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Optical fiber acceleration transducer probe and acceleration transducer system

A technology of acceleration sensor and optical fiber sensor head, applied in the field of inertial sensors, can solve the problems of weak anti-electromagnetic interference ability, low sensitivity and resolution, small dynamic range, etc.

Inactive Publication Date: 2012-05-23
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of weak anti-electromagnetic interference ability, low sensitivity and resolution, and small dynamic range in the existing acceleration sensor technology, thereby providing a fiber optic acceleration sensor probe and a fiber optic acceleration sensor system based on phase carrier modulation technology

Method used

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  • Optical fiber acceleration transducer probe and acceleration transducer system
  • Optical fiber acceleration transducer probe and acceleration transducer system
  • Optical fiber acceleration transducer probe and acceleration transducer system

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Embodiment 1

[0083] figure 1 It is a schematic block diagram of an embodiment of the optical fiber acceleration sensor system based on phase carrier modulation of the present invention. Such as figure 1 As shown, a fiber optic acceleration sensor system 1000 based on phase carrier modulation of the present invention includes: a laser light source 100 of phase carrier modulation, an input fiber 200, a fiber coupler 300, a transmission fiber 400, a fiber optic acceleration sensor probe 500, and an output fiber 600, a photodetector 700 and an electronic demodulation system 800 for carrier modulation signals. The fiber coupler 300 is connected with the phase carrier modulated laser light source 100, the fiber acceleration sensor probe 500 and the photodetector 700 respectively through the input fiber 200 and the transmission fiber 400 And the output optical fiber 600 is connected. The photodetector 700 is connected with the phase carrier modulation signal electronic demodulation system 80...

Embodiment 2

[0092] figure 2 It is a schematic diagram of the structure of the fiber optic acceleration sensor probe in an embodiment of the phase carrier modulation based fiber optic acceleration sensor system of the present invention, especially the detailed structure of the fiber optic acceleration sensor probe 500 is given.

[0093] Such as figure 2 As shown, in this embodiment, the fiber optic acceleration sensor probe 500 includes an acceleration detection structure 510, back plates 520 and 530, an acceleration sensor frame 541, and a fiber optic sensing head 550.

[0094] The acceleration detection structure 510 includes a detection mass 511 , an elastic vibrating membrane 512 , a support member 513 and a reflective film area 516 on the surface of the detection mass. Wherein the proof mass 511 is located at the center of the acceleration sensor probe 500, its boundary is connected to the inner boundary of the elastic vibrating membrane 512, and the outer boundary of the elastic v...

Embodiment 3

[0104] image 3 It is a schematic block diagram of an embodiment of the differential optical fiber acceleration sensor system based on phase carrier modulation of the present invention. Such as image 3 As shown, a fiber optic acceleration sensor system 1000 based on phase carrier modulation of the present invention includes: a laser light source 100 modulated by phase carrier, an input fiber 200, a fiber coupler 300, transmission fibers 400a, 400b, a fiber optic acceleration sensor probe 500, Output optical fiber 600, photodetector 700, phase carrier modulation signal electronic demodulation system 800.

[0105] The fiber coupler 300 is connected to the phase carrier modulated laser light source 100 through the input fiber 200, connected to the fiber optic acceleration sensor probe 500 through the transmission fibers 400a, 400b, and connected to the optical fiber acceleration sensor probe 500 through the The output optical fiber 600 described above is connected to the photo...

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Abstract

The invention provides an optical fiber acceleration transducer probe and an optical fiber acceleration transducer system based on the phase generated carrier modulation technique. The system comprises a laser light source, optical fibers, a fiber coupler, the optical fiber acceleration transducer probe, a photoelectric detector and an electric demodulating system of phase generated carrier modulating signals, wherein the laser light source is a phase generated carrier modulated laser light source; the fiber coupler is respectively connected with the laser light source, the acceleration transducer probe and the photoelectric detector through the optical fibers; the photoelectric detector is connected with the electric demodulating system of the phase generated carrier modulating signals through wires or cables; and the optical fiber acceleration transducer probe comprises an acceleration detecting structure, at least one back plate, an acceleration transducer frame and at least one fiber sensor head. By adopting a double back plate structure and a fiber reading and detecting method, the system of the invention is improved and enhanced in the aspects of shock resistance and overload resistance performances, anti-electromagnetic interference, sensitivity and the like.

Description

Technical field [0001] The invention involves the technology field of inertial sensor. Specifically, the invention involves a fiber acceleration sensor probe and the fiber -based acceleration sensor system based on phase carrier -based. Background technique [0002] Acceleration sensor is a very important inertial sensing and measurement device, which is widely used in the fields of aerospace, vibration monitoring, industrial control, and earth physical exploration.In recent years, with the development and maturity of MEMS (micro -electrical system) technology, the MEMS acceleration sensor has obtained a lotAnd further expand to the industrial application field with broad market prospects. [0003] The acceleration sensor can measure the acceleration of the outside world by converting the acceleration into a electrical signal at a certain proportion.Traditional acceleration sensors usually consist of sensitive elements, read and amplifier circuits, and metal shells. Its high sens...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P15/03B81B7/02
Inventor 乔东海何庆索智群邓英
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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