CAJ | 학술논문

介绍了一种应用于超导磁体的低温液位监测单元的设计与实现。设计了压控电流源电路和电压-频率转换电路用于液氦的液位测量，并设计了电容-频率转换电路用于液氮的液位测量；设计了以STM32微控制器为核心的数字电路，用于压控电流源的控制、频率信号的处理和液位监测数据的数字化显示；同时通过CAN总线把液位的监测数据自动发送至上位机，完成液位监测单元的远程控制。测试结果证明了该设计的可行性。
개소료일충응용우초도자체적저온액위감측단원적설계여실현。설계료압공전류원전로화전압-빈솔전환전로용우액양적액위측량，병설계료전용-빈솔전환전로용우액담적액위측량；설계료이STM32미공제기위핵심적수자전로，용우압공전류원적공제、빈솔신호적처리화액위감측수거적수자화현시；동시통과CAN총선파액위적감측수거자동발송지상위궤，완성액위감측단원적원정공제。측시결과증명료해설계적가행성。
The design and implementation of a low-temperature liquid level monitor unit used in superconducting magnets is introduced. In the design, voltage-controlled current source circuit and voltage-frequency conversion circuit are used in liquid helium level measurement, and capacitance-frequency conversion circuit is used in liquid nitrogen level measurement. Digital circuit based on STM32 microcontroller is used to control the voltage-controlled current source, process the frequency signal, display the liquid-level data, send the liquid-level data to the upper computer and use CAN bus to complete the remote control of the unit. The feasibility of the design was demonstrated by experimental measurements.