Why VL53L1CB requires multiple measurements for distances over 3 meters ?

[User.120]

    Since we require long-distance detection, we have employed both Ranging Mode and Long Distance Mode. Additionally, due to the use of battery power, power saving is essential. Consequently, we acquire the distance reading after just two sampling cycles.

    When the distance is less than 3 meters, we can successfully obtain readings without issue. However, when the distance exceeds 3 meters, acquiring a reading with only two sampling cycles becomes impossible. Instead, it requires 10 sampling cycles, or even several dozen cycles, to obtain a distance measurement. This significantly increases power consumption.

    Why are multiple measurements required to detect objects beyond 3 meters? Can this be improved?

    The software version we are using is STSW-IMG019: VL53L1CB_BareDriver_6.6.18.2652.

    Thank you for your help.

[Zhiyuan.Han · Accepted solution]

Hi

May I know what kind of target you are testing, L1CB need to get enough return signal from target to get the correct target distance information. normally the shorter distance or the higher reflectance target gives more return signal rate. and one more thing is the FOV coverage, in other word is the target size, the bigger size, the more return signal rate.

when target move further, less return signal come back, that why you need more frame to get enough return signal rate. 

If possible, you can past a reflective tape on your target, it is high reflective target, then beyond 3 meters, it will be possible to get ranging distance in short time. 

Br

Zhiyuan.Han