CN114263082A - Road temperature rising device, road piezoelectric energy collector field air polarization system and field air polarization method - Google Patents
Road temperature rising device, road piezoelectric energy collector field air polarization system and field air polarization method Download PDFInfo
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- CN114263082A CN114263082A CN202111362378.2A CN202111362378A CN114263082A CN 114263082 A CN114263082 A CN 114263082A CN 202111362378 A CN202111362378 A CN 202111362378A CN 114263082 A CN114263082 A CN 114263082A
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Abstract
The invention relates to a road temperature raising device which comprises a heating assembly and an isolation cover, wherein the heating assembly is suitable for heating a preset road surface, the isolation cover is arranged on the periphery of the heating assembly, and a sealing strip is arranged at one end, in contact with the preset road surface, of the isolation cover. The movable road temperature raising device can heat and control the temperature of a specific road surface, realizes the temperature environment for piezoelectric material polarization on the road site, and solves the condition limitation that the piezoelectric ceramic polarization can only be completed in a laboratory or a factory in the prior art. The invention also relates to an on-site air polarization system and an on-site air polarization method for the road piezoelectric energy collector.
Description
Technical Field
The invention relates to the technical field of polarization of piezoelectric ceramic materials, in particular to a field polarization system and a field polarization method of a road piezoelectric energy collector.
Background
Piezoelectric ceramics are a class of ceramic materials with piezoelectric properties that enable the conversion between mechanical and electrical energy. The piezoceramic material is widely applied in many fields, but is rarely related to the field of road engineering, and considering that the road surface is subjected to repeated loading of automobiles every day, the energy generated by the piezoceramic material is immeasurable, and if the piezoceramic material can be used for generating electricity, good economic and environmental benefits are inevitably generated. The road piezoelectric energy collection is used as a green energy utilization technology for converting renewable resources into electric energy, has wide application prospect and low-carbon significance, and conforms to the times theme of low-carbon economy, energy conservation and environmental protection.
The fatigue degradation of the piezoelectric collector under long-term traffic load can influence the energy conversion efficiency, and after the piezoelectric collector reaches the design service life, the PZT piezoelectric ceramics in the collector can have depolarization and breakage phenomena, and the pavement integrity can be damaged when the cost of the piezoelectric collector is too high by replacing the piezoelectric collector in a pavement transformation mode. The defects are that the prior art can only complete the piezoelectric ceramic polarization in a laboratory or a factory, and the technology and the related equipment for polarizing the piezoelectric material on the road site are lacked.
Disclosure of Invention
The invention aims to provide a device for road temperature rise on a road site, a system for piezoelectric material polarization on the road site and a method for air polarization on the road site.
Therefore, the road temperature raising device comprises a heating assembly and an isolation cover, wherein the heating assembly is suitable for heating a preset road surface, the isolation cover is arranged on the periphery of the heating assembly, and a sealing strip is arranged at one end, which is in contact with the preset road surface, of the isolation cover.
Furthermore, the heating assembly is a hot air device and comprises a pavement heating flat plate, the pavement heating flat plate is suitable for heating a preset pavement, and the isolation cover is a heat preservation cover arranged on the periphery of the pavement heating flat plate.
The heating assembly can also be a microwave heating device, the heating assembly further comprises microwave heating liquid pre-buried under the preset road surface, and the microwave generated by the microwave heating device acts on the microwave heating liquid, so that the temperature of the preset road rises through heat transfer after the temperature of the microwave heating liquid rises.
Furthermore, the movable heating vehicle comprises a folding platform which is arranged on the rear side of the hopper and can be driven, the heating component is connected to the folding platform, and the movable heating vehicle can drive the folding platform to enable the sealing strip to be attached to the edge of the preset road surface.
Furthermore, the folding platform comprises a folding base, a connecting rod movably connected with the end of the folding base and a folding platform outrigger movably connected with the connecting rod, the heating assembly is arranged on the folding platform outrigger, the mobile heating vehicle further comprises a main support frame connected with the folding base main body and an auxiliary support frame connected with one end of the folding platform, the main support frame is connected with the vehicle hopper main body, the auxiliary support frame is connected with the tail part of the vehicle hopper, the folding platform outrigger can extend out of the vehicle hopper, and the connecting rod can enable the heating assembly to be overturned and placed right above a preset road surface.
Furthermore, the polarization voltage pressurization and regulation system comprises a field air polarization host machine, an adjustable voltage controller and an electric control box, wherein the field air polarization host machine is connected with the motor-driven heating vehicle through a field polarization electrode lead, and the adjustable voltage controller is arranged in the electric control box and is electrically connected with the field air polarization host machine.
