 | | Re: Navigation using landmarks (Was: Re: lasers and RCX)
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(...) tiny (...) suitable (...) What a good idea. Does anyone know how they work and where to get the chips? Peter (22 years ago, 29-Jun-02, to lugnet.robotics)
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| | Re: Navigation using landmarks (Was: Re: lasers and RCX)
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(...) Out of a mouse? Simon, expert at stating the obvious. (22 years ago, 29-Jun-02, to lugnet.robotics)
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| | Re: Navigation using landmarks (Was: Re: lasers and RCX)
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(...) <blush> (...) Well, where you get the chips is you pull apart a mouse these mice are pretty cheap these days. The software and control logic is all inside the mouse - they don't have any special drivers in the PC. Hence, the protocol is the (...) (22 years ago, 29-Jun-02, to lugnet.robotics)
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| | Re: Navigation using landmarks (Was: Re: lasers and RCX)
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(...) So, according to the Agilent Technologies web site, these sensors are tiny cameras that take 1,500 pictures per second (!) - they claim 400 'clicks' per inch at speeds up to 12 inches per second. That seems pretty good for a robot - there (...) (22 years ago, 30-Jun-02, to lugnet.robotics)
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| | Re: Navigation using landmarks (Was: Re: lasers and RCX)
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I'm certain that the optics need to be insanely close to the surface they are monitoring, causing a clearance problem. If such a device was hacked, would placing it in the center of a synchro or Killough platform prove useless in a spin? Rob (...) (...) (22 years ago, 30-Jun-02, to lugnet.robotics)
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| | Re: Navigation using landmarks (Was: Re: lasers and RCX)
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Just use the bottom half of the mouse, trimmed as much as possible, as a skid plate. It will need to be mounted to allow vertical movement, but it should work alright. This wouldn't solve the spin issue, but the clearance shouldn't be a problem. A (...) (22 years ago, 1-Jul-02, to lugnet.robotics)
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| | Re: Navigation using landmarks (Was: Re: lasers and RCX)
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(...) Yes - I was thinking of some kind of spring-loaded arm pressing the mouse's underside against the ground. (...) For a Killough platform, you have a fundamental problem. That type of drive has three degrees of freedom (well - it *ought* to have (...) (22 years ago, 9-Jul-02, to lugnet.robotics)
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| | Re: Navigation using landmarks (Was: Re: lasers and RCX)
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I see all this nice stuff about trimming mouse bottoms and mounting the device off of the central steering axis and stuff to try and catch rotation, but I haven't spotted the posting about how people are actually getting the x and y values from the (...) (22 years ago, 9-Jul-02, to lugnet.robotics)
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| | RE: Navigation using landmarks (Was: Re: lasers and RCX)
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(...) Nothing yet. I have a guy in England that's trying to use pbForth to do I2C comms. As I see it, there are two possiblilities here. One is a bit-bang interface on a sensor input port. Tricky to do with pbForth because it allows the normal 1 (...) (22 years ago, 9-Jul-02, to lugnet.robotics)
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| | Re: Navigation using landmarks (Was: Re: lasers and RCX)
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I was hoping, since the thread was already onto how to modify and mount the mouse guts, that it would have been preceeded by a successful attempt to interface the little beast. Since I already know quite a lot about how tedious it is to get data (...) (22 years ago, 9-Jul-02, to lugnet.robotics)
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| | Re: Navigation using landmarks (Was: Re: lasers and RCX)
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(...) I don't think anyone has actually *tried* this yet - but it's still worth discussing the *other* issues since we wouldn't want to go to the hassle of ripping apart mice until it's evident that it *could* work. The data stream from the mouse is (...) (22 years ago, 10-Jul-02, to lugnet.robotics)
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