SU1364969A1 - Device for checking lengthy articles - Google Patents

Abstract

The invention relates to the field of non-destructive testing and can be used in the design of welded joints of long products when controlled by eddy current methods. The aim of the invention is to increase the reliability of control by analyzing the number and type of defects. Pulse sensor 7 of the meter registers the speed of movement of the control object and, when it reaches the specified speed, causes switching of the fixed memory block 12, which zeroes all the counters and starts timer 21 allowing the operation of the circuits 17, 18, 19 to match. Comparators 4, 5, 6 are tuned to successively increasing amplitudes of signals, the number of which is recorded in counters 9, 10, 11, respectively. When the specified number of units reaches 13, 14, 15 fixed memory, one of the 17-19 coincidence schemes triggers . When any higher matching scheme is triggered, the low order is blocked. 1 il. sl 00 Od 42 O CO

Description

The invention relates to the field of non-destructive testing by eddy-current methods and can be used to control and sort out welded joints of long products.

The aim of the invention is to increase the reliability of control by analyzing the number and type of defects.

The drawing shows a block diagram of a device for monitoring extended defects.

The device contains a generator 1 connected in series, a vortex converter 2 and an information processing unit 3, three comparators 4-6 connected to the output of the information processing unit 3, a pulse meter 7 in series and a counter 8 connected in series, three counters 9-11 connected respectively to the outputs of comparators 4-6, four blocks of 12-15 fixed memory, connected respectively to the outputs of counters 8-11, the circuit OR 16 connected to the outputs of block 12 of the permanent memory, three circuits 17-19 matches, the first inputs of which are connected With the output of the fixed memory unit 12, the output of the coincidence circuit 19 is connected to the fourth inputs of the matching circuits 17, 18, the output of the coincidence circuit 18 is connected to the fifth input of the matching circuit 17, and the third inputs of the circuits 17, 18 and 19 are connected respectively to the outputs blocks 13, 14 and 15 of the persistent memory.

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In addition, the device has a fourth coincidence circuit 20, the input of which is connected to the code of the permanent memory unit 12, timer 21, the input of which is combined with the fifth inputs of the fixed memory units 13-15 and connected to the fifth output of the constant unit 12 memory, and RS-flip-flop 22, the first input of which is combined with the third inputs of counters 9-11 and connected to the second output of the fixed memory unit 12, the second input connected to the output of the matching circuit 20, and the output connected to the third inputs of the circuits 17- 19 matches.

Third counter inputs 9-11 connect

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The device works as follows.

The signals from the pulse sensor 7 of the meter are fed to the counter 8, which controls the operation of the fixed memory unit 12. After the first pulse, counters 9-11 are zeroed and timer 21 starts.

The signals about the quality of the product from the output of the information processing unit 3 are sent to comparators 4-6, the operation levels of which sequentially increase. In normal operation, only the comparator 4 is triggered, which triggers the counter 9. When the specified value is reached, the counter 9 is stopped by the fixed memory unit 13, and the logical unit signal is fed to the input of the matching circuit 17.

Counters 10, 11 and blocks 14, 15 of the permanent memory work in a similar way, forming permitting signals in coincidence circuits 18 and 19, with higher noise levels. Timer 21 switches the RS-flip-flop 22 through the matching circuit 20, enabling the matching circuits 17-19 to match at the rated speed of the item being monitored (not indicated).

When the counters 10 and 11 are operated and they reach the maximum permissible level of the triggering signals, the coincidence circuit 19 blocks the matching circuits 18 and 17, and when the coincidence circuit 18 operates, the coincidence circuit 17 locks, which indicates that the normal operation of the device is disrupted and . The measurement cycle is then repeated in this order.

Claims (1)

Invention Formula A device for monitoring extended products, comprising a generator connected in series, a vortex converter and an information processing unit, characterized in that, in order to increase the reliability of the control, it is equipped with a connected pulse respectively, with the second output-55 meter footage, the first counting blocks 13-15 of the permanent memory. The outputs of circuits 17-19 are designed to be connected to an alarm unit (not shown). com, the first block of permanent memory, the first output of which is connected to the second input of the first counter, the OR circuit and the RS trigger, and three by coincidence circuits, the first inputs are connected to the output of the first block of the local memory, and the third are connected to the output of the RS flip-flop, connected in series by the first comparator connected to the output of the information processing unit, the second counter and the second fixed memory unit, the first the output of which is connected to the second input of the second counter, and the second output is connected to the second input of the first coincidence circuit, connected in series by a second comparator connected to the information processing unit, the third counter and the third block a fixed memory, the first output of which is connected to the second input of the third counter, and the second output is connected to the second input of the second coincidence circuit, connected in series by a third comparator connected to the output of the information processing unit, the fourth the counter and the fourth block of permanent memory, the first output of which is connected to the second input of the fourth counter, and the second output - to the second input of the third coincidence circuit, the output of which is connected to the fourth inputs of the first n second coincidence circuit, and connected in series by a timer and fourth coincidence circuit whose second input is connected to the output of the first block of the permanent memory, and the output is connected to the RS flip-flop, the third inputs of the second, third and fourth counters are combined and connected to the first output of the first block a permanent memory, timer input, and n input Tide second, third and fourth blocks of the ROM are connected to a fifth output of the first block of nonvolatile memory and the output of the second coincidence circuit connected to said fifth input of the first coincidence.