The polarization environment and process monitoring safety system comprises a polarization environment temperature monitoring module, a polarization process current protection monitoring module and a polarization process overtemperature electric leakage alarming self-power-off module, wherein the polarization environment temperature monitoring module is connected with a temperature sensor pre-embedded in the piezoelectric energy collector through a reserved lead interface, the polarization process current protection monitoring module is connected with a field air polarization host, and the polarization process overtemperature electric leakage alarming self-power-off module is connected with an electric control box.
Furthermore, the test system for the field polarization effect of the piezoelectric collector is further included.
The invention also comprises a field air polarization method of the road piezoelectric energy collector, which comprises the field air polarization system of the road piezoelectric energy collector, and the method comprises the following steps:
(1) heating the pavement right above the piezoelectric energy collector to enable the temperature of the piezoelectric energy collector to rise to a preset temperature;
(2) applying a predetermined polarization voltage to the piezoelectric energy harvester;
(3) and maintaining the preset temperature and the preset polarization voltage for a preset time to complete the polarization of the piezoelectric collector.
Further, step (1) includes that the sealing strip of the pavement heating flat plate is attached to the edge of the pavement right above the piezoelectric energy collector, and the real-time pavement heating temperature is controlled through the heating temperature control electronic module, so that the pavement is rapidly heated to meet the field polarization requirement.
Further, after field polarization is completed, the field polarization effect of the road piezoelectric energy collector is tested, and the test parameters comprise capacitance C, resonance impedance Zr, planar electromechanical coupling coefficient Kp and mechanical quality factor Qm of piezoelectric ceramics in the collector unit.
The invention has the beneficial effects that:
(1) according to the specific embodiment of the invention, the road surface right above the piezoelectric energy collector is heated by the road temperature raising device, the temperature of the piezoelectric energy collector is controlled, the temperature requirement of performing high-temperature polarization on the piezoelectric material air on the road site is met, and the condition limitation that the piezoelectric ceramic polarization can only be completed in a laboratory or a factory in the prior art is solved.
(2) The road heating device is integrated on the motor-driven heating vehicle, the pneumatic self-folding platform in the vehicle hopper effectively connects the heating assembly with the on-site air polarization host, the integration and the operation automation degree are high, and the piezoelectric material polarization device is suitable for piezoelectric material polarization under the on-site environment of the road.
(3) The polarization environment and process monitoring safety system is added, the problem that piezoelectric materials in a road piezoelectric collector and the whole piezoelectric system are damaged and damaged possibly due to the fact that the field polarization environment is unstable is solved, and by the aid of the polarization environment temperature monitoring module, the polarization process current protection monitoring module and the polarization process over-temperature electric leakage alarm self-power-off module, various parameters in the field polarization process are effectively monitored, and stability and safety of the field polarization construction process are improved.
(4) The on-site polarization effect testing system is installed, performance testing of the road piezoelectric energy collector can be directly carried out after on-site polarization is completed, on-site polarization effect is evaluated in real time, on-site polarization working efficiency is improved, maintenance data support is provided for the whole road piezoelectric system, and cost is effectively saved.
The on-site air polarization method of the road piezoelectric energy collector realizes on-site repolarization of a large amount of fatigue retreating polarized piezoelectric ceramics in the road piezoelectric energy collector under the condition of not damaging the pavement structure, avoids damage to the pavement by replacing a piezoelectric transducer, greatly saves cost, has simple and efficient polarization process, and effectively solves the problem of recovery processing after the design service life of the road piezoelectric energy collector is reached.
Drawings
FIG. 1 is a schematic illustration of a transport state of a mobile heating vehicle and a road warming device according to certain embodiments of the present invention;
FIG. 2 is a schematic view of the working states of the mobile heating vehicle and the road warming device;
FIG. 3 is a schematic structural connection diagram of a polarization voltage pressurization and regulation system, a polarization environment and process monitoring safety system, and a piezoelectric energy harvester field polarization effect test system;
FIG. 4 is a schematic connection diagram of the movable road warming device, the polarization voltage pressurization regulating system, the polarization environment and process monitoring safety system, and the piezoelectric transducer field polarization effect testing system structure installed in the motor-driven heating vehicle;
FIG. 5 is a schematic diagram of an implementation of a road piezoelectric energy harvester field polarization system;
fig. 6 is a schematic diagram of a microwave heating road warming device.
