Fiber thermoelectric performance testing device

Abstract

The invention provides a fiber thermoelectric performance testing device. The fiber thermoelectric performance testing device comprises a supporting seat, a movable seat, a driving rod, a nanometer driver and a position follow-up mechanism, the movable seat is located on the side, facing the jacking direction, of the supporting seat, wire supports are fixedly arranged on the surface, facing the jacking direction, of the movable seat and the surface, facing the jacking direction, of the supporting seat correspondingly, and the wire supports are used for supporting the tested fiber and the heating wire and enabling the tested fiber and the heating wire to be kept in the intersecting position relation; the nanometer driver is connected with the driving rod, and the nanometer driver can drive the driving rod to move in the linear direction of the jacking direction; the end, facing the jacking direction, of the driving rod penetrates through the supporting base and abuts against the movable base, and the position follow-up mechanism is connected with the movable base and used for driving the movable base to abut against the driving rod. According to the invention, the contact and separation accuracy of the heating wire and the tested fiber can be effectively ensured.

Description

Technical Field

[0001] The invention relates to the technical field of material performance, and in particular to a fiber thermoelectric performance testing device. Background Art

[0002] Micro-nano fibers, i.e. micron-scale fibers and nano-scale fibers, are widely used in cutting-edge fields such as energy conversion and aerospace, and their thermoelectric properties are one of the research hotspots. Limited by the influence of tiny scale and contact thermal resistance, traditional macro-scale measurement methods are difficult to accurately characterize the thermoelectric properties of micro-nano-scale materials. Therefore, the development of a comprehensive characterization method for the thermoelectric properties of materials at the micro-nano scale is of great significance for the in-depth research and application of micro-nano materials.

[0003] Existing micro-nano fiber thermoelectric performance tests are usually carried out in a cross-structure manner. The cross-structure is developed based on the structure and principle of the 3ω-T method. Its theoretical model and basic principle are similar to the 3ω-T method. The use of the cross-structure to measure the thermal properties of the tested fiber requires two DC and AC heating measurements of the heating wire before and after the tested fiber contacts the heating wire, so as to compare the temperature rise change on the heating wire and analyze the total thermal resistance change brought by the tested fiber and the size of the tested fiber thermal resistance and contact thermal resistance.

[0004] Specifically, the cross-structure measurement principle is as follows: the heating wire and the measured fiber are fixed perpendicularly to each other on a constant temperature heat sink, the heating wire is perpendicular to the external magnetic field, and the measured fiber is parallel to the external magnetic field. The heating wire acts as both a heater and a temperature sensor. Under the action of direct current and magnetic field, an Ampere force will be generated on the heating wire. According to the left-hand rule, this Ampere force is perpendicular to the plane where the two wires are located. By changing the direction of the current or the magnetic field, the Ampere force can be made vertically inward or outward. In this way, the deflection of the heating wire will change under the action of the Ampere force, so that it comes into contact with the measured fiber. After the magnetic field is turned off, the direction of the Ampere force changes, so that the heating wire returns to its original position, and the two wires separate.

[0005] However, since the size of the heating wire is about 20 microns, the magnitude of the magnetic field force needs to be precisely controlled during overlapping, and the mechanical plastic deformation of the heating wire needs to be calculated. In addition, the magnetic field is easily disturbed by the external environment. Therefore, using the magnetic field to achieve overlapping and separation of the measured fiber and the heating wire is unstable, and overlapping and separation often require multiple operations to achieve.

[0006] Therefore, how to accurately control the contact and separation between the heating wire and the fiber being tested in the thermoelectric performance test of micro-nano fibers has become an urgent problem that needs to be solved. Summary of the invention

[0007] To solve the above problems, the fiber thermoelectric performance testing device provided by the present invention can control the moving distance of the fiber under test relative to the heating wire with nanometer or micrometer accuracy by setting a movable seat, a driving rod, and a nano-actuator, thereby effectively ensuring the accuracy of contact and separation between the heating wire and the fiber under test.

