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32results about How to "Strong measurement accuracy" patented technology
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Remote wireless environment real-time data acquisition method and device
InactiveCN101620771AReduce power consumptionReduced storage capacity requirementsTransmission systemsNetwork topologiesReal time acquisitionZigbee wireless sensor networks
The invention relates to an environmental monitoring system, in particular to a remote wireless environment real-time data acquisition method and a device. The device comprises a management work station and at least one ZigBee wireless sensor network, wherein, the wireless sensor network comprises a coordinator node which is connected with at least one router node; the router node is connected with at least one functional module, and the coordinator node is connected with the management work station by an RS232 interface. The acquisition device in the invention is developed by utilizing an advanced ZigBee wireless sensor network system, has the characteristics of low cost, high reliability, convenience and strong commonality, and can carry out wireless real-time acquisition on outdoor environmental information.
Owner:SHANDONG JIANZHU UNIV
A segmented trace hinge moment balance
InactiveCN104990683AImprove securityLarge scale coverageAerodynamic testingMeasurement testImage resolution
The invention provides a segmented trace hinge moment balance and belongs to the technical field of aerospace force measurement test aerodynamic force measurement. The segmented trace hinge moment balance is of an all-steel-component combined structure. The segmented trace hinge moment balance comprises a measuring device, a thermal insulation device and a limiting protection device. The measuring device comprises a simple-component balance and a six-component beam balance, wherein the central axis of the simple-component balance is perpendicular to the central axis of the six-component beam balance; the simple-component balance is fixed at the free end of the six-component beam balance and is used for measuring a trace hinge moment, and the six-component beam balance measures all the aerodynamic force borne by a control surface and thus corrects the disturbance from the rest of aerodynamic force to the trace hinge moment, so that the resolution ratio and the accuracy of measurement can be improved. The thermal insulation device is arranged on the outer side of the measuring device, so that the heat protection performance and the thermal insulation performance of the measuring device are improved, the temperature effect is reduced, and the accuracy of trace hinge moment measurement in wind tunnel tests under the condition of a high Mach number is improved.
Owner:INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
FBG sensor sensitivity improving method based on cantilever structure
ActiveCN105571619AIncrease the amount of strain changeImprove sensor sensitivityConverting sensor output opticallyInterference resistancePunching
The invention provides an FBG sensor sensitivity improving method based on a cantilever structure. The method comprises the steps of: forming a through hole in a suitable position of the cantilever; determining the maximum part of two positive strains and the maximum part of two negative strains of the cantilever at present; bonding one FBG to the maximum part of two positive strains and the maximum part of two negative strains of the cantilever respectively; and superposing spectrums of the two FBGs and utilizing an FBG spectrum broadening effect to carry out sensing demodulation on the two FBGs. According to the invention, a simple punching method is utilized to add strain changes, and the ingenious design of the bonding positions of the FBGs and the suitable demodulation mode are adopted, so that the sensing sensitivity is improved, and temperature self-compensation and multi-parameter sensing measurement are realized; in addition, the FBG sensor sensitivity improving method has the advantages that the interference resistance is high, the long-term drifting is small, the measuring precision is high, and flow measurement under severe industrial environments such as high temperature, high pressure and high electromagnetic interference can be realized.
Owner:ANHUI CASZT PHOTOELECTRIC MEASUREMENT & CONTROL TECH CO LTD
Magnetostrictive/resonator series connection composite resonant magnetic sensor
InactiveCN109521377ASimple structureImprove stabilityMagnetic field measurement using galvano-magnetic devicesTuning forkResonance
The invention discloses a magnetostrictive / resonator series connection composite resonant magnetic sensor and belongs to the magnetic sensor field. The sensor comprises two magnetostrictive plates, atuning fork resonator, a fixed support structure, an oscillating circuit and a frequency detecting unit. The two ends of the tuning fork resonator are connected to one ends of the corresponding magnetostrictive plates. The tuning fork resonator and the magnetostrictive plates are fixed in the fixed support structure. The tuning fork resonator and the oscillating circuit are connected to form an oscillating circuit loop. The oscillating circuit carries out self-oscillation and outputs an oscillating signal according to the resonant frequency of the tuning fork resonator, and the tuning fork resonator generates resonance according to the oscillating signal. The frequency detecting unit is used for detecting the resonant frequency of the tuning fork resonator. By using the magnetostrictive / resonator series connection composite resonant magnetic sensor, through increasing the length of the magnetostrictive plates, large telescopic deformation is generated so as to improve sensitivity.
