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Bio-electrical impedance measuring method and apparatus
InactiveCN101194834AHigh measurement accuracyReduce mistakesDiagnostic recording/measuringSensorsPhysicsMeasurement device
The invention discloses a measuring method of biological electric impedance, which is characterized in that the method comprises constant-current outputting the sine wave pumping signal with preset frequency to the measuring electrode which is arranged in a region for measuring, inspiring the region for measuring, receiving and magnifying the analog signal which passes through the region for measuring, A / D converting the analog signal, extracting a plurality of digital signals in one cycle of A / D conversion, calculating a group of impedance values corresponding to a plurality of digital signals through the fast Fourier algorithm, calculating the impedance values of different frequency points in the range of preset frequency through repeating above steps to form an impedance frequency diagram, and calculating the characteristic parameter of the region for measuring at the time point through coincidence circularity method according to the impedance frequency diagram. The invention provides pure electrical signal through effectively shielding inference signal, thereby guaranteeing the measurement precision. The invention adopts the fast Fourier algorithm and coincidence circularity method, which improves the precision of impedance calculation and effectively reduces the cost of circuit.
Owner:CHONG QING BORN FUKE MEDICAL EQUIP CO LTD
ZnO/ZnFe2O4 composite sensitive material, preparation method thereof and application of ZnO/ZnFe2O4 composite sensitive material in acetone gas sensor
ActiveCN104749225ALarge specific surface areaIncrease initial resistanceSemi-permeable membranesVolume/mass flow by thermal effectsMicrowaveMicrosphere
The invention belongs to the technical field of metal-oxide gas sensors, and particularly relates to design and synthesis of a composite sensitive material ZnO / ZnFe2O4, and an application of the composite sensitive material ZnO / ZnFe2O4 in an acetone gas sensor. In the preparation and preparation processes of the sensitive material, ZnO hollow microspheres are successfully synthesized first by adopting a microwave heating technology, and then a layer of ZnFe2O4 nanosheets grow on the surfaces of the ZnO hollow microspheres by adopting an epitaxial growth method. The whole synthesis process is simple, highly-efficient, energy-saving and suitable for large-scale production. Compared with ZnO hollow microspheres with a single component, the ZnO gas sensor modified by the ZnFe2O4 nanosheets shows more excellent gas sensitivity to acetone. In addition, the gas sensor of this type is small in size, and low in cost, so that the gas sensor based on the ZnO / ZnFe2O4 heterostructure is more applicable to monitoring acetone gas.
Owner:JILIN UNIV
Hybrid communication system of electric vehicle battery management system
ActiveCN104553852AImprove anti-interference abilityImprove reliabilityElectric vehicle charging technologyVehicular energy storageCommunications systemAutomotive battery
The invention discloses a hybrid communication system of a vehicle battery management controller assembly. The hybrid communication system combines daisy chain communication, serial port communication and CAN communication, and the system comprises a main board 02, a branch board 03, a battery set 04 and a sampling wire harness 05; the main board 02 is connected with the branch board 03 through a CAN bus; the branch board 03 is connected with the battery set 04 through the battery set wire harness 05. The inside of the branch board uses the simple daisy chain communication and serial port communication, and the branch board communicates with the main board through the more mature CAN communication with stronger anti-interference ability; the hybrid communication system of the vehicle battery management controller assembly is capable of improving the anti-interference ability and reliability of the whole system and lowering the system cost.
Owner:深蓝汽车科技有限公司
Occluded foreign substance in metal materials particle-size in-situ statistical distribution analysis method
InactiveCN1609591AComprehensive testing informationEnables in situ state analysisParticle size analysisColor/spectral properties measurementsContinuous scanningMetallic materials
The present invention belongs to the field of physical property measurement and analysis of material, and relates to the grain size calculation for various inclusions in metal material. The in-situ counting and analysis of inclusions in metal material includes the following steps: conventional analysis to obtain relevant data of the grain size distribution of various inclusions in the sample via metal structure detection, chemical phase state analysis, and electronic microscope plus energy spectrum analysis; in-situ statistical analysis with in-situ metal analyzer for continuous scanning of the sample to obtain single spark spectrum strength data corresponding to the original position of the sample; system analysis to obtain single spark spectrum strength data and determine signal threshold; establishing mathematic analysis mode and comparing the data obtained in different methods to obtain the grain size distribution information of various kinds of inclusions and output result.
