58 results about "Height finder" patented technology

A method of elevation control points extraction assisted by satellite laser altimeter data, which is characterized in that take the waveforms received by satellite and the waveforms simulated from digital surface model (DSM) of image scene reconstruction as input data, and includes two times of waveform matching and combined process of multi-source remote sensing data. The elevation control points could be extracted without the influence of terrain fluctuation or urban buildings for the terrain information of laser spot area has been taken into account. The first time is realized by matching two groups of waveforms from the received and the simulated, and the spatial registrations between locations of laser spots and DSM are realized. The second time is realized by matching two single waveforms from the received and the simulated, and local system errors in DSM of laser spot area could be extracted. With the registration results and local system errors, many applications including extraction of elevation control points could be easily developed. The invention mainly includes the following steps: (1) Preliminary refinement of orientation parameters of high-resolution stereo or InSAR images by free net adjustment; (2) DSM reconstruction with high-resolution stereo images or InSAR data; (3) dividing the received laser altimetry data into groups; (4) Waveform extraction of the receiving group; (5) observation design for simulation waveform group; (6) simulation waveform acquisition through observation of DSM; (7) matching the received group waveforms with the simulated group waveforms; (8) plane position registration between laser spot and DSM; (9) matching each pair of waveforms in group between the received and the simulated respectively; (10) extraction of DSM elevation system errors on each laser spot area; (11) extraction of image elevation control points; (12) refinement of DSM elevation, calibration of satellite laser altimeter sensor, combined processing with laser altimetry and image remote sensing. The invention mainly solves two difficulties. One difficulty is finding footprints, or say laser spot areas, of satellite laser altimeters on stereoscopic images, InSAR images and the DSM they generate. Another difficulty is the accurate elevation extraction of laser spot areas with uneven terrain. The invention can realize the spatial registration between laser spot and DSM or remote sensing in different terrain and establish spatial connection between laser altimetry data and stereo images or InSAR data. In different terrain conditions, by the invention, the satellite laser altimetry data can be used for high-precision elevation control of 3D reconstruction/positioning of stereo images or InSAR data.

The invention discloses a device for measuring a height of a tree. The device is simple in construction, and overcomes the defects that in the conventional height finder, when the height of the tree is measured, a horizontal distance between a measurement point and the tree is needed to be measured firstly, or a surveying pole for measurement is needed to be arranged in front of the tree and the like. The device mainly comprises a sighting bar and a measuring scale provided with three fixing or movable adjusting needles respectively and arranged on a support frame, wherein one adjusting needle on one side of the sighting bar and one adjusting needle on one side of the measuring scale are shared; the sighting bar and the measuring scale are connected via the shared adjusting needle; the height of the tree is measured by sighting the tip of the tree or the base of the tree three times through the five adjusting needles on the sighting bar and the measuring scale during measurement, and no any other auxiliary tool is needed. The measuring method is simple and the measurement precision is high; the height of the tree can be read directly; and the device is a simple, practical, novel and efficient height measuring device applicable to forest environment, does not need to measure the horizontal distance, and does not need to place the surveying pole for measurement in front of the tree; when the device is used, the measurement point can be selected optionally, so the purpose of quickly and efficiently measuring the height of the tree is achieved.

The invention discloses a full-link photon counting laser altimeter point cloud generation method. A full-link simulation model including ground light spot coordinate calculation, atmospheric refraction offset correction, target geometry and radiation characteristics, detector response and the like in the height measurement process of a satellite-borne laser altimeter is established, and high-precision single-photon point cloud is generated through simulation in combination with satellite platform parameters, laser altimeter system parameters, environmental parameters, target characteristic parameters and the like. The laser altimeter point cloud generation method can accurately adjust various system parameters and environmental parameters, and has the advantages of being rapid, easy to simulate various conditions and good in expansibility. ICESat-2 system parameters can be used as input to simulate and detect randomly generated terrain surfaces, and high-quality photon point clouds are generated.

