57 results about "Linear measurement" patented technology

The invention provides an out-of-focus lens microlens diopter measurement method, system, medium and device, and relates to the technical field of optical measurement, and the method comprises the steps: placing a to-be-measured out-of-focus lens on a rotary table; controlling a Z-axis motion guide rail to drive a line measurement sensor to move, and determining a path scanning zero point; the rotary table is controlled to rotate at a constant speed, and the X-axis movement guide rail and the Z-axis movement guide rail drive the line measurement sensor to move so as to obtain point cloud data of the upper surface of the to-be-measured out-of-focus lens; performing conversion, fitting and data extraction on the point cloud data to obtain a two-dimensional profile curve of each micro lens unit included in the to-be-measured defocus lens; and calculating the diopter of each micro-lens unit according to the two-dimensional profile curve of each micro-lens unit. According to the method, independent quantitative evaluation of the additional diopter of the microstructure is realized, and the defects that the macroscopic diopter and the microstructure diopter cannot be separated by a lensometer and the macroscopic diopter and the microstructure diopter are difficult to accurately disassemble in an existing non-contact technology are overcome.

The invention discloses a self-supervised tomographic SAR (Synthetic Aperture Radar) reconstruction method based on orthogonal subspace decomposition. According to the method, a traditional single original space is reconstructed and expanded into a Range-Null-Raw triple space collaborative learning framework, an R2R and N2N principle-based self-supervised loss function is constructed by using an orthogonal subspace decomposition characteristic of a linear measurement operator, direct mapping learning from noise measurement data to a high-quality reconstruction result is realized, and the real-time performance of a real-time reconstruction system is greatly improved, so that the real-time performance of the real-time performance of the real-time performance of the real-time performance of the real-time performance of the real-time performance of the real-time performance is improved. Observable components are learned through Range space, unobservable components are learned through Null space, a cross constraint strategy of global consistency is ensured through Raw space, and the adaptability of the model to real measurement conditions is enhanced. The performance gap between simulation training and actual deployment in deep learning TomoSAR reconstruction is effectively solved, and a new solution is provided for reliable application of an unsupervised deep reconstruction network in a real TomoSAR imaging task.

The present application relates to a kind of unmanned aerial vehicle impact interception methods based on monocular vision, the azimuth measurement information and angle measurement information of target unmanned aerial vehicle are calculated by target detection algorithm based on monocular vision;Azimuth measurement information and angle measurement information are used, through orthogonal projection matrix and algebraic transformation, non-linear measurement is converted into pseudo-linear form, then pseudo-linear adaptive Kalman filtering algorithm is carried out to estimate the position of target unmanned aerial vehicle, finally, unmanned aerial vehicle maneuvering strategy is used to control impact unmanned aerial vehicle to realize the impact interception of target unmanned aerial vehicle.The method of the present application is obviously improved in system noise robustness, target state estimation accuracy and pursuit efficiency.The present application also relates to impact unmanned aerial vehicle guided by the above impact interception method.

The invention discloses an IC board warping degree and curved surface groove detection method based on a three-dimensional point cloud, and the method comprises the following steps: S1, collecting the point cloud data of the surface of an IC board through a three-dimensional imaging device, and carrying out the noise filtering, resampling and attitude normalization preprocessing; s2, nine key points distributed on the surface of the IC board are automatically extracted, a reference surface is generated through a curved surface fitting algorithm based on coordinates of the key points, and the height deviation value of each key point relative to the reference surface is calculated; according to the method, nine key points are selected on the surface of the IC Board, the global reference curved surface is generated by combining the curved surface fitting technology of the three-dimensional point cloud, and errors caused by local height anomaly or measurement noise are effectively avoided. Through the multi-dimensional analysis of the height difference between the central point and the edge point, the quantification of the warping degree is more comprehensive, the measurement result is more stable and reliable, and compared with a traditional single-point or linear measurement method, the method has higher precision and robustness.

