Patent ID: 8248085

Claim:
A motion sensor, comprising: a base comprising a rectangular bottom sheet, the bottom sheet comprising an inner side and an outer side opposite to the inner side; a first capacitance electrode comprising at least one group of first capacitance electrode sheets that is received within the base; and a second capacitance electrode comprising at least one group of second capacitance electrode sheets that is received within the base, the first capacitance electrode and the second capacitance electrode sheets being aligned with and parallel to each other to form a capacitance; wherein the outer side of the rectangular bottom sheet comprises a plurality of connecting sheets electrically connected to the first capacitance electrode and the second capacitance electrode, the first capacitance electrode sheets and the second capacitance electrode sheets are coupled to an external power source through the connecting sheets; when the motion sensor is subject to vibration, the second capacitance electrode sheets stray from the corresponding first capacitance electrode sheets, so that the capacitance is changed accordingly, the vibration is detected by detecting a change of the capacitance.