Re: Gravity, Take 2
- For technical comments, please, here is my current sensor design. On
advice of a holographer friend, I've dropped the triangular pyramid
point support; he insists that I'll trouble with it. I trust his
The sensor will be in a Faraday enclosure for EM isolation (mï¿½-metal
would be interesting). It will use two identical piezo disks to
differentially sense vertical motion between two magnetically-coupled
Two additional magnetically-coupled piezo disks will support the outer
floating cylinder. These disks can be used two ways, I believe: they
can differentially sense vibration from the concrete pad that can be
scaled and removed from the floating sensors' data, or perhaps they
can be used to actively stabilize the floating sensors by canceling
vibration, using them as acuators.
John Locke <jlocke3000@...> wrote:I'm glad there are engineering types taking this seriously because they are doing things that I can not do.
- FYI: With a simple Michaelson Interferometer, a laser-based motion
Laser interferometry is an optical method of motion sensing that uses
a reflected beam to determine the change in distance between two
points, here a tiny 45-degree mirror and a glass bead (or a small
retroreflector). The resulting resolution is very good, on the order
of 100nm (0.000001mm); pretty sensitive.
I haven't yet determined if I can find affordable sufficiently-small
optical components but, lacking them, I'll revert to the piezos.