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VL53L0X_GetRangingMeasurementData() function return items' meaning?

WOh.2
Associate II

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

1 ACCEPTED SOLUTION

Accepted Solutions
John E KVAM
ST Employee

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

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.

View solution in original post

1 REPLY 1
John E KVAM
ST Employee

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

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.