CN206832890U - Resistivity test device - Google Patents
Resistivity test device Download PDFInfo
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- CN206832890U CN206832890U CN201720746134.7U CN201720746134U CN206832890U CN 206832890 U CN206832890 U CN 206832890U CN 201720746134 U CN201720746134 U CN 201720746134U CN 206832890 U CN206832890 U CN 206832890U
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Abstract
A kind of this disclosure relates to resistivity test device.The device includes heating furnace, clamping device, resistance measurement unit and processing unit；Clamping device, for clamping testing sample from the both sides of testing sample, so that testing sample is fixed in heating furnace；Resistance measurement unit, including double single bridges measuring circuits, double bridge measuring circuit and switch, testing sample are respectively connected to double single bridges measuring circuits and double bridge measuring circuit；Switch has the first working position and the second working position, and when it is located at the first working position, the resistance of testing sample is obtained using double single bridges measuring circuits, and when it is located at the second working position, the resistance of testing sample is obtained using double bridge measuring circuit；Processing unit is used to determine the resistivity of testing sample according to the contact area between the resistance and testing sample and clamping device of testing sample, the length of testing sample.Thus, it is possible to quickly and accurately know the resistivity of testing sample, and easily operation.
Description
Technical field
This disclosure relates to electronic technology field, in particular it relates to a kind of resistivity test device.
Background technology
In glass production, electric boosting have efficiently, pollution is less and the characteristics of automaticity is high, the electrode used in it is two
Tin oxide electrode brick.Stannic oxide electrode brick is known from room temperature to the electrical resistivity property in actual work temperature, for glass
Furnace design, glass melting etc. have great importance.But at different temperatures, the resistivity of stannic oxide electrode brick has very
It is different, and temperature is higher, and the resistivity of tin ash is smaller.At high temperature, when especially temperature reaches more than 1400 DEG C,
The resistance of tin ash can rate very little (being less than 1 Ω), and resistivity is smaller, and the precision of measurement is more difficult to hold.Therefore, urgently
A set of reliable resistivity measuring device is needed to carry out the accurate resistivity for measuring the small resistor rate material such as stannic oxide electrode brick.
Utility model content
The purpose of the disclosure is in the prior art due to being difficult to the small resistor rate material under accurate measurement hot environment
Resistivity the problem of, there is provided a kind of resistivity test device.
To achieve these goals, the disclosure provides a kind of resistivity test device, and the device includes heating furnace, clamps dress
Put, resistance measurement unit and processing unit；
The clamping device is used to clamp the testing sample from the both sides of testing sample, so that the testing sample is fixed
In in the heating furnace；
The resistance measurement unit includes double single bridges measuring circuit, double bridge measuring circuit and switches, wherein, it is described
Testing sample is respectively connected to double single bridges measuring circuits and the double bridge measuring circuit；The switch has the first work
Make position and the second working position, when the switch is located at first working position, double single bridges measuring circuits are in work
State, to obtain the resistance of the testing sample using double single bridges measuring circuits, when the switch is located at described second
During working position, the double bridge measuring circuit is in running order, described in being obtained using the double bridge measuring circuit
The resistance of testing sample；
The processing unit is used for according to the resistance of the testing sample and the testing sample and the clamping device
Between contact area, the length of the testing sample determine the resistivity of the testing sample.
The processing unit is additionally operable to the resistance according to the testing sample, controls the switching behaviour of the working position of the switch
Make.
Alternatively, the processing unit is used for the resistance according to the testing sample, controls the working position of the switch
Handover operation, including：
The processing unit is used for the resistance in the testing sample got using double single bridges measuring circuits
When meeting the first preparatory condition, switch the switch and arrive second working position, measured with switching to using the double bridge
Circuit obtains the resistance of the testing sample, wherein, first preparatory condition includes：The resistance hinders more than or equal to target
Value；Or the resistance be less than the target resistance and and the difference of the target resistance be less than the first preset difference value；
For meeting that second is default in the resistance of the testing sample got using the double bridge measuring circuit
During condition, switch the switch and arrive first working position, to switch to using described in double single bridges measuring circuits acquisitions
The resistance of testing sample, wherein, second preparatory condition includes：The resistance is less than or equal to the target resistance；Or
The resistance be more than the target resistance and and the difference of the target resistance be less than the second preset difference value.
