10915 results about "Miniaturization" patented technology

The invention discloses a DC-DC power supply dynamic response optimization system based on digital PID, which relates to the technical field of DC-DC power supply dynamic response optimization, and comprises a voltage and current sampling module, a reference signal generation module, an output signal generation module, a digital signal generation module, a control module and an output signal generation module, the digital PID controller calculates control output according to errors, the PWM signal generation module generates corresponding PWM signals according to the control output, the power switch driving module amplifies the signals to drive a switch tube, the load monitoring module monitors load changes in real time, output of the load monitoring module can be fed back to other modules, and power supply dynamic response optimization is achieved. According to the invention, the dynamic response performance of the DC-DC power supply is remarkably improved, the output fluctuation is reduced, the recovery time is shortened, the power supply efficiency is improved, the stability is guaranteed by adopting multiple anti-interference design, peripheral elements are reduced, miniaturization is realized, the cost is reduced, fault diagnosis is realized, and the service life is prolonged.

The invention relates to the technical field of intelligent pianos, in particular to a piano automatic playing driving method and system, and the method comprises the steps: obtaining first external data which is used for describing the position change of keys at first playing time; converting the first external data into discrete data, wherein the discrete data is associated with a time sequence label; the discrete data is sent to a main control module, and the main control module forwards the discrete data to a control unit of the exercise device; monitoring second external data of the key at the first moment, and searching a corresponding discrete position through time sequence label association according to the first moment; and calculating a difference value between the second external data and the discrete position, and outputting an adjusting current value through the difference value by adopting a closed-loop control algorithm. The invention provides a lossless built-in driving technology and a driving method, and based on the driving method, a low-cost and miniaturized exerciser can be adopted, so that automatic playing of the piano keys is realized under the condition that the original framework of the piano is not influenced.

The invention discloses an electromagnetic ultrasonic thickness detection method and system based on a miniaturized low-power-consumption internet of things, and the method comprises the steps: carrying out the parameter optimization processing through a pulse coding excitation algorithm according to the electromagnetic characteristic parameters of a target material and a preset detection precision requirement, and outputting a low-power-consumption excitation parameter set; driving an electromagnetic ultrasonic transducer to generate a detection signal based on the low-power-consumption excitation parameter set, and outputting a compressed echo signal; performing multi-scale intrinsic mode decomposition on the compressed echo signal, and outputting a thickness correlation characteristic parameter set; inputting the thickness correlation characteristic parameter set into a depth residual error-attention network model, and outputting a thickness prediction result; and performing multi-node data fusion on the thickness prediction result based on an Internet of Things cloud platform to generate a final thickness detection report. According to the embodiment of the invention, high-precision and traceable thickness detection can be realized based on the miniaturized low-power-consumption Internet of Things.

The invention relates to the technical field of gas detection, in particular to a multi-gas accurate detection method and system.The method comprises the following steps that gas to be detected flows through a miniature gas enrichment device prepared through an MEMS technology under driving of a miniature gas pump, and target gas is adsorbed and enriched through graphene and metal oxide composite sensitive materials on the surface of a spiral gas inlet flow channel in the miniature gas enrichment device; the desorption concentrated gas is heated to the multi-gas composite detector, and the sensor array reacts with the gas to generate an electric signal; the data acquisition unit performs noise reduction, amplification and analog-to-digital conversion preprocessing on the electric signal; the data processing unit extracts characteristic vectors such as a response curve peak value and a rising slope; inputting the feature vector into a pre-trained machine learning classification-regression combined model, and outputting a gas type identifier and an initial concentration; error compensation is carried out in combination with environment temperature and humidity and a cross sensitivity interference mode library, and finally accurate information of at least nine gases is output. The device has the advantages of high sensitivity, strong anti-interference performance and miniaturization.

The present invention relates to an integrated cooling module including a central manifold having a mounting space in which components may be mounted, refrigerant flow channels in which a refrigerant may flow, and communication holes for allowing the components and the refrigerant flow channels to communicate with one another, such that the components are integrated around the central manifold, thereof excluding hoses or pipes and achieving miniaturization and weight reduction of an entire cooling system.

