Thanks, very interesting website!!

Cheers,
Mario


At 19.03 2010.04.07, you wrote:
>Hi, I think an accelerometer with some kalman filtering would solve your
>problem. But a gyro would be useful to correct the drifts. It uses a 3 axis
>accelerometer + 2 axis gyro. The complete circuit is less than 60 dollars.
>
>Some time ago, I assembled this circuit from Tom Pycke, and it works
>perfectly with a dsPIC:
>
>http://tom.pycke.be/mav/71/kalman-filtering-of-imu-data
>http://tom.pycke.be/mav/92/kalman-demo-application
>
>-- 
>[]s Rafael.
>Linux User #56352
>
>
>
>
>On Wed, Apr 7, 2010 at 12:46 PM, Electron <electron2k4@infinito.it> wrote:
>
>>
>> Hello,
>> to detect absolute pitch and roll (for an offroad motorbike application,
>> subjected to powerful vibrations, bumps, etc..) what would be the minimum
>> requirements for the sensors? I plan to use a powerful PIC32 as the
>> computing device.
>>
>> Would a 2 or 3 axis digital compass (such as the HMC6352 or HMC5843)
>> suffice?
>>
>> If not, why? And how many axis (and aligned how) do I need for the
>> gyroscope
>> and accelerometer?
>>
>> It is my understanding that the gyroscope data (albeit it needs to be
>> absolute,
>> not relative as normal gyros provide) is used to subtract gravity from the
>> data coming from the accelerometers, which are the "true" sensors.
>>
>> Thank You!
>> Mario
>>
>> --
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>> http://mailman.mit.edu/mailman/listinfo/piclist
>>
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