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44results about How to "Avoid accumulating errors" patented technology
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Audio splice process for digital Ad insertion
InactiveUS20050022253A1Avoid underflowPrevent overflowPulse modulation television signal transmissionColor signal processing circuitsComputer hardwareVariable bit rate vbr
A system and method for audio splicing (insertion) of an Ad audio stream in the compressed domain, where variable early delivery of the Ad audio stream and variable bit rate are allowed, without creating audio distortion, glitches, or other digital artefacts or errors, in the resultant audio stream is disclosed. The present system and method provides for a splice delay buffer which delays the first five Ad audio frames until transmission of the last frame of the primary audio stream, but before the splice time. Subsequent Ad audio frames are delayed by a fixed amount, where the fixed amount is greater than the frame delay of the primary audio stream, to allow for ease of splice back to the primary audio stream.
Owner:GOOGLE TECH HLDG LLC
Course angle rotation-based multi-beam side-scan sonar image real-time splicing method
InactiveCN102707289AAvoid accumulating errorsCalculation speedImage enhancementAcoustic wave reradiationComputer visionUnderwater noise
The invention provides a course angle rotation-based multi-beam side-scan sonar image real-time splicing method. The method comprises the following steps of: acquiring initial data in all channels of a multi-beam side-scan sonar, and setting an initial position for splicing images; removing a water column area generated because an energy transducer receives an underwater noise before a first echo point returns; writing N channel data of the first ping in the initial data from which the water column area is removed into a canvas, and recording the current ping number and the current course angle; reading N channel data of the next ping and corresponding global positioning system (GPS) and course angle information, calculating the difference value between the course angles of the first ping and the next ping, if the course angle does not change, splicing the images in sequence according to the GPS information, and if the course angle changes, splicing the images after rotating the data, wherein the rotating angle is the difference value between the course angels; and modifying gaps in the spliced image. The invention discloses a multi-beam side-scan sonar image real-time splicing method which is high in precision and low in calculation amount and has a good display effect.
Owner:HARBIN ENG UNIV
Steel box beam jacking pushing and slide moving construction method and beam falling auxiliary device
ActiveCN104562940AAvoid accumulating errorsReduce in quantityBridge erection/assemblyBuilding construction
The invention belongs to the field of bridge construction, and particularly relates to a steel box beam jacking pushing and slide moving construction method and a beam falling auxiliary device. The method comprises the following steps of (1) cutting mark marking; (2) reference section installation; (3) deviation pre-correction before section in-place; (4) margin cutting; (5) section fine adjustment; (6) beam bottom leveling padding; (7) beam falling auxiliary device installation; (8) beam falling positioning; (9) beam falling bridge forming. The method and the device provided by the invention have the beneficial effects that the construction is simple and convenient, the efficiency is high, the construction and the installation are accurate, and the like.
Owner:YINGDU BRIDGE STEEL STRUCTURE ENG
Three-degree-of-freedom precision-positioning workbench
InactiveCN101871549AEasy to operateHigh precisionStands/trestlesThree degrees of freedomDegrees of freedom
The invention relates to a three-degree-of-freedom precision-positioning workbench, comprising the workbench and an enlarged base, wherein, the workbench and the enlarged base are positioned through three cylindrical rods; and three groups of two-stage enlarging mechanisms are vertically intersected to form the enlarged base. The precision-positioning workbench can reach nanoscale positioning precision, has good operability, effectively overcomes the problem of input and output coupling among the three groups of micrometric displacement enlarging mechanisms, and increases the operating flexibility.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
Vehicle-mounted alternating-current-generating hydraulic driving device
A vehicle-mounted alternating-current-generating hydraulic driving device comprises a chassis power takeoff unit, an alternating-current generator, a closed hydraulic pump, a hydraulic motor, a radiator, a replacement flushing valve, a hydraulic oil tank and a programmable controller. The hydraulic pump is connected with the chassis power takeoff unit, an oil outlet of the closed hydraulic pump is connected with an oil inlet of the hydraulic motor, an oil inlet of the hydraulic pump is connected with an oil outlet of the hydraulic motor, the oil inlet and the oil outlet of the hydraulic motor are connected with a flushing oil port of the replacement flushing valve, an oil outlet of the replacement flushing valve is connected with an oil inlet of the radiator, an oil outlet of the radiator is connected with an inlet of the hydraulic oil tank, an outlet of the hydraulic oil tank is connected with the closed hydraulic pump, a hydraulic pump rotating speed sensor and a motor rotating speed sensor are respectively connected with the programmable controller which connected with a variable servo valve, and the hydraulic motor is connected with the alternating-current generator. By the vehicle-mounted alternating-current-generating hydraulic driving device, rotating speed of the hydraulic motor driving the generator is maintained constant, and the hydraulic motor can be mounted at any position of a vehicle, so that the problem that mounting space of a high-power generator is limited is solved.
