[미국특허]
Apparatus for directing particles in a fluid
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01N-015/06
G01N-029/00
H04B-017/00
출원번호
US-0527887
(2003-03-18)
등록번호
US-7373805
(2008-05-20)
우선권정보
GB-0221391.6(2002-09-16)
국제출원번호
PCT/GB03/001125
(2003-03-18)
§371/§102 date
20050818
(20050818)
국제공개번호
WO04/024287
(2004-03-25)
발명자
/ 주소
Hawkes,Jeremy John
Long,Michael J
Coakley,William Terence
McDonnell,Martin Bernard
출원인 / 주소
The Secretary of State for Defence
대리인 / 주소
Russell,Dean W.
인용정보
피인용 횟수 :
68인용 특허 :
5
초록▼
There is disclosed apparatus for directing particles entrained in a fluid, comprising a chamber having a first wall, including means for generating a sound wave having a frequency v, and a second, opposite wall capable of reflecting the sound wave in which the first and second wall define a conduit
There is disclosed apparatus for directing particles entrained in a fluid, comprising a chamber having a first wall, including means for generating a sound wave having a frequency v, and a second, opposite wall capable of reflecting the sound wave in which the first and second wall define a conduit for the passage of the fluid, and in which the thickness of the second wall is such that the path length of the standing wave in the second wall is a multiple of about �� the wavelength λr of the sound wave therein.
대표청구항▼
The invention claimed is: 1. Apparatus for directing particles entrained in a fluid, comprising a chamber having a first wall, including means for generating a sound wave having a frequency v, and a second, opposite wall capable of reflecting the sound wave in which the first and second walls defin
The invention claimed is: 1. Apparatus for directing particles entrained in a fluid, comprising a chamber having a first wall, including means for generating a sound wave having a frequency v, and a second, opposite wall capable of reflecting the sound wave in which the first and second walls define a conduit for the passage of the fluid, and in which the thickness of the second wall is such that the path length of the standing wave in the second wall is a multiple of about �� the wavelength λt of the sound wave therein. 2. Apparatus according to claim 1, in which the first wall further comprises a coupling layer. 3. Apparatus according to claim 2, in which the width of the conduit is a multiple of �� or �� for the wavelength λf of the sound wave in the fluid. 4. Apparatus according to claim 3, in which the thickness of the material transmitting the sound wave in the first wall is a multiple of �� or �� of the wavelength λt of the sound wave therein. 5. Apparatus according to claim 1, in which the thickness of the material capable of generating the sound wave is an odd multiple of �� of the wavelength λg of the sound wave therein. 6. Apparatus according to claim 1, in which the total acoustic path length of the wave is a multiple of �� of the wavelength of the sound wave λ therein. 7. Apparatus according to claim 1, in which the material capable of generating the sound wave is a piezoceramic. