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Method for manufacturing metal part solidification structure by non-contact control added material and magnetron metal 3D printing device
ActiveCN105798299ARealize online controlSelectiveAdditive manufacturing apparatusIncreasing energy efficiencyFront edgeElectromagnetic field
The invention discloses a method for manufacturing metal part solidification structure by a non-contact control added material and a magnetron metal 3D printing device. An electromagnetic field is applied in the quick solidification process of metal 3D printing; under the effect of the electromagnetic field, thermocurrent can be generated on a quickly solidified solid / liquid interface; the thermocurrent and the magnetic field are interacted to generate thermal electromagnetic force for triggering flowing of a melt; the end part of a dendritic crystal is shorn after suffering from the effect of the force to cause fragment of the dendritic crystal to form a lot of new crystal nucleus; and on the other hand, the temperature gradient of the front edge of the solid / liquid interface is slowed down through flowing of the melt, so that the constitutional supercooling of two phase regions is increased, the nucleation rate is increased. The method refines grains, improves the morphology of the grains, enables the structure to become uniform and compact, and realizes the structure control of metal 3D printing parts.
Owner:SHANGHAI UNIV
Back-up aid indicator using FMCW chirp signal or a time domain pulse signal
InactiveUS6873250B2Reduce leakageHigh energyAntenna adaptation in movable bodiesAnti-collision systemsTime domainContinuous wave
A back-up aid indication system includes a sensor for providing detection coverage in a predetermined coverage zone behind a vehicle. The sensor includes a transmit antenna adapted for transmitting an RF signal having a quasi-collimated antenna pattern in a near field. The system further includes a waveform generator which selectively provides one of a frequency modulated continuous wave FMCW Chirp signal and a pulse waveform signal as the transmitted RF signal.
Owner:VALEO RADAR SYST
Vacuum glass with mounting holes
ActiveCN102249561AGood brazing performanceEasy to installDoors/windowsClimate change adaptationEngineeringMetal
The invention discloses a vacuum glass with mounting holes, which is compounded from two or multiple glass plates, wherein the peripheries of two or multiple glass plates are mutually sealed hermetically by sealing edges; adjacent glass plates on the inner sides of the sealing edges are vacuumized; the vacuum glass is also provided with mounting holes; and the mounting holes penetrate through thetwo or multiple glass plates and are isolated from vacuum space on the vacuum glass. Since the vacuum glass is provided with the mounting holes, the vacuum glass can be installed and fixed after connecting pieces penetrate through the mounting holes, therefore a high-cost border is not used any more, convenience is brought for the installation of the vacuum glass, and the vacuum glass can be fixed more flexibly. In addition, a plurality of connecting pieces are used for fixing the vacuum glass, so that the section of a metal piece penetrating through the vacuum glass is greatly reduced, heat bridge effect is effectively lowered, and the heat insulation and sound-proof effects of the vacuum glass can be guaranteed. In addition, connecting pieces with the broken bridge heat insulation structure are easy to use, and cost is lower.
Owner:洛阳兰迪真空玻璃科技有限公司
Solar Module with a Frame for Mounting a Solar panel
InactiveUS20100294340A1Improve structural rigidityPrevent rotationPhotovoltaic supportsSolar heating energyComputer moduleEngineering
This invention relates to a frame for mounting a solar panel where a tubular frame member has a generally triangular cross section. The frame member includes a riser element, a span element and a truss element. 5 The frame meets the IEC 61215, Second edition standard for wind and snow loadings without significantly increasing the weight of the solar module compared to conventional frames with an open channel. This invention also relates to an array of solar modules mounted on a structure as well as a method of mounting the frame with a connection channel for slidably accepting an anchor.
Owner:BP CORP NORTH AMERICA INC
Urban rail traffic vehicle braking energy recovery system
InactiveCN101249802AOvercoming Voltage Fluctuation ProblemsEfficient use ofElectrodynamic brake systemsElectric powerCapacitanceCycle control
The invention relates to a system for recovering vehicle braking energy in urban rail transit, which comprises a first direct-current high-speed switch, a charging circuit unit, a super capacitor array, a discharging circuit unit, a variable pressure stabilizing unit, a second direct-current high-speed switch, a DC / AC converter, an alternating-current high-speed switch and an ACU auxiliary control unit; when the vehicle brakes, the system determines the storage energy in the supercapacitor array through the ACU auxiliary control unit and switch with a major loop in real time. Compared with the prior art, the system effectively utilizes energy and reuses the recovered energy in air conditioning or lighting, etc. inside the carriage; the system solves the network voltage fluctuation problem of the prior vehicle regenerative braking energy recovery, and forms an energy recovery closed-cycle control system of the vehicle itself as the main body; in addition, the system cannot impact the network voltage, but only absorb the energy of the self motor train unit; as the supercapacitor used by the system has small size, the management and control of the power source is easier, and the installation mode is more flexible.
Owner:SHANGHAI UNIV OF ENG SCI
Coal mine down-hole foam dedusting system
InactiveCN101251025AEvenly dispersedWill not cause accumulationMixing methodsDust removalFoaming agentCoal
The invention relates to a foam dust removal system used for coal mine underground mining, mainly comprising a fixed quantity addition pump, a foaming agent reservoir, a compressed air pipeline, a clean water pipeline, a foam generator, a foam spray head and so on. By utilization of the prior water pipe in a dust removal place, foaming agents are added into the water pipe by the small-flow fixed quantity addition pump; mixed liquid and compressed air which contain the foaming agents pass through the foam generator simultaneously, and a great amount of foams are generated, conveyed to the foam spray head through a hose, ejected from the foam spray head in the form of an umbrella and cover dust producing points. The invention is particularly suitable for the coal mine underground mining work surface, traveling belt transfer points, a tunnel excavated section or other dust producing points with small space and effectively controls the dust producing sources. The foam dust removal system used has the advantages of simple structure, convenient operation, capability of operating continuously, high dust removal efficiency, no electric elements and safety and reliability.
Owner:CHINA UNIV OF MINING & TECH
RFID (radio frequency identification devices)-assisted subway train position detecting and accurate parking system
InactiveCN102167064ARealize precise parkingMeeting comfort needsCo-operative working arrangementsRoute devices for controlling vehiclesInformation processingLocation detection
The invention discloses a RFID (radio frequency identification devices)-assisted subway train position detecting and accurate parking system which can be used for timely correcting the position detection result of the existing rail transit train. The system comprises a vehicle-mounted reader-writer, a radio frequency antenna, a plurality of ground electronic labels, a train information processing unit and a background main system, wherein the vehicle-mounted reader-writer is arranged at the head of a subway train and is connected with the train information processing unit; the radio frequency antenna is arranged at the center of the bottom at the head of the train and is arranged right above the center line of a track; and the ground electronic labels with different spacing distances are arranged on the center line of the track. After the invention is used, the real-time detection of the subway train position and the accurate parking of the train can be realized, the length of a station can be effectively shortened due to an accurate train parking technology, therefore, the investment cost can be saved, the system can be furthest matched with a screen door of a station, so as to convenient for a passenger to get on and off, and meet the trip comfortableness requirement of the passenger.
Owner:NANJING INST OF TECH
Automobile collision detection method and system based on deep learning
ActiveCN107657237AImprove accuracyImprove recallImage enhancementImage analysisFeature extractionCollision detection
The invention relates to an automobile collision detection method and system based on deep learning. The automobile collision detection system is mainly composed of a video recording device and an image detection system deployed at a server, and is characterized in that the video recording device acquires images around an automobile, positioning and category classification are performed on automobiles emerging in the images by the image detection system deployed on the server, and according to a classification result and the minimum distance between automobile bounding boxes, a warning is given or recording is performed when the minimum distance between the automobile bounding boxes is less than a safety spacing. According to the invention, feature extraction, positioning and classification are performed based on a deep neural network, and the accuracy and the recall rate of image detection are greatly improved compared with those of a traditional computer vision method, so that the automobile collision detection system can perform effective evaluation on driving behaviors of a driver and especially on a scene in which a vehicle driven by the driver has dangerous driving or collision. The automobile collision detection system records relevant images when the distance between vehicle is less than the safety spacing, and has high efficiency, accuracy and practicability.
Owner:SOUTHEAST UNIV
Simulating device for fluid flow safety evaluation of oil-gas pipelines
The invention discloses a simulating device for fluid flow safety evaluation of oil-gas pipelines. The device comprises a multiphase flow circulating system, a separating system, a fluid injecting system and a waste gas recovery system. The device disclosed by the invention emerges on the basis of fully considering the current fluid flow safety hotspot problem and is capable of simulating a low-temperature high-pressure environment to carry out the fluid flow safety evaluation of the oil-gas pipelines, wherein the evaluation content comprises oil-gas pipeline blockage caused by problems such as hydrate and wax deposit and the oil-gas transmission safety problem caused by pipeline corrosion. The device disclosed by the invention is not limited to the evaluation content and can also be used for exploring the research on the evaluation of multi-phase fluid flow regularity, hydrate inhibitor performance and the like. The device disclosed by the invention has the characteristics of reasonable structure, ingenious design, operational flexibility, accuracy in measurement and the like.
Owner:SOUTH CHINA UNIV OF TECH
Outdoor sign support system
InactiveUS6976660B2Flexible installationSturdy in constructionCandle holdersLighting support devicesSupporting systemRelative motion
A system for mounting a sign to a post comprises an elongated channel member adapted to be mounted on a backside of a sign and a bracket adapted to be mounted to a post to which the sign is to be mounted. The bracket has a channel engaging portion adapted to be slidably engaged into the channel member on the backside of the sign. The bracket comprises an endless collar extending along a continuous closed line and adapted to be fitted over the post. The collar defines at least one transversally oriented hole in which a threaded fastener is threadably engaged with a leading end thereof projecting inwardly of the continuous endless collar for exerting a pushing action on the post in order to secure the collar on the post while at the same time drawing the channel member against the post so as to prevent relative movement between the sign and the bracket.
Owner:SIGNALISATION KALITEC
Multi-target tracking and positioning system for indoor parking lot
ActiveCN104697517AAccurate monitoringIncrease flexibilityNavigation instrumentsMulti target trackingEngineering
The invention discloses a multi-target tracking and positioning system for an indoor parking lot, and belongs to the field of multi-target tracking and positioning. The system comprises a UWB positioning system and a vehicle body positioning device, the UWB positioning system comprises a wireless synchronous controller and a wireless positioning base station, and the vehicle body positioning device comprises a vehicle body positioning label, an inertia navigation module, a wireless module and a portable power source module; the data output by the inertia navigation module are sent to an upper computer system through the wireless module, meanwhile, the vehicle body positioning label sends a signal to the wireless positioning base station, the wireless positioning base station transmits the data to the wireless synchronous controller, the wireless synchronous controller sends the signal to an upper computer, and the upper computer system obtains target position data and posture data, determines specific vehicle body position and posture information through fusion operation and sends the information to a mobile client. The combined positioning system breaks through a positioning mode limited by environments in the prior art, and improvement in the aspects of spatiality, real-time performance, quantitative performance and precision is achieved.