The invention discloses an automatic correction device and method for a focusing part of a camera. The device comprises a rotating platform, at least two camera module jigs are arranged on the rotating platform, a mounting table is arranged on one side of the rotating platform, a y-axis moving mechanism is arranged at the bottom of the mounting table, an x-axis moving mechanism is arranged on the mounting table, the x-axis moving mechanism comprises an x-axis mounting plate capable of moving along an x axis, an industrial camera and a height gauge are arranged on the x-axis mounting plate, the camera module jigs rotate to a position below the industrial camera during moving, a focusing head assembly is connected with a focusing u-axis mechanism and comprises a focusing head, the focusing head is arranged in parallel to the height gauge and the industrial camera, and the industrial camera, the height gauge and the focusing head are all electrically connected with a control host. The device and the method replace manpower to realize automatic correction of equipment, improve the productivity, reduce the difference among products, and thus improve the quality of the products.

The invention discloses a ruler-instrument integrated rapid leveling device. According to the ruler-instrument integrated rapid leveling device, the working efficiency and the reliability of leveling can be effectively improved. The ruler-instrument integrated rapid leveling device comprises a leveling staff, a level indicator, a height finder, an observing record book, a auxiliary bracket and an auxiliary ruler pad, wherein the graduations are formed in the surface of the leveling staff, and the height finder is connected with the leveling staff through a first connecting component; the observing record book is fixedly connected with the leveling staff through a second connecting component, and a signal output end of the height finder is connected with a data processing module of the observing record book; the auxiliary bracket is fixedly connected with the leveling staff through a third connecting component, and the leveling staff can horizontally rotate relative to the auxiliary bracket; and the auxiliary ruler pad is fixedly connected with the leveling staff through a fourth connecting component, and the leveling staff can rotate relative to the auxiliary ruler pad.

The invention provides a small mobile eddy correlation turbulence water and heat fluxes observation system and method. The small mobile eddy correlation turbulence water and heat fluxes observation system is carriedabove a fixed-wing drone andcomprises an onboard 5-hole turbulence probing head, a thermocouple probing pin, a quick response hygrometer, a temperature and humidity sensor, a net radiometer, a photosynthetically active radiometer, an infrared thermometer, a laser altimeter, a GPS-assisted inertial navigation system, a wireless communication module, an input device, an analog/digitalsignal converter, and a data acquisition control computer. The small mobile eddy correlation turbulence water and heat fluxes observation system and method have the advantages that the small mobile eddy correlation turbulence water and heat fluxes observation system is carriedonthe fixed-wing drone and used for direct observation of earth surface turbulence water and heat fluxes at a regional scale, and the advantages of having low observation cost and good portability and flexibility are obtained. The range of the earth surface representable by flux calculation result ofeach turbulence fluxobservation windowscancommonly cover several square kilometers, and the research and application of moderate and coarse resolution remote sensing images and land surface process model grid scale can be sufficiently satisfied.

The invention discloses a cesium light pump magnetic measuring method based on a fixed-wing unmanned aerial vehicle. The method includes: presetting a testing qualification standard, conducting performance testing on the unmanned aerial vehicle, and if testing is qualified, establishing signal connection between a ground measurement and control station and the unmanned aerial vehicle; if the testing is unqualified, conducting the performance testing of the unmanned aerial vehicle again; after the unmanned aerial vehicle reaches measurement height, calculating magnetic compensation coefficient;after magnetic compensation is completed, respectively transmitting magnetic measuring data measured by a cesium light pump magnetometer and navigation data measured by a laser altimeter, a GPS and an IMU to a data collection box through a serial port; after the data collection box receives corresponding magnetic measuring data and navigation data, transmitting the same to a field data preprocessing system for data processing; performing aeromagnetic interpretation on processed data. By the method, measuring accuracy, working efficiency and flying safety are improved, and weight, size and cost of the unmanned aerial vehicle are reduced.

The invention discloses a field-free geometric calibration method and system for a satellite-borne laser altimeter. The method comprises the following steps of: (1) solving an initial positioning result of the laser altimeter based on a strict geometric positioning model, (2) compensating the propagation atmospheric delay time of the satellite-borne laser to a positioning result of the laser altimeter by using an atmospheric delay correction model, and (3) selecting a laser sequence point according to the height measurement positioning data, matching the elevation information of the laser footprint point in the laser sequence point with the known terrain, and calibrating the laser emitting direction based on the matching result. The invention provides a brand-new laser on-orbit geometric calibration method, and thus, the problem of inaccurate initial pointing of the satellite-borne laser altimeter is solved, the blank in the aspect in China is filled up, and a basis is provided for high-precision geometric processing of satellite-borne laser radar height measurement data.

