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Communication optimization method and device for IRS auxiliary communication system
ActiveCN110839204AHigh precisionImprove communication performanceTransmission monitoringLocation information based serviceCommunications systemReal-time computing
The invention discloses a communication optimization method and device for an IRS auxiliary communication system. The communication optimization method comprises the steps of determining an initial position of UE taking the initial position of the UE as a sphere center, and taking a reference position in the space sphere; determining a preliminary channel and a reference channel between the UE andthe IRS according to the preliminary position of the UE and the distance between the reference position and the IRS position; determining a channel between the AP and the IRS according to the distance information between the position of the AP and the position of the IRS; determining a preliminary matrix and a reference matrix of the IRS according to the preliminary channel and the reference channel between the UE and the IRS and the channel between the AP and the IRS; realizing communication between the AP and the UE based on the preliminary matrix and the reference matrix of the IRS, determining channels corresponding to different reflection coefficient matrixes of the IRS, and selecting the matrix with the maximum channel strength as an optimal matrix; and realizing effective communication between the AP and the UE based on the optimal reflection coefficient matrix. According to the invention, the optimization of the IRS auxiliary communication system is realized.
Owner:武汉瑞斯通信科技有限公司
Device for detecting moisture content of lubricating oil and detection method thereof
InactiveCN103837497AHigh sensitivityAvoid the disadvantages of unobvious detection signalMaterial analysis by optical meansEngineeringMoisture
The invention discloses a device for detecting the moisture content of lubricating oil and a detection method thereof. The device comprises a platform, an infrared emission assembly, a light receiving assembly, a signal processing assembly, a signal acquisition and transmission assembly and an external oil conveying pipe, wherein the middle section of the external oil conveying pipe is fixed in the platform, and two ends of the external oil conveying pipe are connected with a lubricating oil pipeline; the light receiving assembly is connected in series with the signal processing assembly and the signal acquisition and transmission assembly in sequence; a super-hydrophilic and super-oleophobic coating layer is coated in a detection region at the bottom of the external oil conveying pipe, so that a super-hydrophilic and super-oleophobic filter film is formed in the detection region. By adopting the super-hydrophilic and super-oleophobic coating layer, when flowing through the detection region of the external lubricating oil pipeline, oil liquid continues to flow through the pipeline under the action of the super-hydrophilic and super-oleophobic filter film, and water droplets permeate the filter film and are gathered in the detection region; therefore, the shortcoming that a detection signal generated by the fact that a single water droplet passes through the detection region is not obvious is overcome; the sensitivity of the detection device is improved, so that a detection result is accurate.
Owner:DALIAN MARITIME UNIVERSITY
Distributed optical fiber monitoring system for tunnel surrounding rock deformation and construction and monitoring methods thereof
The invention discloses a distributed optical fiber monitoring system for tunnel surrounding rock deformation and construction and monitoring methods thereof. The monitoring system is composed of a first sensor, a second sensor, and an information system. The first sensor and the second sensor can be connected in series and then connected with the host interface of the information system to form a closed loop. According to the construction method, sensing fibers are symmetrically arranged in four grooves in the outer wall of a hollow circular pipe to form vertical and horizontal sensing loops, and sensors are embedded into pre-excavated trenches in the surrounding rock of a tunnel. According to the monitoring method, the vertical displacement distribution of the sensors can be calculated by performing differential and integral operations on the strain of the two fibers in the symmetrical first and second grooves of the hollow circular pipe. Distributed monitoring and real-time and advance monitoring are adopted. The data is stable and reliable. The cost is low. The monitoring system is suitable for dynamic real-time monitoring of the vertical and horizontal deformation of the surrounding rocks of existing highways under tunnels, tunnels, office buildings and other structures, and in influence areas of buildings.