The invention discloses a seamless range switching system and a seamless range switching method for instrument current measurement. The seamless range switching system comprises a digital-to-analog converter, an error amplifier, a first driving circuit, a first current measurement circuit, a clamping circuit, a second driving circuit, a second current measurement circuit, two analog-to-digital converters and a field programmable gate array. The first current measuring circuit converts 10 [mu] A to 30 mA low current into a first voltage signal to form a negative feedback closed loop. When the first voltage signal reaches a Zener breakdown threshold value, the clamping circuit outputs a trigger signal to start the second driving circuit, so that the two driving circuits jointly provide a total current of 30mA to 500mA for the load; the two analog-to-digital converters perform synchronous sampling, and the field programmable gate array selects digital signal output which is in a linear measurement range and has an error not exceeding + / -0.05% of a full scale. No mechanical switch exists in the switching process, the current is uninterrupted, and wide-range high-precision continuous measurement is achieved.

The utility model discloses a circuit breaker. The service life evaluation unit is used for evaluating the residual electric operation service life of the circuit breaker according to current measurement data records of the current measurement unit; the current measuring unit comprises a first current measuring circuit and a second current measuring circuit which are arranged in parallel; the first current measurement circuit is a current measurement circuit based on an iron core current transformer, a current measurement value ICT of the first current measurement circuit is used as a current basis for circuit breaker protection action judgment, and when the ICT is in a linear measurement range of the iron core current transformer, the ICT is used as current measurement data for recording; the second current measurement circuit is a current measurement circuit based on a PCB Rogowski coil transformer, and the current measurement value IRC of the second current measurement circuit is recorded as current current measurement data when the ICT is out of the linear measurement range of the iron core current transformer. Compared with the prior art, the device can accurately measure the fault current, and further provides an accurate basis for the evaluation of the service life of electric operation.

The invention discloses a segmental beam prefabrication linear measurement method and system based on mixed mark positioning. The method comprises the steps that circular diagonal coding marks are arranged at control points of a fixed end mold and the top of a segmental beam; the circular diagonal coding mark adopts two characteristics of a white positioning circle and a diagonal mark; acquiring a plurality of images comprising all circular diagonal coded marks, and identifying and acquiring the center coordinates of each coded mark in each image by adopting an image processing method; matching marks with the same coded value in different images, and performing initial calculation on camera external parameters of each image and three-dimensional world coordinates of a control point on the top surface of a segmental beam based on known three-dimensional world coordinates of a control point of a fixed end mode; and global joint optimization is carried out on the camera external parameters of all the images and the three-dimensional world coordinates of the control points at the top of the segmental beam to obtain the three-dimensional world coordinates of the control points of the segmental beam. The problems of large manual measurement error, low efficiency and the like can be solved, and automation of linear measurement of the precast beam field is realized.

The application discloses an edge computing network service function chain embedding method based on K shortest path, and aims at a distributed service function chain embedding problem under time delay constraint. In the case of meeting the end-to-end time delay constraint, a service function embedding algorithm based on K shortest path algorithm is designed to minimize the deployment cost. The application firstly proposes a service function embedding problem modeling method based on a weighted layered graph, and converts the service function chain embedding problem into a minimum cost path problem under time delay constraint in the weighted layered graph. Secondly, a service function chain embedding mechanism under time delay constraint is designed based on the weighted layered graph and K-linear measurement aggregation algorithm. Compared with the prior art, the application has better high performance and operability, and has practical significance for complex network applications in edge computing networks.

The present application belongs to the field of sound field reconstruction and sound source identification technology, and discloses an equivalent source sound field positioning method and system based on sparse sound intensity measurement, which acquires the complex sound pressure and complex particle velocity at the measurement point on the holographic surface through a vector sensor array, and calculates the measured sound intensity vector; constructs a sound intensity transfer matrix based on the equivalent source method, establishes a linear measurement equation between the measured sound intensity vector and the equivalent source intensity vector; by using the spatial sparsity of the equivalent source intensity, the solving of the equivalent source intensity vector is converted into an L1 norm sparse optimization problem, and a convex optimization algorithm is used to solve it to obtain the optimal equivalent source intensity vector; based on the optimal equivalent source intensity vector, the acoustic quantity at any point in the target sound field is reconstructed by combining the free field Green function. The present application uses the active component of the sound intensity vector to suppress non-related noise, improves the ill-conditioned inversion by combining the compressive sensing theory, and can realize high robustness and high precision sound source positioning and sound field reconstruction without reference microphones.

