CN103675455B - A kind of four probe resistance test devices - Google Patents
A kind of four probe resistance test devices Download PDFInfo
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- CN103675455B CN103675455B CN201310533074.7A CN201310533074A CN103675455B CN 103675455 B CN103675455 B CN 103675455B CN 201310533074 A CN201310533074 A CN 201310533074A CN 103675455 B CN103675455 B CN 103675455B
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Abstract
The invention discloses a kind of four probe resistance test devices, this four probe resistance test device includes survey resistance probe assembly and the sample stage assembly being movably connected by socket folder, survey and on resistance probe assembly, be provided with survey resistance probe, sample stage and temperature probe it is provided with on sample stage assembly, surveying resistance probe and be tightly against the upper surface of sample stage under the gmatjpdumamics effect that socket presss from both sides, temperature probe is to greatest extent near sample stage edge.The four probe resistance test devices of the present invention are contact test to the test of resistance, avoid mode bonding with silver slurry in traditional four probe resistance method of testings, on the one hand, testing sample will not be polluted, make testing sample to be continuing with or carry out second test；On the other hand, it is to avoid silver-colored slurry bonding four probe locations caused can not accurately control, certainty of measurement is improved；Meanwhile, the temperature measurement result of the four probe resistance test devices of the present invention can be with the real time temperature of accurate response pattern to be measured.
Description
Technical field
The invention belongs to Material Testing Technology field, be specifically related to a kind of four probe resistance test devices.
Background technology
Accurately, the resistance value testing material to vary with temperature in large temperature range easily and fast and intelligently and to change is
One difficult point, difficulty is:
1), accurately test the resistance of material, preferably with standard four probe geometries, at high temperature do the material requirements of four probes
The highest, the most high temperature resistant but also resistance to oxidation；
2), to test in the alundum tube in internal diameter only has the tube furnace of about 35mm, narrow space, to test device
Manufacture and design and cause difficulty；
3), the thermometer of tube furnace self can not accurately reflect the temperature of sample, it is necessary to provides one and can accurately reflect sample temperature
Temperature measuring equipment.
When using four probe test alternating temperature resistance, general way is by four high temperature resistant, oxidation resistant metal silk is bonding by silver slurry
On sample, and then carry out resistance measurement.The deficiency of this method is: on the one hand, and under high temperature, conductive silver paste easily aoxidizes,
Cause connecing probe and touch bad and some interface problems with sample and silver slurry is easy under the high temperature conditions and sample phase counterdiffusion, pollution sample
Product, it is impossible to second test；On the other hand, the mode of silver slurry welding determines the distance between four probes and can not be distribution accurately controlled,
And often one sample of survey will weld, measurement error increases and test complexity, and therefore, it is little that the method at high temperature tests effect
Good.
In current method of testing, the side that a thermocouple is generally placed in testing sample carries out the measurement of temperature to be tested,
Or the Temperature numerical of tube furnace is directly designated as the temperature value of testing sample, and these methods all can not reach sample to be tested temperature
Accurately measure.This is owing to the location comparison of thermocouple is random, and the K-type thermocouple that the temperature sensor of tube furnace is typically,
The precision of K-type thermocouple own is not high enough, and the probe adding thermocouple is positioned at the outside of alundum tube, and provides thermal source to tube furnace
Four siliconits also be located at outside alundum tube, the temperature measured is the external temperature of alundum tube, and alundum tube itself has thermal insulation
Characteristic, so being positioned at the temperature that at the alundum tube inside center of sealing, the thermometer of the actual temperature of sample and tube furnace self shows
Not consistent.The when of intensification, sample actual temperature is less than displays temperature；The when of cooling, higher than displays temperature, actual feelings
In condition, in temperature-rise period, the sample temperature at alundum tube inside center is lower by about 30 than tube furnace own temperature, if fast lifting
Temperature, internal and external temperature difference is bigger.
Summary of the invention
It is an object of the invention to overcome the problems referred to above of the prior art, it is provided that one does not results in testing sample and pollutes and energy
Quickly, four probe resistance test devices of testing sample alternating temperature resistance and real time temperature are accurately measured.
For solve above-mentioned technical problem, the present invention by the following technical solutions:
A kind of four probe resistances test devices, including socket folder, survey resistance probe assembly and sample stage assembly, survey resistance probe assembly and
Sample stage assembly is movably connected by socket folder；
Survey resistance probe assembly and include the first horizontal earthenware, vertical earthenware, the first securing member and the first nickel wire, vertical earthenware
Be fixedly linked by one end of the first nickel wire, the first securing member and the first horizontal earthenware, the other end of the first horizontal earthenware with
The clamping fixed connection of socket；Described vertical ceramic tube inside is provided with four through holes being located on the same line, in each through hole all
Being provided with one and survey resistance probe, surveying resistance probe is the platinoiridita silk that one end polishing is converted into right angle for tip-like, the other end, is polished into pin
The mouth of pipe is exposed through set through hole on vertical earthenware and needle point in pointed one end；Described first horizontal ceramic tube inside is provided with
The through hole that four sizes are identical, is provided with a platinoiridita silk in each through hole, one end of every platinoiridita silk is converted into surveying resistance probe
The one end at right angle is fixedly linked, and the other end exposes the first horizontal earthenware mouth of pipe；
Sample stage assembly includes the second horizontal earthenware, sample stage, the second securing member and the second nickel wire, and described sample stage is arranged on
On second securing member, the second securing member is fixedly linked by one end of the horizontal earthenware of the second nickel wire and second, the second level pottery
The other end of pipe is fixedly linked with socket folder；Two through holes it are provided with, wherein in second horizontal earthenware of described sample stage assembly
It is provided with a Pt-Rh wire in one through hole, in another through hole, is provided with a platinum filament, described Pt-Rh wire and platinum filament
One end together and form a spherical shape pad by arc welding, this pad as temperature probe, described temperature probe
Near sample edge of table, the other end of described Pt-Rh wire and platinum filament is exposed independent from the pipe of the horizontal earthenware of sample stage assembly second
Mouthful.
The center of described vertical earthenware is equal with the distance at socket folder center with the distance at socket folder center and sample stage center,
The lower resistance probe of surveying of the effect of socket folder gmatjpdumamics is against on the upper surface of sample stage.
Further, described survey hinders the platinoiridita silk of setting and the survey of setting in vertical earthenware in the horizontal earthenware of probe assembly first
Resistance probe is by arc welding together.
Further, the described platinoiridita silk surveying the resistance probe assembly first horizontal earthenware mouth of pipe is all welded with one section of nickel wire or platinum filament.
Further, the Pt-Rh wire of the described sample stage assembly second horizontal earthenware mouth of pipe and platinum filament are respectively welded one section
Nickel wire or platinum filament.
Further, described socket folder include spring, be fixed on the holding piece of spring both sides, the steel pipe being fixed on holding piece and
The screw being arranged on steel pipe, the internal diameter of described steel pipe be more than the first horizontal earthenware and the external diameter of the second horizontal earthenware, first
The fixing of position is realized in horizontal earthenware and the second horizontal earthenware are inserted in described steel pipe and by screw.
Further, a kind of resistance testing devices based on described four probe resistance test devices, including four probe resistance test dresses
Put, resistance instrument, thermometer, tube furnace, gas cylinder, air exhauster, inlet flange and exhaust flange, wherein, described four probes electricity
Resistance test device is sealed in the alundum tube of tube furnace and sample stage is placed exactly in the center of alundum tube, one end of alundum tube pass through into
Gas flange is fixing with gas cylinder to be connected, and the other end is fixedly linked with air exhauster by exhaust flange, is welded on four probe resistance test dresses
Put the nickel wire or platinum filament surveyed in the resistance horizontal earthenware of probe assembly first on platinoiridita silk through exhaust flange by surveys resistance probe and resistance instrument
It is connected, is welded on the nickel wire on Pt-Rh wire and platinum filament in four probe resistances test device sample stage assembly the second horizontal earthenwares
Or temperature probe is connected with thermometer by platinum filament through exhaust flange.
