Adjustable simulation knee joint gait data acquisition system and its method

Abstract

The invention relates to an adjustable simulated knee joint gait data collecting system and a method thereof. An adjustable simulated knee joint is combined with thin-film-type pressure sensors to collect and analyze gait data of a human body, and resistance-type angle sensors are adopted to truly collect the angle change of knee joints of the human body on a flat pavement and the complex road condition. By utilizing the adjustable simulated knee joint gait data collecting system, gait information under the various road conditions can be collected in real time, wherein the gait information includes the change of the angle and angular speed of knee joints, the change of the swing speed and the acceleration of thighs, the change of the swing speed and the acceleration of shanks and the stress change of toes and heels. Meanwhile, all the gait data can be wirelessly transmitted to a computer through a control box to be analyzed and processed subsequently. The adjustable simulated knee joint gait data collecting system is low in manufacturing cost, simple in using environment, high in technological operability and capable of being developed secondarily. A fixed three-dimensional force measuring platform is not adopted, measuring is flexible, measuring precision is high, the data are reliable, and variability does not exist.

Description

technical field [0001] The invention relates to a simulated knee joint, in particular to a simulated knee joint gait collection, analysis and recognition system and method thereof. Background technique [0002] Walking is the most basic movement of human beings. The walking posture can be divided into different types. By detecting the physical quantities related to biomechanics such as the movement state and force state of the human body during walking, various factors affecting gait can be further analyzed, such as anatomical Various changes in structure, physiological function and even mental state. To this end, certain technical means and equipment are needed, namely the gait analysis system. [0003] At present, there are mainly two types of gait analysis systems on the market. The first type of gait analysis system uses a 3D motion capture system and a 3D force plate to collect the precise 3D coordinates of each joint point of the human body during walking and the sole...

AI Technical Summary

Problems solved by technology

The three-dimensional force plate equipped with this type of equipment is only suitable for the simulation of flat road surfaces, but cannot measure complex road conditions (uphill, downhill, up stairs, down stairs), and the measurement range is limited

[0007] (3) The three-dimensional image motion capture system uses image technology to convert the reflective marker points attached to various parts of the human body into three-dimensional coordinate data, so the measured data may not always be reliable, and there is a certain degree of variability

[0012] (1) This type of gait analysis system is to install several angular velocity (gyroscope) and angular acceleration sensors on the test point of the subject through the belt, but in the process of walking, the belt will be pulled by the clothes , which in turn leads to misalignment of the relative positions of each sensor, which will eventually affect the measurement results

[0013] (2) Knee joint angle change is an important variable in gait analysis, but if this type of gait analysis is used for gait analysis, the knee joint angle change is obtained by integrating the angular velocity data of the angular velocity (gyroscope) , with the prolongation of the test time, the integral value will produce cumulative errors, and the test results will be seriously distorted, so the test time has a certain limit

[0014] To sum up, both types of gait analysis systems have different advantages and disadvantages. If any of the above two types of gait analysis systems are used, there are deficiencies in the gait characteristics of the knee joint.

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