Polarization jig for annular piezoelectric bimorph
By designing a polarization fixture suitable for annular piezoelectric dual wafers, the use of a pressure spring and a polarized carrier plate to achieve good contact between the electrode and the external power supply device, the problem of poor electrode contact in the prior art is solved and the polarization quality and performance are improved.
Patent Information
- Application Number
- CN202421322230.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-06-11
AI Technical Summary
The existing polarization fixtures cannot adapt to the special structure of the positive and negative electrodes of the annular piezoelectric double wafers, which leads to poor electrode contact during polarization, affecting the polarization effect and performance.
A polarization fixture for an annular piezoelectric dual wafer is designed. By providing a first polarization assembly and a second polarization assembly, the pressure spring and a polarized carrier plate are used to achieve good contact between the electrodes of the annular piezoelectric dual wafer and the external power supply device, and adapt to the structure of the electrode angle.
Ensure good contact between the electrodes of the annular piezoelectric dual wafer and the electrodes of the external power supply device during the polarization process, improve the polarization quality and overall performance, and is suitable for annular piezoelectric dual wafers with a certain angle.
Smart Images
Figure CN222692266U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of piezoelectric ceramics, in particular to a polarization fixture for an annular piezoelectric bimorph. Background Art
[0002] In the application field of piezoelectric materials, annular piezoelectric bimorphs have become a hot spot for research and application due to their unique structure and performance. Annular piezoelectric bimorphs are made of a stack of multiple piezoelectric ceramic substrates and co-fired. Their unique annular structure enables them to fully utilize the lateral piezoelectric effect, i.e., the piezoelectric coefficient d31, thus performing well in dynamic applications. However, this type of piezoelectric bimorph will exhibit an obvious creep effect when used statically. Therefore, it is mainly used in applications that require dynamic response, such as light stretching, piezoelectric dispensing valves, in-situ testing, wing shock absorption, fiber optic sensors, piezoelectric pliers, and other fields.
[0003] In the preparation process of annular piezoelectric bimorphs, the polarization process is a crucial step. Polarization is to orient the grains in the piezoelectric ceramic along the direction of the electric field by applying a high DC voltage to form a dipole moment, so that the piezoelectric bimorph obtains piezoelectric properties. In a high temperature environment (such as 200°C), the lattice of the piezoelectric ceramic will be easier to orient, thereby greatly improving the success rate of polarization.
[0004] However, the existing polarization fixture design has limitations. They are only suitable for polarization with parallel positive and negative electrodes, and cannot adapt to the special structure of the annular piezoelectric bimorph where the positive and negative electrodes have an angle (0° to 120°). This limitation makes it impossible for the positive and negative electrodes of the annular piezoelectric bimorph to achieve good contact with the power electrode during the polarization process, thus affecting the polarization effect and final performance of the bimorph.
[0005] Therefore, in order to meet the polarization requirements of the annular piezoelectric bimorph, the present application provides a polarization fixture for the annular piezoelectric bimorph. Utility Model Content
[0006] In view of the problem that the polarization jig in the prior art cannot be directly applied to the polarization of annular piezoelectric dual chips, the present application provides a polarization jig for annular piezoelectric dual chips. The polarization jig for the annular piezoelectric dual chips is provided by setting a first polarization component and a second polarization component, wherein the compression spring sheet in the first polarization component is electrically connected to the first electrode of the annular piezoelectric dual chip, and a plurality of card slots are provided on the polarization carrier in the second polarization component, wherein the card slots are used to place the annular piezoelectric dual chips, and the contact point between the polarization carrier and the annular piezoelectric dual chip is electrically connected to the second electrode of the annular piezoelectric dual chip, so that the polarization jig for the annular piezoelectric dual chip can adapt to annular piezoelectric dual chips with a certain angle, ensure good contact between the first electrode and the second electrode of the annular piezoelectric dual chip and the electrode of the external power supply device during the polarization process, realize effective polarization of the annular piezoelectric dual chip, and improve the polarization quality and overall performance of the annular piezoelectric dual chip.
[0007] One embodiment of the present application provides a polarization fixture for an annular piezoelectric bimorph, comprising:
[0008] A first polarization component, the first polarization component comprises a resistor pressure plate and a plurality of compression spring plates, the resistor pressure plate is electrically connected to a first electrode of an external power supply device; the plurality of compression spring plates are electrically connected to the resistor pressure plate respectively, and the compression spring plate is electrically connected to a first electrode of an annular piezoelectric bimorph;
[0009] The second polarization component includes a polarization carrier and a plurality of slots arranged on the polarization carrier, the polarization carrier is electrically connected to the second electrode of the external power supply device, the slots are used to place the annular piezoelectric dual chip, and the polarization carrier and the annular piezoelectric dual chip have a contact point; the position of the slot on the polarization carrier corresponds to the compression spring sheet, and the contact point between the polarization carrier and the annular piezoelectric dual chip is electrically connected to the second electrode of the annular piezoelectric dual chip.
[0010] As an implementation manner, the slot opens from a surface of the polarization carrier plate close to the compression spring sheet and extends to a surface of the polarization carrier plate away from the compression spring sheet.
[0011] As an embodiment, the length of the slot is at least 1 mm smaller than the diameter of the annular piezoelectric bimorph.
[0012] As an implementation mode, a chamfer is provided at the contact point between the polarization carrier and the annular piezoelectric bimorph.
[0013] As an implementation manner, the first polarization component further includes a plurality of protection resistors, the protection resistors correspond to the compression spring sheets, and the resistor compression sheet and the compression spring sheet are electrically connected via the protection resistors.
[0014] As an implementation mode, the resistance of the protection resistor is not less than 5 megohms and the power is not less than 5 watts.
[0015] As an implementation mode, the plurality of compression spring sheets are symmetrically arranged on both sides of the resistance compression sheet, and a polarization carrier is arranged corresponding to the plurality of compression spring sheets on each side, and the card slots on the polarization carrier correspond one-to-one to the compression spring sheets.
[0016] As an implementation mode, it also includes a support rod, a support frame and a polarization strip;
[0017] The two support rods are relatively arranged on the surface of the polarization carrier away from the compression spring sheet, and the length direction of the support rod is perpendicular to the length direction of the polarization carrier;
[0018] The support frame is arranged on the support rod between the two polarization carriers;
[0019] A plurality of polarization strips are arranged at intervals on the surface of the support frame away from the support rod, the resistor pressure sheet and the protective resistor are fixed to the polarization strip by a first fastener, and the protective resistor and the compression spring sheet are fixed to the polarization strip by a second fastener.
[0020] As an implementation manner, the material of the polarization strip is a non-conductive material; the material of the support rod and the support frame is a conductive material.
[0021] As an implementation mode, the polarization jigs of the plurality of annular piezoelectric bimorphs are arranged in sequence from bottom to top, and the polarization jigs of two adjacent annular piezoelectric bimorphs are connected by a connecting column.
[0022] As described above, the polarization fixture of the annular piezoelectric bimorph of the present application has the following beneficial effects:
[0023] The polarization jig of the annular piezoelectric dual chip of the present application is provided with a first polarization component and a second polarization component. The first electrode of the annular piezoelectric dual chip is electrically connected to the first electrode of the external power supply device through a compression spring sheet and a resistance compression sheet. The second electrode of the annular piezoelectric dual chip is electrically connected to the contact point between the polarization carrier and the annular piezoelectric dual chip, and the polarization carrier and the second electrode of the external power supply device. The polarization jig of the annular piezoelectric dual chip can adapt to the annular piezoelectric dual chip with a certain angle between the first electrode and the second electrode, ensuring good contact between the first electrode and the second electrode of the annular piezoelectric dual chip and the electrode of the external power supply device during the polarization process, realizing effective polarization of the annular piezoelectric dual chip, and improving the polarization quality and overall performance of the annular piezoelectric dual chip. The polarization jig of the annular piezoelectric dual chip can not only improve the polarization efficiency of the annular piezoelectric dual chip, but also ensure the polarization quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 Shown is a schematic diagram of the three-dimensional structure of a polarization fixture of an annular piezoelectric bimorph according to an embodiment of the utility model;
[0025] Figure 2 The schematic diagram of the main structure of the polarization fixture of the annular piezoelectric bimorph according to the embodiment of the utility model is shown;
[0026] Figure 3 The schematic diagram of the top view of the polarization fixture of the annular piezoelectric bimorph according to the embodiment of the utility model is shown;
[0027] Figure 4 Shown is a schematic structural diagram of the electrical connection between the first polarization component and the second polarization component and the annular piezoelectric bimorph in the polarization fixture of the annular piezoelectric bimorph according to an embodiment of the utility model.
