Time-of-flight imager for object and gesture recognition in cars

March 10, 2020 //By Christoph Hammerschmidt
Time-of-flight imager for object and gesture recognition in cars
With the E527.31 the semiconductor manufacturer Elmos AG presents a CMOS-based 3D ToF imager for applications in the vehicle interior and exterior. The chip is certified according to the automotive standard AEC-Q 100 and is characterized by its optimized power consumption: In addition to the normal operating mode it also features a sleep mode in which power consumption is reduced to a minimum.

The E527.31 was designed for use in human-machine interface (HMI) applications. Object detection in the near field of the vehicle as well as gesture detection in the exterior or interior are possible.

Typical applications in the interior of vehicles are gesture-controlled infotainment systems or monitoring the number of people in the car. Outside, automatic tailgates and doors that are controlled by gestures are possible areas of application. If the imager is integrated into the B-pillar, collisions with moving and static obstacles such as cyclists, curbs or marking posts can also be prevented. The precise detection of steps or objects and the generation of a realistic 3D image of the environment also allows the imager to be used in self-propelled robots.

The E527.31 offers a resolution of 32x32 pixels and is installed in a standard QFN44L7 package. It is supplied with an optical bandpass filter for 850 nm. Customer-specific adaptations of the optical filter in the range from 850 nm to 940 nm are possible. The device controls the light source to be used (LED, VCSEL, laser) to optimize the light pulses and thus the object illumination for the application. An integrated temperature sensor enables the compensation of temperature changes on, the distance measurement. From the digital data supplied by the sensor, the distance information is read out by using an external controller with implemented software algorithms.

More information: https://www.elmos.com/english/index.html


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