Abstract:Objective To speed up the data processing, controlling accuracy and stability, and to lower the power dissipation of
automatic frequency control system of medical electron linear accelerator. Methods With the way of phase discrimination, the
frequency difference caused by the change of magnetron frequency was transformed to phase separation of forward wave and
backward wave. The phase separation was then transformed to voltage difference which was transmitted to MSP430 microcontroller
through signal processing circuit so that the generator could be successfully driven while at the same time the oscillation frequency
of magnetron could be stabilized. Results The data processing speed was promoted, the power dissipation was lessened while
controlling accuracy and stability were also promoted. Conclusion The average data of absolute value of frequency difference of
forward wave and backward wave was less than or equal to 0.018 MHz, the stability accuracy was within the standard level so the
automatic frequency control system of medical electron linear accelerator designed reached the target requirements of general design.
钱琳琳,刘彦伟. 基于MSP430的医用直线加速器自动频率控制系统的设计[J]. 中国医疗设备, 2018, 33(6): 41-45.
QIAN Linlin, LIU Yanwei. Design of Automatic Frequency Control System of Medical Electron
Linear Accelerator Based on MSP430. China Medical Devices, 2018, 33(6): 41-45.