Alternatively, the clamping device includes the first jackscrew, the second jackscrew, the first spud pile, the second spud pile, the first top
Bar, the second push rod, the first spring and second spring, wherein, first jackscrew, first spud pile, first push rod
Be located at the side of the heating furnace with first spring, second jackscrew, second spud pile, second push rod and
The second spring is located at the opposite side of the heating furnace, passes through institute between first jackscrew and one end of first push rod
The connection of the first spring is stated, is connected between second jackscrew and one end of second push rod by the second spring, wherein,
The first jack is provided with first spud pile, first jackscrew is inserted into first jack of first spud pile
It is interior, to fix first jackscrew by first spud pile, it is provided with the second jack on second spud pile, described the
Two jackscrews are inserted into second jack of second spud pile, to fix second top by second spud pile
The other end of silk, the other end of first push rod and second push rod is pasted with conducting strip, and the testing sample is located in
Between two conducting strips, and double single bridges measuring circuits and double bridge measurement are respectively connected to by the conducting strip
Circuit.
Alternatively, the conducting strip is platinum piece.
Alternatively, described device also includes：
Oxidation, it is positioned in the heating furnace, filled with protective gas in the oxidation, for preventing
Testing sample is stated to be oxidized.
Alternatively, the protective gas is argon gas.
Alternatively, the testing sample is stannic oxide electrode brick.
Alternatively, the processing unit is additionally operable to the resistance of the testing sample got according to the resistance measurement unit
The contact area of value and the testing sample and the clamping device, the length of the testing sample treat test sample described in determining
The resistivity of product.
The technical scheme provided by this disclosed embodiment can include the following benefits：By clamping dress by testing sample
It is fixed in heating furnace, then obtains the resistance of testing sample by double single bridges measuring circuits or double bridge measuring circuit
Value, and it is to be measured to determine according to the contact area between the resistance and testing sample and clamping device, the length of testing sample
The resistivity of sample, so, it can quickly and accurately know the resistivity of testing sample, and easily operation.In addition, resistance is surveyed
Measure unit structure is simple, cost is low.
Other feature and advantage of the disclosure will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is for providing further understanding of the disclosure, and a part for constitution instruction, with following tool
Body embodiment is used to explain the disclosure together, but does not form the limitation to the disclosure.In the accompanying drawings：
Fig. 1 is a kind of structural representation of resistivity test device according to an exemplary embodiment.
Fig. 2A is a kind of schematic diagram of double single bridges measuring circuits according to an exemplary embodiment.
Fig. 2 B are a kind of schematic diagrames of double bridge measuring circuit according to an exemplary embodiment.
Fig. 3 is a kind of structural representation of resistivity test device according to another exemplary embodiment.
Fig. 4 is a kind of structural representation of resistivity test device according to another exemplary embodiment.
Fig. 5 A are a kind of structural representations of resistivity test device according to another exemplary embodiment.
Fig. 5 B are a kind of structural representations of resistivity test device according to another exemplary embodiment.
Fig. 6 is the homologous thread between the temperature and resistivity of a kind of testing sample according to an exemplary embodiment
Figure.
Fig. 7 is a kind of flow chart of method of measuring resistivity according to an exemplary embodiment.