Further, described air exhauster is the air exhauster being provided with exhaust gas processing device.
Further, one end of the described four probe resistance test horizontal earthenwares of device first and the second horizontal earthenware is equipped with close
Envelope connects pipe fitting, and the one end being tightly connected pipe fitting and the first horizontal earthenware and the connection of the second horizontal earthenware is hollow cylinder, the
One horizontal earthenware and the second horizontal earthenware are inserted in described hollow cylinder；The other end being tightly connected pipe fitting is bolt and and spiral shell
The nut that bolt coordinates；Bolt is through the through hole arranged on exhaust flange and to be tightly connected pipe fitting by nut realization close with exhaust flange
Envelope connects；The inside being tightly connected pipe fitting being connected with the survey resistance horizontal earthenware of probe assembly first is provided with four and hinders probe groups with surveying
In the horizontal earthenware of part first, set lead to the hole site is consistent, and equal-sized through hole is welded on platinoiridita silk in the first horizontal earthenware
On nickel wire or platinum filament through described through hole, and then be connected with resistance instrument；It is close that earthenware horizontal with sample stage assembly second is connected
In the inside of envelope connection pipe fitting is provided with two earthenwares horizontal with sample stage assembly second, set lead to the hole site is consistent, equal-sized
Through hole, the nickel wire being welded in the second horizontal earthenware on Pt-Rh wire and platinum filament or platinum filament are through described through hole and thermometer phase
Even.
Further, the material being tightly connected pipe fitting described in is politef or polyimides.
Compared with prior art, the invention has the beneficial effects as follows:
(1) the four probe resistances test devices of the present invention are contact test to the test of resistance, it is to avoid traditional four probe resistances
By the silver bonding mode of slurry in method of testing, on the one hand, testing sample will not be polluted, make testing sample to be continuing with or
Carry out second test；On the other hand, it is to avoid silver-colored slurry bonding four probe locations caused can not accurately control, certainty of measurement is improved；
Meanwhile, measuring temperature and no longer limited by the silver-colored oxidizing temperature starched, test temperature can reach the fusing point 1680 DEG C of platinum filament in theory.
(2) the four probe resistance test devices of the present invention use socket to press from both sides, and realize surveying resistance spy under the effect of socket folder gmatjpdumamics
Pin and the close contact of sample, structure is ingenious and reliable；
(3) the four probe resistance test devices of the present invention are provided with temperature probe at sample stage assembly, and this temperature probe can be maximum
The close sample sample to be tested of limit, can accurately measure the real time temperature of pattern to be measured；
(4) four probe resistance test devices are sealed in the alundum tube of tube furnace by the resistance testing device of the present invention, it is achieved that survey
The sealing of amount environment, it is simple to measure under the conditions of sample to be tested alternating temperature resistance under particular atmosphere and constant temperature with atmosphere kind, flow
The resistance changed with concentration change；
(5) resistance testing device of the present invention is configured with hot tail gas processing means, in that context it may be convenient to testing to be tested is having poison
The resistance changed with sample to be tested atmosphere kind, flow and concentration change under the conditions of alternating temperature resistance under atmosphere and constant temperature；
(6), when the resistance testing device using the present invention measures sample to be tested resistance, sample to be tested can be recorded at certain from resistance instrument
Plant the resistor time data under particular atmosphere, from thermometer, record sample to be tested temperature-time under certain particular atmosphere
Data, and then obtain sample to be tested under the resistance temperature data of sample to be tested under this particular atmosphere, i.e. this particular atmosphere
The attribute that resistance varies with temperature, such standardized test has very important Practical significance.
