Product
Feature
Quick Research
Generate reliable direction feasibility study reports for your R&D in just a few steps.
Technical Q&A
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
Find Solutions
As an expert in R&D theories, this can generate solutions to your technical problems instantly.
Evaluate Feasibility
Analyze your overall solution with one click, know your potential R&D risks in advance.
Monitor Landscape
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
62results about How to "Realize dynamic calibration" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Accelerometer calibration method based on GPS velocity information
InactiveCN102662083ARealize dynamic calibrationHigh accuracy of measured valuesTesting/calibration of speed/acceleration/shock measurement devicesGps measurementLinear motion
The invention, which belongs to the combined navigation technology field, discloses an accelerometer calibration method based on GPS velocity information. The method comprises the following steps: step 1, collecting measurement data of a GPS measurement system and a DR measurement system; step 2, determining usability of the GPS measurement data; step three, employing a least square method to estimate a scale factor and a zero offset error of an accelerometer; step four, comparing estimation values of the scale factor and the zero offset error of the accelerometer with estimation values of a preset accelerometer scale factor and a preset accelerometer zero offset error to determine whether updating is carried out; and step five, meeting a time interval requirement and then returning to the step two to carry out next calibration. According to the invention, a GPS characteristic that the GPS enables a measurement value precision to be high at a linear motion segment with good signal reception and high speed is utilized to realize dynamic calibration on an accelerometer, so that calibration parameter of the accelerometer can be updated regularly and an influence on the system precision by a zero offset change caused by different starting and temperature changes can be reduced. Moreover, the realization is simple, the calculation amount is small, and the result is reliable.
Owner:BEIHANG UNIV
Dynamic threshold timing circuit, lidar, and method for obtaining time information
ActiveCN110784220BRealize dynamic calibrationReduced range requirementsAnalogue-digital convertersConvertersTime information
The present invention relates to a dynamic threshold timing circuit, comprising: a comparator, the comparator has a first input terminal, a second input terminal and an output terminal, the first input terminal can receive an external input signal, the second input terminal The terminal can receive the detection threshold; the time-to-digital converter, the time-to-digital converter is coupled to the output terminal of the comparator, to obtain the time information of the output signal of the comparator; the controller, the controller is configured to may receive the external input signal, generate the detection threshold according to the external input signal and provide the detection threshold to the second input terminal of the comparator, wherein the detection threshold and the noise in the external input signal relevant.
Owner:HESAI TECH CO LTD
Multi-dimensional force sensor calibration device with controllable poses
InactiveCN103926038ARealize dynamic calibrationRealize functionForce/torque/work measurement apparatus calibration/testingChinese charactersEngineering
The invention provides a multi-dimensional force sensor calibration device with controllable poses. The multi-dimensional force sensor calibration device comprises a fixing platform, drive mechanisms, connecting rod mechanisms and a moving platform. The upper ends of the drive mechanisms and the lower ends of the connecting rod mechanisms are connected to form drive connecting rod mechanisms. The upper ends of the six drive connecting rod mechanisms are hinged to the moving platform through universal hinges, and the lower ends of the six drive connecting rod mechanisms are hinged to a fixed platform to form a six-freedom-degree parallel mechanism. The six drive connecting rod mechanisms are divided into three groups. Every two adjacent drive connecting rod mechanisms form one group and are arranged in the mode shaped like a Chinese character 'ba'. The poses of a calibration platform can be controlled and changed, and the calibration device has the function of calibrating a sensor dynamically and statically, and is complete in function, convenient to operate, high in calibration precision and capable of being well applied to practical engineering.
