38results about How to "Simplify the calibration process" patented technology

The invention relates to the technical field of semiconductor test equipment, in particular to a full-automatic high-precision probe station, which utilizes multi-physics field coupling sensing and compensation to remarkably improve the positioning precision: by comprehensively collecting multi-physics field data such as a temperature field and a stress field and combining a coupling algorithm to optimize a compensation strategy, multi-factor interference is effectively counteracted, and the accuracy of the probe station is improved. The positioning repetition precision can reach + / -0.05 [mu] m, and the test requirement of the advanced semiconductor technology is met; a dynamic three-dimensional modeling technology and dynamic adaptability enhancement are achieved, a dynamic three-dimensional modeling system with the size affected by multi-physical field data can update the form of a test target in real time, test deviation caused by target deviation or surface fluctuation is avoided, and the adaptability of equipment to a complex test scene is improved. The automation degree is high, the testing efficiency is improved, the whole process of data acquisition, modeling, compensation and testing can be completed without manual intervention, the calibration process is simplified, the testing period is shortened, and the method is suitable for batch detection scenes.

This invention provides a depth mapping calibration method and system based on liquid lens control parameters, belonging to the field of optical measurement calibration technology. The calibration method includes: acquiring calibration points at multiple known depth locations corresponding to the liquid lens control parameters and depth locations; preprocessing the calibration points; establishing a bidirectional mapping relationship between the control parameters and depth locations using a monotonically holding piecewise interpolation fitting algorithm (preferably PCHIP); and saving the calibration configuration. This invention solves the depth measurement accuracy problem caused by the nonlinear response of the liquid lens, achieving scan control with equal physical depth steps through precise calibration mapping, thus improving the accuracy and stability of depth-focused three-dimensional measurement. The method has a simple calibration process, is suitable for rapid on-site calibration, and its unified configuration management facilitates traceability.

The utility model relates to the technical field of water faucet, concretely relates to a bathroom faucet convenient to assemble, technical solution main points include valve body, valve core subassembly, end cover and handle, the hot water flow channel, cold water flow channel, water outlet flow channel and installation groove are arranged in the valve body, the tank bottom of installation groove sets up hot water hole, cold water hole and water outlet hole, the isolation department is arranged in the valve body, the isolation department is symmetrically arranged two and separates hot water and cold water, two isolation departments form the hook groove area, the canyon area, hot water hole, cold water hole are in the hook groove area, and water outlet hole is in the canyon area, and at least two positioning grooves are arranged on the tank bottom, the positioning column of two with the positioning groove insertion is arranged on the valve core subassembly, makes the water pass hole of valve core subassembly and hot water hole, cold water hole and water outlet hole mutually coincide. The utility model realizes reliable convenient assembly through above -mentioned structure.

The invention relates to the field of phased radars, and discloses an active phased array radar calibration method, which is used for improving the accuracy of actually measured phase data. Comprising the following steps: calculating theoretical excitation phases of radiation units according to an antenna array physical geometric structure and a target beam directional angle; enabling the antenna to sequentially excite the radiation units and collect coupling signals in a single-channel mode, and performing analysis to obtain an actually measured amplitude, a phase and a phase deviation; synthesizing the theoretical excitation phase and the phase deviation to generate an actual emission phase, and constructing a phase compensation lookup table; and after compensation by using the lookup table, measuring the actual directional diagram, and if not, performing fine adjustment. The calibration precision and reliability are improved, and the high-precision detection requirement of the active phased array radar can be met.

The invention provides a spark source atomic emission spectrometry determination method for acid-soluble aluminum and inclusion aluminum, and belongs to the technical field of assessment of inclusions in steel. The spark source atomic emission spectrometry determination method for acid-soluble aluminum and inclusion aluminum comprises the following steps: establishing a calibration curve of all aluminum, then determining integral intensities of inclusion aluminum, all aluminum and acid-soluble aluminum in a sample under corresponding conditions, and calculating the intensity of the inclusion aluminum by using a difference value between the integral intensities; selecting two standard samples with adjacent strength according to the strength of aluminum inclusion in the sample, and calculating a calibration coefficient K according to the aluminum content Al% lt; the excitation rate F is calculated according to the peak integral intensity of the inclusion aluminum and the integral intensity of the total aluminum in the 0.0007% standard sample, the inclusion aluminum content Als% is equal to K * F * (IAlt-IAls), and the content of the acid-soluble aluminum is equal to the difference between the content of the total aluminum and the content of the inclusion aluminum. According to the method, the accuracy of a measurement result is effectively improved while high analysis speed, low cost and simplicity and convenience in operation are ensured.

