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1/2Axis Magnetic Sensor HMC1001/1002 to make digital compass

 
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hbaocr



Joined: 13 May 2007
Posts: 243
Helped: 15
Location: Hochiminh City university of technology (VietNam)


Post18 Aug 2008 11:36   1/2Axis Magnetic Sensor HMC1001/1002 to make digital compass

hello;
I'm studying about navigation for UAV project! and I meet some problem about
How to make a digital compass from 1 and 2 Axis Magnetic Sensors HMC1001 and HMC1002.I don't understand how those sensors works!And the purpose of value output from those!
Do you explain to me the significance of the voltage value out output from that sensor!
How I can measure azimuth by using magnetic sensors

thank you very much!
I attach datasheet of it below!



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D_A_V_E



Joined: 13 Nov 2007
Posts: 52
Helped: 3


Post18 Aug 2008 13:02   1/2Axis Magnetic Sensor HMC1001/1002 to make digital compass

I thought there where some app notes on the honeywell site for this check that out
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Awarapunshee



Joined: 11 Jul 2007
Posts: 338
Helped: 45


Post18 Aug 2008 17:08   Re: 1/2Axis Magnetic Sensor HMC1001/1002 to make digital com

I think on page #12 & 13 applications and how to use is given. As far as I know use its differential voltage to measure.
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raka200



Joined: 02 Aug 2007
Posts: 42
Helped: 2


Post19 Aug 2008 10:51   Re: 1/2Axis Magnetic Sensor HMC1001/1002 to make digital com

Hi !!!
The output voltage is the projection of the surrounding magnetic field along the sensor axis.
The sensitivity of the sensor give you the relationship between the amplitude of the magnetic field and the output voltage. the ratio between the output voltage of the 2 axis gives you the angle (arctan).

There are additionnal pin to invert the axis (to eliminate internal offset / me effect), or to add an offset (eliminating calibrated disturbing thing, like earth magnetic field, or surrounding metallic object)

Hope it help you,

regards
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manish12



Joined: 21 Nov 2006
Posts: 955
Helped: 29


Post22 Aug 2008 18:23   Re: 1/2Axis Magnetic Sensor HMC1001/1002 to make digital com

use ADXL series chip .
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hbaocr



Joined: 13 May 2007
Posts: 243
Helped: 15
Location: Hochiminh City university of technology (VietNam)


Post23 Aug 2008 6:50   1/2Axis Magnetic Sensor HMC1001/1002 to make digital compass

hi,manish12
I'm using both ADXL ;gyro;and magnetic sensor to make IMU for UAV project! My problem is : how to use Magnetic Sensor HMC1001/1002 to indentify azimuth?
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mobile-it



Joined: 24 Apr 2004
Posts: 456
Helped: 12


Post27 Aug 2008 14:33   Re: 1/2Axis Magnetic Sensor HMC1001/1002 to make digital com

Maybe you can learn from the mikrokopter project.

we have build one of those here and he is working
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