Owner:CENT IRON & STEEL RES INST
Multi-frequency information fusion-based intelligent positioning system and method
InactiveCN103310442AApplicable monitoringApplicable preservationImage analysisClosed circuit television systemsInformation analysisData information
The invention discloses a multi-frequency information fusion-based intelligent positioning system and a multi-frequency information fusion-based intelligent positioning method. The intelligent positioning system comprises a plurality of electric three-variable CCD (charge coupled device) cameras which are provided with controllable holders and are distributed in a monitored region; the CCD cameras are communicated with a terminal; each object to be monitored carries an electronic tag; a plurality of wireless sensors are arranged on the periphery of the monitored region; the wireless sensors acquire the data information of the electronic tags; meanwhile, each wireless sensor is communicated with the terminal; and the terminal tracks the position of the object to be monitored according to the acquired data information. By the method, the aim of positioning and tracking accurately is fulfilled by performing information analysis and fusion on shot data.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Traffic load pavement vibration energy piezoelectric power generation measuring method and system thereof
ActiveCN103116133ASimple structureApplicable monitoringDynamo-electric machine testingElectricityRoad surface
The invention discloses a traffic load pavement vibration energy piezoelectric power generation measuring method and a system thereof. The traffic load pavement vibration energy piezoelectric power generation measuring system comprises a piezoelectric transduction unit, a total control module and a total measuring module which are arranged on a pavement. The piezoelectric transduction unit is used for converting pavement vibration energy into electric energy. The total control module is used for regulating speed and applying load for running vehicles and regulating electric parameters for output electric power. The total measuring module is used for measuring speed and load of a vehicle, stress and deformation of the pavement, harvested alternating-current and voltage, and transduced voltage and current. The generated electric energy can be used as a power supply to be stored and utilized. According to above condition, the traffic load pavement vibration energy piezoelectric power generation measuring system provides conditions for researching a mechanism of a pavement piezoelectric energy harvesting technology, application and popularization of the technology, and has a high academic value and social value.
Owner:杭州东南吉通网络有限公司
Metal in-situ statistical-distribution analysis method
InactiveCN1375692AComprehensive test informationStrong contrastAnalysis by electrical excitationChemical compositionUltimate tensile strength
The metal in-situ statistical distribution analysis method, mainly relates to chemical components and its state analysis of metal amterial, which includes the following steps: exciting light-source system to implement precombustion-free continuous excitation of sample and synchronous scanning location, making excited spectrum become into linear spectrum, collecting and recording spectrum intensity of single spark discharge, statistically analyzing collected and stored spectral line intensities of linear spectrums, using computer to process said data so as to measure the parameters of chemicalcomponent, segregation, looseness and foreign impurity distribution of sample.
Owner:NCS TESTING TECH
Steering gear control system and method based on fuzzy neural PID control and absolute encoder
PendingCN108196442AStrong self-learning abilityAchieve precise controlAdaptive controlSteering angleControl system
The invention relates to a steering gear control system and method based on fuzzy neural PID control and an absolute encoder. The system comprises a fuzzy neural PID control unit, the absolute encoder, a serial communication unit and a host computer. The host computer and the fuzzy neural PID control unit are connected through the serial communication module. The output end of the absolute encoderis connected with the input end of the fuzzy neural PID control unit. The absolute encoder is used to acquire the steering angle information of a steering gear. The serial communication module is used to receive the control information of the host computer, transmit the control information to the fuzzy neural PID control unit, and send the position information of the absolute encoder to the hostcomputer. The fuzzy neural PID control unit receives the control information of the host computer, drives the absolute encoder to rotate, calculates steering gear control parameters to generate a PWMsignal, and outputs the PWM signal to the steering gear. The steering gear control system and method based on fuzzy neural PID control and the absolute encoder have high control precision, and solve the problem that the existing steering gear control technology has poor adaptability and robustness and is not flexible to the joint motion of a robot.
