Vehicle Backup Detection
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From: Steve Pope on 19 May 2010 19:18 Eric Jacobsen <eric.jacobsen(a)ieee.org> wrote: >On 5/19/2010 2:01 PM, Vladimir Vassilevsky wrote: >> Connect to the rear lights. >I think a bunch of cameras on the roof pointed at the sky with a really >accurate celestial navigation scheme would work. How about pitot tubes? Steve
From: Eric Jacobsen on 19 May 2010 19:26 On 5/19/2010 4:18 PM, Steve Pope wrote: > Eric Jacobsen<eric.jacobsen(a)ieee.org> wrote: > >> On 5/19/2010 2:01 PM, Vladimir Vassilevsky wrote: > >>> Connect to the rear lights. > >> I think a bunch of cameras on the roof pointed at the sky with a really >> accurate celestial navigation scheme would work. > > How about pitot tubes? > > Steve If one put an anemometer and wind vane on the roof to compensate for wind then that might work, too. -- Eric Jacobsen Minister of Algorithms Abineau Communications http://www.abineau.com
From: Jerry Avins on 19 May 2010 21:04 On 5/19/2010 7:14 PM, Eric Jacobsen wrote: > On 5/19/2010 2:01 PM, Vladimir Vassilevsky wrote: >> >> >> arvkr wrote: >> >>> Hello All, >>> Looking for some advice on how to detect if a vehicle is backing up >>> (reversing) using measurements from a 3 axis accelerometer and compass. >> >> Forget about it. >> >>> also have accurate measurements of velocity from a wheel speed sensor. >> >> Connect to the rear lights. >> >> VLV > > I think a bunch of cameras on the roof pointed at the sky with a really > accurate celestial navigation scheme would work. Nah. That fails in a fog. Jerry -- "I view the progress of science as ... the slow erosion of the tendency to dichotomize." --Barbara Smuts, U. Mich. �����������������������������������������������������������������������
From: Tauno Voipio on 20 May 2010 02:34 On 19.5.10 11:44 , arvkr wrote: > Hello All, > Looking for some advice on how to detect if a vehicle is backing up > (reversing) using measurements from a 3 axis accelerometer and compass. I > also have accurate measurements of velocity from a wheel speed sensor. > Cheers > arvkr Get the contents of an optical mouse and point at ground. -- Tauno Voipio
From: arvkr on 20 May 2010 13:02
>Rune Allnor wrote: >> On 19 Mai, 22:44, "arvkr" <krarvind(a)n_o_s_p_a_m.gmail.com> wrote: >>> Hello All, >>> Looking for some advice on how to detect if a vehicle is backing up >>> (reversing) using measurements from a 3 axis accelerometer and compass. I >>> also have accurate measurements of velocity from a wheel speed sensor. >>> Cheers >>> arvkr >> >> You only need the wheel speed detector. Look at the sign of the speed: >> Positive speed is forward; negative speed is reverse. Or vice versa. > >Assuming that the wheel speed is signed, and not just a pulse train. > Unfortunately its just a pulse train. Can't use optical or other sensors. Acceleromter and Compass data is all i have apart from the pulse train wheel speed sensor output. |