300 results about "Piezoelectricity" patented technology

The invention discloses a high-linearity dynamic and static pressure flexible sensor based on Gaussian height distribution. The high-linearity dynamic and static pressure flexible sensor comprises a packaging layer, an upper electrode layer, a piezoelectric layer, a common electrode layer, an insulating layer, a lower electrode layer and a substrate layer which are sequentially stacked from top to bottom, the piezoelectric layer comprises a plurality of PVDF micro-columns, the top ends of the PVDF micro-columns are fixedly connected with the upper electrode layer, the bottom ends of the PVDF micro-columns are provided with micro-electrode layers, and the height of the PVDF micro-columns is of a Gaussian distribution structure from the center to the periphery; the common electrode layer is provided with a plurality of micro-column through holes which are completely overlapped with the PVDF micro-columns; the output leads of the upper electrode layer and the common electrode layer output piezoelectric signals corresponding to dynamic pressure, and the output leads of the common electrode layer and the lower electrode layer output capacitance signals corresponding to static pressure. According to the invention, the dynamic pressure is measured by using the piezoelectricity of PVDF, synchronous measurement of static pressure is realized through a Gaussian distribution structure of a plurality of PVDF micro-columns, and high-sensitivity and high-linearity output of dynamic and static pressure measurement signals is realized.

The invention discloses a plasma hydrodynamic cavitation aeration coupled piezoelectric catalysis organic wastewater treatment system and method. The system comprises a wastewater tank, a water pump, a Venturi tube hydrodynamic cavitator, a catalytic oxidation reactor, a piezoelectric particle separator, a piezoelectric catalytic particle bin, a low-temperature plasma generator and an air pump. By coupling piezoelectric catalysis, pressure pulsation mechanical energy generated by hydrodynamic cavitation is converted into chemical energy for driving the piezoelectric effect, on one hand, pollutants are directly oxidized, and on the other hand, plasma by-product H2O2 is efficiently converted into. OH with strong oxidizing property, so that cooperation with plasma advanced oxidation is formed, and the pollutant removal efficiency is improved. The pollutant degradation energy efficiency and the energy utilization rate of the system are greatly improved. Meanwhile, the system realizes efficient recovery and cyclic utilization of the magnetic piezoelectric catalytic particles through the magnetic separation type piezoelectric particle separator, so that secondary pollution of the catalyst is fundamentally avoided.

The utility model relates to the technical field of electronic components, and discloses a stacked piezoelectric ceramic electrode, which comprises an upper insulating layer and a lower insulating layer, a piezoelectric component is mounted in the upper insulating layer, an insulating layer is fixedly connected outside the upper insulating layer, a leading-out component is mounted outside the upper insulating layer, and a lead-out pin is fixedly connected outside the leading-out component. The exterior of the upper insulating layer is fixedly connected with a fixed plate; the piezoelectric assembly comprises a positive electrode layer, the positive electrode layer is fixedly connected to the interior of the upper insulating layer, the exterior of the positive electrode layer is fixedly connected with a piezoelectric ceramic material film, and the exterior of the piezoelectric ceramic material film is fixedly connected with a piezoelectric ceramic piece. According to the utility model, under the direct piezoelectric effect, the multi-layer structure piezoelectric ceramic piece, the piezoelectric ceramic material film and the plurality of piezoelectric dielectric layers can more efficiently convert external weak mechanical force into electric signals and generate obvious charge change, so that the electric charge is accurately detected, and the sensitivity of the sensor is greatly improved.

The invention belongs to the field of biological medicine and material science, and particularly relates to an intelligent response type piezoelectric nanofiber dressing and a preparation method and application thereof. According to the preparation method, polyvinylidene fluoride-trifluoroethylene, a high polymer material and inorganic nanoparticles are blended and spun through an electrostatic spinning technology, and then a photo-thermal component coating is subjected to surface in-situ oxidation and self-polymerization, so that the composite fiber membrane is prepared. Under the stimulation of ultrasound (US) and near-infrared laser (Laser), the fiber membrane can cooperatively activate the piezoelectric effect and the photothermal effect, generate a dynamic electric field and local high temperature, realize multi-mode cooperative killing of bacteria (the antibacterial rate exceeds 99%), and simulate an endogenous electric field to promote cell migration and wound healing. The dressing has good mechanical properties (the Young modulus is 15-20 MPa), hydrophilicity (the contact angle is about 30 degrees), biocompatibility and stability, is suitable for treatment of chronic infected wounds such as diabetes mellitus and the like, and has the advantages of on-demand activation and intelligent response.

A sacroiliac (SI) joint implant assembly addresses SI joint dysfunction and degenerative sacroiliitis. The assembly includes a first implant body, a second implant body, and a piezoelectric layer positioned between them. The piezoelectric layer generates electrical charges when subjected to mechanical stress, stimulating bone growth and enhancing stability of the SI joint after surgery. The implant bodies may feature non-planar surfaces to distribute compressive and shear forces unevenly across the piezoelectric layer. The assembly can be secured using fasteners such as screws, pins, or brackets, and may include porous or fenestrated bodies made from materials like titanium or polymers. Some implant assemblies are designed for minimally invasive surgical procedures, with configurations that allow for precise placement using guide wires and imaging techniques. The assembly aims to stabilize the SI joint and promote bone fusion, leveraging the piezoelectric effect to improve the overall efficacy of the fusion procedure.

The invention discloses a sensing unit structure of a piezoelectric-piezoresistive coupling type electric field sensor and application, the sensing unit structure comprises a substrate, the substrate is provided with a cantilever beam structure, a piezoelectric crystal block is bonded between the lower surface of the cantilever beam structure and the upper surface of the substrate, and the upper surface of the cantilever beam structure is provided with a Wheatstone full-bridge structure; when the piezoelectric crystal block is subjected to the action of an electric field, the piezoelectric crystal block deforms in the Z-axis direction under the action of an inverse piezoelectric effect, so that the cantilever beam structure deforms; in the Wheatstone full-bridge structure, the resistors arranged at the position with the maximum stress difference value are stressed to deform, the stress directions of the resistors are opposite, and the resistance values of the resistors are changed oppositely; compared with the sensing unit structures of electro-optical and mechanical electric field sensors commonly used at present, the sensing unit structure has the advantages of larger measuring range, smaller volume, lower power consumption and easiness in mass production.

The invention relates to the technical field of energy storage materials, and provides a composite solid polymer electrolyte membrane and a preparation method thereof.The composite solid polymer electrolyte membrane is prepared through the steps that a polymer matrix serves as a matrix, a polar solvent is adopted for dissolving to form a pure polymer solution, then lithium salt and nematic phase liquid crystal E7 are added, a chiral dopant can also be added, uniform printing slurry is formed, and the composite solid polymer electrolyte membrane is obtained through 3D printing. And carrying out hot pressing treatment to prepare the composite solid polymer electrolyte membrane. The electrolyte membrane prepared by the invention has a controllable porous structure, a high dielectric constant and excellent piezoelectricity and energy storage performance, complex structures such as a three-dimensional grid and a porous structure can be directly printed, and the thickness and shape of the membrane can be accurately controlled by adjusting parameters such as a printing path, a layer height and filling density; the method is very suitable for the requirements of rapid customization of product shapes and sizes in the fields of flexible electronics, wearable equipment and the like. The invention also provides an application of the composite solid polymer electrolyte membrane prepared by the method in an energy storage device.

The invention discloses an application of a chiral polylactic acid piezoelectric material doped polyaniline composite friction film in degradation of organic pollutants. The application specifically comprises the following steps: adhering the chiral polylactic acid piezoelectric material doped polyaniline composite friction film to the bottom of a turntable, and adhering a friction bottom sheet to the bottom in a flat-bottom container; the organic pollutant solution is poured into the container, the rotating disc adhered with the friction film is placed in the container for equilibrium adsorption, and one side of the friction film faces upwards; the turntable is turned over to enable one side of the friction film to face downwards to form a friction pair with the friction bottom plate, and the turntable is started to rotate for friction catalysis to realize degradation of organic pollutants. The conductivity of polyaniline is combined with the piezoelectric and chiral characteristics of chiral polylactic acid, a flexible friction film is obtained through a solution casting method, the flexible friction film and a friction bottom form a friction pair, active free radicals are generated through the triboelectric effect, high-concentration organic pollutants are efficiently degraded, and environment-friendly and efficient pollutant degradation at normal temperature and pressure is achieved.

The invention discloses a device for converting mechanical energy into electric energy, relates to the technical field of energy collection, and aims to solve the problems of unbalanced voltage and current output characteristics and low energy recovery efficiency in the traditional single-mode energy capture technology. Mechanical vibration is converted into electric energy through the direct piezoelectric effect; an electromagnetic energy harvesting module is further arranged in the shell, and electricity is generated according to the electromagnetic induction principle; the frequency self-tuning mechanism is connected with the electromagnetic energy harvesting module and is used for adaptively adjusting the frequency response range of the electromagnetic energy harvesting module according to the vehicle speed and the road condition change; the energy collection circuit board is connected with the output end of the piezoelectric energy harvesting module and the output end of the electromagnetic energy harvesting module and used for converting collected alternating current into stable direct current. Through a piezoelectric and electromagnetic composite structure, collaborative improvement of output voltage and current is achieved, the frequency response range is widened through the frequency self-tuning mechanism, and self-adaptive efficient energy capture of broadband vibration is achieved.

The invention discloses an intelligent electric pole based on bionics, and relates to the technical field of power transmission and transformation facilities. The carbon fiber cloth strip spirally surrounds the electric pole main body and is provided with a through hole; the ends of the shape memory wires penetrate through the through holes of the adjacent carbon fiber cloth strips and are fixed; the strain sensing mechanism is arranged on the carbon fiber cloth strip and is a piezoelectric effect device; the energy storage module is electrically connected to the strain sensing mechanism; the data transmission module is electrically connected to the strain sensing mechanism and the energy storage module; the plurality of carbon fiber cloth strips are provided with joint lines which alternately bypass the front and back surfaces to be connected side by side, and each carbon fiber cloth strip is provided with a plurality of through holes which are arranged along the length direction of the carbon fiber cloth strip; the strain sensing mechanism comprises a plurality of piezoelectric effect elements. The anti-damage electric pole has the effects of improving the anti-damage capability of the electric pole in long-term use and reducing the reinforcing and repairing expenditure.

The invention discloses a preparation method and application of dual-network piezoelectric induction hydrogel with a piezoelectric effect, and the method comprises the following steps: taking ACG and GelMA as base materials, taking MBA as a cross-linking agent, cooperating with a photoinitiator, and carrying out free radical polymerization to form a precursor solution; and adding BTO nanoparticles, mixing, and curing to obtain the hydrogel. According to the hydrogel disclosed by the invention, the mechanical property and the structural stability of the material are remarkably enhanced through a double-network structure, and the defects that traditional hydrogel is prone to excessive deformation and insufficient in mechanical property are overcome; by introducing a functional component with piezoelectric property, the material can generate a stable electric signal under the action of external force, the local electrophysiological environment of a wound surface is improved, cell proliferation, migration and angiogenesis are promoted, and tissue repair is accelerated; the anti-infection function can be further achieved while electrical regulation and control are achieved, the limitation of a single drug loading or passive protection strategy is avoided, drug resistance and toxic and side effect risks are reduced, and the synergistic effect of antibiosis and regeneration is achieved.

A kind of in-situ monitoring device and method of suspended solids concentration based on piezoelectric effect, including spherical sensor, flow rate measuring unit, signal processing unit and power supply and data transmission unit.Spherical sensor built-in piezoelectric ceramic sheet, its impact surface is directly exposed to water flow, protected by sealed shell;Flow rate measuring unit synchronously acquires real-time flow rate by external speed measuring device, and with piezoelectric ceramic sheet is kept within the preset interval.Signal processing unit processes the charge signal generated by piezoelectric ceramic sheet to obtain total electric signal, extracts the pure water flow reference signal corresponding to current flow rate based on pre-stored bivariate calibration database, deducts flow rate coupling component from total electric signal to calculate suspended solids exclusive signal, and then inverses concentration through function model.Power supply and data transmission unit supplies power, and transmits concentration data to external equipment through wired or wireless mode.The device solves the problems of traditional technology, such as complex operation, easy to be disturbed, etc., and is suitable for long-term in-situ monitoring of water body suspended solids concentration.

The invention discloses a motor and piezoelectricity integrated automobile brake execution device and a control method. A motor driving mechanism comprises a driving motor and a lead screw nut mechanism, and rotary motion is converted into linear motion so as to push a first friction block to establish basic brake force; the piezoelectric driving mechanism comprises a piezoelectric ceramic unit and a displacement amplifying mechanism, the piezoelectric ceramic unit is elongated when voltage is loaded, the connecting end is driven to get close to the middle, only pressure maintaining or pressure reducing rapid adjustment of braking force is achieved, and the capacity of independently applying the braking force is not achieved. Through cooperative work of motor main braking and piezoelectric rapid adjustment, the large-thrust long-stroke braking capacity and the microsecond-level dynamic adjustment performance are both considered, the redundant fault-tolerant capacity is achieved under multi-device distributed layout, and the brake-by-wire system is suitable for L3-level and above automatic driving vehicles; and meanwhile, upgrading and reconstruction of brake systems of traditional fuel vehicles and pure electric vehicles are compatible.

The utility model discloses a chemical pump for chemical safety production, which comprises a pump body, the output end of the pump body is connected with a first U-shaped pipe, the two ends of the first U-shaped pipe are connected with filters, the interiors of the two filters are provided with filtering assemblies, and the filtering assemblies comprise sealing seats which are respectively connected with the interiors of the corresponding filters in a sliding mode. Mounting frames are inserted into the two sealing seats; the piezoelectric ceramic vibrator generates vibration based on the piezoelectric effect after being electrified, the vibration is transmitted to the filter plate through the vibration frame, and meanwhile, the buffer spring of the elastic part is matched with the filter plate for resonance, so that the filter plate can effectively shake off impurities, filtering and cleaning are synchronously carried out, shutdown is not needed, and the working efficiency is improved. The filter plate prevents impurities from being accumulated and blocked on the filter plate, ensures continuous and stable work of the chemical pump, greatly improves the filtering efficiency, ensures the continuity of the chemical production process, reduces the production interruption caused by equipment failure, and reduces the production cost.

The invention relates to the technical field of acoustic wave device application and biological tissue engineering, in particular to a method for constructing a multi-component heterogeneous fiber structure under the assistance of acoustic tweezers. According to the method, an acoustic tweezers technology and a microfluidic spinning technology are combined, an electric signal is converted into an acoustic surface wave through the piezoelectric effect of a piezoelectric material, and a beam-shaped acoustic standing wave field is formed in a microchannel of a specific structure; different target cells form a stable fiber configuration under the interaction of microchannel limitation and acoustic radiation force, and spatial precise classification and arrangement of multiple types of cells are realized. The low-temperature-sensitive hydrogel is introduced in the cell injection process, and the fiber scaffold is formed after ultraviolet curing, so that the fiber structure of the cells is still maintained after the sound field is removed. The cells treated by the surface acoustic wave can form a complex three-dimensional bionic tissue structure more easily, and the cell viability is remarkably improved. Various fiber structures can be formed by regulating and controlling sound field parameters, and great potential is shown in the field of in-vitro barrier model construction.

A sensitive unit structure of a piezoelectric-piezoresistive coupled electric field sensor and application, comprising a substrate, a cantilever beam structure is arranged on the substrate, a piezoelectric crystal block is bonded between the lower surface of the cantilever beam structure and the upper surface of the substrate, and a Wheatstone full-bridge structure is arranged on the upper surface of the cantilever beam structure; when the piezoelectric crystal block is subjected to the action of an electric field, the piezoelectric crystal block generates deformation along the Z-axis direction under the action of the inverse piezoelectric effect, so that the cantilever beam structure is deformed; in the Wheatstone full-bridge structure, the resistors arranged at the positions with the maximum stress difference generate deformation under stress, the stress directions of the resistors are opposite, and the resistance value changes are opposite; compared with the commonly used electric field sensor sensitive unit structures such as the electro-optic type and the mechanical type, the present application has the advantages of a larger range, a smaller size, lower power consumption and easy mass production.

The application provides a one-dimensional heterojunction mechanoluminescence material, a preparation method and application thereof, and relates to the technical field of preparation of the mechanoluminescence material. 2+ A ZnO / ZnS:Mn heterojunction structure with clear interfaces and built-in electric fields is constructed in the material 2+ . The material prepared by the above method can be driven by the piezoelectric effect and the built-in electric field of the heterojunction under mechanical stress, so that carrier separation and radiation recombination are efficiently driven, and thus the mechanoluminescence is enhanced. After the above material is coupled with a photosensitizer, the photosensitizer can be directly activated by the light generated by daily mechanical stimulation such as tooth brushing, so that the "mechanical-light-chemical" tooth whitening without external power supply is realized.

The invention discloses a multi-rotational-degree-of-freedom piezoelectric stick-slip driving platform and a working method thereof. The driving platform comprises a stick-slip mechanism, a fixed seat, a lifting assembly, a circular ring and a rotating assembly. Wherein the stick-slip mechanism is a driving mechanism of the driving platform and converts electric energy into mechanical energy based on the inverse piezoelectric effect. The fixing seat is a main body structure of the multi-rotational-degree-of-freedom piezoelectric stick-slip driving platform, and the lifting assembly and the rotating assembly are both installed on the fixing seat. Wherein the lifting assembly is used for driving the ring to lift or turn over, and the rotating assembly is used for driving the ring to rotate. The circular ring can be driven to integrally ascend and descend through the lifting assemblies, and the circular ring can also deflect by differently adjusting voltage excitation on the lifting assemblies. The circular ring can be driven to rotate through the rotating assembly. Therefore, after the lifting assembly and the rotating assembly are combined, the circular ring has moving freedom degrees in multiple directions, and multi-dimensional movement is achieved. The invention relates to the technical field of micro drivers.

According to the vibration excitation and permeation enhancement method and system for the geothermal in-situ power generation system, the multi-layer piezoelectric vibrator array is implanted into the drill hole of the geothermal reservoir and packaged in the closed container filled with the supercritical working medium, and the phased array technology is used for applying the accurate sweep frequency signal to excite thermo-acoustic resonance; a controllable microcosmic fracture network is generated in the rock mass to enhance the permeability of the rock mass; meanwhile, the system directly utilizes the piezoelectric effect to convert rock mass vibration mechanical energy into electric energy, and monitors and adjusts the crack expansion state in real time by means of the resonance wave self-sensing function. Therefore, the integrated effect of efficient, low-cost and low-environmental-risk geothermal permeation enhancement and in-situ power generation can be achieved without traditional fracturing fluid and large pumping heat exchange equipment, the geothermal exploitation process is simplified fundamentally, and the energy conversion and resource recovery efficiency is improved.

The application relates to a high-thermal-conductivity fluorine-containing polymer piezoelectric film, which comprises a fluorine-containing polymer with a piezoelectric effect and isocyanate surface-modified montmorillonite, and the mass ratio of the fluorine-containing polymer to the montmorillonite is (50-95):(5-50). The fluorine-containing polymer piezoelectric film not only effectively improves the thermal conductivity and reduces the thermal resistance, but also is highly oriented and has more excellent electric insulation performance, and can be widely applied to capacitors, refrigeration, sensing and other fields.

The application relates to a method of an electric field sensor based on an optoelectronic oscillator, belonging to the field of optical devices and optical fiber sensing. The device comprises a laser source, a polarization controller, a phase modulator, a fiber Bragg grating with an acrylate glue cavity, a stacked piezoelectric ceramic, an electric field generator, an erbium-doped fiber amplifier, a photodetector, a power divider and an electric amplifier. The stacked piezoelectric ceramic is combined with the fiber Bragg grating with the acrylate glue cavity as a sensing head, the wavelength change of the fiber Bragg grating with the acrylate glue cavity caused by the piezoelectric effect is mapped to the frequency change of the microwave signal generated by the optoelectronic oscillator, and the electric field change value can be obtained by monitoring the microwave signal of the optoelectronic oscillator. In the loop of the optoelectronic oscillator, the electric spectrum analysis technology is used for demodulation, and high-speed and high-resolution electric field measurement can be obtained. The method has the advantages of simple structure, high measurement sensitivity and easy practicability.

This application discloses a two-dimensional germanium-based perovskite ferroelectric semiconductor material, its preparation method, and its applications, belonging to the field of materials science. The molecular formula of the two-dimensional germanium-based perovskite ferroelectric semiconductor material is [CH3(CH2)]. n The molecule is NH3]2CsGe2I7, where n = 2, 3, or 4. This material possesses excellent physicochemical properties, such as semiconductor characteristics, ferroelectricity, and piezoelectricity. The preparation method of this invention allows for the preparation of this material using a simple solution method at low cost. This material has potential applications in ferroelectric, optoelectronic, and other fields.

The invention discloses a multi-stage electro-hydraulic steering system with an energy recovery function and an anti-rollover control method of the multi-stage electro-hydraulic steering system. The multi-stage electro-hydraulic steering system comprises a mechanical transmission module, a variable-transmission-ratio multi-stage electro-hydraulic power assisting module, a vibration energy recovery module and an active steering controller module. Vibration of the power cylinder shell can be effectively restrained and relieved by combining piezoelectricity; whether vibration energy is converted into usable electric energy or not can be determined according to the specific working state. When the vibration condition of the shell of the power cylinder is slight, electric energy conversion can be selected not to be performed temporarily, and only the piezoelectric technology is used for relieving vibration, so that stable operation of the power cylinder is ensured as a primary target; when the shell of the power cylinder vibrates strongly and other parts of the equipment or the external environment has the requirement for electric energy, the vibration energy can be efficiently converted into usable electric energy through the vibration energy recovery module at the moment, reasonable utilization and recovery of energy are achieved, and the energy utilization efficiency of the whole system is improved.

The utility model relates to the technical field of ceramic capacitors, in particular to a multilayer ceramic capacitor. A plurality of layers of stacked suspension electrodes for resisting deformation are arranged between a plurality of adjacent parallel-plate capacitors, and the capability of resisting the inverse piezoelectric effect of the central area of the capacitor is enhanced through the toughness and the strength of the suspension electrodes, so that the failure probability caused by the inverse piezoelectric effect in the use process of the capacitor is greatly reduced; the suspension electrode is arranged in the middle area in the height direction of the capacitor, so that the anti-deformation capability of the area with the maximum deformation degree can be greatly improved, and the stability of the capacitor in the using process is improved; and the phenomenon that the existing high-voltage and high-capacitance multilayer ceramic capacitor is easy to fail due to the inverse piezoelectric effect in the use process is improved.

The invention discloses a two-dimensional metal phosphorus chalcogenide piezoelectric catalyst and preparation and application thereof.The catalyst comprises a block material and a two-dimensional nanosheet obtained through ultrasonic stripping of the block material, and the two-dimensional metal phosphorus chalcogenide piezoelectric catalyst has a piezoelectric effect, can capture environmental mechanical energy such as water flow, ultrasonic waves and wind energy and drives a piezoelectric catalytic reaction to convert nitrate into ammonia. The material is prepared by combining vacuum chemical vapor transport with an ultrasonic stripping method, and the material with high quality and good stability can be synthesized in batches. During application, the catalyst is dispersed in water or integrated into a film, and nitrate pollutants in sewage can be efficiently converted and ammonia is synchronously generated under the action of mechanical energy such as ultrasound, stirring or water flow fluctuation. The process is simple and reliable, and a feasible new technical path is provided for realizing nitrate pollution abatement and green synthesis of ammonia.

The invention relates to the technical field of metal pressure processing and surface modification, and discloses a cold heading forming method for improving the tensile strength of a new energy automobile bolt, and the cold heading forming method comprises the steps that the surface of a metal wire rod is pre-coated with a layer of solid-state ion lubricant containing piezoelectric ceramic nanoparticles and solid-state electrolyte containing nitrogen and carbon; the coated wire rod is subjected to cold heading forming, instantaneous peak contact pressure is applied in the forming process, piezoelectric ceramic nanoparticles generate a piezoelectric effect to form a transient electric field, ions in the solid electrolyte are driven to migrate to the surface of the wire rod and permeate into the surface of the wire rod, in-situ surface strengthening is achieved, and a bolt semi-finished product is obtained; and finally, the bolt semi-finished product is subjected to low-temperature destressing tempering treatment and thread rolling. Plastic forming and surface strengthening are integrated in a single process, traditional high-temperature heat treatment is replaced, the technological process is remarkably shortened, high-temperature deformation is avoided, the product size precision is improved, and the manufactured bolt has high tensile strength, surface hardness and fatigue life.

The application relates to a preparation method and application of a Janus structure photothermal-piezoelectric hydrogel dressing for infected wound repair, and the preparation method comprises the following steps: phenylboronic acid grafted methyl acrylamide gelatin and dopamine grafted hyaluronic acid are respectively dissolved in deionized water, MXene@CeO2 heterojunction is uniformly ultrasonically dispersed, after mixing, sodium hydroxide is used to adjust the pH to be slightly alkaline, and a Janus structure inner layer is formed; phenylboronic acid grafted gelatin and ortho-nitrobenzyl alcohol grafted hyaluronic acid are respectively dissolved in deionized water, BaTiO3 is uniformly ultrasonically dispersed, and a Janus structure outer layer is formed after mixing. The Janus structure photothermal-piezoelectric hydrogel dressing prepared by the application has the characteristics of space-time release to adapt to the wound repair process, in addition, has excellent photothermal conversion performance, kills bacteria on the infected wound through photothermal heating, effectively simulates physiological electrical signals through piezoelectric effect, regulates cell behavior, and can be used for infected wound repair.

The application provides a non-immersed transmembrane pressure detection system, which is characterized in that: a liquid inlet detection module, a permeation end detection module, a backflow end detection module and a transmembrane pressure calculation module are arranged, a non-immersed transmembrane pressure detection circuit is arranged in each of the liquid inlet detection module, the permeation end detection module and the backflow end detection module, the corresponding transmembrane pressure calculation result is obtained by calculating the liquid inlet detection signal, the permeation end detection signal and the backflow end detection signal output by the circuit, a four-stage amplification and analog signal isolation circuit composed of a high-precision resistance voltage division network, a first-stage operational amplifier circuit, a second-stage operational amplifier circuit, a linear optical coupler, a third-stage operational amplifier circuit and a fourth-stage operational amplifier circuit is arranged in the non-immersed transmembrane pressure detection circuit, the detected current signal is converted into an electrical signal by using the operational amplification piezoelectric effect, and the piezoelectric type can provide an anti-interference signal electrical output after isolation chip. The application has good linearity, simple circuit calculation and effectively solves the problem of electrical signal isolation between an analog signal and a single-chip microcomputer application system.

The invention relates to a functionalized small molecular group water generation patch based on a multi-physical field synergistic effect and a preparation method and application thereof.The patch is composed of a flexible base material and a functional coating coated on the flexible base material, and the surface of the functional coating is covered with a porous protective film; the functional coating is formed by mixing and curing a multi-element nano composite material and a macromolecular adhesive and carrying out polarization treatment; the multi-element nano composite material comprises nano tourmaline, Er: SrTiO3 nanocrystals, Nd2Fe14B magnetic powder, graphene, molybdenum disulfide quantum dots, Pr < 3 + >: sapphire whiskers, Eu (TTA) 3 / TP clusters and PEG brush molecules. Through the synergistic effect of multiple physical fields of piezoelectricity, photoacoustic, magnetism, quantum and the like, common water is efficiently activated into small molecular group negative potential water, external energy source driving is not needed, installation can be convenient, the effect is remarkable and lasting, and the device can be widely applied to the fields of household drinking water, agricultural irrigation, aquaculture, medical care and the like.

A piezoelectric and luminescent simultaneous material of the present invention includes a core layer including a luminescent particle and a shell layer attached to a surface of the core layer and including a ligand having a piezoelectric property, and further, a single SPL material using a chemically combined piezoelectric ligand and a luminescent particle can simultaneously achieve piezoelectricity and luminescence.