Originally posted by Davor
View Post
Back in 1976 I had two ideas for metal detectors. I called Whites up and spoke to them about the possibility of them using the ideas.
They made the best detectors, and I had an idea. I still believe that they would not have stolen the ideas, but I wound up only discussing one with them
They sent me an NDA. in that NDA it essentially said, we can't tell
you what we are doing, but if it is the same as what you are revealing, then we can go ahead and do it without compensation.
A rough paraphrase.
Translated, we don't know what you have in mind, but if we are doing it already, we can continue to do it. But we won't tell you what we are doing. (leaving the door open for them to simply say
oh yes, we are already working on that idea, when they were not), and taking it and using it.
One idea was to use a micro processor to set discrimination parameters, and a digital meter to show responses. I had that mapped out and designed pretty carefully.
I never shared that idea.
The one I did, and I still think is a valid way of ground balance, was to provide a 3rd very small receiving coil, null balanced along with the main receiving coil, and using the signal from that
as a real time ground signal to remove the ground matrix from the main signal. That is, the theory being that the very small sample area (about an inch across) would almost all of the time, NOT have a target in it, and if it ever did, it would be very fleeting. BUT it would always be affected by the ground, this reading the ground and providing a signal that could be used to remove the ground effect.
I did discuss this with Whites.
I have long forgotten who I talked to, but not his words: "gaussian noise minus gaussian noise is gaussian noise".
Getting around the "not invented here" syndrome is very very very difficult.
Comment