Carbon nanotube resistance measurement auxiliary device

Abstract

The present application relates to carbon tube resistance measurement auxiliary device, carbon tube resistance measurement auxiliary device includes positioning seat, positioning seat is equipped with axial positioning surface, axial positioning surface is used for with carbon tube outer surface contact and carbon tube axis is positioned, positioning seat is equipped with two groups of contact points, two groups of contact points are arranged in the extension direction of carbon tube axis positioned by axial positioning surface, each group of contact points includes current contact and voltage contact, the current contact and voltage contact of each group of contact points are close to set up and all have for with carbon tube abutment abutment end and for external connection measuring circuit external end, positioning seat is equipped with axial positioning structure still, axial positioning structure is used for with carbon tube end stop cooperation to limit carbon tube axial position, one group of contact points is close to axial positioning structure, through positioning seat and position established two groups of contact points cooperate and carry out carbon tube resistance measurement, can effectively reduce the influence of human factors on measurement results, measurement error is small, it is convenient to operate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of resistance measuring device, and particularly relates to a carbon tube resistance value measuring auxiliary device. BACKGROUND

[0002] The cubic press is a synthetic device of superhard material. In the synthetic process of the cubic press, the carbon tube as a main heating element is an important heat source in the necessary high temperature and high pressure conditions for producing synthetic diamond and polycrystalline diamond compact (PDC). Whether the carbon tube heating is uniform and stable directly determines the quality of the synthetic product. The more stable the resistance value of the carbon tube of the same specification is in the same batch of synthetic product, the smaller the current change of the cubic press is in the synthetic process, and the smaller the difference between the sintering temperatures of different blocks of product is, which is more conducive to the performance stability and consistency of the synthetic product. The stability and accuracy of the resistance of the carbon tube are crucial to the control of the synthetic temperature. Therefore, the resistance value of the carbon tube is measured one by one before the synthetic block is assembled.

[0003] The resistance value of the carbon tube is small, generally several to tens of milliohms. The existing measurement method is to use the Kelvin four-wire measurement principle, and hold the carbon tube wall to be measured by manually holding the alligator clips of the measuring instrument. Two alligator clips are respectively clamped at both ends of the carbon tube, each alligator clip has a group of contacts, including a current contact and a voltage contact. The resistance value of the carbon tube is calculated by measuring the current value and voltage value of the carbon tube in the on-circuit.

[0004] However, since the texture of the carbon tube is not uniform, the resistance value will be different due to different measurement positions when manually holding the measurement, and the force of manually holding the carbon tube by the alligator clips will affect the contact quality. In the process of manually holding the measurement, the contact area between the carbon tube and the contact will be affected by the hand shaking, so that the resistance value of the carbon tube fluctuates, and the measurement error is large. At the same time, when the demand for carbon tubes is large, the above-mentioned manual measurement method for large batch measurement will make the labor intensity of workers large and the measurement efficiency low. SUMMARY

[0005] The present application aims to provide a carbon tube resistance value measuring auxiliary device to solve the problems of large measurement error, large labor intensity and low efficiency of the existing manual measurement method.

[0006] The technical scheme of the carbon tube resistance value measuring auxiliary device of the present application is as follows:

[0007] The carbon tube resistance value measurement auxiliary device comprises a positioning seat, an axial positioning surface is arranged on the positioning seat, the axial positioning surface is used for being in contact with the outer circumferential surface of the carbon tube and positioning the axis of the carbon tube, two groups of contacts are arranged on the positioning seat, the two groups of contacts are arranged in the extension direction of the axis of the carbon tube positioned by the axial positioning surface, each group of contacts comprises a current contact and a voltage contact, the current contact and the voltage contact of each group of contacts are arranged close to each other, the current contact and the voltage contact each have an abutting end used for abutting against the carbon tube and an external connection end used for externally connecting a measurement circuit, an axial positioning structure is further arranged on the positioning seat, the axial positioning structure is used for being in abutting cooperation with the end of the carbon tube to limit the axial position of the carbon tube, and one group of contacts is arranged close to the axial positioning structure.