The application provides a visible light band optical fiber SPR liquid refractive index linear measurement device and method, the device comprises a broadband light source, a first lens and a second lens, a polarizer, a third lens and a fourth lens, a pinhole, a fifth lens, an optical fiber SPR, a sixth lens, a diffraction grating, a concave mirror, a linear array CCD and a data processing unit; the data processing unit is used for extracting the resonance wavelength corresponding to the normalized light intensity minimum value from the wavelength-intensity spectrum curve, and calculating the refractive index of the liquid medium to be measured according to the linear relationship between the refractive index and the resonance wavelength which is calibrated in advance. The device is not only intuitive in optical path debugging and easy to operate, but also has a rigorous theoretical model and high measurement precision, and is very suitable for rapid and accurate refractive index screening and analysis of a large number of low-concentration liquid samples, and has wide application prospect and industrial value.

The invention relates to an apparatus for measuring a depth of a bore hole. The apparatus includes an elongated strip including linear measurement markings along at least a portion of a length of the strip. A weight is provided at an end of the strip and the strip is comprised of material that has an elastic (Young's) modulus of greater than 0.5 and less than 2.0 GPa. Embodiments of the invention are adapted to quickly and effectively measure the depth of a bore hole or a depth to any major obstructions such as loose rocks that may have fallen into the bore hole.

Smoke detector test bench (1) (test device), preferably in the form of an optical bench, for the functional testing of a smoke detector, in particular a linear smoke detector based on the transmitted light principle, in particular for conformity testing in accordance with the requirements of and / or in accordance with DIN EN 54-12, in particular for functional testing by evaluating the attenuation or attenuation change of an optical beam (2), in particular for determining the response value (trigger limit value), in particular wherein the smoke detector to be tested responds to attenuation and / or attenuation change of an optical beam (2) and has at least one transmitter (3), at least one receiver (4) and optionally at least one reflector (5) or at least one transmitter-receiver arrangement (6) and at least one reflector (5), wherein the smoke detector test bench (1) comprises: - a first test specimen holder (7) for holding and / or receiving a receiver (4) or a transmitter-receiver arrangement (6) of a smoke detector to be tested, - a second test holder (8), in particular arranged opposite the first test holder, for holding and / or receiving a transmitter (3) or a reflector (5) of the smoke detector, wherein an optical, in particular linear, measuring section (2) is formed and / or is present between the first test specimen holder and the second test specimen holder (8), preferably wherein the first test specimen holder (7) and the second test specimen holder (8) are arranged and / or are to be arranged such that in the operating and / or test state of the smoke detector test stand (1) the receiver (4) or the transmitter-receiver arrangement (6) of the smoke detector to be tested, held and / or received by the first test specimen holder (7), on the one hand, and the transmitter (3) or reflector (5) held and / or received by the second test specimen holder (8), on the other hand, are positioned and / or aligned at least substantially at the same height and / or (horizontally) aligned; the smoke detector test bench (1) also features: - a positioning device (9) for the particularly selective and / or preferably automated and / or motorized insertion and / or removal of several test filters (10) from a plurality of test filters (10) provided and / or make available, in particular with the positioning device (9), into the beam path and / or out of the beam path of an optical beam (2) emanating from the transmitter (3) or the transmitter-receiver arrangement (6) and optionally reflected by a reflector (5) to generate an attenuation or a change in the attenuation of the optical beam (2), in particular wherein the positioning device (9) is designed • for the selective and / or preferably automated and / or motorized insertion and / or removal of a plurality of test filters (10), in particular both a single test filter (10) and a plurality of test filters (10), into or out of the beam path, wherein several test filters (10) inserted into the beam path have different distances to the first test specimen holder (7) and / or to the second test specimen holder (8), preferably different distances to the first test specimen holder (7) and to the second test specimen holder (8), and / or • for the selective and / or preferably automated and / or motorized insertion and / or removal of several test filters (10) from a plurality of test filters (10) into the beam path and / or out of the beam path, wherein the test filters (10) inserted into the beam path are arranged linearly in succession in the beam path in the direction of the optical beam (2); in particular wherein the positioning device (9) has a plurality of test filter holders (11) arranged linearly in the direction of the optical beam, wherein each test filter holder (11) is designed to hold and insert and / or remove at least one, preferably only one, test filter (10) into or out of the beam path and / or wherein each test filter holder (11) can be positioned independently of the other test filter holder(s) (11) within the beam path and / or wherein the test filter holders have a different distance to at least one test specimen holder (7, 8), in particular to both test specimen holders (7, 8), and / or in particular wherein the positioning device (9) is designed for the independent insertion and / or removal of several test filters (10) from a plurality of test filters (10) into or out of the beam path, preferably wherein each test filter (10) can always be inserted into the optical beam (2) at a test filter-specific position specified for the respective test filter (10) with a test filter-specific distance to at least one test specimen holder (7, 8), in particular to both test specimen holders (7, 8), preferably to the transmitter (3) or the transmitter-receiver arrangement (6) or to the receiver (4).

