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12results about How to "Guaranteed measurement reliability" patented technology
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Confocal microscope camera calibration method based on high-precision motion control
ActiveCN119478061Aremove distortionaccurate mappingImage analysisInternal combustion piston enginesImage planePhysics
The invention discloses a confocal microscope camera calibration method based on high-precision motion control. The confocal microscope camera calibration method mainly comprises the steps of establishing four coordinate systems, placing a checkerboard calibration plate on a high-precision platform and adjusting the checkerboard calibration plate to the center of the view of a camera, and shooting and recording image coordinates of a calibration point. And based on the imaging relationship between the optical center of the camera and the object point, determining the mapping relationship between the coordinate systems so as to establish a preliminary imaging model. Then, nonlinear correction is performed on the imaging model, lens distortion is eliminated, and corrected image coordinates are converted into pixel coordinates. The non-linear correction parameters are optimized through the multi-view data, the mapping relation between the image plane and the platform physical plane is further calculated, and the mapping relation is optimized through the least square method so as to improve the calibration precision. Finally, pixel coordinates in the image are converted into physical coordinates of a platform through the optimized matrix, and support is provided for the automatic focusing process of the confocal microscope.
Owner:NANJING MUMUSILI TECH CO LTD +2
Drainage pipe network pollutant tracing method and system based on multi-level monitoring and medium
PendingCN119475005AWide coverageGuaranteed measurement accuracyFluorescence/phosphorescenceMaterial resistanceWater qualityEnvironmental engineering
The invention provides a drainage pipe network pollutant tracing method and system based on multi-level monitoring and a medium, and the method comprises the following steps: obtaining sampling data which is periodic data; inputting the sampling data into a trained water gene diagnosis model to obtain a diagnosis result; a target result is extracted based on the diagnosis result, so that target monitoring data are obtained based on the conductivity monitoring equipment of the drainage subarea corresponding to the target result, and the target result comprises that it is determined that the drainage subarea is polluted; and identifying a final target area based on the target monitoring data, wherein the target area comprises a pollutant source area. According to the drainage pipe network pollutant traceability method and system based on multi-level monitoring and the medium, through a low-cost efficient monitoring network, a wider area can be covered, more comprehensive water quality monitoring is achieved, the water quality problem can be found and solved in time, and the water quality monitoring efficiency is improved. And the overall operation and maintenance cost is reduced while the measurement precision and reliability are ensured.
Owner:SHANGHAI INVESTIGATION DESIGN & RES INST CO LTD +1
Optical system distortion measuring device and method based on rotary biprism
ActiveCN119198013Aavoid motion errorsavoid security risksGeometric properties/aberration measurementGrismLinear motion
The invention discloses an optical system distortion measuring device and method based on a rotary biprism, and belongs to the technical field of optical system measurement, a two-dimensional linear motion mechanism and a rotary biprism assembly are adopted to replace a multi-dimensional rotary table to achieve view field change, light beam translation and light beam deflection control, and motion errors of the multi-dimensional rotary table are avoided; the two-dimensional linear motion mechanism realizes the translational motion of the collimator, and the collimator does not need to be subjected to pitching state change, so that the safety risk caused by the pitching angle change of the collimator is avoided; the parallel light beam deflection control device has the advantages of being compact in structure, small in rotational inertia, capable of achieving large-angle deflection of large-aperture light beams and the like, and the measurement precision and reliability are improved.
Owner:SICHUAN ZHONGFEI HECHUANG TECHNOLOGY CO LTD
Reliability assessment method and system for tissue elasticity measurement
ActiveCN118975822BGuaranteed measurement reliabilityreduce mistakesImage analysisOrgan movement/changes detectionTissue elasticityRadiology
The present invention discloses a reliability assessment method for tissue elasticity measurement, including obtaining ultrasonic information of the measured tissue and obtaining a shear wave propagation trajectory map of the measured tissue based on the ultrasonic information; extracting features of the ultrasonic information and features of the shear wave propagation trajectory map; calculating an ultrasonic information feature score based on the features of the ultrasonic information and the weight of each feature of the ultrasonic information, and calculating a shear wave trajectory map feature score based on the features of the shear wave trajectory map and the weight of each feature of the shear wave trajectory map; and calculating a score representing the elasticity measurement result of the measured tissue based on the ultrasonic information feature score and the shear wave trajectory map feature score. By combining ultrasonic information and shear wave propagation features, a more comprehensive tissue elasticity assessment can be provided, providing a multi-dimensional evaluation, reducing the errors that may be caused by single feature characterization, improving the accuracy of the score, and thus being able to effectively reflect the measurement quality and credibility, helping doctors judge the reliability of the results.
