基于压阻效应的油气压力传感器研究

Research on Oil and Gas Pressure Sensor Based on Pressure Resistance Effect

针对高压充油套管和高压充油互感器套管中气体积累造成安全隐患的问题,提出一种油气压力传感器,其适用于高压变压器或高压互感器充油套管内的油压及油气温度测量及其他气体或液体的测量。该传感器基于压阻效应同时监测被测对象压力及温度,采用太阳能电池双能源供电,采集数据通过无线链路传送至接收装置。采用霍尔开关,设计了一种完整罩式壳体同时与传感器探头连接部位为一体,具有良好的密封性。通过实验测试得到该传感器在压力范围0~600 kPa内压力测量精度最大误差在0~2 kPa以内,温度范围-40℃~125℃内温度精度误差在0~2℃以内,压力测量精度及温度精度较好。在空旷室外测试得到在90%接收率下该传感器发射距离范围为250 m~270 m,满足实际应用需求,故该传感器实用可靠。该传感器具有密封性好、安装简单,低功耗等优点。

In view of the potential safety hazard caused by gas accumulation in high-voltage oil-filled casing and high-voltage oil-filled transformer casing,an oil and gas pressure sensor is proposed,which is suitable for the measurement of oil pressure and oil and gas temperature in oil-filled casing of high-voltage transformer or high-voltage transformer,and the measurement of other gases or liquids.The sensor uses solar cell dual energy power supply,which can simultaneously monitor the pressure and temperature of the measured object online,and the collected data is transmitted to the receiving device through wireless link.Using Hall switch,a complete cover shell is designed and connected with the sensor probe,which has good sealing.Through the experimental test,in pressure range 0 ~ 600 KPa,the maximum error of the pressure measurement accuracy of the sensor is within 0~2 KPa,and in temperature range-40~125 ℃,the temperature accuracy error is within 0~2 ℃.The pressure measurement accuracy and temperature accuracy are good.In the open outdoor test,the emission range of the sensor is 250~270 m at 90 % receiving rate,which meets the practical application requirements.So the sensor is practical and reliable.The sensor has the advantages of good sealing,simple installation and low power consumption.