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54results about How to "Simple measuring device" patented technology
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Chaotic visible laser-based optical fiber fault positioning device and positioning method thereof
ActiveCN102739311ASimple device structureSimple measuring deviceElectromagnetic transmissionElectromagnetic wave reradiationVisible laserPhotovoltaic detectors
The invention discloses a chaotic visible laser-based optical fiber fault positioning device and a positioning method thereof. The positioning device comprises a chaotic visible laser emitting device, an optical fiber coupler, an optical circulator, a photoelectric detector, an A / D (Analog / Digital) converter, a signal processing device and a display device. Chaotic visible laser signals emitted by the chaotic visible laser emitting device generate obvious visible bright spots at a fault point (11) of an optical fiber line to be tested (4) due to transmission, and the accurate positioning of the fault point can be realized by finding the visible bright spots in a range of the distance between a detection point and the fault point (11). According to the positioning device and the positioning method, the chaotic visible laser is used as a detection light source, and a chaos-related fault point detection technology and a visible optical fiber fault point detection technology are integrated, so that the fast and accurate detection and positioning of the optical fiber fault point is realized, and the problem that the optical fiber fault point is easily measured and not easily positioned is solved.
Owner:TAIYUAN UNIV OF TECH
Complete optical fiber polarization type pressure measurement method and sensing device
ActiveCN101251427ALow costSimple measuring deviceForce measurement by measuring optical property variationCoupling light guidesFiberMeasurement device
The invention relates to a full optical fiber polarization type pressure measuring method and a sensing device, which belongs to the optical fiber sensing field. The method comprises the following steps that: the light emitted from a measuring light source passing through an optical fiber for sensing after becoming a linearly polarized light beam and being divided into two orthogonal light beams in polarization; applying pressure on the optical fiber to enable the optical fiber to produce birefringence related with the pressure; respectively measuring the light intensities of the two light beams; determining the size of the pressure on the optical fiber according to the changes of the light intensities of the two light beams. The method provided by the invention introduces the conventional single-mode fiber as a sensing body and adopts a light polarization beam splitter as a polarization characteristic element, thereby simplifying a measuring device, reducing material cost and insertion loss. The device provided by the invention adopts a full optical fiber light path system outside a probe to carry out long-distance signal transmission and ensure the measuring safety.
Owner:苏州光环科技有限公司
System and method for applying impact current for measuring grounded screen electric resistance and inductor
ActiveCN101236222ASimple measuring deviceEasy to operateEarth resistance measurementsAC powerCapacitance
The invention relates to a system and a method of measuring the resistance and inductance of an earthed network through dash current, which solve the problem of measuring the ground impedance, resistance and inductance of the earthed network when the lightning current passes through the earthed network. The input of a dash current generator (B) is connected with the output of an isolating transformer (A), the input of the isolating transformer (A) is connected with an AC power supply, the output of the dash current generator (B) charges a capacitor (I) through a silicon stack (C) and a protective resistance (D), a silicon controlled (G) controls the capacitor (I) to discharge to a test loop, a shunting resistance (F), an adjustable inductance (E) and an equivalent ground network (H) are connected in series in the discharge loop of the capacitor (I), and a first divider resistance and a second divider resistance (M1, M2) are connected in parallel with the equivalent ground network (H). The shunting resistance (F) and the second divider resistance (M2) are connected with the input of an A / D converter (J), and the output of the A / D converter is connected with a microprocessor (K).
