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111results about How to "High data acquisition accuracy" patented technology
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High-speed data acquisition card implemented on basis of hardware
InactiveCN102339324AFor seamless controlHigh data acquisition accuracyData acquisition and loggingSignal conditioning circuitsAudio power amplifier
The invention relates to a high-speed data acquisition card implemented on the basis of a hardware, which comprises a signal conditioning circuit. The signal conditioning circuit consists of a digital gain amplifier and a single ended to differential converter, and is used for inputting an input signal into an analog-to-digital conversion circuit sequentially by the digital gain amplifier and the single ended to differential converter; the analog-to-digital conversion circuit is controlled by a sampling clock signal to acquire the input signal, convert the input signal into a digital signal and input the digital signal into an FPGA (Field Programmable Gata Array) data processor; the FPGA data processor is used for carrying out data buffering on the received digital signal and storing digital signal data into a high-speed dynamic memory controlled by the FPGA data processor; the data is transferred onto a PC (Personal Computer) machine by the cooperative work of an on-chip embedded system in which the FPGA data processor is used as the core and an ARM (Advanced RISC Machines) control module; and a power supply comprises an analog power supply network and a digital power supply network and has an external power supply mode. After the high-speed data acquisition card is adopted, 500MHz analog-to-digital sampling and real-time storing functions can be realized. The high-speed data acquisition card can be widely applied to the field of acquisition of the high-speed signal data.
Owner:CHINA ELECTRIC POWER RES INST +1
System for reproducing collision accident of vehicle and two-wheel cycle
InactiveCN101281661AEfficient collectionEfficient extraction3D-image rendering3D modellingBody shapeElement model
The invention relates to a collision case playback system of the cars and two-wheeler in the computer application technical field, wherein an accident site reconstitution module collects the accident field data and picture, reconstitutes and reverts the site; a two-wheeler driver modularization dummy customizing module builds a dummy model matching with the body shape of the driver, extracts the damaged sensitive parts of the dummy model, sets up a finite element model, becomes a new conbination dummy model combined with the multi-rigid body dummy main body model; a collision process emulating module performs the scaling of model matching with the sufferer bodily form characteristics, meanwhile builds the integral accident site three-dimensional model before the accident, and simulates and computes the primary collision result; an optimization recurrence module builds the optimization flow, optimizes the collision simulation; an accident recurrence result post-processing module displays the optimized simulation result in the collision process animation and the collision parameters. The invention can realizes the site information collection, fast simulation and modelization, short treating period, high precision and high reliability.
Owner:SHANGHAI JIAO TONG UNIV
Full-automatic three-axis testing system for saturated soil stress path
ActiveCN104048879APrecise axial pressure controlHigh accuracy of data acquisition and controlMaterial strength using tensile/compressive forcesStress pathEngineering
The invention discloses a full-automatic three-axis testing system for a saturated soil stress path. The full-automatic three-axis testing system comprises a pressure chamber (1), a computer (2), an axial force volume controller (3), a confining pressure volume controller (4), a back pressure volume controller (5), a data acquisition box (6) and a pressure volume control system connected with the computer (2). The full-automatic three-axis testing system for the saturated soil stress path is reasonable in structural design, convenient to operate, high in automation degree and good in stability and can be used for accurately controlling a complicated stress path of a soil body.
Owner:南京泰克奥科技有限公司
Experiment device for initial laws of tectonic coal gas desorption
InactiveCN103335916AHigh desorption initial velocityHigh initial velocityMaterial analysisWater bathsFour-way valve
The invention discloses a experiment device for initial laws of tectonic coal gas desorption. A high-purity gas steel cylinder is connected with a port of a three-way valve through a stop valve. A port of the three-way valve is connected with a port of a four-way valve through the stop valve. The four-way valve is connected with the stop valve, a vacuum gauge, a vavuum pump, a large-size measuring cylinder and a pressure gage. The three-way valve is connected with the four-way valve through the stop valve directly. The pressure gage is connected with a coal sample tank. The coal sample tank is arranged in a constant-temperature water-bath device. The bottom of the coal sample tank is connected with the constant-temperature water-bath device. A port of the four-way valve is connected with a gas mass flow meter through a spherical valve. One end of the gas mass flow meter is connected with a computer, and the other end of the gas mass flow meter is connected with a desorption instrument. Through the combination of a sensor and a computer, rapid acquisition of gas desorption speed data is achieved. The gas desorption instrument can measure the gas desorption amount synchronously, so that the reaction time of experiment data acquisition is shortened and the data acquisition precision is raised. The experiment device is advantaged by less error and large data acquisition amount.
