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Non-contact type impact wave hyperpressure measuring method

A non-contact, measurement method technology, applied in the direction of measuring device, blasting force measurement, ultrasonic/sonic wave/infrasonic wave, etc., can solve the problems of large shock wave overpressure error, result deviation, and influence on shock wave overpressure propagation, etc., to achieve measurement Accurate, operationally safe results

Inactive Publication Date: 2013-09-11
THE THIRD ENG CORPS RES INST OF THE HEADQUARTERS OF GENERAL STAFF PLA
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Problems solved by technology

However, these two methods are limited by the test conditions. The method of direct measurement by the preset pressure sensor can only obtain the shock wave overpressure value on a few characteristic points, and due to the characteristics of the shock wave, when encountering obstacles, reflection overpressure will occur. Therefore, if the sensor setting method is improper, it may also affect the propagation of the shock wave overpressure, which will cause a large error in the measured shock wave overpressure
The empirical formula calculation method is mainly for the calculation of the explosion shock wave of the group charge, and it cannot be counted for the consumption of scattered charges or the explosive energy of the charge is also used for other forms of work, and the calculation results are prone to large deviations

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[0022] In order to make it easier for those skilled in the art to understand and implement the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] In order to overcome the shortcomings of the existing shock wave overpressure measurement method, the present invention provides a non-contact measurement method, which can directly observe the propagation process of the air shock wave, and realize the measurement of the air shock wave propagation velocity and overpressure generated by the explosion of various charge structures , its specific scheme is as figure 1 As shown, the high-speed camera 1 is set up in a safe position without any line of sight, and there is a sufficient safety distance between the charge structure 2, such as 140m, or the high-speed camera 1 is set up in a non-safety area affected by the explosion, But take enough protective measures for the high-sp...

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Abstract

The invention relates to a non-contact type impact wave hyperpressure measuring method. A high-speed photographic device and a loading structure are triggered synchronously, the high-speed photographic device is used for shooting the whole process of blasting of the loading structure; according to the shooting speed set by the high-speed photographic device, two adjacent frames of images shot by the high-speed photographic device before and after a given moment are analyzed, the moving speed of the wave front of impact waves generated by blasting of the loading structure is determined; according to impact wave compatibility relation and an impact wave adiabatic equation of polytropic gases, corresponding impact wave hyperpressure is obtained by computing through the moving speed of the wave front of the impact waves. According to the non-contact type air impact wave hyperpressure measuring method, errors brought by a traditional measuring method are avoided, measuring is safe, data are reliable, operation is convenient, and measured data can be verified by high-speed video playback.

Description

technical field [0001] The invention relates to a shock wave overpressure measurement method, in particular to a non-contact air shock wave overpressure measurement and calculation method. Background technique [0002] When studying the performance and detonation effect of explosives, the shock wave overpressure generated by the detonation is a very important consideration parameter. In traditional theoretical and experimental research, it is generally obtained by direct measurement of preset pressure sensors and calculation of empirical formulas. However, these two methods are limited by the test conditions. The method of direct measurement by the preset pressure sensor can only obtain the shock wave overpressure value on a few characteristic points, and due to the characteristics of the shock wave, when encountering obstacles, reflection overpressure will occur. Therefore, if the sensor setting method is improper, it may also affect the propagation of the shock wave overp...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/14G01H9/00
Inventor 任辉启易治任王军徐流恩高超伍俊穆朝民林加剑
Owner THE THIRD ENG CORPS RES INST OF THE HEADQUARTERS OF GENERAL STAFF PLA
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