23results about How to "Eliminate drift" patented technology

A discrete manufacturing pipeline quality prediction method based on mechanism and data joint driving belongs to the field of intelligent manufacturing and industrial artificial intelligence, and the method comprises the following steps: first, data acquisition and preprocessing under the industrial scene of the discrete manufacturing pipeline; second, state space deduction and single variable nonlinear analysis of the sparse time sequence characteristics of the discrete manufacturing pipeline; third, mechanism joint training and real-time closed-loop intervention of the discrete manufacturing pipeline quality prediction model. The present application significantly improves the physical consistency of the discrete manufacturing pipeline quality prediction, realizes continuous inference of the hidden state under irregular sampling gaps, and enhances the safety decision-making ability and engineering application value of the automatic control of the discrete manufacturing pipeline.

The integrated microfluidic detection chip comprises a liquid conveying channel, the upper end and the lower end of the liquid conveying channel are each provided with an inlet, the center position of the side end of the liquid conveying channel is communicated with a mixing channel, the other end of the mixing channel is communicated with a flow velocity difference channel, and the flow velocity difference channel is communicated with a flow velocity sensor. An electrode detection disc is arranged on the side face of the flow velocity difference channel in a communicating mode, and a circular barrier is fixedly arranged in the electrode detection disc. Compared with a traditional detection chip, the integrated microfluidic detection chip based on dual-channel flow velocity difference vortex enhancement has the following remarkable advantages: a breakthrough in mass transfer limit is achieved: through multiple physical coupling of dual-channel flow velocity difference, incident angle optimization and a circular barrier, substance transmission is converted from single molecule diffusion to active vortex driving; the bottleneck that mass transfer of a microfluidic system is limited is solved, and in-situ dynamic refreshing of a detection interface is realized by an automatically generated discrete sample injection mode.

The application belongs to the field of physical property measurement, and discloses a kind of electroplating additive concentration on-line detection method and system based on multispectral fusion, comprising: guiding flow electroplating liquid through detection cell, control transducer array to generate sub-cavitation megahertz standing wave field, utilize acoustic radiation force to drive free gas bubble to gather to wave crest area, make nodal area form the light path of no scattering interference;Real-time monitoring impedance phase, when reaching resonance extreme point, produce synchronous trigger signal, drive light source to emit ultraviolet wave band light beam, visible wave band light beam and near infrared wave band light beam to light path;Extract the intensity correction absorption brightness parameter of main salt reference wavelength, obtain response sequence and output additive concentration, the application reconstructs the phase distribution of measurement environment, blocks random scattering to the erosion of spectral information, ensures the fidelity of measurement data corresponding to physical fact, solves the problem that trace component signal is hidden in complex matrix.

The utility model discloses an ammonium sulfate drying, spraying and water replenishing system which comprises a belt conveyor, a drying bed main body, a heat exchanger, a cyclone dust collector, a water washing dust collector and an evaporation raw water tank, one end of the heat exchanger is connected into heat source steam, the other end of the heat exchanger is connected into a condensation bolt pipe network, the heat exchanger inputs air through the air blower for heat exchange to form hot air, and the hot air enters the drying bed main body, passes through the cyclone dust collector and then passes through the washing dust collector for secondary dust removal. The system has the beneficial effects that the problems of tail gas dust and smell in the ammonium sulfate drying process can be solved, the problems of dust particles and hot gas drifting in the tail gas are solved, crystals in the tail gas are recycled, and particulate matter pollution caused by direct exhaust of the tail gas is reduced; the problem that other water is introduced is effectively avoided, the evaporation water amount of the system is reduced, and water resource consumption of a large amount of spraying water is avoided.

The application provides a kind of electrochemical immune sensing detection method for fruit and vegetable organochlorine pesticide multi-residue, belongs to the technical field of food safety detection, comprising: using liquid pulse discharge plasma synchronous reduction method to prepare g-C3N4-COOH / AuNPs heterojunction composite material with lattice coupling interface and modify on the surface of silk screen printing carbon electrode, through click chemistry reaction, azide modified organochlorine antigen is covalently fixed on the electrode surface, and the labeled immune probe loaded with different electrochemical signal substances and different organochlorine pesticide specific antibodies is used for competitive immune reaction, the differential pulse voltammetry response curve in the whole potential interval is collected, a plurality of characteristic parameters are extracted, and the concentration of multiple organochlorine pesticides is simultaneously solved by using partial least squares multivariate correction model.The application solves the problems of low interface electron transport efficiency, uncontrollable antigen fixation orientation, serious interference of complex matrix and difficult multi-residue signal resolution in the prior art.

