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PORTLAND, OR, United States

Patent
Apdm, Inc. | Date: 2014-01-02

Disclosed embodiments include an apparatus that comprises (a) a kinematics sensor module including an accelerometer, a gyroscope, a magnetometer, or combinations thereof; and (b) a bidirectional wireless communication module configured for wirelessly synchronizing the sampling time instances of the kinematics sensor module with the sampling time instances of at least a second wearable apparatus including a second kinematics sensor module.


Grant
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase I | Award Amount: 149.80K | Year: 2014

ABSTRACT: Interest in tracking human movement has been motivated by the wide array of its applications in health care, military training, sports, and entertainment. Currently, there is no single motion capture technology that is perfect for every possible use. The most common method of tracking movement is based on optical motion analysis systems. However, these systems are costly, not portable, and suffer from occlusion. Mechanical sensors can be cumbersome, hard to use, and are limited to orientation measurements. Magnetic motion capture systems provide accurate orientation and position, but have limited range, low sampling rates, and their use has to be restricted to areas where magnetic disturbances can be eliminated. Although inertial measurement units (IMUs) can overcome most of the limitations associated with other motion capture systems, orientation and position tracking relying on IMUs alone suffer from integration drifts over long periods of operation, making it difficult or impossible to track the absolute position of body movements. The objective of this project is to develop a new system that combines range and inertial sensors. The new system will utilize novel algorithms to fuse the range and inertial data to track human movement of individuals performing normal daily activities in natural environments. BENEFIT: Combined with the inertial data, range information that directly measures range between pairs of transceivers and our novel tracking algorithms, this new system will continuously estimate absolute and relative body segment positions and orientations with unprecedented precision during long-term monitoring.


Grant
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase II | Award Amount: 749.56K | Year: 2016

ABSTRACT:Analysis of human movement with motion capture systems is used in many applications in the domains of health care, military training and simulation, sports, and entertainment. The requirements of these applications have driven the development of new motion capture technologies to improve accuracy, automation, portability, and cost. There is no single motion capture technology that is well suited to all applications. Optical motion capture systems are extremely accurate, but are costly, time-consuming, sensitive to occlusions, non-portable, and are limited to indoor spaces. Magnetic motion capture systems provide accurate orientation and position, but have limited range, low sample rates, and are sensitive to magnetic field disturbances. Inertial motion capture systems can overcome some of these limitations, but cannot provide absolute position and are sensitive to magnetic field disturbances. In Phase I, we demonstrated the feasibility of an innovative approach that fuses ranging sensors with our inertial monitors to continuously estimate orientation and position. Our primary objective of this Phase II project is to use this technology to develop a complete motion capture system that can be used to track human full-body kinematics in a wide variety of research applications that are not well suited to other motion capture technologies.BENEFIT:The commercial Ruby system will be ready for research and development applications requiring biomechanics analysis. This will include both civilian and military applications for which current motion capture technologies are poorly suited due to their limitations. Ruby motion capture will be especially valuable in clinical and military research that requires portability, automation, or accuracy in environments with magnetic field disturbances.


Disclosed embodiments include a movement monitoring apparatus comprising a wireless synchronization scheme. Depending on the particular embodiment such wireless synchronization scheme is a master synchronization scheme or a mesh synchronization scheme. Additionally, in a particular embodiment, the movement monitor further comprises a robust wireless data transfer data controller. The disclosure includes a description of the complete system, namely, the wireless synchronized movement monitors with robust data transfer capabilities, the docking station, the access point, and the computer-implemented analysis system.


Disclosed embodiments include a movement monitoring system and apparatus for objective assessment of movement disorders of a subject, comprising (a) one or more movement monitors, and (b) a computer-implemented analysis system comprising one or more protocols and associated data analysis methods to objectively quantify movement disorders based on movement data acquired by the movement monitors. According to one embodiment, the movement monitors are robust wireless synchronized movement monitors and the protocols include one or more tests for assessment of neural control of balance.

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