The reaction rate of an explosive – also called detonation velocity – is the easiest parameter to measure, and also one of the most important in characterizing the process of detonation front propagation in a 1D approach. This paper presents some peculiarities that were observed during the testing of our passive/active optical methods to measure detonation velocity. Both methods were tested using bare optic fiber probes and optic fiber probes protected with a stainless steel tube. The active optical method uses a laser with a wavelength of 660 nm, and the recording system contains a window filter that blocks any radiation outside the wavelength range of 650 to 665 nm. A plastic‐bonded explosive based on PETN (seismoplast) was used to test both experimental methods. For rectangular cross‐section charges using the passive optical method with the two different probes, the detonation velocities obtained ranged from 7233 to 7324 m/s, with standard deviations between 1.1 and 6.0 %; for the active optical method, the experimental results for detonation velocity varied between 7261 and 7351 and were obtained with a standard deviation of 0.6 to 1.7 %.

中文翻译：

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主动和被动光纤计量，用于爆速测量

炸药的反应速率（也称为爆轰速度）是最容易测量的参数，也是表征一维方法爆轰前沿传播过程中最重要的参数之一。本文介绍了在测试我们的被动/主动光学方法以测量爆震速度时观察到的一些特性。两种方法均使用裸光纤探头和用不锈钢管保护的光纤探头进行测试。主动光学方法使用波长为660 nm的激光，并且记录系统包含一个窗口滤光片，该滤光片可以阻挡650至665 nm波长范围之外的所有辐射。基于PETN（地震塑料）的塑料粘结炸药用于测试这两种实验方法。对于使用两种不同探针的无源光学方法进行的矩形截面装药，其爆轰速度范围为7233至7324 m / s，标准偏差为1.1至6.0％。对于有源光学方法，爆轰速度的实验结果在7261和7351之间变化，并且标准偏差为0.6至1.7％。