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73results about How to "Improve temperature stability" patented technology
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Temperature control device and oscillator
InactiveUS20150130546A1shorten the temperature stabilization timeReduced Temperature Stability RequirementsRadiation pyrometryThermometers using electric/magnetic elementsTemperature controlUnit operation
A temperature control device includes a temperature detector, a difference operation unit, a controller, a saturation processing circuit unit, a rewritable storage unit, and a conversion unit. The difference operation unit operates a digital value corresponding to a difference value between a detected temperature value and a target temperature. The controller calculates a manipulated variable using the digital value operated by the difference operation unit. The saturation processing circuit unit includes a digital circuit to limit an output value of the controller to a pre-set upper limit value. The rewritable storage unit stores the upper limit value read from a storage area of the rewritable storage unit and input into the saturation processing circuit unit. The conversion unit converts the output value of the saturation processing circuit unit into an analog signal to output the converted value as a control command value to the heater.
Owner:NIHON DEMPA KOGYO CO LTD
High power supply rejection ratio band-gap reference circuit with base current correction and high-order temperature compensation
PendingCN121957269AHigh suppression ratioDoes not significantly increase complexityElectric variable regulationHemt circuitsControl theory
The invention discloses a high-power-supply-rejection-ratio band-gap reference circuit with base current correction and high-order temperature compensation, which comprises a pre-voltage-stabilizing circuit module used for generating and outputting internal power supply voltage according to external power supply voltage, the internal power supply voltage is supplied to the band-gap reference core circuit module so as to isolate transmission of power supply noise to reference output; the high-order temperature compensation circuit module is used for generating nonlinear compensation current according to the bias voltage; the band-gap reference core circuit module is used for generating current in direct proportion to absolute temperature, reference voltage and reference output voltage based on internal power supply voltage and feeding back the reference voltage to the pre-voltage-stabilizing circuit module to serve as bias reference; and the base current correction circuit module is used for sampling the base current of the bipolar transistor in the band-gap reference core circuit module. On the premise that the circuit structure and the power consumption are reasonable, the temperature drift of the reference voltage is reduced, and the power supply suppression capability is improved.
Owner:WUZHOU UNIV
Base particle vortex mediated near-room-temperature ultralow-resistance material
PendingCN122000110Alower resistancereduce manufacturing costConductive layers on insulating-supportsChemical industryCopper conductorNew energy
The invention relates to the technical field of low-resistance conductive materials, and particularly discloses a base particle vortex mediated near-room-temperature ultralow-resistance material which comprises a main body material and a regulating medium, the main body material is a doped transition metal oxide or a carbon-based composite material; the regulation and control medium is a low-atomic-weight doping agent; the doped transition metal oxide is La-doped SrTiO3 or Nb-doped TiO. Compared with a traditional copper conductor, the material has the advantages that the resistance is obviously reduced, the energy loss in the electron transmission process can be greatly reduced, the energy efficiency of electronic equipment and new energy equipment can be obviously improved, the material can adapt to the environment temperature change of most indoor and outdoor engineering application scenes, and the application prospect is wide. The problem that part of low-resistance materials are poor in temperature stability is solved, the reliability of long-term operation of devices is guaranteed, conventional processes and equipment such as magnetron sputtering, spin coating and pyrolysis, tube furnace doping and mechanical bending are adopted in the whole process, the operation process is clear and easy to understand, and large-scale production can be achieved in common material laboratories or small and medium-sized production workshops.
Owner:严守权
Aerosol generating product
PendingCN121986960AReduce dry burningReduce energy consumptionCigar manufactureInterfacial thermal resistanceMechanical engineering
The invention discloses an aerosol generating product and an aerosol generating system.The aerosol generating product comprises an aerosol forming base material sheet and a magnetic heating body sheet, and the magnetic heating body sheet and the aerosol forming base material sheet are arranged in a stacked mode in the thickness direction and attached in the stacked area in a surface contact mode; the main heat conduction path directed from the magnetic heating element sheet to the aerosol-forming substrate sheet is a path passing through the thickness direction of the laminated region. Compared with the prior art, the magnetic heating body sheet and the aerosol forming base material sheet are laminated along the thickness direction, and the surface contact is realized in the lamination area, so that the main conduction path of heat from the magnetic heating body sheet to the base material is a short path passing through the lamination thickness direction; therefore, heat conduction distance is shortened, interface thermal resistance is reduced, and heating response speed and energy utilization rate are improved. And meanwhile, the base material is heated more uniformly, so that the aerosol generation efficiency and consistency are improved, and the risk caused by local overheating is reduced.