[0008] Beneficial effects: by adopting the carbon tube resistance value measurement auxiliary device, when the carbon tube resistance value is measured, the position of the carbon tube is positioned by the axial positioning surface and the axial positioning structure on the positioning seat, and the current measurement loop and the voltage measurement loop can be connected by the two current contacts and the two voltage contacts of the two groups of contacts respectively, the carbon tube resistance value measurement based on the Kelvin four-wire measurement principle can be realized, the carbon tube resistance value measurement is performed by the positioning seat and the two groups of contacts with the position being fixed, compared with the manual handheld measurement mode, the influence of human factors on the measurement result can be effectively reduced, the measurement error is reduced, the measurement operation is more convenient, multi-point measurement is facilitated, the labor intensity of workers is reduced, and meanwhile, the automatic measurement by means of a mechanical hand is facilitated, and then the measurement efficiency is greatly improved on the premise of ensuring the measurement accuracy.

[0009] Further, the axial positioning surface comprises a first positioning surface and a second positioning surface, the first positioning surface and the second positioning surface are oppositely arranged and arranged in a V shape, and the axial positioning surface is used for tangentially abutting the outer circumferential surface of the carbon tube.

[0010] Beneficial effects: the positioning seat and the carbon tube can be reliably contacted by the two axial positioning surfaces arranged in a V shape, the positioning effect is ensured, the stability of the carbon tube positioning is ensured by supporting the carbon tube from two sides, the carbon tube is prevented from shaking, and the measurement accuracy is ensured.

[0011] Further, the positioning seat is a V-shaped block, a V-shaped groove of the positioning seat forms a V-shaped positioning groove, and two opposite groove walls of the V-shaped groove respectively constitute the first positioning surface and the second positioning surface.

[0012] Beneficial effects: the V-shaped block is adopted, and then the groove wall surface of the V-shaped groove on the V-shaped block is used to form the axial positioning surface for positioning the carbon tube, and the structure is simple and convenient to process.

[0013] Further, the positioning seat is provided with a baffle at one end of the V-shaped positioning groove, and the baffle constitutes the axial positioning structure.

[0014] Beneficial effects: thus, the non-through V-shaped positioning groove is machined on the block-shaped blank, a baffle is formed at one end of the V-shaped positioning groove, the axial positioning structure is conveniently arranged, the structure is simple, and the V-shaped positioning groove is easy to manufacture.

[0015] Further, the two groups of contacts are arranged at the groove bottom of the V-shaped positioning groove, the groove bottom of the V-shaped positioning groove is provided with contact through holes for respectively fixing and penetrating the current contacts and the voltage contacts, the current contacts and the voltage contacts are linearly extended, the current contacts and the voltage contacts each have an inner end protruding from the groove bottom of the V-shaped positioning groove and an outer end protruding from the side surface of the positioning seat and facing away from the V-shaped positioning groove, the inner end constitutes an abutting end, and the outer end constitutes an external end.

[0016] Beneficial effects: by arranging the two groups of contacts at the groove bottom of the V-shaped positioning groove, the contacts in the middle are contacted after the carbon tube is positioned and supported on the positioning seat through the two-side axial positioning surfaces, and the contact is reliable.

[0017] Further, the groove bottom of the V-shaped positioning groove is a planar groove bottom, and the two groups of contacts are arranged on the planar groove bottom.

[0018] Beneficial effects: by forming the planar groove bottom, the contact through holes are conveniently machined, and the current contacts and the voltage contacts of each group of contacts are conveniently flush to ensure good contact with the carbon tube.

[0019] Further, the current contacts and the voltage contacts of each group of contacts are arranged in parallel and close to each other in the groove width direction of the V-shaped positioning groove.

[0020] Beneficial effects: by arranging the current contacts and the voltage contacts of each group of contacts in parallel and close to each other, the current contacts and the voltage contacts are as close to each other as possible and as close to the end of the carbon tube as possible, the measurement accuracy can be improved, and the contacts are conveniently installed.

[0021] Further, the carbon resistance value measurement auxiliary device further comprises a pressing seat, the pressing seat is oppositely matched with the positioning seat, and is used for pressing the carbon tube to the axial positioning surface to ensure the positioning contact between the carbon tube and the axial positioning surface.

[0022] Beneficial effects: by matching the pressing seat provided with the V-shaped pressing groove with the positioning seat provided with the V-shaped positioning groove to form the pressing and fixing of the carbon tube, the structural consistency of the pressing seat and the positioning seat is good, and the pressing seat and the positioning seat are conveniently machined and formed.

[0023] Further, the carbon resistance value measurement auxiliary device further comprises a pressing seat, the pressing seat is oppositely matched with the positioning seat, and is used for pressing the carbon tube to the axial positioning surface to ensure the positioning contact between the carbon tube and the axial positioning surface.

