154 results about "Compass" patented technology

The invention discloses a map navigation method and system based on integrated navigation, and particularly relates to the field of integrated navigation, comprising compass data acquisition, magnetic declination correction, map integration, navigation system data acquisition, navigation system data analysis and integrated navigation. According to the method, the precision and robustness of the navigation system are remarkably improved, different environments can be dynamically adapted, and the error influence is reduced; rich geographic information support is provided by presetting an electronic map and POI marks; the real-time navigation service provides visual road condition information and path planning, the user experience is enhanced, and on the whole, more accurate, reliable and convenient navigation service is provided for the user.

The invention provides a satellite compass installation error adaptive correction method, device and equipment and a storage medium, and the method comprises the steps: obtaining the operation data of a ship, and carrying out the preprocessing of the operation data; then, whether the navigation state meets a correction condition or not is evaluated according to the preprocessed operation data; when it is judged that the sailing state meets the correction condition, a multi-dimensional reliability factor is calculated according to the ship speed, the course change rate and the attitude change degree, a time weighting coefficient is calculated according to the accumulated operation time of the system, and the observation noise variance of a Kalman filter is jointly adjusted based on the multi-dimensional reliability factor and the time weighting coefficient; and performing Kalman filtering adaptive state prediction and updating based on the observation noise variance so as to extract an estimated value of the installation error of the satellite compass, and applying the estimated value of the installation error of the satellite compass to course data output by the satellite compass by adopting a progressive strategy. The installation error of the satellite compass is automatically corrected, so that the navigation requirement of a ship in long-term navigation is met.

The invention discloses an RTK (Real Time Kinematic) and IMU (Inertial Measurement Unit) fusion state estimation method based on adaptive weight. According to the method, an observable state estimation system is established by using two RTK-GPS antennas and an IMU device based on a self-adaptive Kalman filtering framework. By constructing a proper antenna layout, the connecting line for connecting the two GPS antennas is not parallel to the acceleration vector, so that the observability condition is met, and the attitude error caused by gyroscope drift is effectively compensated. Compared with a traditional single-GPS fusion scheme, high-precision estimation of the three-dimensional attitude and position can be achieved without an additional attitude measurement device such as a magnetic compass, a self-adaptive covariance estimation strategy based on a sliding window is introduced, the GPS measurement noise level is evaluated in real time, the fusion process is endowed with a high weight only when GPS information is reliable, and the fusion precision is improved. The method effectively improves the robustness of the system, is suitable for unmanned ship navigation tasks in various water area environments, and has a wide engineering application prospect.

The invention relates to an inertial navigation / polarization compass / laser velocimeter integrated navigation method, which belongs to the technical field of inertial navigation / integrated navigation, and comprises the following steps: mounting and fixing an inertial navigation system, a polarization compass and a laser velocimeter on a carrier, and acquiring coordinate systems of sensors; establishing a polarization compass error equation and a laser velocimeter error equation by considering a course angle installation error, a pitch angle installation error and a scale error of the laser velocimeter; and deriving an inertial navigation / polarization compass / laser velocimeter combined system state equation based on the error equation, establishing a measurement equation by taking the difference between the speed calculated by inertial navigation and the speed of the laser velocimeter and the product of the polarization vector of the polarization compass and the sun vector as observed quantities, and carrying out estimation and feedback correction on the system state. The invention provides an inertial navigation / polarization compass / laser velocimeter combined navigation method in a satellite navigation denial environment, which realizes full-autonomous and high-precision directional positioning.

The invention belongs to the technical field of inertial navigation, and discloses a modulation inertial navigation real-time health monitoring method based on observation enhancement, which ensures the navigation safety of a carrier in a long-endurance task. According to the method, redundant configured inertial navigation system resources are fully utilized, relative postures, speeds and positions between two sets of single-axis rotation modulation inertial navigation systems are used as constraints for observation, an error model of the inertial navigation system is optimized, and a residual normalized joint error state adaptive state monitoring filter is established; a health state monitoring criterion is established, a threshold value is determined in real time based on estimation output of a filter, meanwhile, an azimuth gyroscopic drift variation fitting method based on the compass effect is designed to achieve separation estimation of azimuth gyroscopic drift, and then real-time monitoring of the health state of the inertial device is achieved. The method does not need the assistance of external information, and provides powerful guarantee for the safety and reliability of long-endurance navigation.

