X-ray generating device with tube current control function

A generation device and current control technology, applied in X-ray equipment, electrical components, etc., can solve the problems of long dynamic response time and low control precision, and achieve the effect of short dynamic response time, high control precision and fast dynamic response

Active Publication Date: 2015-02-25
SHANTOU INST OF UITRASONIC INSTR CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this control method has the disadvantages of low control precision and long dynamic response time

Method used

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  • X-ray generating device with tube current control function

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Embodiment Construction

[0019] Further description will be given below in conjunction with the accompanying drawings and preferred embodiments of the present invention.

[0020] Such as figure 1 As shown, this X-ray generating device with tube current control includes an X-ray generator 1, a high voltage circuit 2, a filament power supply inverter module 3, a tube current self-feedback control module 4, a filament current control module 5 and space charge compensation Module 6; the filament power supply inverter module 3 includes a filament inverter pulse width control integrated circuit 301, a four-way drive pulse transformer 302, a filament full-bridge inverter circuit 303 and a filament transformer 304 that are electrically connected in sequence; the two ends of the high voltage circuit 2 are connected to the The X-ray generator 1 is electrically connected; the filament transformer 304 is electrically connected to the X-ray generator 1; the signal input terminal of the tube current self-feedback ...

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Abstract

The invention relates to an X-ray generating device with the tube current control function. The X-ray generating device comprises an X-ray generator, a high-voltage circuit, a lamp filament power supply inverter module, a tube current self-feedback control module and a lamp filament current control module. The signal input end of the lamp filament current control module is electrically connected with the primary side of a lamp filament transformer, and the signal output end of the lamp filament current control module is electrically connected with the control input end of a lamp filament inverter pulse width control integrated circuit. Due to the fact that the lamp filament current control module is additionally arranged based on original tube current self-feedback control, tube current self-feedback control and lamp filament heating current feedback control are achieved at the same time, the magnitude of lamp filament heating currents is adjusted so as to achieve lamp filament heating current feedback control, the lamp filament heating currents are controlled, the electron escape speed is directly controlled, the dynamic response to tube current control is faster through lamp filament heating current feedback control, tube current self-feedback control and lamp filament heating current feedback control are combined for joint control, the dynamic response time for tube current control is shorter, and control accuracy is higher.

Description

technical field [0001] The invention relates to an X-ray generating device, in particular to an X-ray generating device with tube current control. Background technique [0002] There are three important physical quantities to measure the performance of the X-ray generator, they are: tube voltage, tube current and exposure time. [0003] The ideal tube voltage should have a small rise time during exposure and the ripple voltage tends to be zero. The tube voltage determines the quality of X-rays. The size of the tube current determines the amount of X-rays; exposure time, tube voltage and tube current together determine the size of the radiation dose. Three conditions are necessary to generate X-rays: ①The cathode filament is heated to generate electrons, and these electrons form space charges around the filament, that is, the electron cloud; ②High-speed electron flow is generated under the electric field and vacuum conditions generated by high kilovolts (KV); ③ Metal targe...

Claims

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Application Information

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IPC IPC(8): H05G1/24
Inventor 李德来郭超陈静君曾哲
Owner SHANTOU INST OF UITRASONIC INSTR CO LTD
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