36 results about "Motion tracking system" patented technology

Embodiments of a balance device can include one, two or three of a medial-lateral curved track assembly, an anterior-posterior curved track assembly and a linear slide assembly. The balance device can be employed as part of a system further including, a camera-based motion tracking system communicably coupled to the balance device and a visual subsystem communicably coupled to the motion tracking system and operable to manipulate visual feedback to the user during operation of the balance device. Embodiments of a method according to the present disclosure include receiving measurements of a plurality of forces and a plurality of moments acting on a balance platform of a balance device, estimating a plurality of non-user force measurements and a plurality of non-user moment measurements caused by gravity and inertial accelerations, determining a compensation adjustment and implementing the compensation adjustment to the balance platform.

Disclosed embodiments provide systems and methods for training participants in simulation of firearm discharge and training of armed forces, law enforcement personnel, or the like. A motion tracking system tracks motion of one or more training participants. A wireless independent tracking system (WITS) device is coupled firmly to a simulated weapon in a virtual reality (VR) training environment.

Automated systems and methods are presented for determining the physiological response of human or suitable animal subjects to physical exertion. The methods and systems can include monitoring sensors that capture the motion of the subject along with corresponding physiological data, and can track such motion for the duration of a period of physical exertion. The system is able to acquire an initial stream of physiological data from the subject during a range of physical exertion activities that are representative of the events intended to be monitored with the proposed method and system, enabling a corresponding dynamic physiological response model to be created. The motion tracking system and physiological response model can then be used to predict the physiological response to physical exertion events under a prescribed framework, including applications during real-time event monitoring.

A geofencing system for a surgical handpiece with a cutting surface, including: a motion tracking system configured to track a location of the surgical handpiece; and an event detector configured to: receive a current measurement signal indicating a current usage of the surgical handpiece; receive motion information regarding the surgical handpiece from the motion tracking system; determine if the cutting surface has exited a second surface of a bone opposite a first surface where the cutting surface entered the bone based upon the current measurement signal and the motion information; and stop the surgical handpiece when it is determined that the cutting surface has exited the second surface of the bone.

Methods and systems for performing computer-assisted surgery, including robot-assisted image-guided surgery. Embodiments include marker devices for an image guided surgery system, marker systems and arrays for tracking a robotic arm using a motion tracking system, and image guided surgery methods and systems using optical sensors.

A staging system has to be calibrated to determine a location of a horizontal pivot axis of a target frame. A stage calibration light beam is generated and reflected from a target frame mirror. The target frame is pivoted between first and second positions and the locations of the stage calibration light beam are detected. The locations of the stage calibration light beam provide a value representing an orientation of the target frame mirror relative to the horizontal pivot axis. The orientation of the target frame mirror is then adjusted based on the value so that the target frame mirror is more normal to the horizontal pivot axis.

The utility model provides a kind of semiconductor equipment that can track wafer motion trajectory in real time, including transmission cavity, transfer cavity, process cavity and wafer motion tracking system;Mechanical arm for transmitting wafer is provided in transmission cavity;Transfer cavity and process cavity are connected with the side of transmission cavity;Wafer motion tracking system includes industrial camera, horizontal rotation mechanism for driving industrial camera to rotate in horizontal plane and vertical rotation mechanism for driving industrial camera to rotate in vertical plane;Horizontal rotation mechanism includes horizontal rotation motor, horizontal drive gear, horizontal rotation gear and thrust bearing, horizontal rotation motor is connected with horizontal drive gear, horizontal rotation gear is horizontally arranged on the top cover of transmission cavity with horizontal drive gear and the both interlock, thrust bearing is fixedly connected with horizontal rotation gear;Vertical rotation mechanism is connected with the horizontal rotation gear of the horizontal rotation mechanism and with industrial camera. The present application helps to improve production yield.

A method for allowing or disallowing control of a motion tracking system by means of voice, comprising: digitally processing sound detected by each microphone of the at least one microphone; digitally computing SNR by computing both first energy of a voice signal in the detected sound and second energy of noise in the detected sound; digitally processing electromagnetic waves captured by each antenna of the at least one antenna so as to detect data packets transmitted to the computing apparatus by each sensor of the plurality of sensors, each data packet including RSSI of a respective sensor; digitally computing distance between each sensor and the computing apparatus based on the RSSI of the data packets received from the respective sensor; digitally computing a percentage of sensors of the plurality of sensors having at least one of: a distance exceeding a predetermined maximum distance threshold, and a change in distance exceeding a predetermined maximum changing distance threshold; and digitally setting allowance or disallowance of voice control based on both the SNR computed and the percentage of sensors computed.