[0008] The present invention provides a fiber thermoelectric performance testing device, which includes: a supporting seat, a movable seat, a driving rod, a nano-actuator and a position tracking mechanism;

[0009] The movable seat is located on the side of the support seat facing the lifting direction, and the surface of the movable seat facing the lifting direction and the surface of the support seat facing the lifting direction are both fixedly provided with a wire bracket, and the wire bracket is used to support the measured fiber and the heating wire and keep the measured fiber and the heating wire in an intersecting position relationship;

[0010] The nano-actuator is connected to the driving rod, and the nano-actuator can drive the driving rod to move along the straight line direction where the lifting direction is located;

[0011] One end of the driving rod facing the lifting direction passes through the supporting seat and contacts the movable seat. The position following mechanism is connected with the movable seat, and is used for driving the movable seat to keep contacting with the driving rod.

[0012] Optionally, the driving rod comprises: a rod body, a ball pair and a ball;

[0013] The rod body is connected to a nano-actuator, and the nano-actuator is used to drive the rod body to move in a rotational linear direction along a straight line where the lifting direction is located;

[0014] One end of the rod body facing the lifting direction is fixedly connected with the ball pair, and the ball is embedded in the ball pair and passes through the supporting seat to contact with the movable seat.

[0015] Optionally, the position tracking mechanism includes: a support rod, a compression spring and a limiter;

[0016] The support rod is located on the side of the limiter facing the movable seat, one end of the support rod is fixedly connected to the limiter, the other end of the support rod passes through the support seat and is fixedly connected to the movable seat, and the support rod is slidably connected to the support seat;

[0017] The compression spring is sleeved on the peripheral side of the support rod, and two ends of the compression spring are respectively in conflict with the limiter and the support seat.

[0018] Optionally, there are multiple position tracking mechanisms, and the multiple position tracking mechanisms are arranged around the driving rod.

[0019] Optionally, a groove is provided on the surface of the support seat facing the lifting direction, and the movable seat is located in the groove and is slidably connected to the support seat through the groove.

[0020] Optionally, the wire support for supporting the heating wire is made of conductive material and is insulated and fixedly connected to the movable seat.

[0021] Optionally, the wire support for supporting the fiber to be tested is made of conductive material and is insulated and fixedly connected to the movable seat.

[0022] Optionally, the fiber thermoelectric performance testing device further includes: a reinforcement member;

[0023] The reinforcing piece is fixedly connected to the nano driver, and is used to fix the nano driver on one side of the supporting seat.

[0024] Optionally, the fiber thermoelectric performance testing device further comprises: a cold finger mechanism;

[0025] The reinforcement piece is fitted with the support seat, and the cold finger mechanism is fitted with the reinforcement piece and / or the support seat;

[0026] The cold finger mechanism controls the temperature of the device by bonding it to the device.

[0027] Optionally, the fiber thermoelectric performance testing device further comprises: a vacuum housing;

[0028] The vacuum housing is used to provide a vacuum chamber;

[0029] The supporting seat, the movable seat, the driving rod, the nano-actuator and the position tracking mechanism are all located in the vacuum chamber.

[0030] The fiber thermoelectric performance testing device provided by the embodiment of the present invention, by setting a movable seat, a driving rod, and a nano-actuator, enables the nano-actuator to control the movable seat to reciprocate along the straight line direction where the lifting direction is located through the driving rod with nanometer-level or micrometer-level accuracy, thereby driving the nano-level or micrometer-level to reciprocate along the straight line direction where the lifting direction is located, and then can accurately adjust the moving distance of the measured fiber relative to the heating wire, effectively ensuring the accuracy of contact and separation between the heating wire and the measured fiber. The structure is simple, which not only reduces the cost of the testing device, but also can achieve the contact and separation of the heating wire and the measured fiber without an external variable magnetic field, thereby eliminating a large amount of energy consumption caused by setting a variable magnetic field, making the fiber thermoelectric performance testing device more energy-saving and reducing the cost of testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1This is a schematic partial structural diagram of a fiber thermoelectric performance testing device according to an embodiment of the present application;