The application discloses a kind of low-loss proportional amplification fluxgate current sensor measurement methods, it is related to current measurement technical field, including, obtaining the observation set of synchronous demodulation by phase-locked;Based on the scheduling optimization function of prediction set construction, apply soft opening constraint, amplitude stability constraint, phase consistency constraint and saturation depth constraint, output corresponding control variable;According to control variable setting excitation signal parameter and executing excitation drive and compensation injection, extract the harmonic amplitude-phase response of current cycle in demodulation window position;Harmonic amplitude-phase response is converted into linear measurement output of current cycle, while updating observation set.The application implements proportional closed-loop conversion in I / Q rectangular coordinates, combines amplitude error and phase error into compensation current update amount, and combines calibration proportionality coefficient and output amplitude limiting, so that closed-loop converges amplitude-phase deviation in linear interval quickly, improves compensation current stability and response speed and reduces energy consumption.

The invention discloses a measurement method of a fluxgate current sensor with low loss and scale amplification, which relates to the technical field of current measurement and comprises the following steps of: acquiring an observed quantity set subjected to phase locking synchronous demodulation; constructing a scheduling optimization function based on the pre-measurement set, applying a soft opening constraint, an amplitude stability constraint, a phase consistency constraint and a saturation depth constraint, and outputting a corresponding control variable; excitation signal parameters are set according to the control variables, excitation driving and compensation injection are executed, and harmonic amplitude phase response of the current period is extracted in the position of the demodulation window; and converting the harmonic amplitude-phase response into linear measurement output of the current period, and updating the observed quantity set at the same time. Proportional closed-loop conversion is implemented in I / Q rectangular coordinates, amplitude errors and phase errors are synthesized into compensation current updating quantity, and a calibration proportionality coefficient and output amplitude limiting are combined, so that a closed loop quickly converges amplitude-phase deviation in a linear interval, the stability and response speed of compensation current are improved, and energy consumption is reduced.

The invention discloses a robust visual servo control method and verification system based on interference estimation. The method comprises the following steps: acquiring an environment RGB image and depth information; constructing a state transition equation and a pseudo-linear measurement equation, and performing joint estimation on the target position and speed by adopting a Kalman filter; according to the estimated target space position, establishing a geometric mapping relation between a rotary table coordinate system and a target coordinate system, and calculating an attitude angle required by the rotary table; and designing a time-varying disturbance observer, estimating unmodeled dynamics and external disturbance of the system in real time, performing feed-forward compensation based on a disturbance estimation value, and generating an anti-disturbance control instruction in combination with an expected attitude angle. The system is applied to the servo control method and comprises the two-degree-of-freedom rotary table, the depth camera, the target, the connecting firmware, the laser director, the balancing weight and the ground station. According to the invention, the precision of servo control can be improved. The method can be widely applied to the field of sensing control.