Description of reference numerals
The clamping device of 1 heating furnace 2
The processing unit of 3 resistance measurement unit 4
The oxidation of 5 testing sample 6
11 12 insulating trips of bottom
The jackscrew of 21 first jackscrew 22 second
The spud pile of 23 first spud pile 24 second
The push rod of 25 first push rod 26 second
The second spring of 27 first spring 28
The 29 single bridges measuring circuits of conducting strip 31 pairs
32 double bridge measuring circuits 33 switch
Embodiment
The embodiment of the disclosure is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explained the disclosure, is not limited to the disclosure.
Fig. 1 is a kind of structural representation of resistivity test device according to an exemplary embodiment.Such as Fig. 1 institutes
Show, the resistivity test device can include heating furnace 1, clamping device 2, resistance measurement unit 3 and processing unit 4.The clamping
Device 2 can be used for clamping testing sample 5 from the both sides of testing sample 5, so that the testing sample 5 is fixed in heating furnace 1.
Resistance measurement unit 3 can include double single bridges measuring circuit 31, double bridge measuring circuit 32 and switches 33.Its
In, switch 33 has the first working position and the second working position, when switch 33 is located at the first working position, double single bridges measuring circuits
31 is in running order, at this point it is possible to the resistance of testing sample 5 be obtained using this pair of single bridges measuring circuit 31, when switch 33
During positioned at the second working position, double bridge measuring circuit 32 is in running order, can now utilize double bridge measurement electricity
Road 32 obtains the resistance of testing sample 5.
Double 'single bridge' refers to two " single bridges " or twice " single bridges ", and double single bridges measuring circuits 31 can be used for surveying
The resistance of small resistor material is measured, its operation principle is as shown in Figure 2 A.Wherein, R0For measuring resistance, RxFor the resistance of testing sample,
rx、r0For resistance box, G is to balance indicator, A, B R0Voltage jointer, C, D RxVoltage jointer, A ', B ', C ', D ' point
Current joint that Wei be A, B, C, D not corresponding, RfAll-in resistance between the voltage jointer of B, C two is (wherein, including between B, C
All contact resistances and conductor resistance), S is a double-pole double throw switch, and E is below 30V dc source.
As switch S and X side contacts (i.e. S and RxVoltage jointer contact) and balance indicator G when reaching balance, resistance
Case r0、rxNumerical value be respectively r0x、rxx, that is, have
As switch S and O side contacts (i.e. S and R0Voltage jointer contact), and when G reaches balance, resistance box r0、rxNumber
Value is respectively r00、rx0, that is, have
It can be obtained with (2) by equation (1)
Double bridge measuring circuit 32 can be used for the resistance for measuring big resistance material, and its operation principle is as shown in Figure 2 B.
Wherein, E is below 30V dc source, and G ' is galvanometer, RxFor the resistance of testing sample, RnAdjustable resistance is used to compare, R is
Slide rheostat, for adjusting the operating voltage of double bridge measuring circuit 32.RxAnd RnRespectively there are two pairs of potential connectors, C1And C2
For RxCurrent joint, Cn1And Cn2For RnCurrent joint, P1And P2For RxVoltage jointer, Pn1And Pn2For RnVoltage jointer.
, can be by R in order to exclude and reduce connection resistance and influence of the contact resistance to measurement resultxCurrent joint C1、C2It is arranged on
RxVoltage jointer P1、P2Outside.Compare and use adjustable resistance RnCurrent joint Cn2With the resistance R of testing samplexElectric current connect
Head C2Connected with the heavy gauge wire that resistance is r (known resistance).R1、R1'、R2And R'2It is arm resistance, its resistance is in l0 Ω
More than, I be the double bridge measuring circuit 32 total current, IgThe electric current measured for galvanometer G ', I1To pass through resistance R1's
Electric current, I1' it is to pass through resistance R1' electric current, InTo pass through resistance RnElectric current.