Owner:NANJING UNIV OF SCI & TECH
Method and device for tracking sun by solar panel
InactiveCN102749935ASpectrum range response is obviousLow priceControl using feedbackVertical planeGround plane
The invention discloses a method and a device for tracking the sun by a solar panel. The method comprises the following steps of: 1) determining an optimal placing dip angle of a light intensity sensor used for testing, arraning the light intensity sensor on a test plate, rotating the light intensity sensor used for testing for 180 degrees in an east-west vertical plane or a south-north vertical plane by starting from the fact that the test plate is vertical to the ground plane on the test plate, recording a light intensity value and a corresponding angle value in the rotating process, making a difference between the light intensity values of adjacent items to obtain a point with the maximum difference value, taking the point as a jump point of the light intensity, taking an angle corresponding to the jump point as an optimal placing dip angle of the light intensity sensor used for testing, and according to the optimal placing dip angle, fixing the light intensity sensor used for testing; and 2) on the basis of the light intensity sensor used for testing, which is arranged on a surface plate, executing an automatic light following step, and regulating the dip angle of the surface plate to enable the surface plate to track the sun in real time. The method and the device for tracking the sun by the solar panel have the advantages of high precision and easiness in implementation.
Owner:CENT SOUTH UNIV
Method for measuring topological charges of optical vortex
The invention discloses a method for measuring topological charges of an optical vortex. The existing technical method has the disadvantages that the method is complex, the measuring sensitivity is low and is apt to be interfered with and the data processing is complex. The method uses the focusing property of a Lorentz Gaussian beam containing the optical vortex to realize the measurement of the topological charges of the optical vortex. Specifically, the Lorentz Gaussian beam is introduced into the detected optical vortex by using a phase modulation device, then the Lorentz Gaussian beam containing the optical vortex is focused through a converging element, a light intensity distribution curve in a direction perpendicular to an incident beam polarization phase on a focal plane is detected through linear array photoelectric sensors, the valley number of the light intensity distribution curve is the topological charges of the optical vortex, and the decimal fraction of peak ratio of an asymmetrical light intensity distribution curve is an integer-removed remainder of fraction topological charges. Therefore, the measuring method provided by the invention has the characteristics of simplicity, convenience in realization, high interference resistance, high measuring accuracy, simple data processing and the like.
Owner:量敏传感技术(上海)有限公司
Absolute linear displacement sensor based on decimal shift coding
ActiveCN109724519AImprove anti-interference abilityEasy to processUsing optical meansPhotovoltaic detectorsSignal processing circuits
The invention discloses an absolute linear displacement sensor based on decimal shift coding. The absolute linear displacement sensor based on decimal shift coding comprises a light emitting component, a movable ruler base, a fixed ruler base, a photoelectric detector and a signal processing circuit; an absolute code channel and an incremental code channel are on the movable ruler base; decimal shift codes are engraved on the absolute code channel; uniformly distributed rectangular light transmission surfaces I are engraved on the incremental code channel; light emitted by the light emitting component can form a light intensity alternative illumination area acting on the absolute code channel and the incremental code channel; a long strip-shaped light transmission surface and four sets oflight transmission surfaces are on the fixed ruler base, and arranged according to a specific space position; after an electric signal reflecting the absolute position output by the photoelectric measuring head of the photoelectric detector is processed, an absolute position value is obtained; after four light current signals reflecting incremental displacement are processed, an incremental displacement value is obtained; and the absolute position value is added with the incremental displacement value, so that an absolute linear displacement value is obtained. According to the absolute lineardisplacement sensor based on decimal shift coding disclosed by the invention, the absolute linear displacement can be precisely measured; the graph coding difficulty can be reduced; and the measurement reliability can be improved.
