Wearable joint motion measuring instrument

Abstract

A wearable joint motion measuring instrument belongs to the field of medical instruments and comprises a shoulder, an upper arm, a lower limb, a leg fixing bandage, a shoulder and a leg angle measuring device. The shoulder and leg angle measuring device comprises a hemispherical housing, a trackball, a spherical housing connecting block and a support bar. A ball shell connecting block is connectedwith a shoulder fixation bandage or a lower limb fixation bandage and is fixed on the shoulder joint or the hip joint; The trackball is in contact with an inner surface of the hemispherical housing and a trackball mounting platform, which is connected with an upper arm or leg fixing bandage through a support bar and is fixed on a hand or a thigh. The hemispherical shell of the shoulder and leg angle measuring device is connected with the shoulder and lower limb fixing bandage through a ball shell connecting block. When walking, the angle of motion of the shoulder or hip joint is obtained through the angle sensor in the trackball. At that same time, the invention can accurately measure the angle of the leg on three axes in the cartesian coordinate system with the hip joint as the travel coordinate system, and the angle of the shoulder joint movement in a certain range.

Description

technical field [0001] The invention belongs to the field of medical devices and provides a wearable joint motion measuring instrument. Background technique [0002] Human joint range of motion, also known as joint range of motion, is the arc of motion that joints pass through during motion. Rehabilitation takes the range of motion of human joints as an important index to evaluate the degree of joint injury and rehabilitation of patients. The commonly used clinical measuring tool is a universal protractor, which consists of a movable arm, a fixed arm and a dial with a pointer, and the two arms are parallel to the long axis of the limb at both ends of the joint. Although this method is simple to operate, it has a large error, and it is difficult to measure the complex rotation angle of the spherical joint such as the shoulder joint and the hip joint. The mainstream attitude detection systems on the market are relatively expensive, have insufficient measurement accuracy, and...

AI Technical Summary

Problems solved by technology

Although this method is simple to operate, the error is large, and it is difficult to measure the complex spatial rotation angle for spherical hinge joints such as shoulder joints and hip joints

The mainstream attitude detection systems on the market are relatively expensive, with insufficient measurement accuracy and weak anti-interference ability

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