Evaluation and correction for long-term drift of hydraulic pressure gauges monitoring stable and constant pressures
Evaluation and correction for long-term drift of hydraulic pressure gauges monitoring stable and constant pressures
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DOI：
10.1016/j.measurement.2018.10.051
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发表时间：
2019-02-01
期刊：
影响因子：
5.6
通讯作者：
Kobata, Tokihiko
中科院分区：
文献类型：
--
作者：
Kajikawa, Hiroaki;Kobata, Tokihiko
我们已经评估了在恒定压力应用下保持的液压压力计的长期漂移。对3只压力表进行了100 MPa的加压和保持，并对100 MPa下校准结果的变化进行了800天的跟踪。校准结果在压力施加后立即显著变化，并且随着压力的连续施加，变化率变得很小并且几乎恒定。观察到的漂移趋势与压力计始终保持在大气压下时观察到的漂移不同。此外，在压力施加期间，短时间间歇地释放压力至大气压，并且获得大气压下的输出。在100 MPa和大气压下的校准结果显示出类似的漂移趋势，表明压力下的大部分漂移可以通过零偏移来校正。提出了几种方法来适当地评估和校正压力表在恒压应用下使用期间的长期漂移。(C)2018爱思唯尔有限公司版权所有。
We have evaluated a long-term drift of hydraulic pressure gauges which are kept under constant pressure application. Three pressure gauges were pressurized and kept at 100 MPa, and the variations in calibration results at 100 MPa have been traced for 800 days. The calibration results significantly varied immediately after the pressure application, and the variation rate became small and almost constant as the pressure was continuously applied. The observed drift trend was different from the drift which is observed when the gauges are always kept at atmospheric pressure. In addition, during the pressure application, the pressure was intermittently released to atmospheric pressure for a short time, and outputs at atmospheric pressure were obtained. The calibration results at 100 MPa and atmospheric pressure showed a similar drift trend, showing that most part of the drift under pressure can be corrected by zero offset. Several methods are proposed to appropriately evaluate and correct the long-term drift of pressure gauges during use under constant pressure application. (C) 2018 Elsevier Ltd. All rights reserved.