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shinaisense's Introduction

Shinai Sense (竹刀のセンサー)

Shinai Sense is a sensor device aiming at gathering data about how users use their Shinai during kendo practice. The device is attached to the sword and connected via bluetooth to a computer.

Status

First version under heavy development.

Operations

Shinai Sense is a device composed of two boards. The mainboard is put between the tsuba and tsuba dome. The second is located inside the kensen. The mainboard holds a rechargable battery, the main microcontroller, one 9 axis IMU sensor and the RF parts. The second board in the kensen only holds a second 9 axis IMU. that is connected over a cable routed inside the shinai's channel. Data is gathered from both sensors and sent to a computer using Bluetooth 5 Low Energy.

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shinaisense's Issues

Power storage strategy

Power supply

Associated requirements

  • The system shall operate at least 3h continuously.
  • The system shall operate from a battery.
  • The system shall operate at 2.5v.
  • The power storage/conversion system shall not exceed 50g.
  • The power storage/conversion system shall support realistic mechanical forces caused by the impacts.

Tasks

Define license

It is necessary to define a license for hardware, firmware and software.

Kensen PCB

Kensen PCB

This PCB is located inside the Kensen.

Associated requirements

  • The Kensen pcb shall fit inside a custom 3D printed Kensen for easy replacement.
  • The Kensen pcb shall contain an 9 axis IMU with hot-switchable sensitivity ranges 1G to 10G.

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