Vibration signal detection system and detection method
A vibration signal and detection system technology, which is applied in the direction of measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problem that the vibration signal detection system is difficult to achieve vibration signal detection, etc.
Active Publication Date: 2018-06-26
PETROCHINA CO LTD
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[0006] In order to solve the problem that the vibration signal detection system is difficult to realize long-distance vibration signal detection, the present invention provides a vibration signal detection system and detection method
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[0042] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0043] Please refer to figure 1 , which shows a schematic structural diagram of a vibration signal detection system 00 provided by an embodiment of the present invention. The vibration signal detection system 00 may be a vibration signal detection system based on Φ-OTDR technology, which is used to detect vibration around the sensing fiber Signal. see figure 1 , the vibration signal detection system 00 includes: a vibration sensing mo...
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The invention discloses a vibration signal detection system and detection method and belongs to the vibration detection field. The system comprises a vibration sensing module, N excitation signal amplification modules and N+1 detection signal amplification modules; the vibration sensing module, the N excitation signal amplification modules and the N+1 detection signal amplification modules are sequentially connected with one another through an sensing optical fiber; one excitation signal amplification module is disposed between every two adjacent detection signal amplification modules; the vibration sensing module is used for transmitting excitation signals and detection signals; each of the N excitation signal amplification modules is used for amplifying the excitation signals; and each of the N+1 detection signal amplification modules is used for amplifying the detection signal under the excitation of the excitation signals. With the vibration signal detection system and detection method of the invention adopted, a problem that a vibration signal detection system is difficult to realize long-distance vibration signal detection can be solved; and the detection distance of vibration signals is prolonged. The vibration signal detection system and detection method of the invention are used for vibration signal detection.
Description
technical field [0001] The invention relates to the field of vibration detection, in particular to a vibration signal detection system and detection method. Background technique [0002] In the fields of large-scale engineering structure health monitoring, oil pipeline protection, and geological disaster prevention, it is often necessary to use vibration signal detection systems to detect vibration signals around target objects (such as oil pipelines). The vibration signal detection system can be a vibration signal detection system based on phase-sensitive optical time domain reflectometer (English: Phase-sensitive Optical Time-Domain Reflectometer; abbreviation: Φ-OTDR) technology. This system has the characteristics of high positioning accuracy and high sensitivity and is widely used. It is used in fence intrusion detection, long-distance oil and gas pipeline detection, border security and other fields. Among them, Φ-OTDR technology is also called optical time domain refl...
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IPC IPC(8): G01H9/00
CPCG01H9/004
Inventor 田孝忠王雪莉谭东杰刘路王海明孙巍邱红辉周琰蔡永军孟佳
Owner PETROCHINA CO LTD