Owner:LANZHOU LITIAN TONGCHUANG FLUID CONTROL EQUIPCO
Rotary dry powder packing machine
The invention provides a rotary dry powder packing machine which comprises a rack, wherein a rotating shaft is rotatably mounted on the rack, a rotating cylinder is fixedly mounted on the rotating shaft, a plurality of annularly distributed packing devices are arranged uniformly at the bottom of the rotating cylinder, each packing device comprises a bag insertion starting device used for starting the whole set of the packing device after bag insertion, an automatic metering device used for weighing a packing bag, a sealing device used for sealing a discharge rubber tube after the last packing bag is packed, an automatic bag dropping return device used for automatically dropping the packing bag after the packing bag is packed, and a dust collection device used for processing the raised dust leaking from a dust discharge nozzle of the automatic bag dropping return device, and the bag insertion starting device, the automatic metering device, the sealing device and the automatic bag dropping return device are all electrically connected with a control system of the rotary dry powder packing machine. The rotary dry powder packing machine achieves automated packing production, is simple in operation and accurate in metering, simplifies the operation process, and also improves the production capacity and the working efficiency.
Owner:潍坊佰固建材设备有限公司
Battery charge state determination method and device
The embodiment of the invention discloses a battery charge state determination method and a device, wherein the phenomenon that the charge state goes beyond the normal physical range is reduced. The method comprises the steps of according to the equivalent circuit model of a battery and the Kalman filtering algorithm, obtaining a first parameter value for the relevant parameters of the battery charge state; if the first parameter value is within a preset range, obtaining an optimal solution for the battery charge state at the current moment based on the first parameter value; if the first parameter value is out of the preset range, replacing the first parameter value with a preset second parameter value for the relevant parameters, and obtaining the optimal solution for the battery charge state at the current moment, wherein the second parameter value is within the preset range.
Owner:NEUSOFT REACH AUTOMOTIVE TECH SHANGHAI CO LTD
Octagonal-box-shaped pylon foot and manufacturing method thereof
InactiveCN107254938AIngenious structural designIncreased load-bearing capacityStrutsBridge structural detailsStress concentrationEngineering
The invention discloses an octagonal-box-shaped pylon foot which comprises a frame unit and a pylon bottom plate unit. The frame unit comprises a frame, a middle web and a transverse separating plate, wherein the frame is defined by a group of wallboards, the middle web is axially arranged in the frame, and the transverse separating plate is radially arranged in the frame. The pylon bottom plate unit is arranged at one end of the frame unit. The octagonal-box-shaped pylon foot is reasonable in design, firm in structure and good in bearing capacity, and guarantees the quality of a whole project. According to the method, the quality of each member and each unit is ensured, welding stress concentration is effectively controlled, accumulative errors generated by large members are prevented, and thus the machining quality of the whole pylon foot is guaranteed.
Owner:JIANGSU HUNING STEEL MECHANISM
Elevator sensor self-calibration system and method
PendingCN108408523ALow impact of static errorsAvoid accumulating errorsElevatorsComputer moduleElevator control
The invention discloses an elevator sensor self-calibration system. An elevator control mainboard and a measuring module are included; the measuring module comprises a sensor and a processor; the elevator control mainboard is used for sending a measuring instruction to the processor; the sensor is used for acquiring static data of an elevator and transmitting the static data to the processor; andthe processor is used for receiving the measuring instruction sent by the elevator control mainboard, controls the sensor to acquire the static data of the elevator and processes the static data, andthe self-calibration process is completed according to the static data acquired by the sensor. The invention further discloses an elevator sensor self-calibration method. By adopting the processor toprocess the static data of the elevator acquired by the sensor and complete the self-calibration process, static errors are eliminated, it is achieved that the sensor is calibrated in real time, the calibrating operation is easy and fast, the function expansibility is high, and cost is low.
