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sonaiko said:Guys,
I need an electronic device that can measure an angle, and a distance between 2 points.
I am thinking of device that is returning me maybe a voltage or even resistance value to indicate the angle or the distance.
Would please help me?
Thank you.
ericgibbs said:What angular resolution and at what distance [range]?
blueroomelectronics said:The Sharp IR Rangefinders some will return an analog voltage.
j.p.bill said:The optical rangefinders used in WWI & II used a fixed and moving mirror to get range. The angular motion of the moving mirror gave the tangent function, where the near side is known (the baseline of the rangefinder, or distance between mirrors. Good out to 25,000 yards or so. Needs a really good geartrain, though.
sonaiko said:I was kinda hoping to find sth much much more smaller resolution. in milli-meters.
thank you.
Leftyretro said:You state millimeters but not the minimum and maxium millimeter range. Could you state
0-xxx millimeter and then we might better help. What resolution (accuracy) are you looking for? What is the shortest distant you wish to be able to sense?
Very short ranges don't work well for time of flight type sensors.
Lefty
Oznog said:OK you're gonna have to drop the vaguarity and get straight to the details:
What is the application. That will say a lot of things- how fast, can you touch the target, is optical going to be applicable, etc.
How far off do you need to measure
How accurate do you need it to be
How advanced can this become- I mean a stereo camera and DSP system might do some neat things but probably a waste of time to discuss if you can't do anything like this.
It's probably worth mentioning that measuring distances is rarely a simple task. Ultrasonic works, a fairly advanced project though and is only applicable for large, flat targets at short to medium range, with a fairly limited accuracy. The optical parallax methods work but there's a lot of issues including getting the right hardware to do it, and the electronics may be relatively advanced.