[0033] Figure 2 A schematic partial cross-sectional view of a fiber thermoelectric performance testing device according to an embodiment of the present application;

[0034] Figure 3 This is a schematic structural diagram of a driving rod in an embodiment of the present application in a state of cooperating with a nano-actuator;

[0035] Figure 4 This is a schematic structural diagram of a support base according to an embodiment of the present application;

[0036] Figure 5 This is a schematic partial structural diagram of a fiber thermoelectric performance testing device according to an embodiment of the present application;

[0037] Figure 6 This is a schematic structural diagram of a reinforcement member according to an embodiment of the present application.

[0038] Reference numerals:

[0039] 1. Support seat; 11. Through hole; 12. Guide hole; 13. Groove; 2. Movable seat; 21. Threaded hole; 3. Wire bracket; 31. Fixed bracket; 32. Lifting bracket; 4. Driving rod; 41. Rod body; 42. Ball pair; 43. Ball; 51. Nano driver; 52. Cold finger mechanism; 53. Ceramic column; 6. Position tracking mechanism; 61. Support rod; 62. Compression spring; 63. Limiting piece; 7. Reinforcement piece; 71. Clamping hole; 72. Elastic opening; 73. Connecting hole; 8. Vacuum shell; 81. Observation port; 91. Fiber to be tested; 92. Heating wire. DETAILED DESCRIPTION

[0040] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0042] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatially relative terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0043] It should be noted that when an element is referred to as being "fixedly connected" to another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0044] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0045] An embodiment of the present invention provides a fiber thermoelectric performance testing device, which includes: a support seat 1 , a movable seat 2 , a driving rod 4 , a nano-actuator 51 and a position tracking mechanism 6 .

[0046] The movable seat 2 is located on the side of the support seat 1 facing the lifting direction, and the surface of the movable seat 2 facing the lifting direction and the surface of the support seat 1 facing the lifting direction are both fixedly provided with a wire bracket 3, and the wire bracket 3 is used to support the measured fiber 91 and the heating wire 92 and keep the measured fiber 91 and the heating wire 92 in an intersecting positional relationship.

[0047] The nano-actuator 51 is movably connected to the driving rod 4. The nano-actuator 51 can drive the driving rod 4 to move along the straight line direction where the lifting direction is located. One end of the driving rod 4 facing the lifting direction passes through the support seat 1 and contacts the movable seat 2. The position tracking mechanism 6 is connected to the movable seat 2. The position tracking mechanism 6 is used to drive the movable seat 2 to maintain contact with the driving rod 4.

[0048] The tested fiber 91 and the heating wire 92 may be perpendicular to each other, or may be at an angle of 30, 45 or 60 degrees relative to the horizontal plane, but are not limited thereto. In this embodiment, the wire support 3 is used to support the tested fiber 91 and the heating wire 92 and keep the tested fiber 91 and the heating wire 92 in a perpendicular position relationship with each other.

[0049] The fiber thermoelectric performance testing device provided in this embodiment is provided with a movable seat 2, a driving rod 4, and a nano-actuator 51, so that the nano-actuator 51 can control the movable seat 2 to move back and forth along the straight line direction where the lifting direction is located through the driving rod 4 with nanometer-level or micrometer-level accuracy, thereby driving the nano-level or micrometer-level to move back and forth along the straight line direction where the lifting direction is located, and then can accurately adjust the moving distance of the measured fiber 91 relative to the heating wire 92, effectively ensuring the accuracy of contact and separation between the heating wire 92 and the measured fiber 91.