A molecular imaging system for imaging of an awake and freely moving small animal includes a cuboid animal cage for one or more small animals and an enclosure for receiving the animal cage. The cuboid animal cage and the enclosure are transparent to the radiation emitted by the animal. At least part of the animal cage is transparent to light. A detector assembly including multiple molecular imaging detectors immediately surrounds the enclosure for detecting radiation emitted by the small animal. The molecular imaging detectors and the enclosure cover at least three sides of the cuboid animal cage in a U-shaped manner. A motion tracking system for optical tracking of position and orientation of the animal with optical detectors synchronizes movement and molecular images. A computation unit processes data registered by the detector assembly and the motion tracking system.

The invention discloses a medical bed motion tracking system and method based on trinocular vision. The system adopts a non-equidistant compact three-camera layout, the left and middle base line is about 30cm, the left and right base lines are about 40cm, and all-angle dead-angle-free medical bed pose capture is realized by matching with medical spherical reflective mark points. Aiming at the shielding problem in a clinical environment, a dual anti-shielding strategy is adopted, trinocular redundancy characteristics are physically utilized, and binocular tracking is automatically switched when a monocular is shielded; a marker ball template is introduced in algorithm to match and repair damaged features. In a stereo matching link, an epipolar line and antipolar line dual verification mechanism is provided for a one-to-many mismatching problem, mismatching is eliminated through bidirectional projection consistency, uniqueness and accuracy of a matched triple are ensured, and high-precision three-dimensional reconstruction and pose tracking are further realized.

A motion tracking system for a robotic exoskeleton includes a computer device configured that is to: control a camera to capture the robotic exoskeleton when the robotic exoskeleton moves to obtain a plurality of images; for each image of the images, detect at least one of the two-dimensional markers in the image, obtain the position information and the appearance information contained in the at least one of the two-dimensional markers, determine an identity of the detected at least one of the two-dimensional markers based on the obtained appearance information, and obtain, based on the obtained position information, corresponding three-dimensional position and three-dimensional orientation; and output, by the computer device, the identity, the three-dimensional position and the three-dimensional orientation of the at least one of the two-dimensional markers as a tracking result of the robotic exoskeleton.

Systems and methods described herein relate to computer vision-driven full-body motion tracking using a portable computing device. The portable computing device has a first image sensor and a second image sensor to capture images of a full body of the user while the user is performing exercises. The images are captured while the portable computing device is positioned in a substantially vertical orientation. The images are processed to generate high dynamic range (HDR) image data and to determine depth information associated with the user. Motion tracking data is generated in real time, using the HRD image data and the depth information, while the user is performing an exercise. Real-time interactive feedback may be provided during exercises.

A method and system is for tracking motion of a wind turbine blade. A blade motion tracking system is for installation on a wind turbine blade with a blade root and tip. The system has at least one light module with at least a first light source, preferably adapted to emit light in the blade root direction. An optical measuring device at the blade root may receive light emitted from the first source. The optical measuring device may be a position sensitive detector identifying the first light source position relative to the position sensitive detector. A single light source located at, close to, or towards the tip, is sufficient to measure blade deflection. The first light source is modulated with a predefined frequency such that light from the first light source can be distinguished from ambient light and thereby minimize the influence of the ambient light conditions during detection.

The application discloses an ultrasonic image and pose data synchronous acquisition method and device, equipment, medium and product, relates to the ultrasonic image positioning field, and the device comprises an acquisition system host, a pulse generator, a positioning unit and an ultrasonic machine; the pulse generator simultaneously sends a synchronization pulse signal to the positioning unit and the acquisition system host; the ultrasonic probe acquires ultrasonic images; the positioning unit comprises a sensor and an electromagnetic signal generator; the sensor is arranged on the ultrasonic probe; the electromagnetic signal generator sends electromagnetic waves to the sensor and receives echo signals of the electromagnetic waves; the positioning unit is based on a motion tracking system, and the real-time pose data of the ultrasonic probe in the moving process is positioned according to the echo signals; the acquisition system host records the kernel time stamp of the synchronization pulse signal, synchronously acquires the ultrasonic images output by the ultrasonic probe and the pose signals output by the positioning unit, the application can accurately acquire the pose change in the moving process of the probe, and synchronously acquires the ultrasonic images and the pose signals.