Owner:JIANGNAN UNIV
Wind power blade damage monitoring and positioning system based on wireless acoustic emission sensor network
InactiveCN102721741AFlexible deploymentFlexible installationAnalysing solids using sonic/ultrasonic/infrasonic wavesNetwork topologiesExtensibilityData acquisition
The invention relates to the field of wind power blade health monitoring and safety evaluation, and particularly provides a wind power blade damage monitoring and positioning system based on a wireless acoustic emission sensor network. The wind power blade damage monitoring and positioning system based on the wireless acoustic emission sensor network comprises wireless acoustic emission sensor nodes (1), cluster nodes (2), a network management converging node (3) and a monitoring center, the wireless acoustic emission senor nodes (1) acquire blade crack data, the cluster nodes (2) carry out relay transmission of the data, and the network management converging node (3) converges the data. Advantages of a wireless sensor network and advantages of acoustic emission technology are combined, the damage monitoring and positioning system which is applied to wind power blades and is flexible in arrangement, high in extensibility, convenient to install and maintain and sensitive in crack sensing is built, and problems that acquisition points are installed and maintained difficultly, cost is high, extensibility is poor and the like in a traditional cable arranging process are solved. In addition, the wind power blade damage monitoring and positioning system is simple in integral arrangement, flexible in installation and convenient and quick to use.
Owner:UNIV OF SCI & TECH BEIJING
Attachment means for facilitating user access to vehicle platforms
InactiveUS6994362B2None of methods is secureEasy accessSupplementary fittingsSteps arrangementEngineeringTread
Improved selectively rotatable multipositionable step attachment for a vehicle platform and the like for not only facilitating safe user access to the platform, for loading and unloading same, when the step attachment is in an operative position, but also when it is in a non operative or stowage position for facilitating additional use of the platform such as for towing another platform or for facilitating attachment of an auxiliary platform to the vehicle platform. The step attachment is generally made up of a support bar, a rotatable step tread of L-shaped configuration, a multiappatured index plate concentrically affixed to the outer end of either the support bar or the rotatable step tread, and a device to fasten the step assembly to the vehicle platform. Depending on the various requirements of the step attachment when being connected to a vehicle platform and the like, various mounting arrangements are provided.
Owner:FOSTER ALLAN EUGENE
Intelligent method and device for controlling elevator based on distributed multipath CAN bus
An intelligent elevator controlling method and device based on distributed multi-channel CAN bus is disclosed. Said device is composed of a cluster operating controller, single-elevator controllers communiated with said cluster operating controller via CAN bus, and the cage controllers, floor calling controllers, LCD controllers and speech floor reporting controllers respectively for each of elevators. Its control method is also disclosed.
Owner:WUHAN UNIV OF TECH +1
Full automatic intelligent measuring apparatus for gelatineous layer of mixed coal and measuring method thereof
InactiveCN1963387AImprove the accuracy of measuring displacementReduce pressure measurement errorsFlow propertiesObservational errorMeasurement device
This invention relates to coal glue layer total automatic measurement device, which comprises computer, input and output data card, automatic heating temperature control part, smoke volume measurement, probe upper and down drive structures, probe rotation part and pressure automatic measurement, wherein, its uses volume measurement part to judge coal sample volume at peak or trough and to start probe drive structure for coal layer measurement through line step motor impulse sequence to determine coal layer upper and down layer position then uses OLS to match upper and down list layer change curve to get maximum thickness values.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
Converter-based low voltage ride through control system of wind generating set
ActiveCN102005779ANo impactQuick responseSingle network parallel feeding arrangementsWind energy generationPower inverterLow voltage ride through
The invention relates to a converter-based low voltage ride through control system of a wind generating set, comprising a converter, a converter controller and a low voltage ride through main controller, wherein the converter and an auxiliary circuit breaker are connected in series to form a controlled branch circuit; a main circuit breaker between the wind generating set and a grid is connected in parallel with the controlled branch circuit; a direct current positive electrode bus bar and a direct current negative electrode bus bar are arranged between a rectifier and an inverter; a capacitor and an unloading resistor are connected between the direct current positive electrode bus bar and the direct current negative electrode bus bar; the unloading resistor and the capacitor are connected in parallel; the unloading resistor and a controlled valve are connected in series; the controlled valve is connected with the converter controller; a grid end is connected to an alternating current voltage detector; a direct current voltage detector is connected between the direct current positive electrode bus bar and the direct current negative electrode bus bar; the alternating current voltage detector and the direct current voltage detector are both connected with the low voltage ride through main controller; and the low voltage ride through main controller is connected with the converter controller, the main circuit breaker and the auxiliary circuit breaker. The invention is effectively adapted to occasions where the depth voltage dips and has favorable stability.
Owner:ZHEJIANG WINDEY
Road abnormal parking early warning method based on vehicle to vehicle communication and implementation system thereof
InactiveCN104392621AImprove securityPrevent early warning failureAnti-collision systemsEarly warning systemMobile vehicle
The invention discloses a road abnormal parking early warning method based on vehicle to vehicle communication and an implementation system thereof, the early warning method includes: using a positioning module to obtain the position information of the moving vehicle; when the vehicle parks for abnormal state, using a wireless communication module for sending abnormal warning message; receiving the abnormal warning message through the wireless communication module by the vehicle moving normally; early adjusting after receiving the abnormal warning voice prompt and text display information by the vehicle moving normally, steering clear of the vehicle having abnormal state. The road abnormal parking early warning system comprises a main controller and a positioning module connected to the main controller for obtaining the position information of the moving vehicle, the wireless communication module used for sending or receiving the abnormal warning message, the voice prompt and voice broadcast module used for the abnormal warning message, and the display module used for displaying the text for the abnormal warning message. The vehicle can send the warning message while parking for abnormal state for reminding the nearby vehicles for adjusting early.
Owner:CHANGAN UNIV
Split air-conditioner indoor unit
InactiveCN102022781AIncrease the areaReduce the overall heightPump componentsLighting and heating apparatusBusiness efficiencyHigh energy
The invention discloses a split air-conditioner indoor unit, which comprises an upper shell arranged on the body. A heat exchanger, a cross flow wind wheel and an air duct for accommodating the heat exchanger and the cross flow wind wheel are arranged in the upper shell; the upper shell is provided with an air inlet and an air outlet which are communicated with the air duct, the air duct comprises a left air duct and a right air duct, the front of the upper shell is provided with a front panel, and a middle partition plate is arranged in the upper shell; the left air duct is encircled by the upper shell, the front panel, the middle partition plate and a left volute of a left cross flow wind wheel together; a left heat exchanger, the left cross flow wind wheel and a left volute tongue of the left cross flow wind wheel are arranged in the left air duct; the right air duct is encircled by the upper shell, the front panel, the middle partition plate and a right volute of a right cross flow wind wheel together; and a right heat exchanger, the right cross flow wind wheel and a right volute tongue of the right cross flow wind wheel are arranged in the right air duct. The split air-conditioner indoor unit has the characteristics of simple and reasonable structure, small integral volume, high energy efficiency ratio, flexible installation mode and wide application range.
Owner:GUANGDONG MIDEA ELECTRIC APPLIANCES CO LTD
Direct forming manufacturing method of metal-based multilayer/gradient composite board and process unit of direct forming manufacturing method
ActiveCN105643215AHigh bonding strengthEliminate surface stressRoll force/gap control deviceMetal rolling arrangementsHigh energyBound property
The invention discloses a direct forming manufacturing method of a metal-based multilayer / gradient composite board and a process unit of the direct forming manufacturing method. Scale, corrosion materials and other impurities on the joint surface of a base board are removed through chemical cleaning, the cleaned surface is subjected to gradient power electromagnetic induction heating or laser bombardment surface treatment, all phases near the joint surface are fully dissolved, a solid solution is enhanced, toughness and corrosion resistance are improved, the surface stress of the board is eliminated, and surface laser treatment is conducted to improve the binding property of a composite layer; raw materials of the composite layer are added and injected through powder laying, a high-energy heat source is adopted for irradiation or induction heating to melt powder, metallurgical bonding is formed between the composite layer and a base, and control over the final shape of a cold / hot-rolled board is conducted. The obtained multilayer / gradient composite board is compact in surface structure, bonding between the composite layer and the base and between layers is good, and the interlayer bonding performance of the composite board is remarkably improved. The process is high in flexibility, and the production period of the metal-based composite board can be greatly shortened after the process is combined with an existing continuous casting technology.