[0050] Among them, the position tracking mechanism 6 can make the distance that the movable seat 2 moves in the straight line direction where the lifting direction is located consistent with the driving rod 4, thereby ensuring that the relative position change of the measured fiber 91 and the heating wire 92 in the straight line direction where the lifting direction is located is consistent with the distance that the nano-actuator 51 drives the driving rod 4 to move, thereby ensuring the accuracy of contact and separation between the heating wire 92 and the measured fiber 91.

[0051] It should be noted that when the wire support 3 on the movable seat 2 is connected to the heating wire 92, the wire support 3 on the support seat 1 is connected to the measured fiber 91; when the wire support 3 on the movable seat 2 is connected to the measured fiber 91, the wire support 3 on the support seat 1 is connected to the heating wire 92. In addition, the measured fiber 91 can be located on the side of the heating wire 92 facing the lifting direction, and the heating wire 92 can also be located on the side of the measured fiber 91 facing the lifting direction.

[0052] Among them, the nanometer level precision is the precision range of 1 nanometer to 100 nanometers, and the micrometer level precision is the precision range of 1 micrometer to 100 micrometers.

[0053] In this embodiment, the lifting direction is upward; at the same time, in this embodiment, the wire bracket 3 installed on the support seat 1 is called a fixed bracket 31, and the wire bracket 3 installed on the movable seat 2 is called a lifting bracket 32; wherein, the two ends of the heating wire 92 are respectively wound on two fixed brackets 31 arranged along the left and right directions, and the two ends of the measured fiber 91 are respectively wound on two lifting brackets 32 arranged along the front and back directions, and the heating wire 92 is located above the measured fiber 91.

[0054] Furthermore, the materials of the support seat 1 and the movable seat 2 are both metal materials, but are not limited thereto. Among them, the fixed bracket 31 is a conductive material and is insulated and fixedly connected to the movable seat 2. The lifting bracket 32 ​​can be a conductive material or an insulating material. When the lifting bracket 32 ​​is an insulating material, the fiber thermoelectric performance testing device can test the thermal conductivity performance of the tested fiber 91; when the lifting bracket 32 ​​is a conductive material, the fiber thermoelectric performance testing device can test the thermal conductivity, thermal diffusivity, heat absorption coefficient and Seebeck coefficient of the tested fiber 91.

[0055] Among them, the insulated fixed connection methods of the wire bracket 3 include at least the following two methods. The first method is to sleeve the end of the wire bracket 3 with an insulating sleeve and insert the insulating sleeve into the corresponding mounting hole on the movable seat 2 or the support seat 1 to fix the wire bracket 3 on the movable seat 2 or the support seat 1; the second method is to bond the end of the wire bracket 3 with an insulating pad or an insulating column, and the insulating pad is bonded to the movable seat 2 or the support seat 1. The materials of the insulating sleeve and the insulating pad are thermally conductive insulating materials, such as ceramics, gypsum, etc.

[0056] In this embodiment, combined with Figure 1 and Figure 2 , the lifting bracket 32 ​​is made of conductive material and is insulated and fixedly connected to the movable seat 2; the lifting bracket 32 ​​and the fixed bracket 31 are both n-type structures; two hollow ceramic columns 53 are fixedly provided at the front and rear ends of the movable seat 2, and the ceramic columns 53 on the movable seat 2 penetrate the movable seat 2 and are respectively located at the front and rear sides of the support seat 1, the bottom end of the lifting bracket 32 ​​is inserted into the ceramic column 53 and extends out of the ceramic column 53, so as to be fixedly connected to the movable seat 2 through the ceramic column 53; the support seat 1 is also fixedly provided with two hollow ceramic columns 53 on the left and right sides of the movable seat 2, respectively, and the ceramic columns 53 on the support seat 1 penetrate the support seat 1, the bottom end of the fixed bracket 31 is inserted into the ceramic column 53 and extends out of the ceramic column 53, so as to be fixedly connected to the support seat 1 through the ceramic column 53, wherein the bottom ends of the fixed bracket 31 and the movable bracket extending from the corresponding ceramic columns 53 are both used to connect corresponding circuits, and this embodiment does not make specific limitations on this.

