SU1458797A1 - Coordinate graph plotter for flaw detection - Google Patents

Description

The invention relates to a flaw detection technique and can be used to control welded joints.

The purpose of the invention is to improve the accuracy of inspection by reducing the inconsistency of the coordinates of the display area and the control zone.

The drawing shows a block diagram of the device.

The device contains a magnetic tape 1, a magnetic head 2, the leading node, made in the form of two

The ziometric displacement sensor, the engine of which is kinematically connected to one of the master unit's rollers, is distinguished by the fact that, in order to improve the accuracy of defectoscopy by reducing the inconsistency between the coordinates of the display zone and the control zone, it is equipped with an analog-digital converter, a register and a comparison unit The input of the analog-digital converter is connected to the output of the displacement sensor, the output of the analog-digital converter is connected to the register input, to the first input of the comparator and to the address input okontrolnogo narrow £ 2 la, the register output is connected to the second input of the comparator, the comparator output mismatch codes vile keys to the control input of the first register and to the control input of the video control unit, and the output "moreless" comparison unit connected to the second control input of the video control unit.

2

the rollers 3 and the endless flat belt 4 installed with the coverage of the rollers 3, the analog-digital converter 5, the register 6, the code comparison block 7, the clock generator 8, the video monitoring node 9 and the potentiometric displacement sensor 10.

Video control node 9 contains

serially connected primary transducer whose input

connected to the magnetic head 2,

analog-to-digital converter,

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1458797

a memory unit, a digital-to-analog converter and an indicator on a color cathode-ray tube. Node 9 also contains a synchronization generator and a memory cell address driver, the input of which is connected to the output of analog-digital converter 5, the control buses are connected to the first and second outputs of the comparison unit 7, the first of which is the output of the code mismatch, the second is the output of the " more is less ", and the output of the memory address mapper is connected to the memory block. 15

The device works as follows.

The signal from the magnetic head 2 is fed to the input of the primary converter, the ac of its output to the analogue-to-digital converter, the code of which is entered into a memory block. The code from the analog-to-digital converter .5 through the address generator sets the address of the row of the memory cell, the number of which in the row 25 is determined by sampling the input signal from the head 2.

In read mode, synchronously with the line scan of the indicator on the cathode ray tube, the memory cell address shaper 30 reads the line behind the line of information and displays it on the screen of the indicator.

In accordance with the movement of the magnetic tape I over product 11, the potential taken from the displacement sensor 10 changes and the binary code from the output of the analog-digital converter 5 changes to the input of the register 6 and the code comparison unit 7 accordingly. If the codes do not match, the output signal of the comparison block 7 overwrites the code in the register 6 and a control command is sent to change the memory address in the video monitoring node 9. Comparing the value of the codes in block 7, it produces a "more-less" signal in the latter, which sets the direction changes in memory address in video monitoring node 9.

Since information is read from memory cells line by line and synchronously with the image scan, the scales of the control zone along the direction of movement of the magnetic tape 1 and the display zone on the indicator screen in the conditional direction will be proportional.

Claims (1)

COORDINATOGRAPH FOR DEFECTOSCOPY, containing a magnetic tape, magnetic head connected to a video monitoring node, a leading node made in the form of two rollers and an endless flat belt installed with a roller coverage, and a potential1