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You are here: Home / Topics / Distance measurement using InfraRed sensor with ADC0804 & 8051 microcontroller (AT89C51)

Distance measurement using InfraRed sensor with ADC0804 & 8051 microcontroller (AT89C51)

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Microcontroller › 8051 › Distance measurement using InfraRed sensor with ADC0804 & 8051 microcontroller (AT89C51)

  • This topic has 3 replies, 4 voices, and was last updated 8 years, 5 months ago by Hari Prasaath K.
Viewing 4 posts - 1 through 4 (of 4 total)
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  • April 20, 2011 at 7:19 am #871
    Uttam Dutta
    Participant

     

    It is mentioned here (Distance measurement using InfraRed sensor with ADC0804 & 8051 microcontroller (AT89C51)   )that  Exact distance of the object can be dispalyed into LCD, can you tell me exact means what is the resolution , is it less tahn 1 mm or 1cm or what.
    My second question is that –  what is the minimum distance  IR led can sense because it is mentioned  in your article that “The major drawback of IR based sensors is their capability of detecting short distances.” – does it mean that it start sensing after 10 cm or any thing like this .
    Please reply
    regards,
    Uttam Dutta

    October 4, 2016 at 8:55 am #14178
    GANEEV SINGH
    Participant

    Hi Uttam

    IR sensors work with infrared light which cannot be seen by a naked human eye. Also deploying such sensors in distance measuring tasks which demand a good precision, is not a right thought. These sensors change their values just by variation in light pattern around them. So according to me IR sensors won't solve this issue. Try using something related to sound, like ultrasonic and all, they'll give good results :)

    October 5, 2016 at 6:55 pm #14184
    Ashutosh Bhatt
    Participant

    IR sensors are very much prone to sunlight. their perfomance deteriorates in sunlight.

    they are mostly used in indoor applications

    resolution i dont know that you have to check with the datasheet

    January 26, 2017 at 7:50 am #14375
    Hari Prasaath K
    Participant

    You can choose the sensor for distance measurement based on your application i.e whether indoor or outdoor application and based on the distance.

    If indoor you can use IR sensor and for short distance (upto 10cm) it will not be appropriate.

    If you want measure in outdoor better you can choose ultrasonic sensor.

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