CN101441234A - Self-adapting stabilized contact electric resistance measuring apparatus - Google Patents
Self-adapting stabilized contact electric resistance measuring apparatus Download PDFInfo
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- CN101441234A CN101441234A CNA2008102247959A CN200810224795A CN101441234A CN 101441234 A CN101441234 A CN 101441234A CN A2008102247959 A CNA2008102247959 A CN A2008102247959A CN 200810224795 A CN200810224795 A CN 200810224795A CN 101441234 A CN101441234 A CN 101441234A
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Abstract
A self-adapting stably contacted resistance measurement device comprising an upper conducting substrate and a lower conducting substrate is characterized in that the top of the upper conducting substrate is equipped with a universal-joint spindle. Working surfaces of the upper conducting substrate and the lower conducting substrate are both coated with a soft metal clad which can be fixed on the working surfaces of the upper conducting substrate and the lower conducting substrate by nuts. The device can ensure full contact between the conducting substrates and the end face of a sample and uniform distribution of stable contact resistance and current when passing through the sample and realize accurate measurement. Therefore, the device is applicable to the measurement devices for measuring the resistance and the specific resistance of heterogeneous material.
Description
Technical field
The present invention relates to a kind of resistance of heterogeneous material, determinator of resistivity measured, particularly a kind of electric resistance measuring apparatus of adaptive stabilizing contact.
Background technology
Be used for measuring the device of heterogeneous material resistivity at present, the metallic conduction plate at its two ends is uncontrollable hard contact of direction with the surface of contact of sample.If the flatness of both ends of the surface injustice or end face does not reach requirement during specimen preparation, current-carrying plate then can occur contacts for part or the some contact with the contact condition of sample end face, this not only causes the uncertain of surface of contact contact resistance, simultaneously will cause the bias current of electric current during by example cross section at electric current, and can cause very mistake measurement result for heterogeneous material.Be situation as shown in Figure 1, 2 with the prior-art devices measuring samples.Between left electrically-conductive backing plate 21 and right electrically-conductive backing plate 24, tested sample 22 is housed.Electrically-conductive backing plate is pushed down sample by the pressurization of force application mechanism (not shown), measures.Figure 1 shows that the bigger situation of biend nonparallelism of sample,, make the end face loose contact of electrically-conductive backing plate and sample, make sample interior electrical current distribution lines 23 inhomogeneous owing to be to be rigidly connected.Figure 2 shows that the bigger situation of left and right sides end face roughness of sample 22, because the rigidity contact makes the biend loose contact of electrically-conductive backing plate and sample, makes sample interior electrical current distribution lines 23 inhomogeneous, cause measurement result inaccurate, can not satisfy the requirement of instrument detecting repeatability.In addition, the making accuracy requirement of this sample is very high, and general laboratory is difficult to processing and manufactures.
Summary of the invention
The electric resistance measuring apparatus that the purpose of this invention is to provide a kind of adaptive stabilizing contact is to solve the problem of the above-mentioned measurement loose contact that exists.The present invention can make electrically-conductive backing plate fully contact with the sample end face, and the even distribution when guaranteeing stable contact resistance and electric current by sample reaches accurate measurement.The objective of the invention is to realize by following technical scheme.The present invention is the electric resistance measuring apparatus of a kind of adaptive stabilizing contact, comprises electrically-conductive backing plate, time electrically-conductive backing plate, it is characterized in that: universal-joint spindle is equipped with at the top of electrically-conductive backing plate on described.
On described electrically-conductive backing plate, all be covered with the soft metal clad on the workplace of electrically-conductive backing plate down.
Described soft metal clad be fixed on nut describedly go up electrically-conductive backing plate, down on the workplace of electrically-conductive backing plate.
Described soft metal clad is made of foamed aluminium, copper or multilayer aluminium, copper mesh.
The present invention adopts the above-below direction pressurization to detect, use universal-joint spindle that electrically-conductive backing plate is connected with pressue device, since universal-joint spindle be can three-dimensional rotation joint shaft (or universal coupling etc.), make the connected electrically-conductive backing plate of going up can Three dimensional rotation, electrically-conductive backing plate can 360 ° of directions be done maximum 90 ° inclination on the plane, when electrically-conductive backing plate is pressed to sample surfaces, under the stressed outside effect, the tilt condition on the surface of contact meeting accommodate sample surface of electrically-conductive backing plate, make the initiatively uneven end face of accommodate sample of electrically-conductive backing plate, the contact that guarantees surface of contact is complete, makes electric current pass through entire cross section equably.Owing to adopt the good soft metal of electric conductivity to come the surface of contact of clad metal electrically-conductive backing plate, can overcome uneven that heterogeneous material sample end face causes in process, avoid the situation of a contact; Make contact good, guarantee the even distribution of electric current on xsect.