Owner:GUANGZHOU UNIVERSITY
Nuclear power station thermal energy efficiency monitoring and diagnosing system and method
ActiveCN105527113AApplicable monitoringApplicable diagnosisStructural/machines measurementThermal energyDistribution matrix
The invention provides a nuclear power station thermal energy efficiency monitoring and diagnosing system and method. The monitoring and diagnosing system comprises a storage module, a data acquisition module, a core calculation module, and a diagnosis module. The data acquisition module is used for obtaining nuclear power station secondary circuit basic parameters measured by a monitoring system instrument and process parameters of a distributed control system; the core calculation module is used for calculating measured values of thermal power performance parameters of the nuclear power station secondary circuit, wherein an energy efficiency calculation model of the nuclear power unit is established on the basis of an energy efficiency distribution matrix equation established for the nuclear power station secondary circuit, and the unit specific heat consumption of the nuclear power station secondary circuit is calculated; the diagnosis module is used for determining whether the thermal power performance parameters are abnormal or not by comparing the measured values of thermal power performance parameters of the nuclear power station secondary circuit with operational reference values. According to the system and method, an energy efficiency distribution matrix equation is established for the nuclear power station secondary circuit; indexes such as unit specific heat consumption are obtained through establishing the energy efficiency calculation mode; and therefore a set of thermal energy efficiency monitoring index system is developed for a nuclear power station.
Owner:中广核工程有限公司 +1
Nonlinear identification method for mine water inrush source
InactiveCN106971073AOptimize learning parametersReduce training parametersCharacter and pattern recognitionInformaticsKernel principal component analysisWater source
The invention relates to a nonlinear identification method for a mine water inrush source. The method comprises the following steps of (1) collecting spectrum data; (2) preprocessing the collected original spectrum data by utilizing a Savitzky-Golay (SG) smoothing technology; (3) performing data dimension reduction by utilizing a nonlinear kernel principal component analysis method, and performing nonlinear feature extraction; (4) establishing independent test set and training set by collected water samples; and (5) establishing an ELM by utilizing the training set, and then performing classification result testing through the test set. According to the method, the feature extraction is performed in a nonlinear way, so that the time and space complexity is lowered and the sample identification performance is provided; the kernel principal component analysis optimizes learning parameters of the ELM; an ELM classification model has the characteristics of few training parameters, high learning speed and the like; the KPCA and the ELM are combined for nonlinear identification of the mine water inrush source; and the method is very suitable for online water inrush source monitoring.
Owner:ANHUI UNIV OF SCI & TECH
Piezoelectric film sensor with elliptical flexible substrate
ActiveCN107830877AHigh sensitivitySmall sizeConverting sensor output electrically/magneticallySize parameterElectricity
The invention belongs to the technical field of sensors and provides a piezoelectric film sensor with an elliptical flexible substrate. The piezoelectric film sensor comprises a piezoelectric film, aflexible substrate and an insulating protective layer. The flexible substrate of the piezoelectric film sensor is semi-elliptic cylindrical curved structure. The piezoelectric film covers the flexiblesubstrate and is fixed through the insulating protective layer. According to the flexible substrate structure, sensors are divided into an equal-arc-length ellipse elliptic flexible substrate sensorand an equal-chord-length elliptical flexible substrate sensor. According to the piezoelectric film sensor, through simulating and calculating output voltage of piezoelectric film sensors with semi-elliptical flexible substrates of different size parameters under the same action force, and an optimal flexible substrate size is determined, which means that the output voltage is taken as a basis ofdetermining the sensor flexible substrate size. The piezoelectric film sensor has higher sensitivity, and the miniaturization and arraying of sensors are facilitated.