This invention discloses a method for preparing nano-boehmite and its application in lithium-ion battery separators, belonging to the field of inorganic nanomaterial preparation technology. The method includes five steps: raw material calcination and activation, preparation of precursor slurry, hydrothermal synthesis reaction, washing and filtration, and drying and depolymerization. Calcination is carried out in a dynamic calcination furnace, whose exhaust mechanism can promptly remove water vapor. During discharge, the switching mechanism automatically opens the discharge cover, achieving continuous production with no material sticking to the wall and no residue. The obtained nano-boehmite is characterized by low sodium content, uniform particle size, and good dispersibility. This material can be formulated with binders and other agents to form a ceramic coating slurry. After coating and drying, a robust nano-ceramic coating is formed on the surface of a polyolefin-based membrane. This coating significantly improves the thermal stability, electrolyte wettability, and puncture resistance of the separator, thereby improving the battery's safety performance and cycle life.

This application relates to the field of gas content detection technology, specifically to a method for monitoring gas content in underground coal mines for safety production monitoring. The method includes: acquiring the infrared spectrum of the gas to be measured in the coal mine and a sample set; calculating the importance of each wavenumber point using the sample set; obtaining the sensitivity coefficient, inhibition factor, baseline fluctuation, and adjustment coefficient for each wavenumber point in the infrared spectrum to be measured; correcting the smoothing parameters of the baseline calibration algorithm twice to obtain the final corrected smoothing parameters; and using the baseline calibration algorithm to perform baseline calibration on the infrared spectrum to be measured, thereby quantitatively detecting the gas content in the coal mine. This application can effectively remove baseline drift while preserving important spectral features, more accurately extracting gas characteristic peaks, and improving the quantitative detection accuracy of gas content.

The application provides a high-temperature detection method and system based on near-infrared full-spectrum analysis, relates to the field of high-temperature detection, and solves the technical problems of low high-temperature measurement precision, weak anti-interference ability and poor universality caused by the use of discrete wavelength point information in the prior art. The method comprises the following steps: collecting full-spectrum radiation signals of a high-temperature target to be measured in a near-infrared band to obtain a spectral curve of the high-temperature target to be measured; performing baseline correction and normalization pretreatment on the spectral curve; fitting the pretreated spectral curve with standard spectral curves in a blackbody standard curve library established in advance to obtain a fitting goodness parameter; and analyzing the temperature value of the high-temperature target to be measured according to the fitting goodness parameter. The application is used in the high-temperature detection process.

This invention discloses a strapdown inertial navigation algorithm based on a four-hemispherical resonant gyroscope configuration. Addressing the engineering challenge of online ADB error compensation, it employs an orthogonal and oblique configuration of four HRGs, establishing a single HRG angular rate measurement error model and measurement equations for the four HRGs. By designing distinct alternating positive and negative self-excitation angular rates for each HRG, the measurement matrix becomes time-varying, allowing for the separation and estimation of ADB amplitude / phase errors and self-excitation coefficient errors during Kalman filtering. The position error estimated by the filter is then used to correct the inertial navigation output in real time. This invention achieves online ADB error identification and compensation without relying on external references, significantly reducing the side effects of self-excitation and improving navigation accuracy and system reliability.

The application discloses a kind of based on group sparse restricted boltzmann machine's electroencephalogram epileptic spike wave detection system, belong to electroencephalogram signal processing and medical auxiliary diagnosis technical field.The system is filtered to multichannel electroencephalogram signal, extracts time-frequency amplitude characteristics by linear time-frequency conversion, divides characteristic wave band subset according to electroencephalogram physiological frequency band and combines to form time-frequency characteristic sample;With normal background electroencephalogram sample, the restricted boltzmann machine model is unsupervised training, and group sparse regular constraint is introduced;Based on the dissimilarity score of hidden layer and the local median absolute deviation dynamic threshold of local abnormal trigger point in single channel are marked;Global spike wave event is confirmed after multichannel spatial co-occurrence filtering, and the frequency and time length sliding window of parallel use are used to determine the interval of abnormal spike wave rhythm attack of epilepsy.The application does not need to mark abnormal sample, and has strong adaptability, and is suitable for clinical epilepsy automatic monitoring and auxiliary diagnosis scene.

