Robot system and robot control device

A robot control device, which is provided with a sensor for detecting a state of an outside world, and symbol selecting means for inputting a detection value from the sensor and selecting, from a plurality of symbols, a symbol representing the state of the outside world in accordance with the sensor detection value, and which conducts reasoning based on the symbol selected by the symbol selecting means and operates an actuator based on a result of the reasoning, the robot control device comprising:

• sensor detection value inputting means for inputting the sensor detection value to the symbol selecting means when the sensor detection value has reached a certain reference value,
• first actuator operating means for taking the symbol selected by the symbol selecting means in accordance with the sensor detection value input by the sensor detection value inputting means and setting it as a first symbol candidate, and operating the actuator to verify that the first symbol candidate represents the state of the outside world;
• judging means for inputting the sensor detection value taken after the actuator has been operated by the first actuator operating means to the symbol selecting means, taking the symbol selected by the symbol selecting means in accordance with the input sensor detection value and setting it as a second symbol candidate, and judging whether the second symbol candidate matches with the first symbol candidate;
• and
• second actuator operating means which, when the judging means judges that the first symbol candidate and the second symbol candidate match, conducts reasoning based on the matched symbols, and operates the actuator based on the result of the reasoning.