Description of reference numerals: 1. moving the heating vehicle; 2. a car hopper; 3. a main supporting frame; 4. a secondary support frame; 5. folding the platform base; 6. a connecting rod; 7. an outrigger; 8. heating the flat plate by hot air; 9. a sealing strip; 10. an isolation cover; 11. a vibration excitation tester is additionally provided with a groove; 12. a heating temperature control electronic module; 13. An on-site air polarization host; 14. an electrical control box; 15. a field polarization effect tester; 16. a polarization current protection monitor; 17. an overtemperature alarm is used in the polarization process; 18. a short circuit current self-power-off device; 19. a manual emergency stop button; 20. reserving a lead interface; 21. polarizing the host cable; 22. an adjustable voltage controller; 23. a multi-channel oscilloscope; 24. an impedance matching analyzer; 25. an in-situ polarized electrode lead; 26. a road piezoelectric energy harvester; 27. piezoelectric ceramics; 28. a temperature sensor; 29. an underground cable; 30. a lead interface; 31. a road surface layer; 32. a road base layer; 33. a road piezoelectric power supply facility; 34. a heating assembly; 35. and (6) sealing the cover.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.
Referring to fig. 1 and 2, the road warming device for implementing the present invention includes a heating assembly 34, the heating assembly 34 includes a road surface heating plate, an isolation cover 10 and a sealing strip 9, the road surface heating plate is suitable for heating a predetermined road surface, the isolation cover 10 is disposed on the periphery of the road surface heating plate, and one end of the isolation cover 10 contacting the predetermined road surface is provided with the sealing strip 9. The road temperature raising device is mainly used for providing a high-temperature environment through field polarization of the ceramic piezoelectric energy collector buried under a road. In this embodiment, the predetermined road surface generally refers to a road surface layer 31 directly above the piezoelectric energy harvester, the heating component is a hot air device, the road surface heating plate is a hot air heating plate 8, the isolation cover 10 is made of stainless steel, the inner wall of the isolation cover 10 is provided with a fire-resistant heat-insulating fiber material layer, and the sealing strip 9 is a high-temperature-resistant elastic sealing strip 9. When the hot air component is used for heating the road surface, the hot air heating flat plate 8, the isolation cover 10 and the sealing strips 9 form a side heat-insulating sealed space on the preset road surface, hot air is blown to the side heat-insulating sealed space from the hot air heating flat plate 8, and heat is transferred from the road surface layer 31 to the piezoelectric energy collector positioned on the road base layer 32, so that the temperature of the road surface layer 31 and the road base layer 32 below the preset road surface is quickly raised, and the temperature required by field air polarization is reached. To control the temperature of the environment, a heating temperature controlled electronic module 12 may also be provided in the heating assembly 34. In other embodiments, the heating element 34 may also be a high-power microwave heating device, the isolation cover 10 is made of a metal material, a microwave heating liquid disposed in the sealing cover 35 made of a heat conducting material is disposed around the piezoelectric energy collector made of a piezoelectric ceramic material, the microwave generated by the heating element 34 acts on the microwave heating liquid to rapidly raise the temperature of the microwave heating liquid, and after the temperature of the microwave heating liquid is rapidly raised, the heat is conducted to a nearby road and the piezoelectric energy collector through the heat conducting cover body of the sealing cover 35, so that the temperature of the piezoelectric energy collector is rapidly raised, thereby achieving a temperature environment required for forming air polarization of piezoelectric ceramic, and the microwave heating liquid is common such as water.
In the above embodiment, referring to fig. 1 and fig. 2, a mobile heating cart 1 is further included, the mobile heating cart 1 includes a folding platform which is arranged at the rear side of the car hopper 2 and can be driven, the heating assembly is connected to the folding platform, and the mobile heating cart 1 can drive the folding platform to turn over a heating device such as a hot air heating flat plate and make the sealing strip 9 adhere to the edge of the predetermined road surface. In this embodiment, the actuatable folding platform is a pneumatic self-folding platform.
