Fiber Thermoelectric Performance Testing Device

Abstract

The present invention provides a fiber thermoelectric performance testing device, which includes: a support base, a movable base, a driving rod, a nano driver, and a position tracking mechanism; the movable base is located on one side of the support base facing the jacking direction, and wire brackets are fixedly arranged on the surface of the movable base facing the jacking direction and the surface of the support base facing the jacking direction. The wire brackets are used to support the fiber to be measured and the heating wire and keep the fiber to be measured and the heating wire in an intersecting positional relationship; the nano driver is connected to the driving rod, and the nano driver can drive the driving rod to move along the straight line direction where the jacking direction is located; one end of the driving rod facing the jacking direction passes through the support base and abuts against the movable base, and the position tracking mechanism is connected to the movable base, and the position tracking mechanism is used to drive the movable base to keep abutting against the driving rod. The present invention can effectively ensure the accuracy of the contact and separation between the heating wire and the fiber to be measured.

Description

Technical Field

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

[0002] Micro-nano fibers, namely 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 micro scale and contact thermal resistance, etc., traditional macroscopic measurement methods are difficult to accurately characterize the thermoelectric properties of micro-nano scale materials. Therefore, developing a comprehensive characterization method for the thermoelectric properties of materials applicable to the micro-nano scale is of great significance for the in-depth research and application of micro-nano materials.

[0003] The existing testing of the thermoelectric properties of micro-nano fibers is usually carried out in a cross structure. 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 those of the 3ω-T method. Measuring the thermal properties of the fiber under test using the cross structure requires respectively performing DC and AC power-on heating measurements on the heating wire twice before and after the fiber under test contacts the heating wire, in order to compare the temperature rise changes on the heating wire, analyze the total thermal resistance change brought by the fiber under test, and the respective magnitudes of the thermal resistance of the fiber under test and the contact thermal resistance.

[0004] Specifically, the measurement principle of the cross structure is as follows: The heating wire and the fiber under test are perpendicularly fixed on a constant-temperature heat sink. The heating wire is perpendicular to the external magnetic field, while the fiber under test is parallel to the external magnetic field. The heating wire serves as both a heater and a temperature sensor. Under the action of a DC current and a 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 current direction or the magnetic field direction, the Ampere force can be made perpendicular inward or outward. Thus, under the action of the Ampere force, the deflection of the heating wire will change, causing contact between it and the fiber under test. After the magnetic field is turned off, the direction of the Ampere force changes, causing the heating wire to return to its original position and the two wires to separate.

[0005] However, since the size of the heating wire is about 20 microns, when lapping, it is necessary to precisely control the magnitude of the magnetic field force, and it is necessary to calculate the mechanical plastic deformation of the heating wire. Moreover, the magnetic field is easily interfered by the external environment. Therefore, using the magnetic field to achieve the lapping and separation of the fiber under test and the heating wire is unstable, and often multiple operations are required to achieve lapping and separation.

[0006] Therefore, how to accurately control the contact and separation of the heating wire and the fiber under test in the testing of the thermoelectric properties of micro-nano fibers has become an urgent problem to be solved at present. 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 to be measured relative to the heating wire with nanometer or micrometer precision by setting an active seat, a driving rod, and a nano-driver, thereby effectively ensuring the accuracy of the contact and separation between the heating wire and the fiber to be measured.

[0008] The present invention provides a fiber thermoelectric performance testing device, which includes: a support seat, an active seat, a driving rod, a nano-driver, and a position tracking mechanism;

[0009] The active seat is located on one side of the support seat facing the jacking direction. Wire holders are fixedly arranged on the surface of the active seat facing the jacking direction and the surface of the support seat facing the jacking direction. The wire holders are used to support the fiber to be measured and the heating wire and keep the fiber to be measured and the heating wire in an intersecting positional relationship;

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

[0011] One end of the driving rod facing the jacking direction passes through the support seat and abuts against the active seat. The position tracking mechanism is connected to the active seat, and the position tracking mechanism is used to drive the active seat to keep abutting against the driving rod.

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

[0013] The rod body is connected to the nano-driver, and the nano-driver is used to drive the rod body to perform a rotary linear movement along the straight line direction where the jacking direction is located;

[0014] One end of the rod body facing the jacking direction is fixedly connected to the ball pair, and the ball is embedded in the ball pair and passes through the support seat to abut against the active seat.