The application discloses an R-2R digital-analog converter with an auxiliary calibration structure and relates to the technical field of high-precision digital-analog conversion. The converter comprises a main DAC, a calibration quantity calculation module, a compensation code generation module, an auxiliary DAC and an operational amplifier circuit. The main DAC converts a digital input into an analog current. The calibration quantity calculation module generates a 15-bit compensation code containing a 1-bit sign bit and a 14-bit data bit through a 24-bit ADC, a comparator and successive approximation logic, and only calibrates the high 12 bits of the main DAC bit by bit, and the low 4 bits do not need to be calibrated. The compensation code generation module generates a total compensation code through gating by a multiplexer and superposition by an adder. The auxiliary DAC is a 14-bit binary current type structure, and realizes bidirectional compensation in cooperation with a positive and negative reference voltage source. The application has the advantages of short calibration period, small storage consumption, no need for additional bias calibration, excellent linearity, and suitability for application in the fields of wireless communication, biological medicine and the like, and meets the application requirements of high resolution and high precision.

The invention discloses a sensor data processing method and device, electronic equipment and a readable storage medium, and belongs to the technical field of data processing. The method comprises the steps of obtaining fisheye image data collected by a fisheye camera of a target vehicle, wherein the fisheye image data comprises image data of calibration cloth at a preset position of the target vehicle; acquiring first internal reference data of the fisheye camera, and determining target image coordinate data of the calibration cloth corner point based on the fisheye image data and the first internal reference data; acquiring space coordinate data of the calibration cloth corner point, and determining a first mapping relation according to the target image coordinate data and the space coordinate data; and determining external parameter data of the fisheye camera according to the first internal parameter data and the first mapping relation. According to the embodiment of the invention, the calibration process of the single equipment in the vehicle is simplified.

This invention discloses an automatic calibration method for dual robots in confined spaces based on adaptive point planning, belonging to the field of dual robot calibration technology. Based on the ROS architecture, a three-dimensional simulation model of the dual-robot workspace is constructed on the Rviz platform. A collision detection module is used to randomly generate calibration points composed of collision-free joint angle vectors of the two robots. While driving the robots, motion capture camera data and the Cartesian coordinates of the dual robots' forward kinematics are simultaneously acquired. A hand-eye calibration algorithm is used, optimized by the least squares method to obtain the calibration result, and its validity is determined by the average value of the data calibration accuracy until the dual-robot calibration is complete. This invention integrates simulation modeling, collision detection, and hand-eye calibration technology. Through an adaptive sampling strategy and a synchronous data acquisition mechanism, the complex calibration problem is transformed into a virtual environment parameter optimization process, significantly improving calibration robustness and accuracy, and providing a guarantee for high-precision collaborative control of dual robots.

The invention discloses a multi-IMU (Inertial Measurement Unit) distributed attitude estimation adaptive fault tolerance method based on closed-loop feedback. According to the method, a closed-loop feedback architecture of'calibration data drive threshold generation, threshold guidance fault detection and detection result optimization fusion weight 'is constructed. The method comprises the following steps: deploying a plurality of IMU nodes and marking microsecond-level timestamps, and realizing online calibration by utilizing multi-surface overturning so as to obtain relative attitude constants among the nodes; dynamically generating a self-adaptive threshold strongly correlated with the node pair based on the calibration data, and continuously updating to compensate for sensor aging and temperature drift; carrying out Byzantine fault-tolerant level fault detection by adopting a space-time redundancy mechanism; and finally, performing weight-adaptive complementary filtering fusion on normal nodes according to a detection result. According to the method, the problems of threshold stiffness, calibration dependence on tools, weak fault-tolerant capability and the like in the prior art are thoroughly solved, high-reliability and high-precision attitude estimation is realized, and the method is easy to operate and maintain.

