Abstract
A logic-based safety system to facilitate the safety of the human worker in a human-machine system is constructed. The safety system contains a safety confirmation sensor which issues a work output permission to the machine, which predicts and confirms safety, and which samples safety information. If safety information is not obtained, a safe state is assured by decisions based on energy. The safety system governs the work output of the machine according to the safety information sampled by the sensor and guarantees safety involving entropy increase. Any visual safety confirmation action the human worker takes in order to reach a safety decision cannot satisfy this basic system. A safe work system with the function of generating a prediction space on the machine side is constructed by applying an ultrasonic pulsed radar sensor to automated guided vehicles (AGV).
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