37 results about "Piezo electric" patented technology

The invention provides structures and synthesis of a class of piezoelectric monomers and COFs with fluorine-substituted side chains tethered on the peripheral position of an aromatic moiety (thus different functional side chains). The multi-fluoro groups on the mentioned piezoelectric COFs provide abundant piezoelectric active sites, which enable the application as the active layer for PENGs. The exemplary embodiments also provide a process for the fabrication of a piezoelectric COF and a process for the fabrication of the piezoelectric nanogenerator utilizing mentioned piezoelectric COF.

The invention relates to a photovoltaic and piezoelectric combined pavement photovoltaic module, and belongs to the technical field of new energy power generation. The photovoltaic tile comprises a bottom protection layer, a multi-layer stacked piezoelectric ceramic array, a photovoltaic tile base, an elastic protection layer, a photovoltaic cell array and a high-pressure-resistant light-transmitting plate from bottom to top, the photovoltaic cell array is arranged in the elastic protection layer; the photovoltaic brick base is provided with through holes arranged in an array, a spring is fixed in each through hole, each spring corresponds to one multi-layer stacked piezoelectric ceramic, and the two ends of each spring are in contact with the elastic protective layer and the multi-layer stacked piezoelectric ceramic respectively; the pavement photovoltaic module further comprises an external protection layer, and the bottom protection layer, the multilayer stacked piezoelectric ceramic array, the photovoltaic brick base, the spring, the elastic protection layer, the photovoltaic cell array and the high-pressure-resistant light-transmitting plate are stacked in the external protection layer. The piezoelectric ceramic is combined with the photovoltaic cell, vehicle rolling and solar energy are fully utilized, dual energy output is achieved, and a sustainable energy solution is provided for an intelligent city.

An energy harvesting system 60 comprises a transducer 100 arranged to provide an output signal in response to being deformed by an applied force, and a structure 300 in mechanical communication with the transducer. The structure is arranged to cause deformation of the transducer and comprises a first portion 310, a second portion 320 in contact with the transducer, and one or more third portions 330 connecting the first and second portions. The one or more third portions comprise one or more curved arms. The first portion may be centrally located in the structure and the second portion may be provided around the first portion. The first portion may be rotatable relative to the second portion and may be a shaft or hub. The third portion(s) may vary or taper towards the second portion. The transducer may be piezoelectric or magnetostrictive. The system may be used in a projectile or munition.

A workpiece support (18) for supporting a workpiece (14), the workpiece support (18) comprising a workpiece support body (54) and a workpiece support element (20) associated with the workpiece support body (54) for engaging the workpiece (14) and a piezo electric actuator (32) being associated with the workpiece support body (54) for moving the workpiece support element (20) for supporting the workpiece (14). The workpiece support body (54) comprising one or more flexures (44) that enable a movable portion (42) of the workpiece support body (54) to move when acted on by the piezo electric actuator (32) and to move the workpiece support element (20). The workpiece support (18) can comprise two or more workpiece support bodies (54) and a piezo electric actuator (32) being associated with each workpiece support body (54) for moving the respective workpiece support elements (20).

In an example, the present invention provides a laser system. The laser system has a source laser (e.g., CBC) coupled to first mirror device opposing a second mirror device and configured to generate a resonating laser beam between the first mirror and the second mirror. In an example, the system has a piezoelectric device configured to the second mirror device and characterized by a refractive e index such that one or more voids is changed by applying an energy to the piezo electric device to cause a change in a value of the refractive index, e.g., by more than 0.0001, to allow the resonating laser beam or a portion of the resonating laser to traverse through a portion of the second mirror device.

The application provides a ferroelectric metal and a preparation method and application thereof. The ferroelectric metal of the application is composed of cubic silicon carbide crystals and doping elements doped therein, wherein the concentration of the doping elements is greater than or equal to 1*10 18 cm ‑3 The material of the application can be prepared by a chemical vapor deposition method, a high-temperature solution growth method, a solid-phase sintering method, a pulse laser deposition method and the like. Since the conductivity of metal, the switching characteristics of ferroelectric and the force-electric coupling characteristics of piezoelectric are integrated, the ferroelectric metal of the application has great application value in the fields of high-performance transducers, high-sensitivity sensors, low-power micro-electro-mechanical system (MEMS), next-generation multifunctional electronic devices and the like.

Provided is a low mass antigen detecting device for quickly and conveniently detecting various types of antigens. In a low mass antigen detecting device for detecting a low mass antigen through a sensor, the sensor includes a piezo-electric substrate, a sensing layer coupled to one surface of the piezo electric substrate and comprising at least one antigen-BSA, an input IDT electrode disposed at one side of the piezo-electric substrate to apply an input frequency provided as a sweep frequency, and an output IDT electrode disposed at the other side of the piezo-electric substrate to output an output frequency.

The invention concerns a wafer positioning stage with 4 degrees of freedom for use in a cryogenic environment and suited for cryogenic chip probing. 10 Special focus has been attended to realize high speed and considerable lifetime improvements with respect to current piezo based positioners. In the presented concept we introduce cryogenic compatible electromagnetic linear motors in close 15 distance to the contacting probes which enables high speed, no wear and precise displacements. All required 4 degrees of freedom, positioning in X, Y, rotation around Z and probing action Z displacement have been integrated in a stand-alone module. 20 Special attention has been put to keep the substrate table at the desired temperature under moving circumstances and minimizing the dissipation during cryogenic chip probing.

The invention provides a low-interface toughness coating coupling piezoelectric deicing device and a test method. The device comprises a signal generator (1), a power supply (2), a power amplifier (3), a piezoelectric plate (4), a substrate plate (5), a low interface toughness coating (6), a fixed bottom plate (7), a clamping device (8), a fixing device (9) and a vibration meter (10). The invention further relates to a testing method of the device. The device can fully show the state of the ice layer on the surface of the sample, the interface change and the fragmentation or falling process when the coating and the piezoelectric vibration act at the same time; according to the invention, the comprehensive deicing performance of the coupling piezoelectricity of the low-interface toughness coating can be accurately evaluated; the deicing device for coupling the low-interface-toughness coating with the piezoelectricity is easy to build, simple to operate and high in applicability, can quantitatively evaluate the anti-icing / deicing performance of the sample at multiple angles, and provides technical support for development of the field of low-energy-consumption, large-area and efficient deicing.

In an example, the present invention provides a laser system. The laser system has a source laser (e.g., CBC) coupled to first mirror device opposing a second mirror device and configured to generate a resonating laser beam between the first mirror and the second mirror. In an example, the system has a piezoelectric device configured to the second mirror device and characterized by a refractive e index such that one or more voids is changed by applying an energy to the piezo electric device to cause a change in a value of the refractive index, e.g., by more than 0.0001, to allow the resonating laser beam or a portion of the resonating laser to traverse through a portion of the second mirror device.

In an example, the present invention provides a laser system. The laser system has a source laser (e.g., CBC) coupled to first mirror device opposing a second mirror device and configured to generate a resonating laser beam between the first mirror and the second mirror. In an example, the system has a piezoelectric device configured to the second mirror device and characterized by a refractive e index such that one or more voids is changed by applying an energy to the piezo electric device to cause a change in a value of the refractive index, e.g., by more than 0.0001, to allow the resonating laser beam or a portion of the resonating laser to traverse through a portion of the second mirror device.

The valve system, to be used as a suction valve and / or as a discharge valve in a reciprocating compressor, comprises a valve body, at least one sensor mounted on the valve body and configured to detect a parameter associated to operation of the valve device, and a wireless communication unit electrically coupled to the at least one sensor and configured to transmit information detected by the at least one sensor; the at least one sensor is associated with a fixing member that is inserted in holes of the valve body and that seals the holes. The innovative valve system may comprise further at least one energy harvesting system, which could be for example thermoelectric or piezoelectric, located preferably in or on or at the valve body.

This invention introduces a novel energy conversion system and method that synergistically combines the electrohydraulic and piezoelectric effects to enhance electricity generation efficiency. By leveraging the overunity energy potential of cavitation, the system achieves exceptionally high energy efficiency for producing electrical energy. It features a hermetically sealed container filled with a pressurized dielectric liquid, electrodes connected to a high-voltage power source to induce cavitation, and a geometric shape incorporating piezoelectric material to directly convert energy from pressure shock waves into electricity. This approach uniquely exploits cavitation dynamics to generate sustainable and efficient electrical power, offering a scalable solution adaptable to various applications. The invention has the potential to revolutionize renewable energy systems by providing a cleaner and highly efficient source of electricity.

The invention provides a tunnel lining active and passive monitoring method and system based on piezoelectricity, and relates to the technical field of tunnel lining monitoring, the method comprises the steps that a plurality of monitoring faces are arranged in a tunnel lining, each monitoring face is provided with a plurality of piezoelectric sensors, and the monitoring faces are used for dividing effective sections of the tunnel lining; performing passive monitoring based on the piezoelectric sensor, and combining temperature correction and time-frequency diagram conversion to obtain an abnormal section; the abnormal section is actively monitored, piezoelectric driving and model construction are combined, the damage result of the tunnel lining is obtained, and the damage result comprises the damage position, the damage type and the damage degree. According to the invention, the problem that the existing periodic test is insensitive to the acquisition of the damage occurring at the period interval is solved.

The ultrasonic device for skin treatment, according to this invention, comprises of the external part consisting of the body of the device (2) where the middle of the body of the device (2) is installed with a light (3) for indicating the operation status of the device, the switch (4) for turning on and turning off the device and the mechanism parts which consists of the source of energy (6) that connects to the circuit control panel (7) contained with the short circuit detection circuit (8), the Bluetooth and / or Wi-Fi receiver and transmitter (9) and the skin temperature monitoring circuit (10). The circuit control panel (7) delivers the electric current to the electromagnetic electrodes (11), the electrical muscle stimulation electrodes (12) and the ultrasonic transducer (1) consisting of the deeper focal length ultrasonic transducer (17) and the shallower focal length ultrasonic transducer (13). Both of the transducers consist of the electrodes connecting to the piezo electric material for delivering the electricity to the piezoelectric material and the solid or semi-solid material such as polymer, metal or gel, which is ultrasonic transmittable for intensifying the ultrasonic wave into the desired skin layer. There is the temperature monitoring probe (21) near the ultrasonic transducer (1) which is connecting to the temperature monitoring circuit (8).

A piezo electric device having a configuration that can suppress the formation of a leakage path between electrodes that sandwich a piezoelectric layer and also reduce deterioration in the piezoelectric characteristics, is provided. The piezoelectric device has a first electrode, a piezoelectric layer, and a second electrode stacked in this order on a substrate. The first electrode and the second electrode are arranged so as not to overlap each other in the stacking direction.

The present invention discloses a method for measuring the flexoelectric coefficient of a separable piezoelectric two-dimensional material, comprising: testing N samples with different distance values ​​respectively, where the distance value is the distance from the thickness bisector of the two-dimensional material to the thickness bisector of the sample along the thickness direction of the base plate in one sample; since the distance value affects the strain state and piezoelectric polarization of the two-dimensional material, the flexoelectric contribution and the piezoelectric contribution are separated according to the total polarization difference of multiple samples, thereby accurately measuring the flexoelectric coefficient of the two-dimensional material.

In an example, the present invention provides a laser system. The laser system has a source laser (e.g., CBC) coupled to first mirror device opposing a second mirror device and configured to generate a resonating laser beam between the first mirror and the second mirror. In an example, the system has a piezoelectric device configured to the second mirror device and characterized by a refractive e index such that one or more voids is changed by applying an energy to the piezo electric device to cause a change in a value of the refractive index, e.g., by more than 0.0001, to allow the resonating laser beam or a portion of the resonating laser to traverse through a portion of the second mirror device.

The invention provides ferroelectric metal and a preparation method and application thereof. The ferroelectric metal is composed of cubic silicon carbide crystals and doping elements doped in the cubic silicon carbide crystals, and the concentration of the doping elements is larger than or equal to 1 * 10 < 18 > cm <-3 >. The material can be prepared by a chemical vapor deposition method, a high-temperature solution growth method, a solid-phase sintering method, a pulsed laser deposition method and the like. Due to the fact that the conductivity of metal, the switching characteristic of ferroelectricity and the force-electricity coupling characteristic of piezoelectricity are integrated at the same time, the ferroelectric metal has huge application value in the fields of high-performance transducers, high-sensitivity sensors, low-power-consumption micro-electro-mechanical systems (MEMS), next-generation multifunctional electronic devices and the like.

The invention discloses a test device for self-repairing monitoring of a bentonite liner of a landfill under multi-field coupling based on flexible piezoelectric sensing, which comprises a main body with a cavity, a first water outlet is arranged at the bottom of the main body, a water inlet and a second water outlet are arranged on the side wall of the main body, the water inlet and the second water outlet are oppositely arranged, and the second water outlet is higher than the water inlet. The water inlet is connected with a water supply part, a pressurizing part is arranged at the upper end of the main body towards the cavity, filler simulation pre-buried fields are laid in the main body layer by layer, piezoelectric monitoring parts are pre-buried in the simulation pre-buried fields, and the piezoelectric monitoring parts are used for monitoring the damaged bentonite liner repairing process in a simulation landfill and constructing a multi-field coupling environment. And the working condition of the bentonite liner in actual engineering is fitted, so that the self-repairing monitoring data has higher reference value, and the test authenticity is improved.

The invention belongs to the technical field of preparation of biological composite materials, and particularly discloses preparation and application of magnetically enhanced piezoelectric intelligent nanofibers. The preparation method comprises the following steps: dissolving lithium fluoride in hydrochloric acid to obtain an etching solution, etching Ta4AlC3, washing, centrifugally collecting precipitate, and carrying out ultrasonic treatment and low-temperature vacuum drying to obtain Ta-MXene powder. The preparation method comprises the following steps: dissolving ferric acetylacetonate and molybdenum acetylacetonate in oleic acid, carrying out heating reaction in an inert atmosphere, rapidly cooling to room temperature, adding absolute ethyl alcohol, stirring, washing, carrying out vacuum drying overnight to obtain Fe2MoO4 nanoparticles, mixing Ta-MXene powder and Fe2MoO4 in an oleic acid solution, carrying out in-situ growth, washing, and carrying out vacuum drying overnight to obtain the Ta-MXene-coated Fe2MoO4 composite material. And adding polyvinylidene fluoride particles, uniformly stirring, and carrying out solution spinning to obtain the intelligent nanofiber. The invention discloses preparation and application of magnetically-enhanced piezoelectric intelligent nanofibers. The intelligent nanofibers are high in antibacterial efficiency, capable of promoting healing in multiple modes, capable of achieving intelligent dynamic monitoring and excellent in biological safety.

A wearable device configured to provide haptic feedback to a user using integrated actuators is described. The wearable device includes a band structure configured to be worn on a portion of a user's body and a transducer assembly coupled to the band structure. The transducer assembly includes a piezoelectric substrate configured to displace in a first direction in response to a voltage a displacement amplifier coupled to the piezoelectric substrate. The displacement amplifier includes a first plate having a first end portion coupled to the piezoelectric substrate, a second plate having a first end portion coupled to the piezoelectric substrate, and a flexible joint coupling a second end portion of the first plate and a second end portion of the second plate. The flexible joint is configured to displace in a second direction different than the first direction in response to displacement of the piezoelectric substrate in the first direction.

A reverse transcriptase quantitative polymerase chain reaction based analyzing system includes a sampling tube. The sampling tube includes a tube portion, a cap coupled to the tube portion via a ratchet locking mechanism. The system comprises a microfluidic processing unit coupled to the sampling tube. An intake system receives pre-registered, sealed microfluidic labs into the system, and disinfects them before processing begins. The microfluidic processing unit comprises a piezo electric type ribonucleic acid extraction and concentration unit coupled to the sampling tube, an eluent storage unit, an eluate dosing chamber, an analysis settling chamber with a bubble removal area, an assay rehydration unit, an assay analysis unit and a no-target control analysis unit.

A wearable device configured to provide haptic feedback to a user using integrated actuators is described. The wearable device includes a band structure configured to be worn on a portion of a user's body and a transducer assembly coupled to the band structure. The transducer assembly includes a piezoelectric substrate configured to displace in a first direction in response to a voltage a displacement amplifier coupled to the piezoelectric substrate. The displacement amplifier includes a first plate having a first end portion coupled to the piezoelectric substrate, a second plate having a first end portion coupled to the piezoelectric substrate, and a flexible joint coupling a second end portion of the first plate and a second end portion of the second plate. The flexible joint is configured to displace in a second direction different than the first direction in response to displacement of the piezoelectric substrate in the first direction.

The application provides an alternating current line optimized power taking device for open-close type installation, piezoelectric elements are connected between two ends of a first magnetic conducting half ring and a second magnetic conducting half ring, the two piezoelectric elements are connected in series through a wire and are connected with a rectifier circuit; an insulating wire winding is wound on the second magnetic conducting half ring, one end of the insulating wire winding is short-circuited with the piezoelectric elements connected in series and is connected with a common ground end of the rectifier circuit, and the other end is connected with a rectifier input end of the rectifier circuit. The application also provides a power taking method of the alternating current line optimized power taking device for open-close type installation. The application adopts two magnetic conducting half rings to be suitable for open-close type installation, the two magnetic conducting half rings are connected through piezoelectric elements, the conversion of magnetism-piezoelectricity-electricity is used to improve the efficiency of alternating current line power taking, and the mechanical vibration of the magnetic conducting element caused by the magnetic piezoelectric effect can be reduced based on the magnetostriction effect and the piezoelectric effect, and then the demagnetization of the magnetic conducting element caused by the mechanical vibration is relieved.

The invention relates to the technical field of anchor rod monitoring, in particular to a piezoelectric-based tunnel anchor rod and a monitoring method.The piezoelectric-based tunnel anchor rod comprises an anchor rod body, and the anchor rod body comprises an anchor head, an anchor tail and a hollow anchor rod body; the piezoelectric sensing unit comprises a first piezoelectric module, a second piezoelectric module and a third piezoelectric module, the first piezoelectric module is arranged at the anchor tail, the third piezoelectric module is arranged at the anchor head, the second piezoelectric module is arranged in the middle of the hollow anchor rod, and the third piezoelectric module is arranged in the middle of the hollow anchor rod. According to the invention, integrated synchronous monitoring and effective distinguishing of two main failure modes of anchor rod body damage and interface bonding failure are realized, and the limitations in the prior art that long-term on-line monitoring of hidden engineering is difficult and a specific damage mode cannot be identified are overcome.

Aspects of the present disclosure relate generally to systems and methods for use in the implementation and / or operation of quantum information processing (QIP) systems, and more particularly, to various aspects of methods and systems for piezoelectric-based (or piezo-based) beam stabilization for cryogenic environments used in QIP systems.

The invention belongs to the technical field of MEMS devices, and relates to a piezoelectric MEMS-based low-frequency sonic sensor and detector and application thereof, the piezoelectric MEMS-based low-frequency sonic sensor comprises a silicon-based cantilever thin plate and a piezoelectric composite layer, the silicon-based cantilever thin plate comprises a silicon-based substrate and a cantilever layer, and a first cylinder is arranged on the surface of the silicon-based substrate; the side, close to the first column body, of the cantilever layer is provided with two cantilever beams which are divided out and arranged in parallel in the horizontal direction, and the two cantilever beams are fixedly connected with the side wall of the first column body. The piezoelectric composite layer is arranged on the upper surfaces of the two cantilever beams; the cantilever layer has a natural resonant frequency, the two cantilever beams generate resonant motion when receiving sound wave signals with the same natural resonant frequency, and the sound wave signals are transmitted to the piezoelectric composite layer to generate a piezoelectric effect, so that the sound wave signals are detected by measuring output voltages at the upper end and the lower end of the piezoelectric composite layer. The low-frequency sonic sensor is only sensitive to specific frequency signals, and has excellent frequency selectivity and anti-interference capability.

In an example, the present invention provides a laser system. The laser system has a source laser (e.g., CBC) coupled to first mirror device opposing a second mirror device and configured to generate a resonating laser beam between the first mirror and the second mirror. In an example, the system has a piezoelectric device configured to the second mirror device and characterized by a refractive e index such that one or more voids is changed by applying an energy to the piezo electric device to cause a change in a value of the refractive index, e.g., by more than 0.0001, to allow the resonating laser beam or a portion of the resonating laser to traverse through a portion of the second mirror device.

An energy harvesting system 50 comprises a transducer 100 arranged to provide an output signal in response to being deformed by an applied force, and a structure 200 in mechanical communication with the transducer. The structure is arranged to cause deformation of the transducer and comprises a first portion 210 which provides a contact surface, a second portion 220 in contact with the transducer, and one or more third portions 230 connecting the first and second portions. The one or more third portions comprise a region of varying thickness. The structure may have the form of a cymbal and the one or more third portions may taper away from the centre of the cymbal (figure 3). One or more apertures (250, figure 4) may be provided through the structure, and slots may be provided at an edge of the structure. The structure and / or transducer may have an annular cross-section. The transducer may be piezoelectric or magnetostrictive. The system may be used in a projectile or munition.