Owner:HENAN POLYTECHNIC UNIV
Pairing processing method of large-sized and irregular revolving molding surface member
InactiveCN101612713AImprove machining accuracyImprove processing efficiencyMeasurement devicesComputer controlThree dimensional simulationData acquisition
The invention discloses a pairing processing method of a large-sized and irregular revolving molding surface member. In the method, a three-dimensional simulation measuring head is utilized to carry out automatic tracing and measuring and data collection on a practical fitting curved surface of a covering, a data point set [p] of the centre of a sensing finger pommel of the three-dimensional simulation measuring head is obtained, mathematical treatment with isometry calculation is carried on the obtained data point set [p], a corresponding point set [p1] of the practical surface of the covering is obtained, location optimization is carried out on theoretical covering curved surface, and a digital pairing processing point set [Q] of the surface of a honeycomb sandwich is generated, compensation to the radius of a grinding wheel is carried out, a point set [M] of a movement locus of the centre of the grinding wheel is obtained, the three-axis linkage interpolation method taking C axis of a rotation axis as a benchmark is adopted, and the upper surface and the lower surface of the honeycomb sandwich are respectively ground and processed. The invention realizes integration of measurement, mathematical treatment and digital treatment of the large-sized and irregular revolving molding surface member and has high treatment precision and high treatment efficiency; in addition, the product percent of pass is 100 percent, and the production period is shortened to three days from ten days so as to meet the needs of production.
Owner:DALIAN JIAOTONG UNIVERSITY
Pulse wind tunnel operation control system and pulse wind tunnel operation control method
ActiveCN106840582AEnsure the safety of personnel operationHigh repeatabilityAerodynamic testingAutomatic controlAutomotive engineering
The invention relates to a pulse wind tunnel operation control system and pulse wind tunnel operation control method. The system comprises a PLC module, a driving section inflation valve, a driving section deflation valve, a driving section pressure sensor, a 1 / 2 valve, a double film section deflation valve, a double film section pressure sensor, a driven section inflation valve, a driven section deflation valve, a driven section pressure measuring module, a driven section vacuum pumping valve, a test section deflation valve, a test section vacuum pumping valve, a test section pressure sensor and a vacuum machine tool; the PLC module achieves automatic control in a wind tunnel test process, a distributed control mode is adopted, all operation is completed in a test control room, there is need to enter a field for work, a high pressure air source is isolated, and the personnel operation safety is guaranteed.
Owner:CHINA ACAD OF AEROSPACE AERODYNAMICS
Exercise index measurement insole and data processing method corresponding to same
InactiveCN103349395AAccurate responsePrecise Motion Index ParametersInsolesNavigation instrumentsMicrocontrollerData acquisition
The invention discloses an exercise index measurement insole and a data processing method corresponding to the same. The motion index measurement insole comprises a piezoelectric sensor, a master chip and a power supply unit, wherein the master chip comprises a three-axis acceleration sensor, a single chip and a Bluetooth transmitting module; the piezoelectric sensor is arranged at the front sole part of the insole, and the master chip is arranged in the middle of the insole; and the power supply unit provides power for the master chip, output ends of the piezoelectric sensor and the three-axis acceleration sensor are connected with an input end of the single chip respectively, and an output end of the single chip is connected with the Bluetooth transmitting module. The exercise index measurement insole disclosed by the invention has high data acquisition accuracy, meanwhile, acceleration and pressure detection data are acquired, and each motion index parameter of a human body can be accurately reflected; the working modes are various, and index measurement modes of various exercises such as running, basketball playing, football playing, rope skipping, walking and the like are provided specifically; and the structure is simple, the cost is low, the use is convenient, and the product is invisible.
