Alignment-free motion capture method of human limbs based on inertial sensors

Abstract

The invention discloses an alignment-free motion capture method of human limbs based on an inertial sensor, comprising the following steps: using a reference object to provide references for horizontal and azimuth postures; the human body is facing the reference object, and an IMU is stably placed on the reference object , so that the IMU coordinate system is consistent with the reference coordinate system; the attitude of the IMU relative to the geographic coordinate system is obtained by using the IMU output, and then the alignment between the reference coordinate system and the geographic coordinate system is realized; the arrow mark is set on the IMU shell, according to Marking Wear several IMUs on the corresponding positions of the limbs of the human body to achieve effective alignment between the IMU and the coordinate system of the limbs; to achieve the capture of the movement of the limbs of the human body. Through reasonable preparation and wearing scheme, the present invention can achieve alignment by avoiding the usual alignment actions, and then realize the motion capture of limbs. On the premise of ensuring accuracy, the alignment time is reduced, and it can be used in hemiplegia rehabilitation. And somatosensory games and other fields have great application value.

Description

technical field [0001] The invention belongs to the technical field of human body motion capture, and relates to an inertial sensor initial alignment technology for human body motion capture, in particular to an alignment-free human limb motion capture method based on an inertial sensor. Background technique [0002] Human motion capture technology has broad application prospects in medical diagnosis, sports rehabilitation, virtual reality, human-computer interaction, etc. [0003] At present, relatively mature human motion capture methods are infrared optical measurement methods based on multiple marker points, such as commercial products Vicon, Optitrack, etc., but their effective measurement range can only be limited to the experimental area where this system is installed, and the marker points should be based on the human body. The anatomical principle is worn at a specific position on the human body and is expensive; research on vision-based human motion capture systems...

AI Technical Summary

Problems solved by technology

For people with hemiplegia, as they may not be able to perform specific alignment movements

For ordinary users, it is also difficult to ensure the accuracy of the alignment action, and it is easy to lead to a long preparation time

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