Owner:郭洪礼
A method for preparing texture of high-performance bismuth titanate-barium titanate lead-free piezoelectric ceramic
ActiveCN118771873BIncrease the proportion of preferential orientationImprove piezoelectric performanceBarium titanatePhysical chemistry
The invention discloses a texture preparation method for high-performance lead-free piezoelectric ceramics of bismuth ferrite-barium titanate. The general formula of the ceramic composition is as follows, where the molar fraction ratio of BiFeO3 and BaTiO3 is 2:1, x, y, t, and m all represent molar fractions, and 0 < x ≤ 0.05, 0 < y ≤ 0.05, 0 < t ≤ 0.05, 0 < m ≤ 0.05. In the sintering stage of the invention, a temperature gradient field is constructed to make the ceramic grains grow texture-directionally, and a textured piezoelectric ceramic with a piezoelectric constant d 33 reaching above 1000 pC / N at 350 °C and a T dr reaching above 350 °C is obtained. The preparation process of the invention is simple, and the prepared ceramic has excellent high-temperature performance and can be applied to the field of high-temperature piezoelectricity.
Owner:GUANGDONG HUST IND TECH RES INST
Large dynamic range, large aperture and high precision on-board blackbody radiation source and temperature control method thereof
PendingCN122084124AImprove temperature uniformityImprove temperature stabilityRadiation pyrometryTemperature controlBlack-body radiation
This application relates to the field of infrared remote sensing instrument calibration technology, and provides a high-dynamic-range, large-aperture, high-precision on-board blackbody radiation source and its temperature control method. The main body of this on-board blackbody radiation source is temperature-controlled by a refrigerator, exhibiting a large dynamic range, capable of temperature control from 200K to 310K. Through a three-layer structure consisting of the radiation source cavity, a cooling inner shell, and an outer shell, zoned temperature control via a heat transfer bracket, and a three-layer thermal insulation installation design, the temperature uniformity and stability of the blackbody radiation source are significantly improved, with temperature uniformity exceeding 30mK. Simultaneously, it possesses high emissivity (spectral emissivity reaching 0.998) and an aperture as large as 310mm, meeting the requirements for large field-of-view, long-distance use.
Owner:SHANGHAI INSTITUTE OF TECHNICAL PHYSICS CHINESE ACADEMY OF SCIENCES
All-quartz resonant pressure sensor without lead packaging
PendingCN121954313Areduce thermal stressImprove temperature stabilityFluid pressure measurement using piezo-electric devicesSilver pasteElectrical connection
A lead-free packaged all-quartz resonant pressure sensor comprises a 3J21 alloy shell cover, the 3J21 alloy shell cover is connected with a 3J21 alloy shell in a sealed mode, and a quartz island film pressure conversion unit, a quartz resonant layer element and a quartz base component which are connected through a vacuum glass frit sealing technology are arranged in an inner cavity formed by the 3J21 alloy shell cover and the 3J21 alloy shell. Glass frit dielectric layers are arranged between the quartz island film pressure conversion unit and the quartz resonance layer element as well as between the quartz resonance layer element and the quartz base part; three quartz layers and two glass frit dielectric layers are connected to form an all-quartz pressure chip; the all-quartz pressure chip, the 3J21 alloy shell and the gold-plated lead column are connected through sintering of glass silver paste, and a chip electrode signal is led out through the gold-plated lead column; according to the invention, the long-term stability of the sensor is significantly improved, the mechanical strength and reliability of electrical connection are enhanced, real-time and homologous sensing of temperature signals is realized, and the compensation precision of the sensor in a full temperature range is effectively improved.