The invention discloses a cargo air-dropping and receiving system, which includes an aircraft and a cargo compartment arranged on the belly of the fuselage, a lifting device connecting the cargo compartment and the cargo, and ground receiving equipment. The cargo compartment is provided with a pushing mechanism, The lifting device includes a sling, a rope reel, a rope fixer, a release mechanism, a deceleration mechanism, a cargo bag and an altimeter, and one end of the sling is connected to the rope reel, and the rope reel is fixedly installed On the inner top of the cargo compartment, the rope fixing device is sleeved on the sling, the rope fixing device is fixed at the hatch of the cargo cabin, the lower end of the sling is connected to a release mechanism, and the release mechanism is connected to the cargo bag bag, and the cargo bag is provided with goods. The invention combines the technology of direct delivery of goods by aircraft at ultra-low altitude and the technology of delivery by sling, improves the accuracy of airdrop, realizes low-cost and fast transportation, and promotes the development of air cargo equipment.

The invention relates to a low-stress conductive sealing adjustment device and method for an aviation light window. By using instruments and equipment such as a height indicator, a precise electric control adjustment table and an auto-collimation light pipe, special process equipment such as a light window adjustment reference tool and a light window supporting tool and a composite bonding layer,the adjustment reference of the aviation light window can be quickly established, the adjustment precision is improved, the clamping stress and the bonding stress are reduced, the adjustment stress isavoided, the optical performance is ensured while the sealing performance and the electromagnetic shielding performance of the aviation light window are ensured, and the adjustment efficiency and theadjustment quality of the aviation light window are greatly improved.

The invention discloses an ionospheric altimeter numerical control system and method with a variable radar transceiving time sequence. The ionospheric altimeter numerical control system and method areused for setting transceiving delay according to radar detection frequency, generating a time sequence control signal, controlling an ionospheric altimeter to generate a used transmitting signal under the enabling of the time sequence signal and processing an echo signal reflected by an ionospheric layer. The system is realized through an FPGA and comprises a radar time sequence generation module, a coding sequence reading module, a signal generation module, an analog-to-digital conversion module, a digital down-conversion module, a data packaging module and a data caching module, transmitting and receiving delay is set according to transmitting frequency, and a receiving channel is closed after an ionospheric altimeter receives an echo signal; compared with the mode of taking the transceiving delay corresponding to the maximum detection height as the receiving time, the receiving time of the altimeter is effectively reduced, and the detection period of the system is shortened.

The invention discloses a fool type tree electronic height measuring instrument and a data acquisition and operation algorithm thereof. Three keys refer to a special tip angle key, a stem distance keyand a base angle key which are installed on the height measuring instrument, and the data acquisition and operation strategy is a working strategy specially designed for the three-key type tree electronic height measuring instrument. By means of the electronic height measuring instrument, the tip angle, the stem pitch and the base angle parameters are allowed to be independently and instantly re-measured and updated in the measurement process, and the successive measurement sequences of the three parameters are not limited, so that the flexibility of the measurement process increased, the overall reworking frequency is greatly reduced, and the electronic height measuring instrument has great significance in further improving the working efficiency and enhancing the reliability of the highmeasurement result. Moreover, the electronic height measuring instrument is simple to operate and can be mastered easily, and can be used as an upgrading product of a traditional tree electronic height measuring instrument for popularization.

The invention discloses an ionosphere tomography method based on multi-source data driving. The ionosphere tomography method comprises the following steps: step A, downloading and preprocessing altimeter and occultation observation data; b, the peak electron density NmF2 of the ionized layer F2 is driven and updated; c, performing driving updating on the peak height hmF2 of the ionized layer F2; step D, performing electron density driving updating on the background ionized layer model; step E, GNSS and satellite beacon observation data processing; and step F, ionosphere electron density tomography. According to the method disclosed by the invention, the background ionosphere model is effectively updated by utilizing a data driving method by utilizing the characteristic that the ionosphere altimeter and occultation vertical observation are relatively high in resolution, and on the basis, ionosphere tomography is carried out by utilizing a ground-based GNSS and a TEC observed by a satellite beacon; and the reconstruction precision of the electron density of the three-dimensional ionized layer can be effectively improved.

