63results about How to "Improve temperature performance" patented technology

A pipe having: a layer of fluoropolymer; an intermediate layer of ethylene and vinyl alcohol copolymer; and an outer layer of polyphthalamide. An electricity production assembly is provided using a fuel cell and including such a pipe.

The invention relates to the technical field of a transmit-receive frequency conversion channel, and discloses a millimeter wave 16-channel transmit-receive frequency conversion channel assembly, which mainly adopts a mixed design of an MMIC bare chip and an LTCC circuit and realizes a microminiature design through one or more frequency conversion. The transmit-receive frequency conversion channel assembly is in a three-layer structure on the whole, wherein the upper layer comprises a power control portion, the middle layer is a frequency conversion circuit portion and the lower layer comprises 16 paths of waveguide interfaces. The frequency conversion circuit portion comprises 16 paths of receiving channels, one path of emission channel and a local oscillator processing circuit. The receiving channels and the emission channel share the 16 paths of waveguide interfaces; transmit-receive time-sharing power supply is realized; channel switching is carried out through a radio frequency switch; power supply and control signals between the layers are connected through a miniature low-frequency connector; radio frequency signals are connected through a radio frequency isolator; and the layers are internally connected through via holes. Therefore, the millimeter wave 16-channel transmit-receive frequency conversion channel assembly realizes high-density integration of millimeter wave multi-channel transmit-receive frequency conversion channels, is small in size, light in weight and high in environment adaption capability, improves working stability and reliability of the system in various environment conditions, and meets the future trend of transmit-receive frequency conversion channel miniaturization.

The present invention discloses a MTJ triaxial magnetic field sensor, comprising an X-axis bridge sensor that has a sensing direction along an X-axis, a Y-axis bridge sensor that has a sensing direction along a Y-axis, a Z-axis sensor that has a sensing direction along a Z-axis, and an ASIC chip connected with and matched to the X-axis, Y-axis, and Z-axis sensor chips. The Z-axis sensor includes a substrate and MTJ magnetoresistive elements deposited on the substrate. The Z axis magnetic field sensor is attached to the ASIC chip along an attachment edge, and an angle is formed between the sensor side of the Z axis magnetic field sensor and the adjacent attachment edge. The attachment edge angle is an acute angle or an obtuse angle. The resulting X, Y, and Z axes are mutually orthogonal. The above design provides a highly integrated sensor with high sensitivity, low power consumption, good linearity, wide dynamic range, excellent thermal stability, and low noise.

Lighting systems that provide improvements in various aspects are contemplated. In one aspect, light fixtures can comprise at least one of an occupancy sensor, a constant current module, an external power supply, a plurality of lighting elements mounted on a heat sink, a sealing mechanism, and top and bottom housings having tabs to removably couple with one another. In another aspect, a disconnect comprising a plug and socket housing is contemplated.

The invention discloses a method for preparing a magnetic powder core with high-flux magnet ring performance. The method comprises the following steps of alloy smelting, gas atomization crushing, annealing, insulation coating, compression molding, heat treatment, reinforcing and surface paint spraying. The magnetic powder core prepared by the method has high-saturation magnetic induction intensity, high alternating current/direct current superposition property and good temperature stability, is low in iron core loss and cost, meets the requirements of high frequency, high power, miniaturization and electromagnetic interference resistance of electron devices, and is greatly noticed by the electron industry, and the market application scope is enlarged continuously.

The invention discloses a preparation method of an aluminum nitride raw ceramic sheet for high temperature co-fired ceramic. The preparation method comprises the following steps: 1) loading a grindingball; 2) disposing slurry; 3) performing primary grinding; 4) configuring casting slurry; 5) performing secondary grinding; 6) performing vacuum defoaming; 7) casting, wherein the casting slurry subjected to vacuum defoaming is transferred to a casting machine for casting operation, and the thickness of a green tape is controlled within a range of 0.05 to 1 mm; and 8) cutting. The raw material does not contain toxic components such as benzene, ketone and aldehyde, and organic toxic and harmful substances and waste liquid are not generated in the production process, thereby reducing environmental pollution. The raw ceramic sheet produced by the method has high strength, good thermal conductivity and uniform density, and is less prone to deformation, high in punching printing precision andgood in flatness and has good shrinkage matching with metallized slurry in the production process of high temperature co-fired ceramics. The film coating operation is not needed in the production process, the problems of softness, difficult processing, high probability of offset filling printing and lamination misalignment and the like are solved, and the production efficiency is improved while the production cost is lowered.

The invention provides a BGO (Bismuth Germanium Oxide) crystal electro-optic coefficient temperature relevancy self-compensation device and method. The BGO crystal electro-optic coefficient temperature relevancy self-compensation device comprises a faraday collimation optical rotation device, a quartz tube, an antireflection film, a reflective film, a BGO crystal and a base; the faraday collimation optical rotation device comprises a collimating lens and a faraday optical rotation device; the collimating lens and the faraday optical rotation device are packaged inside the quartz tube; an antireflection film and a reflective film plate two ends of the BGO crystal; the quartz tube and the BGO crystal are installed on the base. According to the BGO crystal electro-optic coefficient temperature relevancy self-compensation device and method, faraday optical rotation device optical rotation angle temperature characteristics and influences thereof to an optical voltage transformer transformation ratio are utilized to automatically compensate BGO crystal electro-optic coefficient measuring error caused by temperature variation on line.