[0024] Beneficial effect: by setting the pressing seat, the carbon tube can be pressed on the positioning seat, ensuring the reliable positioning of the carbon tube and the stability of the carbon tube during the measurement process.

[0025] Further, the current contact and the voltage contact are both spring pins, and the elastic end of the spring pin constitutes the abutting end.

[0026] Beneficial effect: by forming elastic contact between the spring pin and the carbon tube, it is beneficial to adapt to the measurement of carbon tubes of different diameters, improve the universality of the carbon tube resistance measurement auxiliary device, and reduce the cost.

[0027] Further, the group of contacts away from the axial positioning structure is adjustably installed on the positioning seat in the extension direction of the carbon tube axis positioned by the axial positioning structure.

[0028] Beneficial effect: by setting the adjustable group of contacts, when measuring carbon tubes of different lengths, the position of the group of contacts away from the axial positioning structure can be adjusted to ensure contact near the end of the carbon tube, which is suitable for measuring carbon tubes of different lengths and improves the universality.

[0029] Further, the group of contacts away from the axial positioning structure is slidably arranged relative to the positioning seat.

[0030] Beneficial effect: by slidingly arranging the group of contacts, the position of the group of contacts can be adjusted steplessly, which is flexible and convenient, and has better universality.

[0031] Further, the positioning seat is provided with a guide through slot, a sliding block is slidably arranged in the guide through slot, the group of contacts away from the axial positioning structure is arranged on the sliding block, and the group of contacts away from the axial positioning structure is slid relative to the positioning seat by sliding the sliding block in the guide through slot. A positioning long slot is provided beside the slot opening of the guide through slot facing away from the axial positioning surface, the sliding block has a stop edge opposite the positioning long slot, the stop edge is provided with a fixing hole, a locking screw is arranged in the fixing hole, the locking screw is a self-tapping screw, and the stop edge of the sliding block is screwed into the positioning long slot and embedded in the slot wall by the self-tapping screw to realize the pressing and fixing of the sliding block on the positioning seat.

[0032] Beneficial effect: by sliding the sliding block in the guide through slot, the group of contacts away from the axial positioning structure can be slid relative to the positioning seat, which is simple in structure and easy to process; at the same time, by fixing the automatic screw and the positioning long slot, the sliding block can be fixed on the positioning seat when it is slid to the set position. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The structure diagram of the pressing seat in the embodiment 1 of the carbon tube resistance measurement auxiliary device of the present application when pressing the carbon tube on the positioning seat;

[0034] Figure 2This is a top view of the carbon tube resistance measurement auxiliary device of the present invention when the clamping seat presses the carbon tube onto the positioning seat in Embodiment 1;

[0035] Figure 3 for Figure 1 Schematic diagram of the center positioning seat;

[0036] Figure 4 for Figure 1 Front view of the center positioning seat;

[0037] Figure 5 for Figure 1 Left view of the center positioning seat;

[0038] Figure 6 for Figure 1 Top view of the center positioning seat;

[0039] Figure 7 This is a schematic diagram of the structure of the clamping seat pressing the carbon tube onto the positioning seat in Embodiment 2 of the carbon tube resistance measurement auxiliary device of the present invention;

[0040] Figure 8 This is a top view of the carbon tube resistance measurement auxiliary device of the present invention, in embodiment 2, when the clamping seat presses the carbon tube onto the positioning seat;

[0041] Figure 9 for Figure 7 Schematic diagram of the center positioning seat;

[0042] Figure 10 for Figure 7 Front view of the center positioning seat;

[0043] Figure 11 for Figure 7 Top view of the center positioning seat;

[0044] Figure 12 for Figure 7 A bottom view of the center positioning seat.

[0045] In the diagram: 1. Positioning seat; 11. V-shaped positioning groove; 12. Voltage contact; 13. Current contact; 14. Baffle; 15. Slider; 16. Guide groove; 17. Positioning slot; 18. Fastening screw; 2. Carbon tube; 3. Pressing seat. Detailed Implementation

[0046] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application and are not intended to limit the present application, i.e., the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application generally described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0047] Therefore, the detailed description of the embodiments of the present application provided below in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without making creative efforts fall within the scope of the present application.

[0048] It should be noted that the relationship terms such as "first" and "second" and the like that can appear in the specific embodiments of the present application are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms such as "include", "contain" or any other variants that can appear are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the elements defined by the possible appearing statements "include a" and the like do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0049] In the description of the present application, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connect" that can appear should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0050] In the description of the present application, unless otherwise explicitly specified and limited, the term "provided with" that can appear should be understood broadly, for example, the object "provided with" can be a part of the body, or arranged separately from the body and connected to the body, and the connection can be detachable or non-detachable. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0051] The application will be further described in detail in connection with the following examples.

