104 results about "Orientation measurement" patented technology

According to an aspect, there is provided a personal care device (2) for performing a personal care operation on a subject, the personal care device (2) being configured to determine a location of the personal care device (2) on a body part of the subject. The personal care device (2) comprises an orientation sensor (6) configured to measure a three-dimensional, 3D, angular orientation of the personal care device (2) relative to Earth's gravity over time and output a corresponding orientation measurement signal; a surface-displacement sensor (10) configured to measure a two-dimensional, 2D, displacement of the personal care device (2) relative to a skin surface of the body part and output a corresponding surface-displacement measurement signal; a processing unit (22) configured to determine the location of the personal care device (2) on the body part based on the orientation measurement signal, the surface-displacement measurement signal and a skin contact signal indicating whether the personal care device (2) is in contact with the skin surface of the body part.

A welding system comprises a hand-held weld tool comprises a positioning and orientation measurement system having an inertial measurement unit (IMU), a processing subsystem, and a calibration apparatus. The processing subsystem is operable to compute, based on data generated by the IMU during a weld operation on a workpiece, one or more actual motion attributes for the hand-held weld tool. The calibration apparatus is configured to hold the hand-held weld tool in a known position and orientation and in stationary state for calibration of the positioning and orientation measurement system.

The invention discloses a mobile bridge type multi-sensor 3D scanning system, and belongs to the technical field of 3D scanning, and the system comprises a measurement platform which is used for placing a measured object; the three-coordinate bridge type measurement structure realizes omnibearing measurement of a measured object; the dynamic coding transmitting module is used for dynamically adjusting the signal transmitting direction or frequency; the multi-mode sensing module is used for receiving the light reflected back from the measured object and performing full-dimensional data capture on the data of the measured object through data received by different types of sensors; and the data fusion processor is internally provided with a hypergraph neural network model to realize feature fusion of multi-source heterogeneous data received by different types of sensors. According to the invention, high-precision, omnibearing and intelligent measurement of the measured object is realized.

The invention discloses a high-precision well deviation and azimuth measurement method based on a multi-axis sensor, and the method comprises the steps: 1, building a local navigation coordinate system of an underground environment in consideration of the influence of the earth curvature and the earth rotation, and obtaining a reconstruction signal; 2, based on the sensor mass of the four-axis sensor, considering the Coriolis force influence caused by earth rotation, and calculating a Coriolis force compensation vector; 3, calculating the projection of the geomagnetic field in the local navigation coordinate system to obtain a geomagnetic field projection vector; and 4, according to the gravity compensation value, the Coriolis force compensation vector and the geomagnetic field projection vector, in combination with the reconstruction signal, calculating a corrected hole drift angle and a corrected azimuth angle. According to the invention, the precision of well deviation and azimuth measurement is obviously improved.

A method of assessing the balance impairment of a subject includes the steps of presenting the subject with a static scene on a display, collecting a first set of orientation measurements, presenting the subject with an unstable scene on a display, collecting a second set of orientation measurements, storing the first and second sets of orientation measurements on a computing device, referenced to a set of time indices, and calculating a balance score for the subject by comparing the second set of orientation measurements with the first set of orientation measurements. A system for assessing the balance impairment of a subject is also disclosed.

The invention provides a rock slope kinematics analysis method based on an unmanned aerial vehicle digital rock field model, which combines manual extraction of discontinuous data from the digital rock field model and kinematics analysis performed by using an automatic algorithm, and the algorithm upgrades and updates a traditional Markland test. In complex geological environments, manual mapping provides more statistically robust and geologically reliable discontinuity direction measurements, which are verified by the user's professional skills. According to the new algorithm, the 3D space relation between the discontinuous network and the rock slope is combined, so that kinematics characterization can be carried out on the rock cliff more accurately and specifically, and the key plane and the potential rock mass damage volume are emphasized through 3D visualization. The new method significantly reduces the time, workload and cost of an engineering project, allowing quantitative definition of potential unstable regions by rapid analysis.

The invention discloses a mining small-sized anti-vibration trepanning directional measurement device and method. The mining small-sized anti-vibration trepanning directional measurement device comprises a battery module, a measurement module, a vibration reduction module, a display module, a power switch and a charging interface, the measurement module comprises an MEMS gyroscope, an MEMS accelerometer, a conductive slip ring, a servo mechanism, an IMU module, a main control board, a motor control board and an external interface connector. Based on the high-precision small-size MEMS gyroscope, the MEMS accelerometer and the integrated small IMU, the equipment size is reduced, the cost is reduced, and the power consumption of the whole machine is reduced; through a four-position north-seeking method, the measurement time is shortened, and high-precision autonomous orientation is realized; based on an integrated small IMU, the tapping direction is updated in real time through quaternion calculation, and dynamic tracking measurement is achieved in the drilling machine adjusting process; according to the vibration reduction module and the vibration reduction method, the vibration resistance problem of an MEMS device is solved, the data quality of an MEMS gyroscope and an MEMS accelerometer is improved, vibration reduction filtering in the tracking process is achieved, and the equipment orientation precision is improved.

