>>23593055 (OP)
I think on the earliest mentioning was this early 90 MS history book
it say this :
■ Bio Sensor
The Bio Sensor was a system installed in some MS (Mobile Suits) such as the Z Gundam.
It was designed to respond to the pilot’s mental state, particularly the Newtype ability, allowing the machine’s performance to temporarily exceed its normal limits.
Although it appeared as if the mobile suit itself possessed willpower, this was actually due to the amplification of the pilot’s psycho-wave output through the Bio Sensor system.
This system made it possible to perform maneuvers and reactions beyond the capabilities of ordinary human pilots.
The technology surrounding the Bio Sensor was highly classified, and even within the Federation forces, its details were kept secret.
It is said that the development of this technology was related to the research into the Psycommu system, and that it represented one of the earliest attempts to integrate man-machine interface technologies that responded directly to human thought.