[0052] Embodiment 1 of the carbon tube resistance value measuring auxiliary device of the application:

[0053] As shown in Figure 1 , Figure 2 , Figure 3 , the carbon tube resistance value measuring auxiliary device comprises a positioning seat 1 and a pressing seat 3, both of which are V-shaped blocks. A V-shaped groove on the positioning seat 1 forms a V-shaped positioning groove 11, and a V-shaped groove on the pressing seat 3 forms a V-shaped pressing groove. The pressing seat 3 is oppositely matched with the positioning seat 1 to press the carbon tube 2 onto the positioning seat 1. The groove bottom of the V-shaped positioning groove 11 on the positioning seat 1 is provided with two groups of contacts. After the carbon tube 2 is pressed onto the positioning seat 1, the two groups of contacts are in contact with the carbon tube 2, the two groups of contacts are connected to the measuring circuit, and the resistance value of the carbon tube can be measured.

[0054] As shown in Figure 4 , Figure 5 , Figure 6 , the two opposite groove walls of the V-shaped positioning groove 11 on the positioning seat 1 respectively form a first positioning surface and a second positioning surface, and the first positioning surface and the second positioning surface form an axial positioning surface. The axial positioning surface is used to tangentially fit with the outer circumferential surface of the carbon tube 2 and position the axis of the carbon tube 2. By positioning the carbon tube 2 through the two axial positioning surfaces arranged in a V shape, the positioning seat 1 and the carbon tube 2 can form reliable contact, ensure the positioning effect, and avoid the carbon tube 2 from shaking.

[0055] The two groups of contacts on the positioning seat 1 are arranged in the extension direction of the axis of the carbon tube 2 positioned by the two axial positioning surfaces, and are arranged at the two ends of the V-shaped positioning groove. Each group of contacts comprises a current contact 13 and a voltage contact 12. The groove bottom of the V-shaped positioning groove 11 is a flat groove bottom, and the two groups of contacts are arranged on the flat groove bottom. The groove bottom of the V-shaped positioning groove 11 is provided with a plurality of contact through holes for respectively fixing and penetrating the current contacts 13 and the voltage contacts 12. By arranging the two groups of contacts on the groove bottom of the V-shaped positioning groove 11, the carbon tube 2 is in contact with the contacts in the middle after being positioned and supported on the positioning seat 1 by the two axial positioning surfaces, which is conducive to reliable contact. At the same time, by forming a flat groove bottom, it is convenient to process the contact through holes and to make the current contacts 13 and the voltage contacts 12 of each group of contacts flush to ensure good contact with the carbon tube 2.

[0056] The current contact 13 and the voltage contact 12 are linearly extended, the inner end of the current contact 13 and the inner end of the voltage contact 12 protrude from the groove bottom of the V-shaped positioning groove 11 to form an abutting end for abutting with the carbon tube 2, and the outer end of the current contact 13 and the outer end of the voltage contact 12 protrude from the side of the positioning seat 1 away from the V-shaped positioning groove 11 to form an external end for external connection of a measuring circuit. The current contact 13 and the voltage contact 12 of each group of contacts are arranged close to each other, and the current contact 13 and the voltage contact 12 of each group of contacts are arranged in parallel next to each other in the groove width direction of the V-shaped positioning groove 11, and the current contact 13 and the voltage contact 12 belonging to the same group of contacts are insulated from each other, so that the current contact 13 and the voltage contact 12 are as close to each other as possible and as close to the end of the carbon tube 2 as possible, which can improve the measurement accuracy and facilitate the installation of the contacts.

[0057] The positioning seat 1 is provided with a baffle 14 at one end of the V-shaped positioning groove 11, and the baffle 14 forms an axial positioning structure for abutting with the end of the carbon tube 2 to limit the axial position of the carbon tube 2. Among the two groups of contacts, one group of contacts is arranged close to the baffle 14, and the other group of contacts is arranged away from the baffle 14. When the carbon tube is placed on the positioning seat 1, the end of the carbon tube can be naturally stopped by the baffle 14, and the group of contacts arranged close to the baffle 14 can be in contact with the carbon tube at the end of the carbon tube. The baffle 14 is flush with the groove opening of the V-shaped positioning groove 11, so that the baffle 14 can be formed at one end of the V-shaped positioning groove 11 by machining a non-through V-shaped positioning groove 11 on the block blank, which is convenient for setting the axial positioning structure, simple in structure and easy to manufacture.