Owner:SHANGHAI UNIV
Locating and mounting method for H-shaped steel girder butting joints
ActiveCN106193622AFirmly connectedEliminate lateral misalignmentBuilding material handlingFlangeH shaped
Owner:CHINA FIRST METALLURGICAL GROUP
Household non-contact sleeping monitoring device and method
InactiveCN103006223ABreathing signal monitoringOvercoming deficits in normal sleepRespiratory organ evaluationRadarEngineering
The invention discloses a household non-contact sleeping monitoring device and a household non-contact sleeping monitoring method. The device comprises a transmitting antenna, a receiving antenna, a non-contact biological radar front end and a DSP (Digital Signal Processor), wherein the non-contact biological radar front end is used for transmitting a pulse sequence signal to the chest wall of a sleeper in an oriented way through the transmitting antenna; the receiving antenna is used for picking up a reflected echoed signal including breathing information of the sleeper; the reflected echoed signal is output to the DSP through relevant detection and variable delay processing; and the DSP is used for performing steps such as preprocessing, breathing characteristic vector extraction and cluster analysis on a breathing signal of the sleeper to realize automatic recognition and control of a breathing mode. According to the device and the method, a sound and light alarm can be made on the premise of not influencing normal sleeping of a human body, so that the sleeper who stops breathing temporarily is forced to wake up.
Owner:FOURTH MILITARY MEDICAL UNIVERSITY
Warehouse roadway automatic guided vehicle navigation device based on swing single-line laser radar
ActiveCN104793619ASimple structureFlexible installationPosition/course control in two dimensionsCloud computingVisual field loss
The invention provides a warehouse roadway automatic guided vehicle navigation device based on swing single-line laser radar. The device comprises a laser radar swing control module, a three-dimensional point cloud data collection module and a vehicle navigation control module, the three-dimensional point cloud data collection module comprises the single-line laser radar, a motor and a rotating mechanism, the single-line laser radar serves as collection equipment for point cloud data, the motor and the rotating mechanism provide power for swinging of the single-line laser radar to realize a function of splicing planar point cloud to form three-dimensional space point cloud, the laser radar swing control module is responsible for receiving a control instruction of the vehicle navigation control module and a control task of the motor, and the vehicle navigation control module sends a swing control order to the laser radar swing control module according to current working state, receives and processes point cloud data and calculates according to current visual field point cloud to acquire position of an automatic guided vehicle so as to realize automatic positioning. The warehouse roadway automatic guided vehicle navigation device is simple in realization, high in performance-cost ratio, high in practicability and suitable for automatic guiding of warehouse roadways of various types.
Owner:SHANGHAI JIAO TONG UNIV
Embedded vision detecting system
InactiveCN101393010AReduce complexityReduce weight and sizeImage analysisUsing optical meansFar distanceImage transfer
The invention relates to an embedded vision detection system, which is provided with a multi-state power control unit, an image acquisition control and preprocessing unit, an image analysis unit and a human-computer interactive unit, wherein the operation of the system starts from the image acquisition control and preprocessing unit which is communicated with the human-computer interactive unit through a control bus and an image transmission bus (DMA mode) and is communicated with the image analysis unit through the control bus and a DSP video interface VIP; simultaneously the image analysis unit and the human-computer interactive unit interact information and are connected with each other through a parallel interface HPI; and the multi-state power control unit supplies mains voltage to the modules. Compared with the prior art, the embedded vision detection system integrates the characteristics of a PC vision system and an intelligent camera, shows both the high performance and the human-computer interactive ability, can simultaneously meet different applications of high real-time object detection, medium real-time object detection, high-resolution object detection, medium-resolution object detection, medium-distance object detection and far-distance object detection in the aspect of input by various video interfaces provided by the system, and can be completely used for high-complexity detection of objects in a high-speed flow line and output of the detection results.
