Robot vacuum cleaners move about automatically by measuring the position of walls and furniture, as well as the distance to surrounding obstacles. To do this measurement, it applies the principle of TOF (time-of-flight) and triangulation using light. A laser diode or LED is used for the light emitter device, and an image sensor or photo IC is used for the photosensor.
Hamamatsu offers a selection of products suitable for applications in robot vacuum cleaners.
|Applications||Distance measurement method||Photosensor|
|Collision prevention, falling prevention||Direct TOFSi PIN photodiode||Si PIN photodiode|
|Photosensor with front-end IC|
|TriangulationOne-dimensional PSD||One-dimensional PSD|
|CMOS linear image sensor|
|Scanning measurement, mapping||Indirect TOF||Distance linear image sensor|
|Triangulation||CMOS linear image sensor|
This compact devices integrate optical sensors, such as photodiodes and APD, with the front-end IC.
This one-dimensional distance image sensor uses the TOF method to measure distance. This is a 64 pixel type.
It rotates a unit with a built-in distance linear image sensor and a laser to do omnidirectional distance measurement of the room.
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