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38results about How to "Realize solution" patented technology

Carrier course angle calculation method based on polarization compass

The invention relates to a carrier course angle calculation method based on a polarization compass. The polarization compass comprises two acceleration meters in the horizontal direction and three polarization sensors. The carrier course angle calculation method based on the polarization compass includes that firstly, using the acceleration meters in the horizontal direction to acquire the horizontal posture (pitch angle theta and roll angle gamma) of the carrier; secondly, using the geographical location information and time information of the carrier to calculate a unit sun vector St under a geographic coordinate system; thirdly, using the polarization sensors on the carrier to measure a polarization azimuth angle to calculate a unit sun vector Sm under a polarization sensor module coordinate system; finally, using the horizontal posture information and sun vector information to build the transformation relation of the unit sun vector between the geographic coordinate system and polarization sensor module coordinate system, and confirming the course information Psi of the carrier. The carrier course angle calculation method based on the polarization compass has advantages of high precision, less calculated amount, strong compatibility and the like.
Owner:青岛智融领航科技有限公司

Distributed temperature testing system and method for hot dry rock deep well

The invention relates to a distributed temperature testing system and method for a hot dry rock deep well. The system comprises a distributed optical fiber temperature collection device, a logging winch, a well descending device and a temperature measuring optical cable, wherein the distributed optical fiber temperature collection device is used for completing collection of temperature along the temperature measuring optical cable and data processing; the logging winch is used for containing and transporting the temperature measuring optical cable and further used for providing a power source for fixed-depth and uniform-speed descending and winding of the temperature measuring optical cable; the well descending device is used for mechanical fixation and guidance for descending and winding of the temperature measuring optical cable; and the temperature measuring optical cable serves as a temperature sensing element and a data transmission channel. The system and the method achieve distributed temperature measurement of the hot dry rock deep well, and have the characteristics of resisting high temperature and high pressure, resisting electromagnetic interference, being free of limitation of severe environments like complex geometric space, and the like.
Owner:CENT FOR HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CGS

Hole panoramic image pair three-dimensional imaging method

The invention discloses a hole panoramic image pair three-dimensional imaging method, which comprises a basic principle, a method, an optimized design and algorithm realization. According to the basic principle of the three-dimensional imaging, an imaging method for a 360-DEG drilling hole wall panoramic image-paired image containing the location information of an imaging device is provided by utilizing the technological combination of an optical converter of a twin-conical-surface lens, the imaging device and the space location; a calculation formula of a panoramic image-paired image is derived by theoretically analyzing the hole panoramic image pair imaging principle, the optimized analysis is carried out for the parameters of relevant technology and the layout design, and the corresponding software algorithm is established; and by analyzing a key point and difficulties for realizing the algorithm, the corresponding implementation scheme and flow block diagram are compiled. By adopting the hole panoramic image pair three-dimensional imaging method, the difficult problem of panoramic and three-dimensional detection inside the hole can be solved, a scientific method is provided for the precise detection inside the hole, the breakthrough and substantive progress of the drilling photograph technology can be realized, and the remarkable scientific significance and economical practicability can be realized.
Owner:INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI

Magnetic encoder based on double synchronous rotation coordinate systems

The invention discloses a magnetic encoder based on double synchronous rotation coordinate systems. The magnetic encoder based on the double synchronous rotation coordinate systems comprises a magneto-electricity signal generator, a signal conditioner, a signal acquisition module and a signal processing unit, wherein the signal processing unit is composed of a forward-direction Parker converter, a reverse-direction Parker converter, a forward-direction decoupling device, a reverse-direction coupling device, low-pass filters and a motion information solver, and is used for carrying out coordinate transformation, decoupling operation, filtering processing and motion information calculation on digital electrical signals input by the signal acquisition module. The signal processing unit which uses the double synchronous coordinate transformation mode carries out coordinate transformation on positive sequence components and negative sequence components of fundamental waves in magneto-electricity signals, and resolves the positive sequence components and the negative sequence components of the fundamental waves into components in a positive sequence dq coordinate system and components in a negative sequence dq coordinate system, calculation of motion information is achieved through a decoupling network and the filtering link, signal distortion components generated due to device difference, installation errors and the like can be eliminated through the decoupling devices and the low-pass filters, and thus calculation accuracy and the anti-interference capacity of the magnetic encoder are greatly improved.
Owner:HUAZHONG UNIV OF SCI & TECH