Owner:赵聪
Method for counting passenger flow at airport security check counter
InactiveCN105893962AWill not blockNo occlusionImage enhancementImage analysisFrame differencePattern recognition
The invention discloses a method for counting passenger flow at an airport security check counter. The method comprises steps of: converting an image in a video sequence into a grayscale image, extracting a foreground image by a frame difference method and binaryzing the foreground image; extracting a head part from the foreground image by using a head grayscale characteristic and connected domain detection algorithm; in a head tracking and counting algorithm, tracking and counting head characteristics by using the specificity of the head connected domain in videos and a container; and counting the number of people by using the tracking of the head characteristics. The method may automatically count the passenger flow at a place, and can be used at other fixed places similar to the airports and with dense people flow, such as railway stations, bus stations, and tourist resorts.
Owner:CHENGDU UNIV OF INFORMATION TECH +2
High-precision overhead transmission conductor sag detection method
ActiveCN111121645AAvoiding Mis-Aim SituationsEasy way to work in the fieldUsing optical meansPoint cloudConductor sag
The invention discloses a high-precision overhead transmission conductor sag detection method, and relates to the technical field of metering length, width or thickness by metering equipment characterized by adopting an optical method. The method comprises the following steps: acquiring conductor point cloud data of different instantaneous points of one overhead transmission conductor in a measurement period; performing data processing on the wire point cloud data, establishing a wire coordinate system, and extracting wire feature point data; establishing a catenary equation of the overhead transmission conductor and a sag equation of the overhead transmission conductor based on the conductor coordinate system; and fitting and solving a catenary equation of the overhead transmission line and a sag equation of the overhead transmission line by adopting a nonlinear least square method based on the line feature point data. The method is high in precision, and can calculate the conductor sag at any position.
Owner:内蒙古蒙能建设工程监理有限责任公司
Programmable power supply system dedicated for chip electrophoresis
InactiveCN101236175ARealize electrophoresis experimentsGood reproducibilityMaterial analysis by electric/magnetic meansApparatus with intermediate ac conversionMicrocontrollerHuman–machine interface
The invention relates to a chip electrophoresis special programmable power supply system, which belongs to the electronic information technical field. The invention solves the problem that the prior power supply control system fails to simultaneously have the functions of a wide voltage range, a lower current density, multiple outputs, etc. The invention which adopts a twin-CPU programmable power supply structure consists of an upper PC machine, a monitoring human-machine interface connected with the upper PC machine, a lower MCU, multiple D / A switching circuits connected with the lower MCU, a power supply module respectively connected with the D / A switching circuits, an A / D switching circuit connected with the lower MCU, and a serial communication circuit arranged between the two CPUs of the upper and lower machines. The chip electrophoresis special programmable power supply system is characterized in the program control of multiple DC voltage outputs, the high accuracy of voltage control and data acquisition, high stability, multiple chip electrophoresis program control modes, real-time display of testing curves, data and curves storage, data inquiry, etc. The programmable power supply system is applicable to a plurality of operational modes in single-dimensional and multi-dimensional, etc. of chip electrophoresis and has applications in biochemical analysis based on electrophoresis separation, etc.
Owner:YANGZHOU UNIV
Full-automatic material taking control system of bucket wheel machine
PendingCN111634636AImprove working environmentReduce labor costsControl devices for conveyorsLoading/unloadingReclaimerServer
The invention provides a full-automatic material taking control system of a bucket wheel machine. An equipment end and a control chamber end are included. The equipment end mainly comprises image point cloud data collection equipment, material taking machine posture collecting equipment and a material taking machine PLC control system. The control chamber end mainly comprises an image processing server, a strategy executing server and a center control chamber PLC control system. By means of the full-automatic material taking control system, the work environment of operators of the bucket wheelmaterial taking machine is improved, the labor cost is greatly reduced, and the production efficiency is improved. In addition, by application of the full-automatic material taking control system, the material taking operation process and operation are better standardized, and the service life of the material taking machine is prolonged.