In the above embodiment, referring to fig. 1 and 2, the folding platform includes a folding base, a connecting rod 6 movably connected to an end of the folding base, and a folding platform outrigger 7 movably connected to the connecting rod 6, a heating component is installed on the folding platform outrigger 7, the mobile heating cart 1 further includes a main support frame 3 connected to a main body of the folding base, and an auxiliary support frame 4 connected to one end of the folding platform, the main support frame 3 is connected to a main body of the car hopper 2, the auxiliary support frame 4 is connected to a tail of the car hopper 2, the folding platform outrigger 7 can extend out of the car hopper 2, the connecting rod 6 can turn over the heating component such as a hot air heating plate and place the heating component right above a predetermined road surface, and angles of the main support frame and the auxiliary support frame 4 can be adjusted, so that a sealing strip 9 provided on the road surface heating plate can be attached to a road surface contact edge. In this embodiment, fig. 1 and 2 show the folding platform in two states of folding transportation and turning and lowering the pavement heating slab into operation, respectively.
Referring to fig. 3, 4 and 5, the present invention further includes a road piezoelectric energy collector 26 field air polarization system, which includes a polarization voltage pressurization and regulation system and the above-mentioned road warming device, the polarization voltage pressurization and regulation system includes a field air polarization host 13 connected with the motor-driven heating vehicle, an adjustable voltage controller 22 and an electric control box 14, the field air polarization host 13 is electrically connected with the piezoelectric energy collector through a field polarization electrode lead 25, and the adjustable voltage controller 22 is embedded in the electric control box 14 and electrically connected with the field air polarization host 13. In this embodiment, the polarization voltage pressurization and regulation system and the road warming device are arranged on the mobile heating vehicle 1, the piezoelectric energy collectors are arranged on the surface of the road base layer 32 at the lower part of the road surface layer 31 and connected through an underground cable system, each piezoelectric energy collector is provided with an independent cable to be connected with a road piezoelectric power supply facility 33, the power supply facility is a street lamp in this embodiment, and a lead interface 30 is arranged at the position of a road edge band; a temperature sensor 28 is arranged inside the piezoelectric energy collector, and the temperature sensor 28 is connected to a lead interface 30 at the position of a curb belt through an underground cable 29; lead interface 30 is connected to the in situ polarized various systems or devices via in situ polarized electrode lead 25.
In the above embodiment, as shown in fig. 3, 4, and 5, the polarization environment and process monitoring safety system is further included, and the safety system includes a polarization environment temperature monitoring module, a polarization process current protection monitoring module, and a polarization process over-temperature electric leakage alarm self-power-off module, where the polarization environment temperature monitoring module is connected to a temperature sensor 28 embedded in the piezoelectric energy harvester through a reserved lead interface 20, the polarization process current protection monitoring module is connected to the field air polarization host 13, and the polarization process over-temperature electric leakage alarm self-power-off module is connected to the electrical control box 14. In this embodiment, the polarization environment and process monitoring safety system comprises a polarization current protection monitor 16, a polarization process overtemperature alarm 17 and a polarization process overtemperature electric leakage alarm self-power-off device, wherein the polarization process overtemperature alarm 17 is connected with a temperature sensor 28 pre-embedded on a piezoelectric energy collector through a reserved lead interface 20, the polarization current protection monitor 16 is connected with a field air polarization host 13, and the polarization process overtemperature electric leakage alarm self-power-off device is connected with an electrical control box 14; in order to prevent the polarization process from accidents, the lower part of the on-site air polarization host 13 is provided with a manual emergency stop button 19; the polarization current protection monitor 16 is arranged in the field air polarization host 13 and comprises a digital display screen for displaying real-time polarization current, and once the current is abnormal in the polarization process, the polarization current protection monitor 16 triggers a short-circuit current self-power-off device 18; the polarization process overtemperature alarm 17 is arranged in the polarization current protection monitor 16, and an alarm is given out when the temperature in the polarization process is overtemperature or fluctuates too much; the field air polarization host 13 is provided with a reserved lead interface 20, and the piezoelectric energy collector is connected with a polarization host cable 21 of the field air polarization host 13 through the interface; the adjustable voltage controller 22 is installed inside the electrical control box 14, polarization voltage parameters of the field polarization process are input into the adjustable voltage controller 22 according to a specific program, and meanwhile, real-time polarization voltage monitoring of the whole polarization process is achieved.
In the above embodiment, as shown in fig. 3, 4 and 5, the test system for the field polarization effect of the piezoelectric collector is further included, and the test system includes a field polarization effect tester 15 and a field test system for the energy output characteristic of the piezoelectric transducer. After the field polarization of the road piezoelectric energy collector 26 in the preset road surface is completed, the field polarization effect test of the road piezoelectric energy collector 26 is carried out, the field polarization effect tester 15 and the impedance matching analyzer 24 are connected with the piezoelectric energy collector after the field polarization is completed through an electrode interface, and the capacitance C, the resonance impedance Zr, the plane electromechanical coupling coefficient Kp and the mechanical quality factor Qm of the piezoelectric ceramic 27 in the transducer unit are measured; the heating flat plate can be provided with devices for vehicle load excitation test and the like through an excitation tester additional groove 11, the output characteristics of the polarized piezoelectric energy collector are tested through a motor-driven single-channel vibration exciter, and the multi-channel vibration exciter 23 is connected for field polarization effect analysis.