[0057] Combination Figure 1 , Figure 2 and Figure 3The driving rod 4 includes: a rod body 41, a ball pair 42 and a ball 43. A through hole 11 is provided on the support seat 1. The rod body 41 is connected to a nano-actuator 51, which is used to drive the rod body 41 to rotate and move linearly along the straight line direction where the lifting direction is located, that is, to drive the rod body 41 to rotate along the straight line direction where the lifting direction is located and to drive the rod body 41 to move linearly along the straight line direction where the lifting direction is located. The top end of the rod body 41 is fixedly connected to the ball pair 42, and the ball 43 is embedded in the ball pair 42 and passes through the support seat 1 through the through hole 11 to contact the movable seat 2.

[0058] In this embodiment, the nano-actuator 51 is a nano-progressive motor, the rod body 41 is a lead screw, and the ball 43 is a steel ball; the lower surface of the movable seat 2 is provided with an arc groove (not shown in the figure), which matches the ball 43; the nano-progressive motor drives the lead screw to rotate relative to the vertical direction and move linearly in the vertical direction through the ball 43, which will not be described in detail in this embodiment. Among them, the displacement accuracy of the nano-actuator 51 is 10nm, the movement range is 0mm to 3mm, and it can work normally in a temperature of 80K to 500K and a vacuum environment of 10-7mbar.

[0059] The position tracking mechanism 6 uses an elastic compression member to drive the bottom surface of the movable seat 2 to always contact the top end of the driving rod 4. The elastic compression member can be arranged above the movable seat 2, and the top end of the elastic compression member is fixed, and the bottom end of the elastic compression member contacts the movable seat 2. The elastic compression member applies downward pressure to the movable seat 2, so that the movable seat 2 always keeps in contact with the ball 43 whether it moves upward or downward; in addition, the elastic compression member can also be arranged below the movable seat 2, and the elastic compression member applies downward pulling force to the movable seat 2, so that the movable seat 2 always keeps in contact with the ball 43 whether it moves upward or downward.

[0060] In this embodiment, combined with Figure 1 , Figure 2 and Figure 4 The support seat 1 is provided with a guide hole 12, and the movable seat 2 is provided with a threaded hole 21. The position tracking mechanism 6 includes: a support rod 61, a compression spring 62 and a stopper 63. The central axis of the guide hole 12 coincides with the central axis of the threaded hole 21; the stopper 63 is a pancake-shaped structure, and the diameter of the stopper 63 in the horizontal direction is larger than that of the support rod 61.

[0061] The support rod 61 is located on the side of the limiter 63 facing the movable seat 2. One end of the support rod 61 is fixedly connected to the limiter 63 coaxially. The other end of the support rod 61 passes through the support seat 1 through the guide hole 12 and is threadedly connected to the movable seat 2 through the threaded hole 21. The support rod 61 is also slidably connected to the support seat 1 through the guide hole 12. The compression spring 62 is sleeved on the circumferential side of the support rod 61, and the two ends of the compression spring 62 are respectively in conflict with the limiter 63 and the support seat 1.

[0062] The support rod 61 and the stopper 63 can be replaced by screws; the number of position tracking mechanisms 6 is multiple, and the multiple position tracking mechanisms 6 are arranged at equal intervals around the driving rod 4. In this embodiment, the number of position tracking mechanisms 6 is three, and the number of threaded holes 21 and guide holes 12 is also three. Taking three threaded holes 21 as an example, adjacent threaded holes 21 are arranged at an angle of 120 degrees.

[0063] The position tracking mechanism 6 provided in this embodiment is not only simple in structure and stable, but also ensures the accuracy of contact and separation between the heating wire 92 and the measured fiber 91. At the same time, by arranging the position tracking mechanism 6 below the movable seat 2, a larger space can be provided for the installation of the measured fiber 91 and the heating wire 92, and it is convenient to observe the contact and separation state of the heating wire 92 and the measured fiber 91.