Owner:云南大永高速公路建设指挥部 +1
Full-link optical satellite geometrical imaging model construction method and full-link optical satellite geometrical imaging model construction system
ActiveCN110030978AHigh precisionImprove uncontrolled absolute positioning accuracyImage analysisPhotogrammetry/videogrammetryObject pointRelative motion
The invention provides a full-link optical satellite geometrical imaging model construction method and a full-link optical satellite geometrical imaging model construction system. The method comprisesthe following steps: determining a relative motion relation between an imaging exploration element and an observation site object point, and based on relative motion speed of an imaging image point to an observation earth surface, constructing an aberration error correction model of a satellite image light direction; based on an atmospheric subdivision mode, calculating geometrical positioning error caused by multiple layers of atmospheric refraction, obtaining an actual side-view angle of an exploration element light after the atmospheric refraction error is corrected, and based on a side tilt angle and an angle of pitch of updated imaging light under a satellite orbit coordinate system, constructing the atmospheric refraction error correction model of the satellite image light direction; according to the aberration error correction model and the atmospheric refraction error correction model, performing fine treatment for a conventional geometrical model, and constructing a fine geometrical imaging model in which atmospheric refraction and aberration error correction are considered. The model provided by the invention can reflect a mapping relation between the image point coordinate of a high-resolution optical remote sensing satellite image and a ground point coordinate more precisely.
Owner:WUHAN UNIV
Solar power generation device
ActiveCN105068560AStable trackingImprove utilization efficiencyPhotovoltaic supportsControl without using feedbackElevation angleMotor drive
The invention discloses a solar power generation device, comprising a base, an azimuth rotation module, an elevation angle tracking module, a photoelectric module and a control unit. The azimuth rotation module comprises a first motor, a first transmission module, a rotating disk and a bracing frame, wherein the first motor drives the rotating disk to rotate on the base through the first transmission module; the upper end of the bracing frame is in connection with the photoelectric module. The elevation angle tracking module comprises a second motor and a secondary transmission module, wherein the second motor is arranged on the rotating disk; the secondary transmission module is in connection with the photoelectric module; the second motor drives the photoelectric module to rotate through the secondary transmission module, and the control unit controls the first motor and the second motor to work. The control unit controls the first motor and the second motor to work; elevation angles and azimuths can be adjusted in real time, solar rays are allowed to irradiate the photoelectric module to the extent possible, the sun locus can be stably traced yearly under all weather, and solar energy utilization efficiency can be improved.
Owner:XIAMEN UNIV OF TECH
Sunlight reflecting spotlight sun-fixing positioning sensor and tracking drive device
InactiveCN101893897AAccurate reflectionAccurate trackingPosition/direction controlSunlightSEMI-CIRCLE
The invention relates to a sunlight reflecting spotlight sun-fixing positioning sensor and a tracking drive device, and belongs to the technical field of application of solar energy. The invention consists of the sunlight reflecting spotlight sun-fixing positioning sensor and a sunlight reflecting spotlight tracking drive mechanism connected with the sunlight reflecting spotlight sun-fixing positioning sensor by a rotary main shaft (17); the sunlight reflecting spotlight sun-fixing sensor consists of a sun-fixing aiming sensor (18), and a normal incidence and reflection converter (12); and the sunlight reflecting spotlight tracking drive mechanism consists of a semi-circle driving wheel (16), a sunlight reflecting mirror (13) arranged on a support of the semi-circle driving wheel (16), a rubber driving wheel (14) arranged below the semi-circle driving wheel (16) and a DC geared motor (15) connected with the rubber driving wheel (14). The Sunlight reflecting spotlight sun-fixing positioning sensor and the tracking drive device have the advantages of simple structure, low cost, no limitation to positions, directions and angles, precise tracking and extremely high power consumption, and can be applied to medium-and high-temperature solar energy heat-concentration.
