58 results about "Height finder" patented technology

A self-contained / interruption-free earth's surface positioning method and system, carried by a user on the earth's surface, includes an inertial measurement unit, a north finder, a velocity producer, an altitude measurement device, a GPS (Global Positioning System) receiver, a data link, a navigation processor, a wireless communication device, and a display device and map database. Output signals of the inertial measurement unit, the velocity producer, altitude measurement device, the GPS receiver, the data link, and the north finder are processed to obtain highly accurate position measurements of the user. The user's position information can be exchanged with other users through the wireless communication device, and the location and surrounding information can be displayed on the display device by accessing a map database with the user position information.

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 plane fixed-height calibration device and belongs to the technical field of machine vision. The plane fixed-height calibration device comprises height measuring instruments arranged on a camera mounting surface, height adjusters arranged below a calibration plate or a to-be-measured object; before the to-be-measured object is shot each time, the height measuring instruments measure the vertical height differences from the respective lower surfaces of the height measuring instruments to the to-be-measured object; and if the height difference is large, the height adjusters below corresponding positions are adjusted to make the height difference small through a PC; if the height difference is small, the height adjusters below corresponding positions are adjusted to make the height difference large through the PC; finally, the height difference of each position is consistent with that obtained during calibration, the surface of the to-be-measured object is made tobe the same as the plane where the calibration plate is located; then local images shot by multiple cameras in a combined mode can be accurately spliced, and measurement precision is improved; accurate measurement and adjustment of the distances from the cameras to the calibration plate or the surface of the to-be-measured object are realized, and the height adjustment method is simple and feasible.

The invention discloses a cargo dropping and receiving system. The system comprises a plane, a cargo cabin arranged on the abdomen of the plane body, a lifting device connected with the cargo cabin and cargo and ground receiving equipment; a pushing mechanism is arranged in the cargo cabin; the lifting device comprises a lifting rope, a rope roller, a rope fixer, a releasing mechanism, a decelerating mechanism, a cargo bag and a height measuring instrument, wherein one end of the lifting rope is connected with the rope roller, the rope roller is fixedly installed on the inner top of the cargo cabin, the rope fixer is arranged on the lifting rope in a sleeving mode, the rope fixer is fixed to the hatch of the cargo cabin, the lower end of the lifting rope is connected with the releasing mechanism, the releasing mechanism is connected with the cargo bag, and the cargo is arranged in the cargo bag. According to the cargo dropping and receiving system, the plane minimum-altitude direct cargo dropping technology is combined with the lifting rope dropping technology, the precision of air drop is improved, low-cost rapid transportation is achieved, and the development of air cargo equipment is promoted.

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 relates to a method for calibrating a height measurement center and a camera center. The method comprises steps of moving a laser altimeter in four directions, an X-axis positive direction, an X-axis negative direction, a Y-axis positive direction and a Y-axis negative direction, enabling the laser altimeter to sense the abrupt change of a laser reading, and obtaining the coordinatesof four abrupt change points; the midpoints of the two abrupt change points on the X axis in the X-axis direction and the midpoints of the two abrupt change points on the Y axis in the Y-axis direction representing the positions where laser height measurement is aligned with the center of the circular hole; and the specific position of the circular hole being identified through the camera so thatthe relative deviation between laser height measurement and the center of the camera is obtained, and the precision is very high. According to the method for calibrating the height measurement centerand the camera center provided by the invention, the CCD camera and the visual algorithm are used for positioning the circular hole of the standard block, and meanwhile, laser height measurement is controlled to carry out edge searching processing on the circular hole, so the relative positions of the CCD and the height measurement are confirmed.

The invention discloses a parameter determining method for a compound leveling instrument. The parameter determining method comprises the following steps: mounting a plane mirror parallel to a scale surface beside a scale of the compound leveling instrument; secondly, selecting two ground points x and z at the plain land and respectively arranging a compound leveling instrument A and a compound leveling instrument B at the x and the z; meanwhile, leveling the compound leveling instrument A and the compound leveling instrument B, enabling collimation axes of respective opposite height finders to collimate own scales through the mirrors on the opposite compound leveling instruments, and observing and reading divisional scale data of own scales; keeping the compound leveling instrument B immobile, moving and arranging the compound leveling instrument A at the ground point y, simultaneously leveling the compound leveling instrument A and the compound leveling instrument B, enabling the collimation axes of the respective opposite height finders to collimate the own scales through the mirrors on the opposite compound leveling instruments, and observing and reading the divisional scale data of own scales; finally, calculating angles i of the compound leveling instruments and the heights H of the height finders according to measured data.

