Sensor and electronic device

A sensor, comprising:

• an element section;
• and
• a controller,
• the element section including:
• a base;
• a first fixed portion fixed to the base;
• a first other fixed portion fixed to the base;
• a first fixed electrode fixed to the base;
• a first other fixed electrode fixed to the base;
• and
• a first movable member,
• a first gap being provided between the base and the first movable member,
• the first movable member including:
• a first movable base supported by the first other fixed portion;
• a first beam;
• and
• a first movable structure,
• the first beam including a first beam portion, a first other beam portion, and a first intermediate beam portion,
• the first beam portion being connected to the first fixed portion,
• the first other beam portion being connected to the first movable base,
• a second direction from the first beam portion to the first other beam portion crossing a first direction from the base to the first other fixed portion,
• the first intermediate beam portion being between the first beam portion and the first other beam portion,
• the first movable structure including:
• a first movable electrode;
• a first other movable electrode;
• and
• a first movable connecting portion,
• a direction from the first movable electrode to the first other movable electrode being along a third direction crossing a plane including the first direction and the second direction,
• the first movable electrode and the first other movable electrode extending along the second direction,
• the first movable connecting portion being connected to the first intermediate beam portion,
• the first movable connecting portion extending along the third direction,
• the first movable connecting portion being connected to the first movable electrode and the first other movable electrode,
• the controller being configured to perform a first operation and a second operation,
• the controller being configured to control a first potential between the first other fixed electrode and the first other movable electrode in the first operation, and
• the controller being configured to apply a first AC voltage between the first fixed electrode and the first movable electrode in the second operation.