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Device for measuring real contact area and viscous effect of contact surface and measuring method thereof

A technology of contact area and contact surface, which is applied in the direction of measuring devices, mechanical area measurement, and mechanical devices, etc., can solve the problems of small contact images, blurred boundaries of contact spots, and no related reports, etc., and achieve good contact results

Inactive Publication Date: 2007-08-01
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now, there are also some ideas and methods for directly measuring the real contact area of ​​the contact surface: for example, using an ultrasonic microscope together with other auxiliary test devices to measure the real contact area of ​​the contact surface, studies have shown that acoustic microscopy is a feasible method for measuring the real contact area , but it needs to be further studied and perfected as a quantitative measurement method; in addition, the total optical reflection method is also a common method to measure the real contact area, but the contact image measured by it is small and the boundary of the contact spot is blurred , and can only be used in contact with light-transmitting materials
In addition, there is no relevant report on the measurement of adhesion effect

Method used

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  • Device for measuring real contact area and viscous effect of contact surface and measuring method thereof

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Embodiment Construction

[0018] As shown in Figures 1 and 2, the device of the present invention includes a vibration isolation pad 1, a motor 2, a string 3, a fixed pulley 4, a support 5, a tension sensor 6, an upper sample 8, a lower sample 9, a spherical hinge 10 and data acquisition device. Wherein, the data acquisition device includes an amplification circuit 11 , an analog-to-digital conversion card 12 , a computer 13 and wires 7 .

[0019] The working principle is: when the surface of the upper sample and the lower sample are in good contact, the motor 2 is started, driven by the string 3, the upper sample 8 is slowly lifted at a constant speed through the fixed pulley 4 and the tension sensor 6 fixed on the bracket 5 , through the tension sensor 6 connected to the string to instantly sense the change in tension on the string, and the value of the change in tension will be transmitted to the data acquisition device. The lower sample 9 is fixed on the base of the bracket. In order to ensure tha...

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Abstract

This invention discloses one device to test contact surface real area and adhesive effect, which comprises the following parts: direct current motor, measurement experiment rack, pulling sensor, top test sample and ball hinge down test sample, amplifying circuit, A / D conversion card and computer, wherein, the motor is orderly connected to pulling sensor, top sample phase; the down sample hinge rack is fixed on bottom socket; the said pulling sensor is connected to amplifying circuit, A / D conversion card and computer; electrical signals are amplified into A / D conversion card into computer by use of computer data collection program.

Description

technical field [0001] The invention relates to the technical field of measuring the real contact area and adhesion effect of a contact surface in the field of tribological theoretical research, in particular to a device and a measurement method for measuring the real contact area and adhesion effect of a contact surface. Background technique [0002] When two solid surfaces come into contact, the actual contact occurs only over a very small fraction of the apparent area due to surface roughness. The size and distribution of the actual contact area has a decisive influence on friction and wear. In the study of tribology, the real contact area of ​​the contact surface and the measurement of the adhesion effect have always been concerned by people. The real contact area and surface contact state are the basis for the analysis of friction, wear and lubrication problems, so that the study of tribological mechanism can be further deepened. to explore the microscopic nature. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/00G01N19/04G01B5/26
Inventor 黄平丁凌云
Owner SOUTH CHINA UNIV OF TECH
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