Sensor Apparatus

A sensor apparatus, comprising a bracket, a first polar plate, a first contact portion, a first leading wire, a rotating shaft, a support frame, a second polar plate, a second contact portion, and a second leading wire, wherein

• the bracket is of a cylindrical structure with two open ends;
• the first polar plate is disposed at a first end of the bracket;
• the first contact portion is configured to be in rigid contact with a to-be-measured object, and is disposed at a second end of the bracket;
• the first leading wire is disposed on the first polar plate and an external side of the bracket, one end of the first leading wire is connected to the first contact portion, and the other end of the first leading wire is connected to the first polar plate;
• the second contact portion is disposed at a first end of the support frame, the second polar plate is disposed at a second end of the support frame, the rotating shaft is disposed between the first end of the support frame and the second end of the support frame, and the support frame is hinged to the bracket by the rotating shaft;
• the second contact portion is configured to be in rigid contact with the to-be-measured object;
• and
• the second leading wire is disposed on the support frame and the second polar plate, one end of the second leading wire is connected to the second contact portion, the other end of the second leading wire is connected to an internal side of the bracket, and both the other end of the second leading wire and the first leading wire are located on a same side of the bracket.