Nowadays, robots are increasingly being used in the industrial sector to perform various types of tasks including spot welding, arc welding, materials handling, and routing. Currently, there are over 1 million robots in use in the industrial sector throughout the world. The history of robot safety may be traced back to the 1980s with the development of the American National Standard for Industrial Robots and Robot Systems: Safety Requirements [1], and the Japanese Industrial Safety and Health Association document entitled “An Interpretation of the Technical Guidance on Safety Standards in the Use, etc., of Industrial Robots” [2].