Buddy-kun is a robot that talks with everyone,
instructs and guides singing and gymnastics, and
plays musical instruments in kindergartens and
It can't have very advanced conversations, but
it takes advantage of AI and use speech
recognition and speech synthesis to join the
You can get information about your daily life.
It plays a leading role in recreational
It can also play musical instruments.
It can ring the bell from the note C to the note
A using both hands.
Multiple units can work together to play songs
with a wider range.
The three units work together to ring the bell
from C to upper G.
When the four units work together, can add
semitones such as F Sharp and G Sharp to play a
Buddy-kun has a mechanism for communicating with
people and playing music on multiple units.
Devices such as a 3D camera, microphone array,
and speakers are connected to a small PC carried
on the back.
It also has nine servo motors to move its head
It can express emotions by devising the lighting
pattern of the LEDs.
Realsense has the function of measuring the
distance to an object in addition to the
function of a normal camera, and is used to
recognize objects and faces.
A re-speaker is a microphone array that can
identify the direction of sound and remove
ambient noise and self-generated sound.
A field of AI called machine learning is used
for object recognition and programs that compose
Programs that control sensors and motors are
integrated on the OS for robots called ROS.
Normally, Buddy-kun works independently, but If
multiple units perform an ensemble, they must be
connected to one PC and synchronized.
It uses software developed specifically to send
commands to each robot connected by a cable.
When the program loads a music file in MIDI
format, it is converted into motion data for
each robot and sent out at the right time.
They can play chords by letting two robots hit
the bell at the same time.
Acrylic is used as the material for the frame of
Parts are designed with CAD software and cut
with a laser cutter.
Cube-shaped metal fittings are used for
Power is supplied from a mobile battery using a
Keihana Science city
It is powered by a 5V output USB mobile battery.
2022 Nara Pref. Nursing care award A group home that has
introduced Buddy-kun won the Nara Nursing Care Award as an example of
using robots for recreational activities.
Amazing Maker Awards 2022 3rd prize in social impact category (The
award is under name the co-developer of middle school classmate.)