Juniper Publishers-Journal of Robotics Abstract Shear force is measured under a patient's hip when he is on an inclined bed. To do that, we need to develop an instrument. That means to find a sensor and because it is expected that the shear force is very weak the signal must be amplified so we have to design an amplify, certainly we need a read out unit to indicate the measurement. All these are given in detail in this paper. Through theoretical consideration for a simplified model, a functional relationship between the shear force and the inclined angle of the bed is also obtained. To make it clear the explanation of friction, shear force and shear stress is given in Appendix Editorial Patients occasionally required to be on an inclined bed for certain therapy. One easily understandable therapy is to help the blood circulation in the legs and feet. When a patient stays long in a horizontal bed, often will have a m...
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