Owner:GUANGZHOU GUANGRI ELEVATOR IND
Mounting method of flitch with projection line control curved section curved plate
The invention relates to a mounting method of a flitch with a projection line control curved section curved plate, comprising the following steps: 1, drawing a curved plate location map according to a computerization jig frame map; 2, drawing from a component line related by an outer plate and a projection line of a suture at the end part of the outer part, and installing a rib plate; 3, positioning and installing a component according to the projection line of the ground; and 4, carrying out dispersed adhering on the outer plate, and carrying out trimming cutting on margin according to requirement in the dispersed adhering process, so that the dispersedly adhered outer plate can be positioned and installed strictly according to the projection line. According to the invention, a constructor can intuitively find out precision deviation of curved section construction during construction, so as to avoid accumulated error caused by one or multiple procedures.
Owner:HUDONG ZHONGHUA SHIPBUILDINGGROUP
Gas producer deslagging device
InactiveCN103320169AAvoid accumulating errorsImprove stabilityCombustible gas productionSlagEngineering
The invention discloses a gas producer deslagging device which comprises a slag plate, a supporting part arranged on the bottom of the slag plate, a driving part for driving the slag plate to rotate and an airduct. The slag plate comprises a plate body, a rotary sleeve disposed on the bottom of the plate body, a supporting runner and spacing teeth. The supporting part comprises a base pier and a central supporting part. The supporting runner is arranged on the base pier. The central supporting part comprises a cannula sleeved outside the rotary sleeve and at least two support arms which are fixedly connected with the outer wall of the cannula. The gas producer deslagging device is characterized by comprising a stop part, a central rotating part and a floating part as well. The stop part comprises a support and a lever type stop rod which is arranged on the support through a rotating shaft. An indirect rotation mechanism comprises an inner ring fixed on the outer wall pipe section of the rotary sleeve and a middle ring which is sleeved between the inner ring and the cannula. The floating part is composed of a water seal, the bottom of which is connected with the airduct. The rotary sleeve is positioned in the water seal. The bottom of the inner ring is sleeved at the opening part of the water seal. By the adoption of the gas producer deslagging device, deslagging smoothness and stability are raised, and failure rate of the equipment is reduced.
Owner:上海诚达工业炉有限公司
Computer-implemented method and system employing nonlinear direct prestack seismic inversion for poisson impedance
ActiveUS20210165119A1Avoid uncertaintyAvoid propagationSeismic signal processingSeismology for water-loggingLithologyPorous medium
A computer-implemented method, and system implementing the method, are disclosed for computing a final model of elastic properties, using nonlinear direct prestack seismic inversion for Poisson impedance. User inputs and earth-model data is obtained over points of incidence of a survey region, at various angles of incidence. Various models are then computed that serve for lithology identification and fluid discrimination and take part in preliminary seismic exploration and reservoir characterization. Therefore, further refinement of these models is required due to changes in burial depths, compaction and overburden pressure, as they provide limitations for reservoirs on porous media. The further refinement using nonlinear direct prestack seismic model is performed on a system computer, which produces a final model of elastic properties. This model can then be applied for lithology prediction and fluid detection to identify potential targets of oil and gas exploration and estimating spots in unconventional shale gas applications.
Owner:CHINA PETROCHEMICAL CORP
Electrode displacement monitoring device and method for resistance spot welding and resistance spot welding device
InactiveCN103292761AEffective control of measurement errorsEffective control of monitoring costsMeasurement devicesObservational errorEngineering
The invention discloses an electrode displacement monitoring device. The electrode displacement monitoring device comprises a tooling arm, two displacement sensing devices and a controller, wherein the tooling arm with a protruding end extending to an electrode side is fixed on a welding equipment body; the two displacement sensing devices are disposed at intervals on upper and lower part of the protruding end of the tooling arm so as to respectively obtain height displacement amount of an upper electrode retaining portion and a lower electrode retaining portion; and the controller is used for receiving the height displacement amount of the two displacement sensing devices, determining and outputting change amount of electrode displacement. The electrode displacement monitoring device has the advantages that measurement error caused by dynamic changes of electrode force can be overcome in real time, cumulative measurement error is small, and no expensive sensing device is needed. Based on the electrode displace monitoring device, the invention further provides a resistance spot welding device using the monitoring device and an electrode displacement monitoring method.