[0028] Component number description
[0029] 10, first polarization component; 20, second polarization component; 30, annular piezoelectric dual chip; 40, support rod; 50, support frame; 60, polarization strip; 61, first fastener; 62, second fastener; 70, connecting column; 110, resistor pressure sheet; 120, compression spring sheet; 130, protective resistor; 210, polarization carrier; 220, card slot; 310, first electrode; 320, second electrode. DETAILED DESCRIPTION
[0030] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.
[0031] See also Figures 1 to 4 It should be noted that the illustrations provided in this embodiment are only used to illustrate the basic concept of the utility model in a schematic manner, and the illustrations only show the components related to the utility model rather than the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.
[0032] The annular piezoelectric bimorph is made of a stack of multiple piezoelectric ceramic substrates and co-fired. It uses the transverse piezoelectric effect (i.e., d31) and exhibits a significant creep effect when used statically, so it is mainly used in dynamic applications. Compared with ordinary bimorphs, the annular piezoelectric bimorph has a higher output. By utilizing the positive and inverse piezoelectric effects of piezoelectric technology, it can be applied to many fields such as optical fiber stretching, piezoelectric dispensing valves, in-situ testing, wing shock absorption, optical fiber sensors, and piezoelectric pliers.
[0033] In the process of preparing annular piezoelectric bimorphs, the polarization process is an important step to make the annular piezoelectric bimorphs obtain piezoelectric properties. During the polarization process, a high DC voltage is applied to the piezoelectric bimorph, so that the grains in the ceramic are oriented along the direction of the electric field to form a dipole moment; at the same time, under high temperature conditions (such as 200°C), the lattice of the piezoelectric ceramic will be more easily oriented, which is conducive to the success of polarization.
[0034] The polarization jig in the prior art is mainly for piezoelectric ceramics whose lead electrodes are parallel to each other, but there is an angle between the lead electrodes of the annular piezoelectric dual-chip (the angle range can be 0° to 120°, for example, it can be 120°). Therefore, the polarization jig in the prior art is not suitable for the special structure of the annular dual-chip with angled electrodes.
[0035] In view of the above defects, the present application provides a polarization fixture for an annular piezoelectric bimorph, which is now described in detail through the following embodiments.
[0036] This embodiment provides a polarization fixture for an annular piezoelectric bimorph, such as Figure 1 As shown, the polarization fixture of the annular piezoelectric bimorph includes a first polarization component 10 and a second polarization component 20.
[0037] like Figures 1 to 4 As shown, the first polarization component 10 includes a resistor voltage sheet 110 and a plurality of compression spring sheets 120. The resistor voltage sheet 110 is electrically connected to the first electrode of an external power supply device; the plurality of compression spring sheets 120 are electrically connected to the resistor voltage sheet 110, respectively, and each compression spring sheet 120 is electrically connected to the first electrode 310 of the annular piezoelectric dual chip 30, that is, one compression spring sheet 120 is electrically connected to the first electrode 310 of one annular piezoelectric dual chip 30.
