collision avoidance
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HI all: I have come up against a stumbling block with my robots. I have
found that the sensors I am using will not always pick up something like a
chair leg. Using the srf04, the sensor WILL pick up the chair leg, but only
when it is directly forward of the sensor. If the robot is 3 inches to the
right of the leg, the robot will drive right in between the legs of a chair.
This is not wanted of course. the GP series Ir sensors have the same problem.
The one option I foresee is expensive. Mount numerous devantech sensors on
the front of the robot. At $33 a pop this gets expensive. A 2nd option is to
have a movable sensor. This is messy and time consuming in the code of the
robot.
Many small Ir sensors are not entirely effective either. They will miss
detections also. On the plus side, they are much cheaper.
Is there any sensor system out there that is fairly cheap, and reliable?
For ten cents I can mount bumper switchs on the front and be 100% reliable,
but I wanted to avoid any mechanical means.
Thanks for any advice.
Very respectfully, your obedient servant.
Brig. Gen. Johnston Pettigrew
Admin@M...
WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
Kerry Barlow
p.o. box 21
kirkwood ny
13795
607-775-1575
found that the sensors I am using will not always pick up something like a
chair leg. Using the srf04, the sensor WILL pick up the chair leg, but only
when it is directly forward of the sensor. If the robot is 3 inches to the
right of the leg, the robot will drive right in between the legs of a chair.
This is not wanted of course. the GP series Ir sensors have the same problem.
The one option I foresee is expensive. Mount numerous devantech sensors on
the front of the robot. At $33 a pop this gets expensive. A 2nd option is to
have a movable sensor. This is messy and time consuming in the code of the
robot.
Many small Ir sensors are not entirely effective either. They will miss
detections also. On the plus side, they are much cheaper.
Is there any sensor system out there that is fairly cheap, and reliable?
For ten cents I can mount bumper switchs on the front and be 100% reliable,
but I wanted to avoid any mechanical means.
Thanks for any advice.
Very respectfully, your obedient servant.
Brig. Gen. Johnston Pettigrew
Admin@M...
WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
Kerry Barlow
p.o. box 21
kirkwood ny
13795
607-775-1575
Comments
>HI all: I have come up against a stumbling block with my robots. I have
>found that the sensors I am using will not always pick up something like a
>chair leg. Using the srf04, the sensor WILL pick up the chair leg, but only
>when it is directly forward of the sensor. If the robot is 3 inches to the
>right of the leg, the robot will drive right in between the legs of a chair.
>This is not wanted of course. the GP series Ir sensors have the same problem.
>The one option I foresee is expensive. Mount numerous devantech sensors on
>the front of the robot. At $33 a pop this gets expensive. A 2nd option is to
>have a movable sensor. This is messy and time consuming in the code of the
>robot.
>Many small Ir sensors are not entirely effective either. They will miss
>detections also. On the plus side, they are much cheaper.
>Is there any sensor system out there that is fairly cheap, and reliable?
>For ten cents I can mount bumper switchs on the front and be 100% reliable,
>but I wanted to avoid any mechanical means.
> Thanks for any advice.
>Very respectfully, your obedient servant.
>Brig. Gen. Johnston Pettigrew
Kerry -
Use the following as a basis for your own design of a rotatable sensor, either
I/R or sonar:
http://www.robotstore.com/catalog/display.asp?pid=217
Regards,
Bruce Bates
they have a larger field of view then the SRF04 so that in itself is an
advantage.
The rotating servo mount would have to help considerably.
-kerry
At 03:57 PM 2/4/04 -0500, you wrote:
>At 03:55 PM 2/4/04 -0500, Kerry Barlow wrote:
>>HI all: I have come up against a stumbling block with my robots. I have
>>found that the sensors I am using will not always pick up something like a
>>chair leg. Using the srf04, the sensor WILL pick up the chair leg, but only
>>when it is directly forward of the sensor. If the robot is 3 inches to the
>>right of the leg, the robot will drive right in between the legs of a chair.
>>This is not wanted of course. the GP series Ir sensors have the same problem.
>>The one option I foresee is expensive. Mount numerous devantech sensors on
>>the front of the robot. At $33 a pop this gets expensive. A 2nd option is to
>>have a movable sensor. This is messy and time consuming in the code of the
>>robot.
>>Many small Ir sensors are not entirely effective either. They will miss
>>detections also. On the plus side, they are much cheaper.
>>Is there any sensor system out there that is fairly cheap, and reliable?
>>For ten cents I can mount bumper switchs on the front and be 100% reliable,
>>but I wanted to avoid any mechanical means.
>> Thanks for any advice.
>>Very respectfully, your obedient servant.
>>Brig. Gen. Johnston Pettigrew
>
>Kerry -
>
>Use the following as a basis for your own design of a rotatable sensor,
either I/R or sonar:
> http://www.robotstore.com/catalog/display.asp?pid=217
>
>Regards,
>
>Bruce Bates
>
>
>
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Very respectfully, your obedient servant.
Brig. Gen. Johnston Pettigrew
Admin@M...
WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
Kerry Barlow
p.o. box 21
kirkwood ny
13795
607-775-1575