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 a multi-emulsion preparation system. The multi-emulsion preparation system comprises a microfluidic chip and a liquid conveying device connected with the microfluidic chip, wherein the microfluidic chip is provided with a plurality of single-phase liquid inlets; the liquid conveying device comprises a controller and a liquid conveying unit connected with the controller; theliquid conveying unit comprises an operation platform, a buffering and liquid storage device, an overflowing device, a circulating bottle and a micro-pump; the operation platform is provided with a first transmission device and a second transmission device; the buffering and liquid storage device is connected onto the first transmission device; the overflowing device is connected onto the secondtransmission device; the operation platform is further provided with a laser height finder; the controller is connected with the laser height finder, the first transmission device and the second transmission device. According to the multi-emulsion preparation system, the inlet amount of fluid is controlled through adjusting an overflowing height and the fluid is stably introduced into the circulating and overflowing multi-emulsion preparation system; the system can be used for stably preparing multi-emulsion under an unattended condition and the stability of the emulsion prepared by differentbatches is improved.

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.

To provide an optical-scanning-height measuring device capable of efficiently measuring a shape of a desired portion of a measurement object. Designation of a measurement point on an image of a measurement object S is received. Light emitted from a light emitting section 231 is deflected by the deflecting section and irradiated on the measurement object S. The deflecting section is controlled to irradiate the light on a portion of the measurement object S corresponding to the measurement point. A deflecting direction of the deflecting section or an irradiation position of the light deflected by the deflecting section is detected. Height of the portion of the measurement object S corresponding to the measurement point is calculated on the basis of the deflecting direction of the deflecting section or the irradiation position of the light deflected by the deflecting section and the light reception signal output by the light receiving section.

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 comprehensive positioning and navigation equipment for a special vehicle with navigation aid lamps arranged quickly, and relates to the technical field of positioning and navigation. Position information and advancing direction information of the special vehicle are comprehensively positioned through signals of the differential Beidou satellite receiver, the single-point Beidou satellite receiver, the side line camera, the inertial navigation module, the angle and angular velocity sensor, the laser altimeter and the like. Reliable and high-precision positioning and navigation support can be provided for implementation of tasks such as rapid arrangement of airport navigation lights. According to the invention, Beidou satellite signals and various sensor information are comprehensively utilized, the equipment has the advantage of high positioning and navigation precision, has various working modes which can be freely switched, and still has certain applicability under the conditions that differential Beidou satellite signals are unavailable and airfield runway sideline vision is unavailable.

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.

Disclosed is a compact integrated apparatus of an interferometric radar altimeter (IRA) and a radar altimeter (RA) capable of performing individual missions by altitude, which includes: a plurality of antennas; a signal processing control unit selecting an RA mode at a low altitude and selecting an IRA mode at a high altitude based on a mode threshold and selecting an FMCW waveform at the low altitude and selecting an FM pulse waveform at the high altitude based on a waveform threshold; and a transceiving unit transmitting a signal by a first antenna positioned at an outermost portion among the plurality of antennas and receiving a signal by an nth antenna positioned at another outermost portion among the plurality of antennas in the RA mode and transmitting a signal through the first antenna and receiving signals through the plurality of antennas in the IRA mode.

The invention discloses an on-orbit joint calibration method for a multi-beam satellite-borne laser altimeter. According to the method, a relative geometrical relationship between a reference beam andother beams is constructed by setting a reference beam, so that a multi-beam laser combined geometric calibration model is established. The method comprises the steps of setting a reference beam of the multi-beam satellite-borne laser altimeter, and constructing an on-orbit combined geometrical calibration model of the multi-beam satellite-borne laser altimeter; combining the geometric calibration models of the multi-beam satellite-borne laser altimeter, and resolving a geometric calibration error equation of the multi-beam satellite-borne laser altimeter; and performing laser pointing and ranging settlement on each beam of the multi-beam satellite-borne laser altimeter. The technical scheme of the invention aims to solve the problem of on-orbit calibration of the multi-beam satellite-borne laser altimeter, and provides a reliable on-orbit calibration method for the multi-beam satellite-borne laser altimeter which is already on orbit and is about to be launched at present.

The invention discloses a waveform matching-based on-orbit pointing calibration method of spaceborne laser. The method includes the following steps: carrying out echo waveform simulation of a spaceborne laser altimeter on the basis of airborne lidar (Light Detection And Ranging) data; matching a real waveform according to an obtained simulation waveform, and determining foot point centroid coordinates of the spaceborne laser according to a method of matching the real waveform by the simulation waveform; and calibrating a pointing angle of the spaceborne laser according to a geometric calibration model of the spaceborne laser altimeter and the foot point centroid coordinates of the laser. According to the calibration method, the simulation waveform is adopted to match the real waveform, thus a foot point centroid position of the laser is quickly determined, and the purpose of on-orbit pointing calibration of the spaceborne laser altimeter is achieved. By using the calibration method, ground detectors are no longer relied on, only the existing airborne lidar data need to be used, and field operation cost can be greatly reduced.