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Yusuf1
Visitor II
September 20, 2023
Solved

VL53l0x I cannot measure more than 400mm

Dear Sir,

     I am trying to read the distance from the VL53Lox i can read upto 400mm , when i try to measure more the 400mm it is not reading proper reading. Please guide

 

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John E KVAM
John E KVAMBest answer
ST Employee
September 26, 2023

I'm going to guess here a little bit. The sensor emits an invisible flash of light, and it measures the time-of-flight until that light comes back. But if your target is small or particularly non-reflective, not enough light comes back to get a good measurement. One can generally spot people to 1.5m and can spot a hand to 60-80 cm. 

If you think something is wrong, measure the distance one can 'see' to a large white wall. That should be to 2M. A non-white wall should go to 1.5M or a bit more. 

Try a standard sheet of paper - it's a good known reference as white paper is about  88% reflective and it's of a known size. 

From that sort of data, we can tell if your sensor meets expectations.

- john

If this or any post solves your issue, please mark them as 'Accept as Solution' It really helps. And if you notice anything wrong do not hesitate to 'Report Inappropriate Content'. Someone will review it.
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2 replies

Anne BIGOT
Anne BIGOT
ST Technical Moderator
September 26, 2023

Hello

Can you please give more details on the platform you are using in term of HW and SW ?

Thanks

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John E KVAM
John E KVAMBest answer
ST Employee
September 26, 2023

I'm going to guess here a little bit. The sensor emits an invisible flash of light, and it measures the time-of-flight until that light comes back. But if your target is small or particularly non-reflective, not enough light comes back to get a good measurement. One can generally spot people to 1.5m and can spot a hand to 60-80 cm. 

If you think something is wrong, measure the distance one can 'see' to a large white wall. That should be to 2M. A non-white wall should go to 1.5M or a bit more. 

Try a standard sheet of paper - it's a good known reference as white paper is about  88% reflective and it's of a known size. 

From that sort of data, we can tell if your sensor meets expectations.

- john

If this or any post solves your issue, please mark them as 'Accept as Solution' It really helps. And if you notice anything wrong do not hesitate to 'Report Inappropriate Content'. Someone will review it.
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