US 7,673,513 B2Granted

Non-contact shock sensor

AssigneeSiemens Aktiengesellschaft

InventorsSebastian Görtler, Robert Kagermeier, Rainer Kuth, Klaus Ludwig, Gerhard Weller

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Abstract

The invention relates to a sensor device for monitoring accelerations to which an object is subjected. In order to detect whether a value has exceeded or is below a threshold for the acceleration to which objects have been subjected in the past, i.e. without having visual contact with the sensor, the inventive sensor device includes an acceleration sensor, which is permanently linked to the object to be monitored, so that a relative movement between the acceleration sensor and the object is prevented, and an RFID transceiver for non-contact coupling of electrical energy into the acceleration sensor and for sending out radio signals as a function of the physical state of the acceleration sensor.

Claims16

Dependent claims

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, and
an 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.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/899,553Filed 6 Sep 2007
Priority: DE 10 2006 042 3828 Sep 2006
Published: US 2008/0307884 A118 Dec 2008
Granted: 9 Mar 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

G01P 15/0891
With conversion into electric or magnetic values: with indication of predetermined acceleration values
G01P 15/06
For indicating maximum value: using members subjected to a permanent deformation
G01P 15/135
With conversion into electric or magnetic values: by making use of contacts which are actuated by a movable inertial mass
G01P 15/18
Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration: in two or more dimensions