hucaby@mri.uky.edu (David Hucaby) (03/27/91)
I'm trying to build a home weather station and would like to find sources
for wind speed and wind direction sensors. I've seen complete (& expensive)
weather stations in various catalogs, but have never found just the
sensors by themselves.
Anybody got a good source or some ideas on how to build and calibrate
wind sensors?
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_________ David Hucaby University of Kentucky MRI Center
/ \ _ ____ HM103 Medical Center
/ / /_\ \ / /___ Lexington, Kentucky 40536-0084davet@tsdiag.ccur.com (Dave Tiller N2KAU) (03/28/91)
In article <1991Mar27.033853.14775@ms.uky.edu> hucaby@mri.uky.edu (David Hucaby) writes: >I'm trying to build a home weather station and would like to find sources >for wind speed and wind direction sensors... >Anybody got a good source or some ideas on how to build and calibrate >wind sensors? Try using a transparent plastic with opaque markings on it to represent speed and direction. The speed disk simply has regularly spaced tick marks along the edge so that an opto-interupter can count them as the disk rotates. The direction disk has 4-bit binary markings radially on the disk, so that 4 opto-interupters can tell each of 16 positions apart. Note that there is no mechanical drag associated with obtaining the data. An 8-spoke example of the direction wheel: 1 0 1 0 1 1 1 1 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 1 Notice that the codes are backwards on the left side of the wheel. You could use Gray codes, if you wanted to. Make sure that the marks cleanly merge into one another so you don't get bogus readings. Hope this helps... -- David E. Tiller davet@tsdiag.ccur.com | Concurrent Computer Corp. FAX: 201-870-5952 Ph: (201) 870-4119 (w) | 2 Crescent Place, M/S 117 UUCP: ucbvax!rutgers!petsd!tsdiag!davet | Oceanport NJ, 07757 ICBM: 40 16' 52" N 73 59' 00" W | N2KAU @ NN2Z
dmturne@PacBell.COM (Dave Turner) (03/30/91)
In article <1497@tsdiag.ccur.com> davet@tsdiag.ccur.com (Dave Tiller N2KAU) writes: >In article <1991Mar27.033853.14775@ms.uky.edu> hucaby@mri.uky.edu (David Hucaby) writes: >>I'm trying to build a home weather station and would like to find sources >>for wind speed and wind direction sensors... >>Anybody got a good source or some ideas on how to build and calibrate >>wind sensors? > Here are a few references: The Care and Feeding of Optoelectronics 73, January, 1983 p 62 (build a weathervane) Your Own Optoelectronic Anemometer 73, November, 1984 p 42 Solid-state Digital Barometer Modern Electronics, January, 1989 p 42 Smart Weather Monitor Modern Electronics, (in five parts) June though October, 1989 Note that Modern Electronics has just changed its name to Computer-Craft. -- Dave Turner 415/823-2001 {att,bellcore,sun,ames,decwrl}!pacbell!dmturne