A switching power supply detection system for medical electron linear accelerator
A linear accelerator, switching power supply technology, applied in the direction of power supply testing, etc., can solve the problems of reducing the complexity of replacing and debugging power supply, lack of intelligent adjustment, parameter memory, and lack of detection and alarm functions, so as to reduce the time of intelligent adjustment. , the effect of improving reliability and improving output accuracy
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 The fault alarm process of the switching power supply detection system for accelerators is as follows: figure 2 shown. After the system is powered on, the current sensor continuously senses ampere-level high current into milliampere-level small current. The small current is converted into a voltage signal by the signal conditioning module, and then transmitted to the A / D conversion module after low-pass filtering. The microcontroller first initializes the peripherals and variables, then controls the A / D conversion module to sample once every 1ms, and uses the median average filter algorithm to filter out interference and obtain the final sampling value after sampling 25 times, and the microcontroller converts the sampling value into the corresponding Actual output current value. The initial state of the default power supply of the microcontroller is off, that is, there is no current output. When the switching power supply is started, the host of the accelerator send...
 The intelligent adjustment and parameter memory process of the switching power supply detection system for accelerators is as follows: image 3 As shown, the foregoing steps after the system is powered on are the same as those in Embodiment 1. Still taking the magnetron magnet current as an example, assuming that the preset value is 32A, that is, the preset normal threshold range is (28.4, 35.6), the corrected range is (28.4, 31.964)∪(32.036, 35.6), and the precise range is ( 31.964, 32.036). If the actual output current value is 31.5A, which is within the correction range, the single-chip microcomputer determines that the power supply is not faulty, but the power output can be corrected. The single-chip microcomputer first queries the preset value and the correction value corresponding value table stored in the on-chip non-volatile memory, and queries the correction value corresponding to the preset value of the magnetron magnet power supply 32A. If the corresponding ...
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