Research on influence of pipeline liquid impact effect on pressure sensors
As the main means of pipeline pressure testing,pressure sensor is used in various fields of military and civil,and the silicon piezoresistive pressure sensor is the most widely used pressure sensor at present,which is characterized by high precision,good stability,low price and suitable for mass production. In some specific environments,the liquid working mediums in the measured pipeline produce a dynamic abnormal impact pressure inside the pipeline due to the external vibration,impact,noise and other mechanical environments,and the amplitude and frequency characteristics of the impact pressure are related to the length and thickness of the pipeline,the characteristics of the working medium,the external excitation level,the temperature of the working medium,etc. It is difficult to accurately calculate the results with theoretical formulas. This dynamic impact signal often produces a certain degree of the mechanical damage to the pressure sensor. The formation of liquid impact pressure in the pipeline under specific conditions and its influence on the sensor are introduced and verified by experiments,which provides a certain reference for subsequent engineering applications.
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