help for choosing a sensor

[Cyrus the Great]

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?

 

[goldsmith]

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

 

[Cyrus the Great]

hi.could you tell me about accuracy of this sensor?

 

[goldsmith]

It depends on your design steps .
e.g the receiver circuit that you will use in , and the transmitter that you'll use in .
Respect
Goldsmith

---------- Post added at 02:08 ---------- Previous post was at 02:07 ----------

BTW : how much precision , do you need?

 

[Cyrus the Great]

mm or even nano.

 

[goldsmith]

hummm , i think you want high precise ( if you need nano meter ) thus i have no idea about nano meter distance measuring .
Wish you the best
Goldsmith

 

[Cyrus the Great]

Dear Goldsmith
tank you for your help and your attention.
Best wishes

 

[keith1200rs]

nanometre precision for a robot - you cannot be serious! Presumably you have a motion control system to match?!

There are come simple Sharp optical sensors which are commonly used for robotics and are regularly discussed on here.

Keith

 

[Tahmid]

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.

 

[demetal]

Hi,

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...

 

[Cyrus the Great]

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 ?