High-range dynamic pressure measuring apparatus and measuring method thereof

Abstract

The invention relates to the field of the pressure sensor technology, particularly to a dynamic pressure measuring apparatus and measuring method thereof. The apparatus comprises a membrane, a membrane measuring probe, and a barrel. The membrane is installed at one end of the barrel and is in a clearance fit relation with the inner wall of the barrel. The membrane measuring probe is installed at the other end of the barrel and is connected with a signal recorder. Therefore, technical problems that the range of the existing pressure sensor is small and the sensor is easily affected by the electro magnetic interference can be solved. According to the invention, pressure measurement is completed by establishing the relationship between the membrane motion parameter and the impact pressure based on measurement of the motion parameters of the membrane instead of using the conventional relationship between the membrane deformation value and the pressure. On the basis of technologies of the optical interference, the measuring apparatus has advantages of simple working principle, low cost, fast frequency response, and high anti-electromagnetic radiation capability and a novel path is provided for transient pressure measurement.

Description

technical field

[0001] The invention belongs to the technical field of pressure sensors, and in particular relates to a dynamic pressure measuring device and a measuring method thereof. Background technique

[0002] In a strong impact environment, dynamic pressure measurement is a routine test item. Accurate measurement of pressure history is helpful to judge the characteristics of impact load, which has important reference value for weapon manufacturing, protection engineering and other fields. In particular, for shock wave pressure measurement, the pressure sensor is required to have the characteristics of fast frequency response, wide frequency band range, and high measurement range.

[0003] At present, the commonly used dynamic pressure sensors are piezoelectric, piezoresistive, and pressure rod (traveling wave rod method), etc., and the existing commercially available high-frequency dynamic pressure sensors are all piezoelectric types, and the rise time is generally gr...

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