A method is provided. The method includes: obtaining global position and orientation information of a first trajectory point; determining at least one pair of second trajectory points based on the global position and orientation information; obtaining a relative position and orientation estimation information and a relative position and orientation measurement information of each pair of second trajectory points; and calculating a local rotation offset at the first trajectory point based on the relative position and orientation estimation information and the relative position and orientation measurement information of each pair of second trajectory points in the at least one pair of second trajectory points to correct the global position and orientation information.

The present application relates to a kind of unmanned aerial vehicle impact interception methods based on monocular vision, the azimuth measurement information and angle measurement information of target unmanned aerial vehicle are calculated by target detection algorithm based on monocular vision;Azimuth measurement information and angle measurement information are used, through orthogonal projection matrix and algebraic transformation, non-linear measurement is converted into pseudo-linear form, then pseudo-linear adaptive Kalman filtering algorithm is carried out to estimate the position of target unmanned aerial vehicle, finally, unmanned aerial vehicle maneuvering strategy is used to control impact unmanned aerial vehicle to realize the impact interception of target unmanned aerial vehicle.The method of the present application is obviously improved in system noise robustness, target state estimation accuracy and pursuit efficiency.The present application also relates to impact unmanned aerial vehicle guided by the above impact interception method.

The invention relates to the technical field of tubular pile perpendicularity detection, in particular to a self-adaptive tubular pile perpendicularity detection method. The method comprises the steps that a tubular pile is moved to a target pile pressing point position, and pressure is applied to the tubular pile; the distance sensor detects the vertical height from the top of the pipe pile to the pile clamping opening; according to data detected by the laser range finders, determining bevel edge distances, bottom edge distances and two-edge included angles from the point locations of the laser range finders to the pipe pile, and calculating the actual height of the pipe pile; the actual perpendicularity of the pipe pile is obtained according to the vertical height and the actual height; for the condition that the actual perpendicularity of the pipe pile is not in the preset perpendicularity interval of the pipe pile, arranging the actual perpendicularity data set of the pipe pile according to the moving direction of the laser range finder to obtain an actual perpendicularity data string of the pipe pile; and the influence factors that the actual perpendicularity of the pipe pile is not in the preset perpendicularity interval of the pipe pile are determined by analyzing the actual perpendicularity data string of the pipe pile. According to the method, the deviation of the pipe pile in the pile pressing process is timely and accurately found through multi-directional measurement of the perpendicularity of the pipe pile.

Systems and techniques are provided for determining a pose. A process can include obtaining inertial measurement unit (IMU) data from an IMU associated with a device. The IMU data can be used to determine a propagated state associated with a state estimation engine, wherein the propagated state includes an initial orientation estimate corresponding to a pose of the device. The state estimation engine can comprise an Extended Kalman Filter (EKF). A predicted orientation measurement can be generated using a first machine learning network to process the IMU data and the initial orientation estimate included in the propagated state associated with the state estimation engine. An updated state associated with the state estimation engine can be determined based on using the predicted orientation measurement to update the propagated state. A device pose estimate can be determined based on the updated state associated with the state estimation engine.

The invention relates to the technical field of measurement, in particular to a high-precision gyroscope orientation measurement method, which comprises the steps of out-hole known edge gyroscope orientation measurement, in-hole orientation edge gyroscope orientation measurement, orientation edge gyroscope coordinate azimuth angle calculation and gyroscope orientation orientation precision evaluation. An existing gyroscope orientation measurement method is low in measurement precision and poor in applicability, and the high-precision gyroscope orientation measurement method provided by the invention is high in measurement precision and high in applicability.

A calibration assembly for a guided vehicle. The calibration assembly includes an orientation marker that operably engages with a first guidance apparatus of the guided vehicle. The calibration assembly also includes an imaging assembly that operably engages with and is in electrical communication with a second guidance apparatus of the guided vehicle. When the imaging assembly captures the orientation marker at a translated position for at least one cycle, the imaging assembly calibrates a rotational displacement between a first guidance direction of the first guidance apparatus and a second guidance direction of the second guidance apparatus based on an angular displacement of the orientation marker measured between a zeroed position denoting the first guidance direction and the translated position.

