Author Topic: how to know about sensor sensing distance  (Read 1398 times)

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Offline subhechhaTopic starter

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how to know about sensor sensing distance
« on: December 01, 2010, 09:49:01 AM »
suppose a sensor lets say of any kind but detecting obstracle ,then how can we know at from what range/distance an object is detected..?? also what type of sensor is suitable for obstracle detection such that the detection procedure would be quite faster....?? kindly specify the name and rating so that is would be easiler for me to get .....

Offline samurai7

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Re: how to know about sensor sensing distance
« Reply #1 on: December 01, 2010, 01:31:16 PM »
Hi,

Look into some range sensors. For example, check out Admin's intro to the Sharp IR Range Finder (http://www.societyofrobots.com/sensors_sharpirrange.shtml). This sensor returns analog output. You could use this output, coupled with a function of analog output versus distance to get an actual distance measured from the sensor (see http://www.societyofrobots.com/sensors_interpret.shtml). There are 2 issues with this kind of sensor: 1. It has a minimum sensor range. So if there is an obstruction within that range, your robot will think it is very far. 2. This sensor uses IR light, and so it can be affected by ambient light, especially outdoors.

Another option is to opt for ultrasonic (sonar) sensors. These utilize high-frequency sound rather than light, but are less accurate. They have a wider sweep, ensuring you detect an obstacle in your path.

Hope that helps,

Cheers

 


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