Owner:YUNNAN NORMAL UNIV +3
Solar cooking device
ActiveCN101576319AIncrease profitGood cooking effectSolar heating energySolar heat devicesEngineeringEnergy conservation
The invention discloses a solar cooking device, and aims to provide a solar cooking device which has the advantages of energy conservation, high efficiency, simple structure and easy implementation. The solar cooking device comprises a shell (1) and a cover body (2), wherein the cover body (2) is movably connected with the shell (1), a heat preservation cover plate (4) is arranged between the shell (1) and the cover body (2), a plurality of heat absorption mess tins (5) are arranged in the shell (1), and the inner surface of the shell (1) and the outer surfaces of the heat absorption mess tins (5) are coated with a heat absorption coating. The solar cooking device can be widely applied to the fields of cooking foods for family, camping and marching.
Owner:ZHUHAI DOUBLE HAPPINESS ELECTRIC APPLIANCE
Surface reflectance correction method and device based on remote sensing image
InactiveCN113008834ASimple methodAccurate reflectionScattering properties measurementsReflectivityRemote sensing
The invention provides a surface reflectance correction method and device based on a remote sensing image. The method comprises the steps of: according to the remote sensing image of an original region,obtaining an observation zenith angle and a solar zenith angle corresponding to each pixel in the remote sensing image and obtaining original surface reflectance corresponding to the remote sensing image; based on a pre-constructed BRDF model, obtaining a BRDF correction factor corresponding to each pixel according to the nadir direction and the observation zenith angle and the solar zenith angle corresponding to each pixel; and obtaining corrected surface reflectance corresponding to each pixel according to the BRDF correction factor corresponding to each pixel and the original surface reflectance corresponding to the remote sensing image. According to the surface reflectance correction method and device based on the remote sensing image, the corrected surface reflectance corresponding to each pixel can more accurately reflect the reflection condition of the surface of the target area, and the method for obtaining the corrected surface reflectance corresponding to each pixel is simple and efficient.
Owner:CHINA AGRI UNIV
Wafer
ActiveCN101383339AGuaranteed widthIncrease production quantitySemiconductor/solid-state device detailsSolid-state devicesCrystal orientationEngineering
A wafer having a device region, where a plurality of devices is formed, and an outer peripheral surplus region, which surrounds the device region, on the face of a circular wafer substrate is disclosed. A chamfered portion whose cross-sectional shape defines an arc-shaped surface in a range from the face to the back of the wafer substrate is formed in an outer peripheral end portion of the outer peripheral surplus region of the wafer substrate. A flat surface orthogonal to the face and the back is formed in the chamfered portion as a mark showing the crystal orientation of the wafer substrate. An identification code for specifying the wafer substrate is printed on the flat surface.
Owner:DISCO CORP
Communication network based on master/slave architecture for connecting sensors and actuators
InactiveCN1961534AReduce wiringAccurate reflectionBus networksControl signalStructure of Management Information
A communications network for servo systems and the like comprises a controller (5; 6; 48), first and second slave nodes (20, 25; 19, 26; 52, 62) configured to respond to control signals from the controller and to send respective feedback control signals to the controller, and a control signal transmission line (18, 24; 17, 23; 54, 62) between the controller and the slave nodes; wherein communication between said controller and said slave nodes employs reflective signaling, and wherein the transmission line incorporates a router (9; 8; 60) configured to route control signals from said controller to one or other of said first and second slave nodes in dependence on a further signal from said controller.
Owner:NEW TRANSDUCERS LTD
Reflector and light source apparatus having reflector
ActiveCN1611831AEfficient coolingAccurate reflectionPoint-like light sourceProjectorsDistortionOptoelectronics
A reflector according to the present invention can certainly reflect light emitted from a lamp in a desired direction without producing distortion in a reflection surface by specifying the distance between a projection portion and a back side end portion of the reflection surface of a reflector to be in the optimal range. The reflector, having a front side opening portion, a back side opening portion and a reflection surface, the reflector comprises a projection portion provided in an inner surface of the reflector, wherein, the projection portion is formed in an area at a 2.5 mm or more distance from a back side end portion of the reflection surface toward a back side.
Owner:USHIO DENKI KK
Image direct output device
The invention discloses an image direct output device. The image direct output device comprises an outer shell, a light source set, a digital microchip device and a projecting lens. The light source set is provided with a light source, a light guiding column and a miniature lens set. The digital microchip device is used for collecting miniature light beams of the light source set and is provided with a stationary-type color wheel and a minitype reflecting mirror set. The stationary-type color wheel is used for conducting color separation and color filtering on the light source and is provided with a plurality of color blocks. The minitype reflecting mirror set is arranged on the side, different from the light guiding column, of the miniature lens set and is used for receiving the light source which is processed by the stationary-type color wheel. The projecting lens is used for receiving an output light source of the digital microchip device and enabling the output light source to be shot out of the outer shell. The image direct output device which can effectively lower needed cost and time is provided.
Owner:BOHHEN OPTRONICS
Photoelectric energy high-rate concentrating power generation system
InactiveCN102005969AAvoid direct exposurePower generation effect is goodPhotovoltaicsPhotovoltaic energy generationHigh rateSmall footprint
The invention relates to a photoelectric energy high-rate concentrating power generation system. The system is composed of a concentrator cell arranged on the upper end of a support and a flat reflector arranged on the lower end of the support, wherein a condensator is arranged in the middle of the support and between the concentrator cell and the flat reflector; and an adjustable expansion link is arranged on the support between the concentrator cell and the condensator-positive lens. The concentrator cell component of the invention consists of 200-400 of small cubes, the focusing time is 500, the voltage of the cell is 2.71V, the current is 6.61A, and the power is 17.9W. The power generation system has the advantages of less material, high generating efficiency, low cost, small floor space, long service life, simple and convenient preparation method and high yield. The flat reflector can be adjusted up and down, left and right or at another angle, thus the solar ray can be reflected accurately and focused onto the concentrator cell through the concentrator.
Owner:叶金来 +1
Reflecting mirror assembly, solar photo-thermal power generation heliostat frame and installation method of solar photo-thermal power generation heliostat frame
PendingCN109631363AHigh strengthAbility to add flat stateSolar heating energySolar heat collector detailsResistHeliostat
The invention belongs to the technical field of photo-thermal power generation equipment, and particularly relates to a reflecting mirror assembly, a processing method of reflecting mirror, a solar photo-thermal power generation heliostat frame and an installation method of a solar photo-thermal power generation heliostat frame, wherein the reflecting mirror assembly comprises the reflecting mirror, a mounting beam set, a reinforcing assembly and at least three fixing blocks arranged on the back surface of the reflecting mirror, each fixing block is fixedly connected with the mounting beam set, and the reinforcing assembly is arranged on the back surface of the reflecting mirror and is used for increasing the strength of the reflecting mirror. In the reflecting mirror assembly, the reinforcing assembly is arranged on the back surface of the reflecting mirror, and the reinforcing assembly increases the strength of the reflecting mirror, increases the ability of the reflecting mirror tomaintain the planar state, and avoids or reduces the deformation of the reflecting mirror caused by the influence of gravity; and meanwhile, in the using process, the ability of the reflecting mirrorto resist natural wind can be enhanced, and the deformation of the reflecting mirror caused by the natural wind is avoided or reduced. The reflecting mirror can accurately reflect sunlight onto a heatabsorption tower.
Owner:龙岩智康太阳能科技有限公司
A device for identifying certain pointing information or image-text information
InactiveCN109657520AEasy to useAccurate reflectionCharacter and pattern recognitionElectrical appliancesInfraredComputer science
The invention discloses a device for identifying certain pointing information or image-text information. The system comprises a photographing module and a monitoring module. the photographing module comprises a camera; when the monitoring module is triggered; the pointing information or image-text information identification equipment shoots downwards through the camera to obtain a book image to shoot and identify the book; the monitoring module comprises an infrared or ultrasonic monitoring unit; the infrared or ultrasonic monitoring unit is an infrared or ultrasonic transmitting and receivinggroup; wherein the triggering of the monitoring module comprises triggering by transmitting and receiving reflected infrared rays or ultrasonic waves through the infrared or ultrasonic monitoring unit, the infrared or ultrasonic monitoring unit comprises a first infrared or ultrasonic monitoring unit, and the monitoring distance of the first infrared or ultrasonic monitoring unit is adjustable. Implementation of the embodiment of the invention is favorable for identifying the pointing point of a hand on a book or identifying which book or page.