An isolator system for a pressure transmitter includes a port internal to the transmitter, a sensor tube, and a fill tube. The sensor tube is connected to the port to fluidly connect a passageway through a transmitter body to a pressure sensor. The sensor tube includes a first end disposed in the port. The first end has a first cross-sectional area. The fill tube is internal to the transmitter and connected to the port to fluidly connect to the passageway. The fill tube includes a second end disposed in the port. The second end of the fill tube has a second cross-sectional area that is less than the first cross-sectional area of the sensor tube.

The invention discloses a multi-channel detection system for real-time nucleic acid fluorescence detection. The multi-channel detection system comprises a temperature control module, a hot cover, a filter wheel, a Y-shaped fluorescence detection optical fiber, a motion scanning module and a photoelectric detection module, wherein an exciting light LED emits exciting light, the exciting light is collimated by a collimating lens, the exciting light is filtered to form light waves with specific wavelengths by a exciting light filter, and the light waves pass through the Y-shaped fluorescence detection optical fiber, are focused by the lens and irradiate a sample in a test tube to excite a fluorescence signal, the fluorescence signal is focused on the Y-shaped fluorescence detection optical fiber through the lens, an invalid signal is filtered out through the emitted light filter, and a fluorescence signal is converted into an electric signal through a collimating lens focusing and photoelectric detection module. The system is advantaged in that a motor drives a filter wheel to rotate by a specific angle so as to switch a filter assembly with a specific wavelength to realize a multi-band detection function; the Y-shaped fluorescence detection optical fiber is driven by a motion scanning module to move so as to realize detection of multiple test tube hole sites.

The invention relates to a system for spraying water into the combustion air drawn into the intake of vehicle and industrial internal combustion engines. The inventive system consists of a preferably-distilled water supply circuit including at least one water container which is provided with a supply mouth and a control cover which is mounted on a frame support. According to the invention, functionally-interconnected elements, which are automatically and externally controlled by an electronic board, are provided on the base of the above-mentioned container, submerged in the fluid therein. The aforementioned elements consist of a filter which is associated with an electromagnetic metering pump by means of connectors and a water delivery conduit section, said pump drawing in and driving a flow of water. One side of the pump is connected to a water flow control valve and the respective manually-controlled calibrated return element thereof by means of connectors and conduit sections. Connectors and conduit sections are used to connect said control valve to a safety valve for interrupting the flow of water and the water path then extends through a conduit section to an outlet connector through which water is released from the container. Outside of the container, the water then passes through a conduit section housing a one-way valve until it reaches a support flange of a sprayer with a drain valve, which is disposed inside the tube used to draw in the stream of combustion air.

The invention discloses reactive high-viscosity liquid asphalt and a preparation method and application thereof. The reactive high-viscosity liquid asphalt contains, in parts by weight, 50-60 parts ofasphalt, 25-35 parts of an organic solvent and 15-25 parts of a modifier. A reactive high-viscosity liquid asphalt mixture which is obtained through mixing of the reactive high-viscosity liquid asphalt, an inorganic active powder curing agent and graded aggregate has the advantages of low cost, high strength, rapid strength development, convenient construction and a wide application range, can beused as a super-thin abrasion layer which is laid on an original pavement, and can also be applied to newly-built drainage pavements.

The invention relates to a manufacturing method of an elliptical core polarization maintaining optical fiber, which comprises the following steps of: 1, selecting a base tube suitable for a core rod,and carrying out pretreatment; 2, manufacturing a core rod, wherein the core rod comprises an inner cladding and a core layer; 3, after deposition of the core layer of the core rod is finished, directional etching is conducted on one side of the inner wall of the core layer, and etching a crescent shape; then etching crescent shapes with the same radian on the opposite sides, and finally, etchingthe hollow circle in the base tube into an oval shape from an initial circle; step 4, after core rod deposition and etching are finished, performing forward and reverse collapse on the base tube, andmanufacturing a solid elliptical core optical rod; step 5, placing the core rod in the deposited quartz sleeve to form an elliptical core polarization-maintaining optical rod through combination; and6, drawing the optical rod into a small-diameter bare optical fiber, and coating the outer surface of the bare optical fiber with an optical fiber coating to obtain the final elliptical core polarization maintaining optical fiber. Through directional etching and one-time forming, the process procedures are reduced, and the stability and the reliability are improved.

The invention relates to an electromagnetic induction gyroscope, comprising a coil, a magnetic guide shaft, a magnetic detection panel; wherein, the coil winds on the magnetic guide shaft; the magnetic guide shaft is connected with the magnetic detection panel; when the gyroscope moves in a geomagnetic field or other external magnetic fields, magnetic flux of the coil changes, so that induced electromotive force is generated at the two ends of the coil. The induced electromotive force and the coil axial directon in the gyroscope are related to the included angle and the rotation speed of the field direction. The gyroscope based on electromagnetic induction is a passive whirly monitoring sensor, the gyroscope has the characteristics of simple and stable structure, small volume, good impact resistance capacity, stable temperature property and convenient application, thus being widely applied to the angular velocity measurement and magnetic density measurement of whirling objects.

