Biological potential input interface system, sensor device, and method

A sensor device for measuring biological potential of a user, for use in a biological potential input interface system including:

• a determination circuit configured to determine a motion of the user from the biological potential of the user against a determination criterion which is prepared in advance, and generate a control signal corresponding to the motion;
• and a control circuit configured to control operation of an internal circuit of an appliance based on the control signal, wherein,
• the sensor device includes a plurality of electrode chambers, a measurement chamber, and an accommodation chamber which are proximately connected to each other in annular relationship permitting expansion and contraction, wherein the annular relationship has an ordering of elements of:
• the measurement chamber, next a first group of electrode chambers, next the accommodation chamber, next a second group of electrode chambers, and back to the measurement chamber,
• each of the plurality of electrode chambers having a measurement electrode,
• the measurement chamber having a biological potential measurement circuit which is connected with each measurement electrode via electrically conductive wiring for measuring biological potential of the user by using the measurement electrode, and
• the accommodation chamber having an internal protrusion, such that the wiring which connects at least one measurement electrode and the biological potential measurement circuit is provided around the protrusion, the wiring having a length which enables longitudinal feeding in accordance with an amount of elongation when the sensor device is elongated, wherein
• a maximum clearance S between the accommodation chamber and an adjacent one of the electrode chambers is greater than a maximum clearance R between any two adjacent electrode chambers among the plurality of electrode chambers.

A method to be performed in a biological potential input interface system, comprising the steps of:

• providing a sensor device with which to measure biological potential of a user;
• and
• determining a motion of the user from the biological potential of the user against a determination criterion which is prepared in advance, and generating a control signal corresponding to the motion;
• and
• controlling operation of an internal circuit of an appliance based on the control signal,
• the sensor device including a plurality of electrode chambers, a measurement chamber, and an accommodation chamber which are proximately connected to each other in annular relationship permitting expansion and contraction, wherein the annular relationship has an ordering of elements of:
• the measurement chamber, next a first group of electrode chambers, next the accommodation chamber, next a second group of electrode chambers, and back to the measurement chamber,
• each of the plurality of electrode chambers having a measurement electrode,
• the measurement chamber having a biological potential measurement circuit which is connected with each measurement electrode via electrically conductive wiring for measuring biological potential of the user by using the measurement electrode, and
• the accommodation chamber having an internal protrusion, such that the wiring which connects at least one measurement electrode and the biological potential measurement circuit is provided around the protrusion, the wiring having a length which enables longitudinal feeding in accordance with an amount of elongation when the sensor device is elongated, wherein
• a maximum clearance S between the accommodation chamber and an adjacent one of the electrode chambers is greater than a maximum clearance R between any two adjacent electrode chambers among the plurality of electrode chambers.