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公开(公告)号：US07263892B2
公开(公告)日：2007-09-04
申请号：US11337427
申请日：2006-01-23
IPC分类号： G01L7/08
CPC分类号： B60C23/0408
摘要： A surface acoustic wave device includes a micro-machined pressure transducer for monitoring tire pressure. The device is configured having a micro-machined cavity that is sealed with a flexible conductive membrane. When an external tire pressure equivalent to the cavity pressure is detected, the membrane makes contact with ridges on the backside of the surface acoustic wave device. The ridges are electrically connected to conductive fingers of the device. When the detected pressure is correct, selected fingers on the device will be grounded producing patterned acoustic reflections to an impulse RF signal. When the external tire pressure is less than the cavity reference pressure, a reduced reflected signal to the receiver results. The sensor may further be constructed so as to identify itself by a unique reflected identification pulse series.
摘要翻译： 表面声波装置包括用于监测轮胎压力的微加工压力传感器。 该装置被配置为具有用柔性导电膜密封的微加工空腔。 当检测到与腔体压力相当的外部轮胎压力时，膜与声表面波装置的背面的脊部接触。 脊电连接到装置的导电指状物。 当检测到的压力正确时，设备上的选定的手指将被接地，从而产生对脉冲RF信号的图案声反射。 当外部轮胎压力小于腔体参考压力时，对接收器的反射信号减小。 传感器还可以被构造成通过独特的反射识别脉冲序列来识别自身。
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公开(公告)号：US06912914B2
公开(公告)日：2005-07-05
申请号：US10611523
申请日：2003-07-01
CPC分类号： G01N3/08 , G01L1/146 , G01N19/02 , G01N2203/0617
摘要： A sensor array is configured based upon capacitive sensor techniques to measure stresses at various positions in a sheet simultaneously and allow a stress map to be obtained in near real-time. The device consists of single capacitive elements applied in a one or two dimensional array to measure the distribution of stresses across a mat surface in real-time as a function of position for manufacturing and test applications. In-plane and normal stresses in rolling bodies such as tires may thus be monitored.
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公开(公告)号：US07096736B2
公开(公告)日：2006-08-29
申请号：US10633774
申请日：2003-08-04
IPC分类号： G01L7/08
CPC分类号： B60C23/0408
摘要： A surface acoustic wave device includes a micro-machined pressure transducer for monitoring tire pressure. The device is configured having a micro-machined cavity that is sealed with a flexible conductive membrane. When an external tire pressure equivalent to the cavity pressure is detected, the membrane makes contact with ridges on the backside of the surface acoustic wave device. The ridges are electrically connected to conductive fingers of the device. When the detected pressure is correct, selected fingers on the device will be grounded producing patterned acoustic reflections to an impulse RF signal. When the external tire pressure is less than the cavity reference pressure, a reduced reflected signal to the receiver results. The sensor may further be constructed so as to identify itself by a unique reflected identification pulse series.
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