Instrument for measuring explosive velocities

Abstract

The invention relates to an instrument for measuring explosive velocities. The instrument comprises a plurality of probes with photosensitive diodes and a crystal oscillation timer with an LED display screen. Each probe with the photosensitive diode comprises the photosensitive diode and a probe circuit, one end of each probe circuit is connected with the corresponding photosensitive diode by an enameled wire, the multiple probes with the photosensitive probes are sequentially fixed to the surface of an explosive column along the axial direction of the explosive column, a photosensitive surface of each photosensitive diode clings to the surface of the explosive column, light-tight black insulating rubber tapes completely wrap the photosensitive diodes on the surface of the explosive column, a plurality of acquisition interfaces are arranged on the crystal oscillation timer and are respectively connected with leg wires of the enameled wires by cables, and the leg wire of each enameled wire is arranged at the other end of the corresponding probe circuit. The instrument has the advantages that change of the density and mechanical packaging states of the explosive column can be prevented, the instrument is high in electromagnetic interference resistance and convenient to mount and can be used for measuring the explosive velocities when explosive explodes in underwater environments, and the adhesion positions of the instrument can be flexibly changed.

Description

technical field [0001] The invention relates to an instrument for measuring the detonation velocity of explosives, in particular to a device capable of resisting electromagnetic interference and measuring the detonation velocity of explosives underwater. Background technique [0002] At present, there are three commonly used measurement methods for explosive detonation velocity: high-speed photography, detonating cord method and electrical measurement method (probe method). The disadvantage of the high-speed photography method is that the operation of the instrument is complicated, the equipment is expensive, and the test conditions are relatively high, which can only be completed in a special laboratory; the test accuracy of the detonating cord method depends on the detonation velocity value of the detonating cord, so the test accuracy is not enough. The degree is low, and it is not easy to explain the problem objectively; the electric measurement method cannot determine th...

AI Technical Summary

Problems solved by technology

The disadvantage of the high-speed photography method is that the operation of the instrument is complicated, the equipment is expensive, and the test conditions are relatively high, which can only be completed in a special laboratory; the test accuracy of the detonating cord method depends on the detonation velocity value of the detonating cord, so the test accuracy is not enough. The degree is low, and it is not easy to explain the problem objectively; the electric measurement method cannot determine the precise position of the ionization, and thus cannot accurately determine the start and end time of the timing, which seriously affects the test accuracy, and the electric probe is not sensitive to the weak ionization signal in the case of strong electromagnetic interference. Difficult to collect, because the electric probe is susceptible to the interference of the space electromagnetic field, especially the high ionization degree of the detonation product in the detonation test, making it unusable in a strong electromagnetic environment

The original state of the drug roll is easy to be destroyed when the traditional needle is threaded, and the density of the drug body changes. Especially for the drug roll packaged in plastic film, the relative error of the target distance is relatively large, resulting in a decrease in the accuracy of the test results.

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