Owner:DALIAN UNIV OF TECH
Construction method of seed melon HPLC (High Performance Liquid Chromatography) fingerprint spectrum and standard fingerprint spectrum thereof
ActiveCN102590384AApplicable monitoringAdvanced detection meansComponent separationBiotechnologyHplc fingerprint
The invention provides a construction method of a seed melon HPLC (High Performance Liquid Chromatography) fingerprint spectrum and a standard fingerprint spectrum thereof. A seed melon is deseeded, melon pulp is taken out and is arranged in a juice stirrer to be smashed for 30s, and filtrate which is seed melon juice is leached and filtered with a filter membrane of 0.45 mum, and then is used as a sample solution. HPLC analysis is carried out on the sample solution, the chromatographic column is SinochromODS-BPC18, 5mum, 250*4.6mm, the column temperature is 25 DEG C, the flowing phase is methanol and 0.2% of acetic acid water, a gradient elution way is adopted, the detection wavelength is 260 nm, and the seed melon HPLC fingerprint spectrum is obtained. 10 batches of seed melon HPLC fingerprint spectrums are compared to determine the common fingerprint characteristics and obtain the seed melon standard fingerprint spectrum. The standard fingerprint spectrum can be used for effectively monitoring the quality of seed melons and seed melon highly processed products.
Owner:兰州大学科技园有限责任公司 +1
Attitude adjustable surrounding rock stress measurement device
ActiveCN106525292AAccurate measurementGuaranteed accuracyForce measurementObservational errorMeasurement device
The invention discloses an attitude adjustable surrounding rock stress measurement device, which comprises a stress gauge body (1) and a display instrument box (2), wherein the stress gauge body (1) is in a cylindrical shape integrally, the top end of the stress gauge body (1) is configured into a conical structure, a pressure-bearing cavity is formed in the stress gauge body (1), and a pressure-bearing block (3), a circumferential rotation angle adjusting mechanism (4), a gravity sensor (5) and a quick connector (6) are arranged on the stress gauge body (1); and the display instrument box (2) comprises a controller, a display screen, a hydraulic pump station, a control valve bank, a circumferential rotation control circuit, a pressure-bearing block control loop and a stress numerical value acquisition and calculation loop. The attitude adjustable surrounding rock stress measurement device can realize the attitude adjustment of the stress gauge body in a drill hole, further realizes the effect of maximally reducing the measurement errors caused by drill hole deviation and axial deflection when a surrounding rock stress gauge is placed into the drill hole, achieves the precise measurement of surrounding rock stress, and is especially suitable for data acquisition and monitoring of coal mining stress.
Owner:CHINA UNIV OF MINING & TECH
Multi-mode coupling miniature electric field sensing device based on piezoelectric effect and piezoresistive effect
ActiveCN109212326AGuaranteed temperature stabilityAccurate measurementElectromagentic field characteristicsElectric field sensorHigh field
The invention discloses a multi-mode coupling miniature electric field sensing device based on a piezoelectric effect and a piezoresistive effect. The miniature electric field sensing device comprisesa horizontally placed semiconductor thin film, a horizontally placed substrate is arranged under the semiconductor thin film, a cavity structure is formed between the semiconductor thin film and thesubstrate through support of a middle interlayer, an upper surface of the semiconductor thin film is evenly provided with a piezoresistive material, the piezoresistive material comprises a transverse-transverse mode piezoelectric film and a transverse-longitudinal mode piezoelectric block, and in a transverse-transverse mode, a top surface of the semiconductor thin film is provided with the piezoelectric film; and in a transverse-longitudinal mode, a bottom surface of the semiconductor thin film is provided with the piezoelectric block. The multi-mode coupling miniature electric field sensingdevice based on the piezoelectric effect and the piezoresistive effect, provided by the invention, has the beneficial effects of being small in volume and highly integrated, effectively reducing circuit temperature drift, reducing zero drift, improving measurement accuracy, being capable of realizing electric field accurate measurement under wide band, high field intensity and complex environment,and also being capable of being mounted and maintained in the case of being electrified.
