A novel protective proximity sensor for machinery based on the effects of ELF fields on human body

A novel concept to implement sensitive protective device for machinery based on the effects of ELF (Extremely Low Frequency) fields on the human body is proposed, designed, and tested in this paper. Although the proposed technique is relatively simple with significantly low implementation cost compared to other available techniques, its experimental results obtained in real-time at both laboratory and workshop environments reveal its potential effectiveness in minimizing hazards associated with machinery.