74 results about "Cloud height" patented technology

A method for achieving optimum coaxial lidar configuration using optical fibers. Optical fibers are used with mirrors or lenses to create light paths that can achieve an optimum lidar configuration while employing fewer components than that of prior art for a more simplified, lightweight, and less expensive system to produce. The lidar components, including the laser source and the light detector unit, may be placed in a separate housing. A separate housing eliminates unnecessary weight in the optical telescope assembly, makes scanning of the system easier, and enables a better omni-directional cloud height indicator.

The invention relates to a method for detecting cloud height by utilizing cloud shadow information in satellite remote sensing data, which pertains to the field of atmospheric exploration and comprises the following five steps: interpolation calculation, cloud and cloud shadow detection, the matching of the cloud with the cloud shadow by MODIS data, establishment of a cloud height model for obtaining the height of cloud layer, and cloud height calculation and analysis. The method for detecting the cloud height detects the information on the cloud and the cloud shadow in the remote sensing image data, matches the cloud with the cloud shadow by combining with digital image technology and obtains the distance between the cloud and the cloud shadow; and finally the cloud height model is established to obtain the height of the cloud layer. The method for detecting the cloud height can simultaneously calculate the heights of multiple points of a piece of cloud and the height values obtained in the way can greatly improve detection accuracy of cloud heights. The cloud height can be measured in any place where the measurement conditions are met and no measurement device is needed to be set locally.

A system operable to generate a surround view based on image data, where the image data may include image data associated with surroundings of an object, such as a vehicle. The system may also be operable to project the surround view inversely onto a bowl-shaped projection surrounding the object. Further, the system may be operable to generate a virtual user view via a virtual camera position, where the virtual camera position is on a first horizontal ellipse that is about the bowl-shaped projection at a first height. Also, the system is operable to determine a viewing direction from the virtual camera position that points at a location on a second horizontal ellipse that is about the bowl-shaped projection at a second height. The second height may be lower than the first height and the second horizontal ellipse may be smaller than the first horizontal ellipse.

The invention discloses a ground terahertz radar system for detecting a cloud. The system comprises a terahertz transmitting module, a terahertz receiving module, a terahertz transmitting-and-receiving antenna module, a terahertz signal processing module and an upper computer module; the center frequency of a terahertz signal transmitted by the terahertz transmitting module is 220 GHz, the work bandwidth is 5 GHz, the transmitting power is 200 mW, the pulse width is adjustable ranging from 100ns to 3mus and the adjusted step length is 100ns, and the pulse repletion frequency is adjustable ranging from 1KHz to 10KHz and the adjusted step length is 1KHz. Compared with a laser radar and a millimeter wave radar, the ground terahertz radar system for detecting the cloud utilizes a set of parameters applicable to the cloud detection and is capable of penetrating into a thin cloud and an extremely thin cloud to carry out the three-dimensional structure detection for the cloud, and therefore not only a macrostructure such as the cloud thickness, the cloud height, the number of cloud layers, the vertical section variance of the cloud can be obtained, but also a microstructure such as the size, the shape, and the ice water content of a cloud particle can be obtained.

Disclosed is a system and method for static and dynamic positioning or motion control of a marine structure by using real-time monitoring of at least one of a mooring line, marine environments, 6-dof movement of a marine structure, a tank state, a ship topside, the seabed, or their combinations. The static and dynamic real-time monitoring data of the mooring line is obtained and processed for positioning the marine structure or controlling and managing a motion thereof. Here, 1) a tension of a mooring line is measured by means of real-time monitoring of the mooring line, 2) various marine environment elements such as wind direction, wind speed, air humidity, atmospheric pressure, atmosphere temperature, cloud height, visibility, ocean wave, wave height, sea current speed, sea current direction, rain or the like are measured by means of real-time monitoring of the marine environments, 3) 6-dof movement of the marine structure is measured by means of real-time monitoring of the marine structure, 4) ullage and sloshing data of various tanks in the marine structure are measured by means of real-time monitoring of tank states, 5) damage and life of pipes, facilities or the like located at a ship topside of the marine structure are measured by means of real-time monitoring of the ship topside, 6) damage and life of umbilical cables, pipes, pumps and valves located on the seabed are measured by means of real-time monitoring of the seabed, and suitable static and dynamic positioning or motion control and management may be automatically performed based thereon.