Owner:TSINGHUA UNIV
Test paper for rapidly detecting uric acid in saliva
InactiveCN108593633ASecurity meansMonitoring health is convenientMaterial analysis by observing effect on chemical indicatorCard stockTreatment timing
The invention relates to a test paper for rapidly detecting uric acid in saliva. The test paper comprises a plastic card paper and a test paper block pasted to one end of the plastic card paper; and the test paper block is impregnated with an enzyme developer solution. The test paper is produced through pasting the test block impregnated with the enzyme developer solution to one end of the plasticcard paper. A production technology of the test paper has the advantages of simplicity, low cost, and facilitation of large-scale production. Additionally, the detection process realizes semi-quantitative detection of the concentration of uric acid based on the color development reaction principle of coupled endpoint colorimetry, the test paper ahs a good stability at 35 DEG C, is convenient fora patient to autonomously carry in order to monitor the uric acid, and is beneficial for the patient to timely find the disease condition and select optimum treatment timing. The test paper is also suitable for monitoring uric acid in urine.
Owner:SUN YAT SEN UNIV
System for monitoring environment in precision casting room
A system for monitoring an environment in a precision casting room comprises a power supply module, a control module, a temperature detection module, a humidity detection module, an illumination detection module, a carbon dioxide concentration detection module, an ozone detection module, a clock module, a keyboard input module and an LCD display module, wherein the temperature detection module, the humidity detection module, the illumination detection module, the carbon dioxide concentration detection module, the ozone detection module, the clock module, the keyboard input module and the LCD display module are respectively connected with the control module; and the control module adopts an STC single chip microcomputer. The system of the invention is based on the STC12C5A60S2 single chip microcomputer and realizes functions of temperature and humidity detection, carbon dioxide concentration detection, indoor illumination detection, ozone detection and clock display; the system is convenient in use, simple in structure and applicable to environment detection in the precision casting room.
Owner:CHENGDU XINGYU PRECISION CASTING
Long-distance steel rail damage detector
PendingCN107664662AGet rid of the problem of direct directed propagationGet rid of problems suitable for close range detectionAnalysing solids using sonic/ultrasonic/infrasonic wavesStress changeCondition monitoring
The invention provides a long-distance steel rail damage detector, belonging to the technical field of railway safety detection. The long-distance steel rail damage detector comprises a synchronous acoustic wave generating module, an acoustic wave receiving module and an ultrasonic analysis module, wherein the synchronous acoustic wave generating module comprises an ultrasonic transducer, an ultrasonic generator, a first single-chip microcomputer synchronous controller, an echo detection analyzer and a first wireless data transmitter, a synchronous control module comprises an acoustic emissionsensor, an amplifier, a second single-chip microcomputer synchronous controller and a second wireless data transmitter, and the ultrasonic analysis module comprises an acoustic emission capture card,an ultrasonic rail condition monitoring module, an acoustic emission rail condition monitoring module, a high-speed rail stress monitoring and stress change analysis module, a rail fracture / damage comprehensive analysis and early warning module and a display. The detector directly feeds ultrasonic energy into a steel rail by utilizing ultrasonic propagation characteristics on a solid surface, soas to analyze the running situations of a road segment, and timely report the situations of rail fracture and crack.