Systems and methods for determining the impact of air resistance on the power being produced by a body motion are disclosed. In one aspect, a method includes measuring positions and orientations of a portion of the body in motion. The method further includes measuring pressure experienced by the portion of the body in motion. The motion further includes calculating a static pressure based on the measured pressures and correlated position and orientation measurements. The method further includes calculating a maximum pressure and calculating an air induced power exerted on the body in motion.

According to an aspect, there is provided a method of determining a location of a device on a surface of a body part of a subject that is treated by the device during a treatment operation. The device is for performing the treatment operation on the body part, and the device comprises one or more orientation sensors for measuring the orientation of the device in a reference frame of the device. The method comprises obtaining a three dimensional, 3D, representation of the body part, the 3D representation comprising normal vectors for respective positions on the surface of the body part; receiving a plurality of orientation measurements from the one or more orientation sensors representing orientation of the device during the treatment operation on the body part; processing the received orientation measurements to determine a sequence of orientations of the device during the treatment operation; and comparing the determined sequence of orientations of the device to the normal vectors and respective positions of the normal vectors to determine the location of the device on the surface of the body part during the treatment operation.

The invention provides a target position positioning device and method. In the device, a display unit is configured to be in a transparent mode and is located right in front of the eyes of an operator; when the to-be-rescued target is located in the center of the display unit, the marking assembly marks and confirms the to-be-rescued target and sends a distance measurement instruction to the head tracker; a head tracker is worn on the head of the operator, and when the head tracker receives a distance measurement instruction, the direction of a to-be-rescued target is determined based on the rotation direction of the head of the operator, the distance between the to-be-rescued target and the head tracker is measured, and the direction and the distance are sent to a signal processing unit; the signal processing unit determines the position of the to-be-rescued target according to the orientation and the distance sent by the head tracker, and sends the position of the to-be-rescued target to the display unit; the display unit displays the position of the to-be-rescued target and the area where the to-be-rescued target is located, and positioning and indicating of the position of the to-be-rescued target can be achieved on ocean ships, rescue airplanes, lifeboats and the like.

In one embodiment, an oral care system is disclosed that includes an oral care device and at least one programmable processor. The oral care device includes a head having a reference face, a light source, at least one orientation sensor generating orientation data corresponding to orientation measurements of the reference face during a freeform oral care routine, and at least one optical sensor generating optical sensor data representing optical feedback resulting from the light from the light source being incident upon sections of the oral cavity. The processor, based on the orientation data, determines which optical sensor data corresponds with which of the sections of the oral cavity. For each section of the oral cavity, based on the corresponding optical sensor data, the processor determines an oral care characteristic.

The present invention discloses a high-precision well inclination and azimuth measurement method based on a multi-axis sensor. The method includes: Step 1: Considering the influence of the earth curvature and the earth rotation, establish a local navigation coordinate system for the downhole environment to obtain a reconstructed signal; Step 2: Based on the sensor quality of the four-axis sensor, considering the influence of the Coriolis force caused by the earth rotation, calculate the Coriolis force compensation vector; Step 3: Calculate the projection of the geomagnetic field in the local navigation coordinate system to obtain the geomagnetic field projection vector; Step 4: According to the gravity compensation value, the Coriolis force compensation vector and the geomagnetic field projection vector, combined with the reconstructed signal, calculate the corrected well inclination angle and the corrected azimuth angle. The present invention significantly improves the accuracy of well inclination and azimuth measurement.

The invention discloses an intelligent door lock stress distribution monitoring and life prediction method based on a fiber grating, and relates to the technical field of distance, level and orientation measurement, and the method comprises the steps: obtaining baseline data, writing grating segment arrays with different chirp characteristics, dividing the positions of grating segments according to the baseline data, and adjusting the scanning bandwidth according to the initial spectral characteristics; after the scanning bandwidth is adjusted, frequency domain scanning is carried out on the single-mode optical fiber penetrating through the whole lock structure, and echo phase and amplitude data are collected to generate continuous strain distribution; and carrying out online calibration, and inputting the acquired data into the digital twinborn finite element model for parameter correction and life prediction. According to the scheme provided by the invention, a stress distribution diagram of submillimeter-level spatial resolution can be obtained in the lock body and on the surface of the lock body, and the stability and accuracy of long-term measurement are ensured by an online calibration mechanism.