Owner:STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST +1
Monitoring and measuring method using displacement sensor to measure tunnel deformation
ActiveCN102914282ASimple measuring deviceQuick testMeasurement devicesMeasurement pointSensor holder
The invention provides a monitoring and measuring method using a displacement sensor to measure tunnel deformation. The monitoring and measuring method comprises the steps of setting a measurement point on a section of an arc tunnel, and connecting a line; arranging a connection rod at an arc measurement point; fixing a displacement transfer rod on the connection rod and fixing a first base on the connection rod; arranging a horizontal measuring rod at the position of the measuring point, and arranging a second base on the horizontal measuring rod; respectively setting the crosspoints of the displacement transfer rod and a horizontal measuring line as a first measurement point and a second measurement point; fixing a displacement sensor bracket on the first base or the second base, and arranging a horizontal direction displacement sensor and a vertical direction displacement sensor on the displacement sensor bracket; measuring horizontal clearance variation and vertical clearance variation, judging the deformation situation of the tunnel accordingly, calculating the horizontal clearance variation between a left measurement point and a right measurement point, and calculating a mean value of the vertical clearance variation between the arc measurement point and the horizontal measurement line. The monitoring and measuring method provided by the invention has the advantages of rapidness in test, high testing precision, less interference on construction and low cost, can be used for monitoring in real time, and can be used for determining whether the tunnel is biased or not according to the testing result of the clearance variation of the channel.
Owner:CHINA RAILWAY TUNNEL GROUP CO LTD +1
Device and method for detecting wind-cooling radiating system radiating performance
InactiveCN1979145ALow costTimely detection of heat dissipationMaterial thermal conductivityMaterial heat developmentMaintainabilityTemperature difference
The invention discloses a device and method for testing air cooling heat-removal system performance. It sets specimen in flue of air cooling heat-removal. By controlling the temperature difference between specimen and external temperature to determine thermal convection resistance of the system, the performance of the system would be judged according to the thermal convection resistance. It has the advantages of simple method, high sensitivity, low cost and real time detecting heat-removal situation, and improving the maintainability of communication device.
Owner:HUAWEI TECH CO LTD
Microwave sensor used for detecting steam humidity
InactiveCN101183081AHigh quality factorLower requirementMoisture content investigation using microwavesEngineeringConcentric cylinder
A microwave sensor used for steam humidity detection belongs to the technical field of testing and is used to solve the problem of steam humidity detection. The technical solution is that it includes a cylindrical cavity with openings at both ends and a microwave signal transmission interface in the middle, and a ring divider is respectively arranged at both ends of the cylindrical cavity, and the ring divider is composed of It consists of 1 to 4 cylinders coaxial with the cylindrical cavity, one end of which is close to the port of the cylindrical cavity is connected with the cylindrical cavity, and the expansion coefficient of the ring separator is larger than that of the cylindrical cavity. The invention has the advantages of simple structure, convenient use and low requirements on the environment, and can realize high-precision online measurement of the humidity of flowing wet steam by cooperating with the microwave signal processing circuit.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Method and device for improving detection sensitivity of static collecting method emanometer
ActiveCN103984001AHigh detection sensitivityEasy to measureRadiation intensity measurementElectrical field strengthStatic field
Owner:HENGYANG NORMAL UNIV
Device and method for measuring spatial free attitude of rigid object, and method for analyzing data
InactiveCN102162718ASimple measuring deviceHigh measurement accuracyPhotogrammetry/videogrammetryStatic/dynamic balance measurementMeasurement deviceData processing
The invention discloses a device and a method for measuring a spatial free attitude of a rigid object, and a method for analyzing data, and relates to a measurement technology. The device comprises a planar orthogonal four-directional cursor generation device and a linear array charge coupled device (CCD); and the linear array CCD is provided with a data output interface. In the invention, a position detector consists of a plurality of linear array CCDs, so the problem that a detector with a large planar array position cannot be substituted is solved, the measurement device is simplified and the same measurement precision within a measurement range can be guaranteed. By adoption of the method for processing the data, the measurement of a linear light position can reach the subpixel level under the condition of poor data quality; and finally, a systematic measurement result can reach a higher level.
Owner:INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
Magnetic suspended rotor axial displacement radial measurement method
ActiveCN107314737ALarge measuring rangeMeet the measurement requirementsUsing electrical meansAxial displacementMeasurement device
The invention discloses a magnetic suspended rotor axial displacement radial measurement method. The method comprises the following steps: a conical measurement block and a plurality of displacement measurement devices are provided; the conical measurement block and the magnetic suspended rotor are arranged coaxially; the at least three displacement measurement devices are arranged on a first mounting line parallel with the axis of the magnetic suspended rotor, and one displacement measurement device is located at the side of the conical measurement block; the rest at least two displacement measurement devices are arranged on a second mounting line parallel with the axis of the magnetic suspended rotor; the first mounting line and the second mounting line are mutually vertical to a plane formed by the axis of the magnetic suspended rotor; the displacement measurement devices at the conical measurement block are divided to components along the axial direction and the radial direction of the magnetic suspended rotor, and in combination of values of other sensors, the axial displacement of the magnetic suspended rotor is decoupled and obtained. The magnetic suspended rotor axial displacement is accurately and reliably measured by the method, the measurement is easy to realize, and the measurement range is large.
Owner:WUHAN UNIV OF TECH
Microwave sensor used for detecting steam humidity
InactiveCN101183081BHigh quality factorLower requirementMoisture content investigation using microwavesMicrowave signalsMicrowave sensor
The present invention provides a microwave sensor used for measuring the humidity of vapor, which belongs to the measuring technical field and used to solve the problem of the vapor humidity measuring. The technical proposal is: the present invention comprises a two-end opening and a cylinder cavity body with a microwave signal transmission receiver in the middle. Two ring separators are respectively arranged at the two ends of the inner part of the cylinder cavity body which consists of 1 to 4 barrels which are coaxial with the cylinder cavity body. One end of the ring separator near the cylinder cavity body is connected with the cylinder cavity body. The expansion coefficient of the ring separator is larger than the cylinder cavity body. The present invention is of simple structure, easy to be used, low requirement to environment, and can be cooperated with a microwave signal processing circuit and can realize the high-accuracy on-line measurement of the humidity of flowing moist steam.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Dual-camera measuring method for accurate calibration of distance between optical identification points
ActiveCN106289086ASimple measuring deviceSimple and easy to implementUsing optical meansPhysicsAccuracy and precision
The invention discloses a dual-camera measuring method for accurate calibration of distance between optical identification points. The method, by calibrating the relative position of the two cameras by using a single-shaft motor displacement platform, increases the calibration precision of a binocular stereo vision system and the measuring precision of 3 dimensional coordinates of the optical identification points, and achieves the purpose of accurate calibration of the distance between optical identification points. The method comprises the following steps: using a calibration board to calibration the binocular stereo vision system to obtain the internal parameter matrixes and deformation parameter matrixes of the two cameras and the rotation matrix and the translation vector of the second camera with respect to the first camera; using the single-shaft motor displacement platform to translate a single optical identification point for a known distance, using the known distance to complete the calibration of the binocular stereo vision system; using the calibrated binocular stereo vision system, based on the basic binocular stereo vision theory, to conduct accurate measurement on the distance between two identification points on a reference scale in a direct way.
Owner:SOUTHEAST UNIV
Device and method thereof for acquiring transmission fluctuation spatial correlation spectrum
InactiveCN101706405AReal-time online measurementSolve the problem of measurement range limitationParticle size analysisParticle suspension analysisChemical industryFrequency spectrum
The invention relates to a device and a method thereof for acquiring a transmission fluctuation spatial correlation spectrum. A polychromatic light source is used for irradiation, when the light source passes through a dispersor, the distances between an incident light focus and reflected light focuses with different wavelengths in a measurement region are different, and thus the corresponding spatial correlations are different. An incident light beam and a reflected light beam are dispersed and absorbed in the measurement region under the action of particles, thereby causing extinction. A split light beam passes through a half reflecting and half transparent plain glass and is focused on a light sensing element by a lens, thereby obtaining a transmission correlation spectrum. The invention effectively solves the problem that the particle measurement range is limited because of mechanical operation in the measurement process. A transmission fluctuation spatial correlation spectral method is irrelevant to the flow field of the particles, has simple structure and can be used for detecting a particle system in laminar flow and onflow states in real time and on line, thereby testing the particle size distribution and the concentration of micron-sized particles. The invention can be widely applied to various fields of scientific research, production and process control of chemical industry energy sources, environment protection, water quality detection and particle measurement.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
Device and method for measuring disturbance of cross flow fan impeller of pulsed gas laser
InactiveCN103048112ASimple measuring deviceHigh precisionAerodynamic testingData acquisitionLaser light
The invention discloses a device and a method for measuring disturbance of a cross flow fan impeller of a pulsed gas laser. The device and the method are mainly used for measuring the disturbance of the fan impeller. The device comprises an exploring laser light source, a beam expanding system, two spectroscopes, two reflecting mirrors, a photoelectric detector, a data acquisition unit and a processor, wherein the two spectroscopes and the two reflecting mirrors form a Mach-Zehnder interferometric system; the two spectroscopes are respectively arranged at both ends of a flow field area to be tested; the exploring laser light source, the beam expanding system and a first spectroscope are located on the same light path in sequence; and the photoelectric detector is located on the emergent light path of a second spectroscope. The method comprises the following steps: performing filtering on a signal, and then performing fast Fourier transform (FFT) treatment on the signal through controlling the data sampling frequency and the number of samples; converting a periodic disturbance signal of a time domain into a signal of a frequency domain to obtain a signal spectrum so as to determine the disturbance of the fan impeller. According to the device and the method disclosed by the invention, the disturbance information of fan rotation is obtained through an optical measurement mode. The device and the method have the characteristics that the measuring device is simple and is high in precision and convenient in operation and the method is very high in practical applicability.
Owner:HUAZHONG UNIV OF SCI & TECH
Process for monitoring and controlling of thermal spray process
InactiveUS20060201917A1Simple measuring deviceEasy to separateMolten spray coatingArc welding apparatusMulti materialThermal spraying
A process for monitoring the spray stream during thermal spraying of spray material, which contains at least two different materials A and B, by means infrared thermography, wherein the thermographic measured values are divided into at least two regions of the radiation intensity and these are assigned or associated to the respective image data for the at least two materials A and B as well as processes for controlling a thermal spray process with spray material multiple materials, wherein the material distribution of at least two materials A and B and their material specific average temperatures and / or radiation intensities within the spray stream are employed as normed values for the spray parameter carrier gas flow through, burner or flame power and / or material dosing.
Owner:DAIMLER AG
Method for quickly measuring heat conductivity coefficient of semiconductor film
InactiveCN105738408ASimple measuring deviceMeasure signal strengthMaterial heat developmentDiffusionThermal diffusion coefficient
The invention relates to a method for quickly measuring a heat conductivity coefficient of a semiconductor film. The method comprises the following steps: sputtering semiconductor films in thickness of delta<2> for n times on a substrate material spluttered with a gold film, thereby forming n samples; calculating thermal diffusion coefficients alpha<eff,n> of the n samples by adopting a transient electric heating technique under equal environmental conditions; performing linear fitting on n sets of alpha<eff,n>, thereby acquiring slope; solving the heat conductivity coefficient k<c> of the semiconductor film in thickness of delta<2> according to slope=4delta<max>[k<c>-alpha<w>(rho c)<c>] / pi D(rho c)<w>. According to the method provided by the invention, the measuring device is simple, the measuring signal is strong, the measuring period is short and reliable parameter data can be supplied for the setting of thermophysical property of various ultra-thin semiconductor films in thermal design and thermal management of the electronic products at present.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY
Method for measuring median particle diameter of particles in exhaust gas of diesel engine
ActiveCN103630471AHigh measurement accuracySimple measuring deviceParticle size analysisPower flowImaging processing
The invention relates to the technical field of measurement and provides a method for measuring and calculating the median particle diameter of particles in the exhaust gas of a compression ignition engine. A method for measuring the median particle diameter of the particles in the exhaust gas of a diesel engine mainly comprises the following steps: collecting particle samples to be measured; dispersing the particle samples to be measured; acquiring an electron microscope image of dispersed particles; judging the dispersion degree of agglomerated particles; and solving the diameter of a single particle in Mi to finally obtain the median particle diameter D50 of the particles in the exhaust gas of the diesel engine. Compared with the prior art, the method has the characteristics that the particle diameter can be obtained without conversion of the current and the particle diameter; and the particles with the particle diameter of 0.1 to 0.5 micron can be intuitively obtained. Through the particle electron microscope image processing, the single particle can be distinguished, and the particle diameter measurement accuracy of the particles is improved.
