53results about How to "Improve Calibration Accuracy" patented technology

The present disclosure provides a kind of calibration method, device, equipment, medium and product for telecentric camera.The present disclosure relates to the field of optical measurement, and the calibration method for telecentric camera includes: based on the multiple calibration images obtained by using the telecentric camera to be calibrated to calibrate board image acquisition, using beam adjustment method determines the initial calibration parameter of telecentric camera to be calibrated;The three-dimensional reconstruction is carried out to the calibration board using initial calibration parameter, and the initial reconstruction coordinates of multiple calibration points on the calibration board in world coordinate system are obtained;Based on the absolute coordinates of multiple calibration points in world coordinate system and initial reconstruction coordinates, the initial reconstruction deviation of multiple calibration points is determined;With initial reconstruction deviation as initial value, with minimizing the coordinate deviation and distance deviation of multiple calibration points as target, the initial calibration parameter is optimized using nonlinear optimization method, and the target calibration parameter of telecentric camera to be calibrated is obtained.

This invention discloses a fully automated atmospheric and topographic radiometric correction method and device for high-resolution remote sensing imagery, belonging to the field of remote sensing science and technology. The method includes: constructing a fully automated batch processing framework; developing an atmospheric correction module based on the 6S radiative transfer model to automatically retrieve atmospheric parameters and eliminate their influence; and developing a topographic radiometric correction module based on the digital elevation model (DEM) and VECA model to compensate for radiometric distortion caused by complex terrain. The key innovation lies in constructing a joint correction framework and integrating a geomorphic feature recognition algorithm, which can automatically identify and select to execute either single atmospheric correction or a combined atmospheric-topographic correction process based on the degree of topographic relief in the image. This invention achieves fully automated batch processing from data input to result output, requiring no manual intervention, significantly improving the processing efficiency, intelligence level, and adaptability to different terrain scenarios in high-resolution image radiometric correction.

The application discloses a kind of modular configurable tooling detection methods, belong to tooling detection field, specifically include: module configuration step, automatic detection step, detection result processing step.Before detection, detection group leader configures detection hardware according to detection plan, software platform.When the unit to be detected is placed in the area to be detected, detection personnel start main control machine, and start automatic detection process according to the configuration parameters of detection scheme module, detection strategy module and detection alarm module after authentication.After detection, whether the detection data is entered into database according to the parameters configured by data analysis module is processed by main control software;Whether detection report is saved or printed;The application is adapted to the detection needs of the unit to be detected constantly upgrading iteration by the modularization and configurability of detection hardware and software platform, and the problem that error reproduction is difficult, error chain is deep and difficult to locate is solved by error tracing module.

The application discloses a suspended ceiling profile calibration welding equipment and relates to the technical field of welding. The equipment comprises a welding mechanism, a feeding mechanism and a calibration mechanism. The welding mechanism and the feeding mechanism are installed on a rack. The welding mechanism, the feeding mechanism and the calibration mechanism are in electrical communication with a control system circuit. The calibration mechanism comprises a pair of traction assemblies and a calibration circuit. The pair of traction assemblies are symmetrically arranged in the rack. Each traction assembly comprises a steel cable, a winding machine and a support machine. The steel cable is connected between the winding machine and the support machine. The support machine is arranged outside the rack. The calibration circuit comprises a pair of sliding variable resistance elements. The pair of sliding variable resistance elements are respectively arranged in the pair of winding machines. The feeding mechanism and the welding mechanism work cooperatively to realize automatic feeding, positioning and peripheral welding. An operator only needs to simply control to complete a plurality of welding, thereby guaranteeing uniform and consistent welding seams, improving welding speed and product quality and being applicable to batch and on-site rapid construction requirements.

