Protective housing for ultrasonic transducer apparatus

• US 6,800,987 B2
• Filed: 01/22/2003
• Issued: 10/05/2004
• Est. Priority Date: 01/22/2002
• Status: Expired due to Term

• Current Assignee: Measurement Specialties Incorporated (TE Connectivity Limited)
• Original Assignee: Measurement Specialties Incorporated (TE Connectivity Limited)
• Inventors: Toda, Minoru
• Primary Examiner(s): Dougherty, Thomas M.
• Application Number:
  US10/349,483
• Publication Number:
  US 20040000838A1
• Time in Patent Office: 622 Days
• Field of Search: 310/311, 310/334, 310/348, 310/369
• US Class Current: 310/348
• CPC Class Codes: G10K 9/22 Mountings; Casings
• CPC Class Codes: H10N 30/88 Mounts; Supports; Enclosures; Casings

Abstract

A protective cover or grid for an ultrasound transducer comprises a series of vertically spaced members separated from one another by a pre-determined distance, each member being of substantially uniform width and arranged in a cylindrical shape. The protection grid includes a cavity for receiving a cylindrical transducer. The protection grid operates as both a physical protection mechanism for protecting the cylindrical transducer housed therein as well as operating as an impedance matching device.

Claims

1. A housing for an ultrasound transducer comprising:

a base portion having an opening for receiving the ultrasound transducer; and

a cylindrical portion extending from said base portion for surrounding the ultrasound transducer;

said cylindrical portion comprising a plurality of slots disposed about said cylindrical portion for passing ultrasound radiation, said plurality of slots arranged in a predetermined fashion and spaced apart from one another such that the total area of said plurality of slots is about 55% of the area of said cylindrical portion, whereby said cylindrical portion operates as an impedance matching layer with the ultrasound radiation for increasing the sensitivity or output transmission of the transducer.

2. The housing according to claim 1, wherein the cylindrical portion comprises a plurality of elongate members extending vertically from the base portion and uniformly disposed about the base portion in cylindrical fashion, each said elongate member separated from one another by a corresponding one of said plurality of slots.

3. The housing according to claim 2, further comprising a top portion opposite said base portion and coupled to ends of said plurality of elongate members.

4. The housing according to claim 3, wherein said top portion comprises a disc shaped member having an aperture formed therein and a circumferentially extending side surface to which said plurality of elongate members are coupled.

5. The housing according to claim 2, wherein the width of each elongated member is about 1.5 mm.

6. The housing according to claim 2, wherein the housing comprises a flexible plastic material.

7. The housing according to claim 1, wherein the slots comprise holes formed on a wall surface defining said cylindrical portion.

8. The housing according to claim 7, wherein the holes are of uniform size and uniformly disposed about the wall surface.

9. The housing according to claim 8, wherein the thickness of the wall surface is about 1 mm and wherein an inner diameter of the cylindrical portion is about 12.9 mm.

10. A housing for an ultrasound transducer comprising:

a plurality of elongate members disposed in cylindrical fashion and interconnected to form a cylinder having an opening for receiving said ultrasound transducer, each elongate member separated from an adjacent one of said elongate members so as to define a slot therebetween, said plurality of slots arranged in predetermined fashion and spaced apart from one another such that said plurality of elongate members operate as an impedance matching layer for the ultrasound radiation for increasing the sensitivity or output transmission of the transducer.

11. The housing according to claim 10, wherein said plurality of slots are of uniform width.

12. The housing according to claim 10, wherein the housing is monolithic and comprises a flexible plastic material.

13. The housing of claim 10, wherein said plurality of elongate members comprises at least 12 said members.

14. In combination with an omnidirectional ultrasound transducer comprising a cylindrical piezoresponsive material operative for transmitting and/or receiving ultrasound signals in a direction normal to the piezoresponsive material at a predetermined resonance frequency, a housing surrounding said ultrasound transducer for providing environmental protection and enhancing signal transmission, said housing comprising a base portion having an opening for receiving the ultrasound transducer;

and a cylindrical portion extending from said base portion for surrounding the ultrasound transducer cylindrical piezoresponsive material;

said cylindrical portion comprising a plurality of slots disposed about said cylindrical portion for passing ultrasound radiation, said plurality of slots arranged in a predetermined fashion and spaced apart from one another such that the total area of said plurality of slots is about 55% of the area of said cylindrical portion, whereby said cylindrical portion operates as an impedance matching layer with the ultrasound radiation for increasing the sensitivity or output transmission of the transducer.

15. The combination according to claim 14, wherein said transducer includes a base portion supporting said cylindrically shaped piezoresponsive material, said transducer base portion engageable with said housing base portion for releasably securing said transducer within said housing.

16. The combination according to claim 14, wherein said housing is monolithic and comprises a flexible plastic material.

17. The combination according to claim 15, wherein said cylindrical portion comprises a plurality of elongate members extending vertically from the base portion and uniformly disposed about the base portion in cylindrical fashion, each said elongate member separated from one another by a corresponding one of said plurality of slots.

18. The combination according to claim 17, said housing base portion further comprising a securing member for snap in mounting of said transducer to a printed circuit board.