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从1949年开始到现在,国外已研制出四代电容薄膜压力传感器.第一代是差压式双边对称电极的传感器;第二代是绝对式单边双电极的传感器;第三代在测量线路上有了很大的改进;第四代是对式单边单电极的传感器,首先分析了造成电容压力传感器稳定性差的6种原因。认为环境温度的改变和规管焊接应力是造成规管零漂的主要因素。并对这两种主要因素提出了相应的解决办法.温度变化的影响采用恒温的方法来解决.焊接应力的影响采用以粘代焊的方法来消除.采用这两种措施以后,电容薄膜规的稳定性有了较大的改善.
From 1949 to the present, four generations of capacitive film pressure sensors have been developed abroad. The first generation is a sensor with differential pressure bilateral symmetrical electrodes; the second generation is an absolute one-sided and two-electrode sensor; On the fourth generation is a single-sided single-sided sensor, first of all to analyze the reasons for the poor stability of capacitive pressure sensor 6 reasons. It is considered that the change of ambient temperature and the regulation of welding stress are the main factors that cause the regulation of zero drift. And the two main factors put forward the corresponding solutions.Changes in temperature by the method of constant temperature to solve the impact of welding stress by the method of using adhesive to eliminate.With these two measures, the capacitance of the film gauge Stability has been greatly improved.