| 摘要 |
The invention provides a weight sensor ( 10 ) which includes a first electrically conductive sheet ( 12 ) electrically isolated from a second electrically conductive sheet ( 14 ) by inserts of a closed cell foamed polymeric dielectric ( 16 ) and an elastic dielectric ( 18 ) in spaces ( 20 ) formed between the inserts ( 16 ) located between the sheets ( 12, 14 ). The sensor ( 10 ) also includes capacitive measuring means ( 24 ), electrically connected between the first sheet ( 12 ) and the second sheet ( 14 ), which measures a change of capacitance between the sheets ( 12, 14 ) when a vehicle passes over the sheets ( 12, 14 ). The sensor ( 10 ) further includes converting means ( 26 ) for converting the change of capacitance to a number related to a weight of the vehicle. |