Owner:EIELING TECHNOLOGY (SHENZHEN) LTD
A precision capacitance sensing system and sensing method
PendingCN122083998ABreaking through the performance bottleneck of high-precision capacitive sensingEliminate measurement errorsConverting sensor output electrically/magneticallyDigital function generatorsCapacitanceTransformer
This application discloses a precision capacitance sensing system, comprising a modulation signal source, a sensitive probe, a differential transformer bridge, a signal amplification link, an analog multiplier, and a low-pass filter circuit, all connected in sequence. It also includes a demodulation reference signal source, the output of which is connected to the second input of the analog multiplier. The demodulation reference signal source is used to generate a multi-frequency combination demodulation reference signal, which is composed of a fundamental frequency component and at least two harmonic components superimposed. This invention also discloses a precision capacitance sensing method. By employing a specially designed demodulation reference signal, this application ensures that the system output remains constant within a continuously varying range of the demodulation phase difference, thereby achieving complete insensitivity to phase difference fluctuations and effectively overcoming the performance bottleneck that has long constrained high-precision capacitance sensing.
Owner:CHINESE PEOPLES LIBERATION ARMY INFORMATION SUPPORT CORPS ENGINEERING UNIVERSITY
A MEMS sensor and electronic device
The application discloses a MEMS sensor and an electronic device, wherein the MEMS sensor comprises a base, the base comprises a bottom plate, the bottom plate is provided with a first ventilation channel and an equalizing channel penetrating through the bottom plate, and the first ventilation channel and the equalizing channel are independent of each other; a cover body is fixedly connected with the base and jointly encloses the accommodation cavity with the base, the cover body is provided with a second ventilation channel; a MEMS chip is located in the accommodation cavity and is fixedly connected with the bottom plate and covers the opening of the first ventilation channel in the accommodation cavity; wherein the flow resistance of the equalizing channel to gas is greater than that of the first ventilation channel and also greater than that of the second ventilation channel. In the application, when the second ventilation channel is blocked by impurities such as dust and oil mist, the accommodation cavity can be communicated with the outside through the equalizing channel, so that the air pressure in the accommodation cavity is rapidly balanced, the signal anomaly caused by the complete sealing of the accommodation cavity is avoided, and the measurement accuracy and reliability of the MEMS sensor are effectively ensured.
Owner:MEMSENSING MICROSYST SUZHOU CHINA
Gravity meter device
ActiveCN222319150ULess preparationImprove measurement efficiencyGravitational wave measurementGps receiverControl theory
The gravimeter device comprises a supporting bottom plate, a gravimeter body arranged on the supporting bottom plate, a UPS (Uninterrupted Power Supply), a GPS (Global Positioning System) receiver and an industrial control computer, the UPS is electrically connected with the gravimeter body, the GPS receiver and the industrial control computer respectively; the industrial control computer is in communication connection with the gravimeter body, and the gravimeter body is in communication connection with the GPS receiver; in the length direction of the supporting bottom plate, the gravimeter body and the UPS are arranged side by side, and the GPS receiver and the industrial control computer are arranged side by side. In the width direction of the supporting bottom plate, the gravimeter body and the GPS receiver are arranged in parallel, and the UPS and the industrial control computer are arranged in parallel; carrying handles are arranged at the two opposite ends of the supporting bottom plate in the length direction of the supporting bottom plate. Positioning mounting structures are arranged at the two opposite ends of the supporting bottom plate in the width direction of the supporting bottom plate. According to the scheme, live keeping of the whole device in the transportation process is guaranteed, and preparatory work of equipment is reduced.