The application provides a direct current offset correction circuit based on a lookup table, a zero intermediate frequency receiver and a direct current offset correction method based on a lookup table. The direct current offset correction circuit based on a lookup table comprises a storage module, an analog coarse correction module and a digital fine correction module. In the receiving channel of the zero intermediate frequency receiver, the analog coarse correction module is used to perform analog coarse correction on the direct current offset in the analog signal, and the digital fine correction module is used to perform digital fine correction on the direct current offset in the digital signal. The analog intermediate frequency correction and the digital baseband correction are considered, and the correction precision of the direct current offset is improved. Meanwhile, the direct current offset correction lookup tables generated by radio frequency and intermediate frequency devices are separately established. During correction, indexing and operation are performed based on the analog coarse correction module and the digital fine correction module. Only a small number of calculation input correction parameters need to be saved, the total capacity of the lookup table is reduced, and the storage load of the storage module is reduced.

The application discloses a kind of power grid line tower coordinate verification method, device and computer equipment, it is related to power grid technical field, mainly in can improve the verification efficiency and verification accuracy of tower coordinate.The method includes: obtaining the tower GPS coordinates corresponding to different towers on target power grid line, wherein different towers include target to be verified tower, and determine the obstacle GPS coordinates corresponding to different obstacles in the preset range with target to be verified tower as center;Determine the tower span between two adjacent towers in different towers based on tower GPS coordinates;Based on obstacle GPS coordinates and target GPS coordinates corresponding to target to be verified tower, determine longitude reference obstacle and latitude reference obstacle in different obstacles;Based on tower span, target GPS coordinates, reference longitude coordinate value corresponding to different longitude reference obstacles, reference latitude coordinate value corresponding to different latitude reference obstacles, the target GPS coordinates of target to be verified tower are verified.

The application provides a cross-clock domain time information correction method and a distributed system thereof. The method comprises the following steps: a sub-node sends a digital signal carrying its own clock and data information to a master node, and then the master node recovers the sub-node clock and data; the master node is configured with a sub-node clock counter and a master node clock counter; the master node samples one clock by using the other clock, and when the lag time between the two clocks reaches a single period of the clock with a higher frequency, the sub-node clock counter is adjusted to keep the two clock counters consistent; and the time stamp of the data of the sub-node in the master node clock domain is obtained through the sub-node clock counter and the master node clock. The application has a simple structure, saves the calculation cost, and has high time measurement precision.

The utility model relates to a kind of helicopter pressure gauge tester, including shell, air pressure pump, trim pump and partial pressure chamber, shell inside is separately provided with air pressure pump, trim pump and partial pressure chamber, the input end of air pressure pump is connected with shell outside, the output end of air pressure pump is connected with the input end of trim pump, stop valve is set on the communication pipeline between air pressure pump and trim pump, the first output end of trim pump is connected with the input end of partial pressure chamber, the first output end of partial pressure chamber is provided with first connecting port, to-be-measured pressure sensor is electrically connected with to-be-measured pressure gauge by cable, shell is provided with single item ac 220V power socket, the second output end of partial pressure chamber is provided with second connecting port, the utility model can effectively solve the problem that pressure detection instrument is used multiple times, and improve calibration accuracy.

This invention provides a calibration method and system for a clock chip. The method includes: collecting environmental data of the clock chip and calculating feature values ​​of the environmental data; determining environmental state classification based on the feature values ​​and loading a personalized compensation model for the clock chip; mapping the environmental state classification to the system state of the clock chip; executing the calibration scheme; determining control parameters during the calibration process based on real-time environmental data and the personalized compensation model; determining whether convergence has occurred based on the control parameters; and collecting calibration performance indicators if convergence has occurred; and evaluating the calibration quality based on the environmental records of the calibration process and the calibration performance indicators.

