Fiber composite with a piezoelectric sensor or actuator integrated therein

• US 6,703,766 B2
• Filed: 06/25/2001
• Issued: 03/09/2004
• Est. Priority Date: 06/23/2000
• Status: Expired due to Fees

• Current Assignee: Dornier GmbH (Government of France)
• Original Assignee: Dornier GmbH (Government of France)
• Inventors: Duerr, Johannes K.
• Primary Examiner(s): Dougherty, Thomas M.
• Application Number:
  US09/887,563
• Publication Number:
  US 20020021058A1
• Time in Patent Office: 988 Days
• Field of Search: 310/340, 310/341, 310/311
• US Class Current: 310/340
• CPC Class Codes: H10N 30/875 Further connection or lead arrangements, e.g. flexible wiring boards, terminal pins
• CPC Class Codes: H10N 30/88 Mounts; Supports; Enclosures; Casings
• CPC Class Codes: Y10T 428/2931 Fibers or filaments nonconcentric [e.g., side-by-side or eccentric, etc.]

Abstract

A fiber composite component has a piezoelectric actuator or sensor integrated therein. Electric feed lines for the actuator or sensor are constructed in the form of electrically insulated thin wires which exit the fiber composite almost perpendicularly to the laminate layers, so that the fibers of the fiber composite component are not severed by the leading-out of the feed lines, but are slightly pushed apart.

Claims

1. A fiber composite structure having laminate layers, with a piezoelectric actuator or sensor integrated therein, wherein:

electric feed lines for the actuator or sensor comprise electrically insulated thin wires;

said wires exit the fiber composite almost perpendicularly to the laminate layers, whereby fibers of the fiber composite structure are not severed by exiting of the feed lines, but are rather slightly pushed apart.

2. The fiber composite according to claim 1, wherein the feed lines have a diameter of less than 1 mm.

3. The fiber composite according to claim 2, wherein the feed lines have a diameter of less than 0.5 mm.

4. The fiber composite according to claim 1, wherein the feed lines are guided within the fiber composite in sections parallel to the laminate layers.

5. The fiber composite according to claim 2, wherein the feed lines are guided within the fiber composite in sections parallel to the laminate layers.

6. The fiber composite according to claim 1, wherein the wires are fastened on the actuator or sensor by one of a conductive adhesive and a solder.

7. The fiber composite according to claim 1, wherein insulation of contact points between the actuator or sensor and the electric feed lines is provided by one of an epoxy resin, an insulating varnish or an insulating polyimide foil.

8. The fiber composite according to claim 1, wherein recesses for the actuator or sensor are provided in the laminate layers.

9. The fiber composite according to claim 1, wherein the actuator or sensor is integrated between two successive laminate layers without recesses.