Spacecraft attitude determination method utilizing same-beam interferometric measurement of ground measurement station

InactiveCN105371854AImprove the accuracy of attitude calculationRealize solutionInstruments for comonautical navigationEngineeringMeasurement station
The invention belongs to the field of spacecraft attitude determination and radio interferometric measurement and relates to a spacecraft attitude determination method utilizing same-beam interferometric measurement of a ground measurement station. The method includes the steps that different satellite-borne transmitting antennae of a same spacecraft carry out same-beam interferometric measurement so that the distance differences between the different satellite-borne transmitting antennae of the same spacecraft and different ground receiving antennae can be acquired; on the basis of the distance differences, the attitude information of the spacecraft is resolved. According to the method, same-beam interferometric measurement is performed on downlink signals of the spacecraft, the accurate distance differences between the satellite-borne transmitting antennae and the ground receiving antennae are acquired, and therefore the attitude information of the spacecraft is resolved. The ground receiving antennae are utilized, and compared with an existing measurement method based on a satellite-borne device, reliability is high; besides, interferometric measurement is implemented through the ground measurement station, fault maintaining performance is good, and the risk that a whole satellite loses efficiency because of attitude measurement failure of the satellite-borne device is eliminated.
Owner:BEIJING AEROSPACE CONTROL CENT

Autonomous navigation positioning method based on polarization pose information coupling iteration

ActiveCN112066979ARealize solutionRealize concurrent calculation of real-time pose and poseNavigation by astronomical meansPhysicsSatellite
The invention relates to an autonomous navigation positioning method based on polarization pose information coupling iteration, and the method comprises the steps: firstly measuring a polarization angle through a polarization sensor, calculating a system sun vector, and converting the system sun vector into a sun vector under a geographic coordinate system; then, resolving the solar altitude angleand azimuth angle at the moment from the solar vector under the geographic coordinate system; calculating the solar declination through time, and calculating the longitude and latitude of the movingbody; updating the sun vector of the navigation system by using the position and the time, updating the sun vector and the gravity vector under the machine system by using the new measurement information, solving the three-dimensional attitude of the moving body through an attitude conversion direction cosine matrix, and updating the three-dimensional attitude of the moving body through two-step loopback iteration of position updating and attitude updating. Pose concurrent calculation with polarization as a unique external information source is realized. According to the method, polarization serves as a unique external information source, simultaneous calculation of the position and the attitude is achieved, the method can be suitable for navigation of a moving body under satellite denialand magnetic interference conditions, and the needed sensor is low in cost, small in size and easy to apply and implement.
Owner:BEIHANG UNIV

A Computational Method of Carrier Heading Angle Based on Polarized Compass

The invention relates to a carrier course angle calculation method based on a polarization compass. The polarization compass comprises two acceleration meters in the horizontal direction and three polarization sensors. The carrier course angle calculation method based on the polarization compass includes that firstly, using the acceleration meters in the horizontal direction to acquire the horizontal posture (pitch angle theta and roll angle gamma) of the carrier; secondly, using the geographical location information and time information of the carrier to calculate a unit sun vector St under a geographic coordinate system; thirdly, using the polarization sensors on the carrier to measure a polarization azimuth angle to calculate a unit sun vector Sm under a polarization sensor module coordinate system; finally, using the horizontal posture information and sun vector information to build the transformation relation of the unit sun vector between the geographic coordinate system and polarization sensor module coordinate system, and confirming the course information Psi of the carrier. The carrier course angle calculation method based on the polarization compass has advantages of high precision, less calculated amount, strong compatibility and the like.
Owner:青岛智融领航科技有限公司