Accompanying drawing explanation
Fig. 1 is the structural representation of the four probe resistance test devices of the present invention；
Fig. 2 is the structural representation of the four probe resistance test vertical earthenwares of device of the present invention；
Fig. 3 is that the four probe resistance test devices of the present invention survey the structural representation hindering the horizontal earthenware of probe assembly first；
Fig. 4 is the structural representation of the four probe resistance test device socket folders of the present invention；
Fig. 5 is the structural representation of the four probe resistance test device sample stage assembly second horizontal earthenwares of the present invention；
Fig. 6 is the structural representation of the resistance testing device of the present invention；
Fig. 7 is the structural representation that the resistance testing device of the present invention is tightly connected pipe fitting；
Fig. 8 is the structural representation of the resistance testing device exhaust flange of the present invention.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, to this
Bright it is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to
Limit the present invention.
As it is shown in figure 1, four probe resistance test devices in the present embodiment include socket folder 1, survey resistance probe assembly 2 and sample
Platform assembly 3, is surveyed resistance probe assembly 2 and sample stage assembly 3 and is movably connected by socket folder 1；
Survey resistance probe assembly 2 and include the first horizontal earthenware 21, vertical earthenware the 22, first securing member 23 and the first nickel wire 24,
Vertically earthenware 22 is fixedly linked by one end of first nickel wire the 24, first securing member 23 with the first horizontal earthenware 21, the
The other end of one horizontal earthenware 21 is fixing with socket folder 1 to be connected；As in figure 2 it is shown, as standard four probe tip distance,
Vertically earthenware 22 is internally provided with four hole hearts away from preferably 1mm and the through hole that is located on the same line, in each through hole
Being provided with survey resistance probe 25, surveying resistance probe 25 for one end polishing is the platinoiridita silk that tip-like, other end needle point are converted into right angle,
The mouth of pipe is exposed through set through hole on vertical earthenware 22 and needle point in the one end being polished into tip-like；As it is shown on figure 3, first
Horizontal earthenware 21 is internal is provided with four identical through holes of size, is provided with a platinoiridita silk, every platinoiridita silk in each through hole
One end with survey resistance probe 25 and be converted into the one end at right angle and be fixedly linked, the other end exposes the first horizontal earthenware mouth of pipe and its upper welding
There are one section of nickel wire or platinum filament 26, are conveniently connected with resistance instrument；
Sample stage assembly 3 includes the second horizontal earthenware 31, sample stage the 32, second securing member 33 and the second nickel wire 34, sample
Platform 32 is arranged on the second securing member 33, and the second securing member 33 is by second nickel wire 34 and one end of the second horizontal earthenware 31
Being fixedly linked, the other end of the second horizontal earthenware 31 is fixedly linked with socket folder 1；In order to obtain sample to be tested resistance with temperature
Variation relation, and realize the accurate measurement of sample to be tested real time temperature, as it is shown in figure 5, the sample stage assembly in the present embodiment
It is provided with two through holes in the second horizontal earthenware 31 of 3, in two through holes, is respectively equipped with Pt-Rh wire and platinum filament, described platinum
One end of rhodium alloy wire and platinum filament is by together with arc welding and form a spherical shape pad, and this pad is as temperature probe
35, temperature probe 35 is exposed independent from sample stage assembly the second level near the other end of sample edge of table, Pt-Rh wire and platinum filament
The mouth of pipe of earthenware and its on be respectively welded one section of nickel wire or platinum filament 36, convenient be connected with thermometer.
Vertically the center of earthenware 22 and socket press from both sides the distance at 1 center and the center of sample stage 32 presss from both sides the distance at 1 center with socket
Equal, under socket presss from both sides the effect of 1 gmatjpdumamics, survey resistance probe 25 be against on the upper surface of sample stage 32, when loading onto sample to be tested
Time, survey resistance probe 25 and be the most only against on the upper surface of sample to be tested.
In order to ensure quality of connection and service life, arrange in the present embodiment is surveyed the first horizontal earthenware 21 of resistance probe assembly 2
Platinoiridita silk and vertical earthenware 22 in the platinoiridita silk that arranges, i.e. survey resistance probe 25 and preferentially select the mode of arc-welding to weld together.
