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40results about How to "Improve sensing characteristics" patented technology
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Pressure detection device
ActiveUS20060090566A1Improve sensing characteristicsSuppress mutationFluid pressure measurement using elastically-deformable gaugesFluid pressure measurement by electric/magnetic elementsPressure transmissionEngineering
A pressure detection device includes a sensing part that outputs an electrical signal responsive to an applied pressure, a pressure receiving diaphragm that receives a pressure from a subject device, a cylindrical stem having a first end connected to the sensing part and a second end connected to the pressure receiving diaphragm, and a pressure transmission member located within the cylindrical member to transmit the pressure received by the pressure receiving diaphragm to the sensing part. In the pressure detection device, a side wall portion of the cylindrical stem has a spring portion which is provided to generate an elastic force in an axial direction of the cylindrical member. Accordingly, fluctuations in a spring characteristic acting on a pressure transmission mechanism of the pressure detection device can be effectively restricted by the spring portion.
Owner:DENSO CORP
Pressure detection device
ActiveUS7302855B2Improve sensing characteristicsSuppress mutationFluid pressure measurement using elastically-deformable gaugesFluid pressure measurement by electric/magnetic elementsPressure transmissionEngineering
A pressure detection device includes a sensing part that outputs an electrical signal responsive to an applied pressure, a pressure receiving diaphragm that receives a pressure from a subject device, a cylindrical stem having a first end connected to the sensing part and a second end connected to the pressure receiving diaphragm, and a pressure transmission member located within the cylindrical member to transmit the pressure received by the pressure receiving diaphragm to the sensing part. In the pressure detection device, a side wall portion of the cylindrical stem has a spring portion which is provided to generate an elastic force in an axial direction of the cylindrical member. Accordingly, fluctuations in a spring characteristic acting on a pressure transmission mechanism of the pressure detection device can be effectively restricted by the spring portion.
Owner:DENSO CORP
Cascade long-period pohotonic crystal fiber grating temperature sensor
InactiveCN102980685AHigh measurement accuracyHigh measurement sensitivityCladded optical fibreThermometers using physical/chemical changesGratingThermal aware
The invention relates to a cascade long-period pohotonic crystal fiber grating temperature sensor. A photonic crystal fiber is provided with a cladding consisting of periodically arrayed air holes; the cladding and a fiber core of the fiber are made of SiO2; a long-period grating with a certain period is written onto the fiber; the air holes of the cladding are filled with thermosensitive substances sensitive to temperature; the refractive indexes of the thermosensitive substances are less than the refractive index of the fiber core; and the total internal reflection photonic crystal fiber is formed. The effective refractive index of a coupled mode of the grating can be changed by controlling the temperatures of the thermosensitive substances, so that the resonant wavelength of a transmission spectrum of the grating is changed, the temperature variation is shown as spectral shift, and the wavelength-tunable temperature sensor is realized. As the bandwidth of the transmission spectrum of the single long-period grating is greater, the temperature sensitivity and the measurement precision of the transmission spectrum of the long-period grating are limited, and the sensor is transformed into a cascade long-period grating structure. The sensor achieves the tunable wavelength, the sensitivity is improved, and the sensor has a very large application prospect in the transduction field.
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY
Multifunctional sensor with microstructure fiber surface plasma resonance and preparation method thereof
ActiveCN109358038AReduce volumeReasonable workmanshipAnalysis by thermal excitationRefractive indexGold film
The invention relates to a fiber sensor, particularly relates to a multifunctional sensor with microstructure fiber surface plasma resonance and a preparation method thereof. The two sides of the photonic crystal fiber substrate of the fiber are provided with fan-shaped openings that surface of which are plated with gold films. Tips of the bottom ends of the fan-shaped openings are provided with silver nanowires. The core of the photonic crystal fiber substrate is provided with a magnetic fluid, and the outer side of the core is provided with a cladding air hole. The preparation method comprises the steps of: polishing the fan-shaped openings on the photonic crystal fiber; filling the silver nanowires; uniformly plating the gold films on the surface of the fan-shaped openings; pressing themagnetic fluid into the photonic crystal fiber from a small tube; and coupling and splicing the two ends of the common single mode fiber and the photonic crystal fiber through the self-calibrating function of the a fiber fusion splicer. The sensor of the invention can achieve the analysis and detection of the external magnetic field intensity, the refractive index of the to-be-measured liquid andthe external temperature in one time, therefore, the technical defects that the conventional detection technology is complex in operation, low in detection sensitivity and non-real time online detection are overcome.
Owner:南通畅衡智能装备有限公司
Suspended nanowire sensor and method for fabricating the same
InactiveUS7872324B2Improve sensing characteristicsMinimize interactionWave amplification devicesResistance/reactance/impedenceNanowirePhysical separation
Provided is a suspended nanowire sensor having good sensing characteristics and suitable for mass production, a method for fabricating the suspended nanowire sensor. The suspended nanowire sensor includes: first and second sensor electrodes formed on upper portions of a substrate and physically separated from each other; and a nanowire sensor material piece extending from the first sensor electrode to the second sensor electrode and physically suspended between the first and second sensor electrodes.
Owner:ELECTRONICS & TELECOMM RES INST
Ultrathin film and preparation method of organic field-effect transistor sensor based on ultrathin film
ActiveCN107192755ADifferent thicknessEasy to operateMaterial analysis by electric/magnetic meansOrganic solventOrganic field-effect transistor
The invention discloses an ultrathin film and a preparation method of an organic field-effect transistor sensor based on the ultrathin film. The preparation method is characterized by comprising the following steps: blending a polymer semiconductor material and a polymer insulating material in an organic solvent, and performing spin-coating to form a double-layer film; dissolving to remove the polymer insulating material film by adopting a good solvent, and obtaining the ultrathin film of the polymer semiconductor material; evaporating an electrode on the film, thereby obtaining the organic field-effect transistor sensor. The ultrathin film disclosed by the invention has the advantages of simple operation, high repeatability, low requirements on equipment and process conditions, no need of large precise instruments and equipment and the like; because the active layer has ultrathin thickness, the obtained sensor in the invention has the advantages of high sensitivity, high selectivity, low detection limit and the like, and has an important application prospect in the aspect of improving the sensing property of a gas sensor.
Owner:HEFEI UNIV OF TECH
Voltage regulatable anisotropic magnetoresistive sensor and manufacturing method thereof
InactiveCN109545956AImprove sensing characteristicsSimple structureMagnetic-field-controlled resistorsGalvano-magnetic device detailsPhysicsHeavy metals
The invention provides a voltage regulatable anisotropic magnetoresistive sensor and a manufacturing method thereof, and belong to the technical field of spinning electron sensors. A magnetoresistivesensor includes a substrate, and a multilayer film and a nonmagnetic heavy metal film formed on [nonmagnetic metal oxide film / magnetic regulation layer / magnetic response layer]n on the substrate in sequence, wherein n>=1. The voltage regulatable anisotropic magnetoresistive sensor has characteristics of simultaneous regulation of magnetic field detection range and magnetoresistance change rate while achieving good sensing characteristics, and can be widely applied to fields of rotational speed control, angle control, magnetic field detection, and magnetic switches and other intelligent controlfields.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA
Microstructure optical fiber
PendingCN108088798AHigh Sensitivity Sensing CharacteristicsImprove sensing characteristicsPhase-affecting property measurementsFiberGold film
The invention discloses a microstructure optical fiber. The microstructure optical fiber is mainly prepared from a fiber core, a background material, a cladding layer air hole and a nano-gold film, wherein the background material is attached on the fiber core; the optical fiber is of a spherical crown shaped structure; the optical fiber with the spherical crown shaped structure is obtained by uniformly arraying inner and outer layers of air holes to form a cylindrical optical fiber with a regular hexagonal lattice structure and polishing a side face of the cylindrical optical fiber, wherein two holes in the air holes of the outer layer are located at a plane section of the spherical crown shaped optical fiber and form two semicircular groove body openings; a fluid channel is formed by thesemicircular groove body openings; the nano-gold film is deposited on the plane section of the spherical crown shaped optical fiber located between the two semicircular groove body openings; the two semicircular groove body opening, the air holes of the inner layer and the gold film are used for surrounding a fiber core region. The microstructure optical fiber disclosed by the invention has the advantages of simple structure, high sensing flexibility and the like.
Owner:YANSHAN UNIV
Sensing device based on tilted fiber grating surface plasmon resonance and parameter optimization method thereof
ActiveCN107860750ATake advantage ofSensitive environmental response characteristicsMaterial analysis by optical meansLong-period fiber gratingGrating
The invention provides a refractive index sensing device based on tilted fiber grating surface plasmon resonance. The device consists of a broadband light source, a polarizer, a polarization controller, an optical isolator, a sensing probe formed by excessively tilted long period fiber grating and a metal film, and a spectrum analyzer. The broadband light source produces broadband incident light,after the incident light passes through the polarizer, the polarization controller and the optical isolator, single polarized light is output and is introduced into the parameter optimized sensing probe, the polarized light is coupled to a low order or high order polarization cladding mode in the sensing probe and produces a corresponding resonance peak at the output end. Specifically, the s polarized light is only coupled to an s polarization low order or high order cladding mode, the p polarized light is coupled to a low order or high order p polarization cladding mode and excites plasma resonance wave in the metal film. The spectrum analyzer records the variation situation of the output spectrum's resonant wavelength along with the refractive index of a to-be-tested sample, thus realizing detection of the to-be-tested sample. The sensing device provided by the invention effectively enhances the degree of interaction between the to-be-tested sample and the surface plasma resonance wave, and improves the sensing sensitivity and resolution.
Owner:WENZHOU UNIVERSITY
Carbon fiber packaged optical fiber Bragg grating sensor and manufacturing method thereof
InactiveCN102192763ASimple packaging processLow priceMountingsConverting sensor output opticallyFiberCarbon fibers
The invention discloses a carbon fiber packaged optical fiber Bragg grating sensor and a manufacturing method thereof. By being packaged in a carbon fiber, the optical fiber Bragg grating has an excellent sensing character and maximum data linearity of 0.99949. The designed sensor has the advantages that the packaging process is simple and the material cost is low. Various individual long-term tests show that the wavelength drifting of the sensor is 0, the repeatability and stability are excellent, and the sensor is fit for large-scale batch production and meets the demand of long-term use.
Owner:黄堃
Acetone sensor, preparation method and acetone detection method
InactiveCN112666230AHigh sensitivityThe synthesis method is simpleMaterial resistanceCobalt oxides/hydroxidesCOBALTOUS NITRATESolvent
The invention belongs to the technical field of gas sensor preparation, and discloses an acetone sensor, a preparation method and an acetone detection method. Cobalt nitrate is used as a metal salt, an ethanol / water mixed solution is used as a solvent, ammonium fluoride is used as a surfactant, and an okra-shaped Co3O4 material is successfully prepared through a one-step chemical hydrothermal method; and materials are coated according to a side-heating device process, assembling and welding are carried out to finish the preparation of the okra-shaped Co3O4 sensor. The Co3O4 gas sensitive material is successfully synthesized through a one-step hydrothermal method. The synthesis method is simple and low in cost. According to the invention, a one-step hydrothermal method is adopted, ammonium fluoride is used as a structure-directing agent, the composition of the solvent is changed, the construction of a hierarchical structure is successfully achieved, the synthesis method is simple, and the cost is low. The acetone sensor has excellent gas sensitivity, the sensitivity is 35.2, the optimal working temperature is 150 DEG C, and effective detection of acetone in a low-temperature and high-humidity environment is achieved.
Owner:XIDIAN UNIV
Gas sensing device and sensing method
ActiveCN111257393AGreat operational advantageReduced response (recovery) timeMaterial analysis by electric/magnetic meansAir quality improvementEngineeringMaterials science
The invention provides a gas sensing device. The sensing device comprises a flexible sensing component and a strain providing component, wherein the flexible sensing component comprises a flexible substrate, a MoS2 sensing layer arranged on the substrate, and electrodes arranged at two ends of the MoS2 sensing layer, the strain providing part 20 is used for providing strain for a flexible sensingpart 10, an illumination providing component can be further included, and illumination conditions are provided for the flexible sensing component. The sensing device shows higher sensitivity in a flexible sensing part activated by illumination and piezoelectric photoelectronic effects, and the response (recovery) time of the sensing device is sharply shortened.
Owner:BEIJING INST OF NANOENERGY & NANOSYST
Fiber grating sensor based on settlement measurement of transformer substation
ActiveCN106092043AImprove work efficiencyImprove accuracyHeight/levelling measurementEngineeringFiber gratings
The invention discloses a fiber grating sensor based on settlement measurement of a transformer substation. The fiber grating sensor comprises a first connecting piece (1), an optical fiber Bragg grating (2), a second connecting piece (3), an extension spring (4) and a third connecting piece (5) which are connected in sequence from top to bottom, wherein the first connecting piece (1) is also fixedly connected to a reference point on a reference plane; the third connecting piece (5) is also fixedly connected with precipitates of the transformer substation. Compared with the prior art, an optical fiber settlement sensor can be used for accurately converting settlement displacement into tensile stress acting on the optical fiber Bragg grating, further converting the tensile stress into an optical parameter transmitted in an optical fiber, and obtaining an accurate settlement displacement by solving a transmission optical spectrum, so that the working efficiency of working personnel is increased, and a large amount of settlement data is acquired in real time; the monitoring time is short, the influences of severe environments are avoided, and the accuracy is increased greatly.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER
Amperometric Sensor and Method for the Detection of Gaseous Analytes Comprising A Working Electrode Comprising Edge Plane Pyrolytic Graphite
InactiveUS20100147705A1Cost reductionExcellent signalWeather/light/corrosion resistanceVolume/mass flow measurementEnvironmental chemistryWorking electrode
An electrochemical sensor and method of detecting gaseous analytes are provided, which involve the use of a working electrode comprising edge plane pyrolytic graphite.
Owner:ISIS INNOVATION LTD
Preparation method and application of segmented copolymer semiconductor nanowire with spiral structure
ActiveCN108365096ADensity regulationDiameter regulationMaterial nanotechnologySolid-state devicesSemiconductor materialsNanowire
The invention discloses preparation method and application of a segmented copolymer semiconductor nanowire with a spiral structure. The preparation method comprises the steps of respectively dissolving a segmented copolymer semiconductor material and a polymer insulation material in solvents, and performing mixing to form a mixed solution; and obtaining the segmented copolymer semiconductor nanowire with the spiral structure and having different density and diameters by controlling a mass ratio of the segmented copolymer semiconductor material and the polymer insulation material. The segmentedcopolymer semiconductor nanowire can be used as a semiconductor layer of an ammonia gas sensor of an organic field-effect transistor, the ammonia gas sensitivity can be improved, the detection limitis reduced, and moreover, the density and the diameter of the nanowire can be changed by changing a preparation process condition. The segmented copolymer semiconductor nanowire with the spiral structure is initially prepared by a mixing method and is used for ammonia gas sensing, and relatively high sensitivity is obtained.
Owner:HEFEI UNIV OF TECH
Artificial surface plasmon-based polarization sensor
InactiveCN106526337AImprove sensing characteristicsSimple structureElectromagentic field characteristicsThin metalMicrowave
The present invention belongs to the metamaterial sensor technical field and provides a polarization sensor structure for realizing sensor functions in microwave low frequency bands, in particular an artificial surface plasmon-based polarization sensor. The artificial surface plasmon-based polarization sensor is characterized in that: subwavelength periodic trenches are formed in an ultra-thin metal cylindrical structure; the trenches are filled with dielectric materials; the dielectric constants of the materials are uniform; the depths of the trenches in the cylinder are different; the center of a cylindrical portion with no trenches formed inside does not overlap with the center of the structure of the whole cylinder; when electromagnetic waves enter the surface of the structure, a probe at one side of the structure can detect different field intensities for the electromagnetic waves which enter the structure from different directions, so that the function of the sensor can be realized. The sensor has the advantages of simple manufacture, low cost and high economic efficiency.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Method for arranging uniform-speed pipe flow meter in variable-air-volume air conditioner terminal unit
ActiveCN111859662AHigh precisionImprove economyDesign optimisation/simulationSpecial data processing applicationsAir volumeAir velocity
The invention discloses an arrangement method of a uniform-speed pipe flowmeter for measuring the air supply volume of a variable-air-volume air conditioner terminal unit, which comprises the following steps of: S1, performing computer modeling simulation on the terminal unit to obtain the characteristics of an air flow field in an air duct; selecting an m * n position array in the air duct as a preset position of the flow meter; s2, respectively performing calculating according to the preset height of the flowmeter, and comparing the consistency of the airflow velocity distribution curve andthe theoretical wind speed value on the section of the same height to obtain a corresponding optimal horizontal position; and S3, based on the optimal layout position, taking the intersection point ofthe airflow speed distribution curve and the theoretical air speed value under the preset air volume as a measuring hole of the flow meter, comparing the average relative error between the speed measurement value and the theoretical air speed value under other air volumes, and determining the optimal layout scheme. The whole process information of air flowing through the variable-air-volume air conditioner terminal unit is obtained through the computer simulation technology, accurate measurement of the air supply volume of the terminal unit is achieved, and the regulation and control performance of operation of the variable-air-volume air conditioner system is guaranteed.