Owner:XI AN JIAOTONG UNIV
Dexterous hand force tactile sensor structure, robot dexterous hand and testing method
PendingCN121973279Ahigh sensitivityhighly corrosiveGripping headsForce measurement by measuring optical property variationFiberGrating
The invention discloses a dexterous hand force tactile sensor structure, which belongs to the technical field of tactile perception of robot dexterous hands, and comprises a first force arm, a second force arm, a contact slide rail and a fiber grating sensor, distances between hinge points of the first force arm and the second force arm and same-direction ends of the first force arm and the second force arm are equal; one side of the first force arm and one side of the second force arm are slidably connected with the contact sliding rail and correspondingly connected with the two ends of the elastic element. The fiber grating sensor is connected with the other sides of the first force arm and the second force arm; according to the invention, the fiber grating is used as a core sensitive element, and the two ends of the fiber grating sensor are synchronously triggered by matching the two force arms which are arranged in a crossed manner with the contact slide rail, so that the problems of large size, poor durability, easy interference, poor precision and the like of a traditional electrical sensor in dexterous hand application are solved.
Owner:NANJING FORESTRY UNIV
A pressure sensor and a method of manufacturing the same
This disclosure provides a pressure sensor and its fabrication method, belonging to the field of microelectronic component technology, aiming to improve the temperature stability of the pressure sensor. The pressure sensor includes: a substrate; at least one pair of capacitors located within the substrate, the capacitor pair including a first type of capacitor and a second type of capacitor; wherein, each capacitor includes a cavity, and a top electrode and a bottom electrode located on opposite sides of the cavity; a first protective layer located on the side of the top electrode of the at least one pair of capacitors away from the cavity; wherein, the first protective layer includes a first portion corresponding to the first type of capacitor and a second portion corresponding to the second type of capacitor, the thickness of the first portion being greater than the thickness of the second portion; and a support layer and an inter-film gap, the support layer being located on the side of the first protective layer closer to the first type of capacitor, and the inter-film gap being located between the support layer and the first type of capacitor.
Owner:BEIJING BOE SENSOR TECH CO LTD +2
Temperature control device of optical fiber and optical communication system
ActiveCN224124437UAchieve bidirectional temperature controlImprove temperature stabilityTemperatue controlCasings/cabinets/drawers detailsTemperature controlCommunications system
The utility model relates to the technical field of optical fiber temperature control, and relates to an optical fiber temperature control device and an optical communication system. The device comprises a temperature box body, a temperature detection module, a thermoelectric refrigeration module, a control module and a heat dissipation support, wherein the control module is connected with the temperature detection module and the thermoelectric refrigeration module; an optical fiber is placed in the thermal insulation box body, and the thermal insulation box body is provided with an input port and an output port for the optical fiber to pass through; the temperature detection module is used for detecting the temperature value of the optical fiber and transmitting the temperature value to the control module; the two thermoelectric ends of the thermoelectric refrigeration module are attached to the heat preservation box body and the heat dissipation support respectively. The temperature detection module, the thermoelectric refrigeration module, the control module and the heat preservation box body are all installed in the heat dissipation support. The control module is used for comparing the temperature value with a preset value and controlling the thermoelectric refrigeration module to start refrigeration or heating according to a comparison result. Bidirectional temperature control of the optical fiber in the heat preservation box body can be achieved, the optical fiber heat preservation box can adapt to a wide environment temperature range, and the response speed is high.
Owner:O NET COMM (SHENZHEN) LTD
Electronic equipment resistor suitable for wide temperature range
ActiveCN224082271Uavoid thermal expansionprevent oxidationResistor mounting/supportingElectrical resistance and conductanceThermodynamics
The utility model relates to the technical field of resistors, in particular to an electronic equipment resistor suitable for a wide temperature range. The resistor comprises a resistor body, supporting assemblies are movably connected to the positions, close to the two ends, of the bottom of the resistor body, and protection assemblies are arranged between the outer wall of the resistor body and the two supporting assemblies. Through collaborative design of the protection assembly and the supporting assembly, the reliability problem of a traditional winding resistor in a wide-temperature and vibration environment is solved. The protection assembly adopts an alloy spiral ring to wind a resistor body, a gap is reserved to buffer thermal expansion and cold contraction, and material oxidation and resistance drift are inhibited; the spiral structure and the gap form an elastic buffer space, vibration energy is absorbed, and welding spot stress concentration is avoided. The supporting assembly is movably connected with the bottom of the body through an L-shaped honeycomb supporting plate, disperses vibration stress, adapts to size changes and is in flexible connection with the end in cooperation with fine adjustment of screws, and structural stability is guaranteed.
