Verification method of bullet velocity measuring instrument

A speedometer and bullet technology, applied in the field of bullet speedometer verification, can solve the problem of no national verification regulations in the field of measurement, and achieve the effects of objective and true verification results, comprehensive verification results, and wide verification scope.

Inactive Publication Date: 2018-05-11
SHANDONG MEASUREMENT SCI RES INST
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  • Abstract
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  • Claims
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Problems solved by technology

However, there is currently no mature method for the verification of bullet speedometers, and there is no national verification procedure in the field of metrology

Method used

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  • Verification method of bullet velocity measuring instrument
  • Verification method of bullet velocity measuring instrument
  • Verification method of bullet velocity measuring instrument

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Embodiment Construction

[0030] The implementation method of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0031] like figure 1 As shown, the bullet speedometer measures speed through the internal light-sensitive trigger device (generally two sets of hollow apertures or light targets). When the measured object passes through the light-sensitive trigger device at high speed, due to When the surface is blocked by the passing object, the back-end electronic device that triggers the light-sensitive trigger device generates a pulse signal (positive pulse or negative pulse).

[0032] When the bullet passes through the first group of light-sensing trigger devices, a trigger signal is generated, which transmits the pulse signal to the time interval measurement unit inside the instrument through the internal signal line of the instrument and triggers the timing of the instrument; when the bullet passes through the second group of light-sensing trigg...

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Abstract

The invention relates to a verification method of a bullet velocity measuring instrument. The method includes a first step of verification of a time interval measuring unit: selecting a high-precisiontime interval measuring instrument, connecting a pulse signal channel of a velocity measuring instrument with a signal channel of the time interval measuring instrument, shooting a gun to let a bullet pass through the velocity measuring instrument, comparing a bullet velocity value V1 measured by the velocity measuring instrument and a bullet velocity value V2 measured by the time interval measuring instrument, and calculating an error value of the time interval measuring unit; and a second step of verification of a receiving processor: selecting a time synthesizer, connecting two channels thereof to two signal input ports of the receiving processor, sending out two pulse signals by using a delay function of the time synthesizer, comparing a bullet velocity value V3 that is simulated by the pulse signals and measured by the velocity measuring instrument and a bullet velocity value V4 that is simulated by the pulse signals and measured by the time synthesizer, and calculating an errorvalue of the receiving processor. The verification result of the invention is more comprehensive, the verification result is objectively true, and the verification range is wide.

Description

technical field [0001] The invention relates to a verification method of a measuring instrument, in particular to a verification method of a bullet speedometer. Background technique [0002] The bullet speedometer is an instrument used to measure the bullet speed of various guns such as pistols, rifles, injection guns, and sports competition guns. It is mostly used in criminal investigation, judicial identification, sports competitions and other fields. Because of the specificity of the field of use, its accuracy will directly affect the fair and smooth progress of judicial work, and it is also a guarantee for the fairness and justice of sports gun competitions. Therefore, it is of great significance to measure and detect bullet speedometers. However, there is currently no mature method for the verification of bullet speedometers, and there is no national verification procedure in the field of metrology. Contents of the invention [0003] Aiming at the above-mentioned te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P21/02
Inventor 管泽鑫李文强杨梅马雪锋王梅洲孙晓研
Owner SHANDONG MEASUREMENT SCI RES INST
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