The invention relates to the technical field of machine tool parts, in particular to a cross beam device which comprises a cross beam body, a cross beam stand column is fixedly arranged at the lower end of the cross beam body, a cross beam deflection correction mechanism is arranged in the cross beam body and comprises suspension beams, suspension beam stand columns, pull rods and adjusting nuts, and the suspension beams are arranged on the two sides in the cross beam body in the length direction of the cross beam body. The cantilever is made of flexible materials, cantilever stand columns are arranged at the two ends of the cantilever respectively, the lower ends of the cantilever stand columns are fixedly connected with a bottom plate of the cross beam body, a pull rod is arranged between the cantilever and the bottom plate of the cross beam body, the lower end of the pull rod is fixedly connected with the bottom plate of the cross beam body, and the upper end of the pull rod penetrates out of the cantilever and is provided with an adjusting nut. The beam body comprises a top plate, a bottom plate and side plates. The beam is simple in structure, few in component and free of occupying the upper space of the beam, deflection deformation of different positions of the beam can be corrected respectively, correction precision is high, and correction is rapid and convenient.

This invention discloses a single-shot shock wave velocity measurement system and method with timing calibration capability. The single-shot shock wave velocity measurement system includes a target chamber, a probe laser generation module, a timing calibration target, an interferometer, a streak camera, a focusing lens, a timing laser introduction module, and multiple main laser generation modules. During the timing calibration of the single-shot shock wave velocity measurement system, a customized timing calibration target reflects the main laser signal and the probe laser signal along the same optical path. A focusing lens is used to improve the signal-to-noise ratio. Simultaneously, a dedicated timing laser transmission component introduces the timing laser signal into the slit of the streak camera. This allows for the simultaneous acquisition of the main laser signal, the probe laser signal, and the timing laser signal in a single-shot measurement, achieving in-situ precise timing calibration for a velocity measuring instrument corresponding to any reflective surface.

The utility model relates to a kind of oil surface thermometer calibration device, and the utility model relates to thermometer calibration technical field, one mounting plate is located in box;The bottom of one mounting plate is equipped with lifting mechanism;Semiconductor refrigeration sheet is fixed on one mounting plate;Semiconductor refrigeration sheet is connected with external power supply;Thermal conduction calibration block is located on semiconductor refrigeration sheet, and is equipped with placing hole on thermal conduction calibration block;Placing mechanism is equipped on the left side of box;Clamping mechanism is equipped on the right side of box;Fixed mechanism is equipped below clamping mechanism, fixed groove is opened on the box, and fixed mechanism is equipped in fixed groove;Thermal conduction calibration block and semiconductor refrigeration sheet cooperate, without oil immersion, can simulate calibration temperature, avoid oil pollution probe of oil surface thermometer;Adapt to probe of different lengths, ensure that probe and thermal conduction calibration block are closely contacted in calibration process, improve calibration precision, guarantee the stability of calibration environment.

This application provides a method, apparatus, and device for azimuth angle calibration of UWB base stations based on auxiliary base stations. The method includes: determining multiple target areas of a target scene during the movement of the auxiliary base station, wherein the auxiliary base station satisfies constraints with at least two UWB base stations when it is in a target area; for each target area, acquiring target angle measurement data corresponding to at least two UWB base stations corresponding to the target area, determining the relative angle relationship between the azimuth angles of at least two UWB base stations based on the target angle measurement data; and calibrating the azimuth angles of multiple UWB base stations in the target scene based on the relative angle relationship between the azimuth angles of at least two UWB base stations corresponding to each target area. This technical solution automatically calibrates the azimuth angles of multiple UWB base stations, with simple calibration operation, high calibration accuracy, and high calibration efficiency.

The application belongs to the technical field of gyroscopes, and discloses a gyroscope position calibration method and system, the method comprising: applying angular velocity excitation to the gyroscope, obtaining the theoretical rotation angle of the gyroscope at a plurality of sampling positions in a rotation period; recording the arrival time of the gyroscope rotating to each sampling position; determining the actual rotation angle at each sampling position according to the angular velocity excitation, the preset initial error term of the gyroscope and the arrival time at each sampling position; constructing the cost function of the error term based on the actual rotation angle and the theoretical rotation angle at each sampling position; and solving the cost function of the error term based on an optimization algorithm to calibrate the preset initial error term and obtain the calibrated error term. The application solves the constructed cost function of the error term by using the optimization algorithm, calibrates the preset initial error term, and has high calibration accuracy, low test time consumption and high calibration efficiency.

