SU1387004A2 - N-sensors-to-computer interface - Google Patents

Abstract

The invention relates to the field of computers, computers and computers and can be used to enter 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 control block 7, registers 1 and 2, comparison block 3, encoders 5 and 6, 4 clock pulse generator, OR elements 10. With the help of newly introduced OR elements, the possibility of distorting information during input to the processing unit during state changes is eliminated the remaining sensors, which are fixed after the end of the input cycle. 1 il.

Description

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And the invention relates to automation and computing, can be used to enter discrete information from sensors into processing and control devices and is an improvement of the invention according to the author. St. No. I327I14.

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

The drawing shows a functional diagram of the device.

At the first input of the j-ro element And 8 / there is no single signal, therefore at its output, as well as at the output of the remaining elements And 8 there is a signal “O. 5 Since the second input and output of all elements AND, except j-ro, have the same signals - "1 or" O, the outputs of all adders 9, except j-ro, "O, and output j-ro" 1. This signal is fed to the corresponding inputs of the first 5 and second device contains the first 1 and second 2 0 about 6 encoders, which form the code registers, block 3 comparison, the generator 4 addresses of the j-ro sensor and its status code.

clock pulses, the first 5 and second 6 Since the outputs of all elements And

encoders, control block 7, containing-8, starting from the first 8 and up to (j - 1) -th

And 8 elements and modulators 9 modulo 8 () signal "1, then to the second input, elements OR 10, outputs 11 and 12 and dah and outputs of elements OR 10, start input 13 of register 1.c from the first and to (j- 1), also signals «1.

If during the arrival of a pulse from the generator output 4 clock pulses, another one of the sensors, for example the second one, changes its state, then despite

the input of the second element And 82 signal "1 remains, and therefore, the recording information device operates as follows.

The inputs 13 of register I are given signals of the state of the sensors, which are recorded in the corresponding bits of register 1. In the corresponding bits of register 2 20, the output of block 3 of the signal

Recorded prior sensor states. From the outputs of the first 1 and second 2 registers, signals are fed to the inputs of the first and second groups of comparison unit 3. If the same signals are received at the same inputs of the first and second groups of the comparison block 3 (the sensor state has not changed), there is a single potential at the corresponding output of the block 3 if the different is zero.

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The status of the J-ro sensor continues until the clock pulse from the 4-clock generator ends.

At the end of the clock pulse, a negative differential is recorded in the jth cell of the second register 2 of the new sensor state, with the result that on the J-M output of block 3 there appears "1. With

These signals arrive through the elements following the clock pulse in a similar way.

OR 10 to the first inputs of the elements AND 8. To the second input of the first element AND 8i signals from the generator 4 clock pulses. The duration of the clock pulses is determined by the time required to write information to the computer memory. .

For example, when the state of the sensor j-ro changes, the signal "O" appears on the J-M output of block 3, and on the remaining outputs there is a signal "1." These signals come to the first inputs of the corresponding elements And 8.

When entering the input, the first element And 8 | The signal "1 second generator 4 clock pulses unit potential appears at the outputs of all elements And 8, starting with the first 8i and up to (j - 1) -th element I.

The state of the next sensor, which changes its state, in this case, the second, is read, after which the device returns to its original state.

Claims (1)

Invention Formula A device for interfacing n sensors with a computer by bus. St. No. 1327114, characterized in that, in order to increase the reliability of 40 input information, (p-1) OR elements are entered into the device, the first inputs of which are connected to the | outputs of the comparison unit (jl, p-1), and the outputs are connected to the first inputs jx of the elements AND, the second inputs of the elements OR are connected to the outputs jx of the elements AND, respectively. The status of the J-ro sensor continues until the clock pulse from the 4-clock generator ends. At the end of the clock pulse, a negative differential is recorded in the jth cell of the second register 2 of the new sensor state, with the result that on the J-M output of block 3 there appears "1. With next clock pulse is similar The state of the next sensor, which changes its state, in this case, the second, is read, after which the device returns to its original state. Invention Formula A device for interfacing n sensors with a computer by bus. St. No. 1327114, characterized in that, in order to increase the reliability of the 0 input information, (OR) elements are introduced into the device, the first inputs of which are connected to the outputs of the comparison unit (jl, n-1), and the outputs are connected to the first inputs jx of the elements AND, the second inputs of the elements OR are connected to the outputs jx of the elements AND, respectively.