PSN-L Email List Message
Subject: Re: Capacitive Detectors
From: Ben Bradley benbradley@...............
Date: Mon, 22 Jan 2007 14:34:48 -0500
> In a message dated 22/01/2007, gpayton880@....... writes:
> Chris, where may I find more information on the capacitive detectors,
This device which was recently discussed here uses a capacitive
This page has info on the IC connected to the capacitive sensor:
> please. And, what is "LVDT?"
It's a linear variable differential transformer, three coils wound
around a form with a magnetic core that moves within them. With proper
circuitry it gives a voltage proportional to the position of the core.
This page describes an LVDT:
I've also seen an LVDT designed and used in the LIGO project that
uses only the three coils, with the center coil mounted on the moving
member to replace the moving magnetic core. One advantage of this is
there is no (or much less) "pull" on the moving part by magnetic
induction from the excitation coil.
Public Seismic Network Mailing List (PSN-L)
[ Top ]
[ Back ]
[ Home Page ]