[0038] The second polarization component 20 includes a polarization carrier 210 and a plurality of slots 220 arranged on the polarization carrier 210, the slots 220 are used to place the annular piezoelectric dual chips 30, and the number of the slots 220 corresponds to the number of the compression spring sheets 120, and the positions of the slots 220 on the polarization carrier 210 correspond to the compression spring sheets 120; since the slots 220 are slots opened on the polarization carrier 210, the contact point between the edge of the slots 220 and the annular piezoelectric dual chips 30 is also the contact point between the polarization carrier 210 and the annular piezoelectric dual chips 30, the contact point between the polarization carrier 210 and the annular piezoelectric dual chips 30 is electrically connected to the second electrode 320 of the annular piezoelectric dual chips 30, and the polarization carrier 210 is electrically connected to the second electrode of the external power supply device.
[0039] The first electrode and the second electrode of the external power supply device have opposite polarities, and the first electrode of the external power supply device here refers to the positive electrode or the negative electrode of the external power supply device, and correspondingly, the second electrode of the external power supply device refers to the negative electrode or the positive electrode of the external power supply device. That is, the resistor voltage sheet 110 can be electrically connected to the positive electrode of the external power supply device, and can also be electrically connected to the negative electrode of the external power supply device. Similarly, the polarization carrier 210 can be electrically connected to the negative electrode of the external power supply device, and can also be electrically connected to the positive electrode of the external power supply device. The resistor voltage sheet 110 and the polarization carrier 210 must be electrically connected to different electrodes of the same external power supply device, so that the resistor voltage sheet 110 and the polarization carrier 210 can be electrically connected to the external power supply device respectively.
[0040] The compression spring sheet 120 cooperates with the card slot 220 to fix the annular piezoelectric dual chip 30 when the annular piezoelectric dual chip 30 is polarized. When the polarization jig of the annular piezoelectric dual chip is moved, the annular piezoelectric dual chip 30 will not fall off the polarization jig of the annular piezoelectric dual chip, which can make the use of the polarization jig of the annular piezoelectric dual chip more convenient and stable.
[0041] The length and shape of the compression spring piece 120 are determined by the angle between the first electrode 310 and the second electrode 320 of the annular piezoelectric bimorph 30 .
[0042] The polarization fixture of the annular piezoelectric dual-chip provided in this embodiment is provided with a first polarization component 10 and a second polarization component 20, wherein the resistor pressure plate 110 of the first polarization component 10 is electrically connected to the first electrode of the external power supply device, the compression spring sheet 120 is electrically connected to the resistor pressure plate 110, and is electrically connected to the first electrode 310 of the annular piezoelectric dual-chip 30; the polarization carrier 210 in the second polarization component 20 is electrically connected to the second electrode of the external power supply device, the card slot 220 is used to place the annular piezoelectric dual-chip 30, and the contact between the polarization carrier 210 and the annular piezoelectric dual-chip 30 is The second electrode 320 of the annular piezoelectric dual chip 30 is electrically connected to the second electrode 320, so that the polarization fixture of the annular piezoelectric dual chip can adapt to the annular piezoelectric dual chip 30 in which the first electrode 310 and the second electrode 320 have a certain angle, ensuring good contact between the first electrode 310 and the second electrode 320 of the annular piezoelectric dual chip 30 and the electrodes of the external power supply device during the polarization process, realizing effective polarization of the annular piezoelectric dual chip 30, improving the polarization quality and overall performance of the annular piezoelectric dual chip 30; and improving the efficiency and reliability of the polarization of the annular piezoelectric dual chip 30.
[0043] In an optional embodiment, if Figure 4 As shown, the slot 220 opens from the surface of the polarization carrier 210 close to the compression spring sheet 120 (the upper surface of the polarization carrier 210) and extends to the surface of the polarization carrier 210 away from the compression spring sheet 120 (the lower surface of the polarization carrier 210). The slot 220 passes through the upper and lower surfaces of the polarization carrier 210. The bottom of the annular piezoelectric dual chip 30 is supported by the slot 220, and the top of the annular piezoelectric dual chip 30 is pressed by the compression spring sheet 120 to ensure that during the polarization process, the annular piezoelectric dual chip 30 and the polarization jig can remain stable during the entire polarization and removal and placement of the polarization jig, thereby improving the reliability of polarization and improving the product quality of the annular piezoelectric dual chip 30 after polarization.