This invention relates to the field of geological exploration, and in particular to a method and apparatus for correcting well logging acoustic velocity to VSP velocity trends. The method includes the following steps: acquiring well logging data and VSP data; preprocessing the well logging data and VSP data; determining the number of nodes in the input layer based on the feature count of the well logging data and VSP data; determining the number of hidden layers and the number of neurons in each layer based on the complexity of the problem and the characteristics of the well logging data and VSP data, thereby constructing a neural network model; training the neural network model; and inputting the well logging data to be corrected into the neural network to obtain the correction result. This invention improves the reliability of data support during modeling and imaging, and enhances the accuracy of modeling and imaging.

The application relates to the technical field of data processing, and discloses a forestry carbon sink satellite remote sensing data correction method. The method is based on a satellite transit time window to implement multi-source time synchronization collection on satellite-borne, airborne and ground measured data, combines micro-meteorological data, digital elevation model data and crown laser radar data to simulate carbon sinks at different elevations at a single time point, and completes simulation correction through remote sensing radiation transmission coupling and eddy correlation data assimilation; further, according to the deviation of measured values and simulated values at different elevations, elevation-specific correction parameters are calculated, a three-dimensional correction parameter field of space-time-elevation is constructed and is adaptively updated; and finally, the correction parameters are used to uniformly correct, weightedly fuse and optimize residuals of satellite-borne data and airborne data. The application can improve the correction accuracy, spatial adaptability and processing efficiency of multi-source forestry carbon sink detection data under complex terrain conditions.

A temperature noise correction method for CMOS space cameras based on attention mechanisms and LSTM is presented. This method relates to the field of optical remote sensing technology, specifically to the field of temperature noise correction for CMOS space cameras. The core of the method is the use of a multi-level Long Short-Term Memory (LSTM) network with an attention mechanism to explore how temperature changes affect the noise performance of CMOS space cameras under two different operating conditions: dark and bright fields. This deep learning model possesses powerful autonomous learning capabilities, capable of mining and understanding complex noise patterns hidden within massive amounts of data, thereby improving the accuracy of noise identification and calibration. Its key advantage lies in its end-to-end learning approach, automatically learning and establishing a deep, nonlinear relationship between temperature and noise directly from the raw data, without requiring manual intervention for feature extraction or designing complex correction algorithms. This significantly enhances the model's generalization ability and adaptability to unseen data scenarios.

The utility model discloses a kind of dozer pitch angle detection devices, including discharge arm, rack platform, inclination sensor, positioning mechanism, bolt-screw hole structure, the rack platform is fixedly installed on the discharge arm by bolt-screw hole structure, the inclination sensor is installed on the rack platform by positioning mechanism, the inclination sensor is connected with general control cabinet electric telecommunication. The function of the utility model is to reduce or avoid the deformation of machine shell when calibration by rack platform, positioning mechanism, improve its calibration accuracy, and the precision of adjustment and calibration is guaranteed and the vibration of inclination sensor machine shell is reduced by the design of scale and shock-absorbing spring.

This utility model discloses an indoor riser tee installation corrector, including a corrector rod. One end of the corrector rod is provided with an auxiliary component, and an adjustment component is connected to the auxiliary cylinder. The auxiliary component on the corrector rod can provide auxiliary restraint during the installation of the auxiliary cylinder, reducing the possibility of displacement of the auxiliary cylinder during the correction process and improving the correction accuracy. At the same time, the adjustment component on the auxiliary component can adjust the size of the adjusting rod according to the usage of the indoor riser tee, meeting the high-precision and multi-scenario installation requirements of the indoor riser tee installation corrector. The mounting seat and spirit level on the corrector rod help improve the levelness of the corrector rod during use, which in turn improves the accuracy of the indoor riser tee installation corrector.

