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Strain gauge with moisture barrier and self-testing circuit

  • US 7,461,560 B2
  • Filed: 03/28/2005
  • Issued: 12/09/2008
  • Est. Priority Date: 03/28/2005
  • Status: Expired due to Fees
First Claim
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1. A system, comprising a structure and a device, wherein said structure has a structure surface, wherein said device is mounted on said structure surface, wherein said device includes a protective cover, a circuit, a strain sensor, a moisture detector, and a radio frequency transmitter, wherein said strain sensor is bonded to said structure surface with a bond susceptible to damage from moisture, wherein said circuit, said strain sensor, said moisture detector, and said radio frequency transmitter are located within said protective cover, wherein said moisture detector is positioned to provide information about moisture in said protective cover, and wherein said circuit provides data derived from said strain sensor and from said moisture detector to said radio frequency transmitter for external transmission wherein said moisture detector comprises a capacitor.

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