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10results about How to "Improve filtering efficiency" patented technology
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Video frame processing method and device, electronic equipment and storage medium
PendingCN119420916AImprove subjective and objective qualityImprove filter qualityDigital video signal modificationTime domainComputer graphics (images)
The invention provides a video frame processing method and device, electronic equipment and a storage medium. The video frame processing method comprises the following steps: acquiring a plurality of video frames from a video to be used for coding; determining a filtering reference frame of the current video frame based on the frame type and the coding reference relation of the current video frame to be filtered in the plurality of video frames; and performing time domain filtering of motion compensation on the current video frame based on the filtering reference frame of the current video frame.
Owner:BEIJING DAJIA INTERNET INFORMATION TECH CO LTD
RTK positioning method and device based on slam positioning result assistance, equipment and medium
ActiveCN119511328AImprove filtering efficiencyImprove efficiencyNavigational calculation instrumentsDigital data processing detailsEngineeringComputer vision
The invention provides an RTK positioning method and device based on slam positioning result assistance, equipment and a medium, auxiliary optimization is provided for RTK solution by using a slam positioning result, a double-difference observation equation is constructed by taking the slam positioning result as an initial value, and subsequent filtering processing is performed, which can be understood that the slam positioning result is taken as a filtering initial value, so that the filtering efficiency is effectively improved, and the real-time performance of the system is improved. The number of filtering iterations is reduced, and the floating point solution precision is improved; meanwhile, in the RTK solution, auxiliary optimization is provided for the RTK solution by using the slam positioning result, and the ambiguity fixing efficiency and the ambiguity fixing rate are improved. Besides, in the RTK solution, auxiliary optimization is provided for the RTK solution by using the slam positioning result, and the slam positioning result is used as a fixed solution verification initial value, so that the precision of the fixed solution is improved. In conclusion, the scheme disclosed by the invention effectively improves the RTK positioning precision, efficiency and robustness.
Owner:CHENGDU GREEN TURLON JIWU TECHNOLOGY CO LTD +2
Wire harness filtering device and vehicle
ActiveCN222591413UReduce electromagnetic interferenceReduce external radiationStructural engineeringMechanical engineering
Owner:BEIJING CO WHEELS TECH CO LTD
DC system anti-rebound interference power filter
The present invention belongs to the field of electromagnetic compatibility, and relates to an anti-rebound interference power supply filter for suppressing the counter-interference generated by the current surge during the operation of electrical equipment with high-power IGBT elements as the core on the DC power bus. It is mainly used in the DC power supply system of Dongfeng diesel locomotives to suppress the counter-interference generated by the current surge during the operation of the air-conditioning inverter connected to the locomotive power bus on the bus, and improve the reliability and safety of other electrical equipment in the same power bus. The power supply filter includes: a group of π-type low-frequency filter circuits for suppressing electromagnetic interference of low-frequency components, a group of fourth-order Butterworth high-frequency filter circuits for suppressing electromagnetic interference of medium and high-frequency components, and a group of RDC damping absorption circuits with redundancy for suppressing high-amplitude DC current surges. The low-frequency filter circuit and high-frequency filter circuit of the present invention adopt a fully balanced circuit structure, so that the surge of counter-interference can be suppressed when it is connected to the bus from the positive terminal or the negative terminal.
Owner:金波 +2
A filter and synchronization signal processing method
PendingCN122226012AAll-pass filtering implementationGuaranteed filtering accuracyDigital technique network
The application discloses a filter and a synchronization signal processing method. The filter comprises a first filter set and a second filter set; input ends of the first filter set and the second filter set are connected to a signal sampling component; output ends of the first filter set and the second filter set are connected to a filter output end; the signal sampling component is used for collecting a double-sampling-point communication signal and transmitting the communication signal to the first filter set and the second filter set; the first filter set is used for receiving a first communication signal and filtering the first communication signal to obtain a first filtered signal; the second filter set is used for receiving a second communication signal and filtering the second communication signal to obtain a second filtered signal; and the filter output end is used for coupling the first filtered signal and the second filtered signal to obtain a final filtered signal. According to the embodiment of the application, the downsampling is realized while the filtering precision is ensured, and the operation amount is reduced.
Owner:CHINA MOBILE M2M +2
Intelligent control device for permanent magnet synchronous motor
The application discloses a kind of permanent magnet synchronous motor intelligent control device, it is related to motor control technical field to solve the problem of lower filtering efficiency of existing permanent magnet synchronous motor control device.A kind of permanent magnet synchronous motor intelligent control device includes: permanent magnet synchronous motor and intelligent controller;Intelligent controller is installed in permanent magnet synchronous motor intelligent control device with permanent magnet synchronous motor;Intelligent controller is connected with permanent magnet synchronous motor communication;Intelligent controller is used to control permanent magnet synchronous motor;Intelligent controller is installed with adaptive current filter;Adaptive current filter uses improved LMS algorithm to filter the current of permanent magnet synchronous motor;Improved LMS algorithm adds correction parameter;Correction parameter is used to dynamically adjust the weight of weight update function in improved LMS algorithm.The application is used to improve the filtering efficiency of permanent magnet synchronous motor control device.