Owner:陈旭
Polarization tomography microscopic imaging device and method
ActiveCN103134756BAccurate reflectionReflection realPolarisation-affecting propertiesMicroscopic imageBeam splitter
The invention discloses a polarization tomography microscopic imaging device and method. The device comprises: a laser, a polarization generator, a half mirror, a microscopic objective lens, a first beam splitter, a second beam splitter, a third Beam splitter, quarter wave plate, first Stokes system, second Stokes system, third Stokes system, fourth Stokes system, data acquisition module, computer, drive Module and X-Y scanning platform for installing the sample to be tested. The invention can obtain all-round polarization information of the sample to be tested, can detect and microscopically image the polarization states of different layers of the object, and can obtain the stress magnitude and direction of different layers inside the object, material structure, molecular arrangement orientation, refraction Rate, internal stress distribution, surface conductivity distribution, surface roughness and other information, more truly and accurately reflect the information of the measured sample, and can be widely used in the field of polarization measurement.
Owner:SOUTH CHINA NORMAL UNIVERSITY
Photographic device
InactiveCN107454293AIncrease authenticityImprove stitching accuracyTelevision system detailsColor television detailsCamera lensFisheye lens
The invention relates to the field of photographic equipment, and in particular to a photographic device including a sensor, a light reflective element and two fisheye lenses. The sensor is connected to an image signal processor. Each fisheye lens has a field of view greater than or equal to 220 degrees. The light reflective element is provided with two outer reflective surfaces thereon respectively matched with the fisheye lenses. An included angle between each fisheye lens and the corresponding outer reflective surface is 45 degrees. An included angle between the sensor and each outer reflective surface is 45 degrees. The axial deviation of the two fisheye lenses is less than 2 filaments. The photographic device solves the problems of poor picture realistic performance and bad picture splicing effect of a traditional panoramic photographic device, and effectively improves the picture realistic performance and the picture splicing precision.
Owner:广东九安智能科技股份有限公司
Method for fabrication of electrode structure, electrode structure and bulk acoustic wave resonator
The present application relates to the field of resonator technology, and discloses a method for making an electrode structure, including: depositing a dielectric layer on a predetermined electrode layer; the dielectric layer is used to protect the electrode layer; forming a sacrificial layer on the side away from the electrode layer, the sacrificial layer exposing the dielectric layer; depositing a metal layer on the sacrificial layer and the exposed dielectric layer; etching the the metal layer and corrodes the sacrificial layer, so that an air gap structure is formed between the metal layer and the dielectric layer. In this way, when the fabricated electrode structure is applied to the bulk acoustic wave resonator, it can accurately reflect the transverse acoustic wave with the same frequency as the resonator while ensuring the Q value of the resonator. The application also discloses an electrode structure and a bulk acoustic wave resonator.