The application discloses a multi-submersible cooperative positioning method based on distance and angle of arrival composite measurement, and relates to the field of underwater multi-submersible cooperative positioning. The application introduces direction measurement as a supplement on the basis of distance measurement, and based on composite measurement information, realizes distributed data fusion of each submersible under the premise of less communication energy consumption, alleviates the influence of factors such as cumulative error in inertial measurement of the submersible and underwater harsh environment on the positioning performance of the submersible, and achieves the purpose of improving the positioning precision of the submersible.

A measurement method for controlling the penetration error in long-distance tunnels according to the present invention, based on the control measurement of the ground control network and the control measurement of the tunnel control network, combines gyro orientation measurement to improve the measurement accuracy of azimuth angles, etc., and extends the ground control network to the underground through borehole plumb point connection measurement, so that the accuracy of the measurement results meets the requirements, directly guides the construction, effectively controls the lateral penetration error of the tunnel, adopts ground borehole plumb point connection measurement at the shallow buried layer position close to the penetration surface in the long tunnel, and uses the underground gyro orientation measurement verification method to perform high-precision control point densification, ensuring the perfect penetration of the tunnel, ensuring the precise docking of the tunnel project, and precisely analyzing the measurement error.

The invention discloses a shaft connection triangle measuring method, which comprises the following steps of: 1) hanging three steel wires in a shaft, measuring coordinates of two steel wires on the ground according to control points and an azimuth angle of a connecting line of the two steel wires, and measuring the coordinates of the two steel wires in the shaft according to coordinates of projection points and the coordinate azimuth angle of the connecting line of the two steel wires under the shaft; determining starting coordinates and azimuth angles of the underground conductor; 2) connecting the most favorable shape of triangle orientation; (3) carrying out field measurement on the connection triangles; (4) carrying out relation triangle measurement interior work processing; and 5) estimating the orientation measurement precision of the relation triangle. Due to the adoption of the technical scheme, the method has the advantages of being high in adaptability and precision, can be widely applied to urban rail transit connection survey and hydraulic engineering large-scale shaft connection survey, can effectively reduce direction errors caused by plumbing errors, and is beneficial to improving the measurement precision of underground conductors; in the measuring process, checking can be carried out through more redundant observation, and measuring errors are reduced.

A method of measuring optical properties of a specimen includes generating illumination light at a plurality of illumination wavelengths and, for each of the plurality of illumination wavelengths, directing the illumination light to impinge on the specimen, collecting sample light passing through the specimen, and detecting the collected sample light using a polarization state analyzer to form a set of polarization channels. The method also includes receiving a calibration tensor, converting the set of polarization channels for each of the illumination wavelengths into Stokes parameter maps using the calibration tensor, denoising the Stokes parameter maps, and deconvolving the Stokes parameter maps to provide density, anisotropy, and orientation measurements of the specimen. The method can multiplex intrinsic density, anisotropy, and orientation measurements of the specimen and density, anisotropy, and orientation measurements of labeled fluorescent molecules.

The invention discloses an omnibearing high-precision three-dimensional measurement system and method, which can realize omnibearing measurement of a target object and is suitable for high-precision three-dimensional reconstruction of various objects with complex shapes. A to-be-measured target is placed on the rotary table, the three-dimensional camera is placed on the pitching cradle head, the pitching cradle head is installed on the lifting guide rail, and the motion platform carries out data acquisition on the to-be-measured target under multiple shooting view angles; the upper computer controls the rotary table to drive a to-be-measured target to rotate, and the lifting guide rail and the pitching holder drive the three-dimensional camera to lift and pitch; in the measurement process, the upper computer controls the three-dimensional camera to select an optimal measurement visual angle to measure a to-be-measured target according to a measurement strategy, a result with a poor measurement effect is measured repeatedly, and the measurement result is complemented; in the calibration process, the calibration plate is placed on the rotary table, the transverse error, the reflectivity error and the distance error of the three-dimensional camera are calibrated respectively, and measurement errors are eliminated.

This invention discloses a multi-technology combined measurement method for ultra-long undersea twin-tunnel railway tunnels and service tunnels, including GNSS measurement outside the tunnels, traverse measurement considering vertical deviation correction, coordinate transfer measurement from free stations in deep shafts, and combined measurement of free stations, intersecting double traverses, and gyro-orientation inside the tunnels. Where the undersea tunnels are relatively short at the connecting points of the cross tunnels, a denser stationing method is used for direction and distance transfer. Combined traverses are used inside the tunnels to enhance azimuth accuracy with gyro-orientation measurement. This invention leverages the advantages of GNSS and total stations, improving the efficiency of deep shaft measurement in long tunnels and enhancing the accuracy of coordinate transfer in deep shafts. Furthermore, the denser stationing method used inside the cross tunnels for direction and distance transfer, along with closed-loop networking between different cross tunnels, improves the reliability of tunnel plane control measurement accuracy and ensures complete consistency of the coordinate systems of the left and right tunnels and the service tunnel.

