at the output of block 24, it must be selected so that before it appears, valve 22 has time to close by a signal from shaper 20. Therefore, the pulse from the block will not arrive at trigger 15.

This start signal will be received and highlighted by block 24 of all devices. Since at the time of selection (the end of reception) on all devices except the information transmitter, there is no signal at the output of the driver 20, the signal from the output of the block 24 through the valve 22 will go to the trigger 15 and set it to state A. The signal at the first output will disappear and if a change in the state of the sensors occurs, the signal at the output of the And 16 element does not appear and the device does not start.

After block 25 receives the stop signal, trigger 15 will be reset.

At the same time, upon completion of the signal from the output of the multivibrator 17, the time relay 23 will start. After a specified time (the time is set different for each device), the output signal of the multivibrator 10 will be generated at the relay output, which will form a second start signal transmitted to the line. This signal is the start signal and determines the time (moment) of the beginning of the interrogation of sensors.

At the end of the pulse, the output of the first 10 waiting multivibrator starts the second 11 multivibrator, the pulse from the output of which trips the triggers b of all nodes of the pig 2 to a state in which the first elements And 3 do not pass the signals coming from generator 1. a elements 4 skip. At the same time, the trigger 13 is thrown by the same signal, the output of which closes the valve 12. This eliminates the restart

devices when the state of any of the sensors changes until the end of the complete cycle of information transfer.

The signals from the output of element And 4 of the first polling node are sent to block 5. In this case, a pulse is supplied to the controlled switching element 8 from the output of block 5, the duration of which determines the time during which this element is open and information is read out by signals from the third output of block 5 from the sensor 7 and enters the communication line.

At the end of the specified time, a signal appears at the second output of block 5, which is input to the trigger 6 of the first polling node 2.1.

The trigger rolls over, as a result of which the signal is removed from the output of the second element And 4. And appears at the output of the first element And 3. The pulses of the generator 1 pass through the element And 3 of the first node 2-1 to the inputs of the elements And of the next poll node, the operation of which is similar to that described .

After polling all the information sensors from the output of the And 3 element of the last polling node, a signal will be sent to the multivibrator 16, which will generate a table signal transmitted in line. This signal determines the time (end of transmission).

At the end of this signal, trigger 13 will establish its initial state.

If the sensors changed absolutely simultaneously in two or more devices, then their first start pulses coincide in time and trigger triggers 15 in all other devices, except for their own, because the valve 22 on these devices will be closed by the signal from the driver 20, taking into account that the time of the appearance of the second start pulse at the input of the communication line depends on the time of the appearance of the start pulse at the output of the time relay 23, determined by the priority (number) of the polling device and unique for each of these, it is clearly seen that the second start pulse from only one interrogation device is visible in the communication line. This start pulse will be emitted by all other interrogation devices, their triggers 15 will be set to state O, which will prevent the transfer of any information from these devices to the communication line.

Further, the operation algorithms of the polling device, which sent the second start pulse to the communication line, are similar to the algorithm described above.

Claims (1)

The claims A device for interrogating information sensors, comprising a clock generator, n interrogation nodes, each of which contains serially connected information processing time accounting unit, the first output of which is connected to the first input of the information sensor, and a trigger, the first input of which is also connected to the second input of the information sensor , the first and second elements AND, a switching element, the first and second inputs of which are connected respectively to the first output of the information sensor and the second output of the block for information processing time, the first and second outputs of the trigger are connected respectively to the first inputs of the first and second AND elements, the second inputs of which in the first polling node are connected to the output of the clock generator, and in the second and subsequent polling nodes with the output of the first AND element of the previous node the polling, the output of the second element And each polling node is connected to the input of the corresponding information processing time recording unit, the second inputs of the triggers of all the polling nodes are connected to the output of the first waiting multivibra torus and the first input of the first trigger, the second outputs of the information sensors of all polling nodes are connected to the corresponding inputs of the first OR element, and the outputs of the switching elements are connected to the communication line, while the input of the first standby multivibrator is connected to the output of the second standby multivibrator, and the output of the first trigger connected to the first input of the first key, characterized in that, in order to increase the number of interrogated sensors while maintaining the reliability of information transmission, series-connected the second trigger, the first input of which is connected to the output of the first OR element, and the And element, whose output is connected to the second input of the first key, the output of which is connected to the input of the third standby multivibrator, the output of which is connected to the first input of the second OR element and the input of the time relay, the output of which is connected through the second key in series, the second standby multivibrator and the second OR element is connected to the communication line and the input of the first pulse shaper, the output of which is connected to the first input of the third key the second input of which is connected to the output of the starter allocation unit signal, the input of which is connected to the communication line, to which the input of the stop signal extraction unit is also connected, the output of which is connected to the first input of the third trigger, the second input of which is connected to the output of the third key, the first and second outputs of the third trigger are connected respectively to the second input of the second key and the second input of the And element, and the output of the first And element of the last polling node connected to the input of the fourth standby multivibrator, the output of which is connected to the second input of the second OR element and the input of the second pulse shaper, the output of which is connected to the second input the first trigger, the first input of which is connected to the second input of the second trigger.