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It is mentioned here (Distance measurement using InfraRed sensor with ADC0804 & 8051 microcontroller (AT89C51) )that Exact distance of the object can be dispalyed into LCD, can you tell me exact means what is the resolution , is it less tahn 1 mm or 1cm or what.
My second question is that – what is the minimum distance IR led can sense because it is mentioned in your article that “The major drawback of IR based sensors is their capability of detecting short distances.” – does it mean that it start sensing after 10 cm or any thing like this .
Please reply
regards,
Uttam DuttaHi Uttam
IR sensors work with infrared light which cannot be seen by a naked human eye. Also deploying such sensors in distance measuring tasks which demand a good precision, is not a right thought. These sensors change their values just by variation in light pattern around them. So according to me IR sensors won't solve this issue. Try using something related to sound, like ultrasonic and all, they'll give good results
IR sensors are very much prone to sunlight. their perfomance deteriorates in sunlight.
they are mostly used in indoor applications
resolution i dont know that you have to check with the datasheet
You can choose the sensor for distance measurement based on your application i.e whether indoor or outdoor application and based on the distance.
If indoor you can use IR sensor and for short distance (upto 10cm) it will not be appropriate.
If you want measure in outdoor better you can choose ultrasonic sensor.
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