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

[0016] The support rod is located on one side of the limiting member facing the active seat. One end of the support rod is fixedly connected to the limiting member, and the other end of the support rod passes through the support seat and is fixedly connected to the active seat. The support rod is slidably connected to the support seat;

[0017] The compression spring is sleeved on the circumference of the support rod, and both ends of the compression spring abut against the limiting member and the support seat respectively.

[0018] Optionally, the number of the position tracking mechanisms is multiple, and the multiple position tracking mechanisms are arranged on the circumference of the driving rod.

[0019] Optionally, a groove is formed on the surface of the support seat facing the jacking direction, and the active 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 a conductive material and is fixedly connected to the movable seat in an insulated manner.

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

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

[0023] The reinforcement member is fixedly connected to the nano-driver, and the reinforcement member is used to fix the nano-driver on one side of the support seat.

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

[0025] The reinforcement member is in contact with the support seat, and the cold finger mechanism is in contact with the reinforcement member and / or the support seat;

[0026] The cold finger mechanism controls the temperature of the device by being in contact with the device.

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

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

[0029] The support seat, the movable seat, the drive rod, the nano-driver and the position tracking mechanism are all located in the vacuum chamber.

[0030] The fiber thermoelectric property testing device provided by the embodiment of the present invention, by setting the movable seat, the drive rod, and the nano-driver, enables the nano-driver to control the movable seat to reciprocate along the straight line direction of the jacking direction with nanometer or micrometer precision through the drive rod, thereby driving the nanometer or micrometer to reciprocate along the straight line direction of the jacking direction, and further being able to accurately adjust the moving distance of the fiber to be measured relative to the heating wire, effectively ensuring the accuracy of the contact and separation between the heating wire and the fiber to be measured. The structure is simple, which not only reduces the cost of the testing device, but also realizes the contact and separation between the heating wire and the fiber to be measured without an externally applied variable magnetic field, thus saving a large amount of energy consumption caused by setting the variable magnetic field, making the fiber thermoelectric property testing device more energy-saving and reducing the cost of the test. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

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

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

[0034] Figure 3 Schematic structural diagram of a driving rod in a state of cooperation with a nano-driver according to an embodiment of the present application;

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

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

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

[0038] Reference numerals:

[0039] 1, support base; 11, through hole; 12, guide hole; 13, groove; 2, movable seat; 21, threaded hole; 3, wire support; 31, fixed support; 32, lifting support; 4, driving rod; 41, rod body; 42, ball pair; 43, ball; 51, nano-driver; 52, cold finger mechanism; 53, ceramic column; 6, position following mechanism; 61, support rod; 62, compression spring; 63, limiting member; 7, reinforcement member; 71, clamping hole; 72, tightening opening; 73, communication hole; 8, vacuum housing; 81, observation port; 91, fiber to be measured; 92, heating wire. Detailed implementation manners

[0040] To facilitate understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are shown 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, these embodiments are provided 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 commonly understood by those of ordinary skill in the technical field to which the present application belongs. The terms used in the specification of the present application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0042] Spatial relationship terms such as "under", "below", "beneath", "underneath", "above", "upper", etc. can be used herein to describe the relationship of one element or feature shown in the figure with other elements or features. It should be understood that, in addition to the orientations shown in the figure, spatial relationship terms also include different orientations of the device during use and operation. For example, if the device in the attached drawing is flipped, an element or feature described as "under other elements" or "beneath them" or "under it" will be oriented "above" the other elements or features. Therefore, the exemplary terms "under" and "beneath" can include both the upper and lower orientations. In addition, the device may also have other orientations (such as rotating 90 degrees or other orientations), and the spatial descriptors used herein are accordingly interpreted.

[0043] It should be noted that when an element is referred to as "fixedly connected" to another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate 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] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprise / include" or "have" and the like specify the presence of the stated features, wholes, steps, operations, components, parts or combinations thereof, but do not preclude 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, and the fiber thermoelectric performance testing device includes: a support base 1, a movable base 2, a driving rod 4, a nano-driver 51 and a position tracking mechanism 6.