Owner:张育民
Static mixed rotational flow separation and extraction process of regenerative base oil N-methyl pyrrolidone
The invention relates to a static mixed rotational flow separation and extraction process of regenerative base oil N-methyl pyrrolidone, comprising the following steps in sequence: (a) carrying out sedimentation of used oil and removing moisture and solid impurities; (b) filtering by a filter, and removing tiny solid particles and colloids; (c) adding sodium hydroxide solution and flocculating; (d) removing floccules and residual sodium hydroxide solution; (e) carrying out reduced pressure distillation by a distiller, and collecting distillate oil; (f) mixing the distillate oil with organic solvent by a static mixer on line; (g) separating out raffinate oil and raffinate oil containing organic solvent from mixed liquor by a swirler; (h) carrying out the reduced pressure distillation on the raffinate oil by a climbing film evaporator, and removing the organic solvent in the raffinate oil; and (i) carrying out the reduced pressure distillation by a molecule (short range) distiller, removing residual organic solvent and peculiar smell gas, and obtaining the regenerative base oil. The separation and extraction process provided by the invention has the advantages of conciseness in procedure, safety in operation, less equipment investment, high product yield, energy conservation, environmental friendliness and the like.
Owner:ANHUI GUOFU LUBRICANT IND
Step force generating device for dynamic calibration of force sensor
ActiveCN106706207AAchieving Negative Step ForceAchieving Negative Step TorqueApparatus for force/torque/work measurementForce/torque/work measurement apparatus calibration/testingContact timeEngineering
The invention provides a step force generating device for dynamic calibration of a force sensor, wherein the step force generating device is suitable for dynamic calibration experiment of a force sensor having an irregular tool structure of a load terminal or needing to carry out loading of a plurality of directive forces / torques. The step force generating device comprises a calibration table, a directional loading assembly, a steel force transmission wire, a force source, a pulley suspension system, an impact shearing device and a step edge detection circuit. A stable load is applied to a force sensor by using the directional loading assembly based on steel wire force transmission; and the steel force transmission wire is impacted and sheared suddenly to carry out step unloading on the force sensor to realize negative step excitation on the force sensor. The impact shearing device uses a high-speed and large-impact-force impact cylinder as an impact execution mechanism to extend a dynamic calibration frequency and a load range of the force sensor. With cooperation of an impact gasket block, the disturbance during the impact shearing process can be suppressed, so that the dynamic calibration precision can be improved. The step edge detection circuit obtains step edge time based on starting steel force transmission wire contact time by a detection impact head and a steel force transmission wire shearing time.
Owner:HEFEI UNIV OF TECH
Capacitance tomography sensor
ActiveCN104655692AFlexible installationAvoid direct contactMaterial capacitanceTomographyBiomedical engineering
A capacitance tomography sensor is provided in the invention, wherein a sensor framework is added to the capacitance tomography sensor. A measurement electrode is arranged on an inner wall of the sensor framework to prevent direct contact between the measurement electrode and a to-be-test fluid. A shield electrode group is disposed on an outer side surface of the sensor framework to achieve electrical insulation from the measurement electrodes. By means of the structure, installation of the measurement electrode and the shield electrode group is more flexible.
