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Yusuf1
Visitor II
September 20, 2023
Solved

VL53l0x I cannot measure more than 400mm

  • September 20, 2023
  • 2 replies
  • 1673 views

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

 

This topic has been closed for replies.
Best answer by John E KVAM

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

2 replies

Anne BIGOT
Anne BIGOT
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

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