SU1377829A1 - Device for checking parameters - Google Patents

Abstract

The invention relates to an automated control technique and can be used in control systems for a large number of parameters of complex objects. The purpose of the invention is to increase the reliability and speed of the device by creating a flexible time interval for polling parameters. The device contains N sensors 1 monitored parameters, N first 9 and N second 10 registers of storage of lower and upper values of monitored parameters. Sensors 1 and registers 9 and 10 are connected to comparison units through switches 2, 7 and 8. Switches are controlled by decoder 3 and counter 11. Counter switching is performed by pulses formed by AND 14 and Element 13, depending on the state the outputs of the comparison blocks 5 and 6. The device also has dials 16 and 20 for the number of the start and end channels for polling. The device allows control of any selected parameter group. 1 il. e

Description

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I am an inventor of measurement technology and can be used in automated systems for monitoring an object with a large number of parameters, for example in nuclear engineering and boiler building when monitoring parameters of nuclear reactor protection control systems.

The purpose of the invention is to increase the reliability and speed of the device by providing a flexible time interval for polling parameters

The drawing shows the functional diagram of the device.

The device contains N sensors 1 monitored parameters, the first switch 2, the decoder 3, the buffer memory unit 4, the first 5 and second 6 comparison blocks, the second 7 and third 8 switches, N first 9 and N second 10 registers, counter 11, block 12 indication, the first element AND 13, the element AND-NOT 14, the element EXCLUSIVE OR 15, the setting unit 16 of the channel of origin of the reference, the input 17 (button) control the recording of the counter 11, the second element And 18, the comparator 19, the setting device 20 of the channel of the end of the survey. The device works as follows.

After switching on the device and resetting the counter 11 in O by applying a signal 1 to the input R of setting the counter to 0, none of the registers 9 and 10 are connected to the comparison units and none of the sensors are connected to the buffer storage unit 4. Therefore, the first inputs of blocks 5 and 6 of the comparison, to which the code of the lower and upper values of the monitored quantity is applied, remain open. At the same time, at the output of block 4 of the buffer memory there is a signal of zero level, since its input is a zero signal. The design of blocks 5 and 6 provides a preliminary conversion to the additional code of the lower tolerance of the measured parameter from register 9 and the monitored parameter from block 4 of the buffer memory, respectively. Consequently, at the output of the comparison unit 5 there will be a level O, and at the output of the unit 6 of comparison 1 and at the output of the element AND-HE 14 and the direct counting of the counter 11 associated with it is level 1.,

If there is a single signal at the input of the direct count of the counter 11, the channel number g of the poll is set. The channel number of the beginning of the survey can correspond to 1 or any other number in the volume of the meter capacity. The channel number is set by setting the appropriate number on the setpoint switch 16 and writing this value to the inputs D in the counter by applying a zero pulse to the input C of the preliminary recording of the counter 11

15 by pressing the button 17 (by the operator).

The signals generated by the counter 11, are fed to the input of the decoder 3, which produces a signal to

0 one of its outputs depending on the input code.

From the output of the decoder 3, the clock pulses go to the control inputs of switch 2, which ensures the transfer of one of the monitored parameters to its information inputs from sensors 1 to the input of block 4 of the buffer memory.

0 sequential counting of the value of the monitored parameter into a digital code and feeds the inputs of blocks 5 and 6 of the comparison. In addition, at the end of the conversion, block 4 generates

5 signal 1 at another output, indicating that the conversion of a signal to a digital code is made:.

0 From the output of the decoder 3 signal

It also goes to the control inputs of the switches 7 and 8, which feed the corresponding lower and upper allowable values of the controlled parameter to the inputs of the blocks 5 and 6 of the comparison. In addition, at the end of the conversion, block 4 generates a signal 1 at another output, indicating that

Signal conversion to digital code is performed.

From the output of the decoder 3, the signal also goes to the control inputs of the switches 7 and 8, which produce the supply of the corresponding lower, their and upper allowable values of the controlled parameter to the inputs of the comparison blocks 5 and 6.

Comparison unit 5 subtracts the value of the lower tolerance from the value of the measured value.

Comparison unit 6 calculates the measured value from the upper tolerance value. Therefore, if the monitored value is normal, then both comparison units, subtracting the smaller value from the larger one and at the transfer outputs of both units 5 and 6, the signal will be 1.

In case of compliance with the norm, the outputs of blocks 5 and 6 of the comparison are set to 1. At the same time, the output of the element AND-NOT 14 and the element And 13, as well as the input of the direct counting of the counter 11 connected with it, is set to level O.20

After a time determined by time. It triggers an element of AND 13, from its output to the first input of element 14 AND- NOT receives the signal O and sets the output of element 14 AND-NOT to 1. Signals from the output of element AND-NOT 14 arrive at the input of the direct counting counter. 11 and at the moment of the signal transition from O to 1, it is switched, while the decoder 3 produces the connection of the next monitored parameter.

Thus, the switching of the monitored parameters is carried out by signals arriving at the input of the direct count of the counter 11 of the comparison blocks 5 and 6, formed by the elements 14 AND-NOT and 13 I.

When measuring a parameter with deviations from the norm, the output O will be at the output of one of the n blocks 3 or 6 of the comparison. At the same time, the output of the 14-AND-NOT element stores the value 1 and the input of the signal from 1 to O 5 at the input of the counting counter 11 not happening. At the output of the element EXCLUSIVE OR 15, a signal appears. 1, which is fed to the control of the NCI input of the display unit 12, which highlights the parameter number with a deviation from the norm.

The device provides operation in the mode of setting the number of controlled parameters. In this case, the number of the parameter being monitored is set on the switch of the setting device 20. At the moment of the appearance at the output of the comparator 19, a signal 1 appears, which is

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It goes to one of the inputs of the second element 18 I.

After arriving at the second input element AND 18 of signal 1, appearing at the output of element 14 AND-NOT after the control of the last specified parameter has ended, the output of element 18 AND signal 1 appears, which is transmitted to the input R of the installation of the counter 11 to O. further circuit switching stops.

Claims (1)

Invention Formula A device for controlling parameters, comprising a counter, the output of which is connected to the input of the decoder, N outputs of which are connected to the corresponding N control inputs of the first switch and display unit, N sensors whose outputs are connected to the corresponding N information inputs of the first switch, the output of which is connected to input the buffer memory block, the first and second comparison blocks, the N first and N second registers, the first and second elements AND, characterized in that, in order to increase the reliability and speed of the device and by providing a flexible time interval for polling the monitored parameters, the second and third switches, the NAND element, the EXCLUSIVE OR element, the comparator, the unit for starting the channel for polling and the unit for the channel for ending the poll, whose output is connected to the first input of the comparator connected the second input with the output of the counter, and the output with the first input of the second element I, the second input. which is connected to the output of the NAND element, the first input of the first element I and the input of the direct count of the counter, the output of the second element I is connected to the input of the installation in About the counter, the second input of the first element I is connected to the first output of the buffer memory block, and the output to the first input of the element IS-NOT, the second and third inputs of which are connected to the outputs of the first and second comparison blocks, the first inputs of which are connected to the second output of the buffer memory block, the inputs of the key switch OR or the outputs of the comparison blocks, and output - with control input of the display unit, output 513778296 master channel number divers whose start-up inputs are connected interrogation connected to the installation j outputs of the decoder, outputs N Dami counters, second inputs of the first and N second registers; connections of the second comparison unit are connected with N information inputs to the outputs of the second and third go and third switches, N up switches.