Various possible leg movements for a healthy human leg.
During treatment after an accident, the patient is many times bedridden and may not be able to walk properly afterwards.
To facilitate walking in such conditions, a CONTINUOUS PASSIVE MOTION DEVICE (CPM) Device is used re-learn walking.
An equivalent human leg is designed to imitate correct functioning of human leg.
This equivalent leg contains three hinge joints at hip, knee and ankle.
The human walking pattern (GAIT) was studied, recorded and analysed using motion capturing camera (Qualisys Track Manager).
The data was converted into distance of the heel from the ground vs time format, and a CAM was developed to imitate the gait pattern.
The CAM was used in the initial models of the CPM device, which later was changed by a linear actuator.
Also, the leg support (the equivalent human leg) was made telescopic to accommodate different leg sizes.
A dual support system was incorporated in the design to provide proper assistance to the leg.
The hip block was given proper counter hip-thigh joint curve for comfortable usage.
A manikin depicting how to use the CPM device.
The final concept was tested for various parameters to provide structural validation.
The circuit diagram to show the working of the linear actuator.
A remote controller for using the prototype developed of the CPM device.
Various positions of the leg while using the developed prototype.
The working of the developed prototype of the CPM device.
