Subject:
|
RE: Cheap air flow sensor
|
Newsgroups:
|
lugnet.robotics.handyboard
|
Date:
|
Tue, 16 Jun 1998 21:52:28 GMT
|
Original-From:
|
Paul Mrozowski <mrozowski@glis&saynotospam&.net>
|
Viewed:
|
1174 times
|
| |
|
|
At 07:41 AM 6/16/98 -0700, you wrote:
> The classic small air flow sensor is a hot-wire-anemometer. Just position a
> short piece of very fine wire in the airflow and normal to it, run a
> constant current thru it, and measure the voltage change due to the cooling
> effect of the airflow. Works great. Unfortunately, the sensing wire is
> ordinarily platinum (!) due to it's desireable resistivity/temperature
> characteristics and relative inertness, however, cheaper wire may work. It
> must be VERY fine wire, however.
Interesting. But wouldn't the air temperature change the readings? Or
would you also use a temp. sensor and adjust your table scaling to take
this into account? What about air pressure, same thing?
-Paul
|
|
1 Message in This Thread:
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
