Autonomous vehicle sensor system

Brian_csufresno

··This system was developed to·monitor the presence of objects and obstacles within a vehicles immediate environment (within a specified distance around the vehicle) as well as provide·vehicle motion·and orientation feedback.
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The objectives for the projects were as follows:

• The·system should detect the presence of obstacles in a specified area. This area has been determined for the vehicle on which the system will be put in use. See attachments.
• The system must detect the presence of these obstacles with minimal delay.
• The system should be able to provide feedback on the surfaces which the vehicle will travel on.
• The system must be able to detect vehicle’s movement and orientation
• The controller must be able to determine if the sensors are operating correctly.
• The controller must be able to notify the vehicles control system of any detected obstacles, important operational feedback or system failures.

A BS2P40 was chosen to control the system due to a large number of required i/o's. The system was designed using 8 devantech SRF08 modules in a ring configuration to detect obstacles around the vehicle.·The I2C protocol was used to·communicate·with the SRF08's reducing the number of required i/o's. ·A Hitachi HM55B compass module provides orientation feedback while the Memsic 2125 dual axis accellerometer is used to provide feedback of the vehicles movement. A simple set of infrared detectors are used to detect·the surface on which the vehicle is traveling so as to avoid stairways, curbs and other potentially harmful conditions.·The technical design of the system as well as the completed project·is shown in the attachments.



Post Edited (Brian_csufresno) : 2/8/2006 12:23:49 AM GMT

Jon Williams

Is this a completed project or are you looking for assistance? If the latter, I'll move the thread to the BASIC Stamps forum.

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Jon Williams
Applications Engineer, Parallax

Brian_csufresno

This is a completed project. My time was cut short when I was posting up the info on the project... Is there a way that I can edit the information that I posted? Or do I need to repost?

PJAllen

Log back in and then go back to your Post and click the Pencil button in the upper right corner of that Post (that is the Edit Button.)

Jon Williams

Cool, you can either edit your original post as PJ describes above, or simply add to this thread.

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Jon Williams
Applications Engineer, Parallax

Brian_csufresno

Gotcha... done and done. Thanks for the help.

Migs

I would like to see the schematic and the code, as well as some information about the motors. -Migs

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"Sometimes we forget that the world itself is paradise." Douglas Coupland, 'Microserfs'
"If the doors of perception were cleansed every thing would appear to man as it is, infinite" - William Blake
"We either make ourselves miserable, or we make ourselves strong. The amount of work is the same." Carlos Castaneda
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My website: www.intoku.net my e-mail:mreznicek@pretensa.com me:Miguel Reznicek

Scott Portocarrero

Sweet project! I was thinking of doing something like this on my autonomous Power Wheels. Do you have the program??? Maybe some more detailed drawings of the project?