The application discloses an AI-driven 3D NAND flash memory reading voltage self-adaptive optimization method and system, relates to the technical field of data storage, and comprises the following steps: in the feature perception and prediction stage, multi-dimensional feature vectors of 3D NAND flash memory storage units are collected, input into a lightweight AI prediction model, and a predicted voltage interval, an offset direction probability and a prediction confidence are output; in the adaptive decision and optimization stage, according to the comparison result of the prediction confidence and a preset threshold, a corresponding search strategy is selected, scanning is performed in the predicted voltage interval or around the reference voltage, and an optimal reading voltage is determined; in the hierarchical knowledge construction and real-time fine-tuning stage, multi-source voltage data are acquired and dynamically weighted and fused to obtain an initial voltage, local voltage scanning is performed starting from the initial voltage to complete fine-tuning, and if the reading reliability gain after fine-tuning is insufficient, a gradual safety rollback mechanism is started. The application realizes high-precision accuracy of the reading voltage, and reduces the delay and power consumption.

This application discloses a current calibration loop and method for current calibration of a current-controlled DAC. The current calibration loop includes: a selected reference current source and a selected current source to be calibrated; a clamping management module that clamps the output nodes of the two sources to the same fixed potential to discharge the static current of the two output nodes in different calibration modes, retaining only the current difference; an error comparison module that amplifies the current difference into a voltage difference and outputs the comparison result; a calibration control logic module that generates a calibration control signal based on the comparison result; and a calibration module that injects error compensation current into the output nodes according to the calibration control signal, so that the compensated output current of the selected current source to be calibrated is equal to the reference current provided by the selected reference current source. By discharging most of the static current and retaining only the current difference for comparison, it can respond promptly to a wide current range, significantly improve the current calibration accuracy, and adapt to various calibration modes.

The application discloses a multi-channel parallel test system and a self-calibration method for a digital-analog hybrid chip, and relates to the technical field of chip testing. The application discloses a multi-channel parallel test system and a self-calibration method for a digital-analog hybrid chip, and relates to the technical field of chip testing. The application discloses a multi-channel parallel test system and a self-calibration method for a digital-analog hybrid chip, and relates to the technical field of chip testing. The application discloses a multi-channel parallel test system and a self-calibration method for a digital-analog hybrid chip, and relates to the technical field of chip testing. The application discloses a multi-channel parallel test system and a self-calibration method for a digital-analog hybrid chip, and relates to the technical field of chip testing. The application discloses a multi-channel parallel test system and a self-calibration method for a digital-analog hybrid chip, and relates to the technical field of chip testing. The application discloses a multi-channel parallel test system and a self-calibration method for a digital-analog hybrid chip, and relates to the technical field of chip testing. The application discloses a multi-channel parallel test system

The application discloses an interleaved ADC mixed domain adaptive calibration method, device, equipment and medium, relates to the technical field of integrated circuit design, and is used for solving the technical problems of low calibration accuracy and high power consumption in the prior art. The method comprises the following steps: performing cross-correlation calculation on output signals of any two interleaved ADC channels respectively to obtain a plurality of cross-correlation functions; determining time sequence offsets corresponding to the cross-correlation functions according to peak values of the cross-correlation functions respectively; performing multi-channel joint estimation on the time sequence offsets corresponding to the cross-correlation functions to obtain time sequence offsets of the interleaved ADC channels; and performing dynamic calibration on the time sequence offsets of the interleaved ADC channels respectively to obtain calibrated time sequences of the interleaved ADC channels; wherein the dynamic calibration comprises analog domain coarse calibration, digital domain fine calibration and real-time adjustment of a calibration mode. Therefore, the application can improve calibration accuracy, reduce power consumption and the like through technical features such as "signal correlation and dynamic calibration".