[0058] The current contact 13 and the voltage contact 12 are both spring needles, and the spring needle is a prior art. The elastic end of the spring needle forms an abutting end. The setting of the spring needle can form elastic contact with the carbon tube 2, which is conducive to adapting to the measurement of carbon tubes 2 of different diameters, improving the universality of the carbon tube resistance value measurement auxiliary device, and reducing the cost.

[0059] The two opposite groove walls of the V-shaped pressing groove on the pressing seat 3 are used to press the carbon tube 2 to press the carbon tube 2 on the V-shaped positioning groove 11 of the positioning seat 1, at the same time, the groove bottom surface of the V-shaped pressing groove on the pressing seat 3 is a plane, and one end of the V-shaped pressing groove is provided with a stop side wall for abutting with the end of the carbon tube 2 to limit the axial position of the carbon tube 2. Similarly, the stop side wall can be formed at one end of the V-shaped pressing groove by machining a non-through V-shaped pressing groove on the block blank. After the pressing seat 3 presses the carbon tube 2 on the positioning seat 1, the groove opening of the V-shaped positioning groove 11 has a spacing with the groove opening of the V-shaped pressing groove, so as to ensure reliable pressing. The pressing seat 3 with the V-shaped pressing groove cooperates with the positioning seat 1 with the V-shaped positioning groove 11 to form a pressing and fixing of the carbon tube 2, so that the structure consistency of the pressing seat 3 and the positioning seat 1 is good, and it is convenient to process and form.

[0060] By adopting the carbon tube resistance value measurement auxiliary device, when carbon tube resistance value measurement is carried out, the position of the carbon tube 2 is positioned by the V-shaped positioning groove 11 and the baffle 14 on the positioning seat 1, and the carbon tube 2 is pressed on the positioning seat 1 by the pressing seat 3, that is, the carbon tube 2 is clamped and positioned by two V-shaped blocks, and the current measurement loop and the voltage measurement loop are connected by two current contacts 13 and two voltage contacts 12 of the two groups of contacts on the positioning seat 1, so that the carbon tube resistance value measurement based on the Kelvin four-wire measurement principle can be realized. By using two V-shaped blocks, the measurement point is fixed at the two ends of the V-shaped block, the measurement contacts are in good contact with the carbon tube 2 by clamping the carbon tube 2 by the two V-shaped blocks, and accurate measurement is realized. By positioning the two groups of contacts with the positioning seat 1, carbon tube resistance value measurement is carried out, compared with the existing manual handheld measurement method, the influence of human factors on the measurement result can be effectively reduced, the measurement error is reduced, the measurement operation is more convenient, multi-point measurement is facilitated, the labor intensity of workers is reduced, and at the same time, it is also beneficial to realize automatic measurement by means of a mechanical hand.

[0061] Embodiment 2 of the carbon tube resistance value measurement auxiliary device in the application:

[0062] The difference between this embodiment and embodiment 1 is that in embodiment 1, one group of contacts away from the axial positioning structure is fixed on the positioning seat, and the position is fixed relative to the axial positioning structure. In this embodiment, as shown in Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12As shown, the bottom of the V-shaped positioning groove 11 of the positioning seat 1 is provided with a guide through groove 16, the guide through groove 16 penetrates the bottom of the V-shaped positioning groove 11 and the side of the positioning seat 1 away from the V-shaped positioning groove 11, the current contact 13 and the voltage contact 12 of the group of contacts away from the baffle 14 are installed on the sliding block 15, and the end of the sliding block 15 away from the V-shaped positioning groove 11 is provided with a blocking edge, the blocking edge is opposite to the side of the positioning seat 1 away from the V-shaped positioning groove 11, and the guide through groove 16 is provided with a positioning long groove 17 at the side groove opening away from the V-shaped positioning groove 11, the positioning long groove 17 is at the side of the guide through groove 16 perpendicular to the extension direction, and the extension direction of the positioning long groove 17 is consistent with the sliding direction of the sliding block 15, the blocking edge of the sliding block 15 is provided with a fixing hole, and the fixing hole is provided with a fastening screw 18, the fastening screw 18 is a self-tapping screw, the positioning seat 1 is made of plastic, and the fastening screw 18 corresponds to the positioning long groove 17, so that when the sliding block 15 slides to a set position, the fastening screw 18 is screwed into the positioning long groove 17 and is fixed with the groove wall, after the sliding block 15 is fixed on the positioning seat 1, the side of the sliding block 15 facing the V-shaped positioning groove 11 is flush with the bottom of the V-shaped positioning groove 11, so that the heights of the two groups of contacts are consistent, and the group of contacts away from the axial positioning structure can be adjustably installed on the positioning seat 1 in the extension direction of the carbon pipe axis positioned by the axial positioning structure on the axial center positioning surface. By adjusting the position of the group of contacts away from the axial positioning structure, the contact at the position close to the end of the carbon pipe can be ensured, the measurement of carbon pipes of different lengths is suitable, and the group of contacts can be steplessly adjusted, so that the adjustment is flexible and convenient, and the universality is better.