Owner:WUJIANG HEMEI ELECTRONIC TECH (SUZHOU) CO LTD
(In 1 / 3 Mo 2 / 3 ) 5+ Cobalt-doped niobate microwave / terahertz dielectric ceramic and preparation method thereof
PendingCN122586555Ahigh quality factorEnhanced covalency
This invention belongs to the field of electronic information materials technology, and discloses a (In 1 / 3 Mo 2 / 3 ) 5+ Cobalt niobate-doped microwave / terahertz dielectric ceramics and their preparation methods, with the general chemical formula CoNb 2‑x (In 1 / 3Mo 2 / 3 ) x O6, 0.01 ≤ x ≤ 0.03; This material has a single orthorhombic niobite structure with space group Pbcn. Its preparation method involves weighing and mixing CoO, Nb2O5, In2O3, and MoO3 raw materials through ball milling; drying the ball-milled slurry, adding a binder for granulation, sieving, and pressing into green bodies; sintering the green bodies after debinding to obtain the indium-molybdenum composite ion-doped cobalt niobate dielectric ceramic. It exhibits low dielectric loss and moderate dielectric constant in the terahertz band, filling the gap in existing research on the dielectric properties of cobalt niobate dielectric ceramics in the terahertz band. Furthermore, the material's preparation process is simple, the sintering temperature is moderate, it is compatible with existing ceramic processes, suitable for industrial production, and has broad application prospects in next-generation microwave / terahertz communication devices.
Owner:TIANJIN UNIV
Dynamic scheduling method and device for refrigeration capacity of refrigerator and refrigerator
PendingCN122083611AReal-time perception of dynamic thermal performanceRealize accurate assessmentDomestic cooling apparatusRefrigeration safety arrangementIceboxRefrigeration
This application provides a method, apparatus, and refrigerator for dynamic scheduling of refrigerator cooling capacity, relating to the field of refrigerator technology. The method includes: acquiring phase change temperature distribution information and historical operating condition information of the compressor in each compartment; determining the cooling capacity mobility in each compartment based on the average temperature and phase change temperature distribution information, and determining the phase change response delay time in each compartment based on the phase change temperature distribution information; determining the system thermal inertia coefficient in each compartment based on the cooling capacity mobility and phase change response delay time; determining the heat load rate in each compartment based on the average temperature and historical operating time of the compressor; determining the target compartment that meets preset forward-looking start-up conditions based on the system thermal inertia coefficient and heat load rate in each compartment, and determining the cooling capacity demand of the target compartment and at least one cooling supply compartment; and allocating the schedulable cooling capacity from each cooling supply compartment to the target compartment, thus solving the problem of precise matching of cooling capacity supply and demand.
Owner:ICE KRYPTON EPOCH INTELLIGENT TECHNOLOGY (NANJING) CO LTD
A prefabricated building integrating concealed heating and ventilation channels
ActiveCN224284835USimple structureRapid responseDucting arrangementsLighting and heating apparatusVentilation tubeTemperature control
This utility model discloses a prefabricated building integrating concealed heating and ventilation channels, relating to the field of building equipment technology. It includes a prefabricated building body, with an air supply component fixedly installed on the outer wall of the prefabricated building body. A sensing component is connected to the top of the air supply component, which includes a distribution box. A mixing pipe is fixedly connected to the end of the distribution box away from the air supply component. A connecting component is fixedly connected to the end of the mixing pipe. A first ventilation pipe is fixedly connected to the end of the connecting component away from the mixing pipe. A second ventilation pipe is connected to the end of the first ventilation pipe. This utility model features a structure linking the air supply component and the sensing component, enabling stable introduction and delivery of external air to the distribution box. The rotation of the air guide plate is driven by the thermal expansion and contraction effect of ether within the annular cylinder, automatically adjusting the opening state of the cold and hot air ducts according to the ambient temperature. This achieves a passive temperature control function that switches between cold and hot air without the need for an electrical control system. The structure is simple, the response is sensitive, and the energy consumption is extremely low.
