SU830481A1 - Information transmitting and receiving device - Google Patents

Description

(54) DEVICE FOR TRANSFER AND PRE-INFORMAPY

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The invention relates to telemechanics and can be used to exchange information in automated control systems.

A device is known for transmitting and receiving information, comprising, its transmitter, whose information outputs are connected to information channels, and reception-. nick 1.

However, this device has low noise immunity with simultaneous and identical distortion of the forward and inverse sync signals.

The closest in technical essence to the proposed invention is a device containing direct inverse sync channels, AND elements and half adder, information channels connected to the first inputs of AND elements, whose outputs are connected to the receiver inputs, the output of which is connected to the input through a feedback channel transmitter, sync outputs of the transmitter in black: with direct and inverse sync channels connected to the inputs of the half adder, the output of which is connected to the second inputs of the elements and to the synchronization input receiver.: the output of the direct sync channel is connected to the third input of the And 2 elements.

This device has insufficient immunity in the event of a two-pole interference, simultaneously in all non-transmitting channels, including in the channels of sync signals.

The purpose of the invention is to improve the noise immunity of the device by increasing the reliability of the transmitted information.

This goal is achieved in that a device for transmitting and receiving information containing a transmitter, the synchronization output of which is connected via the synchronization channel to the corresponding input of the main receiver, whose information input is connected to the information channel, has an additional receiver, a comparison unit, an active generation unit the pauses and the return information channel, the information and control outputs of the transmitter are connected to the corresponding inputs of the block forming an active pause, the output of which is connected to the information channel, the synchronizing output of the transmitter is connected to the synchronizing input of the additional receiver, whose information input is connected to the information input of the main receiver through the reverse information channel, the control outputs of the transmitter and the additional receiver are connected to the control inputs transmitter and additional receiver.

The drawing shows a functional diagram of the proposed device.

The device contains information channel 1, synchronization channel 2, receiver 3, additional receiver 4, comparison unit 5, active pause generation unit 6, transmitter 7, reverse information channel 8.

The device works as follows.

Before the start of information transfer, a high level signal is set at the information output of the transmitter 7, which unlocks the active pause generation unit 6, which for the main receiver 3 and the auxiliary receiver 4 is the signal for the start of information transfer. Information signals synchronized on sync channel 2, passage through block 6 information channel 1 and additional information channel 8 arrive at the input of the main receiver 3 and additional receiver 4.

If there is no difference in the information transmitted by transmitter 7 and received by additional receiver 4, the low level signal from the output of comparison unit 5 does not change its state. After the transmission of information has been completed, a low level signal appears at the information output of the transmitter 7, which blocks the active pause block 6 for passing information.

If the information channel 1, the reverse information channel 8 and the sync channel 2 are affected by interference, the additional receiver 4 and the main receiver 3 receive it, and a high level signal is generated at the output of the comparison unit 5, signaling the presence of interference, received signals. This signal, arriving at the control inputs of the additional receiver 4 and transmitter 7, brings them to the initial state.

A low level signal appears at the control output of the transmitter 7 for some time, which is fed to the input of the active pause generation unit 6 and blocks the transmission of information. After a certain time (individually determined), this signal is removed and the transmission of information begins with the original.

The proposed device allows a sub- “EXCLUDE” error from any interference in the transmission of information, which is especially important in control systems, and also increases the noise immunity of the device for transmitting information from external electric and magnetic impulse fields.

Claims (2)

1.MECL. “System design handfoor motorola 1971, p. 65-67. 2. USSR author's certificate No. 611240, cl. G 08 C 19/16, 1975 (prototype).