Pulsed X-ray generation method and pulsed X-ray generation device

Abstract

The invention provides a pulsed X-ray generation method and a pulsed X-ray generation device. A feedback signal processing unit of a high-voltage pulse generation system of the pulsed X-ray generation device receives a tube voltage feedback value signal and forms a close loop control circuit with a voltage setting value signal; a feedback signal processing unit of a tube current control system receives a tube current feedback value signal and forms a close loop control circuit with a current setting value signal; a signal generation unit of a control system generates a tube voltage analog value and setting value signal and inputs the signal to the high-voltage pulse generation system, and generates a tube current analog value and setting value signal and inputs the signal to the tube current control system; a feedback signal processing unit of the control system receives the tube voltage and tube current feedback value signals; and a time schedule control unit of the control system controls each unit according to a preset time schedule. The invention has the following advantages: the pulse frequency and the duty ratio are adjustable; each pulsed X-ray has good repeatability and uniformity; and the rising edge and the falling edge of a single pulse are steep.

Description

technical field [0001] The invention relates to X-ray technology, in particular to a method for generating pulsed X-rays and a device for generating pulsed X-rays powered by pulse trains. Background technique [0002] X-ray devices are more and more used in industrial and medical inspections. At present, X-ray generators are divided into DC mode and pulse mode. The X-ray generator in DC mode is a ray tube powered by DC high voltage, and the output is Continuous and uninterrupted X-rays. The X-ray generator in pulse mode emits pulsed X-rays, and the pulse frequency and duty cycle are adjustable. The X-ray generator in pulse mode can reduce the number of detected objects under the same imaging quality. In view of the radiation dose of X-rays, useless exposure of X-rays should be avoided in the detection process, especially in the medical detection process. Therefore, pulsed X-ray generators are more and more widely used. At present, there are two ways to generate pulsed X-ray...

AI Technical Summary

Problems solved by technology

However, the gate control tube has a short life and cannot be repaired after damage

[0003] Another way is to use the Marx generator to generate high-voltage pulses and add them to the X-ray tube. The disadvantage is that the time base is unstable, and the level condition of the switch state transition is a range value, not a strictly determined value. In addition, the circuit The internal random thermal noise causes the switching level to jitter randomly, and the higher the temperature, the lower the node voltage of the semiconductor device, and the switching conditions will also change, resulting in difficult control of the pulse edge. At the same time, due to the large size of the MARX generator, the Cannot be used on dental medical CT and other equipment

Images