Owner:HARBIN ENG UNIV
Multiple star image and attitude associated star sensor internal parameter calibration method and device thereof
ActiveCN107449444ARealize splicing associationImprove calibration accuracyMeasurement devicesTime informationGyroscope
The invention discloses a multiple star image and attitude associated star sensor internal parameter calibration method and a device thereof. A GPS antenna 3, a gyroscope unit 1 and a to-be-calibrated star sensor 2 communicate with a GPS receiver 4 respectively, and a data processing computer 5 is connected with the gyroscope unit 1 and the to-be-calibrated star sensor 2 respectively; synchronous data acquisition of the gyroscope unit 1 and the star sensor 2 is realized by virtue of UTC (universal time coordinated) time information acquired by the GPS receiver 5, and calibration algorithm solution of the to-be-calibrated star sensor 2 is completed in the data processing computer 5. According to the method, the gyroscope unit is used for providing accurate rotating angle information to implement splicing association of a plurality of frames of star images, thereby increasing observed data samples for internal parameter calibration of the star sensor; the method can be used for calibration under a dynamic condition, no strict requirements are made to the motion state of the to-be-calibrated star sensor 2, the calibration accuracy and reliability are improved, a calibration flow is simplified, dynamic calibration of the to-be-calibrated star sensor 2 can be conveniently implemented, and the method and the device are also applied to calibration of an inertial / celestial combined navigation system.
Owner:NAT UNIV OF DEFENSE TECH
Calibration method for cathode filament emission characteristic curve of X-ray generator
ActiveCN104470175ACathode filament emission characteristic curve is accurateTube current accuracyX-ray apparatusPhysicsX-ray generator
The invention provides a calibration method for a cathode filament emission characteristic curve of an X-ray generator, and belongs to the technical field of X-ray generators. The calibration method comprises: in a practical operation process of an X-ray generator, setting filament current based on a first cathode filament emission characteristic curve, and generating X-rays through operation of the X-ray generator, and acquiring actual bulb current corresponding to the filament current, and using the filament current and the actual bulb current to dynamically calibrate the first cathode filament emission characteristic curve, to update to a second cathode filament emission characteristic curve. The calibration method can make the cathode filament emission characteristic curve dynamically calibrated, and the cathode filament emission characteristic curve is more accurate, and the setting of the bulb current is more accurate.
Owner:RAYCO SHANGHAI MEDICAL PROD
Shock wave pressure test installation structure for shock tube calibration
InactiveCN104990667ARealize dynamic calibrationGet dynamic propertiesForce/torque/work measurement apparatus calibration/testingEngineeringPressure sensor
The invention provides a shock wave pressure test installation structure for shock tube calibration, and belongs to the technical field of dynamic calibration. The shock wave pressure test installation structure is a pressure sensor installation structure of shock wave ground reflection pressure measurement in a damage condition. The structure can be installed at a tail end of a shock tube and performs dynamic calibration. The structure comprises a mounting base, a component, buffer spacers, a clamping element and a pressure sensor. The pressure sensor is installed on the component, the buffer spacers sleeve two ends of the component, the component is placed in the mounting base then, and the component is fixed to the mounting base through the clamping element. After installation is completed, an end face of the pressure sensor, an end face of the component and an end face of the mounting based are flush with each other. The dynamic calibration of a shock wave ground reflection pressure measurement system in an actual damage condition can be achieved, and actual dynamic characteristics of the shock wave ground reflection pressure measurement system are obtained.
Owner:XIAN MODERN CHEM RES INST
Water quality monitoring data online processing method and device
InactiveCN108108889ARealize dynamic calibrationGood repeatabilityGeneral water supply conservationColor/spectral properties measurementsEnvironmental noiseOptical spectrometer
The present invention provides a water quality monitoring data online processing method and device. The method comprises the steps of: obtaining a spectrum curve of water quality to be detected, setting a standard water quality spectrum curve as a reference, employing an autocorrelation function to calculate a related peak distance between the spectrum curve of water quality to be detected and thestandard water quality spectrum curve, and according to the related peak distance and sampling intervals, performing dynamic calibration of the spectrum curve of water quality to be detected; and performing noise removing processing of the spectrum curve after the dynamic calibration by employing a dual tree complex wavelet transform method, a threshold de-noising method and a dual tree complex wavelet inverse transform method, filtering the interference of noise signals, and finally, measuring a water quality reference value through a spectrometer according to the spectrum signals after noise removing process. Therefore, the spectrum signals with good repeatability can be obtained, the interference of water quality detection from outside environmental noise is avoided, and the accuracy of water quality detection is improved.
