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ma_ge38
Joined: 02 Jan 2007
Posts: 2
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 02 Jan 2007 16:15 ir sensor circuit |
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hi... currently I am planning to build a IR distance sensor using normal IR emitter. However, the range for it is too short which is below 5cm. Is there any method to boost the range and increase the reliability of it? As I don't wish to use those expensive distance sensor. 
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dfullmer
Joined: 07 Jun 2006
Posts: 247
Helped: 33
Location: Some place Hot - Not an Island
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02 Jan 2007 23:58 distance sensor better ir or ultrasonic |
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Depending on your distance needs you might want to consider ultrasonic instead.
dfullmer
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ma_ge38
Joined: 02 Jan 2007
Posts: 2
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03 Jan 2007 2:18 best distance sensor |
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Hi, thanks for the reply in advance... My initial idea for this project is determine the distance by using the ratio of distance vs voltage across the receiver part of the sensor. As the intensity of the IR received changed, the voltage across the receiver part changed too... please correct me if there is any mistake. By the way, the distance I need to sense is just below 10cm.
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dfullmer
Joined: 07 Jun 2006
Posts: 247
Helped: 33
Location: Some place Hot - Not an Island
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03 Jan 2007 4:00 Re: IR Distance Sensor |
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Hi,
The problem that you face is that different materials would reflect the IR energy in different amounts. Different materials at the same disatance would give you different distances. If you plane to look at just one type of material then you could calibrate this problem out.
dfullmer
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Giuss
Joined: 16 Oct 2006
Posts: 38
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03 Jan 2007 21:43 IR Distance Sensor |
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| There are some nice infrared distance sensors made by Sharp frequently used in robotics
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Google
AdSense
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03 Jan 2007 21:43 Ads |
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AlexNadal
Joined: 28 Nov 2006
Posts: 25
Helped: 1
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16 Jan 2007 10:27 Re: IR Distance Sensor |
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For a distance sensor IR sensor is not the best option, you really really dont want to use an ultrasonic sensor?!
I recomend them
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Js_Ong
Joined: 15 Jan 2007
Posts: 40
Helped: 2
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18 Jan 2007 4:24 Re: IR Distance Sensor |
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| Hi, u can try the SHARP GP2D12/GP2D15, but this is for the distance from 10cm to 80cm. But I tried the couping before using "GaAIAs Infrared Emitter SFH 487" with "NPN-Silizium-Fototransistor SFH 309" or "Silicon NPN Phototransistor SFH 309 FA". It can give u the distance between 10cm. u can try this too "TOSHIBA LED Lamp GaAℓAs Red−light Emitter TLRA270". But I had tried out, using either one of the transmitter with same receiver, no problem at all. U just need to defind your range with the voltage received in your data acquisition stage.
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jagzviruz
Joined: 21 Dec 2005
Posts: 6
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22 Jan 2007 23:29 IR Distance Sensor |
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| sharp sensors are rather costly ...
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aliasadi
Joined: 07 Aug 2006
Posts: 3
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31 Jan 2007 0:53 Re: IR Distance Sensor |
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[quote="ma_ge38"]hi... currently I am planning to build a IR...
hi
can you help me to building a ir distace sensor using ir emitter.
it range is 1-5 cm.
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tanuki
Joined: 11 Jun 2001
Posts: 100
Helped: 3
Location: Spain
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01 Jan 2008 20:53 Re: IR Distance Sensor |
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| Some other IR sensors: http://www.taosinc.com/category.asp?cateid=4
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phluxor
Joined: 13 Aug 2007
Posts: 12
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10 Mar 2008 10:50 Re: IR Distance Sensor |
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| Been testing several IR circuits for measuring distance and they all pretty inconsistent. Would the sonar circuit above give better accuracy than IR? U'r help would be appreciated!
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kender
Joined: 19 Jun 2005
Posts: 1234
Helped: 88
Location: Stanford, SF Bay Peninsula, California, Earth, Solar System, Milky Way
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