[0063] Embodiment 3 of the carbon pipe resistance value measurement auxiliary device in the application:

[0064] The difference between the embodiment and the embodiment 2 is that in the embodiment 2, the group of contacts away from the axial positioning structure is slidably arranged relative to the positioning seat by sliding the sliding block in the guide through groove, and then is adjustably installed on the positioning seat. In the embodiment, a plurality of groups of contact holes are arranged on the bottom of the V-shaped positioning groove along the extension direction of the V-shaped positioning groove, each group of contact holes includes two contact holes for fixing and penetrating the current contact and the voltage contact of the group of contacts away from the axial positioning structure, and the group of contacts away from the axial positioning structure is adjustably installed on the positioning seat by being fixed on different groups of contact holes.

[0065] Embodiment 4 of the carbon pipe resistance value measurement auxiliary device in the application:

[0066] The difference between the embodiment and the embodiment 2 is that in the embodiment 2, the sliding block is provided with a baffle, the side of the notch of the guide channel is provided with a positioning long groove, and the sliding block is fixed in the positioning long groove by a self-tapping screw after sliding to the set position. In the embodiment, the sliding block is arranged in the guide channel and is screwed on the screw rod, the screw rod is supported on the two side walls of the guide channel in the extension direction, a screw nut mechanism is formed, the sliding block is driven to slide in the guide channel by rotating the screw rod, and the position of the sliding block is maintained by the thread cooperation between the sliding block and the screw rod.

[0067] Embodiment 5 of the carbon tube resistance value measurement auxiliary device in the application:

[0068] The difference between the embodiment and the embodiment 1 is that in the embodiment 1, the positioning seat is provided with a baffle at one end of the V-shaped positioning groove, and the baffle constitutes an axial positioning structure. In the embodiment, a stop protruding column is formed at one end of the V-shaped positioning groove of the positioning seat, and the stop protruding column constitutes an axial positioning structure. In other embodiments, the positioning seat is a V-shaped block with a V-shaped groove opened on one side surface, a pin hole is opened at one end of the V-shaped block, a positioning pin is arranged in the pin hole, the positioning pin extends to the position of one end of the V-shaped groove, and the positioning pin constitutes an axial positioning structure for stopping cooperation with the end of the carbon tube.

[0069] Embodiment 6 of the carbon tube resistance value measurement auxiliary device in the application:

[0070] The difference between the embodiment and the embodiment 1 is that in the embodiment 1, the two groups of contacts are arranged on the groove bottom of the V-shaped positioning groove. In the embodiment, the two groups of contacts are arranged on the same side groove wall surface of the V-shaped positioning groove.

[0071] Embodiment 7 of the carbon tube resistance value measurement auxiliary device in the application:

[0072] The difference between the embodiment and the embodiment 1 is that in the embodiment 1, the current contact and the voltage contact are linearly extended, the current contact and the voltage contact each have an inner end protruding from the groove bottom of the V-shaped positioning groove and an outer end protruding from the side surface of the positioning seat away from the V-shaped positioning groove. In the embodiment, the current contact and the voltage contact are curvedly arranged, the V-shaped positioning groove extends forward and backward, and the current contact and the voltage contact each have an inner end protruding from the groove bottom of the V-shaped positioning groove and an outer end protruding from the side surface of the positioning seat in the forward and backward directions.

[0073] Embodiment 8 of the carbon tube resistance value measurement auxiliary device in the application:

[0074] The difference between the embodiment and the embodiment 1 is that in the embodiment 1, the groove bottom of the V-shaped positioning groove is a plane groove bottom, and the two groups of contacts are arranged on the plane groove bottom. In the embodiment, the two side groove wall surfaces of the V-shaped positioning groove intersect, and the two groups of contacts are arranged at positions close to the groove bottom of the two side groove wall surfaces of the V-shaped positioning groove.