Owner:西安交通工程学院
Moisture-proof performance detection machine and detection method for edge-sealed plate type furniture
PendingCN113654940APracticalEasy to detectContainer/cavity capacity measurementWeighing by absorbing componentPhysicsDamp proofing
The invention relates to a moisture-proof performance detection machine and detection method for edge-sealed plate type furniture, and relates to the technical field of furniture performance tests. The moisture-proof performance detection machine comprises a furniture test piece, a master control platform, a host platform, a constant-temperature water bath box arranged on the host platform and a transferring assembly, and a negative-pressure clamping assembly is arranged on the outer side of the transferring assembly; the furniture test piece is clamped on the negative pressure clamping assembly, and the negative pressure clamping assembly is driven by the transferring assembly to stretch the furniture test piece into the constant-temperature water bath box to be soaked; and the detection machine further comprises an electronic weighing platform which is arranged on the host platform and electrically connected with the master control platform. Aiming at the conditions that the thicknesses of all positions of the special-shaped edge sealing plate type furniture are different and the to-be-detected point positions are not easy to determine, the volume expansion rate of the furniture test piece can be determined according to different volume values before and after soaking, the moisture resistance of the furniture test piece can be directly reflected, the moisture resistance can be used as a basis for judging the moisture resistance quality of the edge sealing plate type furniture, the detection is convenient and rapid, and the practicability is high.
Owner:安徽省汉博科技有限公司
Multi-protocol centralized communication method for heterogeneous computer clusters
InactiveCN102710476ACross-platformWith characteristicsBus networksIntelligent Platform Management InterfaceOperational system
The invention provides a multi-protocol centralized communication method for heterogeneous computer clusters. A unified computer cluster management network is constructed conveniently through an interface, the management network is independent of a hardware platform and a software operation system and has cross-platform and out-of-band characteristics, compared with traditional block multiplexer channel (BMC) management devices based on an intelligent platform management interface (IPMI) protocol, the management network transmits rich data types, the implementation cost is low, the method is suitable for a complex heterogeneous network environment, and monitoring and management of server clusters is performed.
Owner:LANGCHAO ELECTRONIC INFORMATION IND CO LTD
Metal in-situ statistical-distribution analysis method
InactiveCN1160553CComprehensive test informationStrong contrastAnalysis by electrical excitationChemical compositionUltimate tensile strength
The metal in-situ statistical distribution analysis method, mainly relates to chemical components and its state analysis of metal amterial, which includes the following steps: exciting light-source system to implement precombustion-free continuous excitation of sample and synchronous scanning location, making excited spectrum become into linear spectrum, collecting and recording spectrum intensity of single spark discharge, statistically analyzing collected and stored spectral line intensities of linear spectrums, using computer to process said data so as to measure the parameters of chemical component, segregation, looseness and foreign impurity distribution of sample.
Owner:NCS TESTING TECH
Miniature Electric Field Sensing Device Based on Multimodal Coupling of Piezoelectric Effect and Piezoresistive Effect
ActiveCN109212326BGuaranteed temperature stabilityAccurate measurementElectromagentic field characteristicsElectric field sensorHemt circuits
Owner:TSINGHUA UNIV
Early warning methods for environmental risk sources
ActiveCN104331833BReduce loadAvoid do-not-call situationsData processing applicationsSpecial data processing applicationsEarly warning systemCvd risk
The invention discloses an early warning method for environment risk source, and the method comprises a risk source character threshold value database storing monitoring data, a risk source information database storing the risk source position information and source strength information, the technical point is as follows: 1) calculating risk grade according to the formula, collecting risk source date of local region; 2) building risk early warning system according to the risk source; 3) setting risk source safe threshold value; 4) comparing the risk source monitoring data with the threshold value at real time, once the monitoring data is larger than the limit, calculating the over degree and giving an alarm to the head centre and branch centre. The early warning method for environment risk source can solve the problem that the system overall performance is reduced, the head centre system control load is high and the system structure is complex.
Owner:SHENYANG ACAD OF ENVIRONMENTAL SCI
Construction progress monitoring device and method based on neural network
ActiveCN110674792BSimple structureApplicable monitoringCharacter and pattern recognitionPattern recognitionUncrewed vehicle
The invention relates to a construction progress monitoring method based on a neural network, comprising: step 1: setting up a plurality of cameras around the construction area, step 2: using a drone to guide and set the camera pose, step 3: after setting After the camera poses, you can take pictures at a certain frequency and upload them to the management platform. The management platform uses the neural network for deep learning to identify the construction progress. The monitoring method proposed by the invention can simultaneously take into account training time and recognition accuracy. And it can automatically adjust the camera pose as the construction progresses, and carry out automatic progress monitoring.
