SU402900A1 - DEVICE FOR RECEIVING DISCRETE SIGNALS - Google Patents

Description

one

The proposed device relates to the field of telemechanics and is intended for use in the input circuits of information collection and processing systems in which the number of channels is relatively large.

There are known devices for receiving discrete signals containing a one-shot, the output of which is connected to the signal input of the first and with a control input of the second keys, a trigger, whose inputs are connected to the outputs of the keys, a logical element "OR, the output of which is connected to the input of a single vibrator and with a control input first key, valve blocks, register, descrambler.

However, the known devices in the presence of a large number of information channels acquire a rather complex structure, which greatly reduces their reliability.

The proposed device is characterized in that it comprises an encoder, and its outputs are connected to the input of the OR gate and to the control inputs of the first gate unit, the outputs of which are connected to the information inputs of the register; the outputs of the register are connected to the input input.m of the decoder, the outputs of which are connected to the inputs of the second valve block; the signal input of the first valve block is connected to the one-shot output, and the signal input of the second valve block and the register reset input are connected to the trigger output.

This makes it possible to use a single memory trigger for the entire channel group, i.e., greatly simplify the device and improve the reliability of its operation. The drawing shows a block diagram of the proposed device, which contains the encoder 1, the logical element OR 2, the one-shot 3, the keys 4, 5, the trigger 6, the valve blocks 7, 8, the register 9, the decoder 10. The information signals are supplied to the terminals

111 PP and the readout signal to terminal 12. The device operates as follows. In the initial state, the voltage at the output of the one-shot 3 holds open the key 5, through which the read pulses set the trigger 6 to the zero position. In this case, register 9 is also in the zero position.

The information signal arriving at one of the HI-Ib input terminals through the encoder 1 and the logical element OR 2 starts the one-shot 3 and opens the key 4. At the same time, the output of the encoder appears signals corresponding to the binary code of the input meter, which opens The corresponding valve is in the valve block 7.

Odiovibrator 3, triggered from the input signal, closes the plug 5, preparing the input circuit of the trigger 6 to write to it units.

When the one-vibrator returns to its initial state, the falling edge in the trigger 6 is through the public key 4, and the register 9 is entered through the corresponding open valve of the valve unit 7, the binary code of the input number, but to which the information signal is received.

It should be noted that the recording of information in the trigger 6 and the register 9 will occur only if the duration of the input signal is longer than the time delay of the one-shot 3. In the case of the start of the one-shot interference, the duration of which is less than its time delay, recording information in the trigger 6 and register 9, since the switch 4 and the selected valve of the valve block 7 are closed by the moment the one-shot pulse ends due to the disappearance of the false input signal.

This is carried out by suppressing short-term impulse noise and interference such as chattering of electromechanical contacts of information sensors.

The binary code recorded in register 9 arrives at the decoder 10, from the output of which a unlocking signal is supplied to one of the control inputs of the valve unit 8, corresponding to the input number to which the information signal was fed.

After returning the one-shot 3 to the initial state with some delay.

determined by the duration of its own transient processes, opens the key 5. The next read impulse goes to trigger 6 and resets it. In this case, the signal from the trigger output is directed through the corresponding open valve of the valve unit 8 to the output of the device.

Subject invention

A device for receiving discrete signals containing a single vibrator, the output of which is connected to the signal input of the first

and with the control input of the second keys, the trigger, the inputs of which are connected to the outputs of the keys, the logical element "SLI, the output of which is connected to the input of the one-shot and the control input of the nerve key, valve blocks, register, decoder, characterized in that increase the reliability of the device, it contains an encoder, and its outputs are connected to the input of the logic element "SLI and to the control inputs of the first valve block, the outputs of which are connected to the information inputs of the register, the outputs of the register are connected to the inputs of the decoder, the outputs of which are connected to the control inputs of the second valve block, the signal input of the first valve block is connected to the one-shot output, and the signal input of the second valve block and the register reset input are connected to the trigger output.

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