Resonator for a vibratory sensor of an angular parameter

• US 8,490,485 B2
• Filed: 09/15/2009
• Issued: 07/23/2013
• Est. Priority Date: 09/16/2008
• Status: Active Grant

• Current Assignee: Safran Electronics & Defense
• Original Assignee: Sagem Defense Securite (Safran SA)
• Inventors: Vandebeuque, Paul, Jeanroy, Alain
• Primary Examiner(s): MacChiarolo, Peter
• Assistant Examiner(s): Shah, Samir M
• Application Number:
  US12/559,784
• Publication Number:
  US 20100083758A1
• Time in Patent Office: 1,407 Days
• Field of Search: 735/041.2, 735/041.3, 73/17.7, 735/040.2, 735/033, 735/040.8, 735/041.8, 735/141.5
• US Class Current: 73/504.13
• CPC Class Codes: G01C 19/5691 of essentially three-dimensional vibrators, e.g. wine glass-type vibrators

Abstract

A resonator for an angular parameter sensor, the resonator comprising a bell of electrically-insulating material provided with a central stem and an electrically-conductive layer, the conductive layer comprising branches extending from a central portion of the bell to a peripheral edge of the bell, the number of said branches being a prime number not less than seven.

Claims

1. A resonator for an angular parameter sensor, the resonator comprising:

a bell of electrically-insulating material provided with a central stem and an electrically-conductive layer, wherein the conductive layer comprises a number of branches extending from a central portion of the bell to a peripheral edge of the bell, said number of branches being a prime number not less than seven.

2. A resonator according to claim 1, wherein the conductive layer comprises seven branches.

3. A resonator according to claim 1, wherein the branches are of a width such that in the vicinity of the peripheral edge of the bell they present an area that is substantially equal to one-tenth of the area of the bell in the vicinity of the peripheral edge.

4. A resonator according to claim 1, wherein the conductive layer includes a portion covering at least a longitudinal portion of the stem.

5. A resonator according to claim 1, wherein the conductive layer includes an annular central portion.

6. A resonator according to claim 1, wherein the branches extend substantially along meridians of the bell.

7. A resonator according to claim 1, wherein the branches have parallel longitudinal edges.

8. A resonator according to claim 1, wherein the branches have longitudinal edges converging towards the peripheral edge of the bell.

9. A resonator according to claim 1, wherein the conductive layer is made of metal.

10. A resonator according to claim 9, wherein the metal is platinum.