576results about "Compasses" patented technology

The invention relates to the technical field of aviation communication, and discloses a true north calibration system and method for an aviation airborne laser communication equipment alignment system, and the method comprises the steps: synchronously collecting flight data through an IMU sensor and a double-antenna GPS at a preset sampling frequency, and outputting the real-time attitude angle information of an aircraft through an IMU; filtering and de-noising the synchronously acquired IMU and double-antenna GPS data, and carrying out noise suppression and deviation compensation on accelerometer and gyroscope data output by the IMU by adopting a Kalman filtering algorithm; based on the preprocessed sensor data, calculating an initial course angle by measuring relative position change and phase difference between antennas by using a double-antenna GPS (Global Positioning System); the calibration controller transmits the calculated true north direction information to an alignment system of the laser communication equipment in real time through a communication interface; and the attitude change and external environment disturbance of the aircraft are continuously monitored in the whole flight process. The method has the advantage that the alignment performance and the communication stability of the laser communication equipment are improved.

In one embodiment, a method includes accessing magnetic data from a magnetic-measurement device. The magnetic data corresponds to one or more locations of the magnetic-measurement device. The method includes accessing geofencing data corresponding to an area; comparing the magnetic data with the geofencing data; based on the comparison, determining that the locations correspond to the area; and, based on the determination, authenticating the magnetic-measurement device for access to one or more resources.

The present invention discloses an apparatus for quickly finding a planet by using a mobile phone, including: a digital telescope, an electronic compass, a pan / tilt configured to install the digital telescope, a mobile phone, a PC terminal, and a data converter. The digital telescope includes a telescope housing. A main camera configured to photograph target starry sky and a planet-finding camera configured to search for and photograph a target planet are disposed at one end that is of the telescope housing and that faces starry sky. The present invention is used more easily when a user's professional level is reduced.

In one embodiment, a method includes accessing a first series of first magnetic values that represents a first magnetic recording that includes a first set of first magnetic measurements. Each of the first magnetic values represents one of the first magnetic measurements. The method includes accessing a second series of second magnetic values that represents a second magnetic recording that includes a second set of second magnetic measurements. Each of the second magnetic values represents one of the second magnetic measurements. The method includes approximately aligning the first and second series with each other; calculating a difference between the first and second series as aligned with each other; and determining a similarity between the first and second series based on the difference.

In one embodiment, a method includes generating navigation or localization information based on a combination of first data that are based on first measurements of a magnetic field by one or more magnetic sensors and second data that are based on second measurements by one or more other sensors. The method includes determining an anomalousness of a magnetic field and, based on the determined anomalousness of the magnetic field, at least temporarily adjusting a weight of the first measurements relative to the second measurements in the generation of the navigation or localization information.

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.

To provide a magnetic sensor device that can suitably fix a sensor substrate to a support substrate and has stable output characteristics.SOLUTION: A magnetic sensor device 1 comprises a support substrate 2 and a sensor substrate 10 fixed to the support substrate 2. The sensor substrate 10 includes: a first surface 10B facing the support substrate 2; and a second surface 10A that is located on an opposite side to the first surface 10B, the second surface 10A being provided with a functional film 20 including a plurality of magnetic detection elements E. A hole portion 11 is formed in the first surface 10B. An outline O11 of the hole portion 11 includes at least one corner C1, C2, C3..., and at least one corner C1, C2, C3... includes the first corner C1 that overlaps at least one of the plurality of magnetic detection elements E in a plan view seen in a plane-normal direction Z from the second surface 10A toward the first surface 10B. The first corner C1 has a radius of curvature of 5 μm or more.SELECTED DRAWING: Figure 17

A wearable electronic device including a magnetic strap is provided. The wearable electronic device includes a communication module, a geomagnetic sensor, a motion sensor, memory storing one or more computer programs, and one or more processors communicatively coupled to the communication module, the geomagnetic sensor, the motion sensor, and the memory, wherein one or more computer programs include computer-executable instructions that, when executed by the one or more processors individually or collectively, cause the wearable electronic device collect geomagnetic measurement values collected using the geomagnetic sensor, determine whether to update a reference magnetic field stored in the memory on the basis of offset update information of the geomagnetic sensor, when updating the reference magnetic field, designate, as reference data, geomagnetic measurement values satisfying a first condition collected within the effective time of the reference magnetic field, a second condition for collecting of magnetic field strengths within an average error range, and a third condition collected within a movement range through the motion sensor, and update the reference magnetic field based on the designated reference data.

A device can detect radio frequency (RF) signals in a physical environment using one or more antennas of a device. The device can generate RF measurements based on the RF signals. The device can also generate a multi-dimensional model of the physical environment based on sensor information from one or more sensors of the device. For example, the multi-dimensional model could be a 2D or 3D floor plan of the physical environment. The device can then map the RF measurements to locations in the multi-dimensional model. In some implementations, the device can configure a graphical user interface to display the multi-dimensional model and the mapping. For example, the display could represent a heat map for determining a change to a network. Other aspects are also described and claimed.

The invention relates to the field of marine navigation, in particular to an optical fiber compass and magnetic compass integrated calibration method, which comprises the following steps of: compensating a magnetic compass by using an optical fiber compass, and constraining course output of the optical fiber compass by using the magnetic compass as an observed quantity. According to the optical fiber compass and magnetic compass integrated calibration method provided by the invention, the working characteristics of the optical fiber compass and the magnetic compass are combined, so that the optical fiber compass and the magnetic compass are mutually complemented and mutually calibrated, the system reliability is improved, and the system precision can be improved through data fusion.

The invention provides a low-altitude target monitoring, positioning and tracking method and system based on a civil network, and the method comprises the steps: enabling a plurality of terminal devices at different positions to point to and align at a low-altitude target, collecting target measurement data, and uploading the target measurement data to a background server through the civil network; performing abnormal point detection and elimination by adopting a Z-score detection and dynamic time window filtering method, judging a target batch and a target type according to uploaded data, states and time intervals, and storing the target batch and the target type in a database in an original data form; performing fusion processing on a plurality of pieces of uploaded data through a trajectory fusion algorithm to form a target trajectory, and monitoring, positioning and tracking a low-altitude target; and the target track is sent to a front-end server for target fusion result display, and track information of all the low-altitude targets is completely displayed. According to the invention, data are collected through the terminal equipment, low-altitude targets are monitored, positioned and tracked based on a civil network, low-altitude, slow and small targets are detected and found in time, the detection efficiency is improved, and the system equipment cost is reduced.

The invention relates to a measurement precision correction method for a digital geological compass. The method comprises the following steps: determining the magnetic field stability of a target position according to the difference between total magnetic field intensities in a first interval; determining a magnetic field interference coefficient at the moment according to a difference value between the total magnetic field intensity at each moment and the total magnetic field intensity at the target moment; determining the integrating degree of the point source model at the previous moment according to the difference between the magnetic field interference coefficients at each adjacent moment and the duration of the interval between each adjacent moment and the initial moment; determining a target duration according to the magnetic field interference coefficient in the second interval and the duration of the interval between each moment and the initial moment, and correcting the magnetic field data of each axis of the compass according to the target duration and the difference between the magnetic field data of each axis at the target moment and the magnetic field data of the axis in the first interval; and carrying out azimuth calibration on the compass according to the corrected magnetic field data of each axis and the longitude and latitude of the target position. The method can improve the accuracy of geological survey.

The invention discloses an intelligent door lock body attitude measurement and dynamic compensation control method, system, equipment and medium, and relates to the technical field of measurement and survey, and the method comprises the following steps: collecting pitch angle and roll angle data, and generating real-time attitude information by using Kalman filtering; a laser ranging module based on the time flight principle is adopted to measure the distance between the lock body and the reference structure, and the measured distance is corrected in combination with data of a temperature sensor; a Hall effect magnetic sensor and an MEMS electronic compass are installed in the lock body, and magnetic field data are fused through low-pass filtering; building a digital twinborn model by utilizing the acquired attitude, correction distance and azimuth data, and simulating the three-dimensional attitude of the lock body; the real-time space coordinates of the lock body are calculated through a triangulation method, and closed-loop control is carried out. According to the invention, the precision of data fusion and the stability of the system are improved, the influence of external interference on the measurement result is reduced, and a reliable dynamic compensation control scheme is provided for the intelligent door lock system.