This invention relates to a high-precision pose measurement method based on docking surface features, to solve the technical problems of high equipment cost, complex calibration process, and susceptibility to industrial environment in existing large component assembly methods. The method includes: 1. building an assembly platform; 2. calibrating the intrinsic parameters of a monocular vision sensor; 3. calibrating the monocular vision sensor and motion execution components using a hand-eye calibration method; 4. calibrating the corresponding target and pin hole; 5. measuring the pose of the first component relative to the second component.

This disclosure describes a sensing capability resistant to crosstalk. A current sensor is provided for a target conductor among a plurality of conductors. The current sensor includes at least one magnetic sensor configured to provide two signals representing two different parameters of a field, the two different parameters being different components or their directional derivatives (e.g., gradients). The current sensor also includes a processor configured to derive a signal indicating a current based on a linear combination of a first signal and at least a second signal. At least one of these signals is weighted by coefficients that are constants selected based on the distance between the sensor and at least one of the plurality of conductors in at least a first or second direction. The coefficients are selected to reduce the contribution of parasitic magnetic fields to the signal indicating a current in the first conductor, wherein the parasitic magnetic field is generated by at least one other conductor.

This utility model provides a level tilt alarm device and a level instrument, including a control module, a gyroscope, an alarm module, and a power module. The control module includes a microcontroller, which receives and analyzes the monitoring data from the gyroscope and controls the alarm module to sound an alarm. The gyroscope is connected to the microcontroller. The alarm module includes a sound alarm module, a light alarm module, and a connector. The sound alarm module and the light alarm module are electrically connected to the microcontroller and the connector, respectively, and the connector is electrically connected to the microcontroller. The level tilt alarm device and level instrument described in this utility model monitor the tilt angle of the level instrument through the gyroscope. The alarm module integrates sound and light alarm modules, with a buzzer built into the eyepiece mount providing auditory cues and an alarm light located inside the eyepiece barrel providing visual warnings, forming a dual alarm mechanism.

The invention provides an aspheric system error calibration method and device, and relates to the technical field of aspheric system error calibration, and the method comprises the steps: obtaining an alignment error; acquiring a rotational symmetry part of the measured aspheric surface at the first wavefront of the original measurement position and a rotational symmetry part of the measured aspheric surface at the second wavefront after the measured aspheric surface is translated by the preset distance along the optical axis; calculating an error surface according to the rotational symmetry part of the first wavefront, the rotational symmetry part of the second wavefront and the alignment error; fitting the error surface with a pre-constructed rotational symmetry error base, and solving a coefficient of each rotational symmetry error term; according to the coefficient and the rotational symmetry error substrate, reconstructing a rotational symmetry surface shape component of the measured aspheric surface; obtaining a rotational symmetry part of a system error according to the difference between the rotational symmetry part of the first wavefront and the reconstructed rotational symmetry surface shape component; according to the invention, the calibration process is obviously simplified, the measurement time is shortened, and the calibration efficiency is improved.

The invention relates to the field of force sensors, and discloses an orthogonal bidirectional force sensor of a variable cross-section cantilever structure and a measurement method, and the orthogonal bidirectional force sensor comprises a base, an elastic body, a first strain gauge group for detecting a first direction load component, a second strain gauge group for detecting a second direction load component, and a signal processing unit. The first direction is orthogonal to the second direction; the elastic body comprises a first cantilever and a second cantilever, the root of the first cantilever is fixed to the base, the tail of the first cantilever is perpendicularly connected with the side face of the root of the second cantilever, the tail of the second cantilever is a free end, the first strain gauge set is arranged on the first cantilever, and the second strain gauge set is arranged on the second cantilever. The first strain gauge group and the second strain gauge group are connected with the signal processing unit; the first cantilever adopts a first variable cross-section design. The invention has the advantages that the cross interference is reduced, the optimal balance between the sensitivity and the rigidity is realized, the space compactness and the integration degree are extremely high, and the manufacturing and calibration process is simplified.

