Method for measuring elastic deformation variable of leather by using fibre Bragg grating (FBG) sensors
An elastic deformation and sensor technology, applied in the direction of measuring devices, instruments, and optical devices, can solve the problems of less research and application, no unified standard, and lack of standardized vocabulary, so as to reduce equipment costs, reduce measurement errors, and improve performance. stable effect
Inactive Publication Date: 2011-09-28
SHAANXI UNIV OF SCI & TECH
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[0002] The general evaluation of leather sensory characteristics parameters is to follow the sensory inspection method of leather inspectors, touch, stretch, etc. with human hands, and the evaluation results are expressed in language, words or diagrams. There is no unified standard and no standardized vocabulary, so it is difficult to communicate with each other. Or use electrical sensors to achieve single-parameter measurement. From the perspective of foreign sensor development research, FBG sensors have not been studied and utilized in the leather industry, and research and design of multi-parameter simultaneous measurement have rarely been studied and applied.
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[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0015] As shown in the accompanying drawings, the present invention is a method for measuring the elastic deformation of leather using an FBG sensor, which mainly includes measuring the elastic length deformation of the leather due to temperature changes and the length change of the leather due to external tension. The specific implementation steps are:
[0016] In the first step, fix the two ends of the leather sample to be tested with two clips, set the first FBG sensor FBG1 on one of the clips, and set the second FBG sensor FBG2 on the leather sample along its deformation direction;
[0017] The second step is to adjust the temperature change to ΔT, using the first FBG sensor FBG1, according to the formula Δλ 1 =λ×(α+ξ)ΔT to obtain the fiber wavelength change Δλ due to temperature change ΔT 1 , where α is the thermal expansion coefficient of the fiber, ξ ...
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The invention discloses a method for measuring an elastic deformation variable of leather by using fibre Bragg grating (FBG) sensors. The method comprises the following steps of: firstly, fixing two ends of a leather sample to be measured by using two clamps, wherein a first FBG sensor FBG 1 is arranged on one of the clamps and a second FBG sensor FBG 2 is arranged on the leather sample; secondly, adjusting a temperature variable to Delta T to obtain an optical fibre wavelength variable Delta lambda 1 caused by the temperature variable Delta T and obtain a strain Delta epsilon which is further caused by leather deformation due to temperature variation by using the second FBG sensor FBG 2, and further solving a leather length variable Delta L 1; and finally, stretching the two clamps to two sides of the leather sample to obtain a wavelength variable caused by a stretching force, further solving a stretching force Delta F which is applied to the leather, and solving a leather length variable Delta L caused by the stretching force Delta F. By the method, the simultaneous measurement of three parameters of temperatures, the stretching forces and leather fibre stress deformation length variables during leather elastic measurement can be realized; and the comprehensive measurement can be realized, the performance is stable, and the expandability can be obtained.
Description
technical field [0001] The invention belongs to the application field of FBG sensors, and relates to the measurement of leather elasticity, in particular to a method for measuring the elastic deformation of leather by using FBG sensors. Background technique [0002] The general evaluation of leather sensory characteristics parameters is to follow the sensory inspection method of leather inspectors, touch, stretch, etc. with human hands, and the evaluation results are expressed in language, words or diagrams. There is no unified standard and no standardized vocabulary, so it is difficult to communicate with each other. Or use electrical sensors to achieve single-parameter measurement. From the perspective of foreign sensor development research, FBG sensors have not been studied and utilized in the leather industry, and research and design for simultaneous measurement of multiple parameters have rarely been studied and applied. Contents of the invention [0003] In order to ...
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Login to View More IPC IPC(8): G01B11/16G01B11/02
Inventor 王晓霞吴春英王卫林
Owner SHAANXI UNIV OF SCI & TECH