[0064] Combination Figure 1 and Figure 4 A groove 13 is formed on the surface of the support seat 1 facing the lifting direction. The guide hole 12 is connected to the groove 13. The movable seat 2 is located in the groove 13 and is slidably connected to the support seat 1 through the groove 13. It should be noted that the top of the support seat 1 can be located in the groove 13 or extend out of the groove 13.

[0065] In this embodiment, the depth of the groove 13 is greater than the thickness of the movable seat 2. After the movable seat 2 is installed on the groove 13 and the driving rod 4, the nano-actuator 51 and the position tracking mechanism 6 are installed, the movable seat 2 is in a natural state, at which time the upper surface of the movable seat 2 is flush with the upper surface of the support seat 1, and there is a gap between the lower surface of the movable seat 2 and the support seat 1. This ensures that the movable seat 2 can move within a certain range up and down.

[0066] The groove 13 is provided to facilitate the installation of the movable seat 2 and to improve the space utilization of the fiber thermoelectric performance testing device and reduce the volume of the fiber thermoelectric performance testing device.

[0067] Further, combined with Figure 1 and Figure 5 The fiber thermoelectric performance testing device also includes: a cold finger mechanism 52, a reinforcement member 7 and a vacuum housing 8.

[0068] The reinforcement 7 is fixedly connected to the nano-actuator 51. The reinforcement 7 is used to fix the nano-actuator 51 on one side of the support seat 1. The vacuum housing 8 is used to provide a vacuum chamber. The reinforcement, the support seat 1, the movable seat 2, the driving rod 4, the nano-actuator 51 and the position tracking mechanism 6 are all located in the vacuum chamber. The cold finger mechanism 52 is attached to the reinforcement 7 and / or the support seat 1. The cold finger mechanism 52 is attached to the device to control the temperature of the device.

[0069] The reinforcement 7 can be directly fixedly connected to the cold finger mechanism 52 or directly fixedly connected to the support base 1 , and then the support base 1 is directly fixedly connected to the cold finger mechanism 52 or the vacuum shell 8 , or the reinforcement 7 is directly fixedly connected to the vacuum shell 8 .

[0070] In this embodiment, combined with Figure 1 and Figure 6 , the reinforcement 7 is a clamp; the movable seat 2 is a hexahedral structure, and the support seat 1 and the reinforcement 7 are in an L-shaped structure. The horizontal portion of the support seat 1 is connected to the movable seat 2 and the position tracking mechanism 6, and the vertical portion of the support seat 1 is fixedly connected to the cold finger mechanism 52 and the reinforcement 7; the vertical portion of the support seat 1 is located at the lower right of the horizontal portion of the support seat 1, the vertical portion of the reinforcement 7 is located at the lower right of the horizontal portion of the reinforcement 7, the horizontal portion of the reinforcement 7 is located below the stopper 63, and the vertical portion of the reinforcement 7 is located on the left side of the vertical portion of the support seat 1 and fits with the vertical portion of the support portion.

[0071] The horizontal part of the reinforcement 7 is provided with a clamping hole 71 and a tightening opening 72. One end of the tightening opening 72 is connected to the clamping hole 71, and the other end is connected to the left end surface of the reinforcement 7. The left end of the reinforcement 7 is provided with a connecting hole 73 and is provided with a screw and a nut. The part of the shell of the nano-actuator 51 covering the peripheral side of the driving rod 4 passes through the reinforcement 7 through the clamping hole 71.

[0072] The connecting hole 73 passes through the horizontal part of the reinforcement 7 in the front-to-back direction and is connected to the tightening opening 72. One end of the screw passes through the reinforcement 7 through the connecting hole 73 and is threadedly connected to the nut on the front side of the reinforcement 7. By adjusting the relative position of the nut and the head on the screw, the degree of tightening of the reinforcement 7 on the nano-actuator 51 can be changed, so that the installation and removal of the nano-actuator 51 can be achieved. One end of the cold finger mechanism 52 passes through the vacuum shell 8 and fits with the vertical part of the support seat 1, and is sealed with the vacuum shell 8. The vertical part of the reinforcement 7 and the vertical part of the support seat 1 are fixedly connected to the cold finger mechanism 52 by screws.

