Lower limb knee joint active muscle myoelectricity fitting method based on biodynamics

A knee joint and dynamics technology, applied in the field of bioelectrical signal processing, can solve problems such as instability of myoelectric components in sub-models of multi-fusion models, lack of physiological significance in sub-models, and unsatisfactory fitting results of muscle activation models.

Pending Publication Date: 2022-01-28
HANGZHOU DIANZI UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems such as the unsatisfactory fitting effect of most of the muscle activation models with physiological significance and the unstable electromyographic components of the sub-models of the multi-fusion model, which lead to the lack of physiological significance of the sub-models. Active EMG Fitting Method

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  • Lower limb knee joint active muscle myoelectricity fitting method based on biodynamics
  • Lower limb knee joint active muscle myoelectricity fitting method based on biodynamics
  • Lower limb knee joint active muscle myoelectricity fitting method based on biodynamics

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Embodiment Construction

[0067] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation plans and specific operating procedures are provided. The scope of protection of the present invention is not limited to the following examples.

[0068] Such as figure 1 , the embodiment of the inventive method mainly comprises the following steps

[0069] Step 1: Design the knee joint exercise experiment and collect data: Let the experimenter maintain a sitting balance first, then perform knee extension exercises, then return to the sitting balance state, then perform knee joint flexion movements, and finally return to the balance state again. After completing a cycle, let the subjects rest for 5 minutes to avoid muscle fatigue and affect the experimental results. figure 2 It is a schematic diagram of different motio...

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Abstract

The invention discloses a lower limb knee joint active muscle myoelectricity fitting method based on biodynamics. The method comprises the steps that intention-related myoelectricity is obtained through angle signals and a muscle fiber recruitment model; useful torque generated in the movement process is obtained through the height, the weight and the angle, and then muscle force related myoelectricity is obtained through an inverse hill muscle force model; the muscle length in the movement process is obtained through the initial resting muscle length and angle, and then muscle length related myoelectricity is obtained through a muscle shuttle feedback model; and finally, the three types of myoelectricity is fused by using strategies of configuring corresponding models at different motion stages and a least square search parameter method containing a loss function, and then the combination is fused with white noise to obtain final myoelectricity. The method has the characteristics of comprehensiveness, low error, good fitting effect, physiological significance, stable myoelectricity generated by the sub-model, conformity with the meaning of the sub-model and the like.

Description

technical field [0001] The invention belongs to the field of bioelectrical signal processing, and relates to a biodynamics-based myoelectric fitting method for active myoelectricity of knee joints of lower limbs. [0002] technical background [0003] There are more and more applications for wearable devices, one of which is neurorehabilitation, which aims to enhance the motor function of patients with nerve damage, such as stroke and spinal damage patients, using the arm to wear during the rehabilitation process Equipment or lower extremity rehabilitation equipment can help rehabilitation patients restore neuromuscular function. Now, more and more rehabilitation equipment have introduced the function of electrical stimulation feedback, and the function of electrical stimulation and tactile feedback depends on the establishment of muscle activation models of lower limb movement posture. During the rehabilitation process, the muscle activation model of the normal lower limb m...

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G16H20/30G16B5/00A61B5/00A61B5/389A61B5/397
CPCG16H20/30G16B5/00A61B5/389A61B5/397A61B5/7203
Inventor戴海烽张建海施强强胡帅黄时凯马润林
OwnerHANGZHOU DIANZI UNIV