CUI Guang-hao~1, WEN Hua~2, LEI Gang~1, et al. Design of high-accuracy oil-less package pressure sensor[J]. 2006, (11): 55-56+60. DOI: 10.13873/j.1000-97872006.11.018.
高精度无油封压力传感器设计
摘要
设计了一种新的传感器封装方法。该方法采用双膜片结构
无油封装。压力膜片为硅-蓝宝石材料
通过硅的压阻效应
利用下膜片实现压力传递
上膜片的惠斯登电桥将感受的压力转换为电压信号。经过温度补偿
使热漂移信号大幅度降低。试验结果表明:在常温条件下
传感器准确度为0.14%FS。在-55
2
00℃范围内
热零点漂移为0.48×10-3%FS/℃
热灵敏度漂移为0.61×10-3%FS/℃。
Abstract
A new sensor packaging method is designed.Based on piezoresistive effect
the non-oil filled senor is packaged in double-diaphragm.One of the pressure diaphragms is made of silicon-on-sapphire.The pressure is transferred by the bottom diaphragm
and the pressure signal is converted into voltage signal by the Wheatstone bridge on the upper diaphragm.Due to temperature compensation
thermal drift of the sensor is reduced greatly.The experiment result indicates that the accuracy of sensor can be 0.14 %FS at room temperature
offset thermal shift is 0.48×10
-3
%FS/℃ and thermal sensitivity shift can be 0.61×10