The present application relates to a flowered stereo calibration box and a camera calibration method based on an OCAM algorithm, wherein the flowered stereo calibration box comprises five checkerboards, each checkerboard is a regular row and column distributed black and white checkerboard, the bottom checkerboard is a square, the four side checkerboards are rectangles, the four side checkerboards are connected with one bottom side of the bottom checkerboard respectively, the four side checkerboards are equal to the included angle of the bottom checkerboard, and the four side checkerboards are divergent and inclined upward with the bottom checkerboard as the center; the checkerboard small grid of the bottom checkerboard is provided with a closed black frame, the black frame does not intersect with the checkerboard small grid; the three sides of the four side checkerboards which do not intersect with the bottom side of the bottom checkerboard are provided with black frames, the black frames are connected with the checkerboard small grid of the side checkerboard; and the bottom checkerboard is provided with four circular calibration points. The present application reduces the requirement for image quality, and improves the operation precision and operation efficiency of panoramic camera calibration.

The invention discloses electronic equipment, a parameter calibration method and a computer readable storage medium. The electronic equipment comprises a shell, a transformer and a calibration module, wherein the transformer and the calibration module are arranged in the shell; the calibration module comprises a calibration load; and the controller is used for controlling the primary winding and the second secondary winding of the transformer and the calibration load to form an energy transmission path in a calibration mode and updating control parameters based on electrical operation parameters in the energy transmission path, and the control parameters are used for transmitting power to the plasma load. The calibration load arranged in the device and the winding corresponding to the transformer are controlled by the controller to form the energy transmission path, and the control parameters used for power transmission in the electronic device are updated through the electrical operation parameters on the energy transmission path, so that the calibration operation is completed, and the power transmission precision is improved. The calibration operation can be completed without disassembling equipment or returning to a factory, so that the calibration process is simplified, the calibration efficiency is improved, the maintenance cost is reduced, and the availability of the equipment is improved.

The utility model discloses a low-cost closed-loop analog quantity output module, which relates to the field of analog quantity output modules and comprises a single chip microcomputer, a low-pass filter circuit, a voltage regulation amplifying circuit, a voltage and current conversion circuit and a feedback circuit. The low-pass filter circuit is used for filtering an input signal output by a single chip microcomputer and transmitting the input signal to the voltage regulation amplification circuit and the voltage-current conversion circuit, the voltage regulation amplification circuit outputs a voltage output signal according to the filtered signal, and the voltage-current conversion circuit outputs a current output signal according to the filtered signal. The feedback circuit is used for collecting a voltage output signal and a current output signal, and the single-chip microcomputer is used for adjusting an input signal according to the voltage output signal and the current output signal. The analog quantity output module has the advantages of low cost, high precision, strong anti-interference capability and the like.

The present application proposes a stress inversion and numerical optimization based intrinsic strain field calibration method and system, belonging to the technical field of metal additive manufacturing numerical simulation. The present application solves the problems in the existing strain field calibration method, such as the lack of feedback calibration mechanism based on measured stress, the focus on residual deformation only, the inability to verify the material constitutive model, the poor generalization of intrinsic strain parameters, and the significant deviation between the prediction results of complex components and the actual measurement. The method comprises the following steps: S1: preparing a calibration sample according to the target material; S2: obtaining the measured value of residual stress at the measurement point of the calibration sample; S3: establishing a finite element model of the calibration sample; S4: establishing a target function and performing automatic iterative solution to obtain the optimal solution of the design variable. The system comprises a calibration sample preparation module, a stress measurement module, a modeling module and a design variable solving module.

