116 results about "Compass" patented technology

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 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 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 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.

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 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.

The embodiment of the invention provides a direction detection method, device and equipment and a readable storage medium, electronic equipment obtains a target image, and the target image is an image obtained by shooting a compass arranged on the surface of a fan cabin. Afterwards, the electronic equipment recognizes a dial plate area of the compass from the target image, a magnetic needle in the dial plate area points to the north pole of the geomagnetism, a direction pointer points to the direction of the fan cabin, a pointer included angle between the direction pointer and the magnetic needle in the clockwise direction is determined according to the dial plate area, and the direction of the fan cabin is determined according to the pointer included angle. By adopting the scheme, the low-cost compass is arranged on the surface of the fan cabin, the image obtained by the compass arranged on the surface of the fan cabin is shot, and the electronic equipment can determine the direction of the fan cabin according to the dial plate area of the compass in the target image, so that the direction of the fan cabin is detected by utilizing the low-cost universal compass; the purpose of reducing the direction detection cost is achieved.

This invention discloses a navigational ADCP measurement vessel orientation warning system based on sensor data fusion, belonging to the field of hydrological measurement technology. It includes: a sensor data acquisition module, which collects target vessel sensor data in real time based on electronic compass and gyroscope sensors; a data processing module, which uses a Kalman filter fusion algorithm to establish an attitude estimation state-space model, recursively predicts the target vessel's heading angle through state equations, and combines observation equations with real-time sensor data information to obtain the optimal estimated value of the heading angle, acquiring the real-time heading angle after data fusion; a lighting control module, which sets a heading angle threshold range to determine the real-time heading state of the vessel; if the real-time heading angle is continuously and stably within a preset angle range for more than 1 second, a corresponding color control signal is dynamically generated; and a fault self-checking module, which defines and executes a periodic self-checking and online calibration process for the electronic compass and gyroscope sensors. This invention improves the maintainability of the system.

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.

This invention relates to the field of maritime navigation, providing a method, system, device, and medium for satellite positioning follow-up based on multi-source data. The method includes acquiring navigation data through navigation equipment, determining a reference timestamp, selecting a time window based on the reference timestamp and aligning the data to obtain satellite navigation data, log data, inertial navigation data, and compass data; calculating the yaw angle using the satellite navigation data and compass data, calculating the current velocity using the satellite navigation data and log data, and using the current velocity and yaw angle for follow-up; calculating the position offset based on the inertial navigation data, calculating the longitude and latitude changes using the position offset to obtain high-frequency satellite navigation data; calculating the position deviation, course deviation, and track speed deviation using the high-frequency satellite navigation data, and verifying the satellite navigation data using the position deviation, course deviation, and track speed deviation. This invention can both follow up and verify satellite navigation data.

The application discloses a kind of field ecological geology survey auxiliary device, geological survey surveying technical field, including surveying and mapping shell, the inside of surveying and mapping shell is equipped with drawing board, the outside of surveying and mapping shell is respectively fixedly connected with latitude display compass and longitude display compass, the inside of latitude display compass is rotatably provided with pointer, latitude adjusting screw is rotatably connected between fixed rotating plate and surveying and mapping shell, the side of threaded slide block away from surveying and mapping shell is fixedly connected with fixed slide, fixed slide is equipped with locating pin, the inside of surveying and mapping shell is provided with latitude adjusting assembly and longitude adjusting assembly, positioning is not needed manually hand-drawing during use, positioning is carried out by rotating longitude and latitude handle and observing longitude and latitude scale, can greatly reduce operation time, improve work efficiency, can reduce the point deviation caused by improper operation or error, improve the accuracy of fixed point, to reduce the shift of the drawing and actual geology and ecology.

The invention relates to the technical field of spaceflight, and discloses an astronomical compass attitude drift correction method, device and equipment and a medium, the method comprises the following steps: determining a first measurement error corresponding to an accelerometer in an astronomical compass and a second measurement error corresponding to a sun sensor; determining an initial weight according to the first measurement error and the second measurement error; obtaining observation data of the astronomical compass in a preset time period; determining the attitude drift distance of the astronomical compass according to the initial weight and the observation data; determining whether the attitude drift amount meets a preset correction condition; if the attitude drift amount does not meet the preset correction condition, adjusting the initial weight to obtain an adjusted weight; and recalculating the attitude drift distance based on the adjusted weight until the recalculated attitude drift distance meets a preset correction condition. The correction precision of the astronomical compass can be improved.

The utility model discloses an iron compass capable of inserting a gel pen refill or a ball-point pen refill, and relates to the field of circular curve drawing. The compasses solve the problems that a curve is irregular and time and labor are wasted in the drawing process due to the fact that existing compasses cannot directly draw colored circles or arcs. An insertion leg (B) of a gel pen refill or a ball-point pen refill is detachably arranged on a right connecting rod (1); the gel pen refill or ball-point pen refill insertion leg (B) comprises an insertion pin (2) and a locking cap (3), the middle of the insertion pin (2) along the axis of the insertion pin (2) is hollow, the upper portion of the insertion pin (2) is inserted into the right connecting rod (1), a plurality of clamping jaws (4) are arranged on the lower portion of the insertion pin (2), a gel pen refill or ball-point pen refill is inserted into the insertion pin (2), and the locking cap (3) is arranged on the insertion pin (2) in a sleeved mode and clamps the clamping jaws (4) in a screwing mode. And the locking cap (3) clamps the clamping jaw (4) and clamps a gel pen refill or a ball-point pen refill at the same time. The circular curve drawing device is used for drawing circular curves.

The utility model relates to the technical field of compasses, in particular to a pair of compasses capable of automatically storing a central needle, which comprises a fixed foot and a rotating foot, the top ends of the fixed foot and the rotating foot are rotatably connected, the bottom end of the fixed foot is provided with an inner groove, and a needle head assembly is mounted in the inner groove and comprises a pressing rod. A retreating groove is formed in one side of the middle of the pressing rod, an elastic clamping rod is installed at the retreating groove, a lower clamping opening is formed in the lower portion of one side of the inner groove and matched with the elastic clamping rod in a clamped mode, a fixing piece is installed at the position, close to the elastic clamping rod, of the rotating foot, and a driving column is slidably arranged in the middle of the fixing piece. According to the compasses capable of automatically storing the center needle, through ingenious mechanical design, the automatic storage function of the center needle is achieved. After the compasses are used, the needle head assembly can be automatically driven to retract only by simply closing the fixed foot and the rotating foot, manual operation is not needed, and the storage process is greatly simplified.