SU634292A1 - Object checking arrangement - Google Patents

Description

The invention relates to the field of measurement technology and can be used in the automatic control of the step of slowing down, their lines of traveling wave lamps. A control device is known that contains a register, an adder, a reversible counter, and a switch that allows you to control the magnitude and sign deviation of each trip line 1. The disadvantage of this device is the impossibility of eliminating a systematic error. It is also known a control device comprising a pulse generator, a pulse counter, a divider and logic elements 2. A disadvantage of this device is the impossibility of ensuring continuity of control in the case when the measured step is less than the nominal step. The closest to the technical solution of the present invention is a device for monitoring objects, which contains an element AND, the output of which through the first register is connected to the input of an adder, the output of which is connected to the second register, and a control unit connected to a reversible counter, with the first input of the element AND and co-inputs of the pulse generator and the first com switch connected to the reversible counter and pulse generator 3. The disadvantage of this device is the impossibility of eliminating systematic error caused by the nonstationarity of the average step of the slowing lines, and, as a consequence, the reliability of the control is low. The purpose of the invention is to increase the reliability of control, which is achieved by introducing a switch, pulse distributor, second and third switches and a frequency divider, the input and output of which are connected respectively to the output of the pulse distributor and through the third switch to the input of the first register, the switch input is connected to the output of the first register, and the output with the inputs of the reversible counter and the control unit, one of the outputs of which through the second switch is connected to the input of the adder, the first input of the second The switch is connected to the output of the pulse distributor, and the second input of the second switch is connected to the inputs of the first and third switches and connected to the first input of the device, the first input of the I element is connected to the input of the third switch, and the second input is connected to the inputs of the adder, control unit and the second register and connected to the second input of the device, and the output of the pulse generator is connected to the input of the pulse distributor connected to the input and output of the second register.

The device is shown in the drawing and contains a reversible counter 1, a switch 2, a control unit 3j pulse generator 4, a second 5, a third 6 and first 7 switches, a second register 8, an adder 9, a first register 10, And 11, a pulse distributor 12 and frequency divider 13. The device operates as follows. The control of slowing lines (PL) occurs in three cycles. The task of the first cycle is to measure the length of the PL with no initial technological stretch and the values of the last two steps, that is, the length of the final technological stretch. In the second cycle, the average distance is calculated, in the third cycle, step errors are measured. The SCR scan is performed in the first and third cycles, and the linear displacement sensor produces large-scale pulses that arrive at the first input of the device. To the second input of the device, pulses are given "the start of a step, signaling the end of the previous and the beginning of the next step SL. The up / down counter 1 is designed to calculate the length of the PL. Switch 2 of the step size connects one of the outputs of register 8, depending on the a priori data from the monitored batch PL to the installation input of counter 1. The appearance of a signal at the output of switch 2 means the end of the first cycle. Register 8 is designed to store the values of the output values and in the second cycle performs a subtraction operation with zero indication. The adder 9 in the first cycle stores the code of the penultimate step ZL, in the second it subtracts incoming pulses from the content with zero indication, in the third cycle it measures the errors of the steps. Register 10 measures the value of the current step in the first cycle, counts it in the second, and stores the average step value in the third. The pulse generator 4 generates in the second cycle a burst of pulses, the number of which is equal to the contents of the reversing counter 1.

At the initial moment, the pulse "setting zero writes to the reversible counter 1, included in the subtraction, the maximum step code, according to the position of the switch 2, commands from the control unit 3 prohibit the pulse generator 4, the switches 5, 6, 7 are enabled to skip the pulses of the pulse generator 4, those. there are no pulses at their outputs. When scanning, the pulses "start of the step shift the information to the register 8 from the adder 9, and from the register 10 to the adder 9 after passing the first pulses" the beginning of the step, the number

which are set in the control unit 3, the latter switches the switches 6 and 7 to skip large-scale pulses and remove the prohibition from AND II. Thus, 5 the length of the initial process stretch is excluded from the calculations. The large-scale pulses subtract the contents of the reversible counter 1 to zero, after which the counter I through the control unit 3 switches to

Q summation. Thus, the number in the reversible counter is less than the length of the scanned part of the PL by the value of the initial process stretch and the value of the set maximum step.

In parallel, through the switch 6, the large-scale pulses are fed to the counting input, and the pulses "start of the step through the AND II element to the input of setting the register zero 10. The number of large-scale pulses in the interval between the pulses" is the beginning of the step equal to

0 the size of the real step. Consequently, the value of the past will be rewritten in adder 9, and the previous step in register 8.

When the current step exceeds the value of the maximum step, the signal with

5 switch 2 enters the control unit 3, which switches the switches 6 and 7 to skip pulses from generator 4, prohibits the passage of pulses through AND II, sets "O in the register

8 switches the reversible counter 1 to the subtraction, enables the operation of the generator 4 — the second cycle begins.

At the beginning of the cycle, the number in the counter is equal to the length of the PL with no initial stretch. The number of scale impulses equal to

5 of the maximum step, counted by counter 1 after the last step, is compensated by the micro-operation of subtraction at the beginning of the first cycle. The numbers in the adder 9 and in the register 10 are equal to the values of the penultimate and last steps of the RL.

Pulses from generator 4 are sent to

the input of the distributor 12 and through the first output to the subtracting input of the register 8, after indicating the zero of which the pulses through the switch 5 are fed to the subtracting input

5 adder 9. After subtracting to zero the contents of adder 9, the distributor 12 switches to skip the pulses through divider 13 into register 10. The number of pulses passed through the third output of the distributor 12 is equal to the length of the PL with no initial and final technological stretches.

After the indication of the zero of counter 1, the control unit 3 switches the switch 5 to skip large-scale pulses and disables operation of the generator 4. The large-scale pulses are subtracted in the adder 9 from the average step value and the value of the step error is rewritten in register 8.

Claims (3)

Thus, this device allows to increase the accuracy of calculating the average uiara of the PL and, consequently, the errors of the automatic control. The obtained error values can then be used without intermediate storage and additional recalculation for calculating the validity criterion of the IP, which, along with increased reliability, increases the productivity of the control. The invention The device for controlling objects, containing the element And, the output of which through the first register is connected to the input of the adder, the output of which is connected to the second register, and the control unit connected to the reversible counter, to the first input of the element And and to the inputs of the pulse generator and the first switch connected to a reversible counter and a pulse generator, characterized in that, in order to increase the reliability of the control, a switch, pulse distributor, second and third switch are introduced into it and divide the frequency, the input and output of which are connected respectively to the output of the pulse distributor and through the third switch to the input of the first register, the input defect is connected to the output of the first register, and the output - to the inputs of the reversing counter and the control unit, one of the outputs of which is through the second the switch is connected to the input of the adder, the first input of which is connected to the output of the pulse distributor, and the second input of the second switch is combined with the inputs of the first and third switches and connected to the first input of troystva, a first input of AND gate is connected to the input of the third switch, and the second input of the adder is combined with the inputs of the control unit and the second register and connected kovtoromu entry device, wherein the pulse generator output is connected to the input of the pulse distributor coupled to the input and output of the second register. Sources of information taken into account in the examination: 1. USSR author's certificate number 444049, cl. G 01 B 7/14, 1974. 2. USSR Author's Certificate No. 276522, Ui. G 04 F 11/08, 1969. 3. USSR author's certificate NO 259226, cl. G 06 F 15/46. 1968 ex. g