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Method for enhancing propellant drug strip combustion sound signal reception strength

A technology of receiving strength and acoustic signal, applied in the direction of processing the response signal of detection, etc., can solve the problems of weak acoustic signal and inability to obtain test results, and achieve the effect of improving flame retardant safety, simple method and convenient operation.

Active Publication Date: 2015-06-17
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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AI Technical Summary

Problems solved by technology

However, when this method is used to detect propellants with low burning rate and low burning temperature, accurate test results are often not obtained due to the weak acoustic signal of propellant rod combustion

Method used

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  • Method for enhancing propellant drug strip combustion sound signal reception strength

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Embodiment Construction

[0012] Combine below figure 1 The examples provided are divided into five parts to further illustrate the invention.

[0013] First, structural components.

[0014] The device structure of the embodiment of the present invention consists of a combustion chamber (1) and an acoustic signal acquisition mechanism (2).

[0015] The combustion chamber (1) comprises: a medicine bar seat (3), and a combustion inner wall (4).

[0016] The acoustic signal acquisition mechanism (2) includes: an acoustic probe (5), an acoustic collecting mechanism (6), an acoustic reflection baffle (7), an acoustic

[0017] Absorbing layer (8), sound-absorbing rubber sheet (9), sound-absorbing silicone grease (10), tested drug strip (11).

[0018] Second, the test conditions.

[0019] According to the provisions of the Chinese military standard "Gunpowder Test Method" GJB770B-2005, the solid propellant rod burning rate test is carried out in a small combustion chamber, and the signal collection method...

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Abstract

The invention relates to a method for enhancing the propellant drug strip combustion sound signal reception strength. A sound signal acquisition mechanism is provided with a sound collection mechanism, the sound collection mechanism is composed of a sound reflection baffle plate and a sound absorption layer, the sound reflection baffle plate is arranged on the drug strip seat of a combustion chamber, and the sound absorption layer is arranged on the inner wall of the combustion chamber. The sound absorption layer is composed of a sound absorption rubber sheet and sound absorption silicone grease, the sound absorption rubber sheet is arranged on the inner wall of the combustion chamber arranged at a sound probe, and the sound absorption silicone grease is arranged on the sound absorption rubber sheet. The sound absorption rubber sheet adopts polytetrafluoroethylene and an epoxy resin, and the sound absorption silicone grease adopts nonflammable vacuum silicone grease, Vaseline and butter lipids. An apparatus for realizing the method utilizes the sound reflection baffle plate to reflect a trickle drug strip combustion sound signal, the sound absorption layer to enhance the absorption of the drug strip combustion sound signal, and the sound absorption rubber sheet and the sound absorption silicone grease to form a sound absorption double-matching layer, can be widely used for low-combustion-speed and low-combustion-temperature propellant detection, has a rapid signal reflection effect and a dual enhancement effect, and has the advantages of simple structure, reliable performances, use safety, and good detection repeatability.

Description

Technical field [0001] The invention relates to a technology for detecting the performance of energetic materials, in particular to a method for enhancing the receiving intensity of the combustion sound signal of propellant powder. Background technique [0002] According to the provisions of the Chinese military standard "Gunpowder Test Method" GJB770B-2005, in the prior art, the nitrogen acoustic emission method is usually used to test the burning rate of propellant rods, which is simple, widely used, and has high test efficiency. However, when this method is used to detect propellants with low burning rate and low burning temperature, accurate test results cannot be obtained because the acoustic signal of propellant rod burning is weak. Contents of the invention [0003] The object of the present invention is to provide a method for enhancing the receiving strength of the sound signal of propellant rod combustion, which can effectively reduce the transmission attenuation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/44
Inventor 冯勇倪凤祥石东景王志强
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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