CN200996929Y - Device for measuring real contact area and sticky effect - Google Patents
Device for measuring real contact area and sticky effect Download PDFInfo
- Publication number
- CN200996929Y CN200996929Y CN 200720047899 CN200720047899U CN200996929Y CN 200996929 Y CN200996929 Y CN 200996929Y CN 200720047899 CN200720047899 CN 200720047899 CN 200720047899 U CN200720047899 U CN 200720047899U CN 200996929 Y CN200996929 Y CN 200996929Y
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- contact area
- sample
- measuring
- force sensor
- real contact
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Abstract
A true contact area and adhesion effect measuring apparatus is provided, which is characterized in: the true contact area and adhesion effect measuring apparatus comprises a measuring test bench bracket, an upper test sample, a lower test sample, a separation drive unit, and a force measuring unit, wherein, the force measuring unit comprises a tensile force sensor and a data acquisition unit; the data acquisition unit comprises a A/D conversion card and a computer; wherein, the separation drive unit is connected to the tensile force sensor and the upper test sample in sequence with a thin rope via fixed pulleys mounted on the measuring test bench bracket; the lower test sample is fixed on the base of the measuring test bench bracket; the tensile force sensor is connected to the A/D conversion card and the computer in sequence.
Description
Technical field
The utility model relates to the field of measuring technique of surface in contact real contact area and sticking effect in the tribology theory research field, especially relates to a kind of real contact area of surface in contact and device of sticking effect measured.
Background technology
When two solid surface contacts, because rough surface, actual contact only occurs on the minimum part of apparent area.The size of real contact area and distribution play decisive influence for rubbing wear.In tribology research, the real contact area of surface in contact and sticking effect problems of measurement are the problems that people paid close attention to always, real contact area and surperficial contact condition are the bases of analyzing rubbing wear and lubrication problem, make the research of tribology mechanism can more in depth explore microscopic nature.
The research to real contact area and sticking effect at present mainly is in theoretical research stage, and most researchs are by setting up surperficial contact model, carry out numerical Analysis then, and then less relatively aspect experimental study, the breakthrough that obtains is very limited.Now, also there are some thinkings and method in the real contact area aspect of directly measuring surface in contact: for example adopt ultrasonic microscope to be equipped with the real contact area of other ancillary test measurement device surface in contact, studies show that the sonomicroscope technology is to measure a kind of feasible method of real contact area, but will be with it as the further research and perfect that await of a kind of quantitative measurment means; Total reflection method also is to measure the conventional means of real contact area in addition, yet little with its contact image that records, the obscurity boundary of contact (area) pattern, and can only be used in the contact of light transmissive material.In addition, also there be not relevant report aspect the sticking effect measurement at present.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, higher, the simple and practical economy of a kind of measuring accuracy is provided, can satisfies the measurement surface in contact real contact area of tribology mechanism experiment research demand and the device of sticking effect, utilize the little direct current motor of uniform rotation to drive the sample lifting, make two contact plane vertical separation, sample by the sensor that is connected to computing machine, measure the load change before and after separating, thereby obtain the influence of real contact area and sticking effect.
A kind of surface in contact real contact area and sticking effect measurement mechanism comprise experiments of measuring platform support, last sample, following sample, separate drive unit and device for measuring force; Described device for measuring force comprises pulling force sensor and data collector, and described data collector comprises analog-to-digital conversion card and computing machine;
Wherein, described separation drive unit by cord, be fixed on experiments of measuring platform support fixed pulley successively with pulling force sensor, go up sample and be connected; Described sample down is fixed on the base of experiments of measuring platform support; Described pulling force sensor is connected successively with analog-to-digital conversion card, computing machine.
Described experiments of measuring platform support is a cantilever support; Drive unit is direct current motor or AC motor, and is installed on the vibration isolator, can reduce the interference that motor oscillating is gathered data; Adopt spherical linkage to be connected between described down sample and the base, sample contacts fully about making; Described electric signal is realized data acquisition by the conversion of analog-to-digital conversion card by the data acquisition program in the computing machine.
The method that said apparatus is used to measure may further comprise the steps:
(1) motor, will be gone up sample and mention by fixed pulley and the pulling force sensor that is fixed on support by the pulling cord;
(2) load before and after the separation produces electric signal by pulling force sensor, the input analog-to-digital conversion card, import computing machine again, utilize data acquisition program in the computing machine to realize the data acquisition of small tension variations, thereby realize trying to achieve the size of real contact area and sticking effect.
Compared with prior art, the beneficial effects of the utility model are:
(1) distinguish main acting force between surface in contact easily, by measuring the onesize metal material contact and the acting force of nonmetallic materials surface in contact, just can differentiate prevailing is atmospheric pressure or clinging power;
(2) by custom-designed aperture that is used to promote on the cord that regulates and the sample and the spherical linkage that is used to support down sample, can guarantee that contact is good between the specimen surface, in lifting process on sample keep level;
(3) by the variation of detachment process pulling force, obtain real contact area and sticking effect, thereby in the existing tribology theory of checking, with real contact area and the theoretical friction theorem rationality of setting up of adhesion.
Description of drawings
Fig. 1 is the utility model measurement mechanism synoptic diagram;
Fig. 2 is the data collector structural representation that connects among Fig. 1.
Embodiment
As shown in Figure 1, 2, the utility model device comprises vibration isolator 1, motor 2, cord 3, fixed pulley 4, support 5, pulling force sensor 6, goes up sample 8, following sample 9, spherical linkage 10 and data collector.Wherein, data collector comprises amplifying circuit 11, analog-to-digital conversion card 12, computing machine 13 and lead 7.
Principle of work is: when last sample contacts well with following specimen surface after, actuating motor 2, under the drive of cord 3, fixed pulley 4 by being fixed on support 5 and pulling force sensor 6 will be gone up sample 8 and at the uniform velocity slowly promote, by the tension variations on the pulling force sensor 6 instant induction cords that are connected to cord, this tension variations value will be transferred to data collector.Following sample 9 is fixed on the base of support, can vertical separation for guaranteeing two specimen surfaces, and spherical hinge 10 has been adopted in the support of following sample.Motor 2 is installed on the vibration isolator 1, eliminates the influence of motor vibration to experimental result.Load before and after separating produces electric signal by pulling force sensor, imports analog-to-digital conversion card 12 through amplifying after, imports computing machine 13 again, utilizes data acquisition program in the computing machine to realize the data acquisition of small tension variations.
During actual measurement, at first adjust the center of gravity of sample 8, guarantee its level, transfer then and make itself and following sample 9 stable contacts (this moment, cord 3 pulling force reached minimum), start direct current motor 2 then and drive upward sample 8 liftings, leave in the process of following sample 9 at last sample 8, bigger variation can take place in value of thrust, these changing values can go out electric signal by pulling force sensor 6 instantaneous transmission, and finish sampling immediately in computing machine 13 by amplifying circuit 11 and analog-to-digital conversion card 12 and data acquisition program.By the tension variations of whole cord in the drawing process that collects, just can calculate real contact area or sticking effect under a kind of material roughness.After one group of measurement is finished, change other a different set of sample again and measure.
Claims (4)
1, a kind of surface in contact real contact area and sticking effect measurement mechanism is characterized in that, comprise experiments of measuring platform support, last sample, following sample, separate drive unit and device for measuring force; Described device for measuring force comprises pulling force sensor and data collector, and described data collector comprises analog-to-digital conversion card and computing machine; Wherein
Described separation drive unit by cord, be fixed on experiments of measuring platform support fixed pulley successively with pulling force sensor, go up sample and be connected; Described sample down is fixed on the base of experiments of measuring platform support; Described pulling force sensor is connected successively with analog-to-digital conversion card, computing machine.
2, surface in contact real contact area according to claim 1 and sticking effect measurement mechanism is characterized in that, described experiments of measuring platform support is a cantilever support.
3, surface in contact real contact area according to claim 1 and sticking effect measurement mechanism is characterized in that, described separation drive unit is direct current motor or AC motor, is installed on the vibration isolator.
4, surface in contact real contact area according to claim 1 and sticking effect measurement mechanism is characterized in that, adopt spherical linkage to be connected between described down sample and the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720047899 CN200996929Y (en) | 2007-01-26 | 2007-01-26 | Device for measuring real contact area and sticky effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720047899 CN200996929Y (en) | 2007-01-26 | 2007-01-26 | Device for measuring real contact area and sticky effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200996929Y true CN200996929Y (en) | 2007-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200720047899 Expired - Lifetime CN200996929Y (en) | 2007-01-26 | 2007-01-26 | Device for measuring real contact area and sticky effect |
Country Status (1)
| Country | Link |
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| CN (1) | CN200996929Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101008606B (en) * | 2007-01-26 | 2010-10-06 | 华南理工大学 | Device for measuring real contact area and viscous effect of contact surface and measuring method thereof |
| CN102175600A (en) * | 2010-12-30 | 2011-09-07 | 东华大学 | Device and method for detecting frictional performance between fabric and skin |
| CN104390542A (en) * | 2014-11-12 | 2015-03-04 | 郑州磨料磨具磨削研究所有限公司 | Limit gauge detecting device and limit gauge detecting method using same |
-
2007
- 2007-01-26 CN CN 200720047899 patent/CN200996929Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101008606B (en) * | 2007-01-26 | 2010-10-06 | 华南理工大学 | Device for measuring real contact area and viscous effect of contact surface and measuring method thereof |
| CN102175600A (en) * | 2010-12-30 | 2011-09-07 | 东华大学 | Device and method for detecting frictional performance between fabric and skin |
| CN104390542A (en) * | 2014-11-12 | 2015-03-04 | 郑州磨料磨具磨削研究所有限公司 | Limit gauge detecting device and limit gauge detecting method using same |
| CN104390542B (en) * | 2014-11-12 | 2017-08-25 | 郑州磨料磨具磨削研究所有限公司 | Difference gauge detection means and the difference gauge detection method using the device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20071226 Effective date of abandoning: 20070126 |