期刊论文

Su, J.J.

中文

中国医疗器械杂志

1671-7104

2008

32

6

443-445,448

10.3969/j.issn.1671-7104.2008.06.016

本校为第一机构

应用IGBT实现高频逆变,实时采样、脉宽调制确保对阳极高压和管电流的闭环控制,采用微电脑精确控制,组合式球管技术,研制出5台牙科X线机,该机实现了外部无高压,加在X发射管上的电压波动在1%以内,曝光时间误差在3%以内,拍摄的照片可以清晰显示出牙髓腔及周围组织,完全可满足临床透视要求。

This paper introduces five dental X-ray machines which are manufactured with IGBT to realize high frequency, real-time sampling and PWM to ensure the closed-loop control for tube current and Anodes's high voltage. These five machines also use microcomputer and combined X-ray tube for precise control. The sets don't have high voltage outside. The error of tube voltage is less than 1% and exposure time is less than 3%. The photos of pulp cavity and surrounding tissue can be seen clearly. These sets s...