Owner:JIANGSU UNIV
Method for correcting influence of thermal current on related measuring precision of digital image
ActiveCN108955551ASimple measuring deviceEasy to implementUsing optical meansMeasurement deviceAirflow
The invention discloses a method for correcting influence of thermal current on the related measuring precision of a digital image. A circular identification point array before and after that influence of thermal current is stabilized is identified, a 3D-DIC algorithm is used to solve displacement of a test piece sprayed with speckled along directions x, y and z, a parameter matrix in which the influence of thermal current causes a virtual displacement field of circular identification points is used to correct the displacement along the directions x, y and z, and thus, a more accurate surfacedisplacement field of the tested piece under influence of the thermal current is obtained. According to the method, a measuring device is simple, realization is easy, use is convenient and effective,the relative cost is lower, the influence of the thermal current on system imaging is reduced effectively, and the influence of thermal current on related measurement precision of the digital image can be corrected effectively.
Owner:SOUTHEAST UNIV
Damage-free quick measurement method of high temperature contact thermal resistance
ActiveCN107966472ALimit distractionsLimit the measurement rangeMaterial heat developmentMeasurement deviceFast measurement
The invention discloses a damage-free quick measurement method of a high temperature contact thermal resistance. According to the medium temperature-ultrasonic propagation characters, ultrasonic propagation time under a transient heat transfer condition is acquired by means of an ultrasonic-echo method, and further the inverse problem of thermo-conduction is subjected to optimization solution, sothat the interface contact thermal resistance parameters, changing with temperature, are measured in a quick, damage-free and non-contact manner. The method only needs simple measurement devices and short measurement period, is free of contact between a sensor and a to-be-tested test piece, so that interference due to the contact between the sensor and the to-be-tested test piece and limitation onmeasurement range due to high temperature resistance of the sensor are avoided.
Owner:CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
Method for closing in self-locking nut
The invention discloses a method for closing in a self-locking nut. A measurement device comprises a force value sensor, a controller, a force exerting rod and a closing-in block. An original closing-in tool is basically unchanged, and the measurement device is used. The force value sensor is additionally arranged on the back face of the force exerting rod. Force generated by the fact that the closing-in block is pressed by the force exerting rod to press the self-locking nut is converted into an electric signal, then stress information is fed back to the controller through the sensor, when a force value is equal to a set value, the controller sends out a signal, work is stopped, and resetting is carried out. Deformation resistance generated by the self-locking nut is coincident through the cooperation of the sensor and the controller, the mode that the closing-in size of the self-locking nut is controlled is changed into the mode that the deformation resistance of the self-locking nut is controlled, a control method is changed, the coincidence of locking force is good, the measurement device and the method are simple, and the coincidence of the locking force after the self-locking nut is closed in is improved. The deviation, caused by the machining tolerance, of the locking force of the self-locking nut is eliminated.