[0046] The movable base 2 is located on one side of the support base 1 facing the jacking direction. Wire brackets 3 are fixedly arranged on the surfaces of the movable base 2 and the support base 1 facing the jacking direction. The wire brackets 3 are used to support the fiber to be measured 91 and the heating wire 92 and keep the fiber to be measured 91 and the heating wire 92 in an intersecting positional relationship.

[0047] The nano-driver 51 is movably connected to the driving rod 4. The nano-driver 51 can drive the driving rod 4 to move along the straight line direction of the jacking direction. One end of the driving rod 4 facing the jacking direction passes through the support base 1 and abuts against 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 keep abutting against the driving rod 4.

[0048] Wherein, the fiber to be measured 91 and the heating wire 92 can be perpendicular to each other, or form an angle of 30 degrees, 45 degrees or 60 degrees with respect to the horizontal plane, but not limited thereto. In this embodiment, the wire support 3 is used to support the fiber to be measured 91 and the heating wire 92 and keep the fiber to be measured 91 and the heating wire 92 in a perpendicular positional relationship with each other.

[0049] The fiber thermoelectric property testing device provided in this embodiment, by setting the movable seat 2, the driving rod 4, and the nano-driver 51, enables the nano-driver 51 to control the reciprocating movement of the movable seat 2 along the straight line direction of the jacking direction with nano-level or micron-level precision through the driving rod 4, so as to drive the reciprocating movement of the nano-level or micron-level along the straight line direction of the jacking direction, and further can accurately adjust the moving distance of the fiber to be measured 91 relative to the heating wire 92, effectively ensuring the accuracy of the contact and separation between the heating wire 92 and the fiber to be measured 91.

[0050] Wherein, the position tracking mechanism 6 can make the moving distance of the movable seat 2 in the straight line direction of the jacking direction consistent with that of the driving rod 4, so as to ensure that the relative position change of the fiber to be measured 91 and the heating wire 92 in the straight line direction of the jacking direction is consistent with the moving distance of the nano-driver 51 driving the driving rod 4, and further ensure the accuracy of the contact and separation between the heating wire 92 and the fiber to be measured 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 base 1 is connected to the fiber to be measured 91; when the wire support 3 on the movable seat 2 is connected to the fiber to be measured 91, the wire support 3 on the support base 1 is connected to the heating wire 92. In addition, the fiber to be measured 91 can be located on one side of the heating wire 92 facing the jacking direction, and the heating wire 92 can also be located on one side of the fiber to be measured 91 facing the jacking direction.

[0052] Wherein, the nano-level precision is in the precision range of 1 nanometer to 100 nanometers, and the micron-level precision is in the precision range of 1 micron to 100 microns.

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

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

[0055] Among them, the insulating fixed connection methods of the wire bracket 3 include at least the following two. The first is that the end of the wire bracket 3 is sleeved with an insulating sleeve and inserted into the corresponding mounting hole on the movable seat 2 or the support base 1 through the insulating sleeve to fix the wire bracket 3 on the movable seat 2 or the support base 1; the second is that the end of the wire bracket 3 is bonded with an insulating pad or insulating column, and the insulating pad is bonded to the movable seat 2 or the support base 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, in combination with Figure 1 and Figure 2 , the lifting bracket 32 is made of conductive material and is fixedly connected to the movable seat 2 in an insulating manner; both the lifting bracket 32 and the fixed bracket 31 are of n-type structure; two hollow ceramic columns 53 are fixedly arranged at both the front and rear ends of the movable seat 2, and the ceramic columns 53 on the movable seat 2 penetrate through the movable seat 2 and are respectively located on the front and rear sides of the support base 1. The bottom end of the lifting bracket 32 is inserted into the ceramic column 53 and extends out of the ceramic column 53 to be fixedly connected to the movable seat 2 through the ceramic column 53; two hollow ceramic columns 53 are also fixedly arranged on both the left and right sides of the support base 1 with respect to the movable seat 2, and the ceramic columns 53 on the support base 1 penetrate through the support base 1. The bottom end of the fixed bracket 31 is inserted into the ceramic column 53 and extends out of the ceramic column 53 to be fixedly connected to the support base 1 through the ceramic column 53. Among them, the bottom ends of the fixed bracket 31 and the movable bracket extending out of the corresponding ceramic column 53 are both used to connect the corresponding circuits, and this embodiment does not make specific limitations on this.

