Surface mountable piezoelectric shear sensor and accelerometer incorporating same
AssigneeMide Technology Corporation
InventorRob Carter
Life of this patent
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Abstract
A surface mountable piezoelectric sensor includes a pair of oppositely polarized, spaced, parallel piezoelectric members separated by an isolator. A first electrode is associated with the piezoelectric members bridging the isolator resulting in a series circuit when the pair of piezoelectric members are mounted to a printed circuit board. A second electrode is associated with one piezoelectric member and electrically isolated from a third electrode associated with the other piezoelectric member for surface mounting to the printed circuit board.
Claims22
A surface mountable piezoelectric sensor comprising:
- a pair of oppositely polarized, spaced, parallel piezoelectric members separated by an isolator;
- a first electrode associated with the piezoelectric members bridging the isolator resulting in a series circuit when the pair of piezoelectric members are mounted to a printed circuit board;
- a proof mass;
- and
- a second electrode associated with one piezoelectric member electrically isolated from a third electrode associated with the other piezoelectric member for surface mounting to the printed circuit board.
An accelerometer comprising:
- a printed circuit board;
- accelerometer circuitry connected via the printed circuit board to at least one of first and second spaced surface mount pads on the printed circuit board;
- and
- a surface mounted piezoelectric sensor including:
- first and second differently polarized piezoelectric members 6 separated by an isolator,
- a first electrode connecting the piezoelectric members across the isolator,
- a proof mass,
- a second electrode associated with the first piezoelectric member and surface mounted to one of the first and second spaced surface mount pads on the printed circuit board, and
- a third electrode associated with the second piezoelectric member and isolated from the second conductive electrode and surface mounted to the other of the first and second spaced surface mount pads on the printed circuit board.
A surface mountable piezoelectric sensor comprising:
- a pair of piezoelectric members separated by an isolator;
- a proof mass associated with the piezoelectric members;
- one piezoelectric member including a bottom negative terminal and the other piezoelectric member including a bottom positive terminal electrically isolated from the bottom negative terminal for surface mounting to a printed circuit board;
- and
- one piezoelectric member including a top positive terminal and the other piezoelectric member including a top negative terminal electrically connected to said top positive terminal.
A surface mountable piezoelectric sensor comprising:
- first and second piezoelectric members separated by an isolator;
- a proof mass associated with the piezoelectric members;
- the first piezoelectric member including a negative terminal and the second piezoelectric member including a positive terminal for surface mounting to a printed circuit board;
- and
- the first piezoelectric member including a positive terminal electrically connected to a negative terminal of the second piezoelectric member.
Dependencies are inferred from the claim text.