Owner:GUIZHOU HANGRUI AVIATION PRECISION PARTS MFG
Ultrasound-based non-destructive measurement method of intensity and position of internal heat source
ActiveCN109470772ASimple measuring deviceSimple and fast operationAnalysing solids using sonic/ultrasonic/infrasonic wavesNon destructiveTemporal change
The invention provides an ultrasound-based non-destructive measurement method of the intensity and position of an internal heat source. The method is characterized in that the time delay characteristic and the boundary temperature variation of ultrasonic waves during the internal propagation in a structure are simultaneously considered, and the solution is performed combining with inverse heat conduction problems, so as to perform non-destructive and fast measurement on the intensity and position of the heat source, which can change along with time in the structure. In the invention, no temperature information of internal points of the structure is needed to be acquired, so that measuring devices are simplified, and the operation is easy and convenient; and compared with an infrared detection technique of the internal heat source, the method disclosed by the invention can more effectively detect the intensity and position of the internal heat source of the structure, and has the advantages of high measuring speed, large measuring range and the like.
Owner:CHINA SPECIAL EQUIP INSPECTION & RES INST
Frosting uniformity measurement method and system
InactiveCN107166679AThe measurement method is simpleSimple measuring deviceSpace heating and ventilation safety systemsLighting and heating apparatusVoltageEngineering
The invention discloses a frosting uniformity measurement method and system. The system is applicable to an outdoor multi-loop heat exchanger of an air source heat pump. The method comprises the following steps: acquiring the receiver voltage VOUT of a photoelectric sensor wound around the coil pipe outlet of each heat exchanger loop at the same time; exporting the output voltage signal UTEPS of each photoelectric sensor through logical operation; acquiring the frosting amount F of each heat exchanger loop through logical operation; comparing the frosting amount F of one heat exchanger loop with those of the other heat exchanger loops, and selecting the maximum value and the minimum value; and calculating the frosting uniformity FEV. The method has the advantages that only several related physical quantities need to measure; the voltage value of each photoelectric sensor is regarded as the most important measurement data; the measurement mode is simple; the relatively precise measurement can be performed without very large equipment; and the air source heat pump needs not be stopped in the measurement process. Therefore, the technical problem about how to measure the frosting uniformity of the air source heat pump provided with the outdoor multi-loop heat exchanger and other related problems can be effectively solved.
Owner:GUANGDONG UNIV OF TECH
Shield tunneling machine cutterhead wear on-line measurement method
ActiveCN110006384AReduce pressurized constructionEasy to masterMeasurement devicesHydraulic cylinderMeasurement device
The invention provides a shield tunneling machine cutterhead wear on-line measurement method, which utilizes a foam hole in an existing shield tunneling machine cutterhead, can realize on-line measurement through a hydraulic oil cylinder, a pressure sensor and a displacement sensor, reduces personnel pressurization construction, is simple in measurement device, is convenient for mastering the wearamount of a cutter at any time, and avoids delaying a construction period.
Owner:CHINA RAILWAY TUNNEL GROUP CO LTD +1
Various mixed gas pressure measuring device and method based on saturation absorption spectrum
ActiveCN106595945ASimple measuring deviceSimple methodFluid pressure measurement by optical meansMeasurement deviceFrequency shift
The invention relates to a various mixed gas pressure measuring device and method based on a saturation absorption spectrum; the method comprises the following steps: measuring a laser absorption spectrum of the alkali metal atom when various gases exist in an alkali metal air chamber, fitting to obtain the aliasing pressure broadening and frequency shift of the various mixed gases in the alkali metal air chamber; simultaneously calculating to obtain pressure of each of various gases according to pressure broadening and frequency shift corresponding to known single and unit pressure gas. When n alkali metals exist, the device and method can measure 4n mixed gases at most. When the alkali metal air chamber contains two or more mixed gases, the method and the device can preciously measure the pressure, i.e., the inertia based on spin exchange relaxation free regime and the alkali metal air chamber portion in a magnetic field measure apparatus.