[0057] In combination with Figure 1 , Figure 2 and Figure 3, the 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 base 1. The rod body 41 is connected to the nano-driver 51, and the nano-driver 51 is used to drive the rod body 41 to perform a rotary linear movement along the straight line direction of the jacking direction, that is, while driving the rod body 41 to rotate along the straight line direction of the jacking direction, the rod body 41 is driven to perform a linear movement along the straight line direction of the jacking direction. 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 base 1 through the through hole 11 and abuts against the movable seat 2.

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

[0059] The position following mechanism 6 uses an elastic compression member to drive the bottom surface of the movable seat 2 to always abut against the top end of the driving rod 4. Among them, 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 abuts against the movable seat 2. The elastic compression member applies a downward pressure to the movable seat 2, so that the movable seat 2 always remains 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 a downward pulling force to the movable seat 2, so that the movable seat 2 always remains in contact with the ball 43 whether it moves upward or downward.

[0060] In this embodiment, in combination with Figure 1 , Figure 2 and Figure 4 , a guiding hole 12 is provided on the support base 1, and a threaded hole 21 is provided on the movable seat 2. The position following mechanism 6 includes: a support rod 61, a compression spring 62, and a limiting member 63. The central axis of the guiding hole 12 coincides with the central axis of the threaded hole 21; the limiting member 63 is in a disc shape, and the diameter of the limiting member 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 limiting member 63 facing the movable seat 2. One end of the support rod 61 is fixedly connected to the limiting member 63 coaxially. The other end of the support rod 61 passes through the support seat 1 through the guiding 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 guiding hole 12. The compression spring 62 is sleeved on the circumferential side of the support rod 61, and both ends of the compression spring 62 abut against the limiting member 63 and the support seat 1 respectively.

[0062] Wherein, the support rod 61 and the limiting member 63 can be replaced by screws; the number of the position following mechanisms 6 is multiple, and the multiple position following mechanisms 6 are arranged at equal intervals on the circumferential side of the driving rod 4. In this embodiment, the number of the position following mechanisms 6 is three, and the number of the same threaded holes 21 and guiding holes 12 is also three. Taking the three threaded holes 21 as an example, the adjacent threaded holes 21 are arranged at an included angle of 120 degrees.

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

[0064] Combined with Figure 1 and Figure 4 , a groove 13 is formed on the surface of the support seat 1 facing the jacking direction. The guiding hole 12 communicates with 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 can 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 driver 51 and the position following mechanism 6 are installed, when the movable seat 2 is in a natural state, at this 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. In this way, it can be ensured that the movable seat 2 can move within a certain range up and down.

[0066] By arranging the groove 13, not only the installation of the movable seat 2 can be facilitated, but also the space utilization rate of the fiber thermoelectric performance testing device can be improved, and the volume of the fiber thermoelectric performance testing device can be reduced.

[0067] Furthermore, combined with Figure 1 and Figure 5 , the fiber thermoelectric performance testing device further includes: a cold finger mechanism 52, a reinforcing member 7 and a vacuum housing 8.

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

[0069] Among them, the reinforcement member 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 housing 8, or the reinforcement member 7 is directly fixedly connected to the vacuum housing 8.

[0070] In this embodiment, in combination with Figure 1 and Figure 6 , the reinforcement member 7 is a clamp; the movable seat 2 is a hexahedron structure, and the support base 1 and the reinforcement member 7 are in an L-shaped structure. Among them, the horizontal part of the support base 1 is connected to the movable seat 2 and the position tracking mechanism 6, and the vertical part of the support base 1 is fixedly connected to the cold finger mechanism 52 and the reinforcement member 7; the vertical part of the support base 1 is located at the lower right of the horizontal part of the support base 1, the vertical part of the reinforcement member 7 is located at the lower right of the horizontal part of the reinforcement member 7, the horizontal part of the reinforcement member 7 is located below the limiting member 63, and the vertical part of the reinforcement member 7 is located on the left side of the vertical part of the support base 1 and is in contact with the vertical part of the support part.

