Continued from 'Pepper' Humanoid Robot Teardown (1)
In the head of the Pepper, there are parts corresponding to human eyes, ears and mouth though their locations are different from those of human counterparts. The microphone array, which corresponds to human ears, is located near the top of the head. And speakers are located in areas where there would be ears in the case of humans.
Inside the holes that look like eyes, there is a range image sensor. The infrared light emitted from the left eye is reflected from an object, and the reflected light is received by the sensor in the right eye to measure depth.
On the top of the range image sensor, there is an orange-colored printed circuit board (PCB), and LEDs are surrounding the light emission and reception areas. The LEDs are used to emit pink or green light in the areas that look like human eyes.
Cameras, which correspond to human eyes, are located on the backside of the robot's face in the picture above. They look at the outer world through the hole in the forehead and the mouth.
We took out PCBs and other components attached to a frame in the head. A black rubber cylinder drew our attention. It is wrapped by a white frame in the picture above. The heat sink located to the lower left of the cylinder is attached to the range image sensor, and the orange PCB is fixed on the left side of the heat sink.
The component attached to the right side of the black cylinder houses a cooling fan. It is obviously a cylinder for sending air, but it is not clear where the air is going. There is another fan under the first fan, and the left-to-right (in the picture) air flow generated by the two fans seems to cool the entire head.
We continued the teardown.
When the cylinder was pulled out, the PCBs attached to the frame appeared.
We detached the orange-colored PCB on the side of the face.
We removed the range image sensor from the heat sink. The sensor seemed to be a product of Asustek Computer Inc.
We found a metal case equipped with the large heat sink.
It seemed to be the brain of the Pepper robot. In fact, there was a PCB on which Intel Corp's Atom processor was mounted.
Why the processor is located in the head? It is not necessary to locate parts corresponding to human organs in the same way as human counterparts. Actually, the locations of the robot's eyes and ears are different from those of human eyes and ears.
It could be for upgrading the robot's intelligence. Because the head can be easily detached, SoftBank Robotics might be considering upgrading the robot by replacing the head with a new one equipped with a new processor.