Owner:HUNAN AINES TECH CO LTD
Device for measuring roundness of inner and outer steel rings of bearing
ActiveCN224189215Ulow costThe linkage drive structure is simple and effectiveMachine supportsMeasurement devicesControl theoryMechanical engineering
Owner:JIANGXI ZHUODA BEARING CO LTD
Oil nozzle for measurement, oil injector and oil nozzle bulb temperature peak value measurement method
PendingCN119593919AReduce processing difficultyReduce the difficulty of assemblyEngine testingFuel injection apparatusInjector nozzlePetroleum engineering
The oil nozzle comprises an oil nozzle body, an oil nozzle ball head is arranged at the front end of the oil nozzle body in a protruding mode, a spraying hole communicated with the outside is formed in the oil nozzle ball head, at least one containing cavity is formed in the position, close to the spraying hole, of the front end of the oil nozzle body, and the containing cavity is filled with a sensing part with the temperature-hardness sensitive characteristic. And the sensing part is matched with the accommodating cavity in shape. The invention further discloses a fuel injector using the fuel injection nozzle for measurement. The invention further provides a measuring method for measuring the temperature peak value of a ball head through the fuel injection nozzle. The invention has the advantages of high measurement accuracy and reliability, simple test piece structure and short manufacturing period.
Owner:CUMMINS FUEL SYSTEMS (WUHAN) CO LTD
Method for process phase identification of ultrahigh pressure vessels based on non-invasive temperature monitoring
The application discloses a kind of based on non-invasive temperature monitoring's superhigh pressure container process phase identification method, it is related to superhigh pressure container monitoring technical field.The upper end cover of the working cylinder body of the superhigh pressure container is installed with at least two temperature sensors in non-pressure area, and the lower end cover is also installed with at least two temperature sensors in non-pressure area;The method comprises the following steps: synchronously collecting the temperature time series data of each temperature sensor;Extracting multidimensional temperature feature vector from the temperature time series data, the multidimensional temperature feature vector includes: the instantaneous temperature difference between the upper end cover and the lower end cover measuring point, the temperature change rate of the upper end cover and the lower end cover measuring point respectively, and the time series lag feature of the temperature response of the upper end cover and the lower end cover measuring point;Based on the multidimensional temperature feature vector, the current process phase is identified, and the process phase includes at least one of the pressurization stage, the pressure maintaining stage, the pressure relief stage and the cycle stage.
Owner:CISRI HIPEX TECHNOLOGY CO LTD +1
Three-way displacement mechanism
ActiveCN222560886UAccurate monitoringaccurate collectionSubsonic/sonic/ultrasonic wave measurementUsing electrical meansGear driveElectric machine
The utility model discloses a three-way displacement mechanism, which relates to the technical field of precision measurement and comprises a data acquisition system and a fixing block. The fixing block is made of metal materials, a through groove is formed in the fixing block, and three connectors are connected to the fixing block. According to the utility model, the linear transformer differential sensor is combined with the laser vibration meter to accurately monitor and collect the position and vibration data of each part of the engine in the test process, simultaneously measure the displacement along the X axis, the Y axis and the Z axis, and transmit the measured data to the data acquisition system; during testing, the driving motor drives the gear to operate, the coordinate axis is adjusted, the gear drives the teeth on the X axis, the Y axis and the Z axis, so that the X axis, the Y axis and the Z axis move towards the negative coordinate axis through the through grooves, parts of various shapes and sizes are arranged in the engine, and the adjustable coordinate axis enables the testing device to adapt to different requirements of the parts.
Owner:HUNAN SHIZUOKA ELECTROMECHANICAL CO LTD
A method and system for calibrating an oscillating high voltage generator
PendingCN122506464AGet total parameter information in real timeImprove parameter identification capabilities
This application provides a calibration method and system for an oscillating high-voltage generator. The method includes: determining the product parameter between the total inductance and total capacitance of the oscillating circuit based on the interval between adjacent peaks, and determining the total damping parameter of the oscillating circuit based on the attenuation characteristics; performing thermal correction on preset generator reference parameters based on the generator thermal characterization parameters to obtain the generator thermal parameters; separating the oscillating circuit parameters into cable equivalent capacitance, cable equivalent loss parameters, and generator parameters; performing energy storage safety verification on the cable equivalent capacitance; generating a pre-charge voltage setting value for the next excitation based on the cable equivalent capacitance when the energy storage is within limits; correcting the generator control parameters for the next excitation based on the generator parameters; generating a correction amount based on the current first peak voltage deviation; and combining the pre-charge voltage setting value, generator control parameters, and correction amount according to the amplitude limiting conditions to form a control calibration parameter group for the next pre-examination excitation. This application achieves real-time compensation for generator thermal drift and identification of cable parameters, avoiding calibration deviation problems caused by generator thermal losses.
Owner:HENAN PROVINCE INST OF METROLOGY