电容式密度传感器低密度液氢校准实验研究  

Research on calibration of capacitive density sensor for low-density liquid hydrogen

作　　者：余炳延 王晖[1] 苏嘉南 申娟[1] 陈静[1] 

机构地区：[1]北京航天试验技术研究所,北京100074

出　　处：《低温工程》2017年第2期71-76,共6页Cryogenics

基　　金：国家国防科技工业局航天液体发动机试验系统计量综合保障专项工程(JSJC2013203A001)

摘　　要：设计、搭建了一套可调节密度式多点电容式密度传感器校准装置,并进行了电容式密度传感器低密度液氢的校准试验。实现了对液氢在一定低密度范围内(50—70kg/m3)的调节,突破了传统的常压单一密度点校准技术,实现了液氢多密度点的校准,提高了校准结果的可靠性。对电容式密度传感器校准装置各因素引入的不确定度分量进行了评定,分析得到了该装置的不确定度,试验结果表明采用给液氢增压的方式可以对液氢低密度进行准确控制,该调节装置的不确定度满足电容式密度传感器校准设计要求,并且能够对电容式密度传感器在多种低温流体介质中进行较宽密度范围校准。A set of calibration system for capacitive liquid hydrogen den constituted. Calibration test in low-density liquid hydrogen was done. Adju in a certain range（50--70 kg/m^3） can be achieved and calibration points were realized, improving the reliability of calibration results in liqui sensor calibrating system was investigated. The results shows that the sity sensor was schemed out and sting density of liquid hydrogen d hydrogen at multi density set The uncertainty of capacitive density uncertainty can satisfy the calibration requirement, and the designed calibration system can be used for the calibration of capacitive sensor in various of low temperature fluids.

关 键 词：电容式密度传感器 液氢 校准 

分 类 号：TB663[一般工业技术—制冷工程]