Owner:深圳新声半导体有限公司
Heliostat driving device
InactiveCN113311876AReduce frictional resistanceReliable rollControl using feedbackHeliostatEngineering
The invention discloses a heliostat driving device which comprises a horizontal rotation driving device and a pitching driving device, wherein the horizontal rotation driving device comprises a pedestal and a base rotatably arranged on the pedestal, an eccentric shaft is arranged on the pedestal, three driving oil cylinders are evenly arranged in the circumferential direction of the pedestal, cylinder bodies of the driving oil cylinders are hinged to the pedestal through hinge seats, the ends of piston rods of the driving oil cylinders are hinged to the eccentric shaft, the hinged seats connected with the first driving oil cylinder and the third driving oil cylinder are located in the same radial direction of the base, the distance between the second driving oil cylinder and the first driving oil cylinder and the distance between the second driving oil cylinder and the third driving oil cylinder are equal, the eccentric distance of the eccentric shaft relative to the rotating center of the base is r, the rotating radius of the hinged seats on the base is R, and r / R is greater than or equal to 0.5 and less than or equal to 0.8. The structure of the heliostat driving device can be simplified so as to ensure that the heliostat can track the movement of the sun and accurately reflect sunlight to a heat absorber, and meanwhile, the photoelectric conversion efficiency is facilitated to be improved.
Owner:HANGZHOU SINO DEUT POWER TRANSMISSION EQUIP
Semiconducting laser device
InactiveCN100524983CEasy to processEasy to adjustLaser optical resonator constructionOptical resonator shape and constructionSemiconductor packageExit surface
A semiconductor laser device, comprising a semiconductor laser element (1) having at least one light-emitting surface (5), from which a laser ray can be emitted, and the laser ray has a ratio in a first direction (Y) perpendicular to it Greater divergence in the second direction; an external resonator with at least one reflective device (3, 9) having a reflective surface (4, 10) capable of diverting at least a portion of the semiconductor laser element ( 1) The laser rays emitted by the light-emitting surface (5) are reflected back in the semiconductor laser (1), so that the wave mode spectrum of the semiconductor laser (1) is affected thereby, and a reflector (3, 9) and semiconductor Lens means (2) in the external resonator between the laser elements (1), which at least partially reduce the divergence of the laser beam in at least a first direction (Y), wherein said reflecting means (3, 9) The reflecting surface (4, 10) is concavely curved.
Owner:LIMO PATENTVERWALTUNG GMBH & CO KG
A detection device and detection method for moisture content in lubricating oil
InactiveCN103837497BHigh sensitivityAvoid the disadvantages of unobvious detection signalMaterial analysis by optical meansEngineeringMoisture
Owner:DALIAN MARITIME UNIVERSITY
A communication optimization method and device for an IRS auxiliary communication system
ActiveCN110839204BHigh precisionImprove communication performanceTransmission monitoringLocation information based serviceCommunications systemEngineering
The invention discloses a communication optimization method and device for an IRS auxiliary communication system. The communication optimization method comprises the steps of determining an initial position of UE taking the initial position of the UE as a sphere center, and taking a reference position in the space sphere; determining a preliminary channel and a reference channel between the UE andthe IRS according to the preliminary position of the UE and the distance between the reference position and the IRS position; determining a channel between the AP and the IRS according to the distance information between the position of the AP and the position of the IRS; determining a preliminary matrix and a reference matrix of the IRS according to the preliminary channel and the reference channel between the UE and the IRS and the channel between the AP and the IRS; realizing communication between the AP and the UE based on the preliminary matrix and the reference matrix of the IRS, determining channels corresponding to different reflection coefficient matrixes of the IRS, and selecting the matrix with the maximum channel strength as an optimal matrix; and realizing effective communication between the AP and the UE based on the optimal reflection coefficient matrix. According to the invention, the optimization of the IRS auxiliary communication system is realized.
Owner:武汉瑞斯通信科技有限公司
Three-dimensional laser head for CO2 nonmetal laser cutting
PendingCN112975156AAccurate reflectionExtended range of processing capabilitiesWelding/cutting auxillary devicesAuxillary welding devicesRotational axisLight beam
The invention provides a three-dimensional laser head for CO2 nonmetal laser cutting. The three-dimensional laser head is characterized by comprising a C-axis rotating assembly, a B-axis swinging assembly and a laser head body, the B-axis swinging assembly is installed on a rotating shaft of the C-axis rotating assembly, and the laser head body is installed on a swinging shaft of the B-axis swinging assembly. The C-axis rotating assembly can rotate by n*360 degrees, the B-axis swinging assembly is installed on the rotating shaft of the C-axis rotating assembly and can swing by + / -135 degrees, and it is guaranteed that laser beams in the B-axis swinging assembly can be accurately reflected all the time in the movement process and are stably output through a focusing lens of the laser head body; and the processing capacity range of a three-dimensional laser cutting machine is expanded.