Owner:INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
Composite rainwater power generation device based on mini water bucket and PVDF film piezoelectric technology
ActiveCN103343725AImprove flexibility and universalityEasy to makePiezoelectric/electrostriction/magnetostriction machinesHydro energy generationAutomatic controlMagnet
The invention provides a composite rainwater power generation device based on a mini water bucket and a PVDF film piezoelectric technology, and belongs to the field of hydroelectric generation. The device solves the problems that an existing rainwater power generation device is high in cost and complex in installation and debugging. The device comprises a water level automatic control unit arranged on a water inlet of a rain drainage pipeline, a mini water buckle power generation unit arranged under the water level automatic control unit, and a PVDF piezoelectric module power generation unit arranged on a water outlet of the rain drainage pipeline. The water level automatic control unit comprises a floating ball, a V-type connecting rod, a partition board with a through hole, a valve and a magnet, wherein the V-type connecting rod is fixed to the inner side wall of the rain drainage pipeline, the lower portion of the V-type connecting rod is provided with the partition board with the through hole, and the valve is matched with the through hole in the partition board to control flowing and stopping of rainwater. The mini water bucket power generation unit comprises a mini water bucket hub, m mini water bucket vanes, a driving wheel, a driven wheel, a belt and a water bucket power generation circuit. The PVDF piezoelectric module power generation unit comprises a PVDF piezoelectric film and a PVDF power generation circuit.
Owner:HARBIN INST OF TECH
Method for computer to identify vehicle type by video image
InactiveCN103020582AAccurate identificationFlexible installationCharacter and pattern recognitionFeature extractionKey frame
The invention discloses a method for a computer to identify a vehicle type by a video image. The method is characterized by comprising the following steps of: (1), acquiring a video image by a computer and extracting a target key frame from the video image, exacting a target region to be identified through wiping out background, and pre-processing the video image; (2), carrying out feature extraction on the pre-processed image, selecting an Hu geometric moment invariant in the image shape characteristic as a vehicle characteristic parameter, and calculating the shape characteristic of the target region; and (3), carrying out sample training of all vehicle types through a machine learning method, and carrying out classified predication on the target region to be identified after the sample training is finished so as to identify the vehicle type. The method can semi-automatically classify the vehicle types, so that the classifying accuracy is improved as much as possible.
Owner:SUZHOU LIANGJIANG TECH
Stretchy type solar photovoltaic assembly and photovoltaic system
InactiveCN103378191AIncrease power generationOptimized use of support surfacesPhotovoltaic energy generationSemiconductor devicesEngineeringSolar cell
The invention discloses a stretchy type solar photovoltaic assembly and a photovoltaic system. The stretchy type solar photovoltaic assembly comprises a fixed support and a plurality of layers of solar cell panels, wherein the fixed support is fixed on a supporting face. The fixed support comprises track support bodies. Each track support body comprises a plurality of layers of tracks. The solar cell panels are installed on the tracks. At least one solar cell panel can be stretched out and drawn back in the stretching direction of the track where the solar cell panel is located. The photovoltaic system comprises a carrier and the stretchy type solar photovoltaic assembly which is installed on the top face of the carrier. According to the stretchy type solar photovoltaic assembly, when the solar cell panels are drawn back, the size of the stretchy type solar photovoltaic assembly is effectively controlled, and convenience is brought to carry; when the solar cell panels are stretched out, large-area solar cell panel installation is achieved in a limited supporting face area, the insolation area of the stretchy type solar photovoltaic assembly is effectively improved, and therefore the generated energy of the stretchy type solar photovoltaic assembly is improved.
Owner:DU PONT APOLLO
Novel sideward coupling optical fiber component and processing method thereof
ActiveCN101520530ALateral coupling stabilityReliable lateral couplingCoupling light guidesCouplingLight beam
The invention relates to a novel sideward coupling optical fiber component which comprises a first baseplate, an optical fiber and a second baseplate, wherein one surface of the first baseplate is provided with at least one groove; the optical fiber is arranged in the groove; the second baseplate is arranged on the first baseplate and covers the optical fiber; one end of the optical fiber, which is arranged between the first baseplate and the second baseplate, is provided with a bevel, and the bevel is used for performing perfect reflection of beam transmitted in the optical fiber.
Owner:WUHAN TELECOMM DEVICES
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