SU1488973A2 - Arrangement for controlling switching of stanby channels - Google Patents

Description

The invention relates to the technique of communication and automation, can be used in multichannel communication systems and automatic control using backup channels, and is an improvement of the invention by the author. No. 1077071. The aim of the invention is to improve the reliability of the device. The device contains 1-3 comparison units, delay elements 4-6, the element OR 7, the elements AND 8-13. The device connects the average, at the time of occurrence, the signal at the channel output and eliminates the possibility of accidental switching in case of the loss of signals of non-working channels. 1 il.

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The invention relates to communication technology and automation, can be used in multi-channel communication systems and automatic control using backup channels, and is. It is an improvement of the device according to auth. No. 1077071.

The aim of the invention is to improve the reliability of the device by eliminating unreasonable switching of backup channels when the signal disappears from the output of the first triggered, comparison circuit. 15

The drawing shows a block diagram of the device for the three channels.

The device contains blocks 1-3 comparing the first, second and third channels, respectively, elements 20

₍ 4-6 delays, element OR 7, elements AND 8-13, outputs. 14-16 channels, outputs of reference sources 1719, outputs 20-22 of the control device for switching the backup channels. 25

The delay time of the signal elements 4-6 more time inclusion elements And 8-10,

The device works as follows. thirty

When a signal appears on one of the outputs 14–16 and coincides with the reference one at the output of the comparator unit, a signal appears. Let the first signal appeared at the output of block 1 comparison. It will go to the input of the element And 8 and through the element 4 of the delay to the entrance of the element And 11. The signal from the output of the element 8 will go to the inverse inputs of the elements 9-11 and block them. The signal at output 20 will not appear, since

at the input of element 11, it will appear after element 11 is blocked.

Let the second signal appears at the output of block 2 comparison. Since element 9 is blocked, the signal through delay element 5 and element 12 will go to output 21 of the device, from output 21 will block elements 11-13 and go to the input of the element OR 7. The signal from the output of the element OR 7 post to the inverse inputs of the elements And 8-10 and block them. When a signal appears at the output of block 3 of the comparison, the state of the device will not change.

The state of the device will not change even if signals at the outputs of blocks 1 and 3 of the comparison are lost.

The device can be performed for any number of channels. The device connects the average, at the time of occurrence of the signal at the channel output, eliminates the possibility of accidental switching when the signals of the idle channels disappear, thus improving the reliability and stability of the device.

Claims (1)

Claim Device for controlling the switching of backup channels on the auth. No. 1077071, distinguished by the fact that, in order to increase the reliability of the device, an OR element is introduced into it, the inputs of which are connected to the outputs of the second elements AND of all channels, and the output with the third inverse inputs of the first elements AND of all channels.