The soft metal clad can be soft metal net or reticular lamination carbon sheet metal.It can be directly overlayed on the workplace of electrically-conductive backing plate, also available gland nut is fixed on the electrically-conductive backing plate, and assurance clad and electrically-conductive backing plate are fitted fully under impressed pressure.When upper and lower electrically-conductive backing plate was pressed in sample surfaces, soft clad produced distortion under the effect of external force, fully contact with rough surface.Because most of heterogeneous materials are comparatively loose, dust granules comes off easily under the effect of external force, causes clad to pollute; On the other hand, clad can produce plastic yield after using a period of time, causes the contact condition variation, at this moment needs in time to change clad; Adopt gland nut that the soft metal clad is connected with upper and lower substrate, can be convenient for changing.
The invention solves current-carrying plate and the local problem that contacts and not exclusively contact of sample surface of contact in the resistivity measurement process, eliminated, make measuring accuracy improve an order of magnitude owing to the uncertain measuring error that causes of contact resistance; And make the preparation difficulty of processing of sample reduce by 10 times, with general sampling, the equal detection requirement that can satisfy sample of cutting equipment manufactured samples, improved the adaptability of surveying instrument.For example, former sample processing is for the aluminium of the ￠ 50 x 130mm plain sample of charcoal, with hard contact electrically-conductive backing plate, requiring the sample both ends of the surface depth of parallelism is 0.05mm, and the end face flatness is 0.01mm, and the sample of this machining precision need be processed on fine turning lathe or grinding machine; After adopting measurement mechanism of the present invention, the similar detection sample, its accuracy requirement is no more than 0.5mm, when the end face flatness is no more than 0.1mm, just can satisfies the requirement of instrument detecting repeatability for the both ends of the surface depth of parallelism.This sample all can be manufactured in common laboratory.
In sum, the present invention can make electrically-conductive backing plate fully contact with the sample end face, and the even distribution when guaranteeing stable contact resistance and electric current by sample realizes accurately measuring; Reduced requirement on machining accuracy simultaneously to sample.
Description of drawings
Fig. 1,2 structure and operation charts for existing measurement mechanism.
Fig. 3,4 is for the structure of measurement mechanism of the present invention and operation chart.
Fig. 5 is the structural representation that is covered with soft metal clad electrically-conductive backing plate among the present invention.
Fig. 6 is another structural representation that is covered with soft metal clad electrically-conductive backing plate among the present invention.
Code name among the figure
Electrically-conductive backing plate 3 soft metal clads on 1 universal connecting shaft 2
4 samples, 5 sample interior electrical current distribution lines, 6 soft metal clads
Electrically-conductive backing plate on 7 times electrically-conductive backing plate 8 back-up rings 9
10 gland nuts, 11 soft metal clads
21 left sides (fixing) current-carrying plate, 22 samples, 23 sample interior electrical current distribution lines
24 right sides (activity) current-carrying plate
Embodiment
With the resistivity of carbon product measurement mechanism of the present invention is described to measure aluminium.Sample is diameter 50mm, the right cylinder of length 130mm.
Adopt measurement mechanism of the present invention to measure.During operation, upper and lower electrically-conductive backing plate contacts with two end faces of sample, and the resistivity of calculation sample falls in the pressure of measuring two xsects of certain distance behind the conducting electric current.Fig. 3,4 is depicted as the structure and the operation chart of the electric resistance measuring apparatus of a kind of adaptive stabilizing of the present invention contact, and apparatus of the present invention comprise electrically-conductive backing plate 2, time electrically-conductive backing plate 7, and universal-joint spindle 1 is equipped with at the top of electrically-conductive backing plate 2 on described.On described electrically-conductive backing plate 2, all be covered with the clad 3,6 that the soft metal makes on the workplace of electrically-conductive backing plate 7 down.
Figure 3 shows that the bigger situation of upper and lower end face nonparallelism of sample 4,, make sample 4 internal current distributing lines 5 even because the regulating action of universal connecting shaft 1 fits tightly two end faces of upper and lower electrically- conductive backing plate 2,7 and sample 4.
Figure 4 shows that the bigger situation of upper and lower end face roughness of sample 4,, make sample 4 internal current distributing lines 5 even because the regulating action of soft metal clad 3,6 fits tightly soft metal clad and 2 roughened end surface.