Owner:HANGZHOU DIANZI UNIV
Sine type optical pressure dynamic calibration cabin considering temperature control and optical path layout
ActiveCN110146220AEasy alignmentShorten experiment timeFluid pressure measurementForce/torque/work measurement apparatus calibration/testingResponse FrequencyEngineering
The invention relates to a sine type optical pressure-sensitive coating dynamic pressure calibration cabin, which is used for dynamic pressure calibration of a pressure-sensitive coating. By configuring a special optical precision platform, related components are self-designed and manufactured, and the optimization of an optical instrument alignment process of the dynamic calibration cabin is realized; and the optimization can greatly shorten the experiment time, optimize an experiment process and improve a dynamic response frequency. By selecting a PT100 temperature sensor, a heating ring anda matched temperature controller, accurate control on the temperature of the optical pressure-sensitive coating in the dynamic calibration process is realized, so that the influence of the temperature on dynamic response of the optical pressure-sensitive coating can be studied. Through the improvement of the dynamic calibration cabin, dynamic calibration of optical pressure sensitivity of all wave bands below 80kHz can be realized, the world advanced level is achieved, and the frequency is close to the practical frequency range of a turbomachinery. The calibration cabin is simple in structure, convenient to process, high in anti-interference capability and capable of effectively reducing the experiment cost.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Calibration platform and calibration method for six-dimensional acceleration sensor
InactiveCN102680739AEasy to assemble and disassembleEasy to change the amplitudeTesting/calibration of speed/acceleration/shock measurement devicesGear wheelReciprocating motion
The invention discloses a calibration platform and a calibration method for a six-dimensional acceleration sensor, and belongs to the field of multidimensional acceleration sensors or strap-down inertial navigation. Two horizontal turntables with cylindrical pins drive two sliding platforms with sliding chutes to reciprocally move along own guide rails respectively. Two gears are arranged on one sliding platform, and the end faces of rotating shafts fixedly connected to the gears are connected with a standard acceleration sensor and the six-dimensional acceleration sensor to be calibrated through inclined blocks respectively. A rack is arranged on the other sliding platform. A fine adjustment mechanism can be used for adjusting distances between the gears and the rack. The six-dimensional acceleration sensor can be comprehensively calibrated in different working modes by controlling the fitting and separation states of the gears and the rack and the running and stopping states of two motors.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Micro Fourier transform spectrometer
ActiveCN103344609AHigh control precisionAccurate motion precisionPhase-affecting property measurementsBeam splitterPlane mirror
The invention discloses a micro Fourier transform spectrometer comprising a light source and an interference system, wherein the interference system comprises a first beam splitter mirror, a movable mirror and a fixed mirror, a light beam emitted by the light source irradiates onto the first beam splitter mirror, the first beam splitter mirror divides a light beam into two paths, one path of the light beam irradiates the movable mirror, the other path of the light beam irradiates the fixed mirror, two light beams reflected by the movable mirror and the fixed mirror are reflected onto the first beam splitter mirror to form interference light paths and generate interference fringes, the movable mirror is an MEMS (Micro-electromechanical Systems) micro-mirror, the fixed mirror is an MEMS micro-mirror or a plane mirror, and if the fixed mirror is the MEMS micro-mirror, the fixed mirror generates displacement so as to perform phase modulation. The micro Fourier transform spectrometer disclosed by the invention is accurate in precision and small in volume.
Owner:无锡微文半导体科技有限公司
Marine diesel engine sliding main bearing thermoelectricity signal calibration device and calibration method
ActiveCN106840673AFlexible configurationImprove adaptabilityMachine bearings testingMaterial flaws investigationMain bearingData acquisition
The invention relates to a marine diesel engine sliding main bearing thermoelectricity signal calibration device. The diesel engine sliding main bearing thermoelectricity signal calibration device comprises an industrial computer, a programmable logic controller, a servo driver, a data acquisition card, a motor, a front supporting bearing, a rear supporting bearing, an experiment bearing, a rotate speed sensor, a thermoelectricity sensor, a torque sensor, a tile back temperature sensor, a lubricating oil temperature sensor, a lubricating oil pressure sensor, a hydraulic cylinder, a hydraulic oil tank, a hydraulic pump, a lubricating oil tank, a lubricating oil pump, a lubricating oil heater, a hydraulic sensor, and a displacement signal sensor. According to the technical scheme, a flexible feedback control strategy is adopted, the steady transition of rising and falling rotation speed and regulation of loading is guaranteed, a stable variable working condition is provided for testing the bearings, and thus dynamic calibration of thermoelectricity signals is achieved.