[0044] In an optional embodiment, if Figure 4 As shown, the length of the slot 220 is smaller than the diameter of the annular piezoelectric bimorph 30, and the length of the slot 220 refers to the opening length of the slot 220. Optionally, the length of the slot 220 is at least 1 mm smaller than the diameter of the annular piezoelectric bimorph 30, thereby ensuring that the annular piezoelectric bimorph 30 will not fall off from the slot 220 and fall onto the bottom surface of the polarization fixture.
[0045] In an optional embodiment, a chamfer is provided at the contact point between the polarization carrier 210 and the annular piezoelectric dual chip 30, that is, a chamfer is provided at the edge of the card slot 220 and the polarization carrier 210. As a result, the contact point between the polarization carrier 210 and the annular piezoelectric dual chip 30 is smoother, ensuring that during the polarization process, the card slot 220 will not cause damage to the annular piezoelectric dual chip 30, reducing the breakage rate of the annular piezoelectric dual chip 30 and ensuring the product quality of the annular piezoelectric dual chip 30.
[0046] In an optional embodiment, if Figures 1 to 3 As shown, the first polarization component 10 also includes a plurality of protective resistors 130, the number of which corresponds to the number of the compression spring sheets 120, and the compression spring sheets 120 are electrically connected to the resistor compression sheet 110 through the protective resistors 130. During the polarization process of the annular piezoelectric bimorph 30, the annular piezoelectric bimorph 30 may be broken down under high voltage. The provision of the protective resistors 130 can prevent the circuit from being damaged during the breakdown of the annular piezoelectric bimorph 30, thereby increasing the service life of the polarization fixture. Optionally, the resistance of the protective resistor 130 is not less than 5 megohms, and the power is not less than 5 watts.
[0047] In an optional embodiment, if Figures 1 to 3 As shown, the polarization fixture of the annular piezoelectric bimorph includes a resistor sheet 110, and a plurality of protective resistors 130 are arranged on both sides of the resistor sheet 110 along the length direction of the resistor sheet 110. The length direction of the protective resistor 130 is perpendicular to the length direction of the resistor sheet 110. One end of the protective resistor 130 is electrically connected to the resistor sheet 110 through a first fastener 61, and the other end of the protective resistor 130 is electrically connected to the compression spring sheet 120 through a second fastener 62. In order to save space and raw materials, the protective resistors 130 can be symmetrically arranged on both sides of the resistor sheet 110. Corresponding to the compression spring sheet 120 on each side, a polarization carrier 210 (that is, two polarization carriers 210) is respectively arranged, and the number of the slots 220 opened on each polarization carrier 210 is the same as the number of the compression spring sheet 120 on the corresponding side, and the position of the slots 220 corresponds to the position of the compression spring sheet 120, and the length direction of the polarization carrier 210 is parallel to the length direction of the resistor sheet 110.
[0048] like Figure 1 and Figure 2 As shown, two support rods 40 are arranged on the surface of the two polarization carriers 210 facing away from the compression spring sheet 120 (the lower surface of the polarization carriers 210), the length direction of the support rods 40 is perpendicular to the length direction of the polarization carriers 210, and the length direction of the support rods 40 is also perpendicular to the length direction of the resistance pressure sheet 110, and the projection of the two support rods 40 and the two polarization carriers 210 on the bottom surface shown in the figure is a square frame structure, which can be a rectangular frame structure or a square frame structure.