Owner:河南四建工程有限公司
A PD/W that improves the performance of hydrogen sensors 18 o 49 Preparation method of composite material
ActiveCN107966479BExcellent gas sensitivityLarge specific surface areaMaterial resistanceNanoparticleCatalytic oxidation
The invention discloses a preparation method of a Pd / W18O49 composite material for improving performance of hydrogen sensors. The Pd / W18O49 composite material is a sea urchin shaped nanosphere which is combined from nanorods, the diameter of the sea urchin shaped nanosphere is 600-800nm, the diameter of the nanorod is 10-15nm, and precious metal palladium nanometer particles are attached to the surface of the nanorods. The sea urchin shaped W18O49 powder comprises a hierarchical structure which is composed of many nanorods, the specific surface area is very large, many active sites are provided for gas reaction, and at the same time the structure is good for adsorption and diffusion of gas; the surface of the sea urchin shaped W18O49 powder is modified with precious metal palladium nano particles which have higher activity for catalytic oxidation of hydrogen. Under combined action of these factors, excellent gas-sensitive characteristics are provided for the composite material.
Owner:XIAMEN UNIV
A Piezoelectric Film Sensor with Oval Flexible Substrate
ActiveCN107830877BApplicable monitoringHigh sensitivityConverting sensor output electrically/magneticallyEllipseMiniaturization
The invention belongs to the technical field of sensors and provides a piezoelectric film sensor with an elliptical flexible substrate. The piezoelectric film sensor comprises a piezoelectric film, aflexible substrate and an insulating protective layer. The flexible substrate of the piezoelectric film sensor is semi-elliptic cylindrical curved structure. The piezoelectric film covers the flexiblesubstrate and is fixed through the insulating protective layer. According to the flexible substrate structure, sensors are divided into an equal-arc-length ellipse elliptic flexible substrate sensorand an equal-chord-length elliptical flexible substrate sensor. According to the piezoelectric film sensor, through simulating and calculating output voltage of piezoelectric film sensors with semi-elliptical flexible substrates of different size parameters under the same action force, and an optimal flexible substrate size is determined, which means that the output voltage is taken as a basis ofdetermining the sensor flexible substrate size. The piezoelectric film sensor has higher sensitivity, and the miniaturization and arraying of sensors are facilitated.
Owner:DALIAN UNIV OF TECH
An application system of an optical fiber sensing probe for detecting the electric charge of a supercapacitor electrode and a preparation method of the optical fiber sensing probe
ActiveCN111273094BRealize in-situ real-time monitoringLow costMaterial analysis by optical meansElectrical measurementsSupercapacitorSurface plasmonic resonance
The invention discloses an optical fiber sensing probe application system and a preparation method of the optical fiber sensing probe for detecting the electric charge of supercapacitor electrodes, and belongs to the technical field of optical fiber sensing technology applied to electrochemistry. The invention solves the problems that the existing supercapacitor electrode charges cannot be detected in real time, and avoids the problem that the temperature change in the charging and discharging process has an influence on the detection results. The invention provides an optical fiber localized surface plasmon resonance (LSPR) sensing technology for supercapacitor monitoring. The sensing region is formed based on the principle of LSPR by adsorbing gold nanoparticles (AuNPs) on the core of the multimode fiber. The optical fiber is implanted inside the supercapacitor to realize in-situ real-time monitoring of the charging and discharging process. Compared with the traditional surface plasmon resonance (SPR) sensor, the optical fiber LSPR sensing probe obtained by the present invention is insensitive to temperature fluctuations, and is more suitable for supercapacitor monitoring.