Owner:ZHUZHOU ELECTRIC LOCOMOTIVE CO
Special centering-adjustable ultra-long thin-walled cylinder inner hole precision processing machine and centering-adjustable ultra-long thin-walled cylinder inner hole precision processing method
PendingCN111001837AGuaranteed peace of mindHigh precisionLarge fixed membersPositioning apparatusRotational axisElectric machinery
The invention discloses a special centering-adjustable ultra-long thin-walled cylinder inner hole precision processing machine and a centering-adjustable ultra-long thin-walled cylinder inner hole precision processing method. The special centering-adjustable ultra-long thin-walled cylinder inner hole precision processing machine comprises a first fixed platform and a second fixed platform, whereina movable platform is arranged on the first fixed platform, the displacement stroke distance of the movable platform is 6-7 m, a rotating mechanism and a motor are installed on the movable platform,a centering connecting mechanism is sleeved on a rotating shaft, the other end of the centering connecting mechanism is sleeved with an ultra-long shaft and a cutter disc, bearing seats are arranged at the two ends of the second fixed platform, the ultra-long shaft is sleeved in a bearing, a plurality of support seats are mounted on the second fixed platform, and are used for supporting, positioning and fastening an ultra-long cylinder workpiece, the centering connecting mechanism is formed by respectively connecting two ends of a connecting disc with a connecting shaft sleeve I and a connecting shaft sleeve II and is arranged in a connecting sleeve, and a gap formed between the centering connecting mechanism and the inner surface of the connecting sleeve is 2-6 mm. According to the invention, by adjusting the centering connecting mechanism and the guiding of the left end bearing seat, the centering of the ultra-long shaft in the rotating process is guaranteed, so that the ultra-long cylinder inner hole processing is completed through one-time clamping so as to improve the precision of the processed ultra-long thin-walled cylinder inner hole and improve the qualification rate and the working efficiency.
Owner:湖北双航机电装备科技有限公司
Hypersonic target TBD accumulation detection method through space-time polynomial radon transformation
ActiveCN105717495ARealize detectionAvoid accumulating errorsWave based measurement systemsRectangular coordinatesClassical mechanics
The invention relates to a hypersonic target TBD accumulation detection method through space-time polynomial radon transformation and belongs to the field of radar signal processing and data processing.According to the characteristics that a hypersonic target of the near space is long in distance, ultra high in speed and high in accelerated speed, modeling is conducted on movement of a target azimuth dimension and a radial distance dimension with a polynomial, parameter research is conducted in the azimuth dimension and the radial distance dimension, and energy accumulation is achieved in a parameter space of space-time polynomial radon transformation.By means of the method, TBD accumulation is conducted under a polar coordinate system, the problems that a measuring trajectory topology is seriously deformed under a rectangular coordinate system, and it is difficult for the measuring path topology to be matched with a real trajectory are solved, accumulation is conducted by means of amplitude of signals, the accumulated error brought by radar signal binarization preprocessing conducted by a traditional TBD is avoided, the false-alarm probability is lowered, and real-time performance of detection is improved.