The invention discloses a hinged wheel type pipeline robot positioning method based on multi-sensor fusion ESKF, which takes the ESKF as a core, predicts the nominal state of an IMU through a double-subsample INS mechanical arrangement method, introduces an adaptive slip detection method based on IMU kinematics consistency constraint to perform reliability verification on multi-encoder observation, and finally determines the position of the hinged wheel type pipeline robot. Speed observation fusion is realized; meanwhile, heading updating of the magnetometer is triggered through magnetic field stability detection, and long-term drift is restrained; a pseudo measurement constraint model is established based on pipeline environment characteristics, and accumulative errors are systematically inhibited; and after feedback compensation is carried out on IMU errors and navigation errors through ESKF measurement updating, position, speed and attitude navigation data are output in real time. And finally, performing global posterior optimization on the real-time filtering trajectory by adopting an RTS reverse smoothing algorithm, thereby effectively solving the problems of low positioning precision and insufficient adaptability of a multi-section hinge wheel type pipeline robot structure in a complex underground pipe network.

The invention relates to a cutter suction dredger complex section accurate excavation control method and system, and the method comprises the steps: firstly constructing a design section based on geological survey data or construction scheme parameters, and collecting the data of high-precision positioning equipment and related sensors in real time; comprise ship positioning latitude and longitude coordinates, a bridge angle, trunnion draft, a tide level, a compass direction, a trolley stroke and a transverse moving winch cable speed, and the digging depth, the coordinates, the lifting and lowering speed and the transverse moving speed of the reamer are calculated by combining ship type parameters; the method comprises the following steps: firstly, acquiring a reamer coordinate, then acquiring a slope ratio, a sideline coordinate and a design depth of a current design section through the reamer coordinate, calculating a deviation between the reamer position and the design section in real time, and finally, automatically adjusting motion parameters of a reamer through a system built-in control model in a set excavation mode to ensure that an excavation track of the reamer accurately follows the design section. The efficient, accurate and uniform excavation effect is achieved, and the construction accuracy and efficiency of complex section excavation can be remarkably improved.

The invention relates to the technical field of geological survey and surveying and mapping, and discloses a geological survey and surveying and mapping method and device.The geological survey and surveying and mapping method comprises the following steps that S1, when the rock stratum attitude is surveyed and mapped, the rock stratum trend is measured through a trend measuring mechanism installed on a compass shell; s2, one side line of the compass shell is laterally and vertically attached to the rock stratum surface, the side line is made to be perpendicular to the trend line measured in the step S1, and then the rock stratum dip angle is measured through a dip angle measuring mechanism installed on the compass shell. According to the geological survey and surveying and mapping method and device, when the dip angle of a rock stratum is measured, the vertical level gauge can be automatically triggered to rotate anticlockwise or clockwise along the center of the compass to be centered, manual debugging of the vertical level gauge is avoided, and the measurement precision is greatly improved.

The present disclosure relates to integration of integrated photonics-based optical gyroscopes and fiber-based optical gyroscopes into portable apparatuses that may include compass features. Novel small-footprint modularized fully integrated photonics optical gyroscopes are used for non-critical axes. However, for at least one critical axis, a fiber-optic gyroscope can be used to provide bias stability below 0.1° / Hr, which is directly correlated to predicting positional accuracy in the centimeter range. The positional accuracy results from the compassing ability of the gyroscope (referred to as gyrocompass) to calculate direction of heading using the earth's rotation.

The invention relates to a novel magnetic compass autodyne correction auxiliary device and method. The novel magnetic compass autodyne correction auxiliary device comprises an electronic compass, a three-axis magnetic field intensity meter and a data terminal, the output ends of the electronic compass and the three-axis magnetic field intensity meter are connected with the data terminal, and the three-axis magnetic field intensity meter is used for quantitatively measuring environmental magnetic field distortion measurement data; the electronic compass is used for acquiring magnetic heading information; the output end of the data terminal is connected with the magnetic compass autodyne correction device, and is used for receiving information from the electronic compass and the three-axis magnetic field intensity meter, calculating compass north pointing force and autodyne force through magnetic compass autodyne correction software according to a magnetic compass autodyne correction equation, calculating the correction amount of the magnetic compass autodyne correction device, and outputting the correction amount of the magnetic compass autodyne correction device. And outputting an autodyne correction result through the magnetic compass residual autodyne table or the residual autodyne curve, and outputting the autodyne correction result to the magnetic compass autodyne correction device. Quantitative description of the distortion degree of the working magnetic field of the magnetic compass and detection of the autodyne correction result are completed through the sensor, and the ship operation cost is saved.

Wearable electronic devices can be equipped with global positioning system (GPS) location sensors that can be used to determine its latitude and longitude coordinates. The device can include a magnetometer sensor to determine its direction on a digital compass. The device can be used to configure the location of a GPS boundary. The size and shape of the boundary can be configured on either the wearable device or a separate computing device. The wearable device can be either inside of a boundary or outside of a boundary. The boundaries can have assigned priority levels that may determine the information displayed on the device. The device can traverse boundaries of different priority levels that may determine the information displayed on the device. The device's boundary status can be relayed to a server for data processing.

A UWB-based planar positioning method, apparatus and system, relating to the technical field of positioning in complex environments. On the basis of a second-order interlocked optimization mechanism using distances related to dual anchors and a heading angle for positioning error reduction, the method inputs known distances related to two anchors and a reliable heading angle of an electronic compass into a two-layer interlocked optimization model to obtain positioning coordinates, thus reducing NLOS interference, and improving the positioning precision.

The invention discloses a navigation method based on underwater polarized light detection, which belongs to the technical field of navigation, is used for underwater navigation, and comprises the following steps: collecting polarization images by a polarization camera, calculating a polarization angle by combining with a single scattering model, and outputting a pitch angle and an azimuth angle of the polarization camera by a three-dimensional electronic compass; the polarization angle and the position of the polarization camera are input into a sun position resolving module together for processing, a sun azimuth angle and a sun zenith angle are obtained, and then latitude and longitude are output through a latitude and longitude resolving module. Underwater navigation is realized by combining polarized light, and longitude and latitude errors of navigation are respectively 0.17609 degrees and 0.24156 degrees by combining the result of the embodiment, so that a novel underwater navigation method is successfully realized.

The invention relates to the field of marine navigation, and provides a satellite positioning continuous compensation method, system and device based on multi-source data and a medium, and the method comprises the following steps: obtaining navigation data through a navigation device, determining a reference timestamp, selecting a time window according to the reference timestamp, and carrying out data alignment to obtain satellite navigation data, log data, inertial navigation data and compass data; the yaw angle is calculated through satellite navigation data and compass data, the water flow speed is calculated through the satellite navigation data and log data, and continuous compensation is conducted through the water flow speed and the yaw angle; calculating a position offset according to the inertial navigation data, and calculating a longitude variation and a latitude variation through the position offset to obtain high-frequency satellite navigation data; the high-frequency satellite navigation data is used for calculating the position deviation, the track direction deviation and the track speed deviation, the satellite navigation data are verified through the position deviation, the track direction deviation and the track speed deviation, and the satellite navigation data can be supplemented and verified.

The present invention relates to the field of navigation equipment technology, and in particular to an intelligent sensing navigation mark device and an early warning method thereof, including an AIS receiving unit, a control unit, a compass sensor, a positioning unit and an LED warning light; a Raspberry Pi PC and an 8-way switch on-off controller are integrated inside the control unit, and the AIS receiving unit forwards the message to the Raspberry Pi PC of the control unit to enter the data processing process after receiving the AIS message; the AIS receiving unit is used to receive the AIS message of the ship in the waters near the navigation mark, and extract the ship coordinates and speed and heading information after parsing; the compass sensor is used to obtain the rotation angle of the navigation mark, and the positioning unit is used to obtain the position of the navigation mark; the control unit controls the operation of the LED warning light. The present invention integrates a variety of information technologies to collect navigation environment data in real time. When a ship approaches, it can actively warn the ship to avoid it, reduce the economic losses and navigation risks caused by collision, greatly improve the efficiency of navigation mark navigation at night, and make navigation in waters safer.

The invention relates to the technical field of navigation, and provides a magnetic compass error model calibration method and system, and the method comprises the steps: obtaining three-axis magnetic field data of a target magnetic compass under a target attitude; determining a magnetic declination angle and a magnetic inclination angle of the target position according to the longitude and the latitude of the target magnetic compass under the target attitude; determining geomagnetic real data under the target attitude according to the magnetic declination angle and the magnetic inclination angle; determining a geomagnetic conversion matrix according to the three-axis magnetic field data; wherein a vector difference value between the three-axis magnetic field data and the geomagnetic real data after the geomagnetic conversion matrix operation is not greater than a preset vector difference value; determining a target function according to the geomagnetic real data and the geomagnetic conversion matrix; solving the target function through an iterative algorithm to obtain an optimal solution of the target function; and obtaining corrected three-axis magnetic field data according to the geomagnetic conversion matrix corresponding to the optimal solution, and calculating the magnetic heading of the magnetic compass sensor according to the corrected three-axis magnetic field data.

