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Compound material rod moisture expansion coefficient measuring device and measuring method

A technology of wet expansion coefficient and composite materials, which is applied in the directions of electromagnetic measuring devices, material capacitance, electric/magnetic solid deformation measurement, etc., can solve the problems of unmeasured data and limited accuracy, and achieve the effect of high measurement accuracy

Inactive Publication Date: 2019-03-12
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

The accuracy of the three-coordinate measuring instrument used for length measurement is 0.9um, and the accuracy is limited. The contact measurement method will be affected by human operation during the length measurement process; and the experimental environment in which the quality test is located does not have strict humidity control. , and cannot measure data under different humidity environments

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  • Compound material rod moisture expansion coefficient measuring device and measuring method
  • Compound material rod moisture expansion coefficient measuring device and measuring method
  • Compound material rod moisture expansion coefficient measuring device and measuring method

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Embodiment Construction

[0046] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0047] For details, please refer to Figure 1 to Figure 4 Show, figure 1 It is a three-dimensional perspective view of the device for measuring the coefficient of wet expansion of composite rods in the specific embodiment of the present invention; figure 2 yes figure 1 3D stereoscopic view of the medium length measuring system; image 3 yes figure 1 Front view of the medium length measuring system; Figure 4 yes figure 1 Top view of the mid-length measurement system.

[0048] A device 20 for measuring the coefficient of wet expansion of composite rods includes a constant temper...

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Abstract

The invention relates to a compound material rod moisture expansion coefficient measuring device. The measuring device comprises a constant temperature and humidity box, a length measuring system anda weight measuring device; the length measuring system and the weight measuring device are placed on a platform of the constant temperature and humidity box; the length measuring system adopts a capacitive displacement sensor to conduct length measurement on a compound material rod. The invention further provides a compound material rod moisture expansion coefficient measuring method. The measuring device is high in measurement precision, the temperature and the humidity are adjustable, and according to the requirements, moisture expansion performance tests in different humidity environments are carried out.

Description

technical field [0001] The invention belongs to the technical field of material property measurement, and in particular relates to a device for measuring the coefficient of wet expansion of composite material rods. [0002] The invention also relates to a method for measuring the coefficient of wet expansion of the composite material bar. Background technique [0003] Definition of wet linear expansion coefficient: β=△L / (L*△M), where △M is the change in material humidity, △L is the change in material length, and the material humidity M is the moisture concentration of the material. Expressed as a percentage. The humidity characteristics of general materials are water absorption expansion and water loss shrinkage. The physical meaning of β is the linear strain in a body of material per one percent change in humidity. In the case of free expansion, if there is a humidity increment △M at a certain moment, the linear strain increment is β△M. If the deformation of the materia...

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Application Information

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IPC IPC(8): G01N27/22G01B7/16
CPCG01B7/16G01N27/22
Inventor 孙宝龙薛闯
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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