[0049] like Figure 1 and Figure 2As shown, a support frame 50 is arranged on the support rod 40 between two polarization carriers 210, and the projection of the support frame 50 on the bottom surface shown in the figure is a square frame structure. Along the direction in which the support frame 50 is parallel to the support rod 40, a plurality of polarization strips 60 are arranged at intervals on the surface of the support frame 50 away from the support rod 40 (the upper surface of the support frame 50), and the length direction of the polarization strips 60 is parallel to the length direction of the polarization carrier 210. Since the polarization strips 60 are used to fix the resistance sheet 110 and the protective resistor 130, and to fix the protective resistor 130 and the compression spring sheet 120, the number of polarization strips 60 arranged can be three. The resistance sheet 110 covers the surface of the polarization strip 60 located in the middle position away from the support frame 50 (the upper surface of the polarization strip 60), and one end of the resistance sheet 110 and the protective resistor 130 is fixed to the above-mentioned polarization strip 60 by a first fastener 61. The other end of the protective resistor 130 and one end of the compression spring sheet 120 are fixed to the upper surface of the polarization strips 60 located on both sides by the second fastener 62. The polarization strip 60, the support rod 40 and the support frame 50 are fixedly connected by fasteners. The first fastener 61 and the second fastener are bolts, for example, they can be M4 bolts. The material of the support rod 40 and the support frame 50 is a conductive material; in order to ensure the insulation between the resistor pressure sheet 110 and the polarization strip 60, the insulation between the protective resistor 130 and the polarization strip 60, and the insulation between the compression spring sheet 120 and the polarization strip 60, the material of the polarization strip 60 is a non-conductive material. Since the polarization jig of the annular piezoelectric dual chip needs to polarize the annular piezoelectric dual chip 30 at a high temperature of 200°C, the materials of the various components of the polarization jig of the annular piezoelectric dual chip must also have the property of being able to withstand 200°C for a long time.
[0050] The polarization jig of the annular piezoelectric dual chip set in this embodiment can arrange a large number of annular piezoelectric dual chips 30 uniformly in the polarization jig for polarization. The polarization jig is convenient for observing the connection status between the first electrode and the second electrode of the external power supply device and the first electrode 310 and the second electrode 320 of the annular piezoelectric dual chip 30. It can also be disassembled and parts replaced to adjust the limit distance to use annular piezoelectric dual chips 30 of different specifications, and the structure is flexible.
[0051] In an optional embodiment, if Figures 1 to 3 As shown, the polarization jigs of the annular piezoelectric bimorphs can be stacked from bottom to top, and the polarization jigs of two adjacent annular piezoelectric bimorphs are connected by a connecting column 70. Figures 1 to 3 The number of polarization jigs in the figure is two, but not limited to the number shown in the figure. The number of polarization jigs can be adjusted according to the number of annular piezoelectric dual chips 30 that need to be polarized. To ensure stability and polarization effect, the number of polarization jigs is controlled to no more than 10 as much as possible.
[0052] This embodiment also provides a polarization method of a polarization fixture of an annular piezoelectric bimorph, comprising the following steps:
[0053] S1, multiple polarization bars 60 and support rods 40 are fixed to the support frame 50 by fasteners, and two polarization carriers 210 are fixed to the two ends of the support rod 40 respectively, and then the resistor pressing sheet 110 and the protective resistor 130 are fixed to the polarization bar 60 located in the middle position by the first fastener 61, and the protective resistor 130 and the compression spring sheet 120 are fixed to the polarization bars 60 on both sides by the second fastener 62, and the assembly of a polarization jig is completed. According to step S1, the assembly of the required number of polarization jigs is completed.
[0054] S2. Lift the compression spring sheet 120 and place the annular piezoelectric dual chip 30 in the slot 220 of the polarization carrier 210. During the process, the annular piezoelectric dual chip 30 should be handled with care to avoid collision between the annular piezoelectric dual chip 30 and the slot 220.
[0055] S3. After the polarization jig is fully filled with the annular piezoelectric bimorph 30, the polarization jig needs to be arranged and assembled in a bottom-up order, and two adjacent polarization jigs are connected by connecting columns 70.
[0056] S4. Put the polarization jig assembled in a certain order into an oven. During the polarization process, the temperature inside the oven is steadily maintained at 190°C to 200°C, the voltage is 0.150KV to 0.210KV, and the polarization time is 25min to 35min.
[0057] S5. After the polarization is completed, the polarization jig and the annular piezoelectric bimorph 30 are taken out and cooled. After the temperature of the annular piezoelectric bimorph 30 drops to room temperature, a discharge treatment is performed.
[0058] In step S4, before placing the polarization jig into the oven, it is necessary to check whether the electrodes are properly positioned and whether all the power lines are connected.
