STMicroelectronics has introduced a new generation of high-accuracy proximity and ranging sensors based on FlightSense Time-of-Flight (ToF) technology. The Proximity sensors use simple Infra-Red technology and directly measure distance based on the time for emitted photons to be reflected, enabling accurate distance ranging regardless of the object’s surface characteristics.
Ranging performance of the Time-of-Flight sensor is unaffected by object color or reflectivity. The speed and precision of ToF sensing enable FlightSense sensors to manage basic on/off control as well as to detect and interpret gestures like tapping and swiping for smart touchless human-machine interaction. The easy-to-setup device displays a green OK signal that changes to red if a person crosses a safe minimum-distance threshold.
These sensors provide a linear response when measuring short distances, which makes them ideal to be used inside dispensing machines to detect the level of hand-sanitizing liquid or the number of personal protective items like face masks.
Aura Aware, which is the Amsterdam-based startup, is making use of this FlightSense ToF technology in a smart distance-awareness portable device suitable for use at retail counters and check-in desks. The sensors can help users avoid contact with surfaces, including self-service touchscreens, smart faucets, and push-button door openers located in high-traffic areas. The sensor has an operating range of up to four meters and very low power consumption. Signal processing built into the sensor not just simplifies the design but provides sophisticated features like crosstalk compensation too maintaining measurement accuracy even if the sensor window becomes obscured by foreign material.