Owner:ZHONGTIAN NORTHWEST CONSTR INVESTMENT GRP CO LTD
Method for improving the electrocaloric effect of barium titanate-based ferroelectric perovskite electrocaloric materials
A method for improving the electrocaloric effect of ferroelectric perovskite material, by weighing Ba source, Sr source, Ca source, Hf source, Sn source, Zr source, Ti source and mixing uniformly according to stoichiometric ratio, pre-sintering to obtain (Ba x Sr y Ca z A 1‑x‑y‑z )(Hf a Sn b Zr c Ti d B 1‑a‑b‑c‑d )O3 powder; after fine grinding and mixing with binder, granulation, shaping, aging, plastic removal treatment to obtain ceramic green body; finally, through sintering, high electrocaloric performance barium titanate-based ferroelectric perovskite electrocaloric material is obtained, the application takes barium titanate ceramic as matrix, introduces zirconium, hafnium, tin, strontium, calcium and other element precursors during synthesis by solid phase method, simultaneously substitutes BaTiO3 material at A and B positions with multi-element doping, after blending, high temperature sintering to obtain finished product. The method has simple preparation condition, mature process, low cost and high reliability. Under the induction of electric field, great entropy change and electrocaloric effect are generated.
Owner:SHANGHAI JIAOTONG UNIV
An energy-saving and environmentally friendly refrigerated truck compartment
ActiveCN224392778Uguaranteed qualityreduce pollutionAir-treating devicesBatteries circuit arrangementsCold chainClean energy
This utility model relates to the field of logistics transportation equipment technology, specifically disclosing an energy-saving and environmentally friendly refrigerated truck body, including a truck body, a refrigeration unit, and a battery. It also includes a flexible photovoltaic power generation panel laid on the top of the truck body, a phase change energy storage layer integrated into the inner wall of the truck body, and a control system. The refrigeration unit is an electric variable frequency refrigeration unit, which directly provides clean energy to the refrigeration device through a solar photovoltaic power generation system, significantly reducing carbon emissions and noise pollution from traditional fuel-fired power generation. The combination of phase change energy storage and high-efficiency insulation materials greatly improves temperature stability, ensuring that goods are kept in a constant temperature environment throughout transportation, effectively protecting the quality of perishable goods. The intelligent control system, through multi-module operation, achieves precise energy allocation and efficient equipment operation, extending equipment lifespan while reducing maintenance costs. The overall design balances practicality and environmental protection, providing a reliable, economical, and environmentally friendly technical solution for the cold chain logistics industry.
Owner:LIANYUNGANG XINJI REFRIGERATION EQUIP CO LTD
X8R type high-reliability ceramic dielectric material with double-shell design as well as preparation method and application of X8R type high-reliability ceramic dielectric material
PendingCN121974680AImprove insulation performanceImprove reliabilityFixed capacitor dielectricDopantBarium titanate
The invention discloses an X8R type high-reliability ceramic dielectric material with a double-shell design and a preparation method and application thereof, and belongs to the technical field of electronic ceramic materials. According to the ceramic dielectric material, barium titanate is used as a main body material, at least one of Y2O3 and Dy2O3 is used as a first dopant, and at least one of MgO and MnO2 is used as a second dopant. The preparation method comprises the following steps: pre-sintering BaTiO3 and a first doping agent at a high temperature; and then adding a second doping agent for secondary mixing and high-temperature sintering. According to the method, a double-shell structure of a tetragonal phase crystal nucleus, a rare earth-rich inner shell layer and an Mg / Mn-rich outer shell layer is constructed in ceramic crystal grains. The high dielectric property of the BaTiO3 crystal nucleus is reserved, the rare earth-rich inner shell layer is used for inhibiting oxygen vacancy long-range migration, the Mg / Mn-rich outer shell layer is used for optimizing temperature stability, synergistic improvement of the high dielectric constant (epsilon r gt, 2200), X8R wide-temperature stability (delta C / C 25 DEG C is smaller than or equal to + / -15%, minus 55-150 DEG C) and high breakdown field strength (larger than or equal to 6.7 kV / mm) is achieved, and the high-dielectric-temperature-stability high-voltage-resistant MLCC is suitable for manufacturing the high-dielectric-temperature-stability high-voltage-resistant MLCC.