Owner:NOBOT INTELLIGENT EQUIP (SHANDONG) CO LTD
Ice and snow road vehicle lane-changing risk prediction method based on driving intention recognition
ActiveCN121982935BAccurately reflects the possibility of collisionAccurate reflection
The present application relates to the technical field of vehicle driving safety, in particular to an ice and snow road vehicle lane-changing risk prediction method based on driving intention recognition, comprising: collecting ice and snow road multi-source heterogeneous driving data to identify lane-changing intention; in the execution stage, based on real-time kinematics and surrounding interaction information, a modified collision time index is calculated by introducing an ice and snow adhesion coefficient correction factor, and a distance deviation index is calculated in combination with the actual stopping sight distance; the two indexes are mapped into risk exposure and severity quantitative values, a comprehensive index is obtained through fault tree analysis, and high, medium and low risk levels are divided. The method takes multi-dimensional features in the intention stage as input, uses gradient boosting decision tree to train and construct a dynamic prediction model with a graded index as a label, realizes early classification and prediction of ice and snow road lane-changing risk, and improves risk quantification accuracy and scene adaptability.
Owner:SHANDONG UNIV
A kind of ostomy care bracket
ActiveCN110680581BHeight adjustableSolve the lack of spaceNon-surgical orthopedic devicesInstruments for stereotaxic surgeryNursing careEngineering
Owner:NANYANG CITY CENT HOSPITAL
Distributed optical fiber sensing system based on Rayleigh and Brillouin scattering fusion
PendingCN113008281AImprove output power densityFlexible control of output power densityConverting sensor output opticallyRayleigh scatteringRayleigh Light Scattering
The invention relates to the technical field of distributed optical fiber sensing, in particular to a distributed optical fiber sensing system based on Rayleigh and Brillouin scattering fusion. The system comprises a light source, a modulation unit, an coherent detection unit, a Rayleigh demodulation unit and a Brillouin demodulation unit, wherein the light source is used for generating and outputting a detection light signal and a local oscillation light signal; the light source comprises an optical fiber light cone, and the optical fiber light cone is formed by melting and drawing a plurality of optical fibers; the modulation unit is used for receiving the detection light signal and modulating to generate pulsed light; the coherent detection unit is used for mixing the local oscillation optical signal and the back reflection signal to obtain an optical heterodyne electric signal; the Rayleigh demodulation unit is used for demodulating according to the Rayleigh scattering signal to obtain reflection, attenuation and vibration information along the optical fiber; and the Brillouin demodulation unit is used for demodulating according to the Brillouin scattering signal to obtain stress and temperature information of the optical fiber to be measured. The optical fiber light cone is designed in the light source, and the output power density of the light source can be effectively improved.
Owner:CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD +1
Rapid installation and combination device for civil engineering measurement control points
ActiveCN222635498UAccurate reflectionMeet the requirements of measurement accuracyMeasuring points markingStands/trestlesConstruction engineeringStructural engineering
The utility model discloses a rapid installation and combination device for civil engineering measurement control points, and relates to the technical field of control point supports, the rapid installation and combination device comprises a first support and a standard prism, the first support is provided with a servo motor, the servo motor is connected with a servo electric cylinder through a rotating assembly, and the output end of the servo electric cylinder is connected with a second support; a mounting plate is rotationally connected to the second support through two side plates, a connecting piece is arranged on the mounting plate, a clamping plate is connected to the mounting plate through a plurality of clamping springs, a connecting block is arranged on one side of the standard prism, clamping blocks are arranged on the two sides of the connecting block, and the clamping plate is in contact connection with the connecting block; according to the utility model, the clamping spring pushes the clamping plate to clamp and fix the connecting block in the connecting piece, so that the standard prism is quickly mounted, and when the standard prism is damaged or polluted, an operator can quickly finish the disassembly and assembly work, thereby shortening the downtime of equipment and improving the measurement work efficiency.
Owner:GUIYANG VOCATIONAL & TECHNICAL COLLEGE
Ice and snow covered pavement vehicle lane changing risk prediction method based on driving intention recognition
ActiveCN121982935AAccurately reflects the possibility of collisionAccurate reflectionDetection of traffic movementAnti-collision systemsRisk quantificationAlgorithm
The invention relates to the technical field of vehicle driving safety, in particular to an ice and snow covered pavement vehicle lane changing risk prediction method based on driving intention recognition, which comprises the following steps: collecting ice and snow covered pavement multi-source heterogeneous driving data to recognize a lane changing intention; in the execution stage, based on real-time kinematics and surrounding interaction information, a correction collision time index of an ice and snow adhesion coefficient correction factor is calculated and introduced, and a distance deviation index of an actual parking sight distance is combined; the two indexes are mapped into risk exposure and severity quantized values, and a comprehensive index is obtained through fault tree analysis and divided into high, medium and low risk levels. According to the method, intention stage multi-dimensional features serve as input, graded indexes serve as labels, a dynamic prediction model is trained and constructed through a gradient boosting decision tree, early graded prediction of the ice and snow pavement lane changing risk is achieved, and risk quantification accuracy and scene adaptability are improved.
Owner:SHANDONG UNIV
International trade negotiation simulation device
InactiveCN114783230AImprove efficiencyEase of evaluationTelevision system detailsCosmonautic condition simulationsSimulationFacial expression
The invention relates to the technical field of negotiation simulation devices, in particular to an international trade negotiation simulation device which comprises a negotiation table and a plurality of chairs used in cooperation, supporting legs are fixedly connected to the bottom face of the negotiation table, and a partition plate is fixedly connected to the top face of the negotiation table. A plurality of first rectangular through holes and a plurality of second rectangular through holes are formed in the outer side of the partition plate at equal intervals, the second rectangular through holes are located between every two adjacent first rectangular through holes in the corresponding positions, and image acquisition modules, electric push rods and cameras are arranged in the first rectangular through holes. According to the invention, the facial expressions of the two negotiators can be recorded through one camera at the same time, one-by-one image acquisition of the negotiators by using a plurality of cameras is omitted, the cost is saved, the improvement of the efficiency of shooting and recording is facilitated, and the voice recording module records the speaking content of the negotiators and is matched with the recording of the expressions by the cameras, so that the voice recording efficiency is improved. And the teacher can objectively evaluate the simulation negotiation result of the student.
Owner:CANGZHOU NORMAL UNIV
Device for cooling machine room and method for adjusting cooling air supply
ActiveCN103292426BAccurate reflectionEasy to adjustSpace heating and ventilation safety systemsLighting and heating apparatusAir volumeTemperature difference
The invention provides a machine room cooling device which comprises a fan, a temperature sensor arranged on a cabinet, and a controller connected with the temperature sensor and used for controlling the rotational speed of the fan, wherein the temperature sensor comprises a first temperature sensor and a second temperature sensor arranged at the air inlet and the air outlet of the cabinet; the controller is used for decreasing the rotational speed of the fan when the detected temperature difference value of the second temperature sensor and the first temperature sensor is smaller than the minimum value of a set interval; or the controller is used for increasing the rotational speed of the fan when the detected temperature difference value of the second temperature sensor and the first temperature sensor is larger than the maximum value of the set interval. The machine room cooling device achieves more precious adjustment of the cooling air supply amount, and achieves more efficient utilization of the cold airflow. The invention further provides a cooling air supply adjusting method.
Owner:HUAWEI DIGITAL POWER TECH CO LTD