Owner:WUHAN UNIV OF TECH
Dynamic threshold timing circuit, laser radar and method for acquiring time information
ActiveCN110784220ARealize dynamic calibrationReduced range requirementsAnalogue-digital convertersConvertersTime information
The present invention relates to a dynamic threshold timing circuit, comprising: a comparator having a first input terminal capable of receiving an external input signal, a second input terminal capable of receiving a detection threshold, and an output terminal; a time-to-digital converter which is coupled with the output end of the comparator so as to acquire time information of an output signalof the comparator; a controller which is configured to be capable of receiving the external input signal, generating the detection threshold value according to the external input signal and providingthe detection threshold value for the second input end of the comparator, wherein the detection threshold value is related to noise in the external input signal.
Owner:HESAI TECH CO LTD
Fine-tracking control system for optical communication
ActiveCN102707732ARealize dynamic calibrationGuaranteed coaxialityControl using feedbackTelescopesControl systemOptical axis
The invention discloses a fine-tracking control system for optical communication. The fine-tracking control system comprises an image detector, a beam expanding mirror, a position sensor, a spectroscope, a tracking mirror, a sighting telescope and a laser. The tracking mirror receives target light; the beam route of a target light is provided with the tracking mirror, the spectroscope and the image detector in order; the laser outputs beacon light and is provided with the sighting telescope, the spectroscope and the tracking mirror on the beam route of the beacon light in order; and the beam route of the beacon light is provided with the sighting telescope, the spectroscope and the tracking mirror in order. The control system provided by the invention is mainly used for high-precision stable control of the optical communication. The system disclosed by the invention utilizes the sighting telescope to correct the difference between the position of the light and the position of the optical axis of the beacon light and enables the difference to be zero in essence. The system provided by the invention is realized as follows: the tracking mirror is in closed loop by utilizing the position of the target light provided by the image detector. The position sensor provides the position of the optical axis and the sighting telescope is in closed loop so as to enable the difference to approach zero.
Owner:INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
A method for calibrate helicopter airborne binocular stereo vision is disclose
ActiveCN109242918ASolving Calibration ProblemsRealize pose measurementImage enhancementImage analysisFlight testBinocular stereo
A method for airborne binocular stereo vision calibration of a helicopt is disclosed, belonging to the helicopter flight test technical field. The method includes mounting a binocular camera on a helicopt, Establishing camera coordinate system, calibrating the binocular camera by Zhang 's calibration method, obtaining camera internal reference, making A ground three-dimensional black-and-white checkerboard target is then made, determining the coordinates of at least four planar target vertices, controlling the helicopter to fly above the ground stereoscopic black-and-white checkerboard target,acquiring a target image by a binocular camera, at that same time, obtaining the position of the vertex of the planar target in the target image (shown in the description), obtaining the position ofthe plane target vertex in the airframe coordinate system (shown in the description) and finally Calculating helicopter airborne binocular stereo vision calibration parameters [Rt] according to the coordinate converting relationship (shown in the description) from the camera coordinate system to the airframe coordinate system (shown in the description). The application solves the calibration problem of a binocular vision measurement system in an airborne environment, and realizes the position and posture measurement of an object by using the binocular vision system on a helicopter.
