Go to Post It’s possible to make friends without agreeing on everything. - Bill Gold [more]
Home
Go Back   Chief Delphi > Technical > Electrical
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
 
 
Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #8   Spotlight this post!  
Unread 06-04-2005, 10:16
nobtiba nobtiba is offline
Registered User
no team
 
Join Date: Aug 2004
Location: VIETNAM
Posts: 14
nobtiba is an unknown quantity at this point
Re: How to measure low velocity

I'm using ADC 10bit of ATMEGA8535. The resolution is 1lsb = 1/1023 corresponding to (1/1023)*5 V = 0.0049V. ADXRS150's sensitivity is 12.5 mV/deg/s so 0.0049V means 0.0049/0.0125=0.392 deg/s =141.12 deg/hour.
That's means if gyro can measure all angular rate from -150 deg/s to +150 deg/s , my ADC can detect the rate at 141.12 deg/hour.
But when I rotate the table faster than that (It takes only about 5 minutes/cycle) the value I get is constant: 480. That is the value at zero point. It shows that ADXRS150 can't detect this slow rate. How to do with this prob?
 


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Do defensive, low scoring tactics work? haverfordfords Rules/Strategy 37 18-02-2005 12:25
Rotating the motor cage to lock in LOW sanddrag Motors 3 10-03-2004 07:23
How to measure execution time? And code size? gnormhurst Programming 17 17-02-2004 08:06
Bug: Login Problems - Session timeout value too low? DanL CD Forum Support 4 09-01-2004 16:33
Tape measure proboscus tito General Forum 24 29-04-2002 15:56


All times are GMT -5. The time now is 19:04.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi