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    • 6. 发明授权
    • Method and apparatus for acoustically weighing moving loads
    • 用于声速称重移动载荷的方法和装置
    • US07454972B2
    • 2008-11-25
    • US11513348
    • 2006-08-31
    • Joseph S. HeymanJohn E. Lynch
    • Joseph S. HeymanJohn E. Lynch
    • G01N19/08G01N29/07
    • G01G19/022G01G9/00
    • Acoustic weight or mass sensing technology (referred to here as Acoustic Weigh In Motion (AWIN)) provides accurate weighing of any type of moving load moving over a load bearing medium. Acoustic transducers are affixed to or embedded in the load bearing medium. One or more source acoustic transducers propagate an acoustic wave over an acoustic path through the medium between the source and receiver transducers when the medium is in an unloaded state. The wave is detected at one or more receiving acoustic transducers. A propagation time delay is determined for the unloaded state. When a moving load travels over the acoustic path in the medium, the acoustic propagation time delay for that loaded state is determined. The difference between the acoustic propagation time delays for the unloaded and loaded states is determined. That acoustic propagation time delay difference is used to determine the weight or mass of the moving load.
    • 声学重量或质量感测技术(这里称为声学称重运动(AWIM))可以精确称重在负载介质上移动的任何类型的移动负载。 声学换能器固定在或嵌入承载介质中。 当介质处于无负载状态时,一个或多个源声换能器在声波路径之间传播通过源和接收器换能器之间的介质的声波。 在一个或多个接收声学换能器处检测到波。 确定无载状态的传播时间延迟。 当移动的载荷在介质中的声学路径上行进时,确定该载荷状态的声学传播时间延迟。 确定无载和负载状态的声传播时间延迟之间的差异。 声传播时间延迟差用于确定移动负载的重量或质量。