Optical fiber acoustic emission system for monitoring damage and destruction process of explosive and monitoring method thereof

An emission system, fiber optic acoustic technology, which is used in material analysis using sonic emission technology, measuring devices, and material analysis using sonic/ultrasonic/infrasonic waves, etc. Effect

Pending Publication Date: 2018-06-22
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to propose a fiber optic acoustic emission system and its monitoring method for monitoring the damage and destruction process of explosives in view of the potential safety hazards that may exist in the use of piezoelectric resonance acoustic emission sensors for charge leakage in the monitoring of explosive damage

Method used

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  • Optical fiber acoustic emission system for monitoring damage and destruction process of explosive and monitoring method thereof
  • Optical fiber acoustic emission system for monitoring damage and destruction process of explosive and monitoring method thereof
  • Optical fiber acoustic emission system for monitoring damage and destruction process of explosive and monitoring method thereof

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Embodiment

[0033] a kind of like figure 1 The optical fiber acoustic emission system for monitoring the damage and destruction process of explosives includes an acoustic emission sensor, a photoelectric conversion device and a signal acquisition processor; the acoustic emission sensor is a fiber Bragg grating 6; the photoelectric conversion device is composed of a tunable narrowband Composed of a laser 1 and a photodetector 3, the fiber Bragg grating is connected to the tunable narrowband laser and the photodetector through an optical fiber 4; the photodetector is connected to a signal acquisition processor through a signal line 7. A fiber circulator 2 is arranged between the fiber Bragg grating, the tunable narrowband laser and the photodetector. The signal acquisition processor is composed of a computer 9 with a preamplifier 8 and a built-in acquisition card. The photodetector is first connected with the preamplifier through a signal line, and then the preamplifier utilizes the signal ...

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Abstract

The invention discloses an optical fiber acoustic emission system for monitoring a damage and destruction process of an explosive and a monitoring method thereof. A fiber Bragg grating is adopted as an acoustic emission sensor to replace traditional piezoelectric resonant acoustic emission sensors, and a tunable narrowband laser and a photodetector are used as a photoelectric conversion device. The optical fiber acoustic emission system is used for monitoring fracture and destruction of the polymer bonded explosive in the optical fiber acoustic emission monitoring method. Monitoring and analysis are carried out by taking a three-point bending fracture and destruction test of an explosive specimen as an example. The optical fiber acoustic emission system has a microsecond response speed andcan accurately monitor the time history of internal energy release amount in the explosive damage and destruction process and provide a data support for mastering a damage and destruction law of theexplosive.

Description

technical field [0001] The invention relates to the technical field of material performance testing, in particular to an optical fiber acoustic emission system and a monitoring method for monitoring the damage and destruction process of explosives. Background technique [0002] Polymer bonded explosive is a kind of particle bonded structure formed by warm pressing. It is easy to damage and destroy due to its low mechanical strength during long-term storage. Accurately grasping the damage evolution law of explosives is the key to revealing the damage mechanism of bonded structure of complex explosive particles. Base. In the prior art, the test methods suitable for on-line monitoring of explosive damage evolution are mainly stress-strain method, digital image correlation method and acoustic emission. The stress-strain method is only suitable for the mechanical load failure of regular standard specimens; the image correlation method can only observe the surface of the specimen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/14G01N29/24
CPCG01N29/14G01N29/2418
Inventor 付涛温茂萍周红萍韦兴文王培张巍耀甘海啸
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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