The invention discloses an on-line canopy height detection method for automatic control of the header height of a harvesting machine. The method comprises the steps that the point cloud data of crops in front of the harvester are acquired, and the point cloud data are converted from polar coordinates into a world coordinate system; a region of interest is established, and the point cloud data outside the region of interest are eliminated; noise points in the point cloud data are removed; the Delaunay irregular triangulation method is used to establish a digital surface model based on a small number of first control points; based on a small number of second control points, the Delaunay irregular triangulation method is used to establish a digital ground model; the digital ground model is subtracted from the digital surface model to acquire a canopy height model, and then acquire the canopy height. According to the invention, the canopy height in front of the harvesting machine and the ground height can be detected, and a data basis is provided for the intelligent control of the header height of the harvesting machine.

A jet airplane features that its main body is a flat rectangle and its longitudinal cross-section and two sides are all the cross-section of standard wing. Its advantages are high elevating force generated by its main body, short length and span, lower height, light dead weight and low cost. It has also the engine able to jet in different directions and the emergency lifesaving system.

The invention discloses a cloud top height retrieval method based on satellite tri-linear array CCD (charge coupled device) image. The method comprises the following steps: firstly selecting a cloud region in a foresight image, carrying out image matching to obtain a corresponding matching point in a back-sight image; secondly, obtaining the continuous static satellite image of adjacent time sections of the foresight image, and retrieving the wind speed and direction in the corresponding region; then, obtaining the time interval of cloud points in the foresight image and the back-sight image, and computing the displacement of the cloud points; and finally inferring the forward interaction formula of a moving target and combining the relative information of cloud point displacement and matching pair to obtain the cloud top height information. In the process of detecting the cloud top height by using the tri-linear array detector, the defects that height detection of the cloud tope height is greatly influenced caused by the moving of the cloud are compensated.

The invention provides a buoy-based long-time on-line monitoring apparatus for the sea cloud height. The apparatus comprises a buoy; and a laser ceilometer, a buoy attitude measuring module, a cloud height correction and compensation module, a communication module, and a meteorology and hydrology observation sub system. The buoy attitude measuring module is used for measuring attitude parameters, like a heading parameter, a rolling parameter and a pitching parameter, of a buoy platform; the cloud height correction and compensation module is used for realizing cloud height observation correction and compensation based on the attitude parameters of the ceilometer; and the communication module is used for uploading the data that can be used by users. According to the invention, buoy-based laser radar cloud height observation is carried out and the measurement result is accurate and reliable; off-shore, long-term continuous, real-time, high-precision, high-temporal-spatial-resolution marine environment monitoring on the cloud height, cloud thickness, and conventional marine meteorology and hydrology can be realized; an accurate and reliable data support can be provided for scientific researches of marine atmosphere, weather forecasting, ocean shipping, and naval drills and the like; and thus the apparatus has important significance in development of multiple fields like the marine economy, the marine science and technology, and the legal rights safeguarding on the sea.

The invention relates to a real-time acquiring method for sea fog thickness and cloud base height of low clouds. The method fully utilizes data from L wave band secondary wind-detecting radar and digital dropsonde data of an observatory, orderly analyzes distribution characteristics of the temperature and moisture of sea fog and the low clouds in the vertical direction, calculates stability degree conditions and turbulent flow conditions of lower atmosphere when the sea fog and the low clouds exist, makes statistical analysis and concludes the conditions to separate the sea fog and the low clouds, calculates the sea fog thickness and the low clouds height, and acquires the sea fog thickness and the low clouds height. The formed computer software automatically displays the result. The invention provides an effective method for monitoring in real time, namely simultaneously establishing an objective and feasible method for automatically extracting the cloud base height of the low clouds and monitoring the sea fog thickness in real time, has strong implementation, high reliability, and provides effective meteorological data for flight safety above the sea surface, maritime traffic transportation, as well as operations on harbors and costal airports.