1. The name of the design product: compass. 2. The use of the design product: for drawing. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

The utility model discloses an auxiliary support for a compass calibration map, which belongs to the technical field of compass calibration map auxiliary devices and comprises a stable support and a supporting platform arranged on the stable support, the supporting platform comprises a mounting disc, a plurality of mounting ports are formed in the circumferential direction of the mounting disc, and a plurality of supporting strips are rotatably clamped in the mounting ports. The supporting strips are connected through canvas faces. The mounting disc is vertically provided with a pressing part and a bearing part, the periphery of the pressing part is sleeved with a first telescopic spring, one end of the first telescopic spring abuts against the bearing part, and the other end abuts against the supporting strip; the pressing part comprises a column body, and the column body is provided with a button in the horizontal direction; the cylinder is sleeved with the cylinder, and a notch matched with the button is formed in the side wall of the cylinder. According to the auxiliary bracket for calibrating the map by the compass, the supporting strip can be expanded by pressing the column body and utilizing the first telescopic spring, and the supporting strip and the notch are fixed through the button, so that the stable setting of the supporting surface is realized, the map is convenient to place and calibrate, the portability is high, and the operation is easy.

1. The name of the design product: compass. 2. The use of the design product: the design product is used as a tool for drawing circles or arcs in learning or working. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The invention relates to a device for reflecting daylight in a fixed direction chosen by the user, despite the sun's movement. The device is distinguished by its ability to be placed in any position and requires no calibration by the user. It positions itself in the Earth's frame of reference using an accelerometer coupled to a solar sighting system, which allows it to determine its position in the Earth's frame of reference and orient the mirror to maintain a constant direction of the reflected beam. The beam is unaffected by any cast shadows, and the system's accuracy is increased compared to compass-based devices. (Shorthand figure: Figure 1)

This invention discloses a three-component microseismic sensor fixing and orientation device and its working method. The three-component microseismic sensor is fixed in a sensor arrangement chamber, with its three components perpendicular to each other. Simultaneously, the directions of the three components are consistent with the calibration directions of the three-axis coordinates on the azimuth detection assembly cover. The arrangement chamber sleeve is placed inside the borehole and tightly connected to the surrounding area. The sensor arrangement chamber is placed inside the arrangement chamber sleeve. An inclination sensor installed inside the sensor arrangement chamber reads the inclination data of the current sensor arrangement chamber. Simultaneously, using the azimuth detection assembly cover, through rotation and leveling, the coordinate cover and compass cover are aligned on the same horizontal plane, and the azimuth data of the compass is read. This data is combined with the inclination data to accurately determine the azimuth and attitude of the three-component microseismic sensor. This ensures the consistency of the placement of multiple microseismic sensors, ultimately providing accurate data support for subsequent microseismic monitoring and processing.

The point fixing device comprises a bottom plate and a tripod at the bottom, a middle shaft is vertically arranged at the upper end of the bottom plate, a bearing is rotationally sleeved outside the middle shaft, a rotating drum is rotationally sleeved outside the bearing, an adjusting bolt is arranged on the side wall of the rotating drum in a threaded connection and penetrating mode, and a braking vane is arranged in a crack between the middle shaft and the rotating drum. A horizontal compass is arranged at the top of the middle shaft, a mounting seat is arranged on the side wall of the rotating drum, an outer pipe is detachably and fixedly mounted on the mounting seat and is perpendicular to the middle shaft, an inner rod is slidably inserted into the outer pipe and is perpendicular to the middle shaft, and a marker post is vertically and fixedly arranged above the tail end of the inner rod; a locking structure used for fixing the inner rod is further arranged on the outer pipe, and a target rod is further vertically arranged on the top of the installation base and located on the periphery of the horizontal compass. The device can effectively solve the problem that the marker post is shielded by a shielding object when a reference point is set on a fall land, and can accurately reproduce the position of the marker post during re-measurement, so that the surveying and mapping precision and efficiency are improved.

The application discloses a surface layer alignment assembly system for a compass operating unit, which is used for aligning and assembling a surface layer on an aluminum panel of the compass operating unit and comprises a clamping assembly and a positioning driving assembly; the clamping assembly is slidably connected with the positioning driving assembly; the clamping assembly can clamp and hold the aluminum panel to extend horizontally and transversely; the surface layer can be clamped at the lower end of the positioning driving assembly; the positioning driving assembly can be aligned and assembled with the clamping assembly and can align and assemble the surface layer on the aluminum panel; and the application can solve the technical problem that the surface layer of the compass operating unit is manually assembled by an assembler, which can easily cause position deviation during the surface layer assembly.