Owner:HEILONGJIANG UNIV
Intelligent positioning system and its positioning method based on multi-frequency information fusion
InactiveCN103310442BApplicable monitoringApplicable preservationImage analysisClosed circuit television systemsLine sensorInformation analysis
The invention discloses a multi-frequency information fusion-based intelligent positioning system and a multi-frequency information fusion-based intelligent positioning method. The intelligent positioning system comprises a plurality of electric three-variable CCD (charge coupled device) cameras which are provided with controllable holders and are distributed in a monitored region; the CCD cameras are communicated with a terminal; each object to be monitored carries an electronic tag; a plurality of wireless sensors are arranged on the periphery of the monitored region; the wireless sensors acquire the data information of the electronic tags; meanwhile, each wireless sensor is communicated with the terminal; and the terminal tracks the position of the object to be monitored according to the acquired data information. By the method, the aim of positioning and tracking accurately is fulfilled by performing information analysis and fusion on shot data.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Smart lighting monitoring terminal and system and corresponding monitoring method
InactiveCN109526116ARealize automatic monitoringSave energyElectrical apparatusElectric light circuit arrangementSmart lightingMonitoring system
The invention discloses a smart lighting monitoring terminal comprising a communication module, a meter, a processor and a relay. A command input end of the processor is connected to a background server through the communication module, a command output end of the processor is connected to a command signal input end of a street lamp to be tested through the relay, and a street lamp information input end of the processor is connected to the street lamp to be tested through the meter. The invention also discloses a smart lighting monitoring system including the background server and at least onesmart lighting monitoring terminal and a smart lighting monitoring method implemented by using the smart lighting monitoring terminal. Compared with a traditional manual monitoring mode, the monitoring mode of the invention is efficient, intelligent and accurate. The invention is applicable to smart lighting monitoring.
Owner:ZHANGJIAKOU POWER SUPPLY COMPANY OF STATE GRID JINBEI ELECTRIC POWER COMPANY +1
zno/znfe 2 o 4 Composite sensitive material, preparation method and application in acetone gas sensor
ActiveCN104749225BLarge specific surface areaIncrease initial resistanceSemi-permeable membranesVolume/mass flow by thermal effectsHeterojunctionMicrosphere
The invention belongs to the technical field of metal oxide gas sensors, in particular to a composite sensitive material ZnO / ZnFe 2 o 4 The design, synthesis and application in acetone gas sensor. In the process of designing and preparing sensitive materials, the present invention firstly uses microwave heating technology to successfully synthesize ZnO hollow microspheres, and then grows a layer of ZnFe on the surface of ZnO hollow microspheres by means of epitaxial growth. 2 o 4 Nanosheets. The whole synthesis process is simple, efficient and energy-saving, and is suitable for large-scale production. Compared with single-component ZnO hollow microspheres, after ZnFe 2 o 4 The ZnO gas sensor modified by nanosheets can show more excellent gas sensing characteristics to acetone. In addition, this type of gas sensor is small in size and low in cost, making this ZnO / ZnFe-based 2 o 4 The gas sensor with heterogeneous structure is more suitable for the monitoring of acetone gas.
Owner:JILIN UNIV
A dragonfly-like micro-aircraft with double flapping wings
InactiveCN111086634BImprove aerodynamic efficiencyImprove aerodynamic performanceOrnithoptersBall bearingMicro air vehicle
The invention belongs to the technical field of bionic micro-aircraft, and provides a dragonfly-like double-flapping-wing micro-aircraft, which includes a body shell, a body head, a body tail, and four wings symmetrically arranged on both sides of the body shell, each of which The wings are all rotatably connected to the body shell through universal ball bearings, and four control mechanisms for controlling the flapping of the wings and changing the angle of attack of the wings are arranged in the body shell, and each of the wings One end of each passes through the body shell and is connected with its corresponding control mechanism. The micro air vehicle highly simulates the aerodynamic layout design of dragonfly wings. It adopts a double-row layout scheme, which can use the favorable aerodynamic interference between the front and rear wings to achieve high aerodynamic efficiency. Each wing can be individually controlled to achieve individual flapping and pitching. , and then realize a variety of maneuvers, improve aerodynamic performance and maneuverability.
Owner:XIAN AERONAUTICAL UNIV
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