Tendon Viscoelastic Properties

One of big parts in my Thesis.

This part is called tendon mechanical properties which means we need to calculate tendon stiffness and hysteresis. 

In order to measure the displacement and applied force of tendon, we use sonography and load cell. However, in my lab, sonography and load cell are two different system. We need to synchronize those two system, so I use a switch which can generate 5 volt to be a mark. Here is the animations.