This utility model discloses a circular die-cutting machine, relating to the technical field of circular die-cutting machines. It includes a fixed plate, a circular die-cutting assembly on the top of the fixed plate, a gantry frame on the top of the fixed plate, and a fixed shell on the surface of the gantry frame. Limiting mechanisms for preventing material deviation on the left and right sides are provided on the gantry frame and the fixed shell. Two clamping mechanisms for clamping the material on the upper and lower sides to prevent jumping are provided on the limiting mechanisms. Each limiting mechanism includes a limiting shaft rotatably mounted on the gantry frame. A gear is fixedly mounted at the bottom end of the limiting shaft. Two moving rods are slidably mounted on the inner wall of the fixed shell. A toothed rod is fixedly mounted on the surface of each of the two moving rods, and the two toothed rods mesh with the gear. This utility model achieves positioning and correction for materials of various widths and thicknesses, offering high flexibility, good correction effect, improved die-cutting accuracy, simple operation, and strong practicality.

The invention discloses an automatic nipple opening positioning system and guiding system for duodenal nipple intubation guidance, solves the problem of how to realize high-precision and high-robustness positioning of a nipple opening under multiple constraints, and belongs to the technical field of medical image processing and computer-aided surgical navigation. According to the invention, a generative model is utilized to actively deduce anatomical features of a shielded area, and continuous tracking in an instrument shielding scene is realized; establishing an absolute mapping relation between a pixel position and a target coordinate through injection explicit space geometry prior, and obtaining a nipple opening pixel-level coordinate; visual uncertainty estimation and instrument-tissue kinematics coupling are fused, a physically constrained adaptive filtering mechanism is constructed, and smooth coordinates are obtained; the positioning system is used for constructing a guiding system, closed-loop interaction of instrument control through a handle and inlet coordinate positioning feedback is achieved in an operation environment, and dual-scene application of preoperative training and intraoperative navigation is supported.

The application discloses a kind of based on chopping operational amplifier circuit, the positive and negative input of operational amplifier circuit is connected to operational amplifier unit through a pair of differential pair input, then is output through output stage, operational amplifier unit includes two gain boost operational amplifier, operational amplifier circuit also includes offset voltage adjustment current circuit, chopping switch is equipped at the positive and negative input of operational amplifier circuit, the input of gain boost operational amplifier and inside, gain boost gain boost folded cascode operational amplifier with chopping technology is used, including common-mode voltage control, while improving the output impedance and gain of cascode stage, the offset, drift and 1 / f noise of itself can be eliminated, offset voltage adjustment current circuit reduces the offset voltage caused by transistor size variation in production and manufacture, output stage uses DC bias voltage control circuit, both ensure that output tube is slightly on, improve the output response speed of operational amplifier, and can be controlled at lower static power consumption level.The application realizes effective zero drift technology by independent chopping circuit.

The application relates to the technical field of multi-spacecraft cooperative control, and discloses a multi-spacecraft grouping consistency restraint control method and device under optimized FLS, which comprises the following steps: acquiring the network topology of a heterogeneous multi-spacecraft system and constructing a multi-subgroup directed communication topology network, constructing a spacecraft attitude control system model based on modified Rodrigues parameters; approximating unknown nonlinear terms in the model through a fuzzy logic system, constructing a fuzzy logic system based on a gradient descent algorithm and Armijo line search criterion; constructing a restraint control term and using a backstepping method to construct a virtual control law, combining the output of the fuzzy logic system based on the gradient descent algorithm and the Armijo line search criterion to construct an actual control input law, so that grouping consistency restraint control of the heterogeneous multi-spacecraft system is realized. The application can improve real-time approximation precision and adaptive step length adjustment capability while guaranteeing grouping consistency, and can enhance topology applicability and task cooperation flexibility.