Owner:BEIHANG UNIV
Vector Doppler effect measurement method and device
ActiveCN110632585AIntegrity guaranteedSimple measuring deviceRadio wave reradiation/reflectionOptical measurementsMoving speed
The invention discloses a vector Doppler effect measurement method and device. The method achieves the simultaneous measurement of the movement speed and direction of a transverse moving object through a polarization non-uniform distribution vector light field. The device comprises a polarization non-uniform distribution vector light source and a detection device, wherein the polarization non-uniform distribution vector light source is used for generating a transverse vector light field or a cylindrical vector light field, and the detection device is used for detecting vector Doppler signals obtained by sampling different spatial positions in the vector light field by the transverse moving object, so that the movement speed and direction of the transverse moving object are measured at thesame time. According to the invention, full-vector information of the moving speed and direction of the transverse moving object can be measured simultaneously, the method breaks through the limitation that the traditional scheme can only measure the speed of transverse moving object and cannot distinguish the direction, can also monitor the motion state of the object in real time, has wide application prospects in the aspects of optical measurement, sensing and the like, and fills up the blank in the related technical fields.
Owner:HUAZHONG UNIV OF SCI & TECH
Optical fiber fault location device and location method based on chaotic visible laser
ActiveCN102739311BRealize measurementOmit Auxiliary MeasurementsElectromagnetic transmissionOptical apparatus testingFiberPhotovoltaic detectors
The invention discloses a chaotic visible laser-based optical fiber fault positioning device and a positioning method thereof. The positioning device comprises a chaotic visible laser emitting device, an optical fiber coupler, an optical circulator, a photoelectric detector, an A / D (Analog / Digital) converter, a signal processing device and a display device. Chaotic visible laser signals emitted by the chaotic visible laser emitting device generate obvious visible bright spots at a fault point (11) of an optical fiber line to be tested (4) due to transmission, and the accurate positioning of the fault point can be realized by finding the visible bright spots in a range of the distance between a detection point and the fault point (11). According to the positioning device and the positioning method, the chaotic visible laser is used as a detection light source, and a chaos-related fault point detection technology and a visible optical fiber fault point detection technology are integrated, so that the fast and accurate detection and positioning of the optical fiber fault point is realized, and the problem that the optical fiber fault point is easily measured and not easily positioned is solved.
Owner:TAIYUAN UNIV OF TECH
Method and system for measuring density of desulfurization slurry in power plant desulfurization pre-washing tower
InactiveCN105973750ASimple measuring deviceHigh measurement accuracySpecific gravity by measuring pressure differencesEngineeringAccuracy and precision
The invention relates to a method for measuring density of desulfurization slurry in a power plant desulfurization pre-washing tower. The method includes: measuring slurry pressures of the pre-washing tower at different horizontal heights, subtracting the measurements to obtain a slurry pressure difference P corresponding to a difference h of the different horizontal height, and acquiring density Rho of the desulfurization slurry in the pre-washing tower according to the formula: Rho = P / (gh). Also related to is a system for measuring density of desulfurization slurry in a power plant desulfurization pre-washing tower, and the density of desulfurization slurry is measured precisely using the method. The density of desulfurization slurry in the desulfurization pre-washing tower can be measured precisely through the system and method, measuring equipment is simplified, and measuring precision is improved; meanwhile, the system is simple in structure, the method is simple, and the system and method have significant effect and are suitable for popularization and use.
Owner:DATANG HANCHENG NO 2 POWER GENERATION
Device for measuring nonlinear absorption curve of material
ActiveCN106198450ALow response thresholdSimple measuring deviceColor/spectral properties measurementsCcd cameraNonlinear absorption
The invention provides a device for measuring a nonlinear absorption curve of a material. According to the device, required single-wavelength laser is acquired by using a crystal frequency doubling system and a dispersing prism, intensity of incoming laser is increased through a long-focus lens, a scientific-level CCD (charge coupled device) camera records the energy and spot size of the incoming laser, energy of exiting laser is measured through an energy meter, and the nonlinear absorption curve of a sample under detection is acquired. The device provides a wider measuring range for the nonlinear absorption curve, a nonlinear absorption curve measuring system is simplified, and multi-wavelength, wide-range and high-precision nonlinear absorption curve measurement is achieved.
