Optical sensing based impulse testing method and device

Abstract

The invention relates to an optical sensing based impulse testing method and a device. The optical sensing based impulse testing method is characterized by comprising the following steps that: a guide rail is arranged along the tested impulse direction, a mass block capable of moving along the impulse direction is arranged on the guide rail, a linear raster is fixed at the side of the mass block, and a measurement device is arranged on the guide rail to measure a reflection light intensity-time curve of the linear raster, thereby impulse parameters are calculated. In the device, the pulse impulse parameters are measured by optical sensing, so that the anti-electromagnetic interference capability of a testing system is improved; the low-loss characteristics of optical fiber are utilized to realize the long-distance transmission of measurement signals so as to ensure the safety of a light source, an optoelectronic converter and other devices; the device can be applied to explosion and radiation field, and other special occasions, the testing range, resolution and the like can be changed by adjusting the weight of the mass block, the length of the linear raster, a line space and other parameters according to the tested object, and the method is adapted to the measurement requirements of different occasions and different parameters; and a testing probe has a small volume and a compact structure, and is convenient to install and disassemble.

Description

technical field [0001] The invention relates to an impulse test method, in particular to a method and device for measuring pulse impact load based on optical sensing. Background technique [0002] Impulse is one of the parameters to measure the mechanical effect of impact load on shell structures such as containers. The traditional test method is to test the pressure value of the impact load, and then integrate the pressure value with time to obtain the impulse. Due to the characteristics of short time (ns ~ ms level) and high pressure peak value (MPa ~ GPa level) of the pulse shock load, it is very difficult to accurately test the time history curve of the pressure value due to the limitation of the frequency response and precision of the pressure sensor. Yes, traditional impulse testing methods are limited. [0003] Currently, there are two main methods for impulse testing of impulse impact loads: [0004] (1) Impact pendulum method. [0005] Shock pendulum is an effec...

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Problems solved by technology

[0006] However, the problem with the impact pendulum method is that the commonly used impact pendulum is a typical compound pendulum model, which is large in size and complex in design, processing and data processing.

Common speed measurement systems are generally realized by traditional electrical measurement technology, and pulse shock loads, such as chemical explosions, X-ray radiation sources, etc., are usually accompanied by strong electromagnetic interference, which is easily coupled into the test circuit, thus affecting the test. The accuracy and reliability of the signal may even cause the test circuit to fail to work properly

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