Owner:NAVAL AVIATION UNIV
Uniaxial stretching device used with neutron scattering and experimental method
InactiveCN110333134AStrain rate controlTemperature controlMaterial analysis using wave/particle radiationMaterial strength using tensile/compressive forcesNeutron scatteringBidirectional transmission
The invention provides a uniaxial stretching device used with neutron scattering and an experimental method, which solve the problems in the prior art that strain rate and temperature cannot be controlled respectively, an independent displacement correction function is not provided, and sample installation and external field loading modes cannot be controlled for the characteristics of different materials. According to the technical solution, the uniaxial reciprocating stretching device used with neutron scattering comprises a servo motor, and further comprises a compilable motion controller,a mechanical deceleration mechanism, a bidirectional transmission mechanism, a laser displacement sensor, a tension sensor, a heating cavity, a bidirectional screw, a nut, a dowel bar, a fixture and the like. Strain rate and temperature cannot be controlled respectively; an independent displacement correction function is provided to effectively avoid the accumulative error of mechanical motion; the separated fixture and connecting mechanism are easy to replace during experiment, and can be debugged according to different sample characteristics; and two different stretching modes can also be switched.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Steel grating plate clamping device
The invention relates to a clamping device, in particular to a steel grating plate clamping device which comprises a hook plate, a clamping plate, an installation support, a clamping plate slider, a clamping cylinder, a first clamping rod, a second clamping rod, a third clamping rod, a fourth clamping rod, a sliding chute and a sliding guide block. The sliding guide block is arranged at the front end of the clamping plate and inserted into the sliding chute and can slide in the sliding chute. The front end of the first clamping rod is rotatably connected with the clamping plate slider, the back end of the first clamping rod is respectively connected with the second clamping rod and a cylinder body of the clamping cylinder through a pin shaft, the back end of the second clamping rod is rotatably connected with the installation support, the front end of the third clamping rod is rotatably connected with the clamping plate slider, and the back end of the third clamping rod is connected with the fourth clamping rod and a piston rod of the clamping cylinder through a pin shaft, and the back end of the fourth clamping rod is rotatably connected with the installation support. The steel grating plate clamping device is simple, compact and reasonable in structure; reliable in clamping and capable of avoiding error accumulation; convenient to maintain; and capable of avoiding oil leakage apt to happen due to oil cylinder clamping.
Owner:WUXI WEIHUA ELECTRIC WELDING MFG
A constant velocity universal joint bell shell scraping tool
ActiveCN103273334BAvoid accumulating errorsPrecise positioningPositioning apparatusMetal-working holdersUniversal jointEngineering
The invention provides a constant velocity universal joint bell housing scraping and striking tool which comprises a support and a locating device arranged on the support and used for locating a workpiece. The locating device comprises a standard locating device used for carrying out standard locating on a workpiece, and the standard locating device comprises a workseat disc and a lining structure, wherein the lining structure is arranged on the workseat disc and capable of stretching into and being lined on the inner side wall of a workpiece. According to the constant velocity universal joint bell housing scraping and striking tool, the bottom portion of the inner cavity of the cup body of a bell housing is used as a standard to carry out location, the central hole of the end face of the cup body of the bell housing and the central hole of the end face of a rod portion have an identical machining standard, and accumulated errors caused by secondary standard adjustment are avoided.
Owner:ZHEJIANG ODM TRANSMISSION TECH
Vehicle-mounted AC generator hydraulic drive
Vehicle-mounted AC generator hydraulic drive device, including chassis power take-off, alternator; also includes closed hydraulic pump, hydraulic motor, radiator, displacement flushing valve, hydraulic oil tank and programmable controller; hydraulic pump is connected with chassis power take-off , the oil outlet of the closed hydraulic pump is connected to the oil inlet of the hydraulic motor, the oil inlet of the hydraulic pump is connected to the oil outlet of the hydraulic motor; the oil inlet and outlet of the hydraulic motor are connected to the flushing oil port of the replacement flushing valve, The oil outlet of the displacement flushing valve is connected to the oil inlet of the radiator, and the oil outlet of the radiator is connected to the inlet of the hydraulic oil tank; the outlet of the hydraulic oil tank is connected to the closed hydraulic pump; Connection, the programmable controller is connected with the variable servo valve; the hydraulic motor is connected with the alternator. It keeps the rotational speed of the hydraulic motor driving the generator constant, and the hydraulic motor can be installed at any position of the car, which solves the problem of limited installation space for high-power generators.
Owner:LANZHOU LITIAN TONGCHUANG FLUID CONTROL EQUIPCO
Base station, base station positioning method and corresponding equipment
ActiveCN110784822BHigh precisionCalculation logic is simpleLocation information based serviceCurrent cellEngineering
Owner:GUANGDONG BOZHILIN ROBOT CO LTD
Parallel type multi-freedom artificial limb exoskeleton ankle joint
InactiveCN100558323CIncrease stiffnessAvoid accumulating errorsChiropractic devicesWalking aidsRehabilitation engineeringFoot supports
A parallel multi -free resignation exoskeleton and ankle joint in the field of rehabilitation engineering technology, including: foot support board, imitation human leg jacket, upper platform, lower platform, first active branch chain guide rod, second active branch chain guide guideThe rod and the third active branched chain guide rod, of which: one end of the first active branch chain guide rod is connected to the upper platform activity, the other end is connected to the lower platform activity, and the second active branch chain guide rod is connected to the upper platform activity.The other end is connected to the lower platform activity. One end of the third active chain guide rod is connected to the upper platform activity, and the other end is connected to the lower platform activity.The coat is fixed with the upper platform.The invention agency is rigid, the structure is simple, and the stability is good; the requirements of the human ankle and flexibility are met.
