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WOh.2
Associate II
November 29, 2021
Solved

VL53L0X_GetRangingMeasurementData() function return items' meaning?

  • November 29, 2021
  • 1 reply
  • 815 views

I understood just RangeMilliMeter and SignalRateRtnMegaCps.

Could I know the details about the followings:

  • RangeDMaxMiliMeter
  • AmbientRateRtnMegaCps
  • EffectiveSpadRtnCount
  • RangeStatus's Min Range Fail

Best Regards,

Woojin

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

DMAX is the distance that we could see given an amount of ambient light. So if it was 50cm and we showed no target, then you could no there was NO target between the sensor and 50cm. As the ambient light (basically sunlight) goes up, DMAX will go down.

The AmbientRate is the number of photon counts we get before we turn the laser on. Thus our signal is anything over Ambient. But if the ambient is really high, the sensor is saturated and the sensor cannot 'see' anything.

The SpadRtn Count is the number of photon counts attributed to the signal. Sensor likes 20M counts, but we can make do with as few as 0.5M counts.

Min Range Fail is the sensor indicating your answer would have been negative if we allowed negative returns. If you get this re-examine the section on offset calibration. This error should not occur.

  • john

1 reply

John E KVAM
John E KVAMBest answer
ST Employee
December 15, 2021

DMAX is the distance that we could see given an amount of ambient light. So if it was 50cm and we showed no target, then you could no there was NO target between the sensor and 50cm. As the ambient light (basically sunlight) goes up, DMAX will go down.

The AmbientRate is the number of photon counts we get before we turn the laser on. Thus our signal is anything over Ambient. But if the ambient is really high, the sensor is saturated and the sensor cannot 'see' anything.

The SpadRtn Count is the number of photon counts attributed to the signal. Sensor likes 20M counts, but we can make do with as few as 0.5M counts.

Min Range Fail is the sensor indicating your answer would have been negative if we allowed negative returns. If you get this re-examine the section on offset calibration. This error should not occur.

  • john