Recently according to the number of a pet owner is increased, many IoT services which could track the behavior or location of dogs are appearing.
However, these systems focus only on the physical activities of dogs, and there is no service for recognizing positive or negative emotions of dogs.
In this paper, we have developed the Bowow system that identifies the emotions base on Heart Rate Variability (HRV) of a dog.
We have designed and built a wearable device that can be easily worn by dogs using a dog leash, and have enabled to users could observe in a real-time emotional state of a dog through a smartphone app.
We experimented with several situations that people often tell or do to dogs in their daily lives. We have shown that the Bowow system could help communication between dogs and people.
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