Apparatus, method and system for measuring repetitive motion activity

摘要

Provided herein are systems and methods that use a video content analysis algorithm to measure and quantify repetitive motion activity of a designated body part, including velocity, acceleration, frequency, and duty cycle, without applying sensors or other instrumentation to the body, for the purpose of preventing repetitive motion injuries. In some embodiments, the video-based direct exposure assessment system uses marker-less video and a video content analysis algorithm. The video content analysis algorithm is able to recognize and identify the pattern of repetitive motion, through a process known as cyclic motion analysis. Determination of the cycle pattern provides parameters for determining a body part's activity level, and thereby allows determination of the body part's activity level.

主权项

1. A device comprising:
an input component configured to select a single or multiple regions of interest from an image of a subject's hands or arms or a background of the image of the subject's hands or arms, or a stationary region from a background; a processor component configured to identify and track spatiotemporal characteristics of at least one region of interest (ROI) on an image of the subject's hands or arms without application of sensors or other instrumentation to the subject's body,
wherein the processor, in operation, is configured to:identify motion of the ROI;perform cyclic motion analysis on the ROI;quantify kinematic properties of the ROI, said kinematic properties comprising velocity, acceleration, and spatiotemporal characteristics;ascertain a duty cycle of the subject's forceful hand exertions from threshold level crossings of the kinematic properties of the ROI and repetition frequency of a task being performed by the subject; and an output component configured to provide information from the processor about the repetitive motion and hand exertions of the subject comprising repetition frequency, duty cycle, and hand activity level (HAL) of the subject for preventing injuries due to repetitive motion or muscle fatigue.