Aircraft system analysis system and method on basis of coupling relation

ActiveCN104318019ADescribe wellImplement coupling relationship mappingSpecial data processing applicationsDomain modelArray data structure
Disclosed is an aircraft system analysis system and method. The aircraft system analysis system comprises a model import module, a parameter mapping module, a system coupling loop identifying module, a loop operation module and a system output module. The model import module imports domain models having the coupling relation into the aircraft system to be marked with domain A and domain B, arrays A.out [am] and B.out [bm] are valuated with response parameters of the domain A and the domain B, arrays A.in [an] and B.in [bn] are valuated with self-variable parameters, and the arrays are stored as XML formatted files. The parameter mapping module maps the parameters between the domain A and the domain B to form coupling files. The system coupling loop identifying module identifies the coupling files to form a coupling loop G0. The loop operation module processes the G0 to obtain a process G1 and operates the G1 until the G0 is balanced, the values of nodes of the balanced forward arrays are stored into AtoB [m], and the values of nodes of the reverse arrays are stored into BtoA [n]. The system output module extracts the values of the AtoB [m] and the BtoA [n], and the values are stored as the XML files of the forward nodes and the reverse nodes and outputted.
Owner:CHINA ACAD OF LAUNCH VEHICLE TECH

intersatellite laser communication system

An inter-satellite laser communication system can be applied in free space laser communication. The principle of this system device is that in the transmitting optical path, the intensity-modulated laser is emitted through the common optical path of transceiver after passing through the 45° reflector; Then it is incident on the photoelectric detection unit to realize the position calculation and the extraction of the communication signal. The common light path for transmitting and receiving is composed of front optical wedge, rear optical wedge, transmitting and receiving lens and middle hole reflector. Among them, the establishment of the laser communication link is realized through the coordinated rotation of the front wedge and the rear wedge; the function of the transceiver lens is to focus the received parallel light and collimate the emitted light; the center-hole reflector mainly realizes the transceiver Separation of light paths. The present invention is characterized by adopting the coaxial design scheme of transmitting and receiving, which reduces the volume and improves the stability of the system at the same time. The isolation of the system is increased by using different ways of transmitting wavelength and receiving wavelength. And by using the way of rotating the double optical wedge, the deflection angle of the beam can reach ±30°.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI

A geolocation method for ground panorama images

A geographic positioning method for ground panoramic images of the present invention first adopts an omni-directional feature quantity for the overall description of the spatial organization orientation relationship, completes rough positioning by retrieving the description vectors at grid points on the satellite image map, and then performs coarse positioning. Positioning determines several matching lines as the control lines when the height information is distorted. Finally, under the constraint that the order of the relative height remains unchanged, the initial value of the iteration is introduced through rough positioning to realize the precise calculation of the outer azimuth elements. Different from the beam adjustment calculation of multiple frames of ground images, this method only needs medium and high-resolution satellite image data and relative elevation information of the scene surface, without any other positioning devices (such as GPS) and without adding artificial control points. Realize the precise external parameter calculation of a single frame of ground panoramic image, which is very suitable for image registration with huge differences in field of view and scale such as sky and earth.
Owner:BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH

An aircraft system analysis system and method based on coupling relationship

ActiveCN104318019BDescribe wellImplement coupling relationship mappingSpecial data processing applicationsDomain modelSystems analysis
Disclosed is an aircraft system analysis system and method. The aircraft system analysis system comprises a model import module, a parameter mapping module, a system coupling loop identifying module, a loop operation module and a system output module. The model import module imports domain models having the coupling relation into the aircraft system to be marked with domain A and domain B, arrays A.out [am] and B.out [bm] are valuated with response parameters of the domain A and the domain B, arrays A.in [an] and B.in [bn] are valuated with self-variable parameters, and the arrays are stored as XML formatted files. The parameter mapping module maps the parameters between the domain A and the domain B to form coupling files. The system coupling loop identifying module identifies the coupling files to form a coupling loop G0. The loop operation module processes the G0 to obtain a process G1 and operates the G1 until the G0 is balanced, the values of nodes of the balanced forward arrays are stored into AtoB [m], and the values of nodes of the reverse arrays are stored into BtoA [n]. The system output module extracts the values of the AtoB [m] and the BtoA [n], and the values are stored as the XML files of the forward nodes and the reverse nodes and outputted.
Owner:CHINA ACAD OF LAUNCH VEHICLE TECH