Owner:DALIAN HUARUI HEAVY IND GRP CO LTD
Method and device for collecting adhering/non-adhering microscopic behaviors of bioadhesion animal and mechanics data
InactiveCN103584837AEfficient collectionRealize acquisitionDiagnostic recording/measuringSensorsEngineeringRepeatability
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Cover plate type fiber bragg grating sensor and packaging method thereof
InactiveCN102980684AImprove firmnessHigh data acquisition accuracyThermometer detailsThermometers using physical/chemical changesFiberGrating
The invention discloses a cover plate type fiber bragg grating sensor and a packaging method thereof. The cover plate type fiber bragg grating sensor comprises a grating and a protection sleeve, wherein a wire jumper and tensile fibers are fixed in the protection sleeve. One end of the protection sleeve is fixedly connected with a flange interface, and the other end of the protection sleeve is fixedly connected with a temperature sensing box. The grating is packaged in the temperature sensing box, the wire jumper and the grating are connected with each other in the temperature sensing box. The packaging method of the cover plate type fiber bragg grating sensor includes preparing the sleeve, painting temperature-resistant AB glue, welding the wire jumper and the grating in fusion mode, leading the wire jumper to penetrate through the protection sleeve, fixing one end of the wire jumper not provided with the grating with the flange interface, arranging the grating at the central position of a sensing protection groove, and buckling a packaging cover plate on the sensing protection groove. Compared with the prior art, the cover plate type fiber bragg grating sensor is good in mechanical performance, sensor performance, insulation performance and firmness, and improves sensor firmness, data collection accuracy and data collection speed. The packaging method of the cover plate type fiber bragg grating sensor greatly improves production efficiency and production survival rate, simultaneously improves sensor firmness and enables the sensor not to split or fall easily.
Owner:YIBIN POWER SUPPLY COMPANY STATE GRID SICHUAN ELECTRIC POWER +1
External parameter calibration method and device and electronic equipment
ActiveCN111383279AHigh data acquisition accuracyImprove efficiencyImage enhancementImage analysisPoint cloudData set
The embodiment of the invention discloses an external parameter calibration method and device and electronic equipment. The method comprises: obtaining image data acquired by a camera device for a target calibration reference object and point cloud data acquired by a radar device for the target calibration reference object, wherein the target calibration reference object comprises a plurality of plane bodies having preset colors and forming preset angles; processing according to the point cloud data, and determining a plurality of point cloud data sets with different specific position features; projecting the point cloud data in the set into an image acquired by the camera device; and determining a calibration result according to the overlapping degree between the point cloud data in the set and the projection result in the image acquired by the camera device. According to the embodiment of the invention, a higher-precision external parameter calibration result can be obtained more simply and conveniently.
Owner:浙江菜鸟供应链管理有限公司
Small pulsed electric field and magnetic field integrated measurement device
ActiveCN103823122AHighly integratedReduce volumeElectromagentic field characteristicsAnti jammingWindow detection
The invention discloses a small pulsed electric field and magnetic field integrated measurement device. The small pulsed electric field and magnetic field integrated measurement device comprises a high-performance composite signal processing single-chip microcomputer collecting system, an electric field antenna, a high-resistance differential amplification circuit, a small loop magnetic field antenna, an integral circuit and a hexahedron metal shielding shell. Electric field signals are collected by an ADC0 module of a single-chip microcomputer. Magnetic field signals are collected by an ADC1 module of the single-chip microcomputer. All the circuits are packaged in the hexahedron metal shielding shell. An ADC0GT register and an ADC0LT register of a single-chip microcomputer chip are installed to start the window detection function of an analog-digital conversion module ADC0 to achieve pretrigger, and random overall pulse waveforms are collected by combining DMA circulating storage data. Data exchange is carried out between a collecting system and the outside through a CAN high-speed transmission interface. At the same measurement point, pulsed electric field waveforms and pulsed magnetic field waveforms can be measured at the same time in the measurement process at one time. The device is low in cost, high in work efficiency and strong in anti-jamming capability.
Owner:PLA UNIV OF SCI & TECH
Forest resource value check computation space informationization technology and method
InactiveCN101196931AAcquisition period is shortAutomatic acquisitionSpecial data processing applicationsInformatizationData acquisition
The invention discloses a forest resource value accounting space informationization technology method, which takes spatial data and attribute data of a forest resource second-class investigation as the basis, carries out land classification on satellite remote sensing image according to an expert knowledge database, acquires the areas of woodland, marsh, sand and ground, establishes a forest resource value accounting space database, performs system sampling based on Nkm multiplying Nkm grid, acquires the gray-scale value of the remote sensing image of each sampling point dropping on the woodland, inverts the forest reserves and finishes forest resource value accounting space informationization. The invention improves the data acquisition precision, shortens data acquisition period, timely and precisely provides with forest resource spatial information and realizes the value accounting of woodland, stumpage and amount of stumpage growth.
Owner:BEIJING FORESTRY UNIVERSITY
Generator stator bar hot water flow experiment simulation device and experimental method
ActiveCN106500996AEasy to operateThe experimental operation is simple and convenientEngine testingExperimental methodsWater flow
The invention discloses a generator stator bar hot water flow experiment simulation device and an experimental method. The generator stator bar hot water flow experiment simulation device comprises a stator bar, a hot water loop, a cold water loop, temperature measuring elements and a data acquisition device, wherein a water inlet end of the stator bar is connected with water outlets of the hot water loop and the cold water loop, a water outlet pipeline of the stator bar is connected with a main loop water pump, and the main loop water pump is connected water inlets of the hot water loop and the cold water loop; the water inlet end of the stator bar is provided with a flowmeter, the water inlet ends and the water outlet ends of the hot water loop, the cold water loop and the stator bar are provided with the temperature measuring elements, and the data acquisition device acquires test values of all the temperature measuring elements and the flowmeter. The generator stator bar hot water flow experiment simulation device simulates the field test completely, operates all the test processes in situ, is simple, convenient, real-time and efficient, and is of very important significance to the intensive study of test factors such as flow, environment temperature and temperature difference on test effects and stability and the formation of scientific and practical test system and criteria.
Owner:ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +2
Programmable power supply system dedicated for nano processing
InactiveCN101145050AGood reproducibilityIncrease powerTotal factory controlProgramme total factory controlMicrocontrollerData acquisition
The present invention relates to a program-controlled power system specially used in nanometer-processing, and belongs to the field of electronic technology. The present invention adopts dual-CPU program-controlled power structure, and mainly consists of an upper personal computer, a lower single chip computer, a multi-way DC power controlled by the single chip computer, a detector for output voltage and current as well as a serial communication circuit arranged between the upper and lower computers and the dual-CPU; under the support of the program-controlled software specially used in nano-processing, the present invention has the advantages that with high power, high precision of the voltage control and data collection, good stability as well as a plurality of modes of voltage control, the present invention can control the voltage output of the multi-way DC by a program, and can real-time show the testing curve, save the data and curve and check the data; the program-controlled power system is applicable to the processing of materials such as the nanometer tube array of anodic aluminum oxide or can be a template to prepare other metals and non-metallic nanometer tubes; the present invention also can be applicable to other nanometer-research and the preparation of oxide nanometer material as well as biochemical analysis.
