Shock wave pressure testing structure used in explosion near field

Abstract

The invention relates to a shock wave pressure testing structure used in an explosion near field and belongs to the field of explosion tests. The shock wave pressure test structure is a pressure sensor mounting structure and can be put in the explosion near field for a shock wave ground reflection pressure test. The structure comprises an end cover, an upper cover, a pressure sensor, a base, an adhering layer and thermal-insulation grease, wherein the pressure sensor is mounted on the upper cover, and the upper cover is fastened to the base through inner hexagon screws after the upper surface of the base is coated with the adhering layer; the end cover is then screwed to the upper cover, and the overall structure is buried in soil; finally, the end surface of the pressure sensor and the end surface of the upper cover are smeared with the thermal-insulation grease, and end surfaces of the ground, the end cover, the upper cover and the pressure sensor are flush after mounting is completed. The shock wave pressure testing structure is used for the shock wave ground reflection pressure test in the explosion near field, and can control the ratio of the spurious output to a crest value of a shock wave caused by vibration within 6% and solve the problem of abnormal signals caused by vibration, thereby effectively reducing influences on test results from seismic waves and base vibration.

Description

technical field [0001] The invention belongs to the technical field of explosion testing, and in particular relates to a shock wave pressure testing structure. The structure is placed in the explosion near field to obtain a shock wave pressure curve. Background technique [0002] Shock wave pressure is an important basis for consideration in the assessment of blast field power. During the measurement, the pressure sensor feels the impact of the seismic wave and the vibration of the installation base. The output shock wave signal is often superimposed with the vibration signal, especially in the near field of the explosion. The vibration parasitic output is very large, which seriously affects the calculation of the shock wave impulse value. [0003] In the past research work, in order to facilitate the installation and operation, the installation base of the pressure sensor is usually designed as a hollow shape inside, which makes the installation base vulnerable to the influ...

AI Technical Summary

Problems solved by technology

During the measurement, the pressure sensor feels the impact of the seismic wave and the vibration of the installation base, and the output shock wave signal is often superimposed with the vibration signal, especially in the near field of the explosion. The vibration parasitic output is very large, which seriously affects the calculation of the shock wave impulse value.

[0003] In the past research work, in order to facilitate the installation and operation, the installation base of the pressure sensor is usually designed as a hollow shape inside, which makes the installation base vulnerable to the influence of seismic waves, and the output shock wave signal is seriously deformed

Later, the pressure sensor was installed on the component first, and then the component was installed on the installation base through the buffer gasket, which can reduce the impact of part of the vibration, but there will still be a large vibration parasitic output when the shock wave pressure test is carried out in the near field of the explosion.

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