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Non-contact shock sensor

  • US 7,673,513 B2
  • Filed: 09/06/2007
  • Issued: 03/09/2010
  • Est. Priority Date: 09/08/2006
  • Status: Expired due to Fees
First Claim
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1. A sensor device for monitoring an acceleration of an object during a transportation, comprising:

  • an acceleration sensor that is permanently connected to the object; and

    an RFID transceiver device connected to the acceleration sensor that non-contact couples electrical energy into the acceleration sensor and emits a radio signal based on a physical state of the acceleration sensor;

    wherein the acceleration sensor includes;

    a movable mass that deflects from a rest position as a function of the acceleration,a support frame that holds the movable mass, andan electrical conductor linked to the REID transceiver device that is irreversibly interrupted if the deflection of the movable mass exceeds a predetermined threshold value;

    and wherein the support frame comprises a sensor wall that is permanently connected to the electrical conductor and the movable mass is pressed against the sensor wall as a function of the acceleration to interrupt the electrical conductor if the pressure on the sensor wall exceeds a predetermined threshold value.

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