Owner:JIANGSU MASLECH MEDICAL TECH
One-piece complaisant precision positioning platform in three degrees of freedom and parallel redundancy degree in single layer
InactiveCN1332151CEasy to operateExpand the scope of workStands/trestlesWork benchesThree degrees of freedomRange of motion
This invention discloses a kind of single ply parallel connection three degree of freedom one-piece compliance accurate positioning platform that has redundancy. This invention includes base and motion platform. The motion platform and the base are connected by four group compliance positioning amplification frames. The four group amplification frames are in 900 rotating symmetry on the four sides of the motion platform. This invention can achieve nanometer positioning accuracy; the positioning platform has good operationality. It can avoid singular position, solve the coupling problem of input and output and increase its working flexibility. This invention can enlarge the motion scope by using secondary grade or more high level compliance amplification frame.
Owner:SOUTH CHINA UNIV OF TECH
Machining device special for long and large bent-up steel bars of frame box bridge
The invention discloses a machining device special for long and large bent-up steel bars of a frame box bridge. The machining device comprises a machine frame with an operating platform. A fixed formwork is installed on the operating platform. A movable formwork arranged at the position, corresponding to the fixed formwork, of the operating platform is driven by an ejecting device on the machine frame to move forwards and backwards. The working face between the fixed formwork and the movable formwork is of a curved surface structure with the same shape as the long and large bent-up steel bars.The machining device has the advantages of being simple and ingenious in structure and low in manufacturing cost. When the long and large bent-up steel bars are machined, only three operating workersare needed, the once machining and forming efficiency of the steel bars is high, and the design size and code standard can be reached at a time without repeated correction; and compared with a GW40 bending machine, work efficiency can be improved by 10 times or more, accumulative errors of ordinary bending machines in the working process can be avoided, and accidental errors in the manual operation process can also be avoided.
Owner:ZHENGZHOU ENG CO LTD CHINA RAILWAY SEVENTH GRP
Spacecraft inertial navigation method and system based on gravitational field, medium and equipment
ActiveCN111721303AAvoid accumulating errorsNavigation method improvementsInstruments for comonautical navigationGravitational fieldSpacecraft
The invention relates to a spacecraft inertial navigation method and system based on a gravitational field, a medium and equipment. The method comprises the following steps: determining initial parameters; determining the time change rate and the six-dimensional number of geodesic line reference points at the current moment; acquiring actual measurement parameters of the spacecraft at the currentmoment; according to the initial parameters, the time change rate and the six-dimensional number of the geodesic line reference points at the current moment and the actual measurement parameters of the spacecraft at the current moment, calculating the six-dimensional number change amount of the spacecraft relative to the geodesic line reference points at the current moment; and calculating the six-dimensional number of the spacecraft at the current moment according to the six-dimensional number of the geodesic line reference point at the current moment and the six-dimensional number change amount, and taking the six-dimensional number as an initial parameter of the spacecraft at the next moment. On the basis of inertial navigation, a relativistic theory is used for further improving the navigation method, accumulated errors of inertial navigation along with time are avoided, and higher navigation precision is expected to be achieved.