The invention belongs to the technical field of radar maneuvering target tracking, and particularly relates to an interactive multi-model radar maneuvering target tracking algorithm based on random Kalman filter (RKF), which is suitable for effective tracking of a maneuvering target under the condition of polar / spherical coordinate measurement. According to the method, a plurality of RKF filters with different variances are introduced under an interactive multimode framework, so that the coverage of the motion state of a maneuvering target with multiple unknown motion modes is realized, and meanwhile, non-linear measurement conversion of depolarization and decorrelation is realized based on a predicted value under the filtering framework; finally, a radar maneuvering target tracking algorithm (IMM-RKF-DUCM) based on multiple RKF models is provided. Compared with the traditional IMM-REKF, IMM-DUCM and single-model RKF-DUCM, the method can maintain high stability and high precision in an unknown or rapidly changing maneuvering scene, significantly reduces the probability of failure, and is a radar target tracking algorithm with higher robustness and better tracking performance.

The utility model belongs to the technical field of semiconductor coating equipment, and particularly relates to novel magnetron sputtering target material thickness detection equipment which comprises a main chamber, a back plate, a left baffle and a right baffle are arranged in the main chamber, a track transmission part, a guide rail and an infrared distance measuring sensor are arranged in a sputtering equipment process cavity, and the track transmission part drives the guide rail to move. The infrared distance measuring sensor moves along the guide rail to linearly measure the distance from the infrared distance measuring sensor to the surface of the target material, and then the residual thickness of the target material is calculated, so that the real-time monitoring of the thickness of the target material is realized, and the replacement time of the target material is accurately determined; compared with the prior art, the measuring precision and the production efficiency of the machine are improved.

The application relates to the technical field of electromagnetic imaging, in particular to a three-dimensional target electromagnetic property perception method based on a reconfigurable intelligent surface, which comprises the following steps: configuring parameters of an electromagnetic imaging system, generating RIS unit scattering coefficients based on mutual coherence optimization by adopting an MCBB algorithm; configuring the scattering coefficients on the RIS, scattering and reconstructing electromagnetic waves generated by a transmitting antenna; linearly correlating contrast parameters of a measurement target with received scattering field data by adopting a linear measurement model; and finally, inverting the target electromagnetic property by utilizing mt_cs. The application realizes high-precision inversion of the target electromagnetic property in the RIS-assisted imaging framework by optimizing and designing the super-surface reflection coefficient and constructing a measurement matrix with multi-dimensional low cross-correlation characteristics.

The application discloses a kind of pure angle target trajectory estimation methods, this method will typical target motion model be converted into the autoregressive moving average model of position component to realize state decoupling, by adjusting the relationship between pseudo-linear least square cost function and process noise energy to obtain regularized pseudo-linear least square model.To reduce the estimation deviation generated by the correlation between pseudo-linear measurement matrix and noise, the regularized instrumental variable least square position estimation is obtained by using instrumental variable estimation method.The method of the application obtains the analytical expression of batch estimation of azimuth position component in the framework of regularized least square estimation.The method has linear time calculation complexity, and its estimation performance is irrelevant to initial state.

The embodiment of the invention provides an image data compression method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining to-be-compressed image data, and obtaining a measurement matrix; performing linear measurement on the to-be-compressed image data based on the measurement matrix to obtain initial global observation data, and obtaining initial local observation data of a plurality of local areas; a sensing area is selected from the local areas one by one, a row layer correlation area of the sensing area is obtained based on the row layer direction, and a column block consensus area of the sensing area is obtained based on the column block direction; updating the sensing local observation data based on all the row layer local observation data, obtaining local estimation data, and performing consensus updating until all the sensing local observation data are updated; and performing global refining processing based on all local estimation data to obtain image compression data corresponding to the to-be-compressed image data, and when image data compression is performed, ensuring the calculation efficiency and the compression precision at the same time.

