Three-dimensional FBG accelerometer based on flexible hinge and its manufacturing process
A flexible hinge and accelerometer technology, applied in the direction of acceleration measurement using inertial force, can solve the problems of unfavorable access to the sensor network, large size, poor accuracy, etc., and achieve wide application range, small size, and high accuracy Effect
Active Publication Date: 2021-06-04
WUHAN UNIV OF TECH
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[0005] The purpose of the present invention is to overcome the defects and problems existing in the prior art, such as poor accuracy, large volume, and unfavorable access to the sensor network, and provide a sensor with high accuracy, small volume, and favorable access to the sensor network. Three-dimensional FBG accelerometer based on network flexible hinge and its manufacturing process
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[0043] see figure 1 - Figure 4 , a three-dimensional FBG accelerometer based on flexible hinges, including a sensor housing 2 with a hollow structure and a sensing unit 4 disposed inside thereof, the top and bottom of the sensor housing 2 are respectively connected to the sensor housing cover 1 and the sensor base 3 connected, and a fiber grating 8 (preferably FBG) is set on the sensing unit 4; the sensing unit 4 includes an X-direction metal sensing core 5, a Y-direction metal sensing core 6 and a Z-direction metal sensor The sensing core 7, the metal sensing core 5 in the X direction, and the metal sensing core 6 in the Y direction are located on the same horizontal plane, the metal sensing core 5 in the X direction, and the metal sensing core 6 in the Y direction are perpendicular to each other, and the metal sensing core 6 in the Z direction is perpendicular to each other. The sense core body 7 is perpendicular to the horizontal plane where the metal sensing core body 5 ...
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A three-dimensional FBG accelerometer based on flexible hinges, including a sensor housing, a sensing unit and a single fiber grating, preferably FBG, the sensing unit includes X, Y, Z direction metal sensing core, X, Y The metal sensing cores in the Z direction are vertically connected to each other and are located on the same horizontal plane. The metal sensing cores in the Z direction are perpendicular to the metal sensing cores in the X and Y directions. The three metal sensing cores are all composed of bases, hinges, The flexible hinge structure of the mass block, one end of a single fiber grating is located outside the sensor housing, and the other end passes through the No. 1 fiber hole, X-quality groove, X-base groove, Y-base groove, and Y-quality groove in sequence , Z-quality groove, Z-base groove, and the second fiber hole extend to the outside of the sensor housing. This design not only has high precision and small volume, but also facilitates access to the sensor network, making it easy to manufacture and use.
Description
technical field [0001] The invention relates to an accelerometer, which belongs to the technical field of optical fiber sensing, in particular to a three-dimensional FBG accelerometer based on a flexible hinge and a manufacturing process thereof. Background technique [0002] As one of the more popular high-tech, fiber grating has a series of unique advantages compared with traditional sensors, such as small size, light weight, high precision, passive, anti-electromagnetic interference, good long-term stability, With the help of optical fiber carriers, long-distance signal transmission, etc., have great application prospects in the fields of aerospace, national defense construction, energy, industrial production, and daily life. At the same time, in some special applications, such as aircraft in the aerospace field, long-range missile guidance and control in the military field, automobile safety detection, automobile safety protection systems, robots and other special fields...
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IPC IPC(8): G01P15/03
Inventor 梁磊周雄兵蔡彦璞易铮朱振华徐刚南秋明王慧吴慧峰
Owner WUHAN UNIV OF TECH