People Counting Using a Single ST Time-of-Flight Sensor

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ST’s FlightSense Technology can detect people as they enter and exit a room. The use of a Time-of-Flight Sensor can help building managers keep track of occupation and control their spaces for a very affordable cost.
Although called a People Counter, the VL53L1X simply detects a shape under the door jam and determines the direction of travel. The device is then able to use this information to determine whether the shape is entering or exiting the room.
The VL53L1X is a state-of-the-art, Time-of-Flight (ToF), laser-ranging sensor, enhancing the ST FlightSense™ product family. It is the fastest miniature ToF sensor on the market with accurate ranging up to 4 m and fast ranging frequency up to 50 Hz
Housed in a miniature and reflowable package, it integrates a SPAD receiving array, a 940 nm invisible Class1 laser emitter, physical infrared filters, and optics to achieve the best ranging performance in various ambient lighting conditions with a range of cover window options.
Unlike conventional IR sensors, the VL53L1X uses ST’s latest generation ToF technology which allows absolute distance measurement whatever the target color and reflectance.