温度传感器动态响应校准恒温恒速水槽研究OA北大核心CSTPCD
Research of Constant Temperature and Velocity Water Bath for Calibration of Temperature Sensors'Dynamic Response
动态响应是安全重要场合温度传感器的关键性能,恒温恒速水槽是温度传感器水流环境动态响应校准的核心设备.针对典型环形旋转水槽升温慢的问题,研制了基于精密滑环的电加热环形旋转水槽,开展了温场性能和流场性能测试,并与现有射流旋转水槽温度传感器动态响应校准装置的结果进行了比较.结果表明,新研制的基于精密滑环的电加热环形旋转水槽升温时间缩短,温度波动度显著小于温度阶跃量的±1.0％,竖直方向流速均匀度显著优于10％的要求.对铠装热电阻和热电偶时间常数进行了测量,与现有装置测量结果的偏差分别为4.1％和7.5％,满足工程应用要求,为温度传感器动态响应校准提供了良好的恒温恒速环境条件.
Dynamic response is a key performance of temperature sensors in important and safety occasions.The constant temperature and velocity water bath is the core equipment for the calibration of temperature sensors'dynamic response.Due to the slow heating rate in typical annular rotating water bath,a novel electrically heated annular rotating water bath was developed based on the precision sliding ring,and the temperature fluctuations and velocity fields of the novel bath were tested.The results show that the heating up time is shortened,the temperature fluctuation is significantly less than±1.0％of the step temperature,the vertical velocity uniformity is significantly better than 10％of the novel bath.The time constants of a sheathed resistance thermometer and a sheathed thermocouple were measured by the existing jet rotating water bath and the novel bath.The deviations from the existing bath results are 4.1％and 7.5％,respectively,these meet the engineering requirement.The novel bath provides good constant temperature and velocity environmental conditions for the dynamic response calibration of temperature sensors.
郑伟;刘波;王志远
上海市计量测试技术研究院,上海 201203上海理工大学能源与动力工程学院,上海 200093
温度计量温度传感器动态响应时间常数恒温恒速水槽
temperature measurementtemperature sensordynamic responsetime constantconstant temperature and velocity water bath
《计量学报》 2024 (009)
1257-1261 / 5
上海市市场监督管理局科技项目(2022-21)
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