Owner:CHINA HELICOPTER RES & DEV INST
High-precision dynamic calibration method applied to quartz flexible accelerometer
ActiveCN104237564ARealize dynamic calibrationGuaranteed measurement accuracyTesting/calibration of speed/acceleration/shock measurement devicesVoltage amplitudeAccelerometer
The invention discloses a high-precision dynamic calibration method applied to a quartz flexible accelerometer. The method comprises the steps that sinusoidal vibrational excitations with different frequencies and different amplitudes are applied to the quartz flexible accelerometer, and a dynamic calibration function of a frequency domain is obtained by conducting FFT and least square method curve fitting on an accelerometer analog voltage amplitude frequency domain sequence obtained through measurement; the FFT is carried out on acceleration analog signals obtained through measurement during a test, then a dynamic calibration function is adopted for correction, the IFFT operation is carried out after correction is carried out, and finally calibrated and measured acceleration time domain data can be obtained. According to the high-precision dynamic calibration method, dynamic amplitude-frequency response characteristic calibration is carried out on the quartz flexible accelerometer, non-linear errors can be corrected, and the high-precision dynamic calibration method is effective and can achieve the purpose that the measurement precision of the quartz flexible accelerometer within the frequency range is ensured.
Owner:LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
Online dynamic calibrating method for errors of inner and outer lever arms of two rotary inertial navigation systems
ActiveCN108871378ACalibration time is shortSimplify the calibration processMeasurement devicesEngineeringInertial navigation system
The invention discloses an online dynamic calibrating method for errors of inner and outer lever arms of two rotary inertial navigation systems. The method comprises the steps: firstly, establishing measuring models for respective inner lever arms, a measuring model for intersystem outer lever arm errors and a measuring model for intersystem speed difference of the two rotary inertial navigation systems; secondly, realizing a principle and way of separation of the respective inner lever arms of the two rotary inertial navigation systems on the basis of model analysis, and designing a rotationpolicy of the two rotary inertial navigation systems; then, separately controlling frameworks of RINS1 and RINS2 to rotate according to the preset rotation policy, carrying out navigation resolving, and outputting speed information on the two rotary inertial navigation systems; finally, calculating speed difference between the two rotary inertial navigation systems, constructing a Kalman filter bytaking the speed difference as a measurement amount, so as to achieve the online dynamic calibration on the errors of the inner and outer lever arms of the two rotary inertial navigation systems. According to the method, the required calibration time is short, the calibration process is simple, the accuracy in calibration of the inner and outer lever arms is high, the dependence on other outsidereference information is not required, the independence is high, and the implementation is facilitated.
Owner:BEIHANG UNIV
Direct current motor output torque calibration device
ActiveCN109799016AImprove control efficiencyRealize dynamic calibrationWork measurementTorque measurementControl theoryConnection control
The invention discloses a direct current motor output torque calibration device, which is characterized in that an alternating current servo motor, a planetary reducer, a conductive slip ring, a torque sensor and a direct current motor to be calibrated are assembled on a calibration platform, central axes coincide, and the planetary reducer is connected with the alternating current servo motor; one end of the conductive slip ring is connected with an output signal line of the torque sensor, and the other end is connected with a controller; and the controller comprises a direct current motor drive current measuring module, a torque sensor voltage signal measuring module, a motor drive control module and a communication module. In addition, the device can set the servo motor to rotate at a certain speed, and thus the dynamic calibration of the direct current motor is realized. The device has the advantages of simple implementation, convenient operation and high working efficiency, and can accurately calibrate the relationship between the output torque of the direct current motor and the driving current, and thus the control efficiency of the direct current motor is improved, and thecontrol effect of the direct current motor is improved.
Owner:SOUTHEAST UNIV
Dynamic parameter calibration device and method for photoelectric sight-stabilizing system stability measurement device
ActiveCN107515101ARealize dynamic calibrationSolve the problem of dynamic parameter calibrationOptical apparatus testingMeasurement deviceLight beam
The invention discloses a dynamic parameter calibration device and method for a photoelectric sight-stabilizing system stability measurement device. The calibrated photoelectric sight-stabilizing system stability measurement device is fixed onto a photoelectric platform to build a micro-vibration generator, the micro-vibration generator is started, an image acquisition system of the calibrated photoelectric sight-stabilizing system stability measurement device is opened, the positions of self-collimation light spots returned by an optical lens are acquired by the image acquisition system, the positions of reference image light spots are transmitted to a processing computer, vibration frequency and angle offset range of the micro-vibration generator are set, so that light beams entering the optical lens generate offset, the positions of offset image light spots returned by the optical lens are acquired by the image acquisition system, and offset angles of the light spots are calculated. According to the device, the photoelectric sight-stabilizing system stability measurement device is dynamically calibrated, and dynamic parameter calibration of the photoelectric sight-stabilizing system stability measurement device is achieved.