The invention provides a laser annealing device. The laser annealing device comprises an objective table for holding a wafer, a laser assembly for emitting a laser beam to the wafer to anneal the wafer, and the wafer is provided with a first surface deviating from the objective table and a second surface facing the objective table. The height indicator is arranged above the objective table, and the three-axis galvanometer system is arranged between the laser assembly and the wafer. The altimeter measures height difference changes between different positions on the first surface of the wafer and a reference surface set by the altimeter; the three-axis galvanometer system moves a laser beam emitted by the laser assembly to adjust the focus position of the laser beam focused on the wafer. Thethree-axis galvanometer system further comprises a control device, and the control device controls the three-axis galvanometer system to keep the focus on the layer structure, away from the first face by the set depth, of the wafer according to the height difference change measured by the altimeter. And the focus position of the laser beam is adjusted up and down according to the convex-concave fluctuation of the first surface of the wafer, so that the wafer annealing position accuracy is improved.

The invention discloses a water and soil loss monitoring method, which belongs to the field of water and soil loss monitoring. According to the technical scheme, the method is characterized by comprising the following steps of S1, regularly adopting a comprehensive investigation mode, arranging a plurality of sections by adopting a GPS lambda determining instrument in combination with tools such as a topographic map, a digital camera, a range finder, an altimeter, a marker post, a ruler and the like through field survey, selecting a plurality of soil loss monitoring points, arranging at leastthree section sampling points at the downstream of each soil loss monitoring point before raining, and arranging water collecting cylinders at the sampling points, and S2, arranging a flow monitoringmeter at the water outlet of the water collecting cylinder arranged in the step S1, and meanwhile, arranging a remote controller on the water collecting cylinder and enabling the remote controller with a control center. Thus, the method has the effects that the labor investment is reduced, and meanwhile, errors caused in the sampling process are reduced.

A height gauge convenient to adjust disclosed by the present invention comprises a plate body, the right side of the top of the plate body is fixedly connected with a shell, the top of an inner cavity of the shell is fixedly connected with a speed reducer, the top of the speed reducer is fixedly connected with a motor, and an output shaft of the speed reducer is fixedly connected with a first threaded rod. The surface of the first threaded rod is sleeved with a threaded sleeve in a threaded mode, the right side of the threaded sleeve is fixedly connected with a limiting rod, the right end of the limiting rod is movably connected with the right side of the inner cavity of the shell, the left side of the threaded sleeve is fixedly connected with a fixing rod, and the left end of the fixing rod extends to the left side of the shell and is fixedly connected with a measuring jaw. The height gauge has the advantage of being convenient to adjust, and the problems that in the using process of an existing height gauge, the levelness of the height gauge is not convenient to adjust, the measuring precision of the height gauge is prone to being affected, the measuring face of the top of a measured object is not convenient to adjust, and the measuring efficiency of a user is reduced are solved.

The invention provides a disturbance observation method based on an ionosphere altimeter, and relates to the field of ionosphere disturbance observation. The disturbance observation method based on the ionospheric altimeter comprises the following steps of initializing a port, namely monitoring the system time and judging whether the time reaches a specified duration or not; generating a data file, namely writing the control to a DDS board and an RCVR board through the port, and starting frequency sweeping; starting the system, namely starting the DDS board to generate a frequency signal, performing phase coding and double-phase modulation, operating a pulse set, starting an MCU, and transmitting a coded pulse; and regularly collecting, namely after a certain time, stopping transmitting the coded pulse, acquiring 140 or 170 groups of echo signals, judging whether the pulse set is operated or not, entering the next step when the operation is not completed, and otherwise, carrying out the system starting step again. According to the present invention, a high-precision Doppler frequency height map can be obtained in real time, and ionosphere disturbance can be observed and analyzed conveniently.