CN201218825Y

CN201218825Y - Contact resistor measuring apparatus

Info

Publication number: CN201218825Y
Application number: CNU2008200594796U
Authority: CN
Inventors: 傅延安; 阎启; 俞宁峰; 苏海波
Original assignee: Baoshan Iron and Steel Co Ltd
Current assignee: Baoshan Iron and Steel Co Ltd; Baosteel Group Corp
Priority date: 2008-06-06
Filing date: 2008-06-06
Publication date: 2009-04-08
Anticipated expiration: 2018-06-06

Abstract

The utility model discloses a measuring device for the contact resistor. The measuring device comprises two electrodes which are provided symmetrically up and down; each electrode comprises the contacted main body and the contact head; the measuring device also comprises two symmetrical opposite clamper; each opposite clamper is the hemispherical tubular structure; middle of one end is vertically provided with a positioning groove with a convex handle; the measuring device is combined and sleeved on the contact heads via the opposite clamper, which are positioned by the convex handle; the two samples are coaxial with the electrode and the electrodes to have the aiming and positioning effects, which ensures the accordance and the reappearance of the measurement; the measuring value has a small fluctuation, which significantly enhances the precision of the measuring result.

Description

The measuring contact resistance device

Technical field

The utility model relates to the measuring technique of contact resistance, more particularly, relates to a kind of measuring contact resistance device, and this test unit can help the location and the centering of sample, avoids measured value fluctuation to occur.

Background technology

See also shown in Figure 1, at present, measuring contact resistance device 10 commonly used comprises symmetrically arranged two electrodes 11 up and down, each electrode 11 comprises body 111 and contact head 112, body 111 is a cylindrical structure, contact head 112 is a frustum of a cone body structure, and the diameter of the larger diameter end of contact head 112 equates with body 111 and is connected with body 111.During measurement, will be stacked with two samples 1 of the equal diameters of the smaller diameter end of contact head 112, and be located between two electrodes 11, by pressing mechanism 11 pairs of samples 1 of two electrodes are pressurizeed again, and then come meter to calculate voltage drop between two samples 1 by four-wire method or its method, calculate the contact resistance of 1 on two samples at last.In order to guarantee the degree of accuracy of measurement data, and the consistance of each measuring condition, so in measuring process, must guarantee between two electrodes 11, absolute centering between two samples 1 and between sample 1 and the electrode 11, because two electrodes 11 all are connected with pressing mechanism, can guarantee centering all the time, and it is manually that sample 1 is stacked and when being located between the electrode 11, there is no still what effective centering and location measure, make and to guarantee centering preferably between electrode 11 and the sample 1 and between sample 1 and the sample 1, thereby the consistance when causing each the measurement is relatively poor, cause the measured value fluctuation of contact resistance bigger, and poor reproducibility finally causes measurement result bigger deviation to occur, and degree of accuracy reduces greatly.

The utility model content

At can't centering between the above-mentioned electrode that exists in the prior art, the measuring condition consistance can't guarantee and big, the relatively poor shortcoming of reappearance of measured value fluctuation, the purpose of this utility model provides a kind of measuring contact resistance device, this measurement mechanism can help between the sample and the centering between sample and the electrode, guarantees consistance and the reappearance measured.

For achieving the above object, the utility model adopts following technical scheme:

This measuring contact resistance device comprises two electrodes, two electrodes are symmetrically set in the upper and lower of mutually stacked circle with two samples of protruding handle, each electrode comprises body and the contact head that is connected, this measurement mechanism also comprises the centering anchor clamps of two symmetries, each centering anchor clamps is the semicircle tubular structure, vertically has a locating slot that supplies the protruding handle of sample to stretch out in the middle of the one end; This two centerings anchor clamps merging is sheathed on sample and the contact head.

Described body is designed to right cylinder and two parts of circular cone stage body, and the larger diameter end of circular cone stage body is connected with right cylinder one end; Described contact head is a cylindrical structure, and its diameter is less than the smaller diameter end of circular cone stage body, and links to each other with the smaller diameter end of circular cone stage body is coaxial.

Described each centering anchor clamps all are designed to the two sections that are connected, and one section internal diameter and contact head diameter are suitable, and an end of an one end and a circular cone stage body offsets, and its height equates with the contact head height; Another section internal diameter and specimen finish are suitable, and an end of one end and another circular cone stage body offsets.

The protruding handle width of the locating slot width of described centering anchor clamps and described sample is suitable.

In technique scheme, measuring contact resistance device of the present utility model comprises two symmetrically arranged electrodes up and down, each electrode comprises body and the contact head that is connected, this measurement mechanism also comprises the centering anchor clamps of two symmetries, each centering anchor clamps is the semicircle tubular structure, vertically have a locating slot that supplies the protruding handle of sample to stretch out in the middle of the one end, this measurement mechanism is sheathed on sample and the contact head by the merging of two centering anchor clamps, and by the location of locating slot to protruding handle, make between two samples and sample and electrode between coaxial, thereby effectively play in and positioning action, consistance and the reappearance measured have been guaranteed, and the measured value fluctuation is less, has improved the degree of accuracy of measurement result greatly.

Description of drawings

Fig. 1 is the structure and the user mode use figure of the measuring contact resistance device of prior art;

Fig. 2 is the STRUCTURE DECOMPOSITION figure of measuring contact resistance device of the present utility model;

Fig. 3 is the structural representation of the sample that is suitable for of measurement mechanism of the present utility model;

Fig. 4 is the vertical view after two positioning fixtures of measurement mechanism of the present utility model merge;

Fig. 5 is the user mode cut-open view of measurement mechanism of the present utility model;

Fig. 6 is the broken line graph of the contact resistance value of the electrogalvanizing material measured of measurement mechanism of the present utility model.

