19 results about "Electrostriction" patented technology

The invention relates to the field of intelligent surfaces and flexible electronics, and discloses a light-emitting structure with intelligent touch and light-transmitting display functions and a control system.The light-emitting structure sequentially comprises a stress buffer layer, a touch function layer and a light-transmitting surface layer from inside to outside, and the stress buffer layer is provided with a micron-sized corrugated structure; flexible photoelectric display modules are integrated in the troughs; the touch function layer is made of an elastomer material containing a nanowire network, and a micro hydraulic tactile feedback unit is embedded in the touch function layer; the light-transmitting surface layer is provided with micro-nano textures and is used for generating diffuse reflection on ambient light and presenting matte texture when no light is emitted from the interior. Excellent flexible stretching and curved surface adaptability are achieved through the corrugated structure and the lap joint sliding conductive network, and accurate touch control is ensured; millisecond-level local physical touch is provided through an electrostriction driving hydraulic amplification principle; the invisible display effect is achieved in combination with the light-transmitting skin, and the problems of mechanical failure and tactile feedback deficiency in vehicle-mounted curved surface interaction are solved.

An electroseismic integrated monitoring method comprises: transmitting a current signal including at least one of: a multi-frequency current signal or a single-frequency current signal, the frequency of the current signal being determined according to a proppant, and the proppant performs telescopic vibration under excitation of the current signal at a predetermined frequency. An acoustic wave signal received by a seismic sensor. The acoustic wave signal is an acoustic wave signal generated for the current signal to excite the proppants to perform telescopic vibration. A vibration position of the proppant at a fracturing layer is determined according to the acoustic wave signal. The vibration position is used to determine a basis for propped fracture characteristics. An electrostrictive material is used as the proppant, so that the position of the proppant can be monitored by means of microseism.

This invention discloses a rapid self-healing waterproof and breathable membrane structure for electronic devices, belonging to the field of functional thin film materials and electronic device protection technology. The structure comprises, from top to bottom, an electrostrictive hydrophobic dynamic layer, a capillary self-pumping microchannel layer, and a piezoelectric sensing and support substrate. The electrostrictive hydrophobic dynamic layer is composed of an ion-conductive self-healing hydrophobic polymer, which can deform in response to electrical signals to repair damage. The capillary self-pumping microchannel layer contains a biomimetic fractal superhydrophilic microchannel network, which can directionally migrate intruding liquid water to the edges for drainage through capillary action. The piezoelectric sensing and support substrate is used to sense pressure differences and vibrations. Each layer is electrically connected to a micro-control system, forming an intelligent sensing-response system that can automatically monitor damage and trigger repair. This invention integrates self-healing, active drainage, and intelligent sensing, significantly improving the reliability and service life of the waterproof and breathable membrane in complex environments.

The invention relates to a bionic ionizing flexible pressure sensor and a preparation method thereof. The sensor adopts a capacitive structure and is composed of an upper electrode layer, a lower electrode layer and a unique bionic double-layer dielectric layer. Wherein the upper layer of the constructed bionic double-layer dielectric layer is a bionic spinous process dielectric layer referring to a cockroach tentacle spinous process structure, and is made of polyvinyl alcohol / phosphoric acid ion gel; the lower layer is an ion composite fiber dielectric layer referring to a presynaptic membrane bulge structure and a signal transmission mechanism, and is formed by soaking a structured fiber fabric in an ionic liquid (1-butyl-3-methylimidazolium tetrafluoroborate solution). The invention aims to solve the key technical problem that an existing flexible pressure sensor is difficult to maintain high sensitivity and stability at the same time in a wide dynamic pressure range, especially the bottleneck that the actual application of the flexible pressure sensor under a high-load working condition is restricted for a long time. The sensor realizes high sensitivity and stability in a wide dynamic pressure range by coupling the high-sensitivity sensing characteristic of the spinous process of the bionic cockroach, the bulge structure of the presynaptic membrane and a signal transduction mechanism. The sensor adopts simple and efficient manufacturing processes such as one-pot film forming, abrasive paper transfer printing and fiber impregnation, and has the potential of large-area manufacturing, and the manufacturing cost is remarkably reduced. The bionic ionizing flexible pressure sensor has a wide application prospect in the emerging fields of health monitoring, intelligent medical treatment, wearable equipment, human-computer interaction and the like.

The invention discloses an electrostatic driving electrocaloric refrigeration device and a preparation method, application and system thereof, and belongs to the technical field of thermal management. The device comprises a plurality of electrocaloric thin film elements, an electrode plate and a control unit. The electrocaloric film element is composed of a modified P (VDF-TrFE-CFE) film, a carbon nanotube positive electrode and an evaporated copper negative electrode; the electrode plates are used for applying an electrostatic field to drive the lamination to move; the control unit enables the electrostatic driving force and the electrodeformation force to be consistent in direction through cooperation of electrostatic driving and self-driving. The rigidity of the film is enhanced by evaporating the copper layer on the negative electrode, and uniform agitation and stable movement are realized. The device is compact in structure, large-temperature-difference thermal management can be achieved, the refrigeration temperature difference reaches 5K during no-load, cooling of about 49.7 DEG C compared with air cooling is achieved in an analog chip cooling test, and the device is suitable for the fields of microelectronic cooling, unmanned aerial vehicle thermal management and the like.

A diffraction element device includes a diffractive element and a power source, the diffractive element includes a substrate and a plurality of multi-step structures, each of the multi-step structures is composed of a plurality of steps, an electrode is provided at a part of the multi-step structures, a piezoelectric material or an electrostrictive material is included in a part of the multi-step structures, the power source is connected to the electrode or the substrate, and a height of the multi-step structures changes due to a voltage applied from the power source.

The present application relates to the technical field of material, and discloses a method for enhancing the electrostriction of sodium bismuth titanate-based relaxor ferroelectric.The present application induces the original large-size non-percolating polar region in the percolating sodium bismuth titanate-based relaxor by pre-polarizing the sodium bismuth titanate-based relaxor ferroelectric ceramic near the critical position synthesized by the traditional solid-phase method, reduces the nucleation barrier in the field-induced strain process, and significantly enhances the electrostriction effect.The sodium bismuth titanate-based relaxor ferroelectric ceramic of the present application has obviously improved electrostriction under the excitation of 60 kV / cm electric field compared with the initial state, and has more excellent performance than the ordinary sodium bismuth titanate-based relaxor ferroelectric ceramic.

The invention discloses a P (VDF-TrFE)-based homologous copolymer high sensitivity and driving integrated device and a preparation method thereof, the sensitivity and driving integrated device comprises an electrostriction layer, a piezoelectric sensing layer and a glue layer, and the glue layer integrates the piezoelectric sensing layer and the electrostriction layer; the piezoelectric sensing layer is consistent with the electrostriction layer in width and smaller than the electrostriction layer in length. When a driving input voltage is applied to the electrostriction layer, an electrostriction layer material is excited by an electric field to deform, deformation of the electrostriction layer induces a piezoelectric sensing layer material to deform, bound charges are generated on the surface of the piezoelectric sensing layer material, and the bound charges are converted through a signal collector to obtain a piezoelectric output voltage signal. Therefore, sensing monitoring of deformation of the electrostriction layer is realized. The problem of inconsistency of traditional separated sensing and driving information is effectively avoided, and the sensing, driving and control stability of the soft robot can be greatly improved.

The present description relates to a multilayer device comprising an electroactive stack (100) comprising at least three electroactive layers (103), at least two of the electroactive layers (103) differing from one another by at least one of the parameters selected from thickness, Young's modulus, piezoelectric coefficient, and electrostrictive coefficient.

The utility model belongs to the technical field of material characteristic parameter measurement, and relates to an electrostriction coefficient measuring device based on a loyd mirror interference method, which comprises a light source used for emitting laser and enabling the laser to be incident to a reflecting mirror at a grazing incidence angle; the power supply is used for applying voltage to the to-be-tested sample to change the deformation quantity of the to-be-tested sample; the supporting block and the to-be-detected sample are positioned on the same horizontal plane; the reflector is placed on the surfaces of the to-be-tested sample and the supporting block, one end is in contact with the to-be-tested sample, and the other end is in contact with the supporting block; the laser reflector is used for reflecting the laser, outputting a first reflected light beam before the deformation quantity of the to-be-detected sample is changed, and outputting a second reflected light beam after the deformation quantity is changed; the optical screen is used for generating first interference fringes and second interference fringes based on interference light of the first reflection light beam, the second reflection light beam and the laser; the image processing module is used for amplifying the first interference fringes and the second interference fringes; and the upper computer is used for obtaining an electrostriction coefficient based on the first interference fringes and the second interference fringes.

The utility model discloses an intelligent regulation and control automobile lamp which comprises a lamp shell, a far and near integrated lamp chamber is arranged in the lamp shell, an electro-deformation light guide layer is arranged at the bottom in the far and near integrated lamp chamber, the electro-deformation light guide layer is made of silicon-based flexible materials, and the electro-deformation light guide layer deforms through current signals and changes the light refraction angle. A fog lamp chamber is arranged on the right side of the far and near integrated lamp chamber, an installation groove protruding outwards is formed in the fog lamp chamber, light uniformizing strips are evenly arranged on the periphery of the installation groove at intervals, C-shaped reflecting plates are arranged on the periphery of the fog lamp chamber, an L-shaped positioning plate is arranged on the outer side of the bottom of the lamp shell, and grid-shaped positioning strips are arranged on the outer surface of the positioning plate. Millisecond-level light type switching is achieved through the electrically-induced deformation light guide layer, the performance of the fog lamp is improved innovatively through the light uniformizing strip and reflecting plate composite structure, the penetrating power of the fog lamp is higher, and the installation precision problem is solved in cooperation with a gridding positioning system.

This invention discloses an electrolytic cell electrode with an integrated in-situ perturbation device and its preparation method. The electrolytic cell electrode includes a substrate layer, an electro-actuated perturbation layer disposed above the substrate layer, and a catalytic wetting layer disposed above the electro-actuated perturbation layer. The electro-actuated perturbation layer is composed of several electrostrictive microbeams, which are fixed to the substrate layer and do not cover the pores in the substrate layer. Each electrostrictive microbeam consists of a fixed part and a driving part connected to the fixed part. The fixed part is used to fix the microbeams to the substrate layer, while the driving part is suspended above the substrate layer and vibrates under the action of a pulsed current, with the vibration direction perpendicular to the plane of the substrate layer. This invention integrates the electro-actuated microbeam array with the electrode body, eliminating the need for an external drive. This saves space and avoids problems such as energy consumption, sealing failure, and leakage short circuits caused by separate designs, making it suitable for high-density, miniaturized electrolysis systems.

The invention discloses a four-arm symmetrical structure electric-magnetic-mechanical energy combined acquisition device and method suitable for a non-intrusive voltage sensor, and belongs to the technical field of multi-source energy acquisition. The device is composed of a base, a fixed restraining rod and four piezoelectric cantilever beams, the four cantilever beams are distributed in the X-axis direction and the Y-axis direction respectively, a four-arm symmetrical structure is formed, and electromagnetic disturbance signals in multiple directions can be responded at the same time. The cantilever beam comprises a magnetic-mechanical-electric coupling energy-taking cantilever beam and an electric-mechanical-electric coupling energy-taking cantilever beam which are respectively integrated with a magnetostrictive material and a dielectric elastomer, and are superposed with a piezoelectric crystal and a spring steel sheet, so that external electric field or magnetic field energy is converted into mechanical energy through a magnetostrictive or electrostrictive effect; and the piezoelectric crystal converts the electric energy into electric energy for output. The device is compact in structure and sensitive in response, can efficiently collect stray electromagnetic field and environment vibration energy in a power system, and provides stable self-powered support for a non-intrusive electric field sensor.

The invention relates to the technical field of terminals, and discloses a wiring terminal with an anti-oxidation function, which comprises an end tube and a wire hole formed in the center of the end tube, the arc-shaped flitch plates are uniformly clamped on the inner wall of a wire hole of the end tube, the inner side surface of each arc-shaped flitch plate is designed into a stepped binding surface, micro electrostrictive ceramics are uniformly distributed on the surface of the stepped binding surface, the diameter of the stepped binding surface is gradually reduced along the wire inlet direction of the end tube, and the edge of the stepped binding surface is designed into an arc chamfer; the elastic buffer pad is arranged between the wire hole of the end pipe and the arc-shaped flitch plate, and the elastic buffer pad is tightly attached to the inner circumferential surface of the wire hole of the end pipe and the outer circumferential surface of the arc-shaped flitch plate; according to the wiring terminal, high-frequency micro-vibration can be generated through electrification of the micro-electrostrictive ceramic to break an oxide layer, the stability of contact resistance is maintained, local overheating burning is avoided, the stepped binding surface guides a wire to be centered, uniform contact is ensured, and the arc chamfer prevents the wire from being scratched.

The utility model relates to the technical field of projection screens, and particularly discloses an electric stay wire curtain device which comprises a controller, a suspension box, a first end cover, a second end cover, a bottom cover, a curtain and a tubular motor. The controller is installed on the hanging box, the first end cover and the second end cover are arranged at the two ends of the hanging box respectively to form a curtain bin, and a curtain telescopic hole is formed in the bottom of the hanging box. The two ends of a rotating shaft of the tubular motor are sleeved with a first mounting head and a second mounting head correspondingly. The two side edges of the curtain are respectively provided with a pull wire which cooperates with the bending of the curtain. A tension sensor is arranged on the pull wire, and the controller is electrically connected with the tension sensor and the tubular motor; a self-repairing protective coating is arranged on the surface of the curtain, an electrostriction layer is arranged on the back face of the curtain, and infrared positioning marks are arranged on the edge of the curtain. The problems that a projection screen surface of an existing projection screen is prone to damage, the projection contrast ratio is low, and dynamic tension of a pull wire is unbalanced are solved.

The application provides a low-frequency magnetic field detection system based on a hollow sphere cavity, and high-sensitivity low-frequency magnetic field information detection can be realized by measuring a to-be-detected low-frequency signal superimposed on a high-frequency modulation signal. The frequency of the high-frequency modulation signal is consistent with the mechanical mode of the cavity, the structure parameters of two hollow sphere cavities on the left and right sides of the three hollow sphere cavities are changed through an electrostrictive medium, the mechanical mode of the sensing unit is changed, and the sensing unit has stronger low-frequency magnetic field detection capability. The advantage of the system is that tuning the mechanical mode frequency does not change the optical quality factor of the hollow sphere cavity where the light field transmission is located, so that the sensitivity of the sensing system is not reduced due to the regulation of the mechanical mode frequency. The application provides a new technical means for optical resonant cavity low-frequency magnetic field detection.

The invention discloses a quick assembling and disassembling device for a double-taper-sleeve rolling bearing and an assembling, disassembling and dynamic compensation method of the quick assembling and disassembling device. According to an inner taper sleeve of the device, reliable locking of a rolling bearing-connecting ring overall unit relative to a shaft is achieved through a self-tightening structure consistent with the rotating direction of the shaft, and the rolling bearing-connecting ring overall unit can be kept stable without additional control; the outer taper sleeve acts between the outer ring of the rolling bearing and the supporting piece through the locking disc, and a closed-loop adjusting loop is formed by combining the outer taper sleeve with the pressure sensor and the electrostriction execution unit, so that real-time monitoring and dynamic compensation of the locking force are achieved. When it is detected that the locking force is insufficient, the electrostriction unit pushes the locking disc to be tightened, and the pre-tightening force is supplemented; when the locking force is too large, the electrostriction unit contracts and is properly released, and damage to parts is avoided. The device realizes overall quick disassembly and assembly of the bearing through a double-taper-sleeve layered structure, guarantees the locking stability in the operation process by combining with automatic compensation control, has the advantages of compact structure, high assembly and disassembly efficiency and high operation reliability, and is suitable for power machinery and industrial occasions where bearings need to be frequently replaced.

This invention discloses an electro-engraving head assembly for an electro-engraving machine, relating to the field of electro-engraving technology. It includes a controller and sequentially fixedly connected components: a cutter head section, a support section, a drive section, and a drive block. Sensor strips made of fiber Bragg gratings are fixedly connected within the cutter head section, support section, and drive section. Three sliding pads arranged in a circular array are slidably connected to the outer ends of both the cutter head section and the support section. An adjusting pad is fixedly connected to the end of each sliding pad away from the axis of the cutter head section. An adjusting ball head is provided at the outer end of the support section, connected to a ball head support ring via a ball joint and then to a drive bracket. The drive block and adjusting pads are made of piezoelectric or electrostrictive materials and are electrically connected to the controller. This invention achieves high-precision engraving, real-time status monitoring, and intelligent response adjustment through a multi-layered real-time monitoring network, a multi-dimensional precise adjustment system, and a functional partition design.

The present application relates to a kind of PZT-based piezoelectric ceramic material with large electric strain under low electric field and high Curie temperature and its preparation method.The chemical composition of the PZT-based piezoelectric ceramic material is: Pb 1‑2n‑1.5x La x Sr n Ba n (Zr y Ti 1‑y )O3-zwt%Sn, wherein 0.004≤x≤0.007, 0.52≤y≤0.6, 0.3≤z≤0.7, 0.01≤n≤0.04.The preparation method of the PZT-based piezoelectric ceramic material includes the following steps: (1) batching; (2) calcination; (3) granulation; (4) plastic, sintering.