Electroacoustic transducer

• US 10,419,856 B2
• Filed: 03/28/2017
• Issued: 09/17/2019
• Est. Priority Date: 04/12/2016
• Status: Active Grant

• Current Assignee: BAE Systems Plc
• Original Assignee: BAE Systems Plc
• Inventors: Kent, Lionel William John
• Primary Examiner(s): Ensey, Brian
• Application Number:
  US16/093,514
• Publication Number:
  US 20190215613A1
• Time in Patent Office: 903 Days
• CPC Class Codes: H04B 11/00 Transmission systems employing sonic, ultrasonic or infrasonic waves
• CPC Class Codes: H04R 17/00 Piezoelectric transducers; Electrostrictive transducers piezoelectric or electrostrictive elements in general H10N30/00; details of piezoelectric or electrostrictive motors, generators or positioners H10N30/00
• CPC Class Codes: H04R 3/00 Circuits for transducers , loudspeakers or microphones

Abstract

According to the present invention, there is provided an electroacoustic transducer, comprising: a first electrode; a second electrode; a piezoelectric material at least partially sandwiched between the first electrode and the second electrode; and a flexible electrical connector in electrical connection with the first or second electrode at discrete points around a periphery of that electrode, the discrete points being distributed about a substantial portion of that periphery.

Claims

1. An electroacoustic transducer, comprising:

a first electrode;

a second electrode;

a piezoelectric material at least partially sandwiched between the first electrode and the second electrode; and

a flexible electrical connector in electrical connection with the first or second electrode at discrete points around a periphery of that electrode, the discrete points being distributed about a substantial portion of that periphery.

2. The electroacoustic transducer of claim 1, wherein the flexible electrical connector has a stress relieving geometry at and/or between the discrete points.

3. The electroacoustic transducer of claim 1, wherein the flexible electrical connector generally extends around and is spaced apart from the first or second electrode, except at the discrete points, where the flexible connector extends inwardly toward the first or second electrode.

4. The electroacoustic transducer of claim 1, wherein the flexible electrical connector is shaped to have a spring-like, or planar spring-like, structure or geometry at and/or between the discrete points.

5. The electroacoustic transducer of claim 1, wherein the flexible electrical connector comprises one or more kinematic hinges.

6. The electroacoustic transducer of claim 1, wherein the flexible connector comprises a first portion that extends around a substantial portion of the periphery of the first or second electrode, and one or more second portions that meet and extend away from the first portion and arranged to facilitate the delivery of electrical power to/from the first portion, and wherein the first portion has a smaller cross-sectional area, or is thinner, or is narrower, further from the meeting location or locations than it is at or more adjacent to the meeting location or locations.

7. The electroacoustic transducer of claim 1, wherein the first or second electrode at least partially wraps around the piezoelectric material, such that a portion of the second electrode and the first electrode are located on a same side of the piezoelectric material.

8. The electroacoustic transducer of claim 1, further comprising an optical aperture extending through the electroacoustic transducer, to allow for optical communication to take place through the electroacoustic transducer.

9. A system, comprising a first the electroacoustic transducer of claim 1, wherein the electroacoustic transducer is utilized as a power transmitter, a data transmitter, a power receiver, or a data receiver.

10. The system of claim 9, wherein the first or second electrode of the electroacoustic transducer is bonded to a solid transmission medium, via which medium power and/or data can be transmitted and/or received by the first electroacoustic transducer.

11. The system of claim 10, wherein the electroacoustic transducer is a first electroacoustic transducer, the system further comprising a second electroacoustic transducer, the first or second electrode of each of the first and second electroacoustic transducers being bonded to substantially opposite ends or sides of the solid transmission medium, to allow for acoustic power and/or data transmission between the first and second electroacoustic transducers via the solid transmission medium.

12. The system of claim 11, comprising first and second electroacoustic controllers associated with, respectively, the first and second electroacoustic transducers, for:

controlling the first or second electroacoustic transducer to generate an acoustic signal, for transmitting power and/or data to the second or first electroacoustic transducer, via the solid transmission medium, using that signal; and

/or

receiving power and/or data from the first or second electroacoustic transducer as a result of the first or second electroacoustic transducer receiving that signal.

13. The system of claim 10, comprising first and second optical controllers associated with, respectively, the first and second electroacoustic transducers, for optically transmitting/receiving data between the first and second optical controllers, the transmission/reception being through the solid transmission medium which is also substantially transparent to the transmission of optical signals, and through an optical aperture extending through each of the first and second electroacoustic transducers.

14. The system of claim 10, wherein the solid transmission medium extends through a barrier, from one side to another, and wherein the barrier is an electrical insulator and/or is optically opaque.

19. The system of claim 9 wherein the system is a power system.

20. The system of claim 9 wherein the system is a data communication system.

15. A method of transmitting or receiving data and/or power using an electroacoustic transducer, the method comprising:

generating or receiving an acoustic signal using the transducer, in order to transmit or receive data and/or power using that acoustic signal,

wherein the transducer comprises a flexible electrical connector in electrical connection with an electrode of the transducer, around a substantial portion of a periphery of that electrode, wherein the flexible electrical connector is in electrical connection with the electrode at discrete points around a substantial portion of the periphery of that electrode.

16. The method of claim 15, wherein the flexible electrical connector generally extends around and is spaced apart from the electrode, except at the discrete points, where the flexible connector extends inwardly toward the electrode.

17. The method of claim 15, wherein the flexible electrical connector comprises one or more kinematic hinges.

18. The method of claim 15, wherein the electroacoustic transducer is a first electroacoustic transducer that operates in conjunction with a second electroacoustic transducer, the method further comprising:

controlling the first electroacoustic transducer to generate the acoustic signal, for transmitting power and/or data to the second electroacoustic transducer, via a solid transmission medium, using that acoustic signal; and

/or

receiving power and/or data from the second electroacoustic transducer as a result of the second electroacoustic transducer receiving that acoustic signal.