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sample data suggests temp has no direct correlation to measurement drift!

A project log for 10x improve VL53L0x. Volts, laserPOW analog mod

collecting data on distance variation, room temp, voltage on chip, and laser power, results: laser and voltage compensate improve accuracy!

jamesdanielvjamesdanielv 01/21/2021 at 01:010 Comments

it is interesting, i logged temp changes over 8 hours, along with measurements over 528 minutes worth, and i can say fore sure in my case, that with my version of the VL53L0x, that temp is not the main noise issue! if it is then it is from a voltage regulator or something not directly related to my temp. here is 8hrs of temp data, and 8hrs of measurement data.

the first 24 values are required for stabilizing from zero. temp is averaged out over 10 samples with average showing every second but it is updated 30-50 times a second as with VL53L0x lidar. i left heat off in a room and the temp went down consistently over night from about 16deg c to 12deg c. (60F to 53F sensor variation was wide over this time but consistent after stabilizing, there were some up and downs, but it is not consistent with temp. more than likely it has to do with voltage in chip, and possibly temp effect on voltage regulator. needless to say it is quite obvious that temp is not directly related to sensor variation!

first several values of distance are set to 73 to allow for a zoomed show of variation from +/-3 from 72 on axis rather than +/-73 degrees on axis. there are about 32000 values shown here! data is in article as excel, and cvs and as raw data.

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