| 摘要 |
<p>A stress wave sensor (1) comprising a piezoelectric film (28) and means therein (50) for connection to sensor electronics (42). The piezoelectric film (28) preferably comprises polyvinylidene fluoride. Also a stress wave sensor system and methods employing one or more such stress wave sensors, preferably attached to a vehicle transparent component, most preferably to the vehicle windshield (12).</p> |