Owner:CHONGQING UNIV OF TECH
Random code external modulation distributive-type optical-fiber sensing method and device
A random code external modulation distributive-type optical-fiber sensing method comprises the following steps of dividing a beam of continuous laser with the linear width being smaller than or equal to 100kHz into two paths of light after being externally modulated to be random-code laser, wherein one path of the light is used as reference light, and the other path is used as detection light to be transmitted to a sensing optical fiber; and adopting a correlation method to process Brillouin scattered light and reference light, which are scattered backwards by the sensing optical fiber, after being converted to an electric signal, and acquiring the information containing the temperature variation and stress distribution in the optical fiber to be measured. A random code external modulation distributive-type optical-fiber sensing device comprises a laser transmitting device, and a light splitting device, a detection optical fiber device, a photoelectric conversion device and a signal collection processing display device, which are arranged on a light emitting path of the laser transmitting device. Due to the adoption of the random code external modulation distributive-type optical-fiber sensing method and device, contradiction among the positioning precision, temperature and stress measuring precision of the existing distributive-type optical-fiber sensor can be solved, and long-distance and high-resolution temperature and stress measurement can be realized.
Owner:TAIYUAN UNIV OF TECH
Cluster large-scale three-dimensional flow field and hydrodynamic force synchronous measurement system and test method
InactiveCN113804398ASimple structureImprove reliabilityHydrodynamic testingFlapping wingClassical mechanics
The invention relates to a cluster large-scale three-dimensional flow field and hydrodynamic force synchronous measurement system and a test method. The system comprises a fixed support, a six-dimensional force / moment balance, a circulating water tank, four high-speed cameras, a rear observation camera, an LED / laser high-intensity body light source, and the like. Key parameters reflecting the performance of an underwater vehicle, such as the energy utilization rate, the torque coefficient and the thrust coefficient of a bionic underwater vehicle in a cluster working mode, three-dimensional flow field characteristics in the cluster working mode, and motion characteristics, spanwise deformation, waveforms and the like of flapping wings of the vehicle in the experiment process can be measured at the same time, and the cluster formation is variable. The measurement system is simple in structure, high in reliability, high in measuring precision and flexible in measuring form. The test result is closer to the real situation of a bionic aircraft cluster operation mode, and effective reference and more accurate and more comprehensive data support can be provided for design of bionic aircraft engineering prototypes operating in a cluster mode.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Sugar cane crystallization supersaturation microwave induction on-line detection method and detector
InactiveCN101059453AEasy to useCompact useMaterial analysis using microwave meansCapacitanceDisplay device
The invention relates to a microwave sensitive online detect method and a relative detector on the cane juice crystallization super-saturation degree. The invention uses a cane juice saturation sensitive inductance winding in 8-shape or dual-6 shape to connect a microwave signal excite circuit, wherein the winding can change resistance along with the capacitor and inductance change of around medium, to change the microwave frequency generated by the microwave signal excite circuit. The excite circuit is compacted with the outer wall of a boiling pan, to check the change of microwave frequency, to obtain the super-saturation of cane juice. The detector comprises a microwave signal excite circuit, a microwave frequency check and voltage convert circuit, a microprocessor, a power supply and a display. The microprocessor stores the relation between the microwave frequency electric parameter signal and cane juice crystallization saturation, to directly output the cane juice crystallization super saturation degree according to the microwave frequency. The inventive method and the detector can non-contact detect the cane juice un-saturation degree in the boiling pan, with simple application, strong interference resistance, high measurement accuracy and wide measuring range.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Pipe check platform instrument
ActiveCN105136032AReduce production errorsImprove working environmentUsing optical meansMeasurement deviceEngineering
The invention discloses a pipe check platform instrument, characterized by comprising a fixed mounting platform and a plurality of measurement mechanisms. The fixed mounting platform comprises a horizontal reference plate with an X graduation line and a Y graduation line, and a vertical reference plate perpendicular to the horizontal reference plate; the vertical plate is provided with connection apertures used for fixing installation flanges of a detected pipe. Each measurement mechanism comprises a scale column, and a base capable of being fixed to the horizontal reference plate; the base is provided with a panel; the scale column is provided with an infrared ray projector capable of sliding up and down along the scale column; the lower end of the scale column is fixedly provided with a rotary angle disc; the rotary angle disc is in connection with the panel, and can rotate relative to the panel.