The invention relates to an unmanned aerial vehicle collision interception method based on monocular vision. The method comprises the following steps: calculating azimuth measurement information and angle measurement information of a target unmanned aerial vehicle through a target detection algorithm based on monocular vision; nonlinear measurement is converted into a pseudo-linear form through an orthogonal projection matrix and algebraic transformation by using azimuth measurement information and angle measurement information, and then the position of a target unmanned aerial vehicle is estimated by a pseudo-linear adaptive Kalman filtering algorithm. And finally, adopting an unmanned aerial vehicle maneuvering strategy to control the collision unmanned aerial vehicle to realize collision interception of the target unmanned aerial vehicle. The method provided by the invention has obvious improvement effects on system noise robustness, target state estimation precision and pursuit efficiency. The invention further relates to the impact unmanned aerial vehicle guided by the impact interception method.

The utility model discloses a calibration device for a DIC system, which comprises a force standard machine and a strain standard plate used for non-contact three-dimensional strain measurement of the DIC system, and two ends of the strain standard plate are connected between an upper chuck and a lower chuck of the force standard machine through a universal hinge mechanism. The strain standard plate is provided with a double-optical-path laser interference system used for linear measurement and rotation angle measurement, and the double-optical-path laser interference system comprises a double-optical-path laser interferometer, and a spectroscope group and a reflector group which are vertically installed at the upper end and the lower end of the strain standard plate in an opposite manner. A measurement area is formed between the spectroscope group and the reflector group; and the double-light-path laser interferometer is used for carrying out linear measurement and rotation angle measurement between the spectroscope group and the reflector group. The calibration device has the advantages of being reasonable in structural design, convenient to operate and use, capable of calibrating the DIC measurement system and the like.

This invention discloses a linearization method for eddy current displacement sensors based on exponential carrier pulse width modulation (PWM). This method addresses the problem of limited linear measurement range of the output voltage of eddy current displacement sensors. First, the displacement-voltage characteristic curve of the eddy current displacement sensor is measured. Then, a linearization circuit based on exponential carrier PWM is constructed, and the circuit parameters are adjusted so that the shape of the exponential carrier is identical to the displacement-voltage characteristic curve of the eddy current displacement sensor. The output voltage of the eddy current displacement sensor to be linearized and the exponential carrier are pulse-width modulated (PWM). A standard PWM waveform is obtained by passing it through a double inverter, then filtered in a low-pass filter, and finally the linearized voltage of the eddy current displacement sensor is output. This invention effectively improves the linearity of eddy current displacement sensors, enabling them to have a wider linear measurement range within a given measurement range.

The invention discloses a two-degree-of-freedom linear displacement sensor and a measurement method, and belongs to the technical field of measurement sensing. The sensor comprises a movable ruler base body and a fixed ruler base body, parallelogram exciting electrodes arranged in the x direction are arranged on the fixed ruler base body, and parallelogram sensing electrodes arranged in the x direction are arranged on the movable ruler base body. Certain included angles are formed between the exciting electrodes and the induction electrodes and the length direction of the sizing base body; a displacement value calculated by an output signal of the induction electrode is subjected to inverse calculation through a trigonometric function, so that a real displacement value when the movable ruler base body moves along the x direction and the y direction can be obtained. The excitation electrodes and the induction electrodes are arranged in an inclined mode, displacement in the x direction and displacement in the y direction can be measured at the same time by conducting trigonometric function calculation on displacement values of the two rows of induction electrodes, the sensor is simple in structure, one reading head can conduct measurement in the two directions at the same time, and offset errors caused by linear measurement are effectively reduced.

