Filament current and tube current dual-closed loop control device for X-ray machine

Abstract

The invention provides a filament current and tube current dual-closed loop control device for an X-ray machine, belonging to the technical field of medical apparatus and instruments, and structurally consisting of a tube current sampling unit, a tube current reference unit, a filament current reference unit, a tube current closed-loop control unit, an addition unit, and a filament current closed-ring control unit. According to the technical points, a tube current is dynamically adjusted by using the tube current closed-loop control unit, and a filament current reference and tube current dual-closed loop is controlled by the addition unit. The filament current and tube current dual-closed loop control device provided by the invention has the advantages as follows: not only can the tube current stabilize the filament current, but also the filament current is stabilized again through a tube current feedback signal, so that the tube current and the filament current obtain higher precision and stability through dual-path closed ring. Particularly, the filament current and tube current dual-closed loop control device for the X-ray machine has very obvious effects in large-current photograph, continuous fluoroscopy and pulse fluoroscopy.

Description

technical field [0001] The invention belongs to the technical field of medical equipment. Background technique [0002] Existing medical X-ray machines, especially X-ray machine technologies for surgery, mostly use the filament current as the feedback to form a closed loop, and do not directly form a closed loop with the tube current, which is difficult to meet the cutting-edge requirements. The difference leads to unstable tube current and affects image quality. Under high current conditions, it will cause tube overcurrent and affect the working life of the tube. Different tubes and filament transformers will have inconsistent efficiency and working status, making it difficult to meet the interchangeability requirements. Contents of the invention [0003] The purpose of the present invention is to provide a high-precision, high-stability and dynamic-adjustment current closed-loop control device in order to overcome the above-mentioned defects, increase the safety and reli...

AI Technical Summary

Problems solved by technology

[0002] Existing medical X-ray machines, especially X-ray machine technologies for surgery, mostly use the filament current as the feedback to form a closed loop, and do not directly form a closed loop with the tube current, which is difficult to meet the cutting-edge requirements. The difference leads to unstable tube current and affects image quality. Under high current conditions, it will cause overcurrent in the tube and affect the working life of the tube. Different tubes and filament transformers will have inconsistent efficiency and working status, which is difficult to meet the interchangeability requirements.

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