Owner:GUANGXIN SHIPBUILDING & HEAVY IND
Ultrasonic transducer and nested structure thereof
ActiveCN111473839AShort cycleFast decayMechanical vibrations separationMachines/enginesUltrasonic sensorSound energy
The invention belongs to an electricity and sound energy conversion structure, and particularly belongs to an ultrasonic transducer and a nested structure thereof. The nested structure comprises a first filling body mounted at the bottom of a shell; a first functional body is mounted at the top of the first filling body; a second filling body protruding upwards is arranged in the middle of the upper surface of the first functional body, and a second functional body is arranged at the top of the second filling body; and the first functional body is made of a low-frequency ultrasonic emission material, and the second functional body is made of a high-frequency ultrasonic emission material, wherein the sectional area of the second functional body is smaller than that of the second filling body; and the sectional area of the first functional body is smaller than that of the first filling body. The thickness of the first filling body in the central circular area of the nested structure is small, and the thickness of the second filling body in the peripheral circular area is large; and the first filling body uses a high-frequency transceiving piezoelectric sheet as an excitation element,and the second filling body uses a low-frequency piezoelectric wafer or piezoelectric ring as an excitation element, so that double-frequency-point work is realized.
Owner:CETC CHIPS TECH GRP CO LTD
Testing method for viscosity of organic carrier for photovoltaic front silver paste
The invention discloses a method for testing the viscosity of an organic carrier for photovoltaic positive silver paste. The steps of the test method are as follows: a. First, fill a measuring cup with 15ml-25ml of organic carrier; b. Put the measuring cup into the rotating speed Centrifuge in a centrifuge at 400rad / min~800rad / min for 3min~5min until the foaming is completely removed; c. Increase or decrease the organic carrier in the measuring cup after centrifugation to the specified capacity; d. Put the measuring cup with the specified capacity The cup is fixed in a small sample adapter with constant temperature circulating water and kept warm for 10min to 25min; e. After the viscometer is zeroed, the organic carrier after heat preservation is tested, and the viscosity value of the organic carrier at the specified speed can be read. The test method of the invention can quickly and thoroughly remove the randomly generated air bubbles in the organic carrier, improve the accuracy of the viscosity test, and improve the production efficiency and product quality stability of the photovoltaic positive silver paste.
Owner:DK ELECTRONICS MATERIALS INC
Electric energy metering method
InactiveCN105954577AStrong measurement accuracySave resourcesElectrical measurementsConvertersSquare waveform
The invention provides an electric energy metering method which relates to the field of electric energy metering. The invention solves the problem that unstable distortion signals among power grid signals make the measurement of electric energy inaccurate. Two standard sinusoidal signals are inputted to the shaping signal input end of a shaping circuit and the input end of a multiplication type D / A converter respectively; the shaping circuit outputs a square wave signal, and the square wave signal is added to the input end of a phase locked loop (PLL) circuit; and through the PLL circuit, the signal is transmitted to a frequency divider circuit, and then to an ROM memory, so as to realize that the phase locked loop circuit controls the ROM memory to send a digital signal. Another standard sinusoidal signal and the digital signal undergo mixed analog and digital multiplication in the multiplication-type D / A converter to form a distortion signal; and an ARM controller controls a DSP to carry out wavelet analysis, reconstruction and calculation on the distorted signal. According to specific situations, the distorted power grid signal is decomposed into different frequency bands for electric energy measurement. The method is used for electric energy metering.