In order to ensure to survey resistance probe assembly 2 and sample stage assembly 3 good fit, improve the accuracy of measurement result, such as Fig. 4
Shown in, socket in the present embodiment folder 1 includes spring 11, is fixed on the holding piece 12 of spring 11 both sides, is fixed on holding piece
Steel pipe 13 on 12 and the screw 14 being arranged on steel pipe 13, the internal diameter of steel pipe 13 is more than surveying resistance probe assembly 2 and sample stage
The external diameter of first horizontal earthenware the 21, second horizontal earthenware 31 of assembly 3, surveys resistance probe assembly 2 and sample stage assembly 3
First horizontal earthenware the 21, second horizontal earthenware 31 be inserted in steel pipe 13 respectively in and realize consolidating of position by screw 14
Fixed.
A kind of resistance testing device based on four probe resistance test devices in the present embodiment, as shown in Figure 6, including four probes
Resistance testing device 1 ＇, resistance instrument 2 ＇, thermometer 3 ＇, tube furnace 4 ＇, gas cylinder 5 ＇, air exhauster 6 ＇, inlet flange 7 ＇ and
Exhaust flange 8 ＇, wherein, four probe resistance test device 1 ＇ are sealed in alundum tube 41 ＇ of tube furnace 4 ＇ and sample stage 32
Being placed exactly in the center at the center of alundum tube 41 ＇, i.e. thermal source, inlet flange 7 ＇ and gas cylinder are passed through in one end of alundum tube 41 ＇
5 ＇ are fixing to be connected, and the other end is fixedly linked with air exhauster 6 ＇ by exhaust flange 8 ＇, is welded on four probe resistance test devices
In the 1 ＇ survey resistance horizontal earthenware 21 of probe assembly 2 first, the nickel wire on platinoiridita silk or platinum filament 26 are through leading on exhaust flange 8 ＇
Survey resistance probe 25 is connected by hole (exhaust flange 8 ＇ structure is as shown in Figure 8) with resistance instrument 2 ＇, is welded on four probe resistances and surveys
In the horizontal earthenware 31 of electricity testing device 1 ＇ sample stage assembly 3 second, the nickel wire on Pt-Rh wire and platinum filament or platinum filament 36 are through row
Temperature probe 35 is connected by the through hole on gas flange 8 ＇ with thermometer 3 ＇.
When using above-mentioned resistance testing device to measure sample to be tested resistance, sample to be tested can be recorded from resistance instrument 2 ＇ special at certain
Determine the resistor time data under atmosphere, from thermometer 3 ＇, record sample to be tested temperature-time under certain particular atmosphere
Data, and then obtain sample to be tested under the resistance temperature data of sample to be tested under this particular atmosphere, i.e. this particular atmosphere
The attribute that resistance varies with temperature, this attribute is the physical attribute of sample to be tested, can be used in other application of this sample to be tested
Occasion.Such standardized test has very important Practical significance.
Above-mentioned resistance testing device can be tested under certain particular atmosphere, such as oxygen, nitrogen, carbon dioxide etc., sample to be tested
Alternating temperature resistance, as described above；Additionally, under the conditions of this resistance testing device can also test constant temperature, the resistance of sample to be tested is with gas
Atmosphere kind, flow and concentration change and the relation that changes, it is also possible to from the variation relation recorded, atmosphere kind infer to be tested
The kind of sample, being judged the kind of atmosphere by the kind of sample to be tested, the research for gas sensor provides a kind of reliable and is suitable for
Research means.
For the ease of measuring the sample to be tested under toxic gas atmosphere, air exhauster 6 ＇ of above-mentioned resistance testing device is for being provided with tail
The air exhauster of Flash Gas Compression Skid System.