Owner:YANGZHOU UNIV
Alternating current signal collection and automatic calibration method
ActiveCN105301402AHigh data acquisition accuracyAvoid Phase and Amplitude DeviationsElectrical testingPhysicsMeasurement precision
The invention relates to an alternating current signal collection and automatic calibration method. Firstly, a CPLD is utilized for receiving square wave signals generated by collection and shaping of an alternating current collection module hardware frequency measurement loop, the CPLD carries out frequency tracking and calculation on the square wave signals, equally-spaced N pulse signals are output to a DSP in each period according to a measured frequency value, the frequency value is sent to the DSP, and the DSP completes N-point alternating current signal collection of each cycle; then the DSP uses pulse signals received from the CPLD as starting references of alternating current signal collection, the collection of all channel alternating current signals is finished in T / N, and N-point sampling of each alternating current signal is finished in the period T; and finally, automatic calibration is carried out on the collected alternating current signals. The method provided by the invention has the advantages that the collection capacity is large, the remote measurement precision is high, the calibration method is simple, and the expandability and the easy maintenance of the product are greatly improved.
Owner:INTEGRATED ELECTRONICS SYST LAB
Closed type cable state online monitoring method based on RFID
InactiveCN103344282AHigh data acquisition accuracyGood data securityMeasurement devicesCircuit arrangementsRadio frequencyData transmission
The invention relates to a closed type cable state online monitoring method based on RFID. The closed type cable state online monitoring method based on the RFID comprises the following steps that (1) data of a sensor installed on a cable device are read in real time by an on-site data collecting unit through an RFID card reader, local storage is conducted on the data, whether the data exceed a set threshold value or not is judged, if the answer is positive, the collected data and alarm information are transmitted to a region data concentrator through a wireless radio-frequency network, and if the answer is negative, only the collected data are transmitted to the region data concentrator; (2) local storage is conducted on the received data and the received alarm information by the region data concentrator and after encryption and coding are conducted on the received data and the received alarm information, the data and the alarm information are transmitted to a back-stage management server through a mobile communication network; (3) decryption and decoding are conducted on the received data and the received alarm information by the back-stage management server, local storage is conducted, and the alarm information is sent to a user terminal in real time. Compared with the prior art, the closed type cable state online monitoring method based on the RFID has the advantages of being high in monitoring accuracy, good in data safety and the like.
Owner:STATE GRID CORP OF CHINA +1
Agricultural product soil environment monitoring system based on Internet of Things
InactiveCN110763824ASolve pollutionIncrease coverageTransmission systemsEarth material testingMonitoring siteAgricultural science
The invention provides an agricultural product soil environment monitoring system based on an Internet of Things. The system comprises a soil collection module, a soil monitoring module, a wireless transmission module, a control processing module and an alarm module, wherein the soil collection module comprises multiple soil mass collection units, and each soil mass collection unit is provided with multiple sensors; the soil monitoring module comprises a monitoring point distribution unit and a monitoring point monitoring unit, wherein the monitoring point monitoring unit is used for performing analytical detection on to-be-detected soil conveyed by the soil collection module, and detection information is sent to the control processing module through the wireless transmission module; the control processing module comprises a preprocessing unit, a detection comparison unit and a processing unit; and the alarm module sends out a red alarm when soil environment monitoring data is greaterthan a set safety threshold. Through the system, real-time and effective monitoring on a soil environment is realized.
Owner:徐州斯塬网络科技有限公司
High-precision map making method and system using millimeter wave radar
ActiveCN110660218ATimely updateHigh data acquisition accuracyDetection of traffic movementVehicle position indicationData acquisitionEngineering
The invention relates to a high-precision map making method and system using a millimeter wave radar, and belongs to the technical field of radar. The method comprises the following steps of acquiringroad information by using the millimeter wave radar in a process of enabling a vehicle provided with the millimeter wave radar to pass through a road section; identifying road characteristics; and generating a high-precision map according to the road information, the road characteristics and vehicle information. The method has low hardware cost, low false alarm rate, high data acquisition precision, many identifiable objects and low environmental requirements and can cope with the severe weather and scenes with the low visibility and the like; and furthermore, through a crowdsourcing way, thevehicles provided with the millimeter wave radars pass through the same road section or pass through the same road section for multiple times to acquire the road information for many time, so that amillimeter wave radar high-precision map layer is formed, the map is timely updated, and thus the generated high-precision map meets the requirement for automatic driving to be beneficial to large-scale commercial use.
