SU1387003A2 - N-sensors-to-computer interface - Google Patents

Abstract

The invention relates to the field of automation and computer technology and can be used to input discrete information from sensors into processing and control devices. The aim of the invention is to increase the reliability of the input information. The device contains a control unit 7 consisting of elements of AND 8 and modulators 9 modulo two, registers 1 and 2, encoders 5 and 6, a generator of 4 clock pulses, trigger 10, block 3 comparisons. Improving the reliability of the input information is achieved by coordinating the operation of the device with the EV. C. 1 Il.

Description

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The invention relates to automation and computing, can be used to input discrete information from sensors into processing and control devices and is an improvement of the invention according to the author. St. No. 1327114.

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

The drawing shows a functional diagram of the device.

The device contains the first 1 and second 2 registers, the comparison block 3, the 4 clock pulse generator, the first 5 and the second 6 encoders, the control block 7 containing AND 8 elements and adders 9 modulo two, the trigger 10, and also the inputs and outputs 11 -15 devices.

The device works as follows.

The inputs 13 of register 1 are supplied with the status signals of the sensors, which are recorded respectively into the bits of the register 2, at the outputs of which the signals appear "1. In the bits of the second register 2, the previous states of the sensors are recorded. From the outputs of the first 1 and second 2 registers, the signals are fed to the inputs of the first and second groups of block 3. If the same signals are present at the same inputs of block 3, then the corresponding output of block 3 contains the signal ". If different, the signal is" O.

The operation of the device is considered on the example of a change in the state of the j-ro sensor.

When the state of the j-ro sensor changes, the signal "O" appears on the J-M output of block 3 (on the remaining outputs, signals "1"). Upon receipt of a permission signal from the computer at the input 14 to read information from the sensors, the trigger 10 is set to the state "1" and the signal from its output goes to the 4-clock pulse generator, and starts it. The signals from the generator output 4 clock pulses begin to flow

0

to the input of block 7 (the inputs of the first element And 8 and the first adder 9i). Since the first inputs of the And 8 elements, besides the j-ro, have the signals "1, then the outputs

of all the elements of And from the first to (j - 1) -th signals “I, and from the y-th to the n-th signals“ O. Since at the second input and output of all elements AND, except for j-ro, there are identical signals, then on all but the th of the adders, "O, and at the output of j-ro, the signal" 1. This signal is fed to the first inputs of the first 5 and second 6 encoders, which form the machine code of the j-ro address of the sensor and its state.

At the end of the clock pulse, a negative differential is recorded in the jth cell of the register 2 of the new state, as a result, the signal "1." Appears at the jth output of block 3. If none of the sensors work anymore, then when the next pulse arrives from the generator 4

0, a signal appears at the output of the last element, And 8. This signal throws trigger 10 into the initial (zero) state and enters the computer, signaling the end of the information input cycle. The signal from the output of the trigger 10 ceases to flow to the generator 4, which stops, and the device returns to its original state.

Claims (1)

Invention Formula Q A device for interfacing n sensors with a computer by aut. St. No. 1327114, characterized in that, in order to increase the reliability of the input information, a trigger is introduced into the device, the reset input of which is connected to the output of the last element AND 5 and is the device sync output, the trigger setup input is the device sync input, the trigger output is connected to the gene start input. rrator. five