The invention also discloses a field air polarization method of the road piezoelectric energy collector, which comprises the following steps:
(1) heating the pavement right above the piezoelectric energy collector to enable the temperature of the piezoelectric energy collector to rise to a preset temperature;
(2) applying a predetermined polarization voltage to the piezoelectric energy harvester;
(3) and maintaining the preset temperature and the preset polarization voltage for a preset time to complete the polarization of the piezoelectric collector.
(4) And testing the field polarization effect of the piezoelectric energy collector which completes polarization.
The step (1) comprises the steps of installing a road temperature rising device, a polarization voltage pressurization regulating system, a polarization environment and process monitoring safety system and a piezoelectric transducer field polarization effect testing system structure in a mobile heating vehicle 1, and rapidly moving the mobile heating vehicle 1 to a piezoelectric energy collector road surface area. The step (1) also comprises the steps that a heating component such as a hot air heating flat plate 8 extends out of the car hopper 2 through a folding platform outrigger 7, turns over through a folding platform connecting rod 6 and is placed right above a ground area to be heated, a pneumatic folding platform base 5 is connected with a main support frame 3 and an auxiliary support frame 4, and the angles of the main support frame 3 and the auxiliary support frame 4 are adjusted to enable a high-temperature-resistant elastic sealing strip 9 on the lower edge of the hot air heating flat plate 8 to be attached to the contact edge of the road surface; the lower part of the hot air heating flat plate 8 is connected with an isolation cover 10, and when a target pavement area is heated, the real-time pavement heating temperature is controlled through a heating temperature control electronic module 12, so that the pavement is quickly heated to meet the field polarization requirement.
Before the field polarization construction, firstly inputting polarization voltage parameters of the field polarization process into an adjustable voltage controller 22 according to a specific program, and simultaneously connecting a piezoelectric energy collector needing polarization with a polarization host cable 21 of a field air polarization host 13 through a reserved lead interface 20, so that after the environmental requirements of the field polarization condition are met, the field polarization can be carried out according to a preset program and the real-time polarization voltage monitoring of the whole field polarization process is realized;
and (3) in order to prevent the polarization process from causing accidents, a manual emergency stop button 19 is arranged at the lower part of the on-site air polarization host 13, once the current in the polarization process is abnormal, the polarization current protection monitor 16 triggers a short-circuit current self-power-off device 18, and an over-temperature alarm 17 for the polarization process when the temperature in the polarization process is over-temperature or the fluctuation is over-large can give an alarm.
After the field polarization of the road piezoelectric energy collector 26 in the preset road surface is finished in the step (4), carrying out field polarization effect test on the road piezoelectric energy collector 26, connecting the field polarization effect tester 15 and the impedance matching analyzer 24 with the piezoelectric energy collector after the field polarization is finished through an electrode interface, and measuring the capacitance C, the resonance impedance Zr, the plane electromechanical coupling coefficient Kp and the mechanical quality factor Qm of the piezoelectric ceramic 27 in the transducer unit; the hot air heating flat plate 8 can be provided with devices for vehicle load excitation test and the like through the excitation tester additional groove 11, the single-channel vibration exciter is driven by the motor to test the output characteristic of the piezoelectric energy collector after polarization, and the multi-channel vibration exciter 23 is connected to carry out field polarization effect analysis.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a road rising temperature device which characterized in that: including heating element and cage, heating element is applicable to and heats predetermined road surface, heating element's periphery is located to the cage, the cage is equipped with the sealing strip with predetermined road surface contact one end.
2. A road warming device according to claim 1, wherein: the heating assembly is a hot air device and comprises a pavement heating flat plate, the pavement heating flat plate is suitable for heating a preset pavement, and the isolation cover is a heat-insulating cover arranged on the periphery of the pavement heating flat plate.
3. A road warming device according to claim 1, wherein: the heating assembly is a microwave heating device, the heating assembly further comprises microwave heating liquid pre-buried under a preset road surface, and microwaves generated by the microwave heating device act on the microwave heating liquid, so that the temperature of the preset road rises through heat transfer after the temperature of the microwave heating liquid rises.