Owner:ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
Gas producer deslagging device
InactiveCN103320169BAvoid accumulating errorsImprove stabilityCombustible gas productionSpacing toothFailure rate
Owner:上海诚达工业炉有限公司
Steel grating clamping device
InactiveCN102941493BPrevent oil spillsSimple structureMetal working apparatusGratingMechanical engineering
The invention relates to a clamping device, in particular to a steel grating plate clamping device which comprises a hook plate, a clamping plate, an installation support, a clamping plate slider, a clamping cylinder, a first clamping rod, a second clamping rod, a third clamping rod, a fourth clamping rod, a sliding chute and a sliding guide block. The sliding guide block is arranged at the front end of the clamping plate and inserted into the sliding chute and can slide in the sliding chute. The front end of the first clamping rod is rotatably connected with the clamping plate slider, the back end of the first clamping rod is respectively connected with the second clamping rod and a cylinder body of the clamping cylinder through a pin shaft, the back end of the second clamping rod is rotatably connected with the installation support, the front end of the third clamping rod is rotatably connected with the clamping plate slider, and the back end of the third clamping rod is connected with the fourth clamping rod and a piston rod of the clamping cylinder through a pin shaft, and the back end of the fourth clamping rod is rotatably connected with the installation support. The steel grating plate clamping device is simple, compact and reasonable in structure; reliable in clamping and capable of avoiding error accumulation; convenient to maintain; and capable of avoiding oil leakage apt to happen due to oil cylinder clamping.
Owner:WUXI WEIHUA ELECTRIC WELDING MFG
BMS system data communication method
PendingCN114221833AReduce communication pressureReduce bus pressureBus networksData acquisitionTime data
The invention relates to a BMS (Battery Management System) data communication method. The method comprises the following steps: allocating different physical addresses to each first level of a BMS three-level architecture; periodic phase offsets are set for the first levels of different physical addresses, so that the period of sending a complete data packet by each first level is distributed in different sampling periods of completing one-time data acquisition by the second level; and the first stage receives the data acquisition request of the second stage, and transmits a simplified data packet or a complete data packet according to the physical address and the periodic phase offset after acquiring the data of the battery pack. According to the BMS system data communication method, the data packet transmission deviation value is simplified, so that the data is greatly reduced, the bus pressure is reduced, the data capacity is reduced, the system response time is prolonged, and the BMS system communication pressure is reduced. Meanwhile, the complete data packet is sent regularly, error accumulation is prevented, the sending period of the complete data packet is homogenized, communication traffic jam is effectively prevented, and the data transmission efficiency is improved.
Owner:SHANGHAI YUYUAN POWER TECH CO LTD
Pedestrian track generation method and device, electronic equipment and storage medium
PendingCN114252068AAvoid accumulating errorsAvoid drift errorNavigational calculation instrumentsGyroscopeControl engineering
The invention discloses a pedestrian track generation method, which comprises the following steps of: if detecting that a step is ended, acquiring a determined historical output course of a previous step end point, a magnetometer output course of the step end point at the moment and a gyroscope output course of the step end point at the moment; determining the current output course of the step end point at the moment by using the historical output course, the magnetometer output course and the gyroscope output course; generating a pedestrian track by using the current output course and the stride distance; according to the method, the current output course of the stride end point at the moment is jointly determined by using the historical output course, and the magnetometer output course and the gyroscope output course of the stride end point at the moment, so that the problem of course output error caused by time or external interference on a single sensor can be effectively avoided; the reliability of pedestrian positioning by using an internal sensor of the electronic equipment is obviously improved; the invention also discloses a pedestrian track generation device, electronic equipment and a storage medium, which have the above beneficial effects.
Owner:ZHEJIANG UNIVIEW TECH CO LTD
Current sensor calibration method and electronic equipment for electric vehicle battery management system
ActiveCN109782210BImproving the Accuracy of Ampere-hour IntegrationAvoid accumulating errorsElectrical measurementsCurrent transducerPower battery
The invention discloses a current sensor calibration method and electronic equipment of an electric vehicle battery management system. The method includes: using a charger to perform multiple charging calibration detections on the power battery detected by the current sensor, and obtaining the charger obtained by each charging calibration detection. The charging capacity difference between the charging capacity and the charging capacity of the management system; calculate the correction error of multiple charging capacity differences; obtain the credibility of the current sensor current adaptive correction coefficient about the correction error; use the current sensor current adaptive correction coefficient to be credible Correct the current sensor current adaptive correction coefficient; use the current sensor current adaptive correction coefficient to correct the current sensor. In the present invention, under the condition of using less BMS resources, the sampling current of the current sensor is corrected online, so as to improve the ampere-hour integral precision. In the present invention, under the condition of using less BMS resources, the sampling current of the current sensor is corrected online, so as to improve the ampere-hour integral precision.
Owner:WM SMART MOBILITY (SHANGHAI) CO LTD
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