Owner:LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
PEPS system field intensity calibration method and system
PendingCN112838901ASimple measuring deviceLower threshold and professionalismTransmission monitoringIndividual entry/exit registersEngineeringReal-time computing
The invention discloses a PEPS system field intensity calibration method and a PEPS system field intensity calibration system.The PEPS system field intensity calibration method is suitable for the PEPS system field intensity calibration system.The PEPS system field intensity calibration method comprises the steps: marking all test points of a vehicle body at equal intervals; establishing a test data table according to the test points in the action area of the plurality of low-frequency antennas; obtaining RSSI values of all test points; calculating a threshold value of the RSSI value; and determining the position of the intelligent key according to the threshold value of the RSSI value. The PEPS system field intensity calibration system comprises a plurality of low-frequency antennas, an intelligent key, a vehicle body controller and a display, wherein the low-frequency antennas, the intelligent key, the vehicle body controller and the display are electrically connected. The method has the advantages that the intelligent key is used as a measurement tool for PEPS system field intensity calibration, and the space inside and outside the vehicle is divided through the action area of the low-frequency antenna, so that the calibration workload is reduced, and the calibration speed is increased.
Owner:NANJING TACKING AUTOMOTIVE ELECTRONICS CO LTD
HCT measuring device and method and chemiluminiscence instrument with HCT measuring device
InactiveCN111707589ASimple measuring deviceThe detection operation process is simpleChemiluminescene/bioluminescenceSedimentation analysisPhysicsWhole blood units
The application discloses an HCT measuring device and method and a chemiluminiscence instrument provided with the HCT measuring device. The HCT measuring device comprises a shell, a liquid injection port is formed in the shell, the liquid injection port is communicated with a measuring cavity, and the other end of the measuring cavity is connected with a liquid pumping device; a measuring mechanism comprises an insulation sealing device and a graphite electrode plate, the insulation sealing device and the graphite electrode plate are pressed and fixed in the measuring cavity through an electrode pressing plate, and the electrode pressing plate is fixedly connected to the shell; the graphite electrode plate is in direct contact with a probe and is used for detecting the resistivity of a detected whole blood sample; a control analysis module arranged in the shell comprises a signal generator, a signal acquisition and processing module and a central processing unit which are connected with one another; the signal generator is used for outputting a driving signal to a whole blood sample, the signal acquisition and processing module is used for acquiring an electric signal detected by the probe and converting and transmitting the electric signal to the central processing unit after processing the electric signal, and the central processing unit is used for converting and calculatingresistivity and an HCT value.
Owner:GETEIN BIOTECH
Large-aperture optical element reflectivity measuring system
ActiveCN114486201ARealize imaging measurementQuick checkScattering properties measurementsTesting optical propertiesResonant cavityOptical cavity
The invention provides a system for measuring the reflectivity of a large-aperture optical element. In the system, a first light beam adjusting device converts wide-spectrum ultrafast laser into a linear light beam or a rectangular light beam; the initial optical resonant cavity does not comprise an optical element, and the linear light beam or the rectangular light beam is ring-down in the optical resonant cavity to form a first ring-down signal; the linear light beam or the rectangular light beam is ring-down in a test optical resonant cavity comprising an optical element to form a second ring-down signal; and correspondingly determining first ring-down time of an initial optical resonant cavity and second ring-down time of a test optical resonant cavity according to the collected first ring-down signal and the second ring-down signal, and obtaining the reflectivity of the optical element according to the first ring-down time, the second ring-down time, the cavity lengths of the initial optical resonant cavity and the test optical resonant cavity. According to the invention, the reflectivity measurement precision and speed of the optical element can be improved.
Owner:CHONGQING UNIV
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