[0073] In this embodiment, the materials of the reinforcement 7, the movable seat 2, the support seat 1 and the support rod 61 are all copper, which can stabilize the overall temperature of the fiber thermoelectric performance testing device, thereby ensuring the temperature stability of the tested fiber 91 and further improving the accuracy of the test.

[0074] Furthermore, an observation port 81 is provided at the top of the vacuum shell 8, and a transparent plate is provided at the observation port 81, and the transparent plate is sealed and connected to the vacuum shell 8, and the vacuum shell 8 seals the observation port 81 through the transparent plate. The observation port 81 can be provided to facilitate the operator to observe whether one of the tested fiber 91 and the heating wire 92 is disconnected. In particular, when the operator cannot measure the experimental data, the observation port 81 can be used to quickly determine whether there is a disconnection problem between the tested fiber 91 and the heating wire 92. The transparent plate can ensure that the vacuum chamber is in a vacuum-tight environment, effectively avoiding the influence of external impurities on the test.

[0075] In an optional embodiment, the transparent plate is a magnifying glass, which facilitates the operator to observe the status of the tested fiber 91 and the heating wire 92.

[0076] The working principle of the fiber thermoelectric performance testing device provided in this embodiment is as follows:

[0077] When the nano-stepping motor drives the rod body 41 to extend upward by a certain length, the ball 43 at the top of the rod body 41 pushes the movable seat 2 to move upward by the same distance. At this time, since the support rod 61 is fixed to the movable seat 2 by threads, the support rod 61 will move the same distance with the movable seat 2, and at the same time, the distance between the limiter 63 and the lower surface of the horizontal part of the support seat 1 is also reduced by the same distance, and the compression spring 62 is also compressed by the same length. In this process, the movable seat 2 gradually approaches the heating wire 92 with the measured fiber 91 until the measured fiber 91 and the heating wire 92 are overlapped.

[0078] When the nano-stepping motor rotates in the opposite direction to drive the rod body 41 to rotate downward, the ball 43 at the top of the rod body 41 will follow the rod body 41 to move downward by the same distance. At this time, due to the elastic effect of the compression spring 62, the movable seat 2 follows the ball 43 to move downward by the same distance, so that the movable seat 2 gradually moves away from the heating wire 92 with the measured fiber 91, thereby separating the heating wire 92 from the measured fiber 91. At the same time, the support rod 61 will also follow the movable seat 2 to move downward by the same distance, and the compression spring 62 will return to the initial compression state, so that the measured fiber 91 can overlap with the heating wire 92 again next time.

[0079] The fiber thermoelectric performance testing device provided in this embodiment has a simple and compact structure and high space utilization, which effectively reduces the volume of the fiber thermoelectric performance testing device. At the same time, the fiber thermoelectric performance testing device mechanically controls the overlap and separation of the tested fiber 91 and the heating wire 92 without using a magnetic field to control the positional relationship between the tested fiber 91 and the heating wire 92. This not only can accurately control the overlap and separation of the tested fiber 91 and the heating wire 92, but also reduces the production cost of the fiber thermoelectric performance testing device. At the same time, there is no need to apply an external variable magnetic field, thereby eliminating a large amount of energy consumption caused by setting a variable magnetic field, making the fiber thermoelectric performance testing device more energy-saving and reducing the cost of testing.

