Dragino LoRaWAN LiDAR ToF, Руководство пользователя

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LLDS12 LoRaWAN LiDAR ToF Distance Sensor User Manual 22
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3. LiDAR ToF Measurement
3.1 Principle of Distance Measurement
The LiDAR probe is based on TOF, namely, Time of Flight principle. To be specific, the
product emits modulation wave of near infrared ray on a periodic basis, which will be
reflected after contacting object. The product obtains the time of flight by measuring round-
trip phase difference and then calculates relative range between the product and the
detection object, as shown below.
3.2 Distance Measurement Characteristics
With optimization of light path and algorithm, The LiDAR probe has minimized influence
from external environment on distance measurement performance. Despite that, the range
of distance measurement may still be affected by the environment illumination intensity and
the reflectivity of detection object. As shown in below:
①
Represents the detection blind zone of The LiDAR probe, 0-10cm, within which the output
data is unreliable.
②
Represents the operating range of The LiDAR probe detecting black target with 10%
reflectivity, 0.1-5m.
③
Represents the operating range of The LiDAR probe detecting white target with 90%
reflectivity, 0.1-12m.
Vertical Coordinates: Represents the radius of light spot for The LiDAR probe at the different
distances. The diameter of light spot depends on the FOV of The LiDAR probe (the term of
FOV generally refers to the smaller value between the receiving angle and the transmitting