Owner:国网黑龙江省电力有限公司佳木斯供电公司 +2
Rapid test device and method for weak optical signal spectrum
The invention provides a weak light signal spectrum fast measuring device and method. On the basis of a light source spectrum power distribution test method of a light splitting type spectrum measurement system, a face array CCD (charge coupled device) is adopted for replacing an original line array CCD, tiny light signals can simultaneously complete multiple times of measurement, the intensity of output signals can be improved through the processing on measuring results, meanwhile, the random noise is eliminated, and the fast measurement of the tiny light signal spectrum power distribution is realized. The weak light signal spectrum fast measuring method has the advantages that the measurement speed is high, the precision is high, the operation is simple, the universality is high, and the technical support is provided for the spectrum test of other kinds of spectrum instruments.
Owner:西安应用光学研究所
Steel wire rope tension monitoring and alarming device
PendingCN112284598AAvoid dangerous accidentsReduce torqueAlarmsTension measurementControl theoryForce sensor
The invention belongs to the technical field of steel wire rope tension monitoring, particularly relates to a traction steel wire rope tension monitoring and alarming device in overhead power transmission engineering, and solves technical problems in the background art. The device comprises a support plate. An end baffle is fixed on the support plate; a bearing seat is fixed on the support plate below the end baffle, a connecting shaft is matched in the bearing seat through a linear bearing, a pressure sensor is arranged between the upper end of the connecting shaft and the lower end of the end baffle, and a movable roller is mounted at the lower end of the connecting shaft; two fixed rollers are fixedly connected to the support plate below the movable roller; and the pressure sensor is connected with an intelligent alarm device in which a pressure threshold value is set. The measurement precision is high. The device is suitable for steel wire ropes with different thicknesses and highin applicability; and the pressure of the steel wire rope can be monitored in real time in the working process of a traction machine, threshold exceeding reminding is achieved in time, and a worker can adjust and replace the steel wire rope in time.
Owner:XINZHOU POWER SUPPLY COMPANY STATE GRID SHANXI ELECTRIC POWER
Measuring device for pressure borne by arc plate type permeable dike in test water tank
PendingCN110389001AImprove performanceEasy to disassembleFluid pressure measurementForce transducersStructure of the EarthEngineering
The invention discloses a measuring device for the pressure borne by an arc plate type permeable dike in a test water tank, and the device is characterized in that the device comprises an upper structure, a permeable dike main body and a lower structure; the upper structure is used for fixing the permeable dike main body from the upper part; the lower structure is used for fixing the permeable dike main body from the lower part; the height of the permeable dike main body is adjustable, so that the changes of the submergence depth and the clearance of the permeable dike main body in a test process can be realized; the permeable dike main body is composed of two same arc plates, two rows of circular point pressure holes are drilled in two sides of the center line in a wave coming direction of each arc plate, and point pressure sensors are installed in the holes and used for measuring point pressure of the upper surfaces and the lower surfaces of the arc plates. The measuring device is simple in structure, easy to operate, high in measurement precision and high in performance.
