The low cost Tape Sensor measures the Piezo motion!

posted Jun 14, 2013, 8:26 PM by Tiberius Brastaviceanu   [ updated Jun 15, 2013, 8:03 PM ]

 low cost tape sensor
 piezo driver and stack
 piezo stack

The low cost Tape Transducer was fixed along the piezo stack, which was activated using our new driver. The graph below shows the signal from the tape transducer driven by the piezo. We started with a sin wave and ended with a triangular wave. The entire measurement took 20 seconds. 

We tried higher frequencies, but above 3 Hz the kapton tape used to fabricate the tape transducer, which takes time to relax from its stretched state, doesn't follow anymore. 

We didn't measure the total displacement of the piezo, but it was driven at max voltage, which, if everything was OK, would give 50um motion amplitude. The only thing we can say with certainty is that the amplitude of the motion recorded with the help of the tape transducer was max 50 microns. 

Why is this so exciting? Because we could test something we built with another thing we also built!!!! 

In terms of our business strategy, you can now see how these different devices we build combine together into more complex systems. This is in fact the first expression of the touch-sensitive and self-"aware" robots for micromanipulation, combining an actuator and a displacement sensor.