Owner:THE 41ST INST OF CHINA ELECTRONICS TECH GRP
Vehicle-mounted camera calibration method and device, vehicle-mounted camera and storage medium
PendingCN112927309ARealize dynamic calibrationImprove accuracyImage analysisIn vehicleAngular degrees
The embodiment of the invention discloses a vehicle-mounted camera calibration method and device, a vehicle-mounted camera and a storage medium. The method comprises the following steps: acquiring coordinate parameters of left and right lane lines in a world coordinate system from an image acquired by the camera; mapping the left lane line and the right lane line to a customized virtual two-dimensional image according to the coordinate parameters, obtaining the intersection point of the left lane line and the right lane line obtained through mapping, and building a mapping relation between the virtual two-dimensional image and the customized coordinate range of the world coordinate system; combining the M frames of images to obtain N cross points in the virtual two-dimensional image, one frame of image corresponds to one cross point, M and N are positive integers, and N is not larger than M; selecting a target intersection meeting a preset standard from the N intersections; based on a world coordinate system, mapping the target cross point to a camera coordinate system to obtain a calibration reference point; acquiring a deviation angle of the calibration reference point relative to a camera coordinate system; calculating the offset angle of the camera relative to the ground reversely through the intersection point, so that the calculation amount is small, and the accuracy is high.
Owner:SUZHOU O FILM TECH
Torque measuring system special for butt-joint lock driving combination and in-situ calibration method
PendingCN113654697ATorque performance testIn-Situ Calibration ImplementationWork measurementTorque measurementTorque transmissionEngineering
The invention discloses a torque measuring system special for a butt-joint lock driving combination and an in-situ calibration method. The device comprises an upper computer, a torque accurate loading module, a torque overload protection module, a torque measuring module, a torque and rotating speed sensor in-situ calibration module, a torque transmission module, a high and low temperature environment controller, a supporting frame and an experimental platform. In calibration, the torque and rotating speed sensor is calibrated through a standard sensor. In torque measurement, under the temperature of each point, the measurement value of the torque and rotating speed sensor is recorded, and a torque set value is compared with the measurement value of the torque and rotating speed sensor, so that the torque output of the lock-joint driving combination under the measurement point can be obtained, and the test of the lock-joint driving combination is completed. According to the system and method of the invention, the torque and rotating speed sensor can be calibrated without being dismounted, and the output torque characteristic of the lock-joint driving combination can be measured at the high and low temperature of-70 DEG C to 100 DEG C.
Owner:SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
Dynamic calibration method and system for vehicle-mounted geomagnetic sensor
ActiveCN113074752ARealize dynamic calibrationSimplify the calibration processNavigation by terrestrial meansIn vehicleLongitude
The invention provides a dynamic calibration method and system for a vehicle-mounted geomagnetic sensor. The method comprises the following steps: firstly, analyzing the latitude, longitude and altitude of a current geographic position of a vehicle from a GPS signal, then obtaining a reference geomagnetic induction intensity under an east-north-sky coordinate system by an IGRF model, introducing vehicle attitude information from a vehicle attitude measurement system, and then obtaining a geomagnetic reference value under a current vehicle attitude vehicle coordinate system; and carrying out recursive least square iteration solution on the geomagnetic reference value and a geomagnetic sensor measurement value to obtain a geomagnetic sensor calibration parameter. Calibration of error parameters of the vehicle-mounted geomagnetic sensor can be realized, a real geomagnetic sensor measurement value is obtained after error compensation is carried out on a geomagnetic sensor measurement value interfered by the outside world, meanwhile, the method is not limited by the geographic position of the vehicle, and when the geomagnetic induction intensity is obviously changed due to the change of the position of the vehicle, an error parameter calibration process can be dynamically completed in real time.
