89 results about "Elastic substrate" patented technology

The invention discloses an artificial muscle system, a manufacturing method and application, and the system comprises an integrated driving unit which is composed of artificial muscles with spiral or twisted structures and can generate mechanical movement of rotation, contraction or stretching under external stimulation; the integrated heat management unit comprises a fluid pump with an electrode with a specific surface area of 100m < 2 > / g-1500m < 2 > / g, and is driven by voltage to generate one-way fluid flow so as to quickly dissipate heat generated after the artificial muscle is driven; the integrated sensing layer is formed by compounding a functional filler and an elastic substrate, is integrated on the surface or inside the artificial muscle and is used for monitoring the deformation, temperature, pressure and displacement states of the artificial muscle in the driving process in real time; the fluid pump is integrated with the artificial muscle in a series, parallel or composite configuration mode, the cooling time is shortened, and the driving frequency and efficiency are improved. The system has a wide application prospect and can be applied to the fields of intelligent composite materials, robots, wearable equipment, bionic engineering and medical instruments.

In order to solve the problems that an existing stretchable circuit board is large in impedance and short in service life, the stretchable circuit board comprises an elastic substrate and an elastic packaging layer, the elastic packaging layer covers the surface of one side of the elastic substrate, and the elastic packaging layer covers the surface of the other side of the elastic substrate. A fiber reinforcement area is formed on one side, facing the elastic packaging layer, of the elastic substrate, a glass fiber layer penetrating through the elastic substrate is arranged in the fiber reinforcement area, a line groove is formed in the fiber reinforcement area, the glass fiber layer partially penetrates through the line groove, the line groove is filled with a liquid metal coating, and the liquid metal coating is arranged on the elastic substrate. And a circuit pattern is formed by the liquid metal coating in the circuit groove.

The invention discloses a preparation method of a large-area decoupling type fiber grating sensor based on an island bridge structure, and the method comprises the steps: firstly carrying out the peripheral pre-stretching of an elastic substrate, and then bonding a plurality of carbon fiber composite sheets which are arranged in a matrix manner on the elastic substrate in a pre-stretching state, a fiber grating and a fiber grating wrapped by glass fiber are respectively bonded and fixed on the two rows of fiber positioning grooves of each row of carbon fiber clad sheets, each fiber grating is provided with a grating point in the groove of each carbon fiber clad sheet, and each groove of each carbon fiber clad sheet is filled and cured; finally, after the elastic substrate is pre-stretched and released, the top surface of the elastic substrate is covered with an elastic top sealing layer, and therefore the large-area decoupling type fiber grating sensor is formed. The large-area decoupling fiber grating sensor prepared by the invention can still obtain a high-precision measurement result when facing high mechanical stress and dynamic deformation.

The invention discloses a sensitization type MEMS hydrophone and a preparation method thereof. The sensitization type MEMS hydrophone comprises a sensitization type elastic substrate, a lower electrode assembly, a PZT piezoelectric sensitive assembly, an upper electrode assembly and an insulating material layer. The lower electrode assembly, the PZT piezoelectric sensitive assembly and the upper electrode assembly are sequentially arranged on the surface of the sensitization type elastic substrate from bottom to top, and the insulating material layers are arranged on the surface of the sensitization type elastic substrate, in the lower electrode assembly, in the PZT piezoelectric sensitive assembly and in the upper electrode assembly respectively. Therefore, the interior of the lower electrode assembly, the interior of the PZT piezoelectric sensitive assembly and the interior of the upper electrode assembly are insulated. The lower electrode assembly and the upper electrode assembly are led out through conductive cables and connected in series, electric signals generated by the PZT piezoelectric sensitive assembly are output through the lower electrode assembly and the upper electrode assembly, and signal measurement is achieved through a circuit and a test system. The MEMS hydrophone has the advantages of being compact in structure, high in sensitivity, high in anti-interference capacity and the like, and the application range of the MEMS hydrophone is widened.

The invention provides an integrated flexible optical fiber sensing device and an in-vivo sensing method thereof, and belongs to the technical field of crossing of intelligent sensing and additive manufacturing. Comprising two fixing mechanisms which are arranged in parallel and at an interval and used for being fixed to the surface of a detected structure, and first caulking grooves are correspondingly formed in the end faces of the two fixing mechanisms; the elastic base body is arranged in the area between the two fixing mechanisms and arranged in a bent shape, a second caulking groove is formed in the end face of the elastic base body, and the second caulking groove is further communicated with the first caulking grooves in the two fixing mechanisms; the metalized optical fiber is sequentially embedded in the first embedding groove and the second embedding groove, and FBG fiber gratings are arranged at the two ends, located in the first embedding groove, of the metalized optical fiber; the metalized optical fiber, the two fixing mechanisms and the elastic base body are integrally formed. Metal 3D printing processing is adopted to improve the manufacturing efficiency, optical fiber metallization and an optical fiber-metal integrated forming process are combined, rigid connection of the optical fiber and the metal matrix is achieved, and heat resistance and operability are improved.

The invention belongs to the technical field of photoelectric material preparation, and particularly discloses a quantum dot light-emitting film high-resolution patterning method based on a laser deposition technology, which comprises the following steps: forming a thermoplastic polyurethane particle colloidal solution; forming a thermoplastic polyurethane film; evaporating the metal film; performing laser deposition on a quantum dot light-emitting material; and releasing the tension. According to the quantum dot light-emitting film high-resolution patterning method based on the laser deposition technology, the quantum dot light-emitting material induces the quantum dot solution to flow on the pre-stretching elastic substrate and deposits the quantum dot solution into any two-dimensional pattern, the pre-stretching stress of the elastic substrate is released, pattern deformation assisted by mechanical deformation of the substrate is achieved, and the patterning quality of the quantum dot light-emitting film is improved. Therefore, a high-resolution pattern and a pixel array are obtained.

The application discloses a kind of hypersensitive coupling bionic strain sensors and preparation method thereof, belong to the field of strain sensor.The specific method is through coupling bionic arthropod crack receptor and helical growth divergent law of sunflower seed, design coupling bionic strain sensor structure, prepare flexible elastic substrate with micro-nano coupling bionic crack array using replication transfer method, and carry out ion sputtering and plate a layer of nano silver film, obtain the resistance layer deposited on flexible elastic substrate and micro-nano coupling bionic crack array.Finally, copper wire electrode is packaged on the surface of resistance layer, and a kind of coupling bionic strain sensor is obtained, which not only has ultrahigh sensitivity, but also good durability, rapid response time and recovery time, simple structure, and excellent performance in all aspects.

The present invention discloses an electrocoagulation shear, which belongs to the field of medical devices and includes: a movable shearing electrode, which includes an elastic substrate and shearing pieces connected to each other, and a plurality of shearing pieces are linearly arrayed and distributed on the outer wall of the elastic substrate; a fixed shearing electrode, which is rotatably connected with the movable shearing electrode around the same axis, and the movable shearing electrode can move to an initial position and be parallel to the fixed shearing electrode; the fixed shearing electrode includes a shearing blade, and the movable shearing electrode can move toward the fixed shearing electrode to a contact position, and the outer wall of the shearing blade abuts against one of the shearing pieces when the movable shearing electrode is in the contact position; when the movable shearing electrode in the contact position rotates toward the fixed shearing electrode, the elastic substrate generates elastic deformation and pushes the shearing pieces to abut against the shearing blades in turn. Through the above-mentioned configuration, the present invention can efficiently shear target tissue in a narrow wound on the head.

The application provides a flexible sweating cooling composite material and a preparation method and application thereof, and belongs to the technical field of active thermal protection. The flexible sweating cooling composite material comprises, from outside to inside, a sweating function layer, a working medium conveying layer and an elastic substrate layer. The sweating function layer is a composite material comprising a flexible porous material and a hydrogel. The flexible sweating cooling composite material can realize macroscopic and microscopic double precise controllable distribution of the cooling working medium, improve the uniformity of the cooling working medium, has higher cooling efficiency, and meanwhile, each function layer is a flexible material, can be stretched and deformed, and has a thin thickness, good covering effect, can be attached to the surface of each part of an aircraft, good sealing performance, and can adapt to the complex surface requirements of different aircraft surface parts.

To provide a local working method and a local working device suitable for smoothing work for removing surface roughness of a work having an optional shape surface up to a work having a curved surface of a small radius of curvature from a planar work, and particularly suitable for correcting and finishing a reflecting surface of an X-ray mirror of highly accurately creating a shape, without impairing shape accuracy.SOLUTION: A porous elastic body sheet having a thickness of 300 μm to 1 mm and a Shore A hardness of 50 to 90 is joined to an elastic base material directly or via another elastic body, at least a part of the porous elastic body sheet is protruded to form an action part, the action part is in a self-holding state by a dome structure of the sheet itself or in an elastically supported state where a rear surface is held by another elastic body, and a catalytic pad having a film of a catalyst formed on a surface of the porous elastic body sheet is used.SELECTED DRAWING: Figure 1

The invention discloses a bionic robotic fish cooperatively driven by rigid-flexible coupling pectoral fins and a variable-rigidity body, a left pectoral fin mechanism and a right pectoral fin mechanism are arranged in a mirror image manner and are mounted at an inclined included angle relative to a longitudinal neutral plane of a fish body, and branch fin bones in pectoral fins realize two-degree-of-freedom wing rocking and flapping movement by adopting coaxial gears and rope winding mechanisms; the pectoral fin on each side is provided with a plurality of fin rays, rigid and flexible joints are alternately matched with an elastic substrate and paired memory alloy wires for antagonistic actuation to realize controllable bending and traveling waves, and a hydrogel fin film is integrally poured outside the pectoral fin to form a continuous stress surface and ensure watertightness; the body part is driven by left and right pull wires which are wound and unwound in a differential mode and driving and driven gears to achieve bidirectional large-stroke bending, memory alloy actuators which are symmetrical up and down and hyperelastic wires are overlaid to regulate and control pretension and stress paths, and continuous adjustment of equivalent bending rigidity and damping is achieved. According to the structure, fin-body fusion, pectoral fin beat / wave coupling motion and body traveling wave propagation cooperative work are achieved under the compact size, and efficient propelling and sensitive maneuvering are both considered.

The invention relates to the technical field of preparation of medical supplies, in particular to a medical ground mat and a preparation process thereof.The preparation process comprises the steps that firstly, 60-80 parts of thermoplastic polyurethane, 20-40 parts of thermoplastic polyurethane, 5-10 parts of nano-silicon dioxide, 2-3 parts of silver-loaded zeolite and 3-5 parts of shape memory polymer are taken according to the proportion and mixed; then carrying out micro-foaming molding to obtain a preformed body; after precuring the preformed body at 60 DEG C, carrying out plasma activation treatment on the surface to obtain the elastic base material; the melt-blown fiber membrane subjected to 25 kV electrostatic electret treatment is compounded on the upper surface of the elastic base material in a hot-pressing mode; the microporous gel layer loaded with the slow-release disinfectant is adsorbed into the elastic base material in a vacuum mode, and a functional complex is obtained; in this way, the technical problems that in the prior art, the plasticity of a plasticine layer or a silica gel layer adopted in a dust removal pad is reduced after being pressed for a long time, the attaching degree of a dust removal film and a shoe sole is reduced, and use is affected are solved.

The present invention relates to a device for recording an excess of a threshold temperature, and more particularly to a device for recording an excess of a threshold temperature as an elastic label. The device for recording an excess of a threshold temperature is an elastic label, and includes an adhesive layer, a colored elastic substrate containing 5% by mass or more of halogen atoms (on which the value of the threshold temperature to be recorded is written), a structural unit C H Heat-sensitive materials consisting of solid organic substances containing (n 5) (within ±5°C of the threshold temperature indicated on the label) ℃ The device has a layered structure including a substrate and a transparent protective film that irreversibly changes transparency when heated within ±5°C of the specified threshold temperature, even after being attached to a cylindrical surface with a radius of curvature of 2 mm or more and stretched 10% longitudinally and transversely relative to its original size. ° The invention improves the operational safety of a variety of equipment, particularly electrical equipment, by maintaining the ability to accurately record threshold temperature exceedances while adhering to surfaces with complex shapes and linear dimensions that vary by less than 10%.

The invention relates to the technical field of miniature drivers, and particularly discloses a miniature artificial muscle driver capable of bending and deforming bidirectionally and a preparation method thereof.The miniature artificial muscle driver capable of bending and deforming bidirectionally comprises an elastic substrate, a nickel anchoring structure, an SMA wire, a photoetching array structure and a PDMS flexible layer; nickel anchoring structures, SMA wires and photoetching array structures are symmetrically arranged on the upper side and the lower side of the elastic substrate, the number of the photoetching array structures is multiple columns, the number of the SMA wires is multiple rows, the SMA wires vertically penetrate through the photoetching array structures and form a net-shaped structure with the photoetching array structures, the nickel anchoring structures are located at the two ends of the SMA wires, and the PDMS flexible layer is poured in gaps of the net-shaped structure. The micro artificial muscle driver which is miniaturized, light, high in energy density and capable of bending and deforming bidirectionally is prepared by selecting a light-weight and high-strength substrate material and using a micromachining technology.

The application discloses a kind of medium-high frequency stretchable carbon nanotube electromagnetic shielding materials and its preparation method and application.The preparation method includes: high-conductivity metal, antioxidant metal is combined with carbon nanotube film in sequence, to form high-conductivity metal layer, antioxidant metal layer on the surface of the carbon nanotube film, obtain nanometer metal carbon nanotube composite film;Stretching force is applied to elastic substrate, and its surface is combined with the nanometer metal carbon nanotube composite film, then water-based resin is applied to the other side surface of the elastic substrate, then the stretching force applied to the elastic substrate is released, and the elastic substrate drives nanometer metal carbon nanotube composite film to retract, to obtain medium-high frequency stretchable carbon nanotube electromagnetic shielding material with wrinkle structure.The application combines carbon nanotube film with metal-based shielding layer, adjusts shielding efficiency by flexibly changing the thickness of nanometer metal layer and wrinkle structure design, and can realize 8-40GHz medium-high frequency electromagnetic shielding effect.

The invention discloses an epidural electrical stimulation device which comprises a carrier configured to be in a rod shape and provided with a far end and a near end; the stimulation array comprises a plurality of electrical stimulation units, and the plurality of electrical stimulation units are sequentially arranged on the carrier in the axial direction; each electrical stimulation unit comprises a sheet-shaped elastic substrate attached to the carrier and a sheet-shaped flexible electrode attached to the outer side surface of the elastic substrate; the pulse generator is used for providing pulse current for the flexible electrode; the catheter is arranged outside the carrier in a sleeving manner, and the catheter is provided with a far end and a near end which are consistent with the carrier; the elastic substrate has a folded state in which the elastic substrate wraps the outer peripheral surface of the carrier through elastic deformation and an unfolded state in which the elastic substrate is bent reversely through elastic reset, and the guide pipe axially moves relative to the carrier so that the elastic substrate can be switched to the folded state or the unfolded state.

The invention discloses a bimodal bionic touch sensing electronic skin system for a robot face and a preparation method of the bimodal bionic touch sensing electronic skin system. The system constructs a double-layer elastic sensing structure based on laser induced graphene (LIG), has skin-like static and dynamic tactile sensing functions, can realize real-time identification and feedback of external mechanical stimulation, transfers LIG patterns to a flexible elastic substrate with high quality through a universal low-temperature transfer printing process, and can be used for preparing a flexible elastic film. Physical structure interlocking and mechanical property regulation and control of a transfer printing interface are realized by utilizing a phase change mechanism of a transfer printing medium at a glass-transition temperature or a freezing point. By means of the method, high-quality, high-efficiency and batched LIG transfer printing can be achieved, the minimum thickness of an elastomer transfer printing substrate is 6.7 microns, and the Young modulus is 3.9 kPa. The ultrathin and soft touch electronic skin and the rigid robot face have good fitness and mechanical flexibility, the application limitation of a rigid sensor in a complex curved surface area is broken through, and the ultrathin and soft touch electronic skin is particularly suitable for equipment such as a robot with an emotional interaction function.

The embodiment of the invention provides an electronic device to weaken the interference of a noise signal in a resonant cavity on an antenna, and the electronic device comprises a grounding assembly, a frame body and a display module, the grounding assembly comprises an elastic base body and conductive cloth, the elastic base body comprises a first elastic layer, a reinforcing sheet and a second elastic layer which are stacked in sequence, and the area of the orthographic projection of the second elastic layer on the reinforcing sheet is smaller than the area of the surface, facing the second elastic layer, of the reinforcing sheet; the frame body is provided with an installation groove, at least part of the second elastic layer is located in the installation groove, the conductive cloth wraps the outer surface of the elastic base body, the reinforcing sheet is bonded with the frame body, the display module is connected with the frame body in a grounding mode through the conductive cloth, the conductive cloth faces the groove bottom of the installation groove, and the reinforcing sheet is arranged on the frame body. And the groove is abutted against the groove bottom of the mounting groove.

The present application relates to the field of geophysical well logging, and discloses a fiber-optic sensing acoustic wave detector based on an elastic substrate for supporting multi-directional detection, which comprises a fiber-optic sensing acoustic wave detector body, a plurality of acoustic wave receivers arranged in an equicircular central angle form inside the fiber-optic sensing acoustic wave detector body, an elastic substrate and a fiber-optic cable arranged in each acoustic wave receiver, the elastic substrate is used for sensitization, a through hole is arranged between the central position of the top surface of the elastic substrate and the central position of the bottom surface of the elastic substrate, the fiber-optic cable is fixed on the elastic substrate and used for conducting a laser pulse signal, the fiber-optic cable passes through the through hole and extends to the inside of the elastic substrate, and a grating is engraved on the position where the fiber-optic cable is located inside the elastic substrate, the grating is used for reflecting the laser pulse signal. The circumferential direction receiving can be realized simultaneously, the fiber-optic cable winding is not needed, and defects such as serious optical attenuation and fiber-optic cable breakage caused by too small curvature radius of the fiber-optic cable winding can be avoided.

An impact-resistant, sealing and cooling integrated bearing of a pneumatic starter comprises an inner ring, an outer ring, rolling bodies and a sealing cover, the inner ring is composed of a first inner ring and a second inner ring which are detachably connected, and the rolling bodies are assembled on the outer surfaces of the first inner ring and the second inner ring respectively; first grooves are symmetrically formed in the inner circular surface of the outer ring, a buffering base body is embedded in the grooves, and the buffering base body comprises a honeycomb-shaped elastic base body and a plurality of wave-shaped metal elastic rings arranged on the honeycomb-shaped elastic base body in a sleeving mode; an annular main channel and an integrally-formed boss are arranged in the outer ring, a plurality of contact blocks are arranged on the boss, each contact block is fixedly connected with a flow guide block located in the annular main channel through a connecting rod, a friction disc is further arranged between the rolling bodies, and a plurality of protrusions connected with the outer edge of the friction disc are arrayed on the friction disc. Impact energy is absorbed through the buffering base body, the pressure of the cavity is monitored and regulated in real time through the pressure sensor, self-adaptive regulation of the flow of cooling liquid is achieved by driving the flow guide block through the friction disc, and the impact resistance, the sealing performance and the cooling efficiency of the bearing are remarkably improved.

The present application relates to the technical field of functional coating, in particular to a kind of anti-adhesion, stain-resistant, lubricated and wear-resistant coating and preparation method thereof, comprising, by mass percentage: 12-22% of self-quenching polyurethane resin emulsion; 30-40% of medium-soft polyurethane resin emulsion; 10-20% of water-based polyolefin resin emulsion; 2-6% of silicone dispersion water-based silicone emulsion; 2-6% of PTFE dispersion emulsion; 2-8% of high-silicon modified polyurethane emulsion; 1-5% of modified intermediate silicone resin emulsion; 1-12% of isocyanate curing agent and / or gamma-glycidyl ether oxypropyl trimethoxysilane; 1-6% of water; 0.0-0.5% of leveling agent; 0.0-1% of surfactant; 0.0-0.8% of thickening agent; 0-18% of cosolvent.The present application obtains a kind of temperature-resistant and wear-resistant coating by formula optimization, which has good adhesion and close adhesion on the surface of non-polar elastic substrate, and can adapt to the stretching of elastic substrate without peeling off.

The invention provides a protective film of a flexible screen and a preparation method of the protective film, and aims to provide improved wear resistance, elasticity and adhesion. The protective film is of a multi-layer composite structure and comprises an outer wear-resistant and scratch-resistant layer, a middle elastic base material layer and an inner adhesion layer. The wear-resistant and scratch-resistant layer is made of a nanoscale hardened material and has a microporous structure to enhance the scratch resistance and the antifogging effect; the elastic base material layer is formed by mixing polyurethane and polyvinyl alcohol fibers and provides high elasticity and tear resistance; and the adhesion layer is made of a modified silica gel material and is easy to mount and dismount, so that the limitation of a traditional protective film in the aspects of durability, elasticity and usability is effectively solved.

The present disclosure relates to methods and apparatuses for stretching, transferring, and bonding elastic parts under tension to an advancing carrier substrate during the assembly of absorbent articles. A continuous carrier substrate may be advanced in a machine direction at a first speed, and a discrete elastic part may be cut from a continuous elastic substrate having a direction of stretch in a cross direction. The speed of the discrete elastic part is changed from a second speed to the first speed, and the central region of the discrete elastic part is stretched in the cross direction. The discrete elastic part is bonded with the continuous carrier substrate such that the stretched central region extends in the cross direction between the first and second longitudinal edges of the continuous carrier substrate. The discrete elastic part may also be bonded with the carrier substrate with adhesive and / or mechanical bonds.

Disclosed is a densified cell assembly and methods for preparing the same. In one embodiment, an isostatic press is applied to a bag which contains a plate and two elastic substrates enveloping a cell pouch, wherein one or more tabs are extended from the cell pouch, wherein the cell pouch accommodates a cell stack comprising one or more electrode layers and one or more electrolyte layers. In one embodiment, the tabs are not damaged or disconnected from the cell pouch due to compression.

The application provides a flexible magnetic sensor array and a preparation method thereof, and the flexible magnetic sensor array comprises a high-elasticity substrate film layer, an array rigid island layer and a magnetic sensor layer, the array rigid island layer comprises a plurality of rigid islands arranged in an array on the high-elasticity substrate film layer, the magnetic sensor layer comprises a magnetic sensor arranged on each rigid island, each rigid island draws a plurality of elastic electrodes from the magnetic sensor, all the elastic electrodes are arranged on the high-elasticity substrate film layer in a matched mode and are drawn to the edge of the high-elasticity substrate film layer, the Young's modulus of the magnetic sensor is greater than the Young's modulus of the rigid island, and the Young's modulus of the rigid island is greater than the Young's modulus of the high-elasticity substrate film layer. The high-elasticity substrate film layer, the array rigid island layer and the magnetic sensor layer of the application have a modulus gradient structure and have a strain isolation effect under deformation, so that the high-elasticity substrate film layer bears most of the strain and the original performance of the magnetic sensor is ensured.

The invention discloses a micro-nozzle assembly and a multi-powder feeding device and method. The problems that in the prior art, multi-material powder laying efficiency is low, and the technology is unstable are solved. The multi-powder feeding device comprises a fixing frame and a plurality of micro-nozzle assemblies installed on the fixing frame. The micro-nozzle assembly is characterized in that a part of an assembly body forms a common elastic substrate with a slit, so that a plurality of vibration finger corridors capable of independently bending and vibrating are defined. According to the multi-material additive manufacturing device, the vibration finger corridors are independently driven through the multiple electric actuating elements, on-demand conveying of multiple kinds of powder can be accurately controlled, a traditional powder suction-powder filling technology is not needed, and the efficiency and stability of multi-material additive manufacturing are remarkably improved.

The invention discloses an interface hydrogel enhanced elastic conductor and a manufacturing method thereof, and the elastic conductor comprises a printed electrode layer which is formed on an elastic substrate through silk-screen printing of conductive ink containing a silver sheet; and the interface hydrogel layer covers the surface of the electrode layer in a cross-linking manner, and the interface hydrogel layer and the silver sheet have an interface effect, so that the conductivity and the stretchability of the elastic conductor are improved. According to the elastic conductor, the hydrophilic interface hydrogel layer is constructed on the surface of the printed electrode layer in situ, strong interface bonding is formed between the hydrophilic interface hydrogel layer and the printed electrode layer, and in the cyclic stretching process, the resistor is rapidly recovered after deformation.

The utility model discloses a piezoelectric vibration heat dissipation device which comprises a heat conduction base and at least one vibration assembly, the heat conduction base is provided with an air guide groove, the vibration assembly comprises an elastic substrate and a piezoelectric unit, the elastic substrate is arranged on the heat conduction base and located in the air guide groove, the piezoelectric unit is arranged on the elastic substrate, and the piezoelectric unit is arranged on the elastic substrate and located in the air guide groove. The piezoelectric unit can enable the elastic substrate to deform to generate vibration, the piezoelectric unit drives the elastic substrate to repeatedly deform to generate vibration, the vibration can guide air flow to pass through the air guide groove, the air flow takes away heat on the heat conduction base, and therefore heat dissipation is conducted on working equipment. Popularization and application are easy.

The invention discloses a preparation method of an elastic modulus programmable flexible substrate. Comprising the following steps: mixing an elastomer prepolymer with a corresponding curing agent, stirring, carrying out vacuum defoaming, spin-coating on the surface of a substrate coated with a polymer film, and heating and curing; carrying out plasma treatment and then spin-coating a photocuring adhesive on the surface of the substrate; irradiating the photo-curing adhesive region by using laser according to a pre-designed pattern, and adjusting the laser scanning times of different regions to form an elastomer substrate with a gradient elastic modulus; and removing the uncured light curing glue and stripping the obtained elastomer substrate from the substrate. The elastic substrate with the modulus gradient can be widely applied to flexible electronic devices, can effectively prevent devices from being damaged due to external force stretching especially in the aspects of protecting strain-sensitive electronic components, chip pins, strain-insensitive devices and the like, and has better adaptability and stability.

The invention discloses a center-edge bipolar wurtzite piezoelectric film enhanced stress sensor and a preparation method, and belongs to the technical field of electronic functional films, the center-edge bipolar wurtzite piezoelectric film enhanced stress sensor comprises an elastic substrate, an edge wurtzite piezoelectric film deposited on the edge of the elastic substrate, and a center wurtzite piezoelectric film deposited in the center of the elastic substrate, the device comprises an edge wurtzite piezoelectric film, a central wurtzite piezoelectric film, an edge electrode layer deposited on the edge wurtzite piezoelectric film, a central electrode layer deposited on the central wurtzite piezoelectric film, an insulating isolation layer deposited between the central electrode layer and the edge electrode layer, and a bridging lead located between the central electrode layer and the edge electrode layer. The growth parameters of the central wurtzite piezoelectric film and the edge wurtzite piezoelectric film are regulated and controlled, so that the polarization directions of the central wurtzite piezoelectric film and the edge wurtzite piezoelectric film are opposite, and when the elastic matrix generates elastic deformation under the action of external pressure, polarization charge changes of the central wurtzite piezoelectric film and the edge wurtzite piezoelectric film induced by deformation are superposed to form enhanced electric signals to be output. And the detection sensitivity of the stress sensor is greatly improved.