Owner:CHENGDU AICH TECH CO LTD
Automatic matching method of high-frequency and high-precision filter
ActiveCN119298879ARealize automatic matchingImprove matching efficiencyDigital technique networkAdaptive networkSonarData simulation
The invention relates to the technical field of filter data processing, and provides an automatic matching method for a high-frequency and high-precision filter, which comprises the following steps of: acquiring operation data and signals of the filter, converting the operation data and signals into digital signals, and constructing an automatic matching simulation model based on historical data. And receiving a matching task demand, performing simulation operation to obtain a matching result, and comparing the matching result with an actual matching result. And if the difference exceeds a preset range, detecting and optimizing a matching rule. And meanwhile, constructing an operation data simulation model by utilizing task demand historical data and operation historical data, generating simulation data for matching, extracting data features for unsuccessful matching conditions, and optimizing a matching rule by adopting a genetic algorithm. Automatic matching of the high-frequency and high-precision filter is achieved, matching efficiency and accuracy are improved, the method is suitable for the fields of communication, radar, sonar and the like, and the problem that an automatic filter matching system in the prior art cannot effectively deal with complexity and variability of high-frequency signals is solved.
Owner:SHENZHEN NUOXINBO COMM CO LTD
MEMS Fabry-Perot filter and preparation method thereof
ActiveCN119620379AExtended range of movementImprove filtering efficiencyOptical elementsResonant cavityThermal dilatation
The invention relates to the technical field of filtering, in particular to an MEMS Fabry-Perot filter and a preparation method thereof. An upper polar plate; the first reflecting layer and the second reflecting layer are arranged in the supporting frame, are parallel to each other all the time and are used for jointly limiting a Fabry-Perot resonant cavity; the driving assembly is connected between the upper polar plate and the supporting frame, and a driving unit is arranged in the driving assembly; the driving unit is formed by combining a telescopic layer and at least one first electric heating layer. The telescopic layer comprises a second electric heating layer, a resistive layer, a first insulating layer located between the resistive layer and the second electric heating layer, and a second insulating layer located on the side, away from the second electric heating layer, of the resistive layer. The thermal expansion coefficient of the first electric heating layer is smaller than that of the second electric heating layer, and the at least one first electric heating layer is attached to the second electric heating layer and / or the second insulating layer. The electrothermal driving structure can realize miniaturization of the filter, the structure is simplified, the overall size and weight are reduced, and the device reliability is high.
Owner:CHONGQING INST OF MICROELECTRONICS BEIJING INST OF TECH
A swing-type screening device for plastic recycling
The utility model provides a swing type screening device of plastic recycling, including the blanking base, the bottom rotation of blanking base is connected with the rotating base, and the rotating base bottom is equipped with the discharge gate, the eccentric position of rotating base bottom is arranged to the discharge gate, the below of blanking base is equipped with the filter screen frame, is equipped with the filter screen mesh plate on the filter screen frame, the top of filter screen frame is equipped with the material shifting guide plate. The utility model discloses through the work of control motor support, makes the output shaft on motor support so is equipped with the drive gear and the external gear that the rotating base upper end sets is engaged transmission, drives the rotating base to rotate, thereby the rotating change position of the discharge gate that rotating base bottom sets, in the process that material is along the discharge gate guide and falls, makes the falling track of material to rotate swing, thereby effectively even the material is scattered on the filter screen mesh plate top, improves the screening efficiency of filter screen mesh plate.
Owner:SHANGHAI HUANHUA MASCH CO LTD
Signal processing system and method
PendingCN119324855Asmall amount of calculationimprove performanceTransmitter/receiver shaping networksMulti-frequency code systemsTarget signalSoftware engineering
The invention discloses a signal processing system and method, and the method comprises the steps: carrying out the processing of a received radio frequency signal based on a signal receiving module, and obtaining a baseband discrete signal of an orthogonal frequency division multiplexing time domain; performing down-sampling on the baseband discrete signal based on a non-recursive CIC filter to generate a down-sampled signal; compensating a passband of the down-sampling signal based on an index compensation filter to obtain a compensation signal; and attenuating the compensation signal based on a comb filter to obtain a target signal. According to the signal processing method provided by the embodiment of the invention, the high performance of the down-sampling filter is ensured, the calculation amount of the filter is reduced, and the filtering efficiency is improved.
Owner:SHENZHEN XUNZHI WULIAN TECH CO LTD