Measure the resistance of sample to be tested under particular atmosphere, in the case of the most poisonous atmosphere, prevent gas leakage from seeming abnormal heavy
, therefore, above-mentioned four probe resistance test device 1 ＇ are sealed in alundum tube 41 ＇ of tube furnace 4 ＇, the mode of sealing
Have multiple, provide the sealing means that a kind of comparative structure is simple, convenient and practical here, specific as follows: four probe resistance test dresses
The one end of first horizontal earthenware the 21, the second horizontal earthenware 31 surveying resistance probe assembly 2 and sample stage assembly 3 putting 1 ＇ is equal
It is provided with and is tightly connected pipe fitting 27,37, be tightly connected pipe fitting 27,37 and first horizontal earthenware the 21, second horizontal earthenware 31
The one end connected is hollow cylinder 271,371, the other end be bolt 272,372 and the nut 273 coordinated with bolt 272,372,
373, as shown in Figure 7；Bolt 272,372 passes the through hole arranged on exhaust flange 8 ＇ and passes through nut 273,373 in fact
Now being tightly connected pipe fitting 27,37 to be tightly connected with exhaust flange 8 ＇, the structure of exhaust flange 8 ＇ is as shown in Figure 8；The company of sealing
The inside of jointed tubular workpieces 27 be provided with four with survey the resistance horizontal earthenware 21 of probe assembly 2 first in set lead to the hole site consistent, size
Equal through hole, the nickel wire being welded in the first horizontal earthenware 21 on platinoiridita silk or platinum filament 26 are through described through hole, Jin Eryu
Resistance instrument 21 ＇ is connected；Be tightly connected the inside of pipe fitting 37 be provided with two with institute in the horizontal earthenware 31 of sample stage assembly 3 second
If lead to the hole site through hole consistent, equal-sized, it is welded on the nickel wire on Pt-Rh wire and platinum filament in the second horizontal earthenware 31
Or platinum filament 36 is connected through described through hole with thermometer 3 ＇.
Politef be a kind of generally acknowledged high temperature resistant, pliability good, has good seal, and is prone to the material of processing, because of
This, the material being tightly connected pipe fitting 27,37 in the present embodiment is both preferably politef, surveys to improve resistance further
The heat-resisting quantity of electricity testing device, the material being tightly connected pipe fitting 27,37 can also select polyimides.
Those of ordinary skill in the art is it will be appreciated that embodiment described here is to aid in the former of the reader understanding present invention
Reason, it should be understood that protection scope of the present invention is not limited to such special statement and embodiment.The ordinary skill of this area
Personnel can according to these technology disclosed by the invention enlightenment make various other various concrete deformation without departing from essence of the present invention and
Combination, these deformation and combination are the most within the scope of the present invention.
Claims (6)
1. a probe resistance test device, it is characterised in that: include socket folder, survey resistance probe assembly and sample stage group
Part, is surveyed resistance probe assembly and sample stage assembly and is movably connected by socket folder；
Survey resistance probe assembly and include the first horizontal earthenware, vertical earthenware, the first securing member and the first nickel wire, vertically pottery
Pipe is fixedly linked by one end of the first nickel wire, the first securing member and the first horizontal earthenware, another of the first horizontal earthenware
Hold fixed be connected clamping with socket；Described vertical ceramic tube inside is provided with four through holes being located on the same line, Mei Getong
Being provided with one in hole and survey resistance probe, surveying resistance probe is the platinoiridita silk that one end polishing is converted into right angle for tip-like, the other end,
The vertical earthenware mouth of pipe is exposed through set through hole on vertical earthenware and needle point in the one end being polished into tip-like；Described
One horizontal ceramic tube inside is provided with four identical through holes of size, is provided with a platinoiridita silk, every platinoiridita in each through hole
One end that one end of silk is converted into right angle with survey resistance probe is fixedly linked, and the other end exposes the first horizontal earthenware mouth of pipe；
Sample stage assembly includes the second horizontal earthenware, sample stage, the second securing member and the second nickel wire, and described sample stage is arranged
On the second securing member, the second securing member is fixedly linked by one end of the horizontal earthenware of the second nickel wire and second, the second level
The other end of earthenware is fixedly linked with socket folder；It is provided with two in second horizontal earthenware of described sample stage assembly to lead to
Hole, is provided with a Pt-Rh wire in one of them through hole, be provided with a platinum filament in another through hole, and described platinum rhodium closes
One end of spun gold and platinum filament by together with arc welding and form a spherical shape pad, this pad as temperature probe,
Described temperature probe is exposed independent from sample stage assembly second near sample edge of table, the other end of described Pt-Rh wire and platinum filament
The mouth of pipe of horizontal earthenware；
The center of described vertical earthenware is equal with the distance at socket folder center with the distance at socket folder center and sample stage center,
Under the effect of socket folder gmatjpdumamics, survey resistance probe be against on the upper surface of sample stage.