Owner:上海莫吉娜智能信息科技有限公司
Testing apparatus and method for testing torsional rigidity of radial section of piston ring
ActiveCN107677558AImproved Torque AccuracyEasy to fixMaterial strength using steady torsional forcesPiston ringMechanical engineering
The invention specifically provides a testing apparatus for testing the torsional rigidity of the radial section of a piston ring, belonging to the field of power machinery. The testing apparatus comprises the piston ring, a base, a pressing body, a force sensor, a loading handle, a leveling swing rod, a plumb, a displacement measuring swing rod, a first displacement sensor and a second displacement sensor, wherein a groove is arranged on the base, and a central column is arranged at the center of the groove on the base; the loading handle, the force sensor and the pressing body are sequentially arranged on the central column from top to bottom; the piston ring is arranged between the side surface of the pressing body and the inner wall of the groove on the base; the circumferential section of the piston ring is perpendicular to the central column; the top of the base is provided with a connecting rod which is provided with the leveling swing rod and the displacement measuring swing rod; the first displacement sensor is installed between the displacement measurement swing rod and the upper surface of the pressing body; and the second displacement sensor is installed between the side surface of the pressing body and the inner wall of the groove on the base. According to the invention, the radial section deformation of the piston ring is taken into consideration, so the precisionof torque determination of the piston ring is high, and accurate torsional rigidity of the radial section of the piston ring can be obtained.
Owner:HARBIN ENG UNIV
Farmland environment monitoring system with high accuracy and low cost
InactiveCN108259597AHigh degree of automationHigh data acquisition accuracyMeasurement devicesNetwork topologiesWireless mesh networkWireless sensor networking
The invention discloses a farmland environment monitoring system with high accuracy and low cost. The system comprises a soil detection module, a wireless communication module and a remote terminal, wherein the soil detection module is composed of sensor nodes and used for collecting parameter indexes reflecting farmland environment condition, and transmitting the collected index data to the wireless communication module via a wireless sensor network; the wireless communication module is used for transmitting the received index data to the remote terminal; the remote terminal is used for storing and displaying the received index data, and giving an alarm when the index data is lower than a security threshold. The system provided by the invention has the beneficial effects that the farmlandenvironment monitoring system based on the wireless sensor is provided, the farmland environment parameter index can be remotely monitored in real time, and the degree of automation and data collection accuracy in farmland monitoring are improved.
Owner:广州森阳环保技术有限公司
Automatic tracking type solar scattered radiation measuring instrument and measuring method
ActiveCN112050934AReduce shading areaReduce areaSatellite radio beaconingPhotometry for measuring solar lightElevation angleOptical tracking
The invention relates to an automatic tracking type solar scattered radiation measuring instrument and a measuring method. The device comprises a solar scattered radiation measuring device, a controller and an upper computer, the solar scattered radiation measuring device is in wireless connection with the controller, and the controller is in wireless connection with the upper computer. The longitude and latitude of a measurement site, the local time and the initial placement orientation of the automatic tracking type solar scattered radiation measurement instrument are obtained through the Beidou positioning time service module of the controller, and the declination angle, the elevation angle and the azimuth angle of the sun are calculated through the geometrical optics principle of the sun; the declination angle, the elevation angle and the azimuth angle of the sun at each moment when the number of days is n are used for controlling the solar scattered radiation measuring device to track the sun for position change, the solar scattered radiation measuring device obtains radiation voltage, and a solar scattered radiation value is calculated through the controller and transmitted to the upper computer for display and data storage. The solar scattered radiation measuring device can accurately and automatically operate, and an expensive optical tracking device is not needed.
