SU1640621A1 - Picture monitor for non-destructive testing - Google Patents

Abstract

The invention relates to non-destructive testing of materials and products and can be used in the visualization of defects by magnetographic methods. The purpose of the invention is to increase the reliability of the control by automating the process of tuning to the parameters of the object being monitored. Depending on the properties of the control object, a strobe pulse is formed, which is filled with pulses from a generator of 7 variable frequency clock pulses. The pulse counter 9 counts a predetermined number of pulses and, depending on the measured value, the frequency of the variable-frequency generator of the 7 variable-frequency clocks varies according to the properties of the product under test. The control results are recorded in memory block 4 and are indicated by display unit 5. 1 il. Yo

Description

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The invention relates to the non-destructive testing of materials and products and can be used in the visualization of defects by magnetographic methods.

The purpose of the invention is to increase the reliability of control by automating the adjustment process to the parameters of the object being monitored.

The drawing shows a block diagram of the device.

The device contains serially connected primary converter 1, analog-to-digital converter 2, switch 3, memory block 4, indication unit 5 and a gate pulse shaper 6 connected between the output of the primary converter 1 and the control input of memory block 4.

In addition, the device contains a variable-frequency oscillator 7 of variable frequency, the output of which is connected to the second input of the analog-digital converter 2, a selector 8, a pulse counter 9, a comparison logic 10, the second input of which is combined with the second input of the selector 8 and connected to the output of the gate generator 6, and the integrator 11, the output of which is connected to the control input of the generator 7 clock pulses of variable frequency.

The device works as follows.

The gating pulse shaper 6 is excited by signals from the primary converter 1. A gating pulse is fed to the input of memory block 4 and sets it to the write mode. The variable frequency generator 7 pulses the pulses to the selector S. gating pulse. The pulses go to the counter 9 pulses, counting

the given number of pulses. If the number of pulses is greater than the specified one, the signal through the comparison logic 10 is fed to the integrator 11, which produces a positive signal that reduces the frequency of the variable-frequency generator of the 7 clock pulses. If the number of pulses is less than the specified one, then the negative signal produced increases the frequency of the generator 7 clock pulses of variable frequency.

The received pulses are fed to an analog-to-digital converter 2, which digitizes the information signal recorded in memory block 4. The control results recorded in the memory block 4 are indicated by the display unit 5.

Claims (1)

Claim Video inspection device for defectoscopy containing serially connected primary converter, analog-digital converter, switch, memory block and display unit, variable frequency clock, connected to the second input of the analog-digital converter, and gate generator, connected between the output the primary converter and the second input of the memory block, characterized in that, in order to increase the reliability of the control, it is equipped with internally connected by a selector connected to a gating pulse shaper and a variable frequency clock pulse generator, pulse counters, a logic number comparing the number of clock pulses whose second input is connected to a gating pulse shaper, and an integrator whose output is connected to a variable frequency pulse generator input.