An electronic device displays a compass user interface with a direction indicator and a bearing indicator. The direction indicator provides an indication of a respective compass direction, wherein the appearance of the direction indicator is determined based on the 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 rotation of the rotatable input mechanism and, in response, changes the displayed position of the bearing indicator from a first position to a second position by an amount that is determined in accordance with a magnitude of the rotation of the rotatable input mechanism.

A system for a host vehicle operating on a road surface includes a polarimetric camera, a global positioning system (“GPS”) receiver, a compass, and an electronic control unit (“ECU”). The camera collects polarimetric image data of a drive scene, including a potential driving path on the road surface. The ECU receives the polarimetric image data, estimates the Sun location using the GPS receiver and compass, and computes an ideal representation of the road surface using the Sun location. The ECU normalizes the polarimetric image data such that the road surface has a normalized representation in the drive scene, i.e., an angle of linear polarization (“AoLP”) and degree of linear polarization (“DoLP”) equal predetermined fixed values. The ECU executes a control action using the normalized representation.

The disclosure is directed to a system for determining a geographic location of device. The system includes at least one antenna and a controller. The at least one antenna is configured to detect magnetic field signals. The controller is configured to identify a first set of magnetic field signals including one or more magnetic field signals having a change in angle of arrival less than or equal to a predetermined angle of arrival threshold value or a change in the location of a source less than or equal to a predetermined location threshold value. The controller is further configured to identify a second set of magnetic field signals including one or more magnetic field signals having signal strength range within a predefined signal strength range. The controller is further configured to determine a geographic location of a device based on the identified second set of magnetic field signals.

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.

A calibration method for an electronic compass includes: acquiring an initial sphere center coordinate of a current calibration; acquiring a preset number of magnetic field data collected by a magnetic sensor; determining a target magnetic field interference level of an environment according to the preset number of magnetic field data and the initial sphere center coordinate; determining a target number of the magnetic field data according to the target magnetic field interference level; and performing spherical magnetic field fitting according to the target number of magnetic field data to calibrate the electronic compass.

The invention relates to the technical field of calibration, and particularly discloses a compass calibration method, which comprises the following steps of: acquiring magnetic field and acceleration data in real time by using a three-axis magnetometer and an accelerometer, and establishing an error calibration model to compensate the bias, proportional error and non-orthogonal error of a sensor; constructing a Jacobian matrix by analyzing the influence of attitude orientation on the sensitivity of calibration parameters, and determining an optimal attitude by adopting a Gauss-Newton method; and calculating a parameter estimation change rate and a generalized likelihood ratio index in real time, and dynamically adjusting a batch processing window length and a forgetting factor by using fuzzy logic to adapt to the dynamic change of the magnetic field. According to the method, high-precision real-time compensation of dynamic magnetic field interference is realized, and the precision and robustness of compass calibration are improved.

The invention discloses an excavator operation pose monitoring method, system and equipment and a medium, and relates to the field of excavators. The method comprises the following steps: processing a video by using a rotating target detection model to obtain four-dimensional coordinates and a rotating angle of a forearm; the first distance between the tail end of the forearm and the cab is obtained according to the four-dimensional coordinates and the rotation angle, the first height of the tail end of the forearm is calculated according to the width and the vertical coordinates of the tail end of the forearm in the image frame of the video in combination with the height from the camera to the ground and the first distance, and the second distance and the second height are obtained through correction of the gradienter; working point coordinates of the tail end of the forearm are obtained according to cab positioning information, azimuth angle information, the second height and the second distance; when the working state of the excavator bucket is changed, working information is recorded, and whether the state of the excavator is normal or not is detected according to the working information. By implementing the technical scheme provided by the invention, the precision and reliability of monitoring the operation pose of the excavator are improved.

