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Polymer Encapsulated Grating Sensor and Correction Method for Viscoelastic Effect of Sensor

A grating sensor and viscoelastic technology, applied in the field of sensors, can solve the problems of low fracture toughness and limited elastic elongation of sensors, and achieve the effects of improving toughness, multiplexing, and expanding the measurement range

Active Publication Date: 2021-02-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims at the shortcomings of limited elastic elongation and low fracture toughness of the sensor in the prior art, and discloses a polymer-encapsulated grating sensor. The sensor of the present invention is provided with a large deformation unit with large deformation capacity and can withstand large elongation ; The present invention also discloses a correction method for the viscoelastic effect of a general sensor, which meets the accuracy requirements of the large displacement measurement of the sensor

Method used

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  • Polymer Encapsulated Grating Sensor and Correction Method for Viscoelastic Effect of Sensor
  • Polymer Encapsulated Grating Sensor and Correction Method for Viscoelastic Effect of Sensor
  • Polymer Encapsulated Grating Sensor and Correction Method for Viscoelastic Effect of Sensor

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Embodiment 1

[0051] Such as figure 1 as shown, figure 1 It is a schematic diagram of a polymer-encapsulated optical fiber grating sensor adopting an adhesive surface-mounted packaging method. The polymer-encapsulated optical fiber grating sensor of the present invention includes a left fixed end 1, a large deformation unit 2, a first adhesive 3, a grating packaging unit 4, a second 2 Adhesive 5, integrated grating demodulator 6, strain test grating 7, temperature test grating 8, right fixed end 9, optical fiber 10.

[0052] Among them, the deformation member is composed of the left fixed end 1, the large deformation unit 2, the grating encapsulation unit 4, and the right fixed end 9; the first adhesive 3, the second adhesive 5, the grating encapsulation unit 4, the strain test grating 7, the temperature The test grating 8 forms a test component, and the integrated grating demodulator 6 and optical fiber 10 form a grating demodulation system.

[0053] Such as figure 2 as shown, figure...

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Abstract

The invention discloses a polymer packaged grating sensor and belongs to the field of sensors. The polymer packaged grating sensor comprises a deformation member, a test member and a grating demodulation system, wherein the deformation member comprises a left fixed end, a large deformation unit, a grating package unit and a right fixed end; the test component comprises a grating package unit, a strain test grating and a temperature test grating; and the grating demodulation system comprises an integrated grating demodulator and an optical fiber. The polymer packaged grating sensor of the invention combines a large deformation unit with large deformation capability, which can satisfy accurate measurement of large displacement. The invention also discloses a correction method for sensor viscoelastic effect. The method corrects the viscoelastic effect error in the sensor test process by means of a uniaxial tensile test and the convolution algorithm. The viscoelastic effect correction method of the invention can meet the correction requirement of the viscoelastic effect error in the polymer packaged grating sensor and the general sensor test process, and improve the sensor test accuracy and measurement range.

Description

technical field [0001] The invention relates to the field of sensors, in particular to polymer-encapsulated optical fiber grating sensors, in particular to polymer-encapsulated grating sensors and a correction method for the viscoelastic effect of general sensors. Background technique [0002] Fiber Bragg grating sensor is a new type of optical fiber sensor, which has the advantages of high sensitivity, anti-electromagnetic interference, small size, light weight, etc., and has broad application prospects in strain measurement and temperature measurement. At present, fiber grating sensors have been widely used in aerospace, civil engineering, transportation and other fields. However, the fiber grating sensor is limited by its material properties, and has defects such as small elastic deformation limit (1-3%), brittleness, and poor toughness, so that the fiber grating sensor can neither measure large extension deformation nor withstand harsh conditions. test environment. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D21/02
CPCG01D21/02
Inventor 吴奇翟宏州熊克王容芦吉云
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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