This disclosure generally relates to user interfaces for compass applications. An electronic device displays a compass user interface having a direction indicator and a bearing indicator. The direction indicator provides an indication of a respective compass direction, where an appearance of the direction indicator is determined based on an orientation of the electronic device relative to the respective compass direction. The bearing indicator provides an indication of an offset from the respective compass direction. While displaying the bearing indicator, the electronic device detects a rotation of a rotatable input mechanism, and in response, changes a display position of the bearing indicator from a first position to a second position, the amount of change determined according to a magnitude of the rotation of the rotatable input mechanism.

The present application relates to the field of marine navigation technology of ship, specifically relates to a ship marine navigation system based on compass direction finding and satellite fusion, comprising a data acquisition module, a disturbance correlation analysis module, a pseudo course determination module, a navigation credibility evaluation module, a dynamic fusion weight adjustment module and a stable heading output module;Through collecting the compass heading data, satellite positioning data and ship body attitude data of the target ship, the correlation between the heading change and the roll disturbance is analyzed, and the pseudo heading change caused by the sea state disturbance is identified in combination with the track change state;Based on the disturbance correlation result, the credibility of the compass navigation and satellite navigation is dynamically evaluated, and the fusion weight of different navigation data is adaptively adjusted to generate stable heading information, which is beneficial to reduce the influence of ship body attitude disturbance on the heading measurement result under complex sea state conditions, and improve the continuous stability and navigation reliability of ship heading navigation.

Systems, methods, and apparatuses for a self-locating compass for use in navigation are disclosed. The self-locating compass is operable to provide position and / or velocity without information from a global positioning system (GPS) device. The self-locating compass includes a direction finder and a Lorentz force detector. The method includes determining orientation with respect to Earth's magnetic field, measuring a Lorentz force proportional to rate of change of location with respect to the field, determining a change in location, and updating location.

The invention relates to the technical field of spatial calibration, and discloses a calibration device and method for spatial calibration of a magnetic compass of an airborne display, the calibration device and method for rapid spatial calibration of the magnetic compass of the airborne display only need to fix and dismount the airborne display once in the whole calibration process, and the calibration efficiency is greatly improved. Spatial calibration can be quickly performed on the magnetic compass in the product, the spatial calibration precision and efficiency are improved, the calibrated magnetic compass can generate a more accurate course, and the precision of the output attitude of the product is ensured.

The invention relates to the technical field of geomagnetic navigation and magnetic sensors, in particular to a marine magnetic compass dynamic autodyne compensation algorithm and a marine magnetic compass dynamic autodyne compensation device fusing an electron magnetic difference map, which comprises the following steps of: establishing a marine magnetic compass autodyne model, and describing the relationship between the magnetic compass autodyne and factors such as ship course, geographic position and environmental magnetic field by adopting a high-order polynomial model; by fusing the accurate magnetic difference information of the electron magnetic difference map and the ship magnetic field and attitude data acquired in real time, and combining with the advanced autodyne model and the adaptive filtering algorithm, the magnetic compass autodyne can be accurately calculated in real time, effective compensation is performed, the pointing precision of the magnetic compass is greatly improved, and the accuracy of the magnetic compass is improved. The autodyne compensation precision of the magnetic compass is within + / -0.5 degrees, and the autodyne correction method is obviously superior to a traditional autodyne correction method.

The present invention discloses a device and method for measuring the actual occurrence and thickness of field strata, including a direction measurement disk and a transparent ball installed inside the direction measurement disk; an angle measurement disk is installed on the disk surface of the direction measurement disk through a rotary connection disk, and the angle measurement disk can freely rotate around the central position of the direction measurement disk. An inclination measurement column is installed on the rotary connection disk through a measurement column fixing rotary knob. The lower end of the inclination measurement column can rotate around the measurement column fixing rotary knob, and the inclination measurement column can rotate synchronously with the angle measurement disk; an alcohol-ether mixture is arranged inside the inclination measurement column. A horizontal marking line is arranged along the longitudinal center position of the inclination measurement column, and a vertical marking line is arranged along the transverse center position of the inclination measurement column. A compass is arranged at the top of the inclination measurement column; the present invention improves the measurement accuracy of strata occurrence parameters and can significantly improve the operation difficulty during occurrence measurement in a complex environment.

Systems, methods, and apparatuses for a self-locating compass for use in navigation are disclosed. The self-locating compass is operable to provide position and / or velocity without information from a global positioning system (GPS) device. The self-locating compass includes a direction finder and a Lorentz force detector. The method includes determining orientation with respect to Earth's magnetic field, measuring a Lorentz force proportional to rate of change of location with respect to the field, determining a change in location, and updating location.