Split-type piezoelectric sensor

A split-type piezoelectric sensor, characterized by comprising a first circuit board and a second circuit board,

• wherein the first circuit board comprises a sub-board, a piezoelectric film, and a first connector, wherein the sub-board and the first circuit board are located on a same plane, and the sub-board is located in a hollow area of the first circuit board and connected to one end in the first circuit board, so that the sub-board is displaceable by taking the end in the first circuit board as a fulcrum, wherein the piezoelectric film is attached to electrically connected to the sub-board, and wherein the first connector and the piezoelectric film are provided on a same side, and the first connector is electrically connected to the first circuit board;
• and
• wherein the second circuit board includes a signal processing unit and a second connector electrically connected to the signal processing unit, and wherein the second connector is opposite to and detachably connected to the first connector, and the second connector supports the first circuit board.