Mounting method of device for testing pressure at different depths under impact of explosives and powders

Abstract

The invention discloses a mounting method of a device for testing pressure at different depths under the impact of explosives and powders. According to the method, all testing components are fixed through a testing support, and reliable positioning of all the components is guaranteed; a powder column to be tested, manganin piezoresistive sensors, a partition plate, a loaded powder column, a plane wave generator and a booster explosive are placed between a lower fixing plate and an upper fixing plate from bottom to top, screws and nuts are used for squeezing and fixing, and no air gaps exist between all the components. The method is applied to mounting the device for testing the pressure at different depths under the impact of the various explosives and powders, all the components are reliably fixed and positioned, and the accuracy of test measuring results is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of explosives, and in particular relates to a method for installing pressure testing devices at different depths under the impact of explosives. The method realizes reliable positioning of test components in a cheap and simple manner. Background technique [0002] Studying the shock initiation and detonation growth process of propellant and explosive has important guiding significance for the safety, reliability and formula design of propellant and explosive. The whole process of explosives from low-pressure shock initiation to steady-state detonation belongs to the category of detonation dynamics and is an important direction in the field of detonation, and the pressure measurement of explosives at different depths under impact is the main method of this research . At present, there is no relevant standard test device and installation method for pressure measurement at different depths under the impact of ...

AI Technical Summary

Problems solved by technology

[0003] (1) There are potential safety hazards in the test assembly. Detonators, boosters, plane wave generators, loaded grains, partitions, grains to be tested, sensors, etc. are simply superimposed together, and the contact surfaces can move freely. Easy to fall and dangerous;

[0004] (2) The sensor is not in close contact with the drug column to be tested, and there is an air gap, which affects the measurement result;

[0005] (3) The concentricity of the components cannot be guaranteed, especially if the sensitive part of the sensor is not in the center of the grain to be tested, the measurement result will be affected by the lateral sparse wave;

[0006] (4) The grounding of the measurement device makes it difficult to interpret the signal. When multi-channel measurement is performed in the same system, a strong interference signal will be generated after the sensor is damaged by the lateral sparse wave, and the "common ground" output of the pulse constant current source causes mutual If the interference is serious, there will be error signals such as signal leading edge deterioration, abnormal amplitude and reverse polarity

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