Owner:TSINGHUA UNIV
On-line calibration system and method of PM2.5/PM10 light scattering particulate matter monitor
ActiveCN109765154AAchieving self-calibrationRealize dynamic calibrationParticle suspension analysisParticulatesFrequency conversion
The invention discloses an on-line calibration system and method of a PM2.5 / PM10 light scattering particulate matter monitor. The on-line calibration system consists of a particulate matter dynamic dilution and laminar flow mixer, a high efficiency filter, an air compressor, a frequency conversion fan, a mass flow controller, a constant speed sampling head, a particulate matter filter membrane collector and a constant current sampler. The on-line calibration system and method can calibrate the zero point, linearity and indication error of an instrument, eliminate the influences of environmental factors on the measurement results, and ensure the traceability and reliability of the measurement results. The calibration system and method can be integrated into a light scattering particle monitor, and can also be used as an independent calibration system to realize self-calibration, dynamic calibration and current calibration of the light scattering particle monitor.
Owner:NAT INST OF METROLOGY CHINA
Radar's criterion module
InactiveCN107064891AImprove detection accuracyRealize dynamic calibrationRadio wave reradiation/reflectionICT adaptationPhysicsVIT signals
The invention discloses a radar's criterion module, comprising: a receiver component used to receive a radar radiation signal and to carry out AD sampling treatment on the radar radiation signal to obtain a sampling signal; and a signal processing module configured to be connected with the receiver component and a storage module so as to process the sampling signal and to transmit the obtained emission spectrum characteristics to the storage module to be stored. The signal processing module configures the trigger delay time according to the received instruction and generates a criterion signal with a preset pulse width. The criterion signal is synchronous with the pulse repletion frequency of the radar signal, and is started at the preset pulse width prior to the next sampling time point of the radar. The radar's criterion module overcomes the problem in the prior art that the standardizing and effecting is impossible, and the dynamic criterion of a radar signal can be realized, which increases the radar detection accuracy.
Owner:WUHU HANGFEI SCI & TECH
Calibration Method of Emission Characteristic Curve of Cathode Filament of X-ray Generator
The invention provides a calibration method for a cathode filament emission characteristic curve of an X-ray generator, and belongs to the technical field of X-ray generators. The calibration method comprises: in a practical operation process of an X-ray generator, setting filament current based on a first cathode filament emission characteristic curve, and generating X-rays through operation of the X-ray generator, and acquiring actual bulb current corresponding to the filament current, and using the filament current and the actual bulb current to dynamically calibrate the first cathode filament emission characteristic curve, to update to a second cathode filament emission characteristic curve. The calibration method can make the cathode filament emission characteristic curve dynamically calibrated, and the cathode filament emission characteristic curve is more accurate, and the setting of the bulb current is more accurate.
Owner:RAYCO SHANGHAI MEDICAL PROD
Alignment calibration system based on Beidou
InactiveCN107315174APracticalAchieve strengthSatellite radio beaconingRadio wave reradiation/reflectionRadarVIT signals
The invention discloses an alignment calibration system based on the Beidou. The system comprises an antenna servo device, an emitting cabinet, a receiving cabinet and a control terminal. The emitting cabinet is connected to the antenna servo device so as to emit a signal through the antenna servo device. The receiving cabinet is connected to the antenna servo device so as to receive an echo signal corresponding to the emission signal. The criterion source or the noise source is coupled to the echo signal and amplification and amplitude limiting processing is performed on the coupled signal. The control terminal is connected to the receiving cabinet so as to control the criterion source or the noise source to be coupled into the signal and displays the processed signal. According to the invention, the problem that the radar in the prior art fails to carry out dynamic calibration is solved and dynamic calibration of the Beidou signal is achieved.