The application discloses a kind of AR technology-based construction auxiliary guidance method and system, it is related to building information technology technical field, wherein including: obtaining building geometry and semantic information by BIM model, establish global coordinate and calculate anchor point, construct BIM-semantic topological pose graph;Obtain structural plane feature, anchor point matching and pose solution are carried out in combination with BIM-semantic topological pose graph, obtain global initial pose;Real-time global accurate pose is solved using hierarchical pose graph optimization algorithm;According to global accurate pose, concealed engineering component model in BIM construction model is superimposed and rendered to AR terminal picture;When floor switching event is identified, trigger building level global pose graph optimization, and maintain the coordinate system continuity of AR superimposed content, carry out no-sense switching.The application aims to solve the technical problem that large-scale global space consistency is difficult to guarantee under complex building environment.

The application discloses a traceable temperature measuring probe structure and a traceable calibration method thereof, and the structure is composed of a probe mechanical structure, a phase change material, a flexible heating sheet and a platinum resistance; the phase change material is encapsulated in a hollow cylinder on the probe mechanical structure; the flexible heating sheet is attached to the outer surface of the hollow cylinder on the probe mechanical structure, and the flexible heating sheet is connected to a power supply through two wires to perform heating operation; the platinum resistance is arranged in a groove directly below the hollow cylinder on the probe mechanical structure, and four-wire method is adopted to perform temperature measurement operation. The temperature measuring probe structure is suitable for long-term and high-precision application occasions, and has the advantages that the measurement result can be calibrated according to the definition of international temperature scale, the temperature measuring probe structure does not need to be disassembled, and the drift of the temperature measurement result caused by the performance change of the platinum resistance and the temperature measurement electronics part is weakened.

The invention relates to the technical field of coal chemical industry processes, and discloses an energy efficiency optimization method and system for deslagging in a coal gas debenzolization process, and the method comprises the following steps: calculating a washing oil residue generation rate by using a reaction kinetic model, and carrying out integration to obtain an accumulated residue amount; when the slag quantity reaches a threshold value, establishing a mapping relation between slag discharge duration and target mass through a fluid mechanics model, and realizing quantitative slag discharge; in a material conveying process, a comprehensive emulsification risk index is constructed based on shearing and turbulence characteristics of a pipeline pressure signal, and a flow control mode or a hot lean oil dilution mode is dynamically switched according to the comprehensive emulsification risk index; and adaptively correcting the risk judgment threshold value by using the separation quality feedback of the mechanical clarifying tank. Through multi-physical field model coupling and closed-loop feedback, quantitative control of the deslagging process and emulsification inhibition of the conveying process are achieved, and the separation efficiency and operation stability of the system are improved.

The invention provides a photoelectric detector, a photoelectric detection device and a driving method thereof, relates to the technical field of photoelectric detection, and is used for solving the problems of relatively high dark current, current baseline drift and the like of a flat panel detector. A photoelectric detection circuit in the photoelectric detector comprises a first transistor and a photoelectric detection diode, a first electrode of the first transistor is coupled with a voltage signal line, and a second electrode of the first transistor is coupled with a sensing signal line; the photoelectric detection diode is located on the side, opposite to the substrate, of the active layer of the first transistor and comprises a first electrode layer, a first carrier transmission layer, a photoelectric conversion layer, a second carrier transmission layer and a bias electrode layer which are sequentially arranged in a stacked mode in the direction away from the substrate. A channel part in the active layer is multiplexed as a first electrode layer; the bias electrode layer is coupled with a bias voltage input end; the orthographic projection of the bias electrode layer on the substrate is at least partially overlapped with the orthographic projection of the first electrode of the first transistor on the substrate.

The application discloses a calibration circuit, a chip and an electronic device. The calibration circuit comprises a target sub-circuit, and is used for calibrating a target chip comprising a to-be-calibrated pull-up resistor module and a to-be-calibrated pull-down resistor module. The target sub-circuit comprises a comparison module and a pull-up resistor module with adjustable resistance. The target sub-circuit has a first state and a second state. When the target sub-circuit is in the first state, first input ends of the comparison module are electrically connected with the target resistor and the pull-up resistor module respectively. When the target sub-circuit is in the second state, the first input ends of the comparison module are electrically connected with the to-be-calibrated pull-up resistor module and the to-be-calibrated pull-down resistor module respectively. A second input end of the comparison module is used for inputting a reference voltage. In this way, the to-be-calibrated pull-up resistor module and the to-be-calibrated pull-down resistor module in the target chip can be calibrated by the calibration circuit, so as to eliminate the drift generated in the chip as much as possible, reduce the probability of impedance mismatch, and improve the performance of the chip.