Methods and systems for tracking movement of a person, includes: arranging sensors of a motion tracking system on a person; tracking movement with the sensors at least while the person performs a movement; digitally estimating, with a computing device, a position of the first joint or the sensor on the second body member, wherein the position of the first joint is estimated using measurements of the first sensor and its position is estimated using measurements of the first sensor and the sensor arranged on the second body member. The position is estimated while the movement is tracked. The method further includes digitally computing, an acceleration of the estimated position while movement is tracked; digitally computing a first comparison between the computed acceleration of the estimated position and acceleration measurements of the sensor arranged on the second body member; and digitally determining the movement performed based on the first comparison.

The present invention discloses a human eye movement tracking system and method. The system includes: a first camera for capturing a first facial image of a user; a second camera for capturing a screen image of a display screen, which is configured to display a customized stimulus image; an infrared illuminator for emitting infrared light toward the user's eyeballs; a signal processing unit for sending an instruction to the display screen to display the stimulus image, and determining the user's initial line of sight based on the first facial image, the stimulus image, and the position of the infrared illuminator; setting a camera located in the direction of the first line of sight as an auxiliary camera, and using the auxiliary camera to capture a second facial image of the user; and splicing a target eye image of the user based on the first and second facial images. The target line of sight direction is then determined based on the target eye image and the screen image. Application of the embodiments of the present invention can improve the accuracy of the determined user's line of sight.

A system for processing video of a sporting activity is disclosed. The system comprises: a plurality of portable electronic devices, each of which comprises at least one camera for capturing video of the sporting activity; and one or more aggregated data processing devices. Each portable electronic device is configured to: generate, using its camera(s), video data representative of the sporting activity; perform processing of the video data to generate video analysis data; and transfer the video analysis data to the aggregated data processing device(s). The aggregated data processing device(s) are configured to perform processing of the video analysis data, so as to generate activity analysis data. Apparatus for holding a portable electronic device is also disclosed, which comprises a housing, within which the portable electronic device can be mounted and enclosed, and an active cooling system for cooling the portable electronic device.

A geofencing system for a surgical handpiece with a cutting surface, including: a motion tracking system configured to track a location of the surgical handpiece; and an event detector configured to: receive a current measurement signal indicating a current usage of the surgical handpiece; receive motion information regarding the surgical handpiece from the motion tracking system; determine if the cutting surface has exited a second surface of a bone opposite a first surface where the cutting surface entered the bone based upon the current measurement signal and the motion information; and stop the surgical handpiece when it is determined that the cutting surface has exited the second surface of the bone.

A geofencing system for a surgical handpiece with a cutting surface, including: a motion tracking system configured to track a location of the surgical handpiece; and an event detector configured to: receive a current measurement signal indicating a current usage of the surgical handpiece; receive motion information regarding the surgical handpiece from the motion tracking system; determine if the cutting surface has exited a second surface of a bone opposite a first surface where the cutting surface entered the bone based upon the current measurement signal and the motion information; and stop the surgical handpiece when it is determined that the cutting surface has exited the second surface of the bone.

This invention relates to the field of image processing technology, specifically disclosing a real-time spinal motion tracking system and method. The system includes: a vertebral registration module for registering images of a target vertebra with preoperative images; a camera module for acquiring depth and visible light images of the registered target vertebra during surgery, and reconstructing a three-dimensional surface point cloud of the target vertebra based on the depth image; a feature point recognition module for performing two-dimensional feature point recognition on the visible light image acquired by the camera module to obtain three-dimensional associated points in the three-dimensional surface point cloud of the target vertebra during surgery; an optical flow tracking module for setting position templates for the two-dimensional feature points and their corresponding three-dimensional associated points, and performing optical flow tracking between the current frame image acquired by the camera module and the previous frame image; and a motion tracking module for calculating the motion amplitude of the target vertebra based on the optical flow tracking. This invention can directly perform real-time motion tracking of the target vertebra itself, reducing computational complexity and ensuring the real-time performance of the algorithm. Low computational complexity ensures real-time algorithm performance.

The invention belongs to the technical field of signal representation and classification, and discloses a gesture motion tracking system and method based on surface muscle electricity. The system comprises a data acquisition module used for acquiring an sEMG vector; the pre-filling module is used for constructing an sEMG matrix I containing an sEMG vector; the generative enhancement module is used for receiving the sEMG matrix I and then enhancing the sEMG matrix I into an independent gesture representation graph; the cross-crowd adjustment module is used for decomposing the myoelectricity panoramic representation image into a corresponding number of function partition mask images; the generative enhancement module and the cross-crowd adjustment module both need to be pre-trained; the generative enhancement module and the cross-crowd adjustment module both need to be pre-trained, the judgment module is used for judging whether the cross-crowd adjustment module needs to be calibrated or not, and finger-muscle relationships are determined in different modes; the method is used for determining the biokinematics relation between the muscle and the finger of the subject, the deployment cost is reduced, richer muscle information is obtained, and the accuracy of gesture motion tracking is improved.