[0080] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0081] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A fiber thermoelectric performance testing device, characterized in that: The fiber thermoelectric performance testing device comprises: a support seat (1), a movable seat (2), a driving rod (4), a nano-actuator (51) and a position tracking mechanism (6); The movable seat (2) is located on a side of the support seat (1) facing the lifting direction, and a wire support (3) is fixedly provided on the surface of the movable seat (2) facing the lifting direction and the surface of the support seat (1) facing the lifting direction, and the wire support (3) is used to support the measured fiber (91) and the heating wire (92) and keep the measured fiber (91) and the heating wire (92) in an intersecting position relationship; The nano-actuator (51) is connected to the driving rod (4), and the nano-actuator (51) can drive the driving rod (4) to move along a straight line direction where the lifting direction is located; One end of the driving rod (4) facing the lifting direction passes through the supporting seat (1) and contacts the movable seat (2); the position following mechanism (6) is connected to the movable seat (2); the position following mechanism (6) is used to drive the movable seat (2) to maintain contact with the driving rod (4).

2. The fiber thermoelectric performance testing device according to claim 1, characterized in that: The driving rod (4) comprises: a rod body (41), a ball pair (42) and a ball (43); The rod body (41) is connected to the nanometer driver (51), and the nanometer driver (51) is used to drive the rod body (41) to move in a rotational linear direction along the linear direction where the lifting direction is located; One end of the rod body (41) facing the lifting direction is fixedly connected to the ball pair (42), and the ball (43) is embedded in the ball pair (42) and passes through the support seat (1) to contact the movable seat (2).

3. The fiber thermoelectric performance testing device according to claim 1, characterized in that: The position tracking mechanism (6) comprises: a support rod (61), a compression spring (62) and a limiting member (63); The support rod (61) is located on a side of the limiting member (63) facing the movable seat (2), one end of the support rod (61) is fixedly connected to the limiting member (63), the other end of the support rod (61) passes through the support seat (1) and is fixedly connected to the movable seat (2), and the support rod (61) is slidably connected to the support seat (1); The compression spring (62) is sleeved on the circumferential side of the support rod (61), and two ends of the compression spring (62) are respectively in contact with the limiting member (63) and the support seat (1).

4. The fiber thermoelectric performance testing device according to claim 1, characterized in that: The number of the position tracking mechanisms (6) is multiple, and the multiple position tracking mechanisms (6) are arranged around the driving rod (4).

5. The fiber thermoelectric performance testing device according to claim 1, characterized in that: A groove (13) is provided on the surface of the support seat (1) facing the lifting direction, and the movable seat (2) is located in the groove (13) and is slidably connected to the support seat (1) via the groove (13).

6. The fiber thermoelectric performance testing device according to claim 1, characterized in that: The wire support (3) used for supporting the heating wire (92) is made of conductive material and is insulated and fixedly connected to the movable seat (2).

7. The fiber thermoelectric performance testing device according to claim 1, characterized in that: The wire support (3) used for supporting the measured fiber (91) is made of conductive material and is insulated and fixedly connected to the movable seat (2).

8. The fiber thermoelectric performance testing device according to claim 1, characterized in that: The fiber thermoelectric performance testing device further comprises: a reinforcement member (7); The reinforcing member (7) is fixedly connected to the nano-driver (51), and the reinforcing member (7) is used to fix the nano-driver (51) on one side of the support base (1).

9. The fiber thermoelectric performance testing device according to claim 8, characterized in that: The fiber thermoelectric performance testing device further comprises: a cold finger mechanism (52); The reinforcing member (7) is in close contact with the supporting seat (1), and the cold finger mechanism (52) is in close contact with the reinforcing member (7) and / or the supporting seat (1); The cold finger mechanism (52) is attached to the device to control the temperature of the device.

10. The fiber thermoelectric performance testing device according to any one of claims 1 to 9, characterized in that: The fiber thermoelectric performance testing device further comprises: a vacuum housing (8); The vacuum housing (8) is used to provide a vacuum chamber; The support seat (1), the movable seat (2), the driving rod (4), the nano-actuator (51) and the position tracking mechanism (6) are all located in the vacuum chamber.

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