The invention relates to a miniaturized millimeter wave filtering magnetoelectric dipole antenna with high out-of-band rejection, and relates to the technical field of communication antennae, and the miniaturized millimeter wave filtering magnetoelectric dipole antenna with the high out-of-band rejection effect comprises a strip line feed structure which is used for generating a lower stop band radiation zero point; the n-shaped feed structure is used for feeding the magnetoelectric dipole; according to the magnetoelectric dipole radiator, a U-shaped groove is etched in a dipole patch, so that the size of the antenna is reduced; the parasitic metal strips are used for enhancing the radiation suppression effect of the upper stop band; the folding split rings are folded to reduce the size of the split rings and enhance the radiation suppression effect of the lower stop band at the same time; the inverted L-shaped short circuit branch is used for enhancing the radiation suppression effect of the upper stop band, the absolute bandwidth of the antenna is 21.1 GHz to 31.0 GHz, the relative bandwidth is 37.0%, the lowest gain is 5.0 dBi, the highest gain can reach 7.8 dBi, the suppression level from the in-band highest gain to the radiation zero point of the upper stop band is larger than 40 dBi, and the suppression level from the in-band highest gain to the radiation zero point of the lower stop band is larger than 50.0 dBi.

The invention relates to a shear-based acceleration and pressure composite sensor and an assembly method thereof, and belongs to the field of composite sensors. According to the technical scheme of the acceleration and pressure composite sensor based on the shear type structure, an acceleration detection module comprises a mass block of a regular polygon prism structure, and each side face of the mass block is provided with an acceleration sensitive ceramic piece; the pressure detection module comprises a force transmission column of a regular polygon prism structure, and each side face of the force transmission column is provided with a pressure sensitive ceramic piece, an electrode piece and an insulation block. According to the scheme, the sensitive elements of the acceleration sensor and the pressure sensor core are arranged in a polygonal mode to form a spatial three-dimensional structure, the effective area of the sensitive elements in unit volume is increased, the multiple sensitive elements act together to form superposition of pressure signals, the detection precision and sensitivity of the two are guaranteed, and the detection precision is improved. Therefore, the overall size of the composite sensor is greatly reduced on the premise that the original precision is maintained, and the composite sensor is miniaturized.

A horizontally polarized omnidirectional multi-band antenna structure includes a substrate and two structurally-symmetric radiators, each being provided on a layout area on one of the two opposite sides of the substrate, and including a X-shaped primary microstrip line, four secondary microstrip lines, four primary stubs, four secondary stubs and four resonators. The primary microstrip line has four end points arranged with the secondary microstrip lines along different extending directions. The primary stubs extend along different directions from four sections of the primary microstrip line. Each secondary microstrip line is provided with one of the secondary stubs. Resonators are provided between four end points of the primary microstrip line and the primary stubs. The antenna structure supports WiFi 6E / WiFi 7 frequency bands including the 2 GHz, 5 GHz and 6 GHz bands, has characteristics of horizontal polarization and omnidirectionality, and effectively satisfies the needs for miniaturized multi-band and wide band antennas.

The invention relates to the technical field of piezoelectricity, and discloses a miniaturized double-foot stick-slip piezoelectric actuator which comprises a stator, a rotor, a pre-tightening device and a base. The stator is in sliding connection with the base, the stator can slide on the base in the Y-axis direction, and the pre-tightening force between the stator and the rotor is adjusted through the pre-tightening device; the stator is fixedly arranged on the base, the rotor is fixedly arranged on the base, a sliding block is arranged on the rotor, and the sliding block can horizontally slide in the X-axis direction under the driving of the stator. According to the invention, the two driving feet alternately drive the mover to displace, so that the phenomenon of rollback in output displacement is effectively solved.

The invention discloses an optical lens, an image capturing module and a terminal device, the optical lens comprises seven lenses with refractive power, the first lens has negative refractive power, the object side surface is a convex surface, and the image side surface is a concave surface; the second lens element with negative refractive power has a convex object-side surface and a concave image-side surface. The third lens element with refractive power has a concave object-side surface and a convex image-side surface, respectively. The fourth lens element with positive refractive power has a convex object-side surface. The fifth lens element with positive refractive power has a convex object-side surface and a convex image-side surface. The sixth lens element with negative refractive power has a concave object-side surface and a convex image-side surface, and the seventh lens element with positive refractive power has a convex object-side surface. The optical lens satisfies the following relational expression: 190default; a FOVlt; 210deg and 1.65 lt are included in the formula I; iMGH / Flt; 1.8). According to the optical lens, the image capturing module and the terminal equipment, the miniaturization design of the optical lens can be met, meanwhile, the large field angle can be achieved, and meanwhile the imaging quality can be improved.

The invention belongs to the technical field of integrated optics and inertial sensing, and particularly relates to a thin-film lithium niobate heterogeneous integrated chip configuration for a fiber-optic gyroscope. The thin-film lithium niobate hybrid photon integrated chip is utilized to realize on-chip heterogeneous integration of functional devices of the fiber-optic gyroscope. The discrete optical path device of the gyroscope is monolithic integrated and integrally packaged, the size and cost of the optical path are greatly reduced, optical fiber interconnection is reduced, the complexity of the assembly process is obviously reduced, and the long-term reliability of the performance of the gyroscope is effectively improved. By means of the CMOS technology with mature silicon photons, low-cost and large-scale batch production of the miniature fiber-optic gyroscope can be achieved, and the requirements for miniaturization and light weight of a future weapon system are met.

The embodiment of the invention discloses a control method and device of an air conditioner, the air conditioner and a vehicle, and belongs to the technical field of air conditioning. The control method comprises the steps that the air inlet temperature and the air outlet temperature of an indoor unit are obtained, and the indoor environment temperature is obtained; determining a first temperature difference according to the absolute value of the difference between the air inlet temperature and the indoor environment temperature, and determining a second temperature difference according to the absolute value of the difference between the air outlet temperature and the indoor environment temperature; determining a temperature difference correction value according to the first temperature difference and the second temperature difference; and controlling compressor frequency according to the temperature difference correction value. According to the embodiment of the invention, the frequency of the compressor is accurately regulated and controlled under the condition that an outdoor environment temperature sensing bulb and a compressor exhaust temperature sensing bulb are omitted, the wiring space of the outdoor unit is saved, the cost is saved, and miniaturization design of the outdoor unit is facilitated.

The invention relates to the technical field of radio frequency integrated circuits and advanced semiconductor packaging, in particular to a multilayer spiral inductor structure based on an RDL process and a preparation method. The preparation method comprises the steps of seed layer deposition, gradient line width coil formation through photoetching and electroplating, alternate dielectric layer deposition, through hole etching to form vertical interconnection copper columns, air bridge forming through a photoresist sacrificial layer process and silicon nitride passivation packaging. Through fan-shaped topological layout, dielectric material collaborative optimization and three-dimensional interconnection structure design, the self-resonant frequency bandwidth is effectively improved, conductor and dielectric loss is reduced, and miniaturization integration and high reliability of high-frequency inductance elements are achieved.

Disclosed in the present disclosure are a battery assembling system and a control method therefor, and a battery production line, which relates to the technical field of batteries. The battery assembling system can reduce the risk of congestion during tray return and facilitate the miniaturization of the battery assembling system. The battery assembling system comprises a stacking platform, an assembling device, an assembling transfer line, and a return device, wherein the stacking platform is used for storing trays and battery modules located in the trays; one end of the assembling device is connected to one end of the stacking platform by means of the assembling transfer line, the assembling device is used for assembling the battery modules to be assembled, and the assembling transfer line is used for transporting the trays carrying the battery modules to be assembled to the assembling device; and the other end of the assembling device is connected to the other end of the stacking platform by means of the return device, and the return device is used for transporting the trays carrying the assembled battery modules to the stacking platform.

The invention discloses a rocker output and shaft self-calibration device and method of an unmanned aerial vehicle control terminal, the rocker output and shaft self-calibration device is composed of a rocker information acquisition unit, a rocker signal processing unit and a characteristic parameter storage unit, and zero calibration and extreme value calibration are executed when a rocker is started each time. After the rocker is calibrated, the information processing unit stores special parameters such as the zero position and the extreme value of the rocker into the data storage unit, and the special parameters are used for follow-up rocker processing including amplitude limiting, filtering, dead zone processing and output mapping. The device can reduce the drifting of the output result of the rocker caused by the aging of a rocker device, the voltage attenuation of a control terminal and the continuous friction loss between the mechanical structures of the rocker. The calibration device has no special requirements on rocker types, can be basically suitable for various rockers, is a rocker output and self-calibration device of an unmanned aerial vehicle control terminal with a self-calibration function and good universality, and can realize miniaturization, low cost and fitting engineering practice as much as possible by selecting a proper MCU (Microprogrammed Control Unit) chip.

The present invention discloses a two-dimensional differential Hall chip, a sensor element and a magnetic field measurement method thereof, wherein the two-dimensional differential Hall chip comprises: two groups of Hall pair chips arranged in a cross shape and a single magnetic concentrating layer located on the two groups of Hall pair chips; each group of Hall pair chips comprises two Hall chips distributed at intervals, one group of Hall pair chips in the two groups of Hall pair chips is symmetrically arranged along the x-axis in the horizontal direction, and the other group of Hall pair chips is symmetrically arranged along the y-axis in the vertical direction; the projection of the single magnetic concentrating layer on the Hall sensitive surface of the two groups of Hall pair chips covers the central area of ​​the two groups of Hall pair chips; the single magnetic concentrating layer covers at least part of the two groups of Hall pair chips, and the single magnetic concentrating layer is symmetrically arranged along the x-axis and the y-axis. The present invention realizes the high sensitivity, zero drift and large tolerance performance of the sensor element; realizes the miniaturization of the sensor element, and simplifies the magnetic field measurement method of the sensor element.

The invention discloses a three-dimensional integrated packaging structure and a packaging process thereof. The three-dimensional integrated packaging structure comprises a flip or normal chip with a functional surface and an opposite back surface; the rewiring layer and the chip are vertically stacked and electrically connected with each other; electrically leading the rewiring layer out of the packaging structure; the stacking direction of the inductor and the chip is parallel to the thickness direction of the chip, the inductor and the chip, the rewiring layer and the lead-out structure are physically isolated through an insulating medium layer, the inductor is of a spiral, multi-ring layer overlapping or sectional winding structure, the inductor comprises a magnetic core, a spiral coil surrounding the surface of the magnetic core is formed through etching and electroplating processes, and the lead-out structure is arranged on the surface of the spiral coil. The spiral coil comprises a circuit A, a circuit B and a circuit C, and the magnetic core and the spiral coil are encapsulated by the insulating medium layer. The inductor and the chip are stacked in an inverted or normal mode, the three-dimensional structure saves space, reduces parasitic inductance, resistance and the like, signal transmission is stable, electromagnetic interference is small, and the three-dimensional structure is suitable for the chip packaging field of miniaturization, high integration and the like.

The utility model provides a ring main unit. The ring main unit comprises a gas tank, a fixed frame fixed on the inner side wall of the gas tank, a circuit breaker switch and a three-position switch, wherein the circuit breaker switch and the three-position switch are positioned in the gas tank. The solid-sealed polar pole of the circuit breaker switch comprises a polar pole body, a movable end shielding seat and a static end shielding seat, the movable end shielding seat and the static end shielding seat are located at the two ends of the polar pole body, the movable end shielding seat and the static end shielding seat can wrap the two ends of the polar pole body respectively, and therefore the electrical connection position of the polar pole body is electrically isolated from the external environment; the pole body, the moving end shielding seat and the static end shielding seat are cast into a whole through insulating resin, so that the consistency of the pole is improved; the grounding shielding seat adopts an integrally formed metal piece, and can uniformly wrap a plurality of grounding contacts in a shielding space, so that the electric field distribution of the grounding contacts is optimized. According to the ring main unit, dry air can be used as insulating gas, miniaturization of the ring main unit is achieved, and the corresponding insulating performance is met.

The invention discloses a metasurface filtering antenna with high out-of-band rejection. The metasurface filtering antenna comprises a first dielectric substrate, a bonding layer and a second dielectric substrate which are sequentially arranged from top to bottom, wherein the central position of the upper surface of the first dielectric substrate is provided with a metasurface structure, the metasurface structure comprises four same rectangular metal patches, and the four rectangular metal patches are arranged in a 2 * 2 array; the upper surface of the second dielectric substrate is of a defected ground structure, and a rectangular gap and four U-shaped grooves are etched in the center of the defected ground structure, wherein the four U-shaped grooves are symmetrically formed in the two sides of the rectangular gap at equal intervals; the lower surface of the second dielectric substrate is a feed structure, and the feed structure comprises a microstrip line and an I-shaped branch strip connected with the microstrip line; the first dielectric substrate and the second dielectric substrate are connected through a bonding layer. The metasurface filtering antenna can achieve good filtering and radiation performance in a millimeter wave frequency band, and meanwhile is simple in structure and low in machining difficulty, thereby being beneficial to achieving miniaturization design of a millimeter wave system.

The invention provides a miniaturized spatial macro-energy ultraviolet single-frequency laser. The miniaturized spatial macro-energy ultraviolet single-frequency laser comprises a single-frequency pulse seed laser module, a three-stage amplifier and a nonlinear transformation module, the single-frequency pulse seed laser is a passively Q-switched single non-planar annular cavity and can output single-frequency 1064nm pulse laser of ten microfocus magnitude. The three-stage amplifier adopts a compact side pumping batten crystal structure, so that 1064nm single-frequency laser output with energy of 350mJ can be realized; by improving the output energy of the first amplifier, high-gain amplification of small-signal incident laser pulses is realized, and the pressure of subsequent amplification is reduced; the nonlinear transformation module can realize long-life and high-reliability ultraviolet single-frequency pulse output of hundred millijoule and hundred hertz by controlling the power density; the method can be used for satellite-borne hyperspectral laser radars, satellite-borne wind measurement laser radars and the like to obtain global meteorological information. The invention mainly solves the problems of miniaturization, high frequency stability and high reliability of the large-energy space ultraviolet single-frequency laser.

The embodiment of the invention provides a microresonator and a preparation method of the microresonator, the microresonator can be obtained by connecting an MIM plate capacitor and an inductor of a planar coil structure, and an upper electrode, a lower electrode and the inductor of the MIM plate capacitor and a microstrip line connecting the capacitor and the inductor are all prepared from superconducting materials. A dielectric layer of the MIM plate capacitor can be prepared by adopting an ALD technology, a dielectric film grown by adopting the ALD technology is very compact and has very good thickness uniformity, a relatively high dielectric constant can be realized, and the quality factor of the microresonator can be remarkably improved by combining the zero resistance characteristic of a superconducting material; and the miniaturization of the microresonator can be realized. Moreover, in the preparation process, the three layers of thin films for forming the capacitor and the inductor are formed through deposition firstly, and then the three layers of thin films are patterned layer by layer, so that introduction of excessive impurities can be avoided, interlayer contact can be optimized, and the risk of electric leakage can be reduced.

The invention discloses a manufacturing method of a multi-layer thermoelectric separation buried copper plate, which comprises the steps of preparing an inner-layer core plate, slotting and burying a copper block, roughly drilling a through hole, filling resin, manufacturing a secondary outer-layer pattern, preparing an outer-layer core plate, drilling a conductive hole and a heat dissipation hole and the like, and is characterized in that the copper block is divided into a heat dissipation area and a conductive area; thermoelectric separation is achieved through the design of independent through holes and blind holes, components needing to conduct electricity and components needing to conduct heat can be added on the copper block at the same time, and meanwhile efficient heat conduction and stable signal transmission are achieved and do not interfere with each other. Due to the partition design, the copper block is not only used for heat dissipation, but also used for electric conduction, the utilization rate of the copper block is improved, the design area of the PCB is reduced, and the development requirements of high-density and miniaturized electronic equipment are met.

The invention relates to the technical field of parts of conductive connecting devices, in particular to a connector busbar connecting structure. The connector busbar connection structure provided by the invention is an element change type invention and creation, the socket contact piece and the busbar do not need to be independently connected when the socket is installed by setting a conductive connection mode of plugging connection between the busbar and the socket contact piece, so that the installation process is simplified, and the installation efficiency is improved. And meanwhile, an operation space does not need to be reserved in the equipment, the miniaturization of the equipment can be realized, the socket contact piece and the busbar do not need to be independently disassembled when the socket is disassembled, the socket can be directly pulled out and taken down from the equipment panel only by disassembling the mounting bolt of the socket, and the later maintenance and replacement of the socket are relatively convenient.

The invention discloses an all-optical logic operation system and operation method based on a metasurface device, and mainly solves the technical problems that an existing optical logic gate is high in system complexity, not visual enough in judgment result, high in recognition difficulty, poor in practicability and the like. The logic operation system comprises a polaroid, an object plane, a metasurface device and a detector which are arranged in sequence. The polarizer is used for adjusting the polarization direction of incident light; a plurality of transparent target areas with different shapes are arranged on the object plane and are used for placing corresponding target images; the centers of all the target areas are uniformly distributed on a circle with the center of the object plane as the circle center and d as the radius; incident light reaches the metasurface device after passing through the polaroid and a target image on the object plane, optical logic operation is carried out through the metasurface device, and then the incident light is output to the detector for imaging. The invention has the advantages of simple structure, quick function switching, miniaturization, high integration and the like.

The invention discloses a multi-chip stacked packaging structure and a manufacturing method, and the manufacturing method comprises the steps: designing a welding spot which is downwards connected to a lower-layer chip and a welding spot which is upwards connected to an upper-layer chip on a metal frame according to the connection demands of a wafer, placing the wafer in a welding pad on the standardized metal frame, and carrying out the die bonding treatment, bonding the pin interconnection point of the wafer with the welding point through a connecting line to obtain an electric connection module; carrying out injection molding packaging on the electric connection module, then carrying out cutting processing to form a plurality of single chips, and carrying out test processing on the single chips; and stacking the plurality of qualified single chips on the circuit board in the vertical direction, and packaging the stacked structure in the single packaging cavity to obtain the multi-chip stacked packaging structure. According to the invention, through vertical stacking and single packaging cavity packaging, high integration level and miniaturized packaging are realized, the excellent thermal conductivity of the metal frame enables the heat dissipation performance of the chip to be improved, and the service life of the chip is prolonged.

The invention belongs to the technical field of communication, and particularly relates to an ultra-wideband miniaturized Vivaldi antenna. The antenna comprises a dielectric substrate, wherein the upper surface of the dielectric substrate comprises a main body Vivaldi antenna, four resistors, two rectangular metal patches and an artificial surface plasma, wherein the main body Vivaldi antenna is provided with an exponential gradually-changed slot; a feed network is arranged on the lower surface and comprises six impedance conversion microstrip transmission lines, a fan-shaped transmission line and a circular groove; the main body antenna and the dielectric substrate are placed in a centered alignment manner, the four resistors are placed at the tail end of the main body antenna, and the rear sides of the resistors are connected with the two rectangular patches; the artificial surface plasma is placed in the main body antenna gradual change gap; and the multi-section impedance transformer and the microstrip-to-slot line structure of the feed network are aligned with the circular slot of the main body antenna. According to the invention, the ultra wide band, miniaturization and high radiation gain are realized by designing the main body antenna, slotting the edge, loading the resistor, carrying out the artificial surface plasma and the like. The working frequency band of the antenna ranges from 0.2 GHz to 18 GHz, and the antenna has the characteristic of miniaturization.

The embodiment of the invention relates to the field of motors, and provides a motor, a camera module and electronic equipment. The motor comprises a lens carrier, a frame, a magnetic attraction mechanism and two sliding rail mechanisms, and the two sliding rail mechanisms are diagonally arranged between the frame and the lens carrier on a plane perpendicular to the optical axis direction of the lens and used for providing a sliding supporting face for movement of the lens carrier in the optical axis direction so as to reduce friction force. The magnetic attraction force generated by the magnetic attraction mechanism is used for making the lens carrier abut against the sliding rail mechanism. The two slide rail mechanisms are arranged diagonally and are uniform in structure distribution, so that the stress of the lens carrier is uniform, the stability of the structure is facilitated, the requirement of the motor for magnetic attraction force is reduced, the requirement of automatic focusing for driving force is reduced, the power consumption and the cost are reduced, the miniaturization design of the motor is facilitated, and the service life of the motor is prolonged. And the design difficulty is integrally simplified.

The invention belongs to the technical field of heat exchange, and particularly relates to a liquid metal enhanced heat exchange pipeline which comprises a pipeline body, an auxiliary heat exchange cavity and liquid metal. One end of the auxiliary heat exchange cavity is arranged on the pipeline body, and the other end of the auxiliary heat exchange cavity is far away from the pipeline body; the auxiliary heat exchange cavity is filled with the liquid metal. The auxiliary heat exchange cavity is filled with the liquid metal, and compared with a traditional cooling medium, the liquid metal can transfer heat more quickly by means of the ultrahigh heat conductivity of the liquid metal, the heat resistance is reduced, and the overall heat exchange efficiency is improved. In addition, due to the high thermal conductivity of the liquid metal and the optimized heat exchange structure, efficient heat exchange can be achieved in a more compact space, and the requirement for additional cooling fins or heat exchange assemblies is reduced. And compared with a traditional heat exchanger, the heat exchange power density of unit volume is higher, the heat exchanger is suitable for high-power electronic equipment, spaceflight heat dissipation systems and new energy heat exchange equipment, and the requirements for miniaturization and efficient heat dissipation are met.

The invention discloses a Ka-band four-tilt-beam magnetoelectric dipole antenna, and belongs to the technical field of millimeter wave radio frequency front-end devices. Based on a magnetoelectric dipole composite radiation structure, four centrosymmetric radiation units are integrated on a low-loss substrate. The antenna comprises a probe patch of a coaxial gamma-shaped feed probe, a radiation patch, a parasitic patch, an upper dielectric substrate, a lower dielectric substrate, a middle curing layer, a shorter metal through hole of the coaxial gamma-shaped feed probe, a longer metal through hole of the coaxial gamma-shaped feed probe, a metal through hole c of the radiation patch, a metal through hole d of the parasitic patch and a metal ground backboard, a probe patch, a radiation patch and a parasitic patch of the coaxial gamma-shaped feed probe are located on the upper surface of the upper-layer dielectric substrate, and a metal ground backboard is located on the lower surface of the lower-layer dielectric substrate; the antenna has ultra-wide impedance bandwidth, has the characteristics of low cost, miniaturization, low cross polarization and back lobe suppression, and is superior to a traditional inclined beam antenna and an antenna array scheme.

The invention discloses a notebook computer waste heat recycling system and method based on a thermoelectric conversion effect, and relates to the technical field of thermoelectric materials and devices, and the system comprises a distributed thermoelectric array module which is composed of a plurality of miniature TEG units, is distributed in a high heating area of a notebook computer, and directly generates power through temperature difference; the self-adaptive heat management module comprises a heat-conducting silica gel layer and micro heat dissipation fins and is used for optimizing the temperature difference between the hot end and the cold end; the multi-stage electric energy management module comprises a rectifying circuit, a DC-DC boosting chip and a recycling energy storage battery device, converts the unstable low-voltage direct current output by the TEG into stable electric energy, stores the stable electric energy and supplies the stable electric energy to target equipment; and the intelligent control module dynamically adjusts the working area of the micro thermoelectric power generation unit according to the data of the temperature sensor, preferentially selects the position with the maximum temperature difference to generate power, and matches the power supply demand through a PMIC chip. Efficient conversion and utilization of waste heat are realized through innovative design, the problem of low thermoelectric conversion efficiency in miniaturized equipment is solved, and energy conservation and environmental protection are realized.