A cloud height automatic observation process and a device. The device includes an image collector, in which two image collectors form a collecting unit; a sampling controller emitting the cloud image sampling command to two image collectors; an image transmission device respectively connected with two image collector for transmitting cloud picture collected by the image collector to an image processing and sampling control device and transmitting the command from image processing and sampling control device to the cloud picture collecting unit; an image processor connected with the image transmitting device for processing image and automatically measuring the height and the horizontal position of the cloud. The device has simple structure, lower cost and finishes the cloud height measuring automatically and is applied in the fields such as aviation, aerospace and weather.

The invention provides a novel laser radar system based on the coaxial optics and single photon detection technology, and a detection method. By transmitting pulse laser of certain frequency into theatmosphere through a coaxial laser device, the atmosphere generates a scattering effect on the laser, after the backward scattered laser is received by a coaxial receiving mirror, the light is focusedand then is projected onto a detector; the detector can realize automatic gain adjustment, and once an optical signal is input, a pulse signal is output; the pulse signal enters a TCSPC data collection device through a radio frequency cable, the device can achieve a resolution of 32ps, so the input time of the signal can be accurately distinguished; and after the signal is collected, a latter algorithm processes the data in real time, analyzes the current atmospheric state, the distance of pollutants and the forms of the pollutants or the like. The radar is suitable for cloud height testing,fog monitoring, pollutant emission monitoring, laser ranging, atmospheric aerosol monitoring, ozone layer testing, temperature and humidity monitoring, and the like.

The present invention discloses a method and device for prediction of radiation received by a photovoltaic power station. The method for prediction of radiation received by the photovoltaic power station comprises: obtaining the water content of an echo monomer; calculating cloud height and cloud thickness data with respect to a cloud cluster monomer in a scanning area according to the spatial distribution of the water content of the echo monomer; calculating the motion vector of the cloud cluster monomer according to the monomer echo intensity data scanned by a radar; determining whether the cloud cluster monomer may shield the photovoltaic power station in a preset time according to the motion vector of the cloud cluster monomer; and predicting the radiation received by the photovoltaic power station under the shield of the cloud cluster monomer according to actual measurement monitoring data, weather type theory radiation data, the water content of the echo monomer and the cloud height and cloud thickness data of the photovoltaic power station when determining the cloud cluster monomer may shield the photovoltaic power station. According to the invention, the radiation attenuation relation caused by shield of different clouds may be accurately calculated, and the prediction accuracy of the photovoltaic power may be improved.

The invention relates to a cloud base height inversion method based on a foundation cloud picture. The cloud base height inversion method comprises the following steps: (1) selecting places, deployingtwo whole-sky imaging instruments, setting a field angle of the two whole-sky imaging instruments to be not greater than 130 degrees, enabling the two whole-sky imaging instruments to perform synchronous observation, and enabling the observed foundation cloud picture to have an overlapped area; (2) acquiring the foundation cloud picture synchronously observed by the two all-sky imaging instruments, performing the image matching for the two foundation cloud pictures, and selecting the overlapped area with the smallest difference; and (3) for a cloud cluster selected in the overlapped area in amatching manner, and a cloud base height is inversed by utilizing a geometric relation to obtain an inversion result. Compared with the satellite cloud picture observed from the cloud top in the existing inversion method, the foundation cloud picture is observed on the ground by the whole-sky imaging instruments, i.e., the foundation cloud picture is observed from the cloud base, so that the accuracy of the cloud base height inversion result is improved, and the effect is more significant for the thick cloud and the low cloud. In addition, the application range of the whole-sky imaging instrument is also expanded.