Owner:SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
A rapid temperature change test chamber
ActiveCN116493056BImprove test accuracyImprove ambient temperature stabilityHeating or cooling apparatusClimate change adaptationTest chamberMechanical engineering
Owner:BEIJING AOFENGMING METAL PROD CO LTD
A double-layer microwave dielectric ceramic material and a preparation method thereof
This invention relates to the field of ceramic materials technology, specifically to a double-layer microwave dielectric ceramic material and its preparation method. The invention controls the shrinkage rate by increasing the pre-firing temperature, controlling the component lamination pressure, and controlling the sintering process, thus preparing a microwave dielectric ceramic material with a smooth surface and dense interior. This material not only retains the advantageous properties of each single-layer material, such as high dielectric constant and good temperature stability, but also achieves complementary and enhanced performance through the design of the lamination structure. This material not only possesses advantages such as high dielectric constant and high thermal stability, but also features a simple preparation process and low cost, thereby solving the problem of complex manufacturing processes and high production costs of existing double-layer microwave dielectric ceramic materials.
Owner:GUILIN UNIV OF ELECTRONIC TECH +2
In-cabin all-round confocal lens, camera device with in-cabin all-round confocal lens and driving tool with in-cabin all-round confocal lens
PendingCN121934252Areduce driftImprove temperature stabilityOptical elementsOphthalmologyRelative luminance
The invention discloses an in-cabin looking-around confocal lens and a camera device and a driving tool with the same, the lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from an object side to an image side, and the following conditions are met: 13.14 lt; fOV / Ym / 2lt; 24.36, FOV is the angle of view of the lens, and Ym is the image height of the lens corresponding to the FOV. According to the invention, large-view-field coverage is realized, and the consistency of visible light and infrared imaging is considered at the same time; it is ensured that the lens can shoot high-definition pictures at the high temperature of + 125 DEG C and the low temperature of-40 DEG C; the imaging resolution is high, the MTF level is kept excellent in a full-view-field range, and center and edge imaging is balanced; the aberration correction capability is outstanding, the chromatic aberration control is excellent, the chromatic aberration is stably controlled within 2pixel, and the purple edge inhibition effect is remarkable; and when the field angle is 80 degrees, the relative illumination is higher than 50%, and the image brightness distribution is uniform.
Owner:SIRTEC INT SUZHOU
Valve for dosing a fluid, in particular fuel injection valve
ActiveCN112983706BImprove temperature stabilityGood for scalabilityMachines/enginesSpecial fuel injection apparatusCombustion chamberMetallic materials
The invention proposes a valve, in particular a fuel injection valve, which is characterized in that it has improved temperature stability in the region of the valve components which are subjected to high temperatures. The fuel injection valve (1) comprises an actuator (15) which can be excited for actuating a valve closure body (12) which forms a sealing seat together with a valve seat face (14) formed on a valve seat body (13), and an injection opening (4) which is formed downstream of the valve seat face (14). Furthermore, the valve has a valve seat carrier (10) which receives the valve seat body (13), forms part of a valve housing (22) and is connected to the valve seat body (13). The valve seat carrier (10), which is composed of a metallic material, and the valve seat body (13), which is composed of a ceramic material, are fixedly connected to one another indirectly via a clamping sleeve (30). The fuel injection valve is particularly suitable for direct injection of fuel into the combustion chamber of a mixed compression, externally ignited internal combustion engine.
Owner:ROBERT BOSCH GMBH
Paper drying device
ActiveCN224186512Uavoid embrittlementSolve the problem of reduced processing efficiencyDryer sectionTemperature controlMechanics
The utility model relates to the technical field of paper drying equipment, in particular to a paper drying device. Comprising a machine box and an air supply pipe, four temperature control areas are sequentially arranged in the machine box, the temperature control areas are arranged at intervals and form a backflow channel for airflow to pass through, surrounding walls are arranged outside the four temperature control areas, backflow layers are formed between the surrounding walls and the temperature control areas and communicated with the backflow channel, and the air supply pipe is communicated with the air supply pipe. Conveying rollers are symmetrically arranged on the two sides of the middle of the temperature control area, and air supply pipes are symmetrically arranged on the upper portion and the lower portion in the temperature control area respectively; the inside of the case is divided into a plurality of temperature areas, and a drying mode that the temperature rises step by step is adopted, so that the paper quality is improved, and the production efficiency is ensured.