The application discloses a segmental beam prefabrication linear measurement method and system based on mixed mark positioning, and the method comprises the following steps: arranging circular diagonal coding marks on the control points of a fixed end mold and a segmental beam top; the circular diagonal coding marks adopt two features of a white positioning circle and a diagonal mark; collecting multiple images including all the circular diagonal coding marks, and adopting an image processing method to identify and acquire the center coordinates of each coding mark in each image; matching the marks with the same coding value in different images, and based on the known three-dimensional world coordinates of the fixed end mold control points, initially solving the camera external parameters of each image and the three-dimensional world coordinates of the segmental beam top surface control points; and then globally jointly optimizing the camera external parameters of all the images and the three-dimensional world coordinates of each control point of the segmental beam top, so as to obtain the three-dimensional world coordinates of each control point of the segmental beam. The application can solve the problems of large manual measurement error and low efficiency, and realizes the automation of the linear measurement of the prefabricated beam field.

The invention discloses a calibration method of a multichannel transmitter calibration device, and belongs to the technical field of metering calibration. The method comprises the following steps: in response to a configuration instruction, controlling a connection state of a power supply module and a target channel to enable the target channel to enter a working state; collecting an original electric signal in the power supply loop, wherein the original electric signal comprises a loop current value and a power supply voltage value; and performing correction processing on the original electric signal by using a preset calibration parameter, and outputting a target measurement value. According to the invention, undisturbed switching control based on compliance margin prediction and a bivariate coupling error compensation model based on power supply voltage and loop current are adopted. According to the method, the problem of nonlinear measurement errors caused by voltage fluctuation under a multi-channel common power supply framework and the problem of protection misjudgment caused by hard switching transient are solved, and automatic calibration without intervention of an external precise power supply is realized.

The image data compression method, apparatus, electronic device, and storage medium proposed in this application include: acquiring image data to be compressed and acquiring a measurement matrix; performing linear measurements on the image data to be compressed based on the measurement matrix to obtain initial global observation data and initial local observation data for multiple local regions; selecting sensing regions one by one from the multiple local regions, obtaining row-layer associated regions of the sensing regions based on row-layer direction, and obtaining column-block consensus regions of the sensing regions based on column-block direction; updating the sensing local observation data based on all row-layer local observation data and obtaining local estimation data, and performing consensus updates until all sensing local observation data updates are completed; and performing global refinement processing based on all local estimation data to obtain image compressed data corresponding to the image data to be compressed, ensuring both computational efficiency and compression accuracy during image data compression.

The application discloses a kind of calibration methods of multichannel transmitter calibration device, belong to metrological calibration technical field.The method includes: in response to configuration instruction, the connection state of control power module and target channel, make target channel enter working state;Original electric signal in power supply loop is collected, original electric signal includes loop current value and power supply voltage value;Original electric signal is modified using preset calibration parameter, and target measurement value is output.The application has adopted the undisturbed switching control based on compliance margin prediction, and the double-variable coupling error compensation model based on power supply voltage and loop current.The method solves the non-linear measurement error problem caused by voltage fluctuation under the multi-channel common power supply architecture, and the protection misjudgment problem caused by hard switching transient, realizes the automatic calibration without external precision power supply intervention.

The utility model discloses a shoulder positioning and measuring device for a lithium battery with a rolling groove structure. The shoulder positioning and measuring device comprises a bottom plate; the bracket is fixed on the bottom plate, and the top surface of the bracket is provided with a bearing structure matched with the appearance of a battery to be tested; the linear measuring element is provided with two measuring needle ends which are oppositely arranged; the linear measuring element comprises a base plate, a bracket and at least two clamping pieces, the at least two clamping pieces are symmetrically fixed on the base plate and located at the side ends of the bracket, a clamping space matched with a linear measuring element body is formed between the at least two clamping pieces, and the top surface of the bracket is provided with a bearing structure matched with the appearance of a battery to be measured, so that the battery can be stably supported; the clamping structure at the top of the limiting column is matched with the battery rolling groove, the limiting disc and the limiting column are oppositely arranged to jointly position the battery, and a stable measuring basis is formed.