4. A road warming device according to claim 1, 2 or 3, wherein: still including removing the heating car, remove the heating car including establishing at the drivable folding platform of car hopper rear side, heating element connects on folding platform, it makes to remove the drivable folding platform of heating car the sealing strip laminates with the edge on predetermined road surface.
5. A road warming device according to claim 4, wherein: the folding platform comprises a folding base, a connecting rod and a folding platform outrigger, the connecting rod is movably connected with the end of the folding base, the folding platform outrigger is movably connected with the connecting rod, the heating assembly is installed on the folding platform outrigger, the mobile heating vehicle further comprises a main support frame and an auxiliary support frame, the main support frame is connected with the folding base main body, the auxiliary support frame is connected with the hopper tail portion, the folding platform outrigger can extend out of the hopper, and the connecting rod can enable the heating assembly to be overturned and placed right above a preset road surface.
6. An on-site air polarization system of a road piezoelectric energy collector, which comprises a polarization voltage pressurization regulating system and a road temperature rising device according to claim 5, and is characterized in that: the polarization voltage pressurization and regulation system comprises a field air polarization host machine, an adjustable voltage controller and an electric control box, wherein the field air polarization host machine is connected with the motor-driven heating vehicle through a field polarization electrode lead, and the adjustable voltage controller is arranged in the electric control box and is electrically connected with the field air polarization host machine.
7. The on-site air polarization system of the road piezoelectric energy collector as claimed in claim 6, wherein: the polarization environment and process monitoring safety system comprises a polarization environment temperature monitoring module, a polarization process current protection monitoring module and a polarization process overtemperature electric leakage alarming self-power-off module, wherein the polarization environment temperature monitoring module is connected with a temperature sensor pre-embedded in the piezoelectric energy collector through a reserved lead interface, the polarization process current protection monitoring module is connected with a field air polarization host, and the polarization process overtemperature electric leakage alarming self-power-off module is connected with an electric control box.
8. The on-site air polarization system of the road piezoelectric energy collector as claimed in claim 6, wherein: the test system for the field polarization effect of the piezoelectric collector is further included.
9. A road piezoelectric energy collector field air polarization method, which adopts the road piezoelectric energy collector field air polarization system of claim 6, and is characterized in that: the method comprises the following steps:
(1) heating the pavement right above the piezoelectric energy collector to enable the temperature of the piezoelectric energy collector to rise to a preset temperature;
(2) applying a predetermined polarization voltage to the piezoelectric energy harvester;
(3) and maintaining the preset temperature and the preset polarization voltage for a preset time to complete the polarization of the piezoelectric collector.
10. The on-site air polarization method of the road piezoelectric energy collector as claimed in claim 9, wherein: and after the field polarization is finished, testing the field polarization effect of the road piezoelectric energy collector, wherein the test parameters comprise the capacitance C, the resonance impedance Zr, the planar electromechanical coupling coefficient Kp and the mechanical quality factor Qm of the piezoelectric ceramics in the collector unit.
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| CN107240640A (en) * | 2017-06-06 | 2017-10-10 | 西南科技大学 | A kind of piezoelectric polarization device |
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| CN207250566U (en) * | 2017-09-27 | 2018-04-17 | 无锡市惠丰电子有限公司 | A kind of air polarization frock of piezoelectric ceramic piece |
| CN111962365A (en) * | 2020-08-20 | 2020-11-20 | 湖南途嘉道路养护有限责任公司 | Asphalt pavement in-situ heat regeneration process and regeneration system |
| CN113288202A (en) * | 2020-02-24 | 2021-08-24 | 通用电气精准医疗有限责任公司 | Method and system for reversing depolarization effects exhibited by ultrasound transducers |
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2021
- 2021-11-17 CN CN202111362378.2A patent/CN114263082B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| AU5779780A (en) * | 1979-05-01 | 1980-11-06 | Toray Industries, Inc. | Transducer element |
| CN104370556A (en) * | 2014-12-04 | 2015-02-25 | 湖南嘉业达电子有限公司 | Method and device for polarizing piezoelectric ceramics in sulfur hexafluoride gas |
| CN107240640A (en) * | 2017-06-06 | 2017-10-10 | 西南科技大学 | A kind of piezoelectric polarization device |
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| CN207250566U (en) * | 2017-09-27 | 2018-04-17 | 无锡市惠丰电子有限公司 | A kind of air polarization frock of piezoelectric ceramic piece |
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| CN114263082B (en) | 2023-04-07 |
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