Distributed optical fiber vibration sensor based on relay amplifying and sensing technology and method thereof

A distributed optical fiber and vibration sensor technology, applied in optics, instruments, light demodulation, etc., can solve problems such as inability to achieve accurate positioning, and achieve the effects of enhancing confidentiality, increasing measurement distance, and improving vibration measurement accuracy.
CN101839760AInactive Publication Date: 2010-09-22SHANGHAI BOOM FIBER SENSING TECH
0 Cites 28 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI BOOM FIBER SENSING TECH
Publication Date
2010-09-22
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a distributed optical fiber vibration sensor based on the relay amplifying and sensing technology and a method thereof, belonging to the technical field of optical fiber vibration sensing. The system comprises a light source, an electro-optical modulator, a pulse driver, a light amplifier, a circulator, a polarizing beam splitter, a collector and a signal analysis processing system. The sensor is characterized in that the system also comprises a pumping laser light source and an optical remote sensing relay amplifying and sensing optical module. The pumping laser light source is arranged in the distributed optical fiber vibration sensing demodulation device and the optical remote sensing relay amplifying and sensing optical module is embedded between multistage sensing fibers. The passive optical modules of the pumping laser light source and optical remote sensing relay amplifying and sensing optical module perform long-distance connection through transmission fiber to form the light amplifier, the gain of the optical remote sensing relay amplifying and sensing optical module is utilized to overcome fibre loss, increase the intensity of the spontaneous Rayleigh scattering light of the optical fibre, enhance the signal-to-noise ratio of the distributed optical fiber vibration sensing system, enlarge the transmission distance of the system and increase the measurement accuracy of vibration events in the target area. The system is mainly used in the fields requiring long-distance measurement vibration signals such as perimeter safety precaution, border precaution, seismic detection and tsunami early warning.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of distributed optical fiber vibration sensing, in particular to a distributed optical fiber vibration sensor based on relay amplification sensing technology. The invention also relates to a vibration sensing method of a distributed optical fiber vibration sensor based on relay amplification sensing technology. Background technique

[0002] Sensing and alarming systems such as perimeter security, border protection, earthquake detection, and tsunami early warning play a huge role in ensuring the stability of people's lives and protecting the safety of people's lives and property, and the essence of such signals is the detection and analysis of vibration signals. With the development of optical devices and optical communication technology, more and more optical fiber sensing technology is used in the field of sensing, gradually replacing some traditional electrical sensors.

[0003] At present, distributed optical fibe...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More