20 results about "Energy trapping" patented technology

The invention discloses a negative Poisson's ratio effect energy harvesting device and method suitable for a road structure, and belongs to the technical field of road vibration energy harvesting. The device comprises a substrate with a negative Poisson's ratio structure, piezoelectric ceramic covering and fixed on the substrate, and an excitation rod arranged on the surface of the piezoelectric ceramic. The negative Poisson's ratio structure is formed by periodically arranging a plurality of inwards-concave annular unit cells, and when the negative Poisson's ratio structure is subjected to the action of pressure stress such as traffic load, unique two-way expansion deformation can be generated, so that vertical pressure is efficiently converted into two-way tensile strain in a plane, and the two-way tensile strain is transmitted to piezoelectric ceramics. According to the structure, a traditional d31 working mode is reserved, a d32 mode is more effectively excited, the charge migration path is remarkably widened, and the electro-mechanical conversion efficiency is improved. The device is especially suitable for a low-frequency traffic load environment, solves the problem of low energy collection efficiency caused by resonant frequency mismatch of a traditional cantilever beam structure, and provides an efficient and reliable solution for self-power supply of road infrastructures.

The invention discloses a floating slab track-oriented energy harvesting system and application, and belongs to the technical field of energy harvesting. The device comprises an energy harvesting system front-end assembly, an energy regulation and control module and a state monitoring module, the energy harvesting system front-end assembly comprises an energy collector and a vibration transmission rod piece; the energy collector is mounted below the steel rail through a vibration transmission rod piece; the energy regulation and control module comprises a battery and a piezoelectric energy polymerization regulation and control module; the energy collector is connected with the piezoelectric energy polymerization regulation and control module, and the piezoelectric energy polymerization regulation and control module is connected with the battery; according to the system, the energy capturing function and the state monitoring function are combined into a whole, the integrated intelligent vibration and noise sensor can achieve self-energy-supply operation, the dynamic response of a track structure and environment noise are monitored in real time, and data support is provided for health assessment and vibration and noise reduction.

The application relates to the technical field of tunnel engineering, and discloses a tunnel automatic energy capturing device and a construction method, which comprises a self-adaptive efficiency wind power generation module and a dual-mode energy storage power supply module for supplying power to equipment in the tunnel. The self-adaptive efficiency wind power generation module comprises a mounting support and a wind wheel power generation structure, and the mounting support is arranged at a tunnel arch foot. The wind wheel power generation structure comprises self-adaptive angle blades, a rotating shaft and a generator. The self-adaptive angle blades can adjust the deflection angle according to the wind speed. A plurality of self-adaptive angle blades are arranged in a circumferential direction on the rotating shaft. The rotating shaft is connected with the input end of the generator, the generator is arranged on the mounting support, and the generator is electrically connected with the dual-mode energy storage power supply module. The application solves the problems of insufficient wind wheel adaptability and low wind energy utilization rate of the existing device, solves the problems of difficult power supply of heavy railway tunnel underground space, poor adaptability of equipment and tunnel environment and limited traditional pre-buried installation construction.

The invention discloses a red up-conversion luminescence nanometer material obtained through energy allocation and a preparation method and application thereof, and belongs to the technical field of up-conversion luminescence materials.According to the nanometer material, NaYF4 serves as a passivation core and a passivation shell on the outermost layer at the same time, NaErF4 serves as a matrix, NaYF4 serves as a passivation shell on the outermost layer, and NaYF4 serves as a passivation shell on the outermost layer and NaYF4 serves as a passivation shell on the outermost layer. Yb < 3 + > is introduced as a sensitized ion, and an active shell layer and a NaYF4: Yb sublattice shell layer of a Tm < 3 + > energy capture center are introduced. The NaYF4 passivation core and the passivation shell are utilized to effectively reduce energy loss, so that energy is recycled between the first shell layer and the second shell layer as far as possible, and 654 nm high-intensity red up-conversion emission light emitted by Er < 3 + > is finally obtained under the excitation conditions of 980 nm and 1532 nm through energy migration of Yb < 3 + >, energy back transfer of Yb < 3 + > to Er < 3 + > and the energy capture center effect of Tm < 3 + >.

The invention belongs to the technical field of noise energy harvesting, and particularly relates to an adjustable sound absorption energy harvesting device and electronic equipment. The adjustable sound absorption energy harvesting device comprises a sound absorption structure which comprises a containing shell with a containing cavity and an adjusting baffle connected with the containing shell in a sliding mode, and the cavity top of the containing cavity is provided with a tuning slit communicating with the external space; the energy harvesting structure comprises a micro-perforated plate located in the containing cavity and a piezoelectric plate arranged at an interval with the micro-perforated plate, the edge of the micro-perforated plate is connected with the cavity wall of the containing cavity, and the piezoelectric plate is located at the cavity bottom of the containing cavity; the adjusting baffle has a first position state and a second position state, and when the adjusting baffle is in the first position state, the adjusting baffle completely shields the tuning slit; when the adjusting baffle is in the second position state, the adjusting baffle at least partially opens the tuning slit. The electric energy output efficiency of the piezoelectric plate can be remarkably improved, and the dual functions of sound absorption and energy recovery are achieved.

The invention discloses a bevel type piezoelectric energy harvester structure and an energy harvesting method, and relates to the technical field of piezoelectric power generation. The core of the device comprises a main beam, a movable beam, a ratchet wheel, a double-configuration connecting assembly, a second connecting assembly, a length adjusting assembly and a piezoelectric material. One of the connecting assemblies adopts a double-inclined-plane cylinder or a pawl clamping groove structure, the pre-tightening force of a spring is regulated and controlled through an adjusting bolt, one-way rotation and fixation of a ratchet wheel are achieved, and then the break angle of the main beam and the movable beam is adjusted to adapt to multi-direction vibration; and a length adjusting assembly and a replaceable mass block are matched, so that a broadband vibration scene is flexibly adapted. Environmental vibration is transmitted to the main beam and the movable beam through the clamp, synergistic bending deformation is triggered, and the piezoelectric material completes conversion from vibration to electric energy based on the direct piezoelectric effect. The structure is convenient to assemble and maintain and high in energy conversion efficiency, and can be widely applied to industrial monitoring, intelligent wearing and other scenes.

The application discloses a wave energy collection device based on a magnetic spring-leaf spring type bistable mechanism, comprising a bistable energy trapping device (1), a motion conversion device (2), an electromagnetic power generation device (3) and a power management module, wherein the bistable energy trapping device is provided with a magnetic spring-leaf spring type bistable mechanism, and through nonlinear interaction between magnets, efficient capture of mechanical energy under low-frequency waves is realized; the motion conversion device (2) is designed through a gear transmission system and a one-way bearing, so that one-way rotation of an output shaft is ensured; the electromagnetic power generation device (3) utilizes the relative rotation principle of a magnet flywheel and a coil, the magnetic flux of the coil changes, so that a voltage is generated, mechanical energy captured by the bistable energy trapping device (1) is converted into electric energy, and simultaneously, the power management module is responsible for rectification, storage and distribution of the electric energy, so that stable power supply can be obtained under any condition. The system has wide application prospects and important economic value in the fields of marine ecosystem monitoring, climate change research and marine pollution monitoring.

The invention discloses a wind wave composite energy harvesting device and method. The device comprises a shell, a rotating shaft, a swing weight, a composite transmission mechanism, a vibration platform and a vibration energy harvesting assembly. The composite transmission mechanism comprises a one-way transmission mechanism, a speed increasing mechanism and a linear actuating mechanism. The one-way transmission mechanism comprises a first rotating structure and a second rotating structure which are rotationally connected to the rotating shaft through independent one-way bearings. And the locking directions of the two rotating structures relative to the rotating shaft are opposite. The one-way bearing is matched with the reverse locking and same-direction output mechanism of the bevel gear, high-reliability conversion from reciprocating motion to one-way rotation is achieved from the structural level, and therefore the frequency input to the vibration energy harvesting assembly can be improved in cooperation with a gear speed increasing mechanism. Meanwhile, vortex-induced vibration induced by wind power and wave foundation excitation are coupled to the same piezoelectric energy harvesting device, cooperative harvesting of wind energy and wave energy is achieved, and the problems that single vortex-induced vibration energy harvesting is sensitive to working conditions and poor in adaptability are solved.

The invention discloses an umbrella-shaped distributed segmented bluff body flow-induced vibration power generation device, which belongs to the field of power generation and comprises a flow-induced vibration module and a piezoelectric module. The flow-induced vibration module comprises a support, the top of the support is rotationally connected with a center disc, a plurality of sectional bluff bodies are connected around the circumference of the center disc through cantilever beams, and the sectional bluff bodies are distributed in an umbrella shape. The piezoelectric module comprises a piezoelectric plate, and the piezoelectric plate is tightly attached to the cantilever beam; in the working process, after wind passes through the bluff body, vibration of the bluff body can be caused, the cantilever beam is further made to deform, and at the moment, the piezoelectric plate attached to the cantilever beam converts mechanical energy into electric energy; meanwhile, as the central disc is of a rotatable structure, the central disc can drive the whole energy harvesting device to rotate together at a certain wind speed, the air resistance is reduced, and more intense bluff body vibration is induced; according to the power generation device, the whole energy harvesting device can efficiently collect wind energy from different directions, different heights and different wind speeds.

The invention relates to the technical field of constructional engineering, and particularly discloses an intelligent monitoring system for a light steel structure, and the system comprises a gradient sensing module which is used for dividing grid monitoring units and collecting temperature data in a wind-temperature coupling period to construct a temperature gradient field; the coupling stress module is used for synchronously collecting effective instantaneous wind pressure values, performing conjoint analysis with a temperature gradient field to obtain an actual combined stress value, and identifying a local stress concentration unit; the rigidity symmetry module is used for calculating the actual comprehensive rigidity of a node based on bolt fastening data and determining a pre-energy trap area through symmetrical stress analysis; the energy trap identification module analyzes energy flow characteristics in combination with the vibration parameters and separates out an energy trap area; the damage level judgment module is used for calculating a local damage potential index and a fatigue life margin, and constructing a judgment matrix to complete risk level division; and local damage hidden dangers of the light steel grid structure are monitored in real time.

The application discloses a preparation method of a cold energy trapping system based on a MICP technology, and belongs to the technical field of cold energy storage. Microbial solution is configured, the microbial solution is injected into a target position in a pulse injection mode, and a 5-10 V direct current electric field is applied to the target position during injection; calcium carbonate is generated by microbial catalysis to fill pores and cracks of the target position, and a trapping layer is formed. The application adopts pulse injection to improve the uniformity of microbial distribution, and simultaneously utilizes a low-voltage electric field to guide the injection to improve the migration ability of the microorganisms, so that the microorganisms are uniformly distributed in low-permeability media (such as clay), and the uniformity of the sedimentary layer is improved.

The application discloses a kind of based on oscillating float active-passive hybrid wave energy power generation method, it is related to marine renewable energy technology field, the application includes step one, external energy receiving module, step two, internal energy transmission module, step three, active-passive hybrid control module and step four, electric energy conversion storage module.The application breaks through the limitation of traditional energy trapping frequency band by built-in nonlinear dynamics mechanism, realizes the efficient directional transmission of wideband wave energy to internal vibrator, can be stable and adapt to multi-frequency actual marine wave scene, and continuously maintains higher energy trapping efficiency in complex sea conditions.For the defects of high energy consumption of active vibration control and weak passive vibration reduction of existing energy trapping devices, active-passive hybrid control strategy is adopted, which effectively reduces the dependence of active control and operating energy consumption, and adapts to long-term continuous energy trapping operation in marine environment.

The invention belongs to the technical field of ocean renewable energy utilization, and discloses a gas-liquid hole cavity resonance wave energy harvesting device and a working method thereof. The device provided by the invention comprises a shell, a variable-frequency resonant cavity, a telescopic mechanism, a control unit and an energy storage unit, the variable-frequency resonant cavity comprises a liquid cavity and an air cavity, the liquid cavity is located on the water inlet side of the device, and the air cavity is located on the air side; the liquid cavity is used as a main adjusting cavity in an independent operation mode of the device, and the air cavity is used as a main adjusting cavity in a combined operation mode that the device is matched with the secondary energy conversion device; the telescopic mechanism is used for adjusting the size of the liquid cavity and / or the air cavity; the control unit is connected with the variable-frequency resonant cavity and the telescopic mechanism and used for adjusting the frequency of the variable-frequency resonant cavity to be the same as the peak frequency of waves; the energy storage unit is used for storing the converted electric energy. Compared with traditional devices such as an oscillating water column, the frequency adjusting range is wider, and miniaturization is achieved.

The application discloses a kind of energy trapping steel pipe transmission tower wind vibration self-adaptive spoiler device, including two identical spoiler structures, which are connected by control rod between two.The spoiler structure includes fixed unit, spoiler unit and energy storage control component, the spoiler unit includes two unequal size guide vanes arranged on its outer ring and super magnetostrictive element arranged in its radial plane, and piezoelectric sheet is attached to the end of super magnetostrictive element;The fixed unit is spaced apart by magnet at both ends, and the super magnetostrictive element extrudes the piezoelectric sheet to generate electricity under the action of changing magnetic field, and the energy storage control component stores electrical energy and controls the rotation speed of the control rod.The device can be self-adapted according to different wind speed, freely rotate to adapt to complex and changeable multi-directional incoming flow, convert wind energy into electrical energy for capture and use, and has good application prospect.

The utility model relates to a dual-channel quartz resonance humidity-sensitive device, which is based on the energy trapping theory of a quartz crystal, that is, only waves higher than cutoff frequency can be spread on a quartz substrate when the waves are spread on the quartz substrate. The thickness of the non-electrode area of the quartz substrate is changed by forming the concave separation grooves in the non-electrode area of the upper surface and the non-electrode area of the quartz substrate, the cut-off frequency of the non-electrode area of the quartz substrate can be changed, and the cut-off frequency difference value of the electrode area and the non-electrode area of the quartz substrate is increased. According to the dual-channel quartz resonator, the wave of the electrode area of one vibration electrode group on the quartz substrate cannot be transmitted to the electrode area of the other vibration electrode group, so that the vibration coupling and interference of the dual-channel quartz resonator are reduced, the structure is simple, the processing cost is low, and the vibration interference problem of the traditional dual-channel quartz resonator is effectively solved.

The present application belongs to the technical field of swing energy trapping, and particularly relates to a bidirectional swing electromagnetic energy trapping device and electronic equipment. The bidirectional swing electromagnetic energy trapping device comprises a magnetic sensing structure, a transmission structure, and a swing structure. The magnetic sensing structure comprises a central rotating shaft, a central rotating disc rotatably connected to the central rotating shaft, a magnet for generating a magnetic field, and a coil located in the magnetic field, the magnet and the coil being selectively connected to the central rotating disc. The transmission structure comprises a first transmission assembly located on one side of the central rotating disc and a second transmission assembly located on the other side of the central rotating disc. The swing structure is swingably arranged around the central rotating shaft and comprises a reversing element and a swing element slidably arranged in a predetermined direction along the axial direction of the central rotating shaft. When the swing element swings in a first direction, the reversing element guides the swing element to slide and is transmissionally connected to the first transmission assembly. When the swing element swings in a second direction, the reversing element guides the swing element to slide and is transmissionally connected to the second transmission assembly. The present application improves the energy trapping efficiency, and realizes energy trapping under wideband, low frequency, and small amplitude swing.

The invention relates to the technical field of millimeter wave antennas, in particular to a filtering grid array antenna based on a high-resistance silicon substrate. Comprising a first metal layer, a second metal layer, a third metal layer and a dielectric layer, the third metal layer, the dielectric layer, the second metal layer and the first metal layer are sequentially arranged to form a laminated structure, the third metal layer is provided with a main radiator, the second metal layer is provided with an antenna ground, and the first metal layer is provided with a microstrip feed strip. The main radiator comprises a grid array antenna structure, a high-frequency radiation type filtering unit and a low-frequency energy trapping type filtering unit, the high-frequency radiation type filtering unit and the low-frequency energy trapping type filtering unit are arranged in the area of the grid array antenna structure, the antenna ground is provided with a resonance gap, the microstrip feed strip is provided with a low-frequency conduction type filtering unit, and the low-frequency conduction type filtering unit is arranged in the low-frequency conduction type filtering unit. And the microstrip feed strip is fed, so that electromagnetic energy can be coupled into the grid array antenna structure through the resonant slot. By combining a plurality of filtering mechanisms, the capability of generating a plurality of controllable filtering zero points in a wide frequency band is realized.

The application relates to a sandwich structure quartz resonator and an optimization method thereof and a hydrogen sensor. The quartz resonator comprises metal electrodes and a quartz light plate; the metal electrodes are arranged on the upper and lower sides of the quartz light plate to form a sandwich structure; the lower metal electrode comprises a platinum electrode and a chromium electrode which are sequentially arranged in layers from bottom to top; the upper metal electrode comprises a first electrode and a second electrode which are arranged at intervals along the length direction of the quartz light plate; the first electrode comprises a chromium electrode, a gold electrode and a platinum electrode which are sequentially arranged in layers from bottom to top; the second electrode comprises a chromium electrode and a gold electrode which are sequentially arranged in layers from bottom to top; and the thickness of the platinum electrode is 0.2 mu m. The quartz resonator with the optimized thickness of the platinum electrode realizes good decoupling characteristics and energy trapping effect of the quartz resonator, reduces the interference of the resonator parasitic mode during the working of the sensor, reduces energy loss, improves the working performance of the quartz resonator, and further improves the sensitivity of the sensor.

An eye needle rehabilitation needle device, comprising a patch assembly (2) and a needle body (3) limited in the center of the patch assembly (2), the patch assembly (2) comprises an insulating film layer (21), a conductive layer (22) and a glue layer (23) which are superimposed from top to bottom, and the technical key points are that a plurality of piezoelectric components (1) are fixed on the patch assembly (2), the piezoelectric component (1) comprises a plastic shell (14), a conductive diaphragm (13), a strip-shaped piezoelectric energy trapping piece (12) and a mass block (11) arranged at the end of the piezoelectric energy trapping piece (12); a through hole (211) is reserved on the insulating film layer (21), the shell (14) passes through the through hole (211) and is limited between the insulating film layer (21) and the conductive layer (22) through the flange (141) at the bottom, and the conductive diaphragm (13) is adhesively fixed with the conductive layer (22). It has the advantages of simple structure, convenient use, long stimulation time and the like.

The invention discloses a vibration suppression, energy harvesting and state sensing integrated intelligent anti-galloping device and system, the device comprises a shell, a stator and a first rotor, the stator and the first rotor are located in the shell, and the stator is clamped with the shell. The stator comprises a coil, the first rotor comprises a first rotor body and a permanent magnet, and the permanent magnet is arranged on the first rotor body and is opposite to at least part of the coil. The first rotor body is rotatably connected with the housing through the rotating shaft and is used for driving the permanent magnet to swing around the rotating shaft. By adopting the device provided by the invention, when the permanent magnet moves relative to the coil, the damping force opposite to the relative movement direction of the permanent magnet is applied to the coil by the magnetic field generated by the induction current so as to act on the vibrating wire, and the galloping suppression of the wire is realized. Besides, induced current generated in the coil can also be synchronously applied to continuous power supply for external electronic equipment, so that vibration suppression is realized, effective utilization of vibration energy of the power transmission line can also be realized, and energy waste is reduced.