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Sensitivity-enhanced FBG acceleration sensor based on flexible hinge and measurement method

A technology of acceleration sensor and flexible hinge, which is applied in the field of sensor measurement, can solve the problems of insufficient research on acceleration sensors and achieve the effect of eliminating temperature changes

Pending Publication Date: 2020-12-01
INST OF GEOPHYSICS CHINA EARTHQUAKE ADMINISTRATION
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Problems solved by technology

[0004] In recent years, domestic scholars have designed various forms of FBG acceleration sensors based on the principle of FBG strain sensing. However, the research on acceleration sensors suitable for medium and high frequency fields is still insufficient for low frequency fields.

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  • Sensitivity-enhanced FBG acceleration sensor based on flexible hinge and measurement method
  • Sensitivity-enhanced FBG acceleration sensor based on flexible hinge and measurement method
  • Sensitivity-enhanced FBG acceleration sensor based on flexible hinge and measurement method

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Embodiment Construction

[0033] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0034] It should be noted that the terminology used herein is only for describing specific embodiments, and is not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0035] In the case of no conflict, the embodiments in the present disclosure and the features in the embodiments can be combine...

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Abstract

The invention provides a sensitivity-enhanced FBG acceleration sensor based on a flexible hinge and a measurement method. The sensitivity-enhanced FBG acceleration sensor comprises a base, an elliptical flexible hinge with an inertial mass block and a fiber bragg grating, the base is composed of two side walls and a connecting structure located between the two side walls. Elliptical flexible hinges and inertia mass blocks are arranged between the two side walls at intervals, fiber bragg gratings are pasted between the upper surfaces and the lower surfaces of the two mass blocks in the middle respectively, and the connecting structure of the fiber bragg gratings on the lower surfaces and the base is in a non-contact state. According to the technical scheme, due to middle hinge connection, simultaneous vibration of the two mass blocks and opposite deformation directions of the two ends of the upper gratings and the lower gratings, the sensitivity multiplication effect can be achieved, and influences caused by temperature changes can be eliminated.

Description

technical field [0001] The disclosure belongs to the technical field of sensor measurement, and in particular relates to a flexible hinge-based intensified FBG acceleration sensor and a measurement method. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Microseismic monitoring is widely used in petroleum engineering, nuclear waste treatment, dams, and the prevention and stability monitoring of dangerous structures. Compared with conventional seismic signals, its signals have the characteristics of weak energy, high frequency, and easy absorption. It puts forward higher requirements on the acquisition of its signals. Compared with traditional electrical acceleration sensors, Fiber Bragg Grating (FBG) acceleration sensors have attracted more and more attention because of their small size, light weight, anti-electromagnetic interference, co...

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Application Information

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IPC IPC(8): G01P15/03
CPCG01P15/032
Inventor 滕云田邱忠超吴琼王晓美胡星星李彩华吴燕雄
Owner INST OF GEOPHYSICS CHINA EARTHQUAKE ADMINISTRATION
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