The invention discloses a cloud base height estimation method for a single-layer cloud facing flight vehicle navigation guidance. The method comprises that the cloud layer is divided into cloud of different attributes according to data of different wavebands in an Aqua satellite; the number of cloud layers in Cloudsat and the cloud top temperature and optical thickness in Aqua are obtained from asatellite database; the Cloudsat satellite data matches Aqua satellite data in the same latitude and longitude; matched data is divided into a group of training data and a group of test data; a trained model is used to determine whether cloud of different attributes belong to the single-layer cloud; the cloud layer thickness of the single-layer low cloud is calculated by using a physical mathematical model, and a calculation result and data in the Cloudsat serve as parameters in a contrast adjustment model; a model in which a parameter is modified is used to calculate the cloud base height again; and the cloud base height can be obtained by subtracting the cloud layer height from the cloud top height. The cloud base height of the single layer cloud can be calculated, an algorithm is less complex, and the calculation range of the cloud base height is widened.

The invention discloses a measurement method and a monitoring system of atmosphere vertical visibility. In the measurement method, by means of a new relationship of extinction coefficient to visibility, which is established through a laser cloud height instrument and a visibility instrument, an influence on the vertical visibility due to difference of the relationship of the extinction coefficient to the visibility since the micro-physical characters of atmospheric aerosol particles are different can be overcome, so that the atmosphere vertical visibility can be measured more definitely and can be applied in various environments. The monitoring system can achieve monitoring of the atmosphere vertical visibility in real time in all weather in an unmanned unattended operation manner.

An atmospheric cloud height, humidity profile, or temperature measuring method and arrangement are provided. In the method, pulsed laser signals (14) are transmitted through transmission optics (2, 3, 4, 5, 6) to the atmosphere and the signal (15) reflected or scattered back from there is detected. An interference filter (3) is used in the optics, in order to stabilize the transmitted optical power to the centre wavelength of the interference filter (3).

The invention discloses a device and a method for measuring a to-ground height of an unmanned aerial vehicle in the field of electronic information, and belongs to the technical field of electronic information. The device comprises a central processing unit, wherein the central processing unit is electrically connected with a distance collecting system and an unmanned aerial vehicle state collecting system in an input manner respectively; the central processing unit is electrically connected with a wireless transmission system, a control system and a display system in an output manner respectively. According to the device and the method, a locating image frame is collected through an optical-flow camera in the distance collecting system; an ultrasonic generator measures the to-ground distance; a distance value and the pixel of the image frame are comprehensively compared and analyzed; the locating coordinate of an aircraft is obtained; the accurate measurement of the to-ground height is obtained; the electric quantity, the failure and the signal intensity of the unmanned aerial vehicle are detected through the unmanned aerial vehicle state collecting system; a control background masters the flight state of the unmanned aerial vehicle in real time; the control information of a controller is transmitted to the unmanned aerial vehicle through the wireless transmission system so as to control the unmanned aerial vehicle.

An image processing device which is capable of accurately detect pixels covered by cloud shadows and remove effects of the cloud shadows in an images are provided. The device includes: a cloud transmittance calculation unit that calculates transmittance of the one or more clouds in an input image, for each pixel; a cloud height estimation unit that determines estimation of a height from the ground to each cloud in the input image to detect position of corresponding one or more shadows; an attenuation factor estimation unit that calculates attenuation factors for the direct sun irradiance by applying an averaging filter to the cloud transmittance calculated; and a shadow removal unit that corrects pixels affected by the one or more shadows, based on a physical model of a cloud shadow formation by employing the attenuation factors calculated and the position, and outputs an image which includes the pixels corrected.

The invention provides a 3D printing method and equipment. The 3D printing method comprises the steps that height groups of a to-be-printed object in multiple different poses relative to a supportingplatform is obtained, wherein the different height groups comprise the heights of the to-be-printed object in at least one direction corresponding to the different poses; the smallest first height inthe height groups is obtained, and the second height and the third height which are orthogonal with the first height are obtained according to the first height, wherein the second height and the thirdheight are the smallest heights in the self directions; and the directions where the first height, the second height and the third height are located are used as three printing directions of the to-be-printed object for printing. The high printing speed can be achieved.