Four probe resistance test devices the most according to claim 1, it is characterised in that: described survey resistance probe assembly is vertical
The hole heart in four holes set by ceramic tube inside is away from for 1mm.
Four probe resistances test devices the most according to claim 1, it is characterised in that: described survey the of resistance probe assembly
Together with the platinoiridita silk arranged in one horizontal earthenware passes through arc welding with the survey resistance probe arranged in vertical earthenware.
Four probe resistance test devices the most according to claim 1 and 2, it is characterised in that: described survey hinders probe assembly
The first horizontal earthenware mouth of pipe platinoiridita silk on be all welded with one section of nickel wire or platinum filament.
Four probe resistance test devices the most according to claim 1, it is characterised in that: described sample stage assembly the second water
One section of nickel wire or platinum filament it is respectively welded on the Pt-Rh wire of the planar ceramic tube mouth of pipe and platinum filament.
The most according to claim 1 four probe resistances test devices, it is characterised in that: described socket folder include spring,
It is fixed on the holding piece of spring both sides, the steel pipe being fixed on holding piece and the screw being arranged on steel pipe, described steel pipe interior
Footpath is more than the first horizontal earthenware and the external diameter of the second horizontal earthenware, and the first horizontal earthenware and the second horizontal earthenware are inserted in
The fixing of position is realized in described steel pipe and by screw.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310533074.7A CN103675455B (en) | 2013-10-31 | 2013-10-31 | A kind of four probe resistance test devices |
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| CN201310533074.7A CN103675455B (en) | 2013-10-31 | 2013-10-31 | A kind of four probe resistance test devices |
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| CN103675455B true CN103675455B (en) | 2016-08-17 |
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| CN106041343B (en) * | 2016-07-02 | 2018-03-30 | 北京工业大学 | A kind of method for being used to monitor the change of solder bonding metal connection resistance on-line |
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| CN85201272U (en) * | 1985-04-22 | 1986-02-19 | 广州半导体材料研究所 | Four probing pin probe |
| DE29808353U1 (en) * | 1998-05-08 | 1998-09-17 | ORPHEUS Geophysik Gesellschaft für Baugrund- und Umweltanalytik mbH, 65830 Kriftel | Test device for verifying the correct installation of lock profiles between two sealing sheets made of electrically insulating material |
| CN201724962U (en) * | 2010-06-18 | 2011-01-26 | 常州亿晶光电科技有限公司 | Probe positioning structure of four-point probe test instrument |
| CN202216981U (en) * | 2011-09-08 | 2012-05-09 | 昊诚光电（太仓）有限公司 | Dark box for four-probe test instrument |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009222673A (en) * | 2008-03-18 | 2009-10-01 | Panasonic Corp | Powder physical property measurement method and powder physical property measurement device |
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2013
- 2013-10-31 CN CN201310533074.7A patent/CN103675455B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85201272U (en) * | 1985-04-22 | 1986-02-19 | 广州半导体材料研究所 | Four probing pin probe |
| DE29808353U1 (en) * | 1998-05-08 | 1998-09-17 | ORPHEUS Geophysik Gesellschaft für Baugrund- und Umweltanalytik mbH, 65830 Kriftel | Test device for verifying the correct installation of lock profiles between two sealing sheets made of electrically insulating material |
| CN201724962U (en) * | 2010-06-18 | 2011-01-26 | 常州亿晶光电科技有限公司 | Probe positioning structure of four-point probe test instrument |
| CN202216981U (en) * | 2011-09-08 | 2012-05-09 | 昊诚光电（太仓）有限公司 | Dark box for four-probe test instrument |
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| CN103675455A (en) | 2014-03-26 |
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