Apparatus for controlling power source

An apparatus for controlling a power source comprising:

• a detecting unit that detects physical parameters of at least two shafts of power bodies driven by at least two power sources, and motion directions of the power bodies;
• a safety range setting unit that sets a first safety range for the physical parameters and that independently sets a second safety range of the motion directions of the at least two shafts that prevent an operator from coming into contact with the power bodies;
• a limiting range setting unit that sets a first limiting range for the physical parameters and that independently sets a second limiting range of the motion directions of the at least two shafts, the first limiting range and the second limiting range set independent of the first safety range and the second safety range, the first limiting range and the second limiting being different from the first safety range and the second safety range;
• a determining unit that makes a first determination of whether the physical parameters fall within the first safety range or within the first limiting range and that makes a second determination of whether the motion directions of the at least two shafts fall within the respective second safety range or within the second limiting range;
• a logical product unit that first receives the first determination from the determining unit, and independently receives the second determination from the determining unit and generates a logical product if both the first determination and the second determination indicate that the physical parameters and the motion directions fall within the respective first and second limiting ranges;
• and
• a limiting unit that limits operations of the at least two power sources only when the generated logical product of both the first determination and the second determination indicate that the physical parameters and the motion directions of the at least two shafts fall within the respective first and second limiting ranges.

An apparatus for controlling a power source comprising:

• a detecting unit that detects physical parameters and rotation directions of at least two drive unit shafts of at least two power sources that drive power bodies;
• a safety range setting unit that sets a first safety range of physical parameters and that independently sets a second safety range of the rotation directions of the respective at least two drive unit shafts preventing an operator from coming into contact with a power body;
• a limiting range setting unit that sets first limiting ranges of the physical parameters and that independently sets second limiting ranges of the rotation directions of the respective at least two drive unit shafts, the first limiting range and the second limiting range set independent of the first safety range and the second safety range, the first limiting range and the second limiting being different from the first safety range and the second safety range;
• a determining unit that makes a first determination of whether the physical parameters fall within the first safety range or within the first limiting range and that makes a second independent determination of whether the rotation directions of the at least two drive unit shafts fall within the second safety range or within the second limiting range;
• a logical product unit that first receives the first determination from the determining unit, and independently receives the second determination from the determining unit and generates a logical product if both the first determination and the second determination indicate that the physical parameters and the rotation directions fall within the respective first and second limiting ranges;
• and
• a limiting unit that limits operations of the at least two power sources only when the generated logical product of both the first determination and the second determination indicate that a combination of at least two of the physical parameters and the rotation directions of the respective at least two drive unit shafts fall within the first and second limiting ranges.