Owner:LUDONG UNIVERSITY
A fiber-optic ultra-high temperature pressure sensor with temperature compensation function
ActiveCN108896232BEnsure safetyImprove mechanical propertiesFluid pressure measurement using elastically-deformable gaugesLight reflectionFiber type
Provided in the invention is a fiber type ultra-high-temperature pressure sensor with the temperature compensation function. The ultra-high-temperature pressure sensor comprises a sensor chip; a signal output of the sensor chip is connected with a high-temperature-resistant fiber; and the sensor chip is installed in a sensor probe. The high-temperature-resistant fiber passes through a packaging board and a fiber casing tube; the fiber casing tube is connected to the packaging board; and packaging of the sensor chip and the high-temperature-resistant fiber is realized by connection of the packaging board and the sensor probe. The sensor chip consists of a pressure-sensitive film and a sensor chip substrate that are combined by thermocompression bonding. A circular concave cavity is formed in the center of the sensor chip substrate; the front side of the pressure-sensitive film is roughened to form a non-smooth surface; and a light reflection film is formed in an area, facing the circular concave cavity, of the back side of the pressure-sensitive film. According to the invention, the ultra-high-temperature pressure sensor is resistant to the ambient temperature of 1000 DEG C and hasthe temperature compensation function; and the influence on the pressure measurement accuracy by the ambient temperature change can be eliminated effectively. The fiber type ultra-high-temperature pressure sensor has characteristics of small size, good corrosion resistance performance and high precision.
Owner:XI AN JIAOTONG UNIV
A Segmented Micro Hinge Moment Balance
InactiveCN104990683BImprove accuracyImprove reliabilityAerodynamic testingThermal insulationEngineering
The invention discloses a segmented micro-hinge moment balance, which belongs to the technical field of aerodynamic force measurement in aerospace dynamometer tests. The segmented micro-hinge moment balance is an all-steel composite structure, including a measuring device and a heat insulation device , Composed of limit protection devices. The measuring device includes a single-component balance and a six-component rod balance, the central axis of the single-component balance is perpendicular to the central axis of the six-component rod balance, and the single-component balance is fixed at the free end of the six-component rod balance. To measure the tiny hinge moment, use the six-component rod balance to measure all the aerodynamic forces on the rudder surface to correct the interference of other aerodynamic forces on the tiny hinge moment, so as to improve the resolution and accuracy of the measurement. The heat insulation device is arranged outside the measuring device, which enhances the heat-proof and heat-insulating performance of the measuring device, reduces the temperature effect, and improves the measurement accuracy of the micro hinge moment in the wind tunnel test under the condition of high Mach number.
Owner:INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
Distributed optical fiber sensing method and device for random code external modulation
A random code external modulation distributive-type optical-fiber sensing method comprises the following steps of dividing a beam of continuous laser with the linear width being smaller than or equal to 100kHz into two paths of light after being externally modulated to be random-code laser, wherein one path of the light is used as reference light, and the other path is used as detection light to be transmitted to a sensing optical fiber; and adopting a correlation method to process Brillouin scattered light and reference light, which are scattered backwards by the sensing optical fiber, after being converted to an electric signal, and acquiring the information containing the temperature variation and stress distribution in the optical fiber to be measured. A random code external modulation distributive-type optical-fiber sensing device comprises a laser transmitting device, and a light splitting device, a detection optical fiber device, a photoelectric conversion device and a signal collection processing display device, which are arranged on a light emitting path of the laser transmitting device. Due to the adoption of the random code external modulation distributive-type optical-fiber sensing method and device, contradiction among the positioning precision, temperature and stress measuring precision of the existing distributive-type optical-fiber sensor can be solved, and long-distance and high-resolution temperature and stress measurement can be realized.
Owner:TAIYUAN UNIV OF TECH
Sugar cane crystallization supersaturation microwave induction on-line detection method and detector
InactiveCN100578203CEasy to useCompact useMaterial analysis using microwave meansCapacitanceDisplay device
The invention relates to a microwave sensitive online detect method and a relative detector on the cane juice crystallization super-saturation degree. The invention uses a cane juice saturation sensitive inductance winding in 8-shape or dual-6 shape to connect a microwave signal excite circuit, wherein the winding can change resistance along with the capacitor and inductance change of around medium, to change the microwave frequency generated by the microwave signal excite circuit. The excite circuit is compacted with the outer wall of a boiling pan, to check the change of microwave frequency, to obtain the super-saturation of cane juice. The detector comprises a microwave signal excite circuit, a microwave frequency check and voltage convert circuit, a microprocessor, a power supply and a display. The microprocessor stores the relation between the microwave frequency electric parameter signal and cane juice crystallization saturation, to directly output the cane juice crystallization super saturation degree according to the microwave frequency. The inventive method and the detector can non-contact detect the cane juice un-saturation degree in the boiling pan, with simple application, strong interference resistance, high measurement accuracy and wide measuring range.
