| 摘要 |
The motion detector according to the invention is comprised of a piezo-electric element (26, 27) provided with electrodes (28) and mounted inside a closed housing (31) wherein a weight (25) is movably enclosed. The piezo-electric element provides a pulse when it is struck by the weight (25). A micro-computer (18) adds and records the pulses of the terminals of said piezo-electric element (26, 27). |
