Human body knee joint force moment testing system and method based on surface electromyogram signals, and application

Abstract

The invention relates to a human body knee joint force moment testing system and method based on surface electromyogram signals, and an application. The method comprises the following steps of step 1,collecting electromyogram signals of four muscles of vastus lateralis, semitendinosus, biceps femoris long head and gastrocnemius muscle of lower limbs of a user, and performing feature extraction; step 2, synchronously collecting leg kinematics data of the user in the walking process through a three-dimensional movement acquiring system, computing knee joint angles of the user, besides, synchronously collecting the insole pressure of feet of the user in the walking process through a force measuring treadmill, constructing a simplified dynamics model of legs of the user, and performing inverse dynamics solving to obtain the calculated force moment of knee joints of the user; and step 3, constructing a training dataset and a test dataset of a knee joint force moment testing long-term and short-term memory (LSTM) neural network, and completing the training of the knee joint force moment test neural network model through data obtained in the step 1 and the data obtained in the step 2. The method disclosed by the invention has the characteristics of being wide in application range and high in test precision.

Description

technical field [0001] The invention relates to the technical field of lower limb assist exoskeleton and biomechanical integration, in particular to a human knee joint torque testing system, method and application based on surface electromyography signals. Background technique [0002] At present, in the military field, due to the rapid marching of soldiers, the demand for different application scenarios such as combat rescue and ammunition transportation is becoming more and more intense, the active assisting exoskeleton of the lower limbs has become a way to enhance the strength and endurance of soldiers, improve the speed and range of movement, and reduce the physical fitness of soldiers themselves. It is an important equipment to reduce the consumption and reduce the damage of heavy-duty transportation, thereby increasing the combat capability. As the key basic technology for the torque control of the lower limb active assist exoskeleton and the evaluation of the assist ...

AI Technical Summary

Problems solved by technology

The isokinetic torque test method is a traditional human joint torque test method. It mainly tests the movement of the human body at a constant angular velocity of a single joint or a combination of multiple joints with the assistance of the isokinetic muscle strength test system. It is only applicable to the situation where the human body is in constant motion. , cannot be applied to the situation where the human body moves at any speed

Inverse dynamics to solve the human joint torque needs to collect the three-dimensional pressure of the plantar during human movement. The data collection needs to be collected on the three-dimensional force measuring treadmill in the laboratory environment. This method is difficult to generalize to any scene

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