Fig. 5 is the structural representation of the last electrically-conductive backing plate 2 among Fig. 3,4, and the universal connecting shaft of fixing with back-up ring 8 (oscillating bearing) 1 is housed in the apex cavity of last electrically-conductive backing plate 2.
Fig. 6 is the synoptic diagram of the last electrically-conductive backing plate 9 of another structure, and the cross section of last electrically-conductive backing plate 9 is a stepped appearance, is covered with soft metal clad 11 on the workplace of last electrically-conductive backing plate 9, is fixed on the electrically-conductive backing plate 9 with gland nut 10.
Following electrically-conductive backing plate 7 is fixed on down the soft metal clad (not shown) on the ladder of electrically-conductive backing plate with gland nut equally.
The soft metal clad 3,6,11 that is adopted adopts the red copper net, also can make of foam copper or foamed aluminium material.
During measuring operation, as Fig. 3,4, sample 4 is between upper and lower current-carrying plate 2,7, and last current-carrying plate 2 is fixed on the force application mechanism by oscillating bearing 1, can do 360 degree rotations around central point.Sample one end is placed on the lower conducting plate 7, fit tightly with lower conducting plate 7 upper surfaces, when force application mechanism when pressing down, the workplace of last electrically-conductive backing plate 2 (lower plane) can fit tightly with sample 4 upper surfaces under the effect of power; To guarantee that measurement accurately.
Claims (4)
1, the electric resistance measuring apparatus of a kind of adaptive stabilizing contact comprises electrically-conductive backing plate, time electrically-conductive backing plate, it is characterized in that: universal-joint spindle is equipped with at the top of electrically-conductive backing plate on described.
2, the electric resistance measuring apparatus of adaptive stabilizing according to claim 1 contact is characterized in that: on described electrically-conductive backing plate, all be covered with the soft metal clad on the workplace of electrically-conductive backing plate down.
3, the electric resistance measuring apparatus of adaptive stabilizing according to claim 2 contact is characterized in that: described soft metal clad be fixed on nut describedly go up electrically-conductive backing plate, down on the workplace of electrically-conductive backing plate.
4, the electric resistance measuring apparatus of adaptive stabilizing contact according to claim 2, it is characterized in that: described soft metal clad is made of foamed aluminium, copper or multilayer aluminum bronze net.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102247959A CN101441234A (en) | 2008-12-26 | 2008-12-26 | Self-adapting stabilized contact electric resistance measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102247959A CN101441234A (en) | 2008-12-26 | 2008-12-26 | Self-adapting stabilized contact electric resistance measuring apparatus |
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| CN101441234A true CN101441234A (en) | 2009-05-27 |
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| CNA2008102247959A Pending CN101441234A (en) | 2008-12-26 | 2008-12-26 | Self-adapting stabilized contact electric resistance measuring apparatus |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105652094A (en) * | 2016-03-01 | 2016-06-08 | 哈尔滨理工大学 | Zinc oxide nano material resistance measurement method and device |
| CN106908676A (en) * | 2017-03-06 | 2017-06-30 | 国家电网公司 | Intelligent substation relay protection condition monitoring and failure diagnosis system body |
| CN108020700A (en) * | 2017-11-28 | 2018-05-11 | 国网上海市电力公司 | An a kind of bleeder mechanism for transient overvoltage monitoring system |
| CN108414837A (en) * | 2018-02-06 | 2018-08-17 | 华南理工大学 | A kind of experimental measurement method of aerial earth wire and preformed armor rods contact port contact resistance |
| JP7446931B2 (en) | 2020-06-23 | 2024-03-11 | 株式会社神戸製鋼所 | Contact resistance measuring device |
-
2008
- 2008-12-26 CN CNA2008102247959A patent/CN101441234A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105652094A (en) * | 2016-03-01 | 2016-06-08 | 哈尔滨理工大学 | Zinc oxide nano material resistance measurement method and device |
| CN106908676A (en) * | 2017-03-06 | 2017-06-30 | 国家电网公司 | Intelligent substation relay protection condition monitoring and failure diagnosis system body |
| CN108020700A (en) * | 2017-11-28 | 2018-05-11 | 国网上海市电力公司 | An a kind of bleeder mechanism for transient overvoltage monitoring system |
| CN108414837A (en) * | 2018-02-06 | 2018-08-17 | 华南理工大学 | A kind of experimental measurement method of aerial earth wire and preformed armor rods contact port contact resistance |
| JP7446931B2 (en) | 2020-06-23 | 2024-03-11 | 株式会社神戸製鋼所 | Contact resistance measuring device |
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Open date: 20090527 |