[0071] The horizontal part of the reinforcement member 7 is provided with a clamping hole 71 and a tightening opening 72. One end of the tightening opening 72 is communicated with the clamping hole 71, and the other end is communicated with the left end face of the reinforcement member 7. A communication hole 73 is provided at the left end of the reinforcement member 7 and is provided with a screw and a nut. The part of the outer shell of the nano-driver 51 covering the periphery of the drive rod 4 passes through the reinforcement member 7 through the clamping hole 71.

[0072] The communication hole 73 penetrates the horizontal part of the reinforcement member 7 in the front-rear direction and is communicated with the tightening opening 72. One end of the screw passes through the reinforcement member 7 through the communication hole 73 and is threadedly connected to the nut on the front side of the reinforcement member 7. By adjusting the relative position of the nut and the head on the screw, the clamping degree of the reinforcement member 7 on the nano-driver 51 can be changed, so that the installation and disassembly of the nano-driver 51 can be realized. One end of the cold finger mechanism 52 passes through the vacuum housing 8 and is in contact with the vertical part of the support base 1 and is hermetically connected to the vacuum housing 8. Among them, the vertical parts of the reinforcement member 7 and the support base 1 are fixedly connected to the cold finger mechanism 52 by screws.

[0073] In this embodiment, the materials of the reinforcement member 7, the movable seat 2, the support base 1 and the support rod 61 are all copper, so that the overall temperature of the fiber thermoelectric performance test device can tend to be stable, thereby ensuring the stability of the temperature of the fiber 91 to be measured and further improving the accuracy of the test.

[0074] Furthermore, an observation port 81 is provided at the top of the vacuum housing 8, and a transparent plate is arranged at the observation port 81. The transparent plate is hermetically connected to the vacuum housing 8, and the vacuum housing 8 seals the observation port 81 through the transparent plate. By providing the observation port 81, it is convenient for the operator to observe whether one of the fiber under test 91 and the heating wire 92 is disconnected. Especially when the operator cannot measure the experimental data all the time, through the observation port 81, it can be quickly judged whether there is a disconnection problem in the fiber under test 91 and the heating wire 92. By providing the transparent plate, it 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 alternative embodiment, the transparent plate is a magnifying glass, which is convenient for the operator to observe the states of the fiber under test 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 along with the movable seat 2. At the same time, the distance between the limiting member 63 and the lower surface of the horizontal part of the support seat 1 also decreases by the same distance, and the compression spring 62 is also compressed by the same length. During this process, the movable seat 2 drives the fiber under test 91 to gradually approach the heating wire 92 until the fiber under test 91 and the heating wire 92 are overlapped.

[0078] When the nano stepping motor rotates in the reverse direction to drive the rod body 41 to rotate downward, the ball 43 at the top of the rod body 41 will move downward by the same distance along with the rod body 41. At this time, due to the elastic action of the compression spring 62, the movable seat 2 moves downward by the same distance along with the ball 43, so that the movable seat 2 drives the fiber under test 91 to gradually move away from the heating wire 92, thereby realizing the separation of the heating wire 92 and the fiber under test 91. At the same time, the support rod 61 will also move downward by the same distance along with the movable seat 2, and the compression spring 62 returns to its initial compressed state, so as to facilitate the fiber under test 91 to be overlapped with the heating wire 92 again next time.

[0079] The fiber thermoelectric performance testing device provided by this embodiment has a simple and compact structure, high space utilization rate, effectively reducing the volume of the fiber thermoelectric performance testing device. At the same time, the fiber thermoelectric performance testing device controls the lapping and separation of the fiber 91 to be measured and the heating wire 92 in a mechanical manner, without using a magnetic field to control the positional relationship between the fiber 91 to be measured and the heating wire 92. In this way, not only can the lapping and separation of the fiber 91 to be measured and the heating wire 92 be accurately controlled, but also the manufacturing cost of the fiber thermoelectric performance testing device is reduced. At the same time, there is no need for an externally applied variable magnetic field, thus saving a large amount of energy consumption caused by setting the variable magnetic field, making the fiber thermoelectric performance testing device more energy-efficient and reducing the testing cost.

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

[0081] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, 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, it should be considered as the scope described in this specification.

[0082] The above-described embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but should not be construed as limiting the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended 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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