Owner:泰州市都瑞堡船舶设备有限公司
Graphene-sensitized optical fiber lactic acid sensor and preparation method thereof
ActiveCN111781152AEnhanced evanescent field strengthImprove bindingPhase-affecting property measurementsLiquid/solution decomposition chemical coatingGrapheneLactic acid measurement
The invention discloses a graphene-sensitized optical fiber lactic acid sensor and a preparation method thereof. The graphene-sensitized optical fiber lactic acid sensor comprises an optical fiber anda nickel-plated layer; a graphene layer grows at the polishing and grinding area of the optical fiber after fused biconical taper, and the nickel plating layer is coated at the graphene layer. The method includes tapering the single-mode optical fiber, enabling graphene to directly grow in an optical fiber polishing and grinding area by adopting a chemical deposition method to form a complete anduniform graphene layer, so that a nickel sensitive material is stably combined with an optical fiber, and a novel optical fiber lactic acid sensor based on graphene is manufactured and has good linear fitting degree and repeatability for low-concentration lactic acid measurement.
Owner:DEZHOU UNIV
Helical structure block copolymer semiconductor nanowire preparation method and use thereof
ActiveCN108365096BDensity regulationEasy to operateMaterial nanotechnologySolid-state devicesSemiconductor materialsNanowire
The invention discloses a method for preparing a helical structure block copolymer semiconductor nanowire and its application. The block copolymer semiconductor material and the polymer insulation material are respectively dissolved in a solvent and then mixed to form a blend solution. By controlling the block The mass ratio of the copolymer semiconductor material and the polymer insulating material can obtain block copolymer semiconductor nanowires with different densities and diameters of helical structures. The block copolymer semiconductor nanowire of the present invention can be used as the semiconductor layer of an organic field-effect transistor ammonia sensor, which can improve the sensitivity of ammonia sensing and reduce the detection limit, and the nanowire can be changed only by changing the preparation process conditions. density and diameter. The present invention firstly prepares the block copolymer semiconductor nanowire with helical structure through the blending method, applies it to ammonia sensing and obtains higher sensing performance.
Owner:HEFEI UNIV OF TECH
A kind of onoo-fluorescent probe, preparation method and application thereof
ActiveCN112358440BEasy to manufactureHigh selectivityOrganic chemistryFluorescence/phosphorescenceFluoProbesFluorescence
The invention discloses an ONOO ‑ A fluorescent probe, a preparation method and an application thereof belong to the technical field of fluorescent probes. ONOO of the present invention ‑ The structural formula of the fluorescent probe is: ONOO of the invention ‑ Fluorescent probes have high sensitivity and selectivity, and can detect ONOO ‑ Quick response, with good promotion and application value.
Owner:SHANDONG FIRST MEDICAL UNIV & SHANDONG ACADEMY OF MEDICAL SCI
ONOO<-> fluorescent probe as well as preparation method and application thereof
ActiveCN112358440AEasy to manufactureHigh selectivityOrganic chemistryFluorescence/phosphorescenceFluoProbesFluorescence
The invention discloses an ONOO<-> fluorescent probe as well as a preparation method and application thereof, and belongs to the technical field of fluorescent probes. The structural formula of the ONOO<-> fluorescent probe is shown in the specification, and the ONOO<-> fluorescent probe is high in sensitivity and good in selectivity, can quickly respond to ONOO<-> and has good popularization andapplication value.
Owner:SHANDONG FIRST MEDICAL UNIV & SHANDONG ACADEMY OF MEDICAL SCI
An acetone sensor based on MOF-derived oxygen-vacancy-rich α-Fe2O3 and its preparation method.
