Portable High Frequency X-ray Flaw Detector

Abstract

The invention relates to the field of nondestructive examination and discloses a portable high-frequency X-ray flaw detection machine. The portable high-frequency X-ray flaw detection machine comprises an operating panel and a ray generator, wherein the ray generator comprises a power input module, a synchronous rectification circuit, a bridge type inversion circuit, a high-frequency transformer, a 10-time-pressure rectification circuit and an X-ray tube; a voltage and tube current sampling circuit is connected between the 10-time-pressure rectification circuit and the X-ray tube; a current sampling circuit is connected between the X-ray tube and a constant-current power supply; the voltage and tube current sampling circuit feeds back an acquired acceleration voltage signal to an ARM singlechip and a driving circuit; the current sampling circuit feeds back an acquired filament current signal to the ARM singlechip and the constant-current power supply. The portable high-frequency X-ray flaw detection machine has the advantages that the X-ray acceleration voltage and the filament current adopt a digital-analog double-closed-loop working mode, so that monitoring and correction on the X-ray acceleration voltage and the filament current can be realized; the definition of a shot picture is high, and the X-ray penetration thickness is high.

Description

technical field [0001] The invention relates to the field of non-destructive testing, in particular to a portable high-frequency X-ray flaw detector. Background technique [0002] Portable X-ray flaw detectors are widely used in the field of non-destructive testing. At present, the portable X-ray flaw detectors in the domestic and foreign markets mainly include three parts: controller, machine head and power supply cable. The controller contains control circuit and power circuit, mainly to generate intermediate frequency pulse voltage. The interior of the head mainly includes two parts: the intermediate frequency booster high voltage package and the X-ray tube. The main disadvantage of the X-ray flaw detector adopting this structure is that the power supply cable must use a high-current cable, and the current in the cable is a pulsating current, which will generate large interference and radiation. The requirements for cables and connection terminals are very high, resulti...

AI Technical Summary

Problems solved by technology

The disadvantage of using this technology is that the booster high-voltage package is large in size, heavy in weight, high in cost, and easily damaged by high-voltage breakdown of the high-voltage package. The voltage supplied to the X-ray tube is a pulsating voltage, so the generated X-rays are intermittent. The efficiency of the X-rays generated in the X-ray is low, and the energy of the rays is also unstable. Therefore, when the film is exposed per unit time, the thickness of the penetrated object is relatively much smaller.

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