The invention discloses a vehicle-mounted GNSS (Global Navigation Satellite System) multi-interference source monitoring and direction-finding device and a monitoring and direction-finding method, the device comprises a monitoring and direction-finding antenna and a monitoring and direction-finding host, the monitoring and direction-finding antenna comprises an antenna unit, a switch matrix, an electronic compass and an antenna controller, the antenna unit is electrically connected with the switch matrix, and the switch matrix is electrically connected with the electronic compass. The switch matrix and the electronic compass are electrically connected with the antenna controller respectively; the monitoring direction-finding host comprises a radio frequency receiving module, a signal processing module, a main control module and a power supply module. The monitoring and direction finding device disclosed by the invention is high in maneuverability, and can be carried on a vehicle platform to realize rapid monitoring and troubleshooting of interference sources in a certain area; the monitoring range is wide, satellite navigation interference signals in the vehicle driving range can be monitored in real time, and the detection range is wider than that of traditional handheld interference source monitoring and direction finding equipment.

A locator device system formed by a pair of locator devices that provide an illuminated display indicating a location of another locator device. Each locator device includes a case having an exterior with a front surface and a plurality of visual indicators. The visual indicators switch between illumination states and, when illuminated, are observable by observing the front surface of the case. A controller changes the illumination states based on a position of the other locator devices. A user interface receives user inputs including pairing input for pairing the locator devices to one another. When the locator devices are paired together and are located at a predefined location relative to one other, the controller changes a selected visual indicator located a direction corresponding to a direction heading towards the other one of the pair of locator devices from the first illumination state to the second illumination state.

The invention relates to the technical field of navigation signal detection, and discloses a small portable navigation signal comprehensive detection system and method.The system comprises a building block type mobile antenna support, backpack type comprehensive detection equipment and a navigation equipment site evaluation system, the system is composed of a backpack type comprehensive detection host and an individual soldier handheld terminal, and rapid opening and comprehensive detection of navigation signals are achieved. The backpack comprehensive detection host integrates a battery, a power supply module, a high-performance signal processing board, a radio frequency channel and a medium-wave active antenna, adopts a high-performance battery and power supply management scheme and an advanced AC7Z020 core board for signal processing, and ensures high-precision and high-sensitivity detection. The system is further integrated with an electronic compass module to achieve a direction finding function, real-time data feedback and evaluation are achieved through Bluetooth communication between the individual soldier handheld terminal and the host, the detection convenience and reliability are greatly improved, and the system is particularly suitable for scenes such as field environments, emergency rescue and military actions.

The technology described herein relates to, among other topics, augmented reality devices and systems. In particular, the technology relates to a system for generating an augmented reality environment where an augmented reality display can be displayed (e.g., via safety glasses). The augmented reality display can include information for a user to navigate and / or operate a vehicle within a particular location, where geofencing technology can be used to establish subareas within the location.

A mouth guard senses impact forces and determines if the forces exceed an impact threshold. If so, the mouth guard notifies the user of the risk for injury by haptic feedback, vibratory feedback, and / or audible feedback. The mouth guard system may also remotely communicate the status of risk and the potential injury. The mouth guard uses a local memory device to store impact thresholds based on personal biometric information obtained from the user and compares the sensed forces relative to those threshold values. The mouth guard and its electrical components on the printed circuit board are custom manufactured for the user such that the mouth guard provides a comfortable and reliable fit, while ensuring exceptional performance.

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 discloses electronic digital compass equipment, which comprises a vector sensing module, a data processing module, a trigger module, a result output module and a storage module, and is characterized in that the vector sensing module is used for acquiring original vector data required by geological survey, and ensuring the accuracy and environmental adaptability of data acquisition; the data processing module is used for receiving original data of the vector sensing module and calculating geological elements through coordinate transformation, vector operation and a calibration algorithm, the trigger module is used for controlling measurement starting time and ensuring that equipment collects data in a stable state, and the result output module is used for displaying the geological elements of a measurement surface in real time in a digital mode. The storage module is used for storing data according to a geological survey format to avoid artificial transcription errors; according to the invention, through an electronic and digital measurement mode, accurate measurement of geological elements of field geological levels or sections is realized, and the precision and efficiency of measurement of geological elements such as tendency and trend in geological survey are effectively improved.

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.