数字压力计在实验室环境下的稳定性与重复性评估  

Evaluation of stability and repeatability of digital pressure gauge in laboratory

作　　者：王鹏 WANG Peng(Beijing Xicheng District Metrology and Testing Institute,Beijing 100055,China)

机构地区：[1]北京市西城区计量检测所,北京100055

出　　处：《实验室检测》2024年第11期127-130,共4页Laboratory Testing

摘　　要：目的本研究旨在评估数字压力计在实验室环境下的稳定性与重复性,以验证其在不同压力范围内的测量准确性和长期使用中的性能表现,为数字压力计的校准与应用提供科学依据。方法实验采用了多点多次测量的方法,选取0.1、0.3、0.6 MPa三个不同的压力点进行测试。每个压力点进行了10次重复测量,以评估数字压力计的重复性。同时,通过每三个月一次的长期测量,持续一年,观测数字压力计在长期使用中的稳定性表现。实验环境条件严格控制,温度保持在(20±2)℃,相对湿度在40%至60%之间。结果数字压力计在三个压力点上的标准偏差分别为0.10088、0.30057、0.60087,标准偏差均较小,重复性良好。同时,在长时间使用过程中,各测量点的测量值变化幅度较小,极差和平均值的变化均在允许误差范围内,表明其具有良好的长期稳定性。结论数字压力计在实验室环境下表现出较高的重复性和稳定性,适用于高精度压力测量场合。本研究为数字压力计的校准和实际应用提供了科学依据,同时也为未来相关设备的研发和改进提供了参考方向。Objective This study aims to evaluate the stability and repeatability of digital pressure gauges in laboratory environments,to verify their measurement accuracy in different pressure ranges and performance in long-term use,and to provide scientific basis for the calibration and application of digital pressure gauges.Methods The experiment adopted a multi-point and multiple measurement method,selecting three different pressure points of 0.1,0.3,0.6 MPa for testing.Ten repeated measurements were taken at each pressure point to evaluate the repeatability of the digital pressure gauge.Meanwhile,through long-term measurements every three months for one year,observe the stability performance of the digital pressure gauge during long-term use.The experimental environment conditions are strictly controlled,with a temperature maintained at(20±2)℃and a relative humidity between 40%and 60%.Results The standard deviations of the digital pressure gauge at the three pressure points were 0.10088,0.30057 and 0.60087,respectively.The standard deviations were small and the repeatability was good.At the same time,during long-term use,the measurement values at each measurement point have a relatively small change amplitude,and the changes in range and average values are within the allowable error range,indicating that it has good long-term stability.Conclusion Digital pressure gauges exhibit high repeatability and stability in laboratory environments,making them suitable for high-precision pressure measurement applications.This study provides a scientific basis for the calibration and practical application of digital pressure gauges,and also provides a reference direction for the research and improvement of related equipment in the future.

关 键 词：数字压力计 稳定性 重复性 

分 类 号：TH823.2[机械工程—仪器科学与技术]