CN103249238A

CN103249238A - Integrated grid-controlled cold cathode x-ray generating device used for X-ray unit

Info

Publication number: CN103249238A
Application number: CN2012100292960A
Authority: CN
Inventors: 李劲生; 徐俊
Original assignee: Nanjing Perlove Radial Video Equipment Co Ltd
Current assignee: Nanjing Perlove Radial Video Equipment Co Ltd
Priority date: 2012-02-10
Filing date: 2012-02-10
Publication date: 2013-08-14

Abstract

An integrated grid-controlled cold cathode x-ray generating device used for an X-ray unit belongs to the technical field of medical instruments. The x-ray generating device structurally comprises an IGBT (Insulated-Gate Bipolar Transistor) inverter unit 1, 0-4 kV controllable direct current (2), an AVR (Automatic Voltage Regulation) chip control unit (3), 0-800 V controllable direct current (4), a high-voltage anode (5), a grid-controlled cold cathode X-ray tube (6), a high-voltage transformer (7) and a rectifying filter (8), and is characterized in that an AVR singlechip is taken as a control center of the device to control the time sequences and working conditions of all power sources; two controllable power sources are respectively used for controlling two grid electrodes; the tube current intensity and focal point size can be controlled through controlling the intensity of the voltage of the grid electrodes; and the tube current is converted utilizable x-ray to improve the efficiency. The device provided by the invention has the advantages of enhancing the ray quality of the x-ray unit and improving the imaging definition.

Description

A kind of integrated grid-control cold cathode X-ray generator for X-ray machine

Technical field

The invention belongs to technical field of medical instruments.

Background technology

After 2010, the commercialization X-ray production apparatus all is with hot cathode filament non-grid control in the world, and the filament heating is slow, and emergent ray time is long, and the focal spot size size is uncontrollable, and scattered rays is many, and the X ray utilance is low.

Summary of the invention

The present invention seeks to: for overcoming the defective of above-mentioned existence, it is controlled to reach focus, and tube current is converted into and can utilizes X ray efficient to improve, and strengthens the quality of X-ray production apparatus ray, improves the definition of imaging.

The technical solution adopted in the present invention is:

Adopt the AVR single machine unit to install control centre as this, control sequential and the operating state of each power supply, adopt two controllable electric powers to control two grids of ray tube respectively, big or small control valve size of current and focus size by the control gate pole tension, the IGBT inversion unit becomes high-frequency electrical with dc inverter, the process high-tension transformer boosts and passes through rectification filtering unit again, is the power supply of ray tube anode and negative electrode.

Description of drawings:

Figure is this principle of device block diagram.

Embodiment

With reference to accompanying drawing, this device is by IGBT inversion unit (1), the controlled direct current of 0 ~ 4kV (2), AVR chip controls unit (3), the controlled direct current of 0 ~ 800V (4), high-voltage anode (5), grid-control cold cathode X-ray tube (6), high-tension transformer (7), (8) eight parts of rectifying and wave-filtering are formed, AVR chip controls unit (3) control IGBT inversion unit (1) is opened inverter circuit, IGBT inversion unit (1) is given high-tension transformer (7) with the alternating voltage after the inversion, through after boosting, carry out voltage multiplying rectifier and filtering by rectifying and wave-filtering (8), high tension voltage is added to high-voltage anode (5) and grid-control cold cathode X-ray tube (6) negative electrode, the voltage swing of AVR chip controls unit (3) the control controlled direct current of 0 ~ 4kV (2), and this voltage is added to first grid and the negative electrode of grid-control cold cathode X-ray tube (6), tube current size with this voltage control grid-control cold cathode X-ray tube (6), the voltage swing of AVR chip controls unit (3) the control controlled direct current of 0 ~ 800V (2), and this voltage added to second grid and the negative electrode of grid-control cold cathode X-ray tube (6), with the focus size of this voltage control grid-control cold cathode X-ray tube (6).Its advantage is: strengthen the quality of X-ray production apparatus ray, improve the definition of imaging.

Claims

1. integrated grid-control cold cathode X-ray generator that is used for X-ray machine, its structure is by IGBT inversion unit (1), the controlled direct current of 0 ~ 4kV (2), AVR chip controls unit (3), the controlled direct current of 0 ~ 800V (4), high-voltage anode (5), grid-control cold cathode X-ray tube (6), high-tension transformer (7), rectifying and wave-filtering (8) is formed, it is characterized in that: AVR chip controls unit (3) control IGBT inversion unit (1) is opened inverter circuit, IGBT inversion unit (1) is given high-tension transformer (7) with the alternating voltage after the inversion, through after boosting, carry out voltage multiplying rectifier and filtering by rectifying and wave-filtering (8), high tension voltage is added to high-voltage anode (5) and grid-control cold cathode X-ray tube (6) negative electrode, the voltage swing of AVR chip controls unit (3) the control controlled direct current of 0 ~ 4kV (2), and this voltage is added to first grid and the negative electrode of grid-control cold cathode X-ray tube (6), tube current size with this voltage control grid-control cold cathode X-ray tube (6), the voltage swing of AVR chip controls unit (3) the control controlled direct current of 0 ~ 800V (2), and this voltage added to second grid and the negative electrode of grid-control cold cathode X-ray tube (6), with the focus size of this voltage control grid-control cold cathode X-ray tube (6).