hi.i need a sensor which can detect a distance. for example if i put something in front of it it can show the distance.and my another question is about the accuracy of this kind of sensor,is it cm or m or what?
Dear pesarirouni
Hi
You can design it simply ! With an ultrasonic transceiver .the receive and reflect , time can give you the distance simply .
I hope i understood , your exact meaning .
Best Lucks
Goldsmith
Are you sure you need nanometer precision. Maybe you're just talking about wanting as much precision as you want. But nanometer precision is not a usual requirement.
You need to tell us what you are going to use the sensor for, ie the exact application of the sensor.
You can use IR type sensors for a short distance detection... Its consists of two IR led's one acting as a transmitter and other as a receiver... It works by using the priciple of reflection... Use an adc with a lookup table (containing values based on manual measurements) can get you an accurate result...
as dear Tahmid said I want as much precision.i want to create something for balancing the surface in architectural usage.in this case i need high accuracy.so whats the maximum accuracy which can i have withe the sensor that you know ?