DVRT Temperature compensation?
DVRT Temperature compensation?
(OP)
Has anyone else out there ever worked with a DVRT as a displacement sensor at high temperature? I am currently doing so, and have electronics that operate up to 175°C but there is drift, mostly due to the resistance change of the windings of the sensor. Does anyone have any ideas/techniques that they know of that would help in this situation?
Thanks!
Thanks!





RE: DVRT Temperature compensation?
RE: DVRT Temperature compensation?
RE: DVRT Temperature compensation?
The bridge approach is just one possible suggestion that springs to mind. It's an old school approach (not that I'm THAT old).
If the sensor is three terminal, then perhaps a ratio-based approach would be all that's required.
A modern uC approach would be to measure the temperature and use a look-up table to compensate.
RE: DVRT Temperature compensation?
http://www.microstrain.com/sdvrt.aspx
RE: DVRT Temperature compensation?
RE: DVRT Temperature compensation?
And if the sensor operates with an AC stimulus, then I don't immediately see why the 12VDC would be needed.
Have you consulted with the sensor OEM to see if they provide reference designs for the necessary electronics?
RE: DVRT Temperature compensation?
RE: DVRT Temperature compensation?
RE: DVRT Temperature compensation?
That's not how patents work. Patents (and even patent applications recently) are published for all the world to see. And they're supposed to provide complete information (although they're normally written in gibberish to very intentionally obfuscate).
www.USPTO.gov
RE: DVRT Temperature compensation?
The approach is probably based on a three-lead device and using a ratiometric measurement.