Action state estimation apparatus, action state estimation method, action state learning apparatus, and action state learning method

An action state estimation apparatus comprising:

• a displacement detection sensor configured to detect a displacement measurement signal by converting displacement on a skin surface of a test subject due to tremor and deformation into a voltage that corresponds to the displacement measurement signal;
• a storage medium;
• and
• a processing apparatus that includes a first sampling portion configured to sample the displacement measurement signal of the test subject that is detected by the displacement detection sensor and is within a predetermined time and to generate displacement measurement data based on the sampled displacement measurement signal;
• an action state model storage configured to store in the storage medium an action state model modeled by associating the displacement measurement data with a loaded state of a muscle of the test subject;
• and
• an estimation calculation portion configured to estimate the loaded state by setting the displacement measurement data as an input vector and using the action state model.