When using the VL53L1CB for ranging, we want to achieve lower power consumption by reducing the measurement frame rate. I performed the following two experiments:
A 50ms measurement budget (integration time) followed by a 50ms waiting period.
A 50ms measurement budget followed by a 100ms waiting period.
I observed that the power consumption in both scenarios is nearly identical, with no significant difference. Using a photodetector, we confirmed that the ToF sensor's light emission time aligns with the measurement budget; a 50ms integration time results in approximately 50ms of light emission, confirming my parameter settings are effective. The power consumption curve shows that the power level remains high even after the ToF sensor has finished emitting light.
How can we reduce the power consumption during the waiting interval between measurements (without shutting down the sensor)?
If shutting down the sensor after each measurement achieves lower power consumption, what is the reason for this?
