| 摘要 |
An anti-vandalism detection and alarm system is disclosed for detecting (3, 16) and reporting (7, 51, 52) the scratching of relatively hard materials (12) such as glass and plastic which generate characteristic sound or vibration frequencies during scratching, and for detecting (36) and reporting (51, 52) the cutting and slashing of relatively soft materials (28, 29) such as fabric, leather and plastic. |
