33results about How to "Accurate reflection" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The invention provides a household heliostat and a heliostat method. The household heliostat comprises a reflecting mirror, a first driving mechanism, comprising a first driving device and a pitchingrotary encoder; the first driving device comprising a speed reducing motor and a first moment limiter, and the speed reducing motor being connected with the reflecting mirror through the first momentlimiter; a second driving mechanism, comprising a second driving device and an azimuth rotary encoder; the second driving device comprising a motor, a speed reducer and a second moment limiter; the motor being connected with the reflecting mirror through the speed reducer and the second moment limiter; and a control mechanism, connected with the gear motor, the pitching rotary encoder, the motor and the azimuth rotary encoder. According to the invention, through the control mechanism, the first driving mechanism and the second driving mechanism, accurate tracking of light of the sun is realized, and sunlight is accurately reflected to a target position. The household use of the heliostat is fully considered, and the heliostat has the characteristics of simplicity in installation, convenience in use and low cost.