Owner:GUILIN UNIV OF ELECTRONIC TECH
An Absolute Linear Displacement Sensor Based on Decimal Shift Coding
ActiveCN109724519BImprove anti-interference abilityEasy to processUsing optical meansSignal processing circuitsLight energy
Owner:CHONGQING UNIV OF TECH
A device for measuring liquid sloshing force
ActiveCN111220308BReplaceableWith damping adjustmentHydrodynamic testingVessel designingRotational axisPull force
The invention relates to a device for measuring liquid sloshing force, which belongs to the technical fields of shipbuilding and ocean engineering, and experiment testing. This device for measuring liquid sloshing force includes a force-measuring frame and a liquid cabin mechanism. The force-measuring frame includes a rectangular force-measuring frame mechanism, a pocket frame mechanism, a rotating shaft mechanism and a force-measuring mechanism. The liquid cabin mechanism is placed in the pocket frame mechanism, and the pocket frame The mechanism is connected to the rectangular force-measuring frame mechanism through the rotating shaft mechanism, and the force-measuring mechanism is connected to the rectangular force-measuring frame mechanism and the pocket frame mechanism. The device has the characteristics of light weight, simple structure, convenient combination, convenient operation, high measurement accuracy and strong versatility. This device for measuring liquid sloshing force can be placed on the swaying excitation platform for use. When a certain amount of liquid is filled in the liquid chamber mechanism, the swaying excitation platform shakes, causing the liquid in the liquid chamber mechanism to slosh, and the liquid sloshing force passes through the pocket frame. The mechanism is transmitted to the force measuring mechanism, and the tension meter can measure parameters such as liquid sloshing force.
Owner:DALIAN UNIV OF TECH
Supersonic measuring sensor for water meter, heat meter and flowmeter and using method of sensor
ActiveCN106066197AReduce volumeGood effectVolume/mass flow measurementVolume meteringSWR meterEngineering
Owner:HUIZHONG INSTR
Method and device for tracking sun by solar panel
InactiveCN102749935BStrong measurement accuracyHigh sensitivityControl using feedbackVertical planeEngineering
The invention discloses a method and a device for tracking the sun by a solar panel. The method comprises the following steps of: 1) determining an optimal placing dip angle of a light intensity sensor used for testing, arraning the light intensity sensor on a test plate, rotating the light intensity sensor used for testing for 180 degrees in an east-west vertical plane or a south-north vertical plane by starting from the fact that the test plate is vertical to the ground plane on the test plate, recording a light intensity value and a corresponding angle value in the rotating process, making a difference between the light intensity values of adjacent items to obtain a point with the maximum difference value, taking the point as a jump point of the light intensity, taking an angle corresponding to the jump point as an optimal placing dip angle of the light intensity sensor used for testing, and according to the optimal placing dip angle, fixing the light intensity sensor used for testing; and 2) on the basis of the light intensity sensor used for testing, which is arranged on a surface plate, executing an automatic light following step, and regulating the dip angle of the surface plate to enable the surface plate to track the sun in real time. The method and the device for tracking the sun by the solar panel have the advantages of high precision and easiness in implementation.
