SU1642493A2 - Data transmission system - Google Patents

Abstract

The invention relates to telemechanics and can be used in the transmission of information from sensors separated by considerable distances, and is an improvement to the device by author. No. 930334. The purpose of the invention is to increase the reliability of the transmitted information. The transmission system consists of monitored items, each of which contains n sensors 1, primary information converter 2, linear signal receiver 3, information input unit 4, linear signal generation unit 5, clock signal detection unit b, clock signal delay unit 7, linear detection unit 8 signal, pulse generator 9. block 10 of the sync signal generator, block 11 of the synchronization by data formats, element 12, block 13 of the permission to issue a sync signal, element OR 14, block 15 of the coding. The system allows to increase the reliability of transmission, especially in systems with a large number of controlled points, due to double provarka of the sign of the transmitted information. 1 il.

Description

The invention relates to the transmission of information from sensors and groups of sensors spaced apart over considerable distances, and can be used in acoustic, hydraulic, seismic, and other telemetry systems.

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

The drawing shows a block diagram of the controlled point of the system (all controlled points are identical).

The controlled point consists of n sensors t, primary information converter 2, linear signal receiver 3, information input unit 4, linear signal generation unit 5, clock detection unit 6, clock delay unit 7, detection unit 8

a linear signal, a pulse generator 9, a sync signal generating unit 10, a synchronization unit 11 by data formats, an AND 12 element, a sync signal output resolution unit 13, an OR 14 element and a coding block 15.

The system works as follows.

From sensors 1 of each controlled point to the primary converter 2 analog signals are received. The linear signal from the communication line through the receiver 3 is fed to the input of the information input unit 4, the input of the sync signal detection unit 6 and the input of the synchronization unit 11 by data formats, which at the time of synchronism with the data formats produces a signal received through the IL AND 14 element 12 and the block 13 of the resolution of the issuance of the sync signal and the enabling off

Letting the clock signal from the output of the clock detection block b through the block 13 for outputting the clock signal to the input of the delay unit 7 and passing through the And 12 signal of the signal produced by the clock detecting unit 6 to the input of the primary converter 2 information, which is connected to the primary converter 2 of the next sensor 1 and at the same time the output of data from the primary information converter 2 is permitted through the encoding unit 15 to the information input unit 4.. In block 7 of the delay of the sync signal, the signal is delayed by the time of data output from the primary converter 2 through the encoding unit 15 and then entered into the line following the last clock of the data signal through the linear signal generating unit 5, and the process is repeated at the next controlled point.

Thus, the signals generated by the sync signal detection unit b, when spurious sync signals generated at the interfaces of the adjacent data transfer formats appear in the stream, do not pass to the inputs of the primary information converter unit 2 and the delay unit 7, since the resolution signal produced by unit 11 synchronization of data formats, it appears only at the moments of synchronization of data formats, as a result of which the probability of system failures decreases and the accuracy of information transmission increases (the error ratio decreases ibok)

To synchronize the operation of blocks 4,5, 6 and 11, they are supplied with a clock signal from the special output of receiver 3 of the line signal. When the right-far controlled point that produces the clock signal fails, the linear signal detection unit 8 of the previous controlled point generates a signal to turn on the generator of 9 pulses, which supplies a clock frequency signal through the clock generation unit 10 to the input of the linear signal receiver 3. In addition, the signal from the output of block 8 detection of a linear signal is fed to the input

element OR 14 and at its output by V. l. em-s the resolution signal regardless of whether there is a synchronization signal on the data formats at its other input or not.

Thus, when the monitored item is operating in the right-most mode, synchronization over the data formats in it is blocked. The encoding unit 15 matches the signals from the output of the primary converter 2 (source alphabet) with the information transmission channel (channel alphabet) by recoding the signals of the primary converter 2 information.

The device allows to improve the fidelity of information transfer (to reduce the error rate), especially in information transfer systems with the number of controlled points several tens and above,

Claims (1)

Invention Formula Information transmission system by aut. St. No. 930334, characterized in that, in order to increase the reliability of information transfer, in each controlled item entered coding unit, which is connected by input and output, respectively, between the output of the primary information converter and the third input of the information input unit, the sync signal issuance resolution unit, connected between the second output of the sync signal detection unit and the input of the delay unit with its first input and output, respectively, And element, first which input and output connected to the first output of the sync signal detection unit and the input of the primary information converter, respectively, with its first input and output, respectively, the IL-AND element, the synchronization unit by data formats, the first and second inputs of the latter are connected respectively to the first and second outputs of the linear signal receiver, and the output is connected to the first input of the element OR to the second the input of which is connected to the output of the linear signal detection unit, the output of the OR element is connected to the second inputs of the sync signal release unit and element I.