便携式X光机原理
The principle of portable X optical machine
当接通电源，按下启动按钮时，整机便开始工作。由主控器发出的脉冲信号，经功率放大，倍压产生高压给X射线管阳极，同样主控Ⅱ发出的脉冲信号经放大给X射线管灯丝，使X射线管产生X射线，并通过数显面板显示出相应的值KV/μA。此时被测物体放在X射线源与像增强器之间，像增强器的显示屏就显示出被透视物的清晰图像。为使仪器稳定可靠地工作，系统采用脉冲宽调技术，使管电流、管电压保持恒定，X射线管以最佳状态工作。并有高压慢启动功能，使X射线管阳极无高压过冲现象。主控制器采用微型贴片器件，并以20KHz频率工作，使整个系统效率大为提高，消除了噪声，为操作人员提供了安静的使用环境，同时也缩小了体积。透视仪电源采用高频高效率开关电源，并具有全面的保护措施。为确保透视仪的安全，整机加有多种保护装置，使其安全可靠。
When the power is connected and the start button is pressed, the whole machine starts to work. The pulse signal produced by the master controller is amplified by power and multiplies pressure to produce the X ray tube anode. The pulse signal from the main control II is amplified to the X ray tube filament, so that the X ray tube produces X ray, and the corresponding value KV/ mu A is displayed through the digital display panel. At this point, the object is placed between the X ray source and the image intensifier. The display screen of the intensifier displays clear images of the perspective objects. In order to make the instrument work stably and reliably, the pulse width modulation technology is adopted to keep the tube current and tube voltage constant, and the X ray tube works at optimum condition. It has the function of high voltage slow start, which makes the anode of X - ray tube without high pressure overshoot. The main controller uses a microchip device and works with 20KHz frequency to improve the efficiency of the whole system, eliminate the noise, provide a quiet environment for the operator and reduce the volume. The power supply of the perspective instrument adopts high frequency and high efficiency switching power supply, and has comprehensive protection measures. In order to ensure the safety of the perspective instrument, various protective devices are added to the machine to make it safe and reliable.