The invention provides a road net-shaped crack sticker, which comprises a net-shaped crack sticker body, wherein the net-shaped crack sticker body comprises an adhesive layer, a rock layer adhered to the outer side face of the adhesive layer and an anti-sticking isolation layer adhered to the outer side face of the adhesive layer, a tire base cloth layer is arranged in the middle of the adhesive layer, the arranged tire base cloth layer can improve the tensile property of the road net-shaped crack sticker and preventwater from permeating into cracks so as to prevent the adhesive layer from falling off, and the net-shaped crack sticker body serving as a surface layer of a repairing structure can be well bonded with an original road surface and well adapt to crack changes.

The invention relates to a single-wavelength optical transmitting-receiving integrated module comprising a tube housing, and a refrigeration device and a metal optical fiber assembly which are disposed in the tube housing. The optical fiber front end of the metal optical fiber assembly extends out of the tube housing through an opening on the tube housing. The optical fiber rear end of the metal optical fiber assembly is fixed to the refrigerating device. The refrigerating device is provided with a light emitting device, a light absorbing device and a photodiode detecting circuit. The light emitted by the light emitting device is injected into the rear end of the metal optical fiber assembly through a collimating lens group and is simultaneously reflected to the light absorbing device. The photodiode detecting circuit is used for subjecting the light absorbed by the light absorbing device to photoelectric conversion and outputting an electric signal. The single-wavelength optical transmitting-receiving integrated module uses a semiconductor cooler structure, enables a fiber sensing optical transmitting-receiving optical path to operate at constant temperature, and is improved in temperature performance. The focusing of the optical path is achieved by the collimating lens group so that light source energy is transmitted and received at a maximum to achieve an efficient transmitting-receiving function.

The invention provides an optical lens. The optical lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an imageside. The first lens has negative focal power and a meniscus shape, the object side surface is a convex surface, and the image side surface is a concave surface; the second lens has negative focal power and a meniscus shape, the object side surface is a convex surface, and the image side surface is a concave surface; the third lens and the second lens are bonding lenses, the third lens has positive focal power and a meniscus shape, the object side surface is a convex surface, and the image side surface is a concave surface; the fourth lens has positive focal power and a biconvex shape, the object side surface is a convex surface, and the image side surface is a convex surface; the fifth lens has positive focal power and a biconvex shape, the object side surface is a convex surface, and theimage side surface is a convex surface; and the sixth lens has negative focal power and a meniscus shape, the object side surface is a concave surface, and the image side surface is a convex surface.According to the optical lens provided by the invention, the shapes of the lenses are optimally set, and the focal power of the lenses is reasonably distributed, so that the high-resolution, low-aberration, low-cost and relatively good temperature performance can be realized while the miniaturization of the lens is kept.

The invention discloses a heat pump temperature control system based on a particle swarm fuzzy PID algorithm. Preprocessed experimental data is subjected to a least square method and an auxiliary variable method to establish a mathematical model of an air source heat pump temperature control system. Due to the fact that a heat pump temperature control system has the characteristics of time varying, nonlinearity and pure lag, on the basis of fuzzy PID control, MATLAB is adopted to design a two-dimensional self-adaptive fuzzy PID controller based on the particle swarm optimization. By optimizing all parameters of the system, the water flow of the system can be well controlled, and the temperature control effect of the heat pump system is optimized and improved. And finally, stability verification is carried out, that is, after the system is stable, an interference signal is added to the system, and the system is interfered. The stable effect of the system is observed. A simulation result shows that the fuzzy PID algorithm based on the particle swarm optimization (PSO) has the advantages of very short control time, fast response and very strong anti-interference capability.

The invention relates to a method for preparing core-shell reversible heat-sensitive temperature indicating composite microspheres. The method is characterized by comprising the following steps of: adding MCM-41 silicon-based mesoporous microspheres into a CoCl2 aqueous solution to prepare reversible heat-sensitive temperature indicating microspheres, and adding an emulsifier Span80 into cyclohexane to prepare an oil phase; adding the reversible heat-sensitive temperature indicating microspheres into the oil phase to prepare S/O1 emulsion; adding an emulsifier Tween80 into a polyvinyl alcohol aqueous solution to prepare a water phase; dripping the S/O1 emulsion into the water phase to prepare S/O1/W inner emulsion; adding the emulsifier Span80 into the cyclohexane to prepare a dispersed phase, and dripping the S/O1/W inner emulsion and a cross-linking agent glutaraldehyde into the dispersed phase to prepare S/O1/W/O2 composite emulsion; and reacting the composite emulsion with stirring, performing suction filtering, washing, and drying to obtain the core-shell reversible heat-sensitive temperature indicating composite microspheres. The microspheres sensitively indicate temperature and are high in reversibility, environmental adaptability and reusability.