[0059] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.
Claims
1. A polarization fixture for an annular piezoelectric bimorph, characterized in that: include: A first polarization component (10), the first polarization component (10) comprising a resistance pressure plate (110) and a plurality of compression spring plates (120), the resistance pressure plate (110) being electrically connected to a first electrode of an external power supply device; the plurality of compression spring plates (120) being electrically connected to the resistance pressure plate (110) respectively, and the compression spring plates (120) being electrically connected to a first electrode (310) of an annular piezoelectric bimorph (30); A second polarization component (20), the second polarization component (20) includes a polarization carrier (210) and a plurality of slots (220) arranged on the polarization carrier (210), the polarization carrier (210) is electrically connected to the second electrode of the external power supply device, the slots (220) are used to place the annular piezoelectric dual chip (30), and the polarization carrier (210) and the annular piezoelectric dual chip (30) have a contact point; the position of the slots (220) on the polarization carrier (210) corresponds to the compression spring sheet (120), and the contact point between the polarization carrier (210) and the annular piezoelectric dual chip (30) is electrically connected to the second electrode (320) of the annular piezoelectric dual chip (30).
2. The polarization fixture of the annular piezoelectric bimorph according to claim 1 is characterized in that: The slot (220) opens from a surface of the polarization carrier (210) close to the compression spring sheet (120) and extends to a surface of the polarization carrier (210) away from the compression spring sheet (120).
3. The polarization jig of the annular piezoelectric bimorph according to claim 1 or 2, characterized in that: The length of the clamping groove (220) is at least 1 mm smaller than the diameter of the annular piezoelectric bimorph (30).
4. The polarization fixture of the annular piezoelectric bimorph according to claim 1, characterized in that: A chamfer is provided at the contact point between the polarization carrier plate (210) and the annular piezoelectric bimorph (30).
5. The polarization jig of the annular piezoelectric bimorph according to claim 1, characterized in that: The first polarization component (10) further comprises a plurality of protective resistors (130), wherein the protective resistors (130) correspond to the compression spring sheets (120), and the resistor compression sheets (110) and the compression spring sheets (120) are electrically connected via the protective resistors (130).
6. The polarization jig of the annular piezoelectric bimorph according to claim 5, characterized in that: The resistance of the protection resistor (130) is not less than 5 megohms, and the power is not less than 5 watts.
7. The polarization jig of the annular piezoelectric bimorph according to claim 5 or 6, characterized in that: The plurality of compression spring sheets (120) are symmetrically arranged on both sides of the resistance compression sheet (110), and a polarization carrier (210) is arranged corresponding to the plurality of compression spring sheets (120) on each side, and the card slots (220) on the polarization carrier (210) correspond one to one with the compression spring sheets (120).
8. The polarization jig of the annular piezoelectric bimorph according to claim 7, characterized in that: It also includes a support rod (40), a support frame (50) and a polarization strip (60); The two support rods (40) are arranged opposite to each other on a surface of the polarization carrier (210) away from the compression spring sheet (120), and the length direction of the support rods (40) is perpendicular to the length direction of the polarization carrier (210); The support frame (50) is arranged on the support rod (40) between the two polarization carriers (210); A plurality of polarization strips (60) are arranged at intervals on the surface of the support frame (50) facing away from the support rod (40); the resistor pressure sheet (110) and the protective resistor (130) are fixed to the polarization strip (60) via a first fastener (61); and the protective resistor (130) and the compression spring sheet (120) are fixed to the polarization strip (60) via a second fastener (62).
9. The polarization jig of the annular piezoelectric bimorph according to claim 8, characterized in that: The material of the polarization strip (60) is a non-conductive material; the material of the support rod (40) and the support frame (50) is a conductive material.
10. The polarization jig of the annular piezoelectric bimorph according to claim 8, characterized in that: The polarization jigs of the plurality of annular piezoelectric bimorphs are arranged in sequence from bottom to top, and the polarization jigs of two adjacent annular piezoelectric bimorphs are connected via a connecting column (70).