基于TDR技术的新型低温制冷系统液位检测  

Liquid Level Detection of New Cryogenic Refrigeration System Based on TDR Technology

作　　者：胡俊达 刘昊 徐辛 黄佳俊 张勇[1] HU Junda;LIU Hao;XU Xin;HUANG Jiajun;ZHANG Yong(School of Electrical Engineering,Southwest Jiaotong University,Chengdu60031,China;School of Physical Science and Technology Southwest Jaotong University,Chengdu 610031,China;School of Materials Seience and Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学电气工程学院,四川成都610031 [2]西南交通大学物理科学与技术学院,四川成都610031 [3]西南交通大学材料科学与工程学院,四川成都610031

出　　处：《成都大学学报(自然科学版)》2025年第1期46-51,64,共7页Journal of Chengdu University(Natural Science Edition)

基　　金：国家磁约束核聚变能发展研究专项(2022YFE03020002)。

摘　　要：低温液体的液位是低温制冷系统的一个重要参数,因此需要对其进行准确、快速测量,由于低温液体特殊的物理性质,导致传统的液位计难以检测其液位.基于时域反射技术(TDR)设计了新型液位检测装置.分析了传统TDR液位计的缺陷,并通过短路浮子对其进行改进,推导了液位高度的计算公式,上位机自动计算液位高度并输出.检测结果表明,该新型TDR液位检测装置具有精度高、响应迅速、稳定性高等优点,可以满足低温制冷系统的液位检测需求.The liquid level of cryogenic liquid is an important parameter of cryogenic refrigeration system,which needs to be measured accurately and quickly.Due to the special physical properties of cryogenic liquid,it is difficult for traditional level gauges to detect its liquid level.Based on time domain reflectometry(TDR),a new type of liquid level detecting device was designed.The defects of traditional TDR liquid level meter were analyzed and the traditional TDR liquid level meter was improved by short circuit float in this paper with the calculation formula of liquid level height being deduced.The upper computer could calculate the liquid level height and output it automatically.The test results showed that the new TDR liquid level detection device has advantages of high precision,rapid response and high stability,which can meet the needs of liquid level detection in low temperature refrigeration system.

关 键 词：低温制冷系统 液位检测 TDR 

分 类 号：TB567[交通运输工程—水声工程]