The application relates to a scalar in-situ calibration method for a three-axis magnetic field reference source in a magnetic shielding environment, and relates to the fields of weak magnetic measurement and quantum precision measurement. In order to solve the problem that the prior art cannot execute in-situ calibration in a closed environment without complex alignment, the application takes the magnetic field modulus data obtained by a scalar magnetometer as the only input, constructs a global error model, and quantifies the mapping relationship between the coil input current and the actual output magnetic field; taking the minimum residual error between the scalar field measurement value and the model calculation value as the optimization target, the LM algorithm is used to inversely solve the coil actual response matrix and the environmental background magnetic field, and the global compensation of the system error is completed; meanwhile, the magnetic coupling distortion effect of the magnetic shielding boundary is calculated by using the mirror method, the coil geometric size is optimized, the magnetic field uniformity and the boundary magnetization effect suppression are balanced from the design source, and finally the accurate mapping model of the input current and the actual output magnetic field is established. The application calibrates the three-axis coil with high precision.

This invention relates to medical X-ray imaging systems, specifically a method for measuring and calibrating a target in a DSA two-dimensional image when it deviates from its isocenter. The method is achieved through the following steps: 1. Under standard alignment or when the target is isocentered on the DSA machine, acquire and record relevant parameters of the target; 2. After the DSA machine rotates or the examination table moves, and the target deviates from its isocenter, acquire the corresponding parameters used when generating the two-dimensional image, including the machine's X-ray source rotation radius, rotation angle, examination table height and position, and the distance between the target and the table surface. Substitute these parameters into a calibration formula to calculate the calibrated X-ray source-target distance; 3. Calculate the estimated magnification using the calibrated X-ray source-target distance and the X-ray source-detector distance used when generating the two-dimensional image, thereby achieving pixel calibration of the two-dimensional image and ultimately achieving accurate measurement of the target.

This invention discloses a method for calibrating emission permits under fuel composition fluctuations. The invention relates to the field of industrial furnace and kiln pollutant emission control technology and includes the following steps: 1) Data acquisition step: During the operation of the industrial furnace and kiln, the actual elemental composition data of the currently used fuel is collected in real time or periodically through a deployed fuel composition monitoring device. This emission permit calibration method under fuel composition fluctuations establishes a closed-loop feedback mechanism between real-time fuel composition monitoring and dynamic calibration factors, transforming the traditional static accounting system into a dynamic calibration system capable of responding to changes in fuel characteristics. This method dynamically corrects the baseline flue gas volume and performance value based on actual elemental composition data, solving the problem of inaccurate calculations in fixed parameter systems when fuel composition fluctuates, and effectively improving the accuracy and reliability of emission permit calculations.

The application discloses a gyrotron integrated test analysis method, and belongs to the field of high-power microwave device testing. The method designs a steady-state working condition debugging starting point according to a starting current curve; and combines experimental power measurement data to correct a simulated power characteristic surface. The method provided by the application combines theoretical simulation with experimental data, realizes rapid identification and optimization of gyrotron working characteristics, improves debugging efficiency and precision, and is suitable for engineering debugging and operation optimization of an electron cyclotron resonance heating system. The method has the advantages of process standardization, high safety and strong migration, and can improve debugging efficiency, enhance calibration precision and reliability.

This invention discloses an automated blood testing and analysis system. The system includes a control module, an intelligent sample preprocessing module, a sample delivery module, a multi-dimensional blood sample identification module, an integrated blood sample detection module, and a real-time data interaction module. The control module coordinates the operation of each module. The intelligent sample preprocessing module performs blood sample quality screening and centrifugation. The sample delivery module accurately transfers blood samples to the target module through dynamic path planning. The multi-dimensional blood sample identification module collects multi-dimensional feature data of the blood samples. The integrated blood sample detection module completes multiple tests and outputs raw data. The control module calculates correction coefficients based on the feature data to correct the raw data and obtain accurate results. The real-time data interaction module acquires patient medical records and outputs a comprehensive diagnosis and treatment report, while also enabling remote monitoring and fault diagnosis. This invention improves detection efficiency and accuracy through technological improvements such as intelligent preprocessing, dynamic sample delivery, multi-dimensional correction, real-time interaction, and fault diagnosis.