This invention discloses an acetone sensor based on MOF-derived oxygen-vacancy-rich α-Fe₂O₃ and its fabrication method. The aforementioned acetone gas sensor has a planar structure, including an Al₂O₃ ceramic sheet, a pair of interdigitated gold electrodes printed on the upper surface of the Al₂O₃ ceramic sheet, a RuO₂ heating film printed on the lower surface of the Al₂O₃ ceramic sheet, a pair of strip-shaped gold electrodes printed on the surface of the RuO₂ heating film, a gas-sensitive film coated and fixed to the surface of the interdigitated gold electrodes, platinum wire leads I, II, III, and IV. The gas-sensitive film uses an oxygen-vacancy-rich α-Fe₂O₃ sensitive material. This invention can produce an acetone sensor with excellent acetone sensitivity characteristics, enabling efficient detection of low concentrations of acetone. It overcomes the problems of insufficient sensitivity and slow response speed of traditional gas sensors in acetone detection. Furthermore, the acetone sensor fabrication process is highly compatible with existing microfabrication technologies, meeting the needs of industrial production.
Owner:WEIFANG MEDICAL UNIV
Optical fiber sensor based on graphene-based composite structure and preparation method thereof
ActiveCN111413373AImprove response rateFast responseFinal product manufacturePhase-affecting property measurementsPhysical chemistryGraphite
The invention discloses an optical fiber sensor based on a graphene-based composite structure and a preparation method thereof. The sensor comprises a sensor body structure processed by a fused biconical taper method, and the waist area of the sensor body structure is in a micro-nano scale; the waist area is arranged on the surface of the graphene film; gas-sensitive metal oxide films are sputtered on the exposed surface of the waist region and the surface of the graphene film; the waist region and the graphene film are connected into an integrated structure through the metal oxide film; a sensing area of a one-dimensional columnar structure formed by an optical fiber is extended and coupled into a sensing area of a two-dimensional structure; according to the sensor disclosed in the invention, the action range of an evanescent field is expanded, and the excellent mechanical property and adsorption property of graphene are combined, so that on the premise of ensuring the sensitivity ofthe sensor, the conical region structure of the sensing region is effectively fastened, the waist region of the optical fiber is completely protected from being damaged, and the practicability of thesensor is enhanced. The detection sensitivity and the response rate of the optical fiber sensor can be further improved.
Owner:XI'AN PETROLEUM UNIVERSITY
A kind of preparation method of ultra-thin film and organic field effect transistor sensor based on it
ActiveCN107192755BEasy to operateGood repeatabilityMaterial analysis by electric/magnetic meansOrganic solventOrganic field-effect transistor
The invention discloses an ultrathin film and a preparation method of an organic field-effect transistor sensor based on the ultrathin film. The preparation method is characterized by comprising the following steps: blending a polymer semiconductor material and a polymer insulating material in an organic solvent, and performing spin-coating to form a double-layer film; dissolving to remove the polymer insulating material film by adopting a good solvent, and obtaining the ultrathin film of the polymer semiconductor material; evaporating an electrode on the film, thereby obtaining the organic field-effect transistor sensor. The ultrathin film disclosed by the invention has the advantages of simple operation, high repeatability, low requirements on equipment and process conditions, no need of large precise instruments and equipment and the like; because the active layer has ultrathin thickness, the obtained sensor in the invention has the advantages of high sensitivity, high selectivity, low detection limit and the like, and has an important application prospect in the aspect of improving the sensing property of a gas sensor.
Owner:HEFEI UNIV OF TECH
Toroidal line filter and method of winding coil of toroidal line filter
InactiveCN1763871AImprove sensing characteristicsImpedence networksTransformers/inductances coils/windings/connectionsCapacitanceConductor Coil
Disclosed is a loop line filter having coils wound through different winding steps, so that induction characteristics to specific frequencies can be improved by changing the current flow direction and / or area, whereby the loop line filter can compensate for specific frequencies. Poor EMI characteristics over frequency without adding additional components such as inductors or capacitors. The toroidal line filter includes a toroidal core and a coil wound around the toroidal core. The coil is constructed in such a way that the first coil is wound not the entire area but a specific partial area, and then the second coil is wound around the remaining area of the annular core.
Owner:HEWLETT PACKARD DEV CO LP
High-entropy oxide supported lanthanum ferrite gas sensing material, preparation method and application thereof
The application discloses a high-entropy oxide loaded lanthanum ferrite gas-sensitive material and a preparation method and application thereof, and comprises the following steps: preparing lanthanum ferrite powder; dispersing the lanthanum ferrite powder in water, adding citric acid, and then performing ultrasonic treatment under ice water bath conditions to obtain a surface-modified base suspension liquid; under ice water bath and stirring conditions, dropping a high-entropy complex mother liquor into the base suspension liquid, then adding urea, and performing hydrothermal reaction to obtain a precipitate; washing and drying the precipitate, and then performing stepwise temperature increasing calcination in air. The sensor prepared from the gas-sensitive material has a low baseline resistance of 11 MΩ at an optimal working temperature of 180 DEG C, a response degree of 45.24 to 50 ppm of acetone, and an optimal working temperature which is reduced by 75 DEG C than that of a pure LaFeO3 sensor; the response and recovery times are shortened to 23.38 seconds and 8 seconds respectively, and the sensor exhibits excellent kinetic characteristics.