A motion tracking system for validating an athlete's movement technique to determine an accurate competitive scoring with a nine-axis inertial measurement unit comprises: a three axis accelerometer, a three axis-gyroscope, a three axis-magnetometer and at least one sensor.

The invention relates to the technical field of medical information monitoring, in particular to a lung tumor motion trail tracking system in radiotherapy, which comprises a body surface information acquisition unit, an in-vivo information acquisition unit and a dynamic space-time fusion network, and is characterized in that the body surface information acquisition unit is used for acquiring body surface time sequence information of a patient and body surface space motion information of the patient; the in-vivo information acquisition unit is used for acquiring tumor motion information in the body of a patient, and the dynamic space-time fusion network model is used for fusing a body surface time sequence and body surface space motion information of the patient and establishing a mapping relation between the fused information and the tumor motion information in the body of the patient to form a tumor trajectory tracking model; the motion information acquisition module is used for acquiring tumor motion information in the body of the patient according to the body surface time sequence information and the body surface space motion information of the patient which are acquired in real time. The method has the beneficial effects that through accurate dynamic tracking and dose-level real-time feedback, the dose coverage of a tumor target region can be maximized, and meanwhile, the damage to surrounding normal tissues is minimized.

This invention discloses a system and method for tracking the three-dimensional motion of linear rigid bodies based on edge computing. The method comprises: a detection phase, acquiring feature information containing the number of linear rigid bodies and their rotational fulcrums from video stream data; and a tracking phase, utilizing this feature information to detect linear rigid bodies in specific areas and obtain their rotation angles in three-dimensional space, thereby completing the motion tracking of the linear rigid bodies in three-dimensional space. The invention utilizes computer vision technology and requires only the addition of a monocular camera and an inertial sensor, enabling real-time motion tracking of linear rigid bodies in three dimensions in conjunction with an edge processor.

Disclosed embodiments provide systems and methods for simulation of firearm discharge and training of armed forces and / or law enforcement personnel. A motion tracking system tracks motion of one or more users. In embodiments, the users wear one or more sensors on their bodies to allow tracking by the motion tracking system. A scenario management system utilizes position, orientation, and motion information provided by the motion tracking system to evaluate user performance during a scenario. A weapon simulator includes sensors that indicate position of the weapon and / or orientation of the weapon. The weapon simulator may further provide trigger activation indications to the scenario management system. In embodiments, the scenario management system generates, plays, reviews, and / or evaluates simulations. The evaluation can include scoring based on reaction times, posture, body position, body orientation, and / or other attributes.

Automated systems and methods are presented for determining the physiological response of human or suitable animal subjects to physical exertion. The methods and systems can include monitoring sensors that capture the motion of the subject along with corresponding physiological data, and can track such motion for the duration of a period of physical exertion. The system is able to acquire an initial stream of physiological data from the subject during a range of physical exertion activities that are representative of the events intended to be monitored with the proposed method and system, enabling a corresponding dynamic physiological response model to be created. The motion tracking system and physiological response model can then be used to predict the physiological response to physical exertion events under a prescribed framework, including applications during real-time event monitoring.

A method for adjusting operation of a motion tracking system includes a computing apparatus and sensors, each sensor having a gyroscope and an accelerometer. The method includes the steps of aligning the sensors; providing, each sensor to the computing apparatus, a first orientation when the sensors are aligned, the first orientation having a first heading; placing the sensors on a person; and providing, each sensor to the computing apparatus, a second orientation when the sensors are placed on the person, the second orientation having a second heading. The method further includes digitally determining, the computing apparatus, whether the sensors are placed on the person according to a predetermined sensor arrangement based on both the first and second headings of each sensor; and adjusting, the computing apparatus, the operation of the motion tracking system based on the determination. Also, a system for tracking motion of a person.

The invention provides a body surface respiratory movement tracking system and method based on a position sensing mark, which are used in the field of radiotherapy, and are characterized in that a visual mark generated based on a visual position sensing coding technology is arranged on clothes worn by a patient; detection and three-dimensional reconstruction of body surface marks are achieved through a binocular vision system to obtain body surface point clouds under respiratory movement, dimension reduction and fusion of body surface feature point clouds are achieved through PCA for the body surface point clouds at different moments, and body surface respiratory signals capable of being used for tumor movement tracking are extracted.