SU1541588A1 - Information input device - Google Patents

Abstract

The invention relates to the field of automation and can be used as part of automated measuring systems for various purposes. The purpose of the invention is to increase the reliability of the input information and speed. This is achieved by ensuring the use of the entire scale of the analog-to-digital converter and eliminating the digital transformation of the measurement results. The device contains a switch 2, blocks 3 and 4 of the selection of maximum and minimum signals, amplifiers 5 and 6, analog blocks 7 and 8 of memory, a digital-to-analog converter 9 and a delay element 10. 1 il.

Description

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The invention relates to the field of automation and can be used as part of automated measuring systems for various purposes, in particular as part of measurement systems for statistical parameters of various processes.

The purpose of the invention is to increase the speed of the device and the reliability of the input information.

The drawing shows a block diagram of the device.

The device contains p sensors 1, switch 2, block 3 for selecting the maximum signal, block 4 for selecting the minimum signal, first and second amplifiers 5 and 6, first and second analog blocks 7 and 8 of memory, analog-to-digital converter 9 and element 10 delays.

The device works as follows.

The signals from the outputs of sensors 1 are fed to the inputs of the maximum signal selection block 3, to the inputs of the minimum signal selection block 4 and to the information inputs of switch 2, the state of which (the address of the selected input) has a random value at the initial moment.

Suppose that at some point in time the signal at the output of the sensor

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minimum value. At the same time, the output of the maximum signal selection unit 3 and the output of the minimum signal selection unit 4 are set to the corresponding voltages supplied respectively to the inputs of the amplifier 6, the output of which produces a voltage equal to the difference between these signals and the input to the analog memory unit 8 . In this case, suppose that the signal at the output of block 8, which is fed to the input of the reference voltage of the analog-digital converter 9, at this moment is equal to the voltage at its input.

The voltage from the output of switch 2, which in this case has a minimum value, since switch 2 is connected to the output of sensor 1 (1, is fed to the input of amplifier 5, to the second input of which voltage is supplied from the output of the minimum signal selection unit 4). the output of amplifier 5 is formed zero at

1, has the maximum value, the signal at the output of the sensor 1h has

The voltage applied to the input of the analog memory block 7, the output voltage of which in the initial state can also have a zero value, which causes a zero voltage at the information input of the analog-digital converter 9.

At the appropriate time from the start input of the device to the input of the analog-digital converter 9, a pulse arrives, initiating the analog-digital conversion process, after which, at the information outputs of the analog-digital converter 9, a n-bit binary code of a certain number is formed, in this case the number Oh, coming to the informational outputs of the device. The impulse from the ready output of the analog-digital converter 9 enters the ready output of the device and introduces information on the relative value of Vr to the external computer in the form of a binary ha-bit code, the statistical spread of the sensor signal 1h with an error of not more than

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In addition, the pulse from the ready output of the analog-digital converter 9 is fed to the input of the delay element 10 and to the control input of the switch 2, transferring it to the next state, in this case, the state 01. At the same time, through the switch 2, the input of the amplifier 5 the sensor signal 1, as a result of which the state of the amplifier 5 is accordingly changed. Upon expiration of the delay time at the output of element 10, a pulse arrives at the control inputs of blocks 7 and 8 and changes the state of their outputs, which leads to a change in the signals at the information input and at the input voltage of the analog-digital converter 9.

The next pulse from the start input enters the control input of the analog-digital converter 9 and initiates a new conversion cycle, as a result of which the following number is formed at its information outputs and at the device outputs, in this case the number 1 ... 11 recorded by an external device

readiness signal at the output of the analog digital converter 9.

Subsequently, the device operates in a similar way, polling with the help of switch 2 the state of sensors 1 and forming m-bit numbers Z at its outputs, which enter the external device.

Claims (1)

Invention Formula An information input device comprising a switch, a first amplifier, a first analog memory block and an analog-to-digital converter, the information inputs of the switch are information inputs of the device, the switch output is connected to the first input of the first amplifier, the output of which is connected to the information input of the first analog memory block The output of which is connected to the information input of the analog-digital converter, the information outputs of which are the information outputs of the device, differing luminant in that, in order to increase bystrodeyst0 five 0 five device and the reliability of the input information, the minimum and maximum signal selection blocks are entered, the second amplifier, the second analog memory block and the delay element, the minimum and maximum signal selection block inputs are connected to the device information inputs, the minimum signal selection block output is connected to the second the inputs of the first and second amplifiers, the output of the maximum signal selection unit is connected to the first input of the second amplifier, the output of which is connected to the information input of the second an analog memory unit, the output of which is connected to the input voltage reference voltage of the analog-digital converter, the control input of which is the control input of the device, and the readiness output of the analog-digital converter is the output of the device readiness and is connected to the control input of the switch and through a delay element with control inputs of the first and second analog memory blocks.