Owner:HUNAN UNIV
TiO2 Film Coated Tilt Fiber Grating Refractive Index Sensor and Detection System
ActiveCN108680531BImprove perceptionEfficient use ofPhase-affecting property measurementsRefractive indexPolarization coupling
The invention discloses a titanium dioxide film coating inclined fiber grating refractive index sensor and a detection system. Inclined fiber grating is coated with a titanium dioxide film to serve asa sensor, polarized light is input to enter a great inclined angle grating area of the sensor and then is coupled to an s polarization state TE0, a j coating film or a p polarization state EH2; the jcoating film, not the traditional HE / EH1, can work in the s polarization state TE0 and j or p polarization state EH2 by further regulating and controlling the polarization coupling characteristic anda resonance parameter of the sensor; the j coating film is in a double-peak resonance state, TE0, j and EH2; the j coating film has specific HE / EH1; the j coating film has sensitive environment response characteristic, so the interaction degree of the sensor and a to-be-detected substance is enhanced and more excellent sensing characteristic is achieved; further, the scheme effectively utilizes afiber mode resource and is favorable for developing optical fiber sensors with multiple parameters, more excellent spectrums and sensing characteristic.
Owner:WENZHOU UNIVERSITY
Graphene-enhanced tilted fiber grating leaky-mode resonant sensor and its detection system
ActiveCN109187442BRaise the resonanceImprove sensing characteristicsMaterial analysis by optical meansGratingSpectrum analyzer
The invention belongs to the technical field of optical fiber sensing, and in particular relates to a graphene-enhanced tilted fiber grating leakage mode resonant sensor with excellent characteristics such as high sensitivity, high measurement accuracy, and fast response speed for small changes in low-refractive-index objects to be measured and its detection. A system comprising a light source, a polarization controller, a sample cell to be tested, a tilted fiber grating, and a spectrum analyzer, wherein the tilted fiber grating includes a core and a cladding, and the core region is written with a tilt angle of 6 to 10° The cladding surface of the inclined grating area is coated with graphene, and the two ends of the graphene are coated with metal film electrodes. By changing the voltage on the metal electrode, the photoelectric properties of graphene can be dynamically adjusted, thereby enhancing the leaky mode resonance of the tilted fiber Bragg grating. The leaky mode resonance has better sensing characteristics than the existing resonance technology, especially for low refractive index regions. The leakage mode resonance exhibits higher sensing sensitivity and sensing accuracy for detecting small changes in substances.
Owner:WENZHOU UNIV
Sensor device and parameter optimization method based on tilted fiber grating surface plasmon resonance
ActiveCN107860750BTake advantage ofSensitive environmental response characteristicsMaterial analysis by optical meansGratingSpectrum analyzer
Owner:WENZHOU UNIV
A composite electrode and its preparation method and application
ActiveCN112730553BHigh sensor responsivenessImprove stabilityMaterial electrochemical variablesComposite electrodeAlloy
The invention discloses a composite electrode and a preparation method and application thereof. Co of the present invention 3 O 4 The / NPG / Au composite electrode includes a gold electrode, a porous Au-Sn alloy layer and a nano-Co layer arranged in sequence from the inside to the outside 3 O 4 A deposition layer, the preparation method of which comprises the following steps: 1) depositing a porous Au-Sn alloy layer on the surface of the gold electrode by electrodeposition-dealloying to obtain an NPG / Au electrode; 2) depositing on the surface of the NPG / Au electrode by electrodeposition Nano Co 3 O 4 layer, that is, Co 3 O 4 / NPG / Au composite electrode. Co of the present invention 3 O 4 The / NPG / Au composite electrode can instantly detect the content of hydroquinone and catechol in water, has high sensing responsiveness, good stability and good anti-interference performance, and can be recycled for many times , the preparation method is simple.
Owner:SOUTH CHINA UNIV OF TECH +1