Owner:HEBEI XIN WANG REFINED COTTON IND CO LTD
Sunken direct current metering module based on TMR sensing technology
ActiveCN224203287Uhigh sensitivitySimple structureCurrent/voltage measurementElectrical measurement instrument detailsInterference resistanceInterference (communication)
The utility model is suitable for the technical field of current sensing and metering, and relates to a sinking type direct current metering module based on a TMR sensing technology, which comprises an MCU management unit, a measuring chip unit, a current sampling circuit, a voltage sampling circuit, an addressing sampling circuit, a pulse output module and a communication interaction module. The MCU management unit is respectively connected with the measuring chip unit, the pulse output module, the communication interaction module and the addressing sampling circuit, the current sampling circuit and the voltage sampling circuit are respectively connected with the measuring chip unit, and the current sampling circuit is also connected with the TMR sensor. The direct-current metering module is simple in structure and convenient to work, and the metering precision and the anti-interference capability of the direct-current metering module are effectively improved.
Owner:WILLFAR INFORMATION TECH CO LTD
Anode control method, device and vehicle for fuel cell engine
ActiveCN119252991BLess water productionprevent floodingPropulsion by batteries/cellsFuel cellsFuel cellsDistributor
The application relates to the technical field of fuel cell engine control, in particular to an anode control method and device of a fuel cell engine and a vehicle, wherein the method comprises the following steps: collecting an actual temperature of an environment currently where the fuel cell engine is located; in the case that the actual temperature is greater than or equal to a first preset temperature threshold and less than or equal to a second preset temperature threshold, acquiring a current power of the fuel cell engine; and generating a first hydrogen discharge action of exhaust anode waste gas according to the current power of the engine and / or a target humidity of a stack and a current humidity. Therefore, the problem that, in the prior art, a water distributor cannot be adjusted according to different working conditions and it is difficult to meet the humidity requirement of a stack membrane under different working conditions, thereby affecting the performance and service life of a fuel cell, is solved.
Owner:CHINA FAW CO LTD
An energy-saving defrosting control method, system, device and storage medium
The present application relates to defrosting control technical field, especially a kind of energy-saving defrosting control method, system, equipment and storage medium, wherein method includes: the operation data of refrigerator is collected, and after the operation data is smoothed and normalized, normalized operation data is generated, and the normalized operation data is weighted combination to build basic operation characteristics;Controller reads continuous feature points from the basic operation characteristics according to rolling time window, and combines reference trend intensity, and converts the continuous feature points into equivalent heat exchange degradation amount;Controller reads multiple equivalent heat exchange degradation amounts according to rolling window, and adopts exponential weighted average to calculate weighted degradation representative value, and controller calculates defrosting net energy-saving based on the weighted degradation representative value, compares the defrosting net energy-saving with preset starting margin, generates defrosting energy-saving judgment result;Controller converts the defrosting energy-saving judgment result into defrosting control action.
Owner:GUANGZHOU BAIYOU ELECTRIC CO LTD
Triarylamine compound containing benzimidazole structure and organic electroluminescent device
PendingCN121974858AImprove mobilityImprove temperature stabilityOrganic chemistryOrganic electroluminescencePolymer chemistry
The invention provides a triarylamine compound containing a benzimidazole structure and an organic electroluminescent device, and relates to the technical field of organic photoelectric materials. When the triarylamine compound is applied to the organic electroluminescent device as a main body material, the driving voltage of the organic electroluminescent device can be reduced, the luminous efficiency and brightness of the organic electroluminescent device can be improved, and the service life of the organic electroluminescent device can be prolonged.
Owner:FUYANG SINEVA MATERIAL TECHNOLOGY CO LTD
A power supply multi-point thermal management method and device, computer equipment and storage medium
ActiveCN121282442BSolving temperature consistency issuesImprove dynamic response performanceSecondary cellsLoop controlMode control
The application relates to a power supply multi-point thermal management method and device, computer equipment and a storage medium, wherein the power supply multi-point thermal management method is based on distributed sensing and hierarchical control, temperature collection is realized through a temperature sensing array; temperature-power dual-mode control is adopted, when single-board adaptive cooling is executed, control quantity is generated through a segmented PWM algorithm based on temperature data, through a mode adaptive mechanism, energy efficiency optimization is realized based on a temperature reference in a small current mode; at a regional coordination level, average value calculation or fixed speed control strategy setting is selected through FRM parameter configuration, the operation state of the cell board fan is converted into a control instruction of a regional large fan, and a "small fan guiding large wind direction" cooperative heat dissipation effect is formed. Through the closed-loop control architecture, 18 cell boards can maintain a stable working temperature of 30-40 DEG C in an environment temperature of 15 DEG C to 35 DEG C, the problem of cell board overheating is effectively solved, the system reliability is improved, and the energy consumption is reduced.
