Fencing device for use during e.g. battle, has signal calibrating block detecting or measuring value of signal from periodic signal creating block, and frequency detecting block detecting frequency of sword contacting with helmet

摘要

The device has a periodic signal creating block (1) for creating a periodic signal with a non-zero average value. A signal calibrating block (2) detects or measures a value of the signal received from the periodic signal creating block. A frequency detecting block (3) branching on a helmet detects frequency of a sword contacting with the helmet. An information processing block (4) process information from the blocks (2, 3).