Systems and methods are disclosed for determining whether or not an apparatus, such as a mobile device, is being handled or otherwise used within a vehicle. The apparatus may comprise an accelerometer configured to measure acceleration and a gyroscope configured to measure orientation. The apparatus may determine an axis of gravity of the apparatus based on acceleration measurements made by the accelerometer over a period of time. The apparatus may also determine a rotation vector of the apparatus based on orientation measurements made by the gyroscope. Using the axis of gravity of the apparatus and the rotation vector of the apparatus, the apparatus may determine a rate of rotation of the apparatus perpendicular to the axis of gravity. If the rate of rotation of the apparatus perpendicular to the axis of gravity exceeds a threshold, the apparatus may determine that it is being handled or otherwise used within the vehicle.

Method for calibrating a terrestrial observation device (1) comprising a viewing member (3) defining a sight axis, a range finder (6) for determining a distance from a reference point being located on the sight axis, an orientation-measuring member (7) for measuring the orientation of the sight axis to determine a current orientation of the sight axis, a display unit (4) and an electronic processing unit (5). The method comprises the steps, commanded by the processing unit, of: displaying a mapping-image on the display unit, corresponding to a current position of the observation device; representing the current position and the sight axis from the current orientation on this mapping-image; having a user indicate, on the mapping-image, the reference point aimed at with the range-finder, and determining the position of the reference point indicated by the user on the mapping-image; and deducing from this, a correction parameter of the current orientation of the sight axis. Terrestrial observation device for implementing that method.

The invention discloses a man-made forest stand structure and function integrated monitoring system and method based on multi-source data fusion in the technical field of man-made forest monitoring, and the system comprises a movable ground monitoring box, one side of which is provided with a gap groove for accommodating single trees; the unmanned aerial vehicle is used for carrying out multi-view observation on a single tree crown; the two parking platforms are symmetrically distributed on the ground monitoring box, located on the two sides of the notch groove and used for allowing the unmanned aerial vehicle to take off and land, and the unmanned aerial vehicle takes off from one parking platform and flies around the single tree along a preset flight path in the vertical plane so as to collect stand structure data of the bottom, the top and the side of the crown of the single tree. According to the system, multi-source data acquisition is achieved through the unmanned aerial vehicle and the ground monitoring assembly, the parking platform and the ground monitoring assembly are driven to synchronously and accurately rotate through the orientation conversion mechanism, unmanned aerial vehicle multi-path canopy collection and ground circumferential all-dimensional measurement are achieved, and the integrity of canopy structure data and the three-dimensional reconstruction precision are remarkably improved.

According to one aspect, there is provided a personal care device (2) for performing a personal care procedure on a subject, the personal care device (2) configured to determine a position of the personal care device (2) on a body part of the subject. The personal care device (2) comprises: an orientation sensor (6) configured to measure a three-dimensional (3D) angular orientation of the personal care device (2) over time with respect to earth gravity and to output a corresponding orientation measurement signal; a surface displacement sensor (10) configured to measure a two-dimensional (2D) displacement of the personal care device (2) relative to a skin surface of the body part and output a corresponding surface displacement measurement signal; a processing unit (22) configured to determine a position of the personal care device (2) on the body part based on the orientation measurement signal, the surface displacement measurement signal, and a skin contact signal indicative of whether the personal care device (2) is in contact with a skin surface of the body part.

The utility model discloses a roadway tunneling laser orientation measurement control device, which belongs to the technical field of roadway tunneling and comprises a roadway top plate, and one end of the lower portion of the roadway top plate is connected with an adjustable support. According to the laser orientation instrument, the protection assembly is arranged, after the laser orientation instrument is used, a clamping rod is pulled towards the periphery of a cavity, the clamping rod moves to drive an external connection ring to move, the external connection ring moves to extrude a second spring, a movable cover is moved upwards along a fixed cover to be moved to be attached to the lower side wall of an end plate, an insertion block is inserted into an insertion groove, and then the clamping rod is loosened; a second spring loses the external force and restores to the original appearance, a clamping rod is driven to be movably inserted into a clamping groove, under the action of an end plate, a movable cover, a fixed cover and an external frame, the laser pointing instrument can be protected, and the situation that dust in the external environment adheres to the laser pointing instrument, and consequently the laser pointing instrument is polluted is avoided; and the subsequent use effect of the laser orientation instrument is influenced.