Owner:KUNMING UNIV OF SCI & TECH
System and method for synchronously measuring spraying macromorphology and microscope properties
InactiveCN105628566APrecise control of thermodynamic parametersChange structure layout designParticle size analysisCombustionEngineering
The invention discloses a system and method for synchronously measuring spraying macromorphology and microscope properties. The system comprises a constant-volume combustion device, a fuel supply system, an LED (light emitting diode) lamp, a high-speed camera, a digital delay generator and a phase Doppler particle analyzer, wherein the fuel supply system is provided with a controller; the constant-volume combustion device consists of a box body and a combustion projectile body; the combustion projectile body is provided with four observation holes in the shape like a through hole; the axial lines of the observation holes are on the same horizontal plane; the angle between the axial lines of the two observation holes is 180 degrees; the included angle between the axial lines of the other two observation holes is 160 degrees; an optical observation window is arranged in each observation hole; the constant-volume combustion device is communicated with the fuel supply system; the controller is connected with the digital delay generator; the digital delay generator is connected with the phase Doppler particle analyzer and the high-speed camera. By the measuring method using the measuring system, the goal of synchronously measuring the spraying macromorphology and the microscope properties in the constant-volume combustion device is realized.
Owner:TIANJIN UNIV
Drop prevention system based on lower limb exoskeleton robots
The invention relates to a drop prevention system based on lower limb exoskeleton robots. The drop prevention system comprises the lower limb exoskeleton robots, a wide-plain-strip elastic band and amain control box, wherein the main control box is arranged at the upper side of the wide-plain-strip elastic band; the main control box comprises a power supply module, a gravity center acquisition module and a data analysis module; the gravity center acquisition module and the data analysis module are integrated on a bottom plate, and the bottom plate is composed of various small components; thewide-plain-strip elastic band is internally provided with a vibrator; the number of the lower limb exoskeleton robots is two, and the lower limb exoskeleton robots are arranged at the two sides of thewide-plain-strip elastic band respectively. The drop prevention system has high adaptability, can be adapted to all lower limb exoskeleton robots such as walking aid exoskeleton robots or assisting exoskeleton robots, and various functions can be added according to the requirements of a wearer, and the expansibility is high.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Data collection circuit with dual threshold voltage
InactiveCN101150320ANovel structureHigh data acquisition accuracyElectric signal transmission systemsAnalogue-digital convertersAudio power amplifierData acquisition
This invention relates to a data collecting circuit, in which, an output end of a sample keeping circuit is connected with the input of a cascade program control amplifier, the other output is connected with the input of a pre-sampling circuit, the output of the cascade program control amplifier is connected with the input of a tail code converting circuit, the output of the pre-sampling circuit is connected with a coding circuit, after the sample keeping circuit collects analog voltage signals, it transfers them to the cascade program control amplifier and the pre-sample circuit, which first of all carries out A / D conversion to the analog voltage signals and then transfers them to the coding circuit to control the amplified multiple of the amplifier, which amplifies the analog signals according to the amplification multiple then to deliver them to the tail code conversion circuit to carry out accurate A / D conversion to it synchronously.
Owner:无锡矽太恒科电子有限公司
Electronic system, signal processing method thereof and single photon emission computerized tomography imaging equipment
ActiveCN104814756AEasy to adjustHigh digital integrationComputerised tomographsTomographySingle photon emission computerized tomographyImaging equipment
The invention discloses a signal processing method of an electronic system for single photon emission computerized tomography imaging. A multi-channel, independent trigger and fully digital electronic scheme is adopted by the method. The signal processing method comprises a multi-channel independent and parallel analog acqusition scheme and a high-integration digital processing scheme. The method specifically comprises the following steps: amplifying and forming a weak signal; performing multi-channel parallel collection; performing digital preprocessing on an analog signal, performing analog-digital conversion, series-parallel conversion, mutually independent trigger signal generation, baseline and gain adjustment and digital processing and transmission. The system realizes a multi-channel analog signal, high-speed, high-quality parallel acqusition scheme. The signal processing method is characterized in that fully parallel processing is performed, the acqusition accuracy is high, the digital processing method is flexible, the speed is high, the configuration parameter is easy to adjust, the upgrading is easy and the like. The invention also discloses the electronic system for the single photon emission computerized tomography imaging and single photon emission computerized tomography imaging equipment.
Owner:BEIJING NOVEL MEDICAL EQUIP LTD
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Owner:SHANGHAI JIAO TONG UNIV
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