Thermal Sensor and Load Sensor

[bamcknig at postoffice.syspac.com]

Jjustin

I believe in the early 60s the phase detection system was 
commercially produced  If my memory is correct, It was like two 3(?) 
phase alternators at the ends of a drive shaft.  I don;'t remeber how 
they determined the phase relationship.  They could have just hooked 
them in series with an appropriate load and measured the voltage.  In 
anmy event we went with a shaft that had strain gauges mounted to it. 
 This was OK in the lab, but in the real world it didn't work.  Too 
many variables and no cheap Single Board Computers.

Bob McKnight
Phoenix AZ