Owner:SHENZHEN INTELLIWORK TECH CO LTD
Closed-loop fluxgate current detection system
PendingCN121878287Asimple designImprove output linearityCurrent measurements onlyVoltage/current isolationIntegratorClosed loop
The invention relates to the technical field of magnetic variable measurement, and discloses a closed-loop fluxgate current detection system, which is characterized in that a self-excited oscillation unit is connected with a PAC conversion unit, the PAC conversion unit is connected with an integration unit, the duty ratio of a square wave signal is converted into a voltage deviation signal, and the voltage deviation signal is provided for the integration unit; the integration unit is connected with the feedback compensation unit and is used for integrating the voltage deviation signal and providing an integration voltage; the self-excited oscillation unit adopts a symmetrical driving structure comprising an analog switch, and provides a square wave signal representing a duty ratio for the PAC conversion unit; and the feedback compensation unit is connected with the compensation winding, outputs a voltage signal in proportion to the current to be detected and drives the compensation winding to generate a counteracting magnetic field so as to form closed-loop detection. The problems of low bandwidth, zero drift, structure limitation and high cost in the prior art are solved, and the purposes of high bandwidth, openable installation, low ripple output, high precision and extremely high symmetry and consistency are achieved.
Owner:SUPCON TECH CO LTD
Square insulated wire multi-filar wound coil
ActiveCN224400161Uincrease contact areaFast heat conductionTransformers/inductances coolingTransformers/inductances casingsMechanical engineeringElectrical and Electronics engineering
The utility model relates to the technical fields of insulation wire coil, disclose square insulation wire multicoil coil, including coil main part and cover wire film, coil main part includes a plurality of insulation wire, each insulation wire is in parallel winding arrangement, insulation wire is formed by multistrand wire and is parallel wound, cover wire film is wrapped coil main part, coil main part is square shape arrangement, coil main part is wound and forms coil piece, and coil piece has a plurality of outer circle surface, and each outer circle surface is flush and is arranged correspondingly. Since coil main part is square shape arrangement, the contact area between each insulation wire is increased, and the contact area between cover wire film and each insulation wire is also increased, the heat conduction between coil main part is greatly enhanced, and the heat conduction between coil main part and cover wire film is improved, the high temperature resistance of coil piece is improved, the coil piece can work stably under high temperature environment, and the temperature stability and service life of coil piece are improved.
Owner:HUIZHOU HUAYING ELECTRONIC TECH CO LTD
Lead-free high-voltage pulse-resistant energy storage multilayer ceramic capacitor and preparation method thereof
ActiveCN121812372Aincrease temperatureReduce the temperatureFixed capacitor electrodesFixed capacitor dielectricVoltage pulseCeramic capacitor
The invention relates to the technical field of ceramic capacitors, in particular to a lead-free high-voltage pulse-resistant energy storage multilayer ceramic capacitor and a preparation method thereof. The method comprises the steps that ceramic powder, a solvent, a dispersing agent, a plasticizer and a silicon-based defoaming agent are subjected to ball milling to obtain slurry, and the lead-free high-voltage-pulse-resistant energy storage multilayer ceramic capacitor is obtained through the processes of tape casting, screen printing, lamination, lamination, cutting, glue discharging, sintering, chamfering, end sealing, end burning and electroplating in sequence. The thickness of the film is 25-40 [mu] m; 70 Ag-30 Pd, 60 Ag-40 Pd or 90 Ag-10 Pd electrode slurry is used as an inner electrode material, and drying is carried out at the temperature of 65-75 DEG C after printing; the soft pressing temperature is 60-80 DEG C, the soft pressing pressure is 12-15 MPa, and the pressure holding time is 15-18 s; the lamination pressure is 40 MPa to 55 MPa, and the pressure maintaining time is 10 min to 30 min; the glue discharging temperature is 265-325 DEG C, and the temperature is kept for 7-11 hours; the sintering temperature is 1050-1200 DEG C, and the sintering time is 2-4 hours; in the electroplating process, the nickel plating current ranges from 19 A to 21 A, and the time ranges from 90 min to 120 min; the tin plating current is 13A-15A, and the time is 90 minutes to 120 minutes.
Owner:GUANGZHOU CHUANGTIAN ELECTRONIC TECH CO LTD