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    Re: Fluxgate compass /benefits of 3 axis
    From: Brian Whatcott
    Date: 2002 Jan 30, 2:13 PM

    At 11:03 AM 1/30/02, a contributor wrote:
    >Re the question of whether a fluxgate sensor may be bolted down or must be
    >gimballed-
    >...
    > >What is a strap-Down Fluxgate?
    > >
    > >They assert that a 3 axis flux gate compass must be held rigidly
    > horizontal (!)
    > >
    > >(KVH)
    > >
    >
    >My comment: I don't think that they are being amusing, but entirely serious.
    
    No doubt so - I was amused by their serious tone: I could suppose that the
    3 axis
    fluxgate will be a serious threat to their product.
    
    
    > >I expect this offering from
    > >Crossbow at San Jose will be the wave of the future:
    > >
    > >
    > >[sample text]
    > >The CXM544 sensor detects the Earth's magnetic field using a 3-axis
    > >magnetometer. The sensor computes a continuous measure of orientation using
    > >the 3-axis accelerometer as a gravitational reference field. The product
    > >uses the SoftSensor� architecture to compensate for temperature drift,
    > >alignment, and other errors. The CXM544 finds applications in old well
    > >logging, marine systems, and magnetic compassing. ...
    > >Download CXM544, Micro Orientation Sensor, Datasheet (PDF)
    >
    >A 3-axis accelerometer is a fancy sort of pendulum device.
    ...
    >George Huxtable.
    
    Let me write it again for your review:
         A 3 axis fluxgate of this kind computes
            "....a continuous measure of orientation."
    
    This means it can sense pitch, roll, and yaw, and process the magnetic input
    accordingly.   That's why it is the wave of the future!
    
    
    Brian Whatcott
       Altus OK                      Eureka!
    

       
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