The utility model discloses a kind of lithium battery pole piece thickness measuring device, including installation base, adjusting assembly, thickness measuring sensor and calibration module, the adjusting assembly is set on the installation base, the thickness measuring sensor is used to measure the thickness of pole piece, the calibration module is used to calibrate the measurement data of the thickness measuring sensor, the adjusting assembly is used to adjust the position of the thickness measuring sensor;The adjusting assembly includes adjusting plate and fixed plate, the adjusting plate is slidably connected on the installation base, the side of the adjusting plate is connected with the fixed plate, locking structure is provided on the fixed plate, the locking structure is used between the fixed plate and the installation base Fixed / unlocked, support plate is provided on the adjusting plate, the thickness measuring sensor is installed on the support plate.The utility model discloses a kind of lithium battery pole piece thickness measuring device with the advantages of improving measurement accuracy, realizing quick positioning locking, simplifying calibration process, enhancing structural stability.

The invention discloses a dynamic inspection and calibration system of a constant feeder, which relates to the technical field of metering and calibration and comprises a dust early warning end, an electrostatic early warning end and a dynamic calibration end, the dust early warning end is used for calculating the deviation between the initial weight and the running weight of a conveying belt in real time by monitoring the weight of materials detected at different positions of the constant feeder in the feeding and conveying process in real time; the static early warning end is used for obtaining static abnormity in the material conveying process in time and removing static electricity in time when the static abnormity occurs. The dynamic calibration end is used for checking and judging whether the feeding weight deviates or not in real time, and dynamic checking, calibration and judgment are conducted in real time by combining the discharging amount of different discharging port angles. According to the dynamic inspection and calibration system of the constant feeder, the abnormal metering condition of the constant feeder can be found in time, the static electricity abnormity of material conveying can be judged in real time, and the material weight of the feeder can be accurately inspected in real time according to the actual dynamic change condition.

The application discloses a method for correcting echelle spectrometer spectrum coordinates based on least square and polynomial fitting, which gives priority to the accuracy of spectrum restoration, and establishes an error correction and compensation model of actual imaging and theoretical imaging. The wavelength of the corrected imaging coordinates of the light spot is estimated, so as to establish a spectrum restoration model of two-dimensional spectrum pixel coordinates and wavelength. The method has high restoration accuracy and convenient operation, and can realize high-precision calibration only by using a small amount of characteristic wavelengths, and can be popularized and used in various types of echelle spectrometers and various spectral instruments and equipment with multiple dispersion characteristics.

This invention relates to the field of medical imaging technology, specifically to a method, system, and medium for energy calibration of a photon counting detector. The invention first eliminates the influence of ASIC on energy calibration by adjusting the pixel S-curves to be consistent before energy calibration, which reduces calibration differences between pixels and makes energy calibration more stable. The method of this invention directly uses X-rays for calibration, eliminating the need for filtering and simplifying the calibration process. Using this method simplifies the energy calibration process of photon counting detectors, makes the response changes of each pixel more consistent, and improves energy calibration stability, showing great application potential.

This invention discloses a microscope stage displacement error calibration method based on Hough transform image analysis. Addressing the stage displacement error of a microscope, multiple images of a common microscope scale are acquired. Hough transform image analysis is used to obtain the horizontal and vertical graduation lines of the scale. Feature analysis and detection are then used to determine the actual center point and the error between the actual center point and the horizontal displacement length and the system settings. Error compensation is then used to achieve precise center positioning and accurate horizontal movement of the stage. This invention eliminates the need for mechanical inspection and manual operation, achieving simple, fast, and stable microscope stage calibration through image analysis.

The invention belongs to the technical field of biomedical signal processing, and particularly relates to a sleep slow wave detection method based on a pseudo-linear enhanced phase-locked loop. The method comprises the steps that EEG data in the NREM3 period are acquired and preprocessed; establishing a sleep slow oscillation phase tracking algorithm of a pseudo-linear enhanced phase-locked loop with a phase loop and an amplitude loop coupled with each other, and tracking the phase and the amplitude of EEG data in real time; according to the detected real-time phase information, an effective stimulation instruction is sent out; and carrying out statistical verification on a closed-loop stimulation result, and evaluating algorithm performance. The method is high in phase tracking precision and small in stimulation opportunity error, and the effectiveness of stimulating and enhancing the SO rhythm can be greatly improved; the amplitude self-adaptive capacity is high, the individual adaptation range is wide, and the clinical application range of the technology is remarkably widened; the calculation complexity is low, the real-time performance meets the closed-loop requirement, the time consumption of single operation is low, the parameter calibration process is simplified, and clinical rapid deployment is facilitated.

A dynamic analysis method for the reflectance of vitrinite in continental hydrogen-rich shale based on normally distributed activation energy is proposed for oil and gas exploration and development, solving the problem that the existing Easy%Ro model is not suitable for the evolution analysis of vitrinite in continental hydrogen-rich shale. This invention includes: S1, a calibration method for the dynamic model of reflectance of vitrinite in continental hydrogen-rich shale; including a calibration method for the reaction dynamics model of vitrinite in hydrogen-rich shale based on in-situ thermal evolution simulation experiments or a calibration method for the reflectance dynamics model of vitrinite in hydrogen-rich shale based on paleothermal evolution history; S2, a forward modeling prediction method for geothermal evolution history based on the reflectance dynamics of vitrinite in continental hydrogen-rich shale. This invention establishes the SL_Ro model by obtaining data from in-situ thermal evolution experiments, which is more suitable for describing the reflectance evolution process of vitrinite in continental hydrogen-rich shale compared to the traditional Easy%Ro analysis method based on discrete distributed activation energy chemical kinetic models and exponential conversion relationships.

The invention relates to a safety helmet impact test device, and relates to the technical field of safety helmet test.The safety helmet impact test device comprises a base, a baffle is fixedly connected to the upper surface of the base, a top cabinet is fixedly connected to the upper end of the baffle, an impact loading assembly is installed on the top cabinet, and the impact loading assembly comprises a suspension adjusting mechanism and an impact mechanism; a safety helmet positioning assembly is arranged on the base and comprises a positioning mechanism and a clamping mechanism. Through the linkage design of the positioning mechanism and the clamping mechanism in the safety helmet positioning assembly, the effects of automatic precise positioning and stable clamping of safety helmets of multiple sizes are achieved, during operation, only the safety helmets need to be placed on a fan-shaped tray, manual repeated adjustment is not needed, the safety helmet positioning assembly is suitable for products of different head circumference specifications, and the production efficiency is improved. The problems that a traditional device is poor in positioning adaptability and prone to displacement in testing are solved, it is ensured that the impact action point is consistent with the preset position, and the accuracy of testing data is improved.

The application discloses a tower-shaped calibration board, a camera and laser radar combined calibration method and system, wherein the tower-shaped calibration board is in a tower-shaped structure and is composed of N layers of mutually parallel calibration board planes which are spaced and stacked, the size of each layer of calibration board plane is increased step by step from top to bottom; wherein N is greater than or equal to 2; the center of the N layers of calibration board planes is located on the same plumb line; the layer spacing between adjacent two layers of calibration board planes is adjustable; a plurality of two-dimensional code patterns are printed on each layer of calibration board plane; the number of two-dimensional code patterns on each layer of calibration board plane is increased step by step from top to bottom; each two-dimensional code pattern contains coding information and a plurality of predefined feature points, and the world coordinates of each feature point in the world coordinate system have been calibrated. The execution of the camera and laser radar combined calibration method is based on a kind of tower-shaped calibration board, and through the application, one-time high-precision calibration of camera intrinsic parameters and camera and laser radar extrinsic parameters can be realized.

An alignment mechanism for aligning a substrate in a vacuum chamber is provided. The alignment mechanism comprises an actuator configured to be coupled to a chamber wall of the vacuum chamber and a lever pivotably arranged on a first pivot axis. The lever is actuatable by the actuator to be pivoted about the first pivot axis for aligning the substrate. The alignment mechanism further comprises a substrate contact portion. The substrate contact portion is configured for contacting the substrate. The substrate contact portion is pivotably coupled to the lever and is pivotable about a second pivot axis. Furthermore, a vacuum chamber for processing large area substrates is provided, the vacuum chamber comprising an alignment mechanism.