long range sensing - Electronic Circuits Projects Diagrams Free

ahmedragia21 · 22nd December 2008, 06:42 PM

Hi, Im trying to sense if there is an object at 100m ? can infrared do it or ultrasound ??

ericgibbs · 22nd December 2008, 07:00 PM

Quote:

Originally Posted by ahmedragia21

Hi, Im trying to sense if there is an object at 100m ? can infrared do it or ultrasound ??

Whats the object, animal, mineral or vegetable.?

ahmedragia21 · 22nd December 2008, 07:03 PM

human or animal

blueroomelectronics · 22nd December 2008, 07:19 PM

How would it be focused?

ahmedragia21 · 22nd December 2008, 07:23 PM

just like that O -------------------X <-- object
i really wanna do it to detect a human passing near that sensor then do an alarm

blueroomelectronics · 22nd December 2008, 07:28 PM

A couple of meters maybe, but unless your sensor has a narrow field of view and decent aim 100m is pretty far.

ahmedragia21 · 22nd December 2008, 07:34 PM

yea im looking for a sensor like that ...

ahmedragia21 · 22nd December 2008, 07:53 PM

any ideas ?

Leftyretro · 22nd December 2008, 07:59 PM

Well some military have long range IR detection systems that have that kind of range but I'm sure it's not something easy or affordable.

Lefty

ahmedragia21 · 22nd December 2008, 11:00 PM

hmm, so i wont do it

?

Leftyretro · 23rd December 2008, 12:56 AM

Quote:

Originally Posted by ahmedragia21

hmm, so i wont do it

?

That's up to you. Me, I would just get a dog.

Lefty

ahmedragia21 · 23rd December 2008, 12:58 AM

hehe , really a nice soultion

, but would you help me to find an electric solution ?

dknguyen · 23rd December 2008, 01:08 AM

The only solution I've found for something like that (and believe me I've looked long and hard) that isn't more than $5K is the

Opti-Logic RS100 Industrial Laser Range Finder w/ RS232 Serial Computer Data Interface Ports w/ FREE UPS

and it's variations. It still costs $500 though. It's also not terribly accurate...1% of 100m is still 1m which makes it useless up close. It can only see large targets due it's field of view (don't expect to be able to light up a point like with a laser pointer and find out how far it is...that takes one of the $5000+ models).

100m is too far for ultrasonic or infrared. Pretty much only laser and radar will do it.

If you want to make a beam breaker though...that's easy. Just use a laser pointer and a sensor opposite of it. But you need something on both sides.

ahmedragia21 · 23rd December 2008, 01:12 AM

yea thanks ! i were about to show you the thread , i really wanted to hear your opinion ..
well how about this kit
<B>KIT1019</B><BR>Geophone, Seismic Kit - KIT1019
can it does the job ?
but i really dont know how long it can sense the vibrations of feet of a human ?

dknguyen · 23rd December 2008, 01:14 AM

It's cheap enough to experiment with. I would think cars on the road might interfere with it though. But I doubt it works more than a few meters (definately not 100m). There's just too much noise.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar
Title	Starter	Forum	Replies	Latest
need of long range IR transmiter	compass1982	Electronic Projects Design/Ideas/Reviews	66	15th February 2009 12:19 PM
Long range forecast	RobertRoss	General Electronics Chat	0	4th September 2008 03:58 AM
long range IR remote	Flyingmunkie	Electronic Projects Design/Ideas/Reviews	35	1st December 2006 01:05 PM
long range fm transmitter	dasappettan	Electronic Projects Design/Ideas/Reviews	13	30th August 2006 02:05 PM
Long range FM transmitter	sudhan shrestha	General Electronics Chat	5	5th August 2005 12:58 PM

22nd December 2008, 06:42 PM	#1
ahmedragia21	long range sensing Hi, Im trying to sense if there is an object at 100m ? can infrared do it or ultrasound ??

22nd December 2008, 07:19 PM	#4
blueroomelectronics	How would it be focused? __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com/

22nd December 2008, 07:23 PM	#5
ahmedragia21	just like that O -------------------X <-- object i really wanna do it to detect a human passing near that sensor then do an alarm

22nd December 2008, 07:28 PM	#6
blueroomelectronics	A couple of meters maybe, but unless your sensor has a narrow field of view and decent aim 100m is pretty far. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com/

22nd December 2008, 07:34 PM	#7
ahmedragia21	yea im looking for a sensor like that ...

22nd December 2008, 07:59 PM	#9
Leftyretro	Well some military have long range IR detection systems that have that kind of range but I'm sure it's not something easy or affordable. Lefty __________________ Measurement changes behavior

22nd December 2008, 11:00 PM	#10
ahmedragia21	hmm, so i wont do it ?

23rd December 2008, 12:58 AM	#12
ahmedragia21	hehe , really a nice soultion , but would you help me to find an electric solution ?

23rd December 2008, 01:08 AM	#13
dknguyen	The only solution I've found for something like that (and believe me I've looked long and hard) that isn't more than $5K is the Opti-Logic RS100 Industrial Laser Range Finder w/ RS232 Serial Computer Data Interface Ports w/ FREE UPS and it's variations. It still costs $500 though. It's also not terribly accurate...1% of 100m is still 1m which makes it useless up close. It can only see large targets due it's field of view (don't expect to be able to light up a point like with a laser pointer and find out how far it is...that takes one of the $5000+ models). 100m is too far for ultrasonic or infrared. Pretty much only laser and radar will do it. If you want to make a beam breaker though...that's easy. Just use a laser pointer and a sensor opposite of it. But you need something on both sides. Last edited by dknguyen; 23rd December 2008 at 01:11 AM.

23rd December 2008, 01:12 AM	#14
ahmedragia21	yea thanks ! i were about to show you the thread , i really wanted to hear your opinion .. well how about this kit <B>KIT1019</B><BR>Geophone, Seismic Kit - KIT1019 can it does the job ? but i really dont know how long it can sense the vibrations of feet of a human ?

23rd December 2008, 01:14 AM	#15
dknguyen	It's cheap enough to experiment with. I would think cars on the road might interfere with it though. But I doubt it works more than a few meters (definately not 100m). There's just too much noise. Last edited by dknguyen; 23rd December 2008 at 01:14 AM.