A Micromechanical Gyroscope Based on Waveguide Grating Evanescent Field Disturbance Detection

The invention discloses a waveguide grating evanescent field disturbance detection-based micromechanical gyroscope micromechanical gyroscope. According to the gyroscope, a driving electrode and a monitoring electrode are distributed on two sides of a mass block; one end of the driving electrode is fixedly connected with the mass block, and the other end of the driving electrode is fixed onto a silicon dioxide substrate; one end of the monitoring electrode is fixedly connected with the mass block, and the other end of the monitoring electrode is fixed onto the substrate; by means of an electricfield, the driving electrode drives the mass block to vibrate in a horizontal direction; the monitoring electrode detects the vibration amplitude of the mass block; a disturbance beam and the drivingelectrode are located on the same side of the mass block; the disturbance beam is fixedly connected with the center of the side edge of the mass block; the laser emergent direction of a laser is directly opposite to one end of an optical waveguide; the other end of the optical waveguide is directly opposite to a detector; a waveguide grating cavity is arranged on the optical waveguide; the waveguide grating cavity is located below the disturbance beam; and the disturbance beam is located in the evanescent field of the waveguide grating cavity. According to the micromechanical gyroscope of theinvention, a mechanical structure and an optical structure can be separate, so that the independent optimization of mechanical performance and optical performance can be supported.
Owner:BEIHANG UNIV

Control method of four-axis drone

The invention discloses a control method of a four-axis unmanned aerial vehicle. The method includes the following steps that: S1, the attitude data of an attitude sensor in the four-axis unmanned aerial vehicle are acquired, and filtering and fusion are carried out on the attitude data, so that current attitude information can be obtained, wherein the attitude data include a current attitude angle and an angular velocity corresponding to the attitude angle; and S2, the four-axis unmanned aerial vehicle is controlled through a cascade double-loop PID control method, a deviation value between the current attitude information and target attitude information is adopted as the input quantity of an angle PID controller, the difference value of the current angular velocity and the output quantity of the angle PID controller is inputted into an angular velocity PID controller, and the output of the angular velocity PID controller is used for controlling a motor until the four-axis unmanned aerial vehicle achieves a target attitude. With the control method of the invention adopted, more accurate measurement data can be obtained, the accuracy of attitude data can be improved; the cascade double-loop PID control is adopted, so that the anti-interference performance of a system is enhanced; and therefore, the four-axis unmanned aerial vehicle has higher adaptability.
Owner:嘉兴智旭信息科技有限公司

A stereoscopic imaging method for panoramic image pairs in a hole

The invention discloses a hole panoramic image pair three-dimensional imaging method, which comprises a basic principle, a method, an optimized design and algorithm realization. According to the basic principle of the three-dimensional imaging, an imaging method for a 360-DEG drilling hole wall panoramic image-paired image containing the location information of an imaging device is provided by utilizing the technological combination of an optical converter of a twin-conical-surface lens, the imaging device and the space location; a calculation formula of a panoramic image-paired image is derived by theoretically analyzing the hole panoramic image pair imaging principle, the optimized analysis is carried out for the parameters of relevant technology and the layout design, and the corresponding software algorithm is established; and by analyzing a key point and difficulties for realizing the algorithm, the corresponding implementation scheme and flow block diagram are compiled. By adopting the hole panoramic image pair three-dimensional imaging method, the difficult problem of panoramic and three-dimensional detection inside the hole can be solved, a scientific method is provided for the precise detection inside the hole, the breakthrough and substantive progress of the drilling photograph technology can be realized, and the remarkable scientific significance and economical practicability can be realized.
Owner:INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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