Inclinometer sensor capable of identifying circumferential direction based on fiber bragg grating
A fiber grating and sensor technology, applied in the direction of measuring inclination, instruments, measuring devices, etc., can solve the problems of fiber grating sensor research and application rarely reported, and achieve the effect of simple structure and accurate measurement
Active Publication Date: 2015-07-08
SHANDONG UNIV
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Problems solved by technology
However, there are few reports on the research and application of fiber grating sensors for distinguishable circumferential inclinometers
Method used
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[0047] The present invention will be described in detail below in conjunction with the drawings:
[0048] The appearance schematic diagram of the discernible circumferential tilt sensor based on fiber grating involved in the present invention is as follows: Figure 1-6 Shown. The sensor mainly includes a sensor housing 2, an internal fixing part including a first fixing part 8 and a second fixing part 5, a cantilever beam of equal strength 6, a mass 7, a sensitive grating 9, a temperature compensation grating 10, a sensor upper cover 3 and a sensor base 4. Two equal-strength cantilever beams 6 are fixed in the sensor housing 2 with two internal fixing members. The two equal-strength cantilever beams 6 are respectively attached with sensitive gratings 9 and the bottoms are respectively equipped with masses 7, temperature compensation gratings 10 and One of the sensitive gratings 9 pasted on an equal-strength cantilever beam is connected in series and then pasted to the inner wall...
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The invention discloses an inclinometer sensor capable of identifying circumferential direction based on a fiber bragg grating. The inclinometer sensor capable of identifying the circumferential direction based on the fiber bragg grating comprises a sensor shell. Two pairs of fixed parts are arranged in the shell, each pair of the fixed parts is used for fixing a corresponding constant-strength cantilever beam, the two constant-strength cantilever beams are perpendicular to each other in space but do not make contact with each other, and a quality block is pasted to the bottom of each constant-strength cantilever beam. Two optical fiber pigtails are extracted from the top end of the sensor shell, and the two optical fiber pigtails are connected with an interrogator after being sleeved to hollow protecting pipes. The two constant-strength cantilever beams perpendicular to each other in space generate deformation when the sensor inclines to measure the inclined angle of the sensor in the z-axis direction, and at the same time, through displacements mapped to an x-plane and a y-plane when the constant-strength cantilever beams deform, the inclined directions on the x-plane and the y-plane are measured, so that the inclination measurement capable of identifying the circumferential direction is achieved. The inclinometer sensor capable of identifying the circumferential direction based on the fiber bragg grating is accurate in measurement and simple in structure.
Description
Technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to a fiber grating sensor capable of discerning circumferential tilt measurement. Background technique [0002] Since the 1990s, due to the advantages of being immune to electromagnetic interference, small size, light weight, and long service life, fiber grating sensing technology has developed rapidly. Traditional mobile and fixed inclinometer sensors have been widely used in the monitoring of inclination in various projects. For example, FATavenas proposed the application of inclinometers in geotechnical engineering to detect the lateral deformation of embankment soft soil; Wang Chunxiao adopted three The axis orthogonal acceleration sensor measures the earth's gravity vector and the three axis orthogonal magnetic sensor measures the earth's magnetic field vector to measure the slope. However, traditional inclinometer sensors have major shortcomings, such as drift errors...
Claims
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Login to View More IPC IPC(8): G01C9/00
CPCG01B11/26G01C9/00
Inventor 曹玉强姜明月蒋善超隋青美王静
Owner SHANDONG UNIV