Owner:WUHU HANGFEI SCI & TECH
Dynamic calibration system and method of torque and rotating speed measuring device
PendingCN111811565ARealize dynamic calibrationAccurate and reliable valueMeasurement apparatus componentsStatic/dynamic balance measurementControl systemCoupling
The invention discloses a dynamic calibration system and method of a torque and rotating speed measuring device. The system comprises a controllable driving device, a standard torque and rotating speed measuring device, a calibrated torque and rotating speed measuring device and a variable load which are sequentially arranged and coaxially installed. Winding couplers are installed between the standard torque and rotating speed measuring device and the calibrated torque and rotating speed measuring device and between the calibrated torque and rotating speed measuring device and the variable load respectively. And the controllable driving device, the standard torque rotating speed measuring device and the variable load are all electrically connected with a data acquisition and analysis control system. In the invention, indication values of the standard torque rotating speed measuring device and the calibrated torque rotating speed measuring device are compared to realize quantity value calibration; and dynamic synchronous calibration of torque and rotating speed parameters is completed through one-time installation, calibration time is greatly shortened, a problem that the calibration state and the actual use state of a calibrated instrument are inconsistent is solved, and accuracy and reliability of torque and rotating speed parameter values are guaranteed.
Owner:常州检验检测标准认证研究院
Radar calibration system
InactiveCN107271972AImprove detection accuracyOvercome the problem of inefficiencyRadio wave reradiation/reflectionICT adaptationMeteorologyCommunication interface
The invention discloses a radar calibration system which comprises a calibration module and radar equipment, wherein the radar equipment is provided with a plurality of communication interfaces. The calibration module is connected with the communication interfaces. The radar equipment performs communication and monitoring on the calibration module through the communication interfaces. The radar calibration system has advantages of overcoming a problem of incapability of calibrating meteorological radar in prior art, realizing dynamic calibration of a radar signal and improving radar detection precision. The calibration module is wholly utilized in the radar field, thereby improving calibration accuracy.
Owner:WUHU HANGFEI SCI & TECH
Method and system for automatically calibrating sensitivity of touch detection, and touch control terminal
ActiveCN101751179BGuaranteed accuracyGuaranteed linearityInput/output processes for data processingCurrent channelSignal on
Owner:SHENZHEN GOODIX TECH CO LTD
Calibration platform and calibration method for six-dimensional acceleration sensor
InactiveCN102680739BEasy to assemble and disassembleStable jobTesting/calibration of speed/acceleration/shock measurement devicesGear wheelReciprocating motion
The invention discloses a calibration platform and a calibration method for a six-dimensional acceleration sensor, and belongs to the field of multidimensional acceleration sensors or strap-down inertial navigation. Two horizontal turntables with cylindrical pins drive two sliding platforms with sliding chutes to reciprocally move along own guide rails respectively. Two gears are arranged on one sliding platform, and the end faces of rotating shafts fixedly connected to the gears are connected with a standard acceleration sensor and the six-dimensional acceleration sensor to be calibrated through inclined blocks respectively. A rack is arranged on the other sliding platform. A fine adjustment mechanism can be used for adjusting distances between the gears and the rack. The six-dimensional acceleration sensor can be comprehensively calibrated in different working modes by controlling the fitting and separation states of the gears and the rack and the running and stopping states of two motors.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Dynamic calibration method for linearity of collision force measurement force sensor
InactiveCN111024306ALinearity achievedRealize dynamic calibrationForce/torque/work measurement apparatus calibration/testingShock testingClassical mechanicsEngineering
The invention discloses a dynamic calibration method for the linearity of a collision force measurement force sensor. The implementation method comprises the steps that the head installation positionof the variable-mass trolley is adjusted till the collision face is perpendicular to the ground; fixing a standard sensor and a sensor to be calibrated on the iron plough plate embedded in the collision wall in a back-to-back manner, so that the collision bearing surface is parallel to the collision surface of the trolley, and the centers of the collision bearing surface and the collision surfacecoincide; installing the end head with the buffer pad on the sensor to be calibrated; setting a collision mass and collision speed range to form m groups of test working conditions with unchanged collision mass and speed from small to large; the trolley is connected with the traction system to realize the set test, and output signals of the two sensors are synchronously acquired; fitting data in astraight line; calculating a nonlinear deviation maximum value under a certain collision mass according to the fitting equation, and calculating the linearity of the sensor under the collision mass according to the nonlinear deviation maximum value; changing the collision mass, repeating the above steps, and obtaining the linearity and linearity relation under different collision masses, therebyrealizing the dynamic calibration.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com