Owner:CENT SOUTH UNIV
A thin coal seam coal-rock interface recognition device based on ultra-wideband chaotic radar
ActiveCN105649624BMeet the requirements of unmanned miningImprove anti-interference abilityTesting machinesSlitting machinesUltra-widebandAnti jamming
Owner:TAIYUAN UNIV OF TECH
A smart coaster
ActiveCN106805685BStrong measurement accuracyHigh measurement accuracyUnderlaysCommunication interfaceWater volume
The invention discloses a smart cup mat which comprises a control module, a weighing and acquiring module, a water cup communication interface, a charging management module, a battery, a USB charging interface, a wireless charging interface and a wireless data transmission module. The weighing and acquiring module acquires and converts weight information of a water cup into digital quantity information and transmits the information to the control module, the water cup communication interface acquires and transmits water quality parameters and water volume information to the control module, the control module corrects the weight information of the water cup according to the water volume information, the charging management module is connected with the control module, the USB charging interface is connected with the charging management module and used for charging the battery in a wired mode, the wireless charging interface is connected with the charging management module and charges the battery in a wireless mode, and the control module performs information interaction with the wireless data transmission module. The cup mat measurement accuracy can be improved, inconvenience and danger in the charging process can be avoided, and ductility is stronger.
Owner:深圳市同研技术有限公司
A method for improving sensitivity of fbg sensor based on cantilever beam structure
ActiveCN105571619BIncrease the amount of strain changeImprove sensor sensitivityConverting sensor output opticallySelf compensationHigh pressure
The invention provides an FBG sensor sensitivity improving method based on a cantilever structure. The method comprises the steps of: forming a through hole in a suitable position of the cantilever; determining the maximum part of two positive strains and the maximum part of two negative strains of the cantilever at present; bonding one FBG to the maximum part of two positive strains and the maximum part of two negative strains of the cantilever respectively; and superposing spectrums of the two FBGs and utilizing an FBG spectrum broadening effect to carry out sensing demodulation on the two FBGs. According to the invention, a simple punching method is utilized to add strain changes, and the ingenious design of the bonding positions of the FBGs and the suitable demodulation mode are adopted, so that the sensing sensitivity is improved, and temperature self-compensation and multi-parameter sensing measurement are realized; in addition, the FBG sensor sensitivity improving method has the advantages that the interference resistance is high, the long-term drifting is small, the measuring precision is high, and flow measurement under severe industrial environments such as high temperature, high pressure and high electromagnetic interference can be realized.
Owner:ANHUI CASZT PHOTOELECTRIC MEASUREMENT & CONTROL TECH CO LTD
Smart cup mat
ActiveCN106805685AStrong measurement accuracyHigh measurement accuracyUnderlaysCommunication interfaceWater volume
The invention discloses a smart cup mat which comprises a control module, a weighing and acquiring module, a water cup communication interface, a charging management module, a battery, a USB charging interface, a wireless charging interface and a wireless data transmission module. The weighing and acquiring module acquires and converts weight information of a water cup into digital quantity information and transmits the information to the control module, the water cup communication interface acquires and transmits water quality parameters and water volume information to the control module, the control module corrects the weight information of the water cup according to the water volume information, the charging management module is connected with the control module, the USB charging interface is connected with the charging management module and used for charging the battery in a wired mode, the wireless charging interface is connected with the charging management module and charges the battery in a wireless mode, and the control module performs information interaction with the wireless data transmission module. The cup mat measurement accuracy can be improved, inconvenience and danger in the charging process can be avoided, and ductility is stronger.
Owner:深圳市同研技术有限公司
Pipe calibration platform instrument
ActiveCN105136032BReduce production errorsImprove working environmentUsing optical meansEngineeringReference line
The invention discloses a pipe calibration platform instrument, which is characterized in that it includes a fixed installation platform and several measuring devices, and the fixed installation platform includes a horizontal reference plate with X scale lines and Y scale lines and a horizontal reference plate perpendicular to the horizontal reference plate. Consisting of a vertical reference plate, the vertical reference plate is provided with a connecting hole for fixing the mounting flange of the measured pipe fitting, the measuring device includes a scale column, and a base that can be fixed on the horizontal reference plate, the base is provided with a panel, The scale column is provided with an infrared projector that can slide up and down along the scale column, and a rotation angle disc is fixed at the lower end of the scale column, and the rotation angle disc is connected with the panel and can rotate relative to the panel.
Owner:GUANGXIN SHIPBUILDING & HEAVY IND
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