[0075] Embodiment 9 of the carbon tube resistance value measurement auxiliary device in the application:

[0076] The difference between the embodiment and the embodiment 1 is that, in the embodiment 1, the positioning seat is a V-shaped block, the pressing seat is a V-shaped block, the V-shaped groove on the pressing seat forms a V-shaped pressing groove, and the two opposite groove walls of the V-shaped pressing groove are used for pressing the carbon tube to press the carbon tube on the V-shaped positioning groove. In the embodiment, the arc grooves are formed on the positioning seat and the pressing seat, and the arc groove on the pressing seat is used for pressing the carbon tube to press the carbon tube on the arc groove on the positioning seat.

[0077] Embodiment 10 of the carbon tube resistance value measurement auxiliary device in the application:

[0078] The difference between the embodiment and the embodiment 1 is that, in the embodiment 1, the current contact and the voltage contact are both spring probes, and the elastic end of the spring probe constitutes the abutting end. In the embodiment, the current contact and the voltage contact are both rigid contacts, the rigid contact has an abutting end for abutting with the carbon tube, the two abutting points are formed on the two side groove walls of the V-shaped positioning groove, and the two abutting points are on the same circumference with the abutting end. The diameter of the circumference is equal to the outer diameter of the carbon tube. At this time, the carbon tube resistance value measurement auxiliary device can only measure one diameter of the carbon tube. After the carbon tube is pressed on the positioning seat, the two side groove walls of the V-shaped positioning groove are tangent to the outer circumferential surface of the carbon tube at the abutting points, and the outer circumferential surface of the carbon tube is in contact with the abutting end of the rigid contact.

[0079] Embodiment 11 of the carbon tube resistance value measurement auxiliary device in the application:

[0080] The difference between the embodiment and the embodiment 1 is that, in the embodiment 1, the current contact and the voltage contact of each group of contacts are arranged in parallel and close to each other in the groove width direction of the V-shaped positioning groove. In the embodiment, the voltage contact is a tubular contact, and the voltage contact of the current contact and the voltage contact belonging to the same group of contacts is coaxially sleeved on the outside of the current contact.

[0081] Embodiment 12 of the carbon tube resistance value measurement auxiliary device in the application:

[0082] The difference between the embodiment and the embodiment 1 is that, in the embodiment 1, the positioning seat is a V-shaped block, the V-shaped groove of the positioning seat forms a V-shaped positioning groove, and the two opposite groove walls of the V-shaped groove constitute the axial positioning surface. In the embodiment, the arc groove is formed on the positioning seat, the arc surface of the arc groove is matched with the outer circumferential surface of the carbon tube, and the arc surface of the arc groove constitutes the axial positioning surface.

[0083] Embodiment 13 of the carbon tube resistance value measurement auxiliary device in the application:

[0084] The embodiment is different from the embodiment 1 in that, in the embodiment 1, the positioning seat is a V-shaped block, the V-shaped groove of the positioning seat forms a V-shaped positioning groove, and two opposite groove walls of the V-shaped groove respectively constitute the first positioning surface and the second positioning surface. In the embodiment, however, left and right rows of wedge-shaped protrusions are arranged on the positioning seat, the wedge-shaped protrusions in each row are arranged at intervals in front and back, the two rows of wedge-shaped protrusions have left and right opposite side surfaces, and the opposite side surfaces of the two rows of wedge-shaped protrusions are arranged in a V shape. The right side surface of the left side wedge-shaped protrusion constitutes the first positioning surface, and the left side surface of the right side wedge-shaped protrusion constitutes the second positioning surface.

[0085] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions described in the foregoing embodiments without creative labor, or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An auxiliary device for measuring the resistance of carbon nanotubes, characterized in that, The device includes a positioning base with a central positioning surface. This surface contacts the outer circumferential surface of the carbon tube and positions its axis. The positioning base has two sets of contacts spaced apart along the extension of the carbon tube's axis. Each set includes both current and voltage contacts, with the current and voltage contacts in the same set positioned close together and insulated from each other. Both contacts have a contact end for abutting the carbon tube and an external end for connecting to an external measurement circuit. The positioning base also has an axial positioning structure that engages with the end of the carbon tube to define its axial position. One set of contacts is positioned close to the axial positioning structure. During measurement, the current and voltage contacts are fixed to the positioning base. After the carbon tube is pressed and positioned on the positioning base, the two sets of contacts contact the outer circumferential surface of the carbon tube. The two current contacts and two voltage contacts are used to connect the current measurement circuit and the voltage measurement circuit, respectively, to achieve carbon tube resistance measurement based on the Kelvin four-wire measurement principle.

