PSN-L Email List Message
Subject: RE: Infra-Sonic Atmospheric Air Pressure Sensor
From: "Gary Lindgren" gel@.................
Date: Tue, 30 Nov 2010 10:26:49 -0800
Chris,
Thank you for your thoughts and suggestions. I'm happy to see you back
online, we missed you.
Gary
From: psnlist-request@.............. [mailto:psnlist-request@...............
On Behalf Of Christopher Chapman
Sent: Tuesday, November 30, 2010 5:06 AM
To: el@.................. psnlist@..............
Subject: Re: Infra-Sonic Atmospheric Air Pressure Sensor
,
Subject: Infra-Sonic Atmospheric Air Pressure Sensor
http://sites.google.com/site/seismicsensorinfo/infra-sonic-atmospheric-air-p
ressure-sensor
The goal is to try to correlate atmospheric pressure
changes with vertical seismometer background noise.
Gary
Hi Gary,
There are three approaches to correcting for signals produced by
atmospheric pressure
changes. 1 enclose the seismometer in a hermetic chamber. 2 Measure the air
pressure changes and compensate using a digital correction signal 3 Fit a
compensation chamber to the other side of the seismometer hinge. This can
give perfect balancing and was used in1960-70 old type seismometers. Try
using Al drinks cans? It may be easy to set up and it is cheap!
Regards,
Chris Chapman
Gary Lindgren
585 Lincoln Ave
Palo Alto CA 94301
650-326-0655
www.blue-eagle-technologies.com
Check out Lastest Seismometer Reading
cymonsplace.blogspot.com
sites.google.com/site/seismicsensorinfo/Home
Design Details
for New Vertical Seismometer
=
Chris,
Thank you for your thoughts and suggestions. I'm happy to see you =
back online, we missed you.
Gary
From:=
=
psnlist-request@.............. [mailto:psnlist-request@............... =
On Behalf Of Christopher Chapman
Sent: Tuesday, =
November 30, 2010 5:06 AM
To: el@.................. =
psnlist@..............
Subject: Re: Infra-Sonic Atmospheric =
Air Pressure Sensor
<=
p class=3DMsoNormal>Gary
There are three approaches to =
correcting for signals produced by atmospheric =
pressure
changes. 1 =
enclose the seismometer in a hermetic chamber. 2 Measure the air =
pressure changes and compensate using a digital correction signal 3 Fit =
a compensation chamber to the other side of the seismometer hinge. This =
can give perfect balancing and was used in1960-70 old type seismometers. =
Try using Al drinks cans? It may be easy to set up and it is =
cheap!
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