SU1223412A2 - Device for polling information sensors - Google Patents

Abstract

The invention relates to radio engineering. In relation to the main author. St. t 873466 provides increased reliability of information transfer. The device contains a clock pulse generator (GTI) 1, n nodes

Description

H is related to radio engineering, in particular, to systems for automatically polling information sensors in the on-line processing of information, and is an improvement on the device by the author. No. 873D66.

The aim of the invention is to increase the reliability of information transfer.

The drawing shows a block diagram of a device for interrogating information sensors.

The device contains a clock pulse generator and n polling nodes 2-1 - 2-Pz each of which consists of the first and second elements I 3 and 4, respectively, the information processing time accounting unit 5, the controlled switching element 6, the information sensor 7, the additional control switchable element 8, trigger 9, converter 10, first and second standby multivibrators 11 and 2, respectively, key 13, reset bus 14, link 15, additional trigger 16.

The device works as follows. In the initial state, when none of the information sensors 7 have any information and no polling is performed, the triggers 9 of all nodes 2 polling are in such a state that the enabling signals from them are fed to the inputs of the second And 4 elements and are not fed to the inputs the first elements And 3. As a result, the second elements And 4 of all nodes 2 of the survey pass pulses coming from generator 1, and the first elements And 3 do not pass, so from the output of the first element And 3 of each polling node the pulses do not enter the input of block 5 of the corresponding node 2 survey. The signals at the output of block 5 of each node 2 interrogation are absent, controlled switching elements 6 are closed. In the absence of a signal at the output of the information sensor 7 of each polling node 2, there is no signal at the output of the converter 10, the additional controlled switching commutator T 8 is also closed and no signals are sent to the communication line 15. An additional trigger 16 pulses from the output of generator 1 is set to the zero state.

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there is no signal to his Biifxone and the keys of 3 all nodes 2 polls are open.

Upon the appearance of information (state change) at the output of the information sensor 7 of any polling node 2, a signal appears at the output of converter 10, and therefore, at the input of the first standby multivibrator P and at the control input of the additional controlled switching element 8 of the corresponding node 2 survey. The additional switching element 8 is opened, and the pulse generated by the first waiting multivibrator 11 via the public key 13 and the additional switching element 8 enters the communication line 15. This impulse is the starting one and determines the time (moment) of the beginning of the polling of the information sensors 7. At the end of the impulse, the output of the first waiting multivibrator 11 triggers the second continuous multivibrator 12, the pulse on which is triggered. This impulse overturns the triggers 9 of all nodes 2 polling in such a state that the second elements 4 do not pass the signals coming from oscillator 1. This same 1-5 pulse goes to the second input of the additional trigger 16, the latter is thrown into one state and at its output, a signal appears that closes the keys 13 of all nodes 2 polling.

In this way, if during the polling a change in the state of any information sensor 7 occurs and a starting pulse is formed, it will not enter communication line 15 and will not distort the transmitted information. A signal from the output of the first element FROM the first node 2-1 of the interrogation is fed to the input of unit 5. At the same time, a controlled pulse element 6 from the output of block 5 receives a pulse, the duration of which determines the time during which this element is open and information if it is, from the information sensor 7 of the first polling node 2-1 enters 15 communications. At the end of the specified time (pulse), a signal appears at the additional output of block 5, which enters the trigger input 9 of the first polling node 21, the latter tilts, as a result of which

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the signal from the input of the first element And 3. and a signal appears at the input of the second element AND 4, as a result, the pulses from the generator 1 through the second element AND 4 of the first polling station 2-1 arrive at the first and second elements And 3 and 4 of the next polling node, whose operation is similar to that described.

After polling all information sensors 7 from the output of the second element AND 4 of the last node of the 2-n polling, the signal arrives at the trigger 16, which overturns, the signal at its output disappears, the keys 13 open and the device returns to its original state.

Claims (1)

Invention Formula A device for polling information sensors on the author. St. No. 873466, characterized in that, in order to increase the reliability of information transfer, a key is inserted into each interrogation node connected between the output of the first waiting multivibrator and the second input of the additional controlled switching element, and the control inputs of the keys are connected to the output of the added additional trigger setting and the fault inputs 1 are connected respectively to the reset bus and the output of the second element AND of the last polling node.