Adjust R1、R1' and R2、R2' double bridge is balanced, that is, make it that the current potential at galvanometer G ' both ends is equal, i.e.,
Electric current Ig=0, according to Kirchhoff's law, equation group can be obtained：
Solving equations (4) can obtain
Processing unit 4 can be used for the resistance and testing sample of the testing sample 5 got according to resistance measurement unit 3
5 determine the resistivity of testing sample 5 with the contact area of clamping device 2, the length of testing sample 5.
Illustratively, the resistivity of testing sample 5 can be determined by below equation (6)：
Wherein, P represents the resistivity of the testing sample；RxRepresent the resistance of the testing sample；S represents described to be measured
The contact area of sample and the clamping device；L represents the length of the testing sample.
In one embodiment, switching the handover operation of 33 working position can be opened by manually operated this of staff
33 are closed to complete.
In another embodiment, switching the handover operation of 33 working position can be controlled by processing unit 4, i.e.,
Above-mentioned processing unit 4 can be also used for the resistance according to testing sample 5, the handover operation of the working position of controlling switch 33.This
Sample can not only save labour, and can ensure the best opportunity of working position switching, lift the precision of resistance measurement, and then
Get the high resistivity value of accuracy.
Specifically, in the case where switch 33 is located at the first working position, obtained using double single bridges measuring circuits 31
The resistance of testing sample 5 is taken, when the resistance of the testing sample meets the first preparatory condition, switch 33 to the second can be switched
Working position, the resistance of testing sample 5 is obtained to switch to using double bridge measuring circuit 32；The second work is in switch 33
It is the resistance that testing sample 5 is obtained using double bridge measuring circuit 32, when the resistance of the testing resistance in the case of making position
When value meets the second preparatory condition, the 33 to the first working position of switch can be switched, double single bridges measuring circuits are utilized to switch to
31 obtain the resistance of testing sample 5.
Heating furnace 1 can include Si-Mo rod heating furnace and temperature control unit, and the resistivity test device can be by this
Si-Mo rod heating furnace is heated, and the speed of heating is controlled by temperature control unit.Furthermore it is also possible to pass through the temperature
Control unit controls the speed of cooling.
In one embodiment, the resistance of testing sample 5 can be obtained during cooling.For example, in by stove
After temperature rises to operating temperature (for example, 1400 DEG C), cooling rate can be controlled in 5 DEG C/min by temperature control unit,
Cooled with 5 DEG C/min speed, and after the 50 DEG C of insulation 10min that often cool, measured with resistance measuring unit to be measured
The resistance of sample, it can so ensure that the in-furnace temperature of heating furnace is uniform, so as to ensure the accuracy of resistance measurement.
Because double single bridges measuring circuits 31 are suitable to the resistance of measurement small resistor material (for example, resistance is less than or equal to 1
Ω), double bridge measuring circuit 32 is more suitable for measuring the resistance of big resistance material (for example, resistance than double single bridges measuring circuits 31
Value is more than 1 Ω).If measuring the resistance of testing sample 5 in temperature-fall period, when the in-furnace temperature of heating furnace 1 is higher, test sample is treated
The resistance of product is relatively small, and so, switch 33 can be initially placed in the first working position by processing unit 4, i.e., first using double single
Bridge measuring circuit 31 obtains the resistance of testing sample 5.
Illustratively, first preparatory condition can be that the resistance of the testing sample 5 is more than or equal to target resistance.It is specific next
Say, in temperature-fall period, switching switch 33 is placed in the first working position first, treated using double single bridges measuring circuits 31 to obtain
The resistance of test sample product 5, can be by the switching of switch 33 when processing unit 4 detects that the resistance value is more than or equal to target resistance
To the second working position, the resistance is then obtained using double bridge measuring circuit 32.
Again illustratively, first preparatory condition can be the testing sample 5 resistance be less than target resistance and with the target
The difference of resistance is less than the first preset difference value.Specifically, switch 33 can be initially placed in the first working position by processing unit 4, i.e.,
First the resistance of testing sample 5 is obtained using double single bridges measuring circuits 31.When processing unit 4 detects that the resistance is less than mesh
Mark resistance and and the difference of target resistance when being less than the first preset difference value, can will switch 33 and switch to the second working position, then
The resistance is obtained using double bridge measuring circuit 32 again.So, the accuracy of resistance measurement, Er Qieke can not only be lifted
To ensure the stability of measurement result.