Embodiment

Further specify the technical solution of the utility model below in conjunction with drawings and Examples.

See also shown in Figure 2, measuring contact resistance device 20 of the present utility model comprises two electrodes 21, two electrodes 21 be symmetrically set in two mutually stacked identical samples 1 ' upper and lower, need to prove at this, match with measurement mechanism 20 of the present utility model the sample 1 that uses ' structure as shown in Figure 3, this sample 1 ' for circular and with similar " racket shape " structure of the protruding handle 1 ' a of a rectangle, this protruding handle 1 ' a not only is used for centering location, and can be convenient for measuring lead movable clip insert and put connection.Each electrode 21 comprises body 211 and the contact head 212 that is connected, and wherein, body 211 is designed to right cylinder and two parts of circular cone stage body, and the larger diameter end of circular cone stage body equates with cylinder diameter, and is connected with right cylinder one end; Contact head 212 is a cylindrical structure, its diameter is less than the smaller diameter end of circular cone stage body, and also be slightly less than sample 1 ' diameter (sample 1 ' slightly larger in diameter be when measuring in contact head 212, the current edge effect is to the influence of measurement result), an end of this contact head 212 is connected with the smaller diameter end of circular cone stage body is coaxial.Please again in conjunction with Fig. 2, Fig. 4 and shown in Figure 5, this measurement mechanism 20 also comprises the centering anchor clamps 22 of two symmetries, each centering anchor clamps 22 is the semicircle tubular structure, vertically have one in the middle of the one end and supply the locating slot 221 that sample 1 ' protruding handle 1 ' a stretches out, the width of the width of this locating slot 221 and sample 1 ' protruding handle 1 ' a is suitable, is used for protruding handle 1 ' a and stretches out and locate.And each centering anchor clamps 22 all is designed to the two sections that are connected, in Fig. 2, the hypomere internal diameter and contact head 212 diameters of centering anchor clamps 22 are suitable, and its height highly equates with contact head 212, and the epimere internal diameter of centering anchor clamps 22 and sample 1 ' diameter are suitable, and its height equates with contact head 212 and two samples 1 ' height sum, when closing, two centering anchor clamps 22 are a cannula-like structure (see figure 4), can be sheathed on sample 1 ' and contact head 212 on, and the inwall of centering anchor clamps 22 is respectively with corresponding contact head 212 and sample 1 ' offset and clamp.In addition, these centering anchor clamps 22 can adopt chromium-copper or chrome zirconium copper alloy material, because the high-temperature behavior of this material is outstanding, and intensity is big, hardness is high, even if under higher working temperature, also can keep good dimensional accuracy.

During use, with two samples 1 ' stacked and be located between the contact head 212 of two electrodes 21, adopt then two centering anchor clamps 22 sample 1 ' and down contact head 212 both sides merge, and make two samples 1 ' protruding handle 1 ' a from the locating slot 221 of centering anchor clamps 22, stretch out respectively, when two centering anchor clamps 22 merge, also just in time clamp and be enclosed within two samples 1 ' and contact head 212 on, and the two ends of centering anchor clamps 22 are respectively with last, the end of the circular cone stage body of two electrodes 21 offsets down, thereby guaranteed electrode 21, sample 1 ' coaxial, effectively guaranteed sample 1 ' between and sample 1 ' and electrode 21 between to the neutralization location, two electrodes 21 by pressing mechanism to sample 1 ' when pressurizeing, electrode 21 and sample 1 ' all remain centering, centering anchor clamps 22 can be separated and take off after the pressurization, connect then and measure lead, two samples, 1 ' different parts is measured,, drawn the contact resistance of this sample 1 ' material at last through a series of correlation computations.

See also shown in Figure 6, a1 and a2 are for adopting measurement mechanism 20 of the present utility model respectively to the contact resistance value of two kinds of electrogalvanizing materials samples 1 ' measure, from Fig. 6, can significantly find out, the curve fluctuation that a1 and a2 are linked to be is less, strong proof the centering of this measurement mechanism 20 preferable, thereby guaranteed consistance and the reappearance measured for several times, measurement result is comparatively true.

Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model variation, the modification of the above embodiment.

Claims

1. measuring contact resistance device, this measurement mechanism comprises two electrodes, and two electrodes are symmetrically set in the upper and lower of mutually stacked circle with two samples of protruding handle, and each electrode comprises body and the contact head that is connected, and it is characterized in that:

This measurement mechanism also comprises the centering anchor clamps of two symmetries, and each centering anchor clamps is the semicircle tubular structure, vertically has a locating slot that supplies the protruding handle of sample to stretch out in the middle of the one end; This two centerings anchor clamps merging is sheathed on sample and the contact head.

2. measuring contact resistance device as claimed in claim 1 is characterized in that:

Described body is designed to right cylinder and two parts of circular cone stage body, and the larger diameter end of circular cone stage body is connected with right cylinder one end;

Described contact head is a cylindrical structure, and its diameter is less than the smaller diameter end of circular cone stage body, and links to each other with the smaller diameter end of circular cone stage body is coaxial.

3. measuring contact resistance device as claimed in claim 2 is characterized in that:

4. measuring contact resistance device as claimed in claim 1 is characterized in that: