105 results about "Thermoelectric effect" patented technology

The invention provides an aerogel-based heat-preservation, heat-insulation and waterproof composite coating material for a building outer wall and a preparation method thereof, and belongs to the field of building materials. Through hydrophobic modified silicon dioxide aerogel, a lightweight heat insulation frame is provided, and the waterproofness and compatibility are improved; the mechanical property and the crack resistance are enhanced through the modified potassium titanate nanofibers, and self-adaptive heat insulation is achieved; the thermoelectric effect, the wear resistance and the thermal regulation performance are optimized through plasma treatment and polyaniline coated tungsten carbide nanoparticles; the heat management performance, the crack resistance and the comprehensive heat insulation and waterproof capacity are improved through graphene oxide composite modified boron nitride; the flexibility, the hydrophobicity and the interfacial compatibility are improved through organic silicon modified bisphenol A epoxy resin; and the performance of the coating is optimized through the synergistic effect of the components.

The invention provides a device-level thermoelectric effect parameter identification method and system based on a least square method. The function relation between thermoelectric effect parameters and the temperature of the hot end and the cold end of a thermoelectric device can be obtained. According to the method, dominant parameters of a working thermoelectric device are collected and measured, wherein the dominant parameters comprise the open-circuit voltage, the cold and hot end temperature, the cooling medium inlet and outlet temperature and the sizes of the thermoelectric device and thermoelectric particles; and under various temperature conditions, the dominant parameters are utilized to calculate thermoelectric effect parameters of the thermoelectric device. And for each thermoelectric effect parameter, constructing a function relationship between the thermoelectric effect parameter and the temperature of the hot end and the cold end by using a least square method, and completing identification of the device-level thermoelectric effect parameter. According to the method, macroscopic fitting of thermoelectric effect parameters is realized, and the precision of a simulation model is improved and the calculation time of the model is shortened by accurately identifying the thermoelectric effect parameters of a main component, namely a thermoelectric device, in the thermoelectric power generation system.

The invention discloses a preparation method and a use method of a concrete wall with self-heating, phase change energy storage and thermoelectric effects, and belongs to the technical field of novel wall materials. In order to develop a multifunctional intelligent concrete wall, cement, water, fine aggregate and coarse aggregate are weighed according to the mass ratio of 1: (0.2-1): (1.3-3): (2.5-5), a conductive material accounting for 0.8-3% of the volume of concrete is weighed, a packaging phase change material accounting for 2-10% of the mass of the cement is weighed, the conductive material, the cement, the fine aggregate and the coarse aggregate are put into a stirring machine, and the stirring machine is used for stirring; after uniform stirring, water is added for continuous stirring, in the process, a packaging phase change material is added and stirred to be uniform, functional cement concrete is obtained for wall pouring, a positive electrode or a negative electrode is inserted into a wall seam during wall pouring, an insulating layer is used for blocking, and an insulating layer is arranged on each of the inner side and the outer side of the functional cement concrete wall; and the wall is maintained for a certain time after being poured. The wall body disclosed by the invention has multiple functions.

The invention discloses a high-heat-power thermoelectric cell hydrogel for low-grade heat energy collection and a preparation method thereof, and belongs to the technical field of heat energy recovery. The polyacrylamide hydrogel is selected as a substrate of the thermoelectric cell hydrogel, so that a hydrogel internal structure which is easy to regulate and control can be obtained; excellent hydrogel stretchability is obtained by using a cross-linking agent and an initiator with relatively low concentration; potassium ferricyanide and potassium ferrocyanide are used as redox ions to generate a thermoelectric effect, so that stable P-type thermal power is obtained; by using guanidine hydrochloride, the solvation entropy difference between potassium ferricyanide and potassium ferrocyanide is enlarged, and the thermal power of the hydrogel in the thermoelectric cell is greatly improved; sodium pyrrolidone carboxylate is used, so that the concentration of ions in the hydrogel is further improved, the conductivity of the thermoelectric cell hydrogel is improved, meanwhile, a hydrogen bond network between water molecules is destroyed, and the water-retaining property of the thermoelectric cell hydrogel is improved.

According to the mass concrete temperature field self-adaptive thermoelectric coordinated regulation and control system and method, the temperature difference between the inside and the outside of mass concrete is reduced through active directional heat transfer and self-adaptive thermal resistance regulation. The flexible thermoelectric thin film device prepared by the invention has high flexibility, high thermoelectric efficiency and strong environmental adaptability, and can meet the temperature control requirement of mass concrete, and the manufacturing process is compatible with the existing microelectronic processing technology, so that the flexible thermoelectric thin film device has large-scale production potential; the flexible thermoelectric device is attached to the surface of concrete, directional transmission of heat between the concrete and the thermoelectric module from a high-temperature area to a low-temperature area is achieved by switching the current direction through the Peltier effect, temperature balance is achieved completely through the active thermoelectric effect and passive heat conduction optimization, the temperature lag and durability defects of a phase change material are avoided, and the service life of the concrete is prolonged. And the heat transfer efficiency is improved through the heat conductivity coefficient gradient and the thermally induced variation characteristic of the gradient heat conduction interface material layer.

The invention belongs to the technical field of refrigerants, and particularly relates to a visual measuring device and method for refrigerant liquid drops, and the device comprises a liquid drop sampling system, and a sampling cabin is connected with a capillary needle tube through a sampling valve, and the capillary needle tube is arranged along the gravity direction; a capillary needle tube of the high-pressure visualization system extends into an observation bin communicated with the sample injection bin; the visible windows are arranged on the opposite side walls of the observation bin, the observation platform is fixed in the observation bin and located between the visible windows and below the capillary needle tube, and the thermoelectric effect semiconductor is arranged on the observation platform; the pressure control system, the electric heating module and the semiconductor chilling plate are arranged on the sample injection bin, and the pressure micro-control unit is electrically connected with the two; the optical imaging system, the high-speed camera and the light source are arranged outside the visible window, and the computer is electrically connected with the two. Compared with the prior art, the problems that in the prior art, high-pressure sampling equipment which is high in cost and complex in operation is needed, and only the liquid drop contact angle can be measured are solved. According to the scheme, through the gravity action of the liquid working medium, sample injection in a high-pressure environment is achieved, and high-pressure sample injection equipment is not needed.

The invention discloses a high-temperature strain film sensor for detecting thermal stress of a small square billet crystallizer, and relates to the technical field of sensors, the high-temperature strain film sensor comprises a composite system formed by fiber structures, the fiber structures are interwoven and interspersed, and the composite system sequentially comprises a substrate layer, a high-temperature insulating layer, a piezoelectric film layer and a multifunctional composite layer from bottom to top; a channel is arranged in the piezoelectric film layer, the channel penetrates to the high-temperature insulating layer and the multifunctional composite layer, and the channel is connected with external equipment through a lead electrode. The multifunctional composite layer comprises a thermocouple array and a sensitive grid unit which are distributed in parallel and interwoven, and the thermocouple array is used for superposing the thermoelectric effect and increasing the output situation; the sensitive grid unit is used for converting strain of the crystallizer steel pipe into electric signals through sensitive grid deformation and outputting the electric signals, and real-time measurement of stress and strain on the surface or in the crystallizer is achieved. The sensor designed by the invention is good in high temperature resistance, good in structural stability, long in service life and high in measurement precision.

The invention relates to the technical field of thermoelectric effect and heat flux density detection, and discloses an atomic layer thermopile heat flux sensor with water cooling and preparation and assembly methods, the heat flux sensor comprises a sensor chip and a cooling assembly, the bottom layer of the sensor chip is a substrate layer with the 001 crystal face beveled by 15 degrees, and the bottom layer of the sensor chip is a substrate layer with the 001 crystal face beveled by 15 degrees. A layered heat flow sensitive film on the substrate is a YBa2Cu3O7-delta film grown through pulse laser deposition, and double-layer metal electrodes are prepared at the two ends of the surface of the YBa2Cu3O7-delta film; and the cooling assembly is used for carrying out water cooling on the sensor chip and packaging the sensor chip. According to the invention, a YBa2Cu3O7-delta thin film with a large inclination angle is prepared on a single crystal lanthanum aluminate LaAlO3 substrate which is beveled by 15 degrees; the high-temperature-resistant Ni / Pt and Ni / W double-layer electrode is prepared on the surface of the YBa2Cu3O7-delta thin film, annealing is carried out, the contact strength of the YBa2Cu3O7-delta thin film and an electrode material is improved, the contact resistance is reduced, and the electric signal strength is improved; the cooling assembly improves the stability of the device in a large-heat-flow and long-time working scene.

The present invention addresses the problem of providing a non-linear thermoelectric effect measurement device, a non-linear thermoelectric effect measurement method, a non-linear thermoelectric effect measurement program, a recording medium, a temperature fluctuation environment power generation element, and a temperature fluctuation sensor, whereby temperature fluctuations can be converted into electric energy by a non-linear thermoelectric effect and detected. To this end, a nonlinear thermoelectric effect measurement device for measuring a nonlinear thermoelectric effect generated in a sample is provided with: a temperature gradient generation unit for generating a temperature gradient in the sample; and a potential difference measurement unit that measures a potential difference V generated in the sample, the temperature gradient generation unit being provided with: a first heating unit that is provided on one surface of the sample; and a second heating unit that is provided on the other surface of the sample that faces the one surface, and that applies a first current jc1 = Idc1 + I1sin ([omega] t + [phi]) to the first heating unit and applies a second current jc2 = Idc2 + I2sin ([omega] t) to the second heating unit.

An integrated configurable photodetector with an ultra-high circular polarization extinction ratio and a preparation method therefor are provided. The photodetector includes a metal reflective layer, a dielectric layer, an electrode layer, and a two-dimensional material layer. The electrode layer includes symmetrically arranged Z-shaped metallic optical antenna arrays which are respectively integrated with a source electrode and a drain electrode and have opposite chirality. The photodetector operates at zero bias state, and a photo-response is photovoltaic effect, hot electron injection, photo-thermoelectric effect and so on induced by a Schottky junction composed of the source electrode, the drain electrode and the two-dimensional material. By adjusting the distribution of the incident light in the source and drain electrode regions, under specific Circularly polarized light, photocurrents of equal magnitude but opposite directions cancel each other out, resulting in a net output of zero and significantly reducing noise.

The invention provides an ionic gel material, a carbon micron tube ionic thermoelectric supercapacitor and a preparation method and application of the carbon micron tube ionic thermoelectric supercapacitor, and belongs to the technical field of electrical materials.The preparation method comprises the steps that carbon micron tube dispersion liquid, gelatin and potassium chloride are evenly mixed according to the proportion, formed and dried, and CMTs / KCl / gelatin ionic thermoelectric gel with the thermoelectric pressure and temperature multifunctional sensing characteristic is prepared; and the flexible stretchable ion thermoelectric supercapacitor is assembled by taking the CMTs / KCl / gelatin ion thermoelectric gel as an electrolyte and taking the CMTs / MnO2 / foamy copper electrode. The CMTs / KCl / gelatin ion thermoelectric gel has thermoelectric effect and temperature and pressure sensing monitoring capability, and the prepared capacitor can be used as an energy storage device, has good electrochemical performance, realizes conversion and storage from heat energy to electric energy, especially realizes thermal voltage output under low temperature gradient, and has wide application prospect. The device can be used for converting low-order heat energy into electric energy and storing and utilizing the electric energy in real time.

The invention belongs to the technical field of battery cooling, and relates to an all-vanadium redox flow battery cooling system, which comprises a first heat dissipation module, a second heat dissipation module, a radiation refrigeration film, a solid adsorption refrigeration module and a thermoelectric refrigeration module, and the circulating conveying module is used for conveying the cooling capacity generated by the solid adsorption refrigeration module and the cooling capacity generated by the thermoelectric refrigeration module to the first heat dissipation module and the second heat dissipation module and taking away the heat of the first heat dissipation module and the second heat dissipation module. The cooling capacity can be generated through adsorption and desorption circulation of the solid adsorption refrigeration module, and the cooling capacity is generated through the thermoelectric effect of the thermoelectric refrigeration module, so that the circulation conveying module can convey the cooling capacity generated by the solid adsorption refrigeration module and the cooling capacity generated by the thermoelectric refrigeration module to the first heat dissipation module and the second heat dissipation module correspondingly; and the heat of the first heat dissipation module and the second heat dissipation module is taken away, so that the heat dissipation effect is improved, the energy consumption is reduced, and the charge and discharge performance of the battery is not influenced.

The utility model discloses a kind of cooling devices of cable fusion joint construction, including shell and cooling device;Cooling device includes support plate, several fins equidistant below support plate, fixed with mounting plate below fin, semiconductor refrigeration piece is installed with the contact of fin on the surface of mounting plate;Elastic component, cooling device is installed with shell through elastic component;The both ends of cooling device are equipped with pressing mechanism, after cable fusion is completed, the joint part of fusion is placed on support plate, semiconductor refrigeration piece it utilizes the thermoelectric effect of semiconductor to carry out refrigeration, can quickly reach cooling purpose, the top of pressing rod is semicircular arc, can be used for hanging on cable, pressing rod provides weight and presses down cable on support plate, pressing rod can provide additional pressing-down force, help cable better adhere on support plate, further ensure the good contact between cable and support plate, to improve cooling efficiency.

The invention relates to a graphene-based energy source used in heat meters located in independently heated or cooled spaces, where a graphene-based nano-composite is utilized instead of a battery. It generates electrical energy by leveraging the temperature difference between the heating water flowing through the meter and the ambient temperature, using the Seebeck effect of thermoelectricity. This innovation eliminates the need for batteries in heat meters by transforming the meter itself into a source of energy.

The invention provides an AI active flow control single-phase immersed heat dissipation system and a data center. The system comprises a micro thermoelectric effect sensor array, a distributed acoustic transducer array, a micro electro mechanical system pump valve network and a system controller, wherein the micro thermoelectric effect sensor array and the distributed acoustic transducer array are arranged in a cabinet, and the micro electro mechanical system pump valve network is integrated in a flow channel. The controller cooperatively controls the acoustic transducer array to emit coded sound waves and receive echoes, and reconstructs a three-dimensional flow velocity field in the cabinet based on the computational tomography principle; meanwhile, reading of the thermoelectric effect sensor array is obtained and processed into a three-dimensional heat flow vector field; and finally, generating a control instruction based on the two three-dimensional fields, and independently driving each pump valve in the pump valve network of the micro-electro-mechanical system to perform targeted heat dissipation. The core problems of information asymmetry and control granularity mismatch in an existing immersed heat dissipation technology are fundamentally solved, and conversion from macroscopic passive heat dissipation to microcosmic active flow control is achieved.

The invention discloses a synchronous test device and method about a heat exchange temperature field and structural deformation, and belongs to the technical field of air valve heat fluid-solid coupling test equipment.The synchronous test device comprises a temperature rise section, a test bin, a temperature drop section and a tracing release device, the front end of the temperature rise section is connected with the test bin, and the top of the test bin is provided with a laser scanner; the temperature drop section is used for displaying tracer particles, an axial flow fan is arranged in the temperature drop section and used for driving airflow to circularly flow in the device, the heat conduction liquid is located in the temperature drop section, meanwhile, the axial flow fan is immersed in the heat conduction liquid, the heat conduction liquid is used for absorbing heat in the temperature rise section so that the temperature of the heat conduction liquid can be increased, and the temperature rise section is used for increasing the temperature of a flow field in the device. Therefore, the actual working condition of the air valve is simulated. During use, the axial flow fan can convert heat into electric power through the thermoelectric effect to drive the axial flow fan to operate, and due to the fact that the speed increasing pipe is communicated with the axial flow fan, tracer particles flow through the heat exchanger air valve after being heated through the temperature rising section so as to display the specific state of a flow field.

The invention discloses an intelligent control method for a semiconductor cold-heat exchanger, which comprises the following steps of: (1) analyzing and processing working data during operation of the semiconductor cold-heat exchanger, so that temperatures at two ends of the semiconductor cold-heat exchanger are different, and a thermoelectric effect is generated; (2) charge carriers are formed through the thermoelectric effect, so that electron holes on one side of the semiconductor material and electrons on the other side of the semiconductor material are diffused; (3) the movement of the charge carriers in the semiconductor material can generate current; the power conversion circuit is connected with the control circuit and converts the generated current into power; (4) the heat of the semiconductor heat exchanger is exchanged through power conversion; (5) the low-temperature part on the other side of the semiconductor heat exchanger radiates heat through a radiator; and (6) the internal temperature and the external temperature of the semiconductor cold-heat exchanger are analyzed through the swarm intelligence algorithm. According to the method, the heat dissipation efficiency of the semiconductor cold-heat exchanger is improved, and the use cost of equipment is reduced.

The invention discloses a two-dimensional indium selenide optical sensor with a motion trail recognition function and a preparation method thereof. The light sensor device comprises a SiO2 / Si substrate, a gamma-InSe semiconductor light absorption layer located on the substrate and asymmetric Au electrode structures arranged at the two ends of the light absorption layer. A gamma-InSe semiconductor material with a non-centrosymmetric structure is selected, and an asymmetric electrode configuration design is combined, so that the device generates a photo-pyroelectric effect and a photo-thermoelectric effect under the condition of temperature change caused by illumination, and remarkable positive and negative pyroelectric response peak current is formed in a zero-bias self-driven mode. The device can directly analyze and reconstruct the motion trail of an object according to the dynamic behavior of the reverse attenuation current after light removal, does not need to depend on an external calculation unit, and achieves the function of integrating light perception, information storage and motion trail calculation in a single device.

The invention discloses a device for manufacturing a magnesium-based composite material through a follow-up magnetic field assisted infrared and blue light composite laser additive and application of the device, and belongs to the technical field of metal-based composite material preparation. Through wavelength complementation of infrared laser and blue laser and interaction of thermocurrent driven by a thermoelectric effect and a follow-up magnetic field, the stability of a molten pool in the process of laser directional energy deposition of the magnesium-based material is remarkably improved, the defects of pores and the like are reduced, uniform distribution and ordered orientation of reinforced particles in a matrix are achieved, and the mechanical property of the magnesium-based material is improved. And meanwhile, the yield strength, ductility and compactness of the magnesium alloy material are improved, and the forming process is stable, safe and reliable.

The invention discloses a liquid metal passive self-driven thermal control system and method based on thermoelectric effect and magnetic field cooperation, and belongs to the technical field of thermal control of electronic equipment. The two end faces of the thermoelectric module are tightly attached to the heating device and the cold plate respectively. The thermoelectric module comprises a ceramic substrate, and an electrode is electroplated on the surface of the ceramic substrate; between the ceramic substrates, the thermoelectric crystal grains are electrically connected in series and thermally connected in parallel to form a columnar array, the columnar array is welded on the electrodes, and an external wire is welded. The electrode is embedded into the wall surface of the cold plate and connected with the output end of the thermoelectric module, the potential difference generated by the thermoelectric module is applied to the electrode, and current is formed in the liquid metal; the liquid metal working medium is sealed in the cold plate, the electrified liquid metal working medium is subjected to the effect of Lorentz force under the effect of an external magnetic field, liquid metal is driven to flow in one direction, and heat exchange is enhanced. Reliable technical support is provided for efficient heat dissipation of the electronic equipment.

This invention provides a porous aggregate for road surface cooling, a modified asphalt mixture, and a preparation method thereof, made from the following raw materials: mineral aggregate, road asphalt, porous aggregate for road surface cooling, surface treatment agent I, and surface treatment agent II. The porous aggregate for road surface cooling is made from the following raw materials: bornite powder, nano-titanium carbide, starch, 1,4-butanediol diacrylate, and hydroxypropyl methylcellulose. Compared to the single-level cooling of existing asphalt pavement "active cooling" technologies, the modified asphalt concrete of this invention has a triple cooling effect, including thermoelectric effect, heat insulation function, and reflection of sunlight, significantly improving the cooling efficiency of asphalt pavement during the high-temperature period in summer.

The utility model relates to the technical field of mobile phone accessories, in particular to a mobile phone support with a refrigeration function, which comprises a clamping body, a supporting rod, a base and a refrigeration device. The refrigeration device comprises a control circuit, a semiconductor refrigeration sheet and a water cooling circulation system, one face of the semiconductor refrigeration sheet is attached to the front shell of the clamping body, and the other face of the semiconductor refrigeration sheet is attached to the water cooling circulation system. Therefore, according to the mobile phone support, the semiconductor chilling plate is arranged in the clamping body, and one side of the semiconductor chilling plate is tightly attached to the front shell in direct contact with the mobile phone, so that heat generated by the mobile phone is effectively absorbed through the thermoelectric effect of the semiconductor chilling plate, and the mobile phone is refrigerated. And the other surface of the semiconductor chilling plate is attached to the water-cooling circulating system, so that the water-cooling circulating system can quickly take away heat dissipated by the water-cooling circulating system in the refrigeration process, and the long-term good working state of the semiconductor chilling plate is maintained. The water cooling circulation system reduces the temperature of the semiconductor chilling plate through circulating cooling water, so that the temperature of the mobile phone can be continuously reduced.

The utility model relates to the technical field of platelet analyzer equipment, in particular to a platelet analyzer capable of eliminating external interference, which is characterized in that the lower surface of a machine body is fixedly connected with a base, the front surface and the rear surface of the machine body are respectively provided with two ventilation openings, and the front surface of the machine body is fixedly connected with a power socket between the two ventilation openings; by arranging the environment sensor, the central electric control unit, the insulation box, the electrode, the P-type semiconductor and the N-type semiconductor, a user can monitor the environment change through the environment sensor, and the environment change can be monitored through the N-type semiconductor. The central electric control unit changes the current of the P-type semiconductor and the N-type semiconductor to enable the heating and cooling ends to work, the temperature environment of the machine body is accurately regulated and controlled, the optimal working condition is ensured, meanwhile, the partition plate isolates the detection device from the thermoelectric effect device, and meanwhile air circulation is allowed to help heat dissipation and maintain the temperature balance of the system.

The present application relates to the technical field of gutta-percha cutters, and discloses a gutta-percha cutting control circuit, a method and a gutta-percha cutting device. In the control circuit, the working tip comprises a first conductor and a second conductor which are in contact with each other and form a thermocouple structure; a driving circuit is used to drive the working tip to heat based on a PWM driving signal; a main controller is used to acquire a current signal of the working tip and a thermoelectric electromotive force signal between the first conductor and the second conductor, to operate the current signal and the thermoelectric electromotive force signal, and to adjust and output the PWM driving signal to control the temperature of the working tip. The heat generating component is directly reused as a temperature sensing element by using the thermoelectric effect, without the need to additionally install a temperature control probe in the limited space of the working tip, and the temperature electrical signal is directly acquired from the heat source, thus fundamentally solving the problem of inaccurate temperature control caused by the fact that sensors cannot be installed at the front end of small medical devices due to insufficient space, and greatly improving the safety of clinical operations.

The invention discloses an efficient negative oxygen ion film and a preparation process thereof, and relates to the technical field of functional new materials, the efficient negative oxygen ion film sequentially comprises an electron resonance layer and a nano tourmaline layer from bottom to top, the electron resonance layer comprises a latticed carbon fiber net, and a plurality of thin-film solar cells are arranged on the carbon fiber net; and electrodes of the plurality of thin-film solar cells are respectively connected with the carbon fiber net. A thin film solar cell is creatively adopted to generate a weak electromagnetic field and a thermoelectric field effect technology principle; the tourmaline generates a polarization effect and conductivity under the action of a magnetic field, generates a thermoelectric effect under the action of temperature change, and generates a piezoelectric effect under the action of mechanical pressure, so that charges can be further excited, the ion moving speed in the tourmaline is improved, the release of the negative oxygen ions is improved, and the negative oxygen ions exist in a wider range.

The invention discloses a laser power detector based on a surface plasmon enhanced photo-thermoelectric effect and a preparation method thereof, and the detector is provided with a lower nanometer metal film layer, a lower photo-thermal conversion layer, a middle heat transfer layer, an upper oxide insulating film layer, an upper metal thermoelectric function layer and an upper oxide protection layer from bottom to top in sequence. And the positive electrode lead and the negative electrode lead are connected to the upper metal thermoelectric functional layer to serve as output ports of the detector. When laser irradiates the front face of the detector, metal nanoparticles in the lower photothermal conversion layer greatly enhance light absorption through the local surface plasmon resonance effect, generated heat enables the upper metal thermoelectric function layer to generate temperature difference in a heat conduction mode, and then thermoelectric force is generated at the two ends of the electrode due to the Seebeck effect. Therefore, laser power detection is realized. The device has the characteristics of simple structure, high sensitivity, wide spectral response, insensitivity to a detection angle and the like.

According to the technical scheme, the heat dissipation device based on the solid-state microwave source comprises a solid-state source and a heat dissipation sheet, the solid-state source is fixedly installed on the heat dissipation sheet, a refrigeration sheet is arranged between the solid-state source and the heat dissipation sheet, a fan is installed on the periphery of the heat dissipation sheet, the refrigeration sheet is embedded in the heat dissipation sheet, and the heat dissipation sheet is fixedly installed on the heat dissipation sheet. The cold end of the refrigeration sheet is installed at the heating end of the solid-state source, the cooling sheet is installed at the hot end of the refrigeration sheet, and the solid-state source, the refrigeration sheet and the cooling sheet have the same section shape and are arranged in equal proportion. Compared with the prior art, the heat dissipation device has the advantages that the thermoelectric effect of the semiconductor chilling plate is utilized, heat is effectively transmitted to the cooling fins from a solid-state source, then the heat dissipation efficiency is improved, compared with a scheme only depending on a traditional cooling fin and a traditional fan, the heat can be dissipated more quickly and more effectively through introduction of the semiconductor chilling plate, and the heat dissipation efficiency is improved. Therefore, the working temperature of the solid-state source is reduced, and the service life of equipment is prolonged.

The invention discloses a passive embedded sound wave acquisition type concrete temperature measuring device and method in the technical field of measuring equipment. The passive embedded sound wave acquisition type concrete temperature measuring device comprises a shell; the temperature sensor is attached to the shell; the control unit is used for receiving temperature measurement data of the temperature sensor and sending the temperature measurement data to the background receiving device; the hot end and the cold end are arranged at the two ends of an inner cavity of the shell, and the P-type semiconductor and the N-type semiconductor are connected to the hot end and the cold end. The power supply group is connected with the control unit and the temperature sensor through wires. The one-way heat release part releases heat for the cold end, and the one-way heat absorption part supplies heat for the hot end; an intelligent temperature measuring device is pre-embedded into concrete to detect the internal temperature of the concrete in real time, a device power source is generated according to the thermoelectric effect principle, a large amount of heat energy in the concrete is converted into electric energy, and after the internal temperature of the concrete is balanced, the device can automatically stop; the concrete temperature detected in real time can be monitored in real time by acquiring data through a background.

The invention provides low-temperature-resistant persistent purification vehicle-mounted activated carbon and a preparation method thereof, and belongs to the technical field of activated carbon. According to the invention, two functional materials are compounded on the activated carbon, so that a self-driven chemical regeneration purification system is constructed. Wherein the gallium-doped zinc oxide nanorod generates an instantaneous pyroelectric surface potential difference as an internal electrochemical driving force of the system when the environment temperature is changed by utilizing the enhanced pyroelectric effect of the gallium-doped zinc oxide nanorod; the cesium phosphotungstate-coated cerium dioxide particles serving as a pollutant oxidizing agent are used for converting soluble phosphotungstic acid into insoluble cesium salt, so that the long-term stability of the cesium phosphotungstate-coated cerium dioxide particles in a humid environment is improved; a pyroelectric surface potential difference induced by temperature fluctuation is distributed and conducted in a conductive network, so that electrons can be extracted from a reduced center, the high valence state of the electrons is recovered, and online regeneration of the electrons is completed; due to the synergistic effect, the material can self-maintain catalytic activity by utilizing the environmental temperature difference, so that long-acting and persistent purification under the dark and low-temperature conditions is realized.

A position-sensitive detector derived from heat transfer principles and thermoelectric effect that detects the position of a single heat spot on the detection surface precisely includes a substrate electrically insulating least on a surface, a thermoelectric film applied or deposited to the substrate, a first metallic contact on a first side of the thermoelectric film, and a second metallic contact on a second side of the thermoelectric film. The thermoelectric detector is configured to determine a position of a point heat source on the substrate by measuring an electrical potential difference between the first metallic contact and the second metallic contact.