This invention relates to the field of microbial detection technology and discloses a method for detecting the colony content of cosmetics based on an intelligent sensing system. The method includes: projecting three-phase phase-shifted structured light onto a culture plate, demodulating to obtain the diffuse reflection alternating component matrix, and calculating the reduced scattering coefficient matrix to decouple static scattering interference; subsequently extracting the true microbial absorption coefficient matrix excluding powder interference, and calculating the speckle time contrast matrix in conjunction with continuously acquired speckle time series; exponentially fusing the two to construct a biochemical and physical activity fusion index matrix, and obtaining the cumulative biomass through local background smoothing and spatial integration; finally, adaptively generating a judgment threshold based on the global data of the culture plate, performing step-constraint screening to remove artifacts, and calculating the absolute total colony count. This invention effectively overcomes the problem of serious early false detections caused by cosmetic matrix artifacts, achieving accurate, closed-loop quantitative identification of live colonies without dependence on external sample libraries.

This invention discloses a method and system for discriminating and compensating for rust particle scattering in a dual-path colorimetric assay within the same pool, belonging to the field of water quality optical detection and colorimetric analysis technology. The method includes: S1, before adding the colorimetric reagent, acquiring the transmission signal and scattering signal before the reaction under a long optical path, calculating scattering characteristic parameters, and determining the rust particle scattering interference level; S2, selecting a long or short optical path based on the scattering interference level and a preset transmission lower limit threshold, and using an electromagnetic shutter to select the chosen optical path; S3, after adding the colorimetric reagent, mixing and performing a colorimetric reaction for a preset time; S4, acquiring the transmission signal and scattering signal after the reaction under the same optical path, calculating the differential absorbance and scattering change; S5, obtaining the corrected absorbance through scattering compensation; S6, converting the corrected absorbance into the target analyte concentration based on the calibration relationship corresponding to the selected optical path and outputting the result. This invention can reduce measurement deviations caused by rust particle scattering and expand its applicability.

The application discloses a kind of high stability HPM power measuring device with online self-calibration function, belong to HPM measurement technical field.It includes: signal monitoring and interlocking unit, for real-time monitoring HPM input port signal has no;Intelligent timing and control unit, for when no pulse state continues to exceed dead time threshold value Judgment enters calibration window and triggers calibration sequence;Main radio frequency switch, for switching measurement main passage to built-in reference source in calibration window;Dual-mode built-in reference source, for output known power calibration signal;High-speed signal acquisition chain, for collecting calibration signal response;Environment adaptive processing unit, integrated temperature and vibration sensor, for compensating environmental drift.The application avoids calibration process and high-power emission period conflict through pulse detection and dead zone determination mechanism, realizes safe, reliable online self-calibration, significantly improves the measurement accuracy and stability of device in harsh environment.

The application discloses a method and system for quantitatively identifying barley adulteration in wheat flour based on Raman spectroscopy. The method comprises the following steps: collecting Raman spectrum raw data of the wheat flour sample to be tested; preprocessing the Raman spectrum raw data, including adaptive baseline correction and standardization processing, to suppress fluorescence interference and eliminate dimensional effects; performing dimension reduction feature extraction based on distance preservation on the preprocessed Raman spectrum data to obtain a feature vector; and inputting the feature vector into a pre-trained one-dimensional convolutional neural network model to output the proportion of barley adulteration. The application adopts the airPLSDA baseline correction combined with the MDS feature extraction and the SSA optimized 1DCNN model, the fluorescence suppression rate can reach 90.5%, the prediction relative error of the 5% low adulteration proportion sample is not more than 3.9%, and the rapid, accurate and non-destructive quantitative detection of the barley adulteration in the wheat flour is realized, which is suitable for the authenticity identification of imported and exported wheat flour.