In another embodiment, the resistance of testing sample 5 can be obtained during heating.For example, working as to treat
After test sample product 5 are fixed in heating furnace, firing rate can be controlled in 5 DEG C/min by temperature control unit, will treated
Test sample product 5 are heated in heating furnace with 5 DEG C/min firing rate, similarly, in order to ensure the accuracy of resistance measurement
With the stability of measurement result, after 10min can be incubated with every 50 DEG C of heating, testing sample 5 is obtained with resistance measuring unit
Resistance.
If obtaining the resistance of testing sample 5 during heating, when the in-furnace temperature of heating furnace 1 is relatively low, test sample is treated
The resistance of product 5 is relatively large, and switch 33 can be initially placed in the second working position by processing unit 4, i.e., use double bridge first
Measuring circuit 32 obtains the resistance of testing sample 5.
Illustratively, second preparatory condition can be that the resistance of the testing sample 5 is less than or equal to target resistance.It is specific next
Say, in temperature-rise period, switching switch 33 is placed in the second working position first, treated using double bridge measuring circuit 32 to obtain
The resistance of test sample product 5, when processing unit 4 detects that the resistance is less than or equal to target resistance, switch 33 can be switched to
First working position, then obtain the resistance using double single bridges measuring circuits 31 again.In this manner it is ensured that the essence of resistance measurement
Exactness.
Again illustratively, second preparatory condition can be the testing sample 5 resistance be more than target resistance and with the target
The difference of resistance is less than the second preset difference value.Specifically, switch 33 can be initially placed in the second working position by processing unit 4, i.e.,
The resistance of testing sample 5 is obtained using double bridge measuring circuit 32 first, when processing unit 4 detects that the resistance is more than mesh
The mark resistance and difference between the target resistance is when being less than the second preset difference value, can will switch 33 and switch to the second work
Position, then obtain the resistance using double single bridges measuring circuits 31.
In addition, the target resistance, the first preset difference value and the second preset difference value can be the values of user's setting, can also
It is the empirical value of acquiescence, the target resistance may, for example, be 1 Ω.It should be noted that first preset difference value and this is second pre-
If difference can be with equal, can also be unequal, it is not especially limited in the disclosure.
The technical scheme provided by this disclosed embodiment can include the following benefits：By clamping dress by testing sample
It is fixed in heating furnace, then obtains the resistance of testing sample by double single bridges measuring circuits or double bridge measuring circuit
Value, and it is to be measured to determine according to the contact area between the resistance and testing sample and clamping device, the length of testing sample
The resistivity of sample, so, it can quickly and accurately know the resistivity of testing sample, and easily operation.In addition, resistance is surveyed
Measure unit structure is simple, cost is low.
Fig. 3 is a kind of structural representation of resistivity test device according to another exemplary embodiment.Such as Fig. 3 institutes
Show, clamping device 2 can include the first jackscrew 21, the second jackscrew 22, the first spud pile 23, the second spud pile 24, the first push rod
25th, the second push rod 26, the first spring 27 and second spring 28.Wherein, the first jackscrew 21, the first spud pile 23, the first push rod 25
It is located at the side of heating furnace 1, the second jackscrew 22, the second spud pile 24, the second push rod 26 and second spring 28 with the first spring 27
Positioned at the opposite side of heating furnace 1, also, connected between one end of the first jackscrew 21 and the first push rod 25 by the first spring 27,
Connected between one end of second jackscrew 22 and the second push rod 26 by second spring 28.In addition, it can be set on the first spud pile 23
The first jack is equipped with, the first jackscrew 21 is inserted into first jack, to fix the first jackscrew 21 by the first spud pile 23；The
The second jack can also be provided with two spud piles 24, the second jackscrew 22 is inserted into second jack, to be fixed by second
The second jackscrew 22 is fixed in stake 24.The other end of the other end of first push rod 25 and the second push rod 26 can be pasted with conducting strip
29, so, testing sample 5 is located between two conducting strips 29, and is respectively connected to double single bridges by conducting strip 29
Measuring circuit 31 and double bridge measuring circuit 32.
In addition, the first jackscrew 21 and the second jackscrew 22 can be the screw type jackscrew with boss circular seat, its material can be with
E.g. iron, ferroalloy etc.；First spud pile 23 and the second spud pile 24, which can be fixed on, hanging to be used to place the resistivity
On the platform of measurement apparatus, its material may, for example, be iron, ferroalloy etc.；First spring 27 and second spring 28 can be high temperature
Spring, it is flexible below 900 DEG C；First push rod 25 and the second push rod 26 can be resistant to elevated temperatures materials, for example, high zirconium
Brick, aluminum oxide etc.；Conducting strip 29 may, for example, be platinum piece, copper sheet etc..
Fig. 4 is a kind of structural representation of resistivity test device according to another exemplary embodiment.Such as Fig. 4 institutes
Show, above-mentioned resistivity test device can also include oxidation 6, be positioned in heating furnace 1, in the oxidation 6
Filled with protective gas, testing sample 5 can be prevented to be oxidized, and the air pressure in the oxidation 6 is more than external atmosphere pressure,
One uniform environment of temperature can be provided for resistance measurement, ensure that the reliability and stability of resistance measurement.Illustratively, should
Protective gas can be argon gas, nitrogen etc..
Fig. 5 A are a kind of structural representations of resistivity test device according to another exemplary embodiment.Such as Fig. 5 A
Shown, above-mentioned heating furnace 1 can include bottom 11, and the bottom 11 is used to carrying testing sample 5, and it be can oscilaltion
, for the testing sample 5 to be transported to heating furnace 1.
Fig. 5 B are a kind of structural representations of resistivity test device according to another exemplary embodiment.Such as Fig. 5 B
Shown, the upper surface place mat of above-mentioned bottom 11 has insulating trip 12, for placing testing sample 5, so can further be lifted
The accuracy of resistance measurement.
In addition, the testing sample 5 may, for example, be stannic oxide electrode brick, wire, copper rod etc..Wherein, when treating test sample
When product 5 are stannic oxide electrode brick, its shape can be cuboid, and length can be in the range of 2mm~200mm, and width can be with
, highly can be in the range of 2mm~50mm in the range of 2mm~50mm.
Furthermore it is also possible to according to the resistivity of the testing sample 5 in the room temperature got to operating temperature range, draw out
Homologous thread figure between the temperature and resistivity of testing sample 5 as shown in Figure 6, in such manner, it is possible to it is clearer, get information about
The situation for varying with temperature and changing to resistivity.
In addition, above-mentioned resistivity test device can also include display device, for showing the current resistance of testing sample
At least one of homologous thread figure between the temperature and resistivity of value, current resistivity and testing sample.
Fig. 7 is a kind of flow chart of method of measuring resistivity according to an exemplary embodiment, and this method can make
The resistivity of testing sample 5 is obtained with above-mentioned resistivity test device.As shown in fig. 7, this method can include：
In step 701, after testing sample is fixed in heating furnace, control heating furnace carries out alternating temperature operation.
In a step 702, during the alternating temperature of heating furnace, by the handover operation of the working position of controlling switch, to obtain
Take the resistance of testing sample.
In the disclosure, alternating temperature operation can include warming temperature and cooling operates.I.e., it is possible to during heating
The resistance of testing sample 5 is obtained, the resistance of testing sample can also be obtained during cooling.The working position of switch 33 includes
First working position and the second working position, when the switch 33 is located at first working position, double single bridges measuring circuits
31 is in running order, to obtain the resistance of the testing sample 5 using double single bridges measuring circuits 31, when 33, the switch
When second working position, the double bridge measuring circuit 32 is in running order, to be measured using the double bridge
Circuit 32 obtains the resistance of the testing sample 5.
In step 703, according to the contact area between the resistance of testing sample and testing sample and clamping device, treat
The length of test sample product determines the resistivity of testing sample.
Illustratively, the resistivity of testing sample can be determined by above equation (6).
Alternatively, the handover operation of the working position of the control switch, including：By the processing unit 4 according to institute
The resistance of testing sample 5 is stated, controls the handover operation of the working position of the switch 33.
Alternatively, the processing unit 4 controls the working position of the switch 33 according to the resistance of the testing sample 5
Handover operation, including：The processing unit 4 is in the testing sample 5 got using double single bridges measuring circuits 31
Resistance when meeting the first preparatory condition, switch the switch and 33 arrive second working position, to switch to the utilization both arms
Bridge measuring circuit 32 obtains the resistance of the testing sample, wherein, first preparatory condition includes：The resistance be more than or
Equal to target resistance；Or the resistance be less than the target resistance and and the difference of the target resistance to be less than first default poor
Value；When the resistance of the testing sample 5 got using the double bridge measuring circuit 32 meets the second preparatory condition,
Switch the switch and 33 arrive first working position, with switch to obtained using double single bridges measuring circuits 31 it is described to be measured
The resistance of sample 5, wherein, second preparatory condition includes：The resistance is less than or equal to the target resistance；Or institute
State resistance more than the target resistance and and the difference of the target resistance be less than the second preset difference value.
Alternatively, the testing sample 5 is stannic oxide electrode brick.
The preferred embodiment of the disclosure is described in detail above in association with accompanying drawing, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical scheme of the disclosure
Monotropic type, these simple variants belong to the protection domain of the disclosure.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the disclosure to it is various can
The combination of energy no longer separately illustrates.
In addition, it can also be combined between a variety of embodiments of the disclosure, as long as it is without prejudice to originally
Disclosed thought, it should equally be considered as disclosure disclosure of that.
Claims (8)
1. a kind of resistivity test device, it is characterised in that including heating furnace (1), clamping device (2), resistance measurement unit (3)
With processing unit (4)；
The clamping device (2) is used to clamp the testing sample (5) from the both sides of testing sample (5), so that described treat test sample
Product (5) are fixed in the heating furnace (1)；
The resistance measurement unit (3) includes double single bridges measuring circuits (31), double bridge measuring circuit (32) and switch
(33), wherein, the testing sample (5) is respectively connected to double single bridges measuring circuits (31) and double bridge measurement electricity
Road (32)；The switch (33) has the first working position and the second working position, when the switch (33) is positioned at the described first work
During position, double single bridges measuring circuits (31) are in running order, to be obtained using double single bridges measuring circuits (31)
The resistance of the testing sample (5), when the switch (33) is located at second working position, the double bridge measuring circuit
(32) it is in running order, to obtain the resistance of the testing sample (5) using the double bridge measuring circuit (32)；
The processing unit (4) is used for resistance and the testing sample (5) and the clamping according to the testing sample (5)
The length of contact area, the testing sample (5) between device (2) determines the resistivity of the testing sample (5).
2. device according to claim 1, it is characterised in that the processing unit (4) is additionally operable to treat test sample according to
The resistance of product (5), control the handover operation of the working position of the switch (33).
3. device according to claim 2, it is characterised in that the processing unit (4) is used for according to the testing sample
(5) resistance, the handover operation of the working position of the switch (33) is controlled, including：
The processing unit (4) is used in the testing sample (5) got using double single bridges measuring circuits (31)
Resistance when meeting the first preparatory condition, switch the switch (33) and arrive second working position, to switch to using described pair
Arm bridge measuring circuit (32) obtains the resistance of the testing sample (5), wherein, first preparatory condition includes：The resistance
Value is more than or equal to target resistance；Or the resistance be less than the target resistance and and the difference of the target resistance be less than the
One preset difference value；
For meeting that second is pre- in the resistance of the testing sample (5) got using the double bridge measuring circuit (32)
If during condition, switch the switch (33) and arrive first working position, double single bridges measuring circuits are utilized to switch to
(31) resistance of the testing sample (5) is obtained, wherein, second preparatory condition includes：The resistance is less than or equal to institute
State target resistance；Or the resistance be more than the target resistance and and the difference of the target resistance be less than the second preset difference value.
4. device according to claim 1, it is characterised in that the clamping device (2) includes the first jackscrew (21), second
Jackscrew (22), the first spud pile (23), the second spud pile (24), the first push rod (25), the second push rod (26), the first spring (27)
With second spring (28), wherein, first jackscrew (21), first spud pile (23), first push rod (25) and institute
State the side that the first spring (27) is located at the heating furnace (1), second jackscrew (22), second spud pile (24), institute
State the second push rod (26) and the second spring (28) be located at the opposite side of the heating furnace (1), first jackscrew (21) and
Connected between one end of first push rod (25) by first spring (27), second jackscrew (22) and described second
Connected between one end of push rod (26) by the second spring (28), wherein, the is provided with first spud pile (23)
One jack, first jackscrew (21) are inserted into first jack of first spud pile (23), to pass through described
Fixed first jackscrew (21) of one spud pile (23), is provided with the second jack on second spud pile (24), and described second
Jackscrew (22) is inserted into second jack of second spud pile (24), with fixed by second spud pile (24)
Second jackscrew (22), the other end of first push rod (25) and the other end of second push rod (26) are pasted with conduction
Piece (29), the testing sample (5) are located between two conducting strips (29), and are respectively connected to institute by the conducting strip (29)
State double single bridges measuring circuits (31) and the double bridge measuring circuit (32).
5. device according to claim 4, it is characterised in that the conducting strip (29) is platinum piece.
6. according to the device any one of claim 1-5, it is characterised in that described device also includes：
Oxidation (6), it is positioned in the heating furnace (1), filled with protective gas in the oxidation (6), is used for
The testing sample (5) is prevented to be oxidized.
7. device according to claim 6, it is characterised in that the protective gas is argon gas.
8. according to the device any one of claim 1-5, it is characterised in that the testing sample (5) is tin ash
Electrode block.
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| CN201720746134.7U CN206832890U (en) | 2017-06-23 | 2017-06-23 | Resistivity test device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064642A (en) * | 2017-06-23 | 2017-08-18 | 东旭科技集团有限公司 | Resistivity test device and method |
| CN111103525A (en) * | 2019-12-26 | 2020-05-05 | 奥士康科技股份有限公司 | Method for quickly finding point of abnormal resistance value of carbon wire |
-
2017
- 2017-06-23 CN CN201720746134.7U patent/CN206832890U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064642A (en) * | 2017-06-23 | 2017-08-18 | 东旭科技集团有限公司 | Resistivity test device and method |
| CN107064642B (en) * | 2017-06-23 | 2023-12-26 | 东旭光电科技股份有限公司 | Resistivity measuring device and method |
| CN111103525A (en) * | 2019-12-26 | 2020-05-05 | 奥士康科技股份有限公司 | Method for quickly finding point of abnormal resistance value of carbon wire |
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Assignee: Hunan Xinghuai New Material Technology Co.,Ltd. Assignor: DONGXU OPTOELECTRONIC TECHNOLOGY Co.,Ltd. Contract record no.: X2022110000065 Denomination of utility model: Resistivity measuring device Granted publication date: 20180102 License type: Common License Record date: 20221101 |