2. The auxiliary device for measuring the resistance of carbon nanotubes according to claim 1, characterized in that, The axial positioning surface includes a first positioning surface and a second positioning surface. The first positioning surface and the second positioning surface are arranged opposite each other in a V-shape. The axial positioning surface is used to tangentially fit with the outer peripheral surface of the carbon tube.

3. The auxiliary device for measuring the resistance of carbon nanotubes according to claim 2, characterized in that, The positioning seat is a V-shaped block, and the V-shaped groove of the positioning seat forms a V-shaped positioning groove. The two opposite groove walls of the V-shaped groove respectively form the first positioning surface and the second positioning surface.

4. The auxiliary device for measuring the resistance of carbon nanotubes according to claim 3, characterized in that, The positioning seat has a baffle at one end of its V-shaped positioning groove, and the baffle forms an axial positioning structure.

5. The auxiliary device for measuring the resistance of carbon nanotubes according to claim 3, characterized in that, Two sets of contacts are set at the bottom of the V-shaped positioning groove. The bottom of the V-shaped positioning groove is provided with contact holes for fixing each current contact and voltage contact. The current contact and voltage contact extend in a straight line. The current contact and voltage contact have an inner end protruding from the bottom of the V-shaped positioning groove and an outer end protruding from the side of the positioning seat facing away from the V-shaped positioning groove. The inner end forms an abutment end, and the outer end forms an external connection end.

6. The auxiliary device for measuring the resistance of carbon nanotubes according to claim 5, characterized in that, The bottom of the V-shaped positioning groove is a flat groove bottom, and two sets of contact points are set on the flat groove bottom.

7. The auxiliary device for measuring the resistance of carbon nanotubes according to any one of claims 3-6, characterized in that, The current and voltage contacts of each group of contacts are arranged side by side and close together in the width direction of the V-shaped positioning groove.

8. The auxiliary device for measuring the resistance of carbon nanotubes according to any one of claims 3-6, characterized in that, The carbon tube resistance measurement auxiliary device also includes a clamping seat, which cooperates with the positioning seat to press the carbon tube onto the axial positioning surface to ensure positioning contact between the carbon tube and the axial positioning surface. The clamping seat is a V-shaped block, and the V-shaped groove on the clamping seat forms a V-shaped clamping groove. The two opposite groove walls of the V-shaped clamping groove are used to press the carbon tube to press it onto the V-shaped positioning groove.

9. The auxiliary device for measuring the resistance of carbon nanotubes according to any one of claims 1-6, characterized in that, The carbon tube resistance measurement auxiliary device also includes a clamping seat, which cooperates with the positioning seat to press the carbon tube onto the shaft positioning surface to ensure positioning contact between the carbon tube and the shaft positioning surface.

10. The auxiliary device for measuring the resistance of carbon nanotubes according to any one of claims 1-6, characterized in that, Both the current contact and the voltage contact are spring-loaded pins, with the elastic end of the spring-loaded pin forming the contact end.

11. The auxiliary device for measuring the resistance of carbon nanotubes according to any one of claims 1-6, characterized in that, A set of contacts away from the axial positioning structure is adjustablely mounted on the positioning seat in the direction of extension of the carbon tube axis positioned by the axial positioning surface relative to the axial positioning structure.

12. The auxiliary device for measuring the resistance of carbon nanotubes according to claim 11, characterized in that, A set of contacts, located away from the axial positioning structure, is slidably positioned relative to the positioning seat.

13. The auxiliary device for measuring the resistance of carbon nanotubes according to claim 12, characterized in that, The positioning seat is provided with a guide groove, and a slider is slidably arranged in the guide groove. A set of contacts away from the axial positioning structure is arranged on the slider. The slider slides relative to the positioning seat by sliding in the guide groove. A positioning long groove is provided next to the groove opening of the guide groove facing away from the axial positioning surface. The slider is provided with a retaining edge opposite to the positioning long groove. The retaining edge is provided with a fixing hole. A locking screw is installed in the fixing hole. The locking screw is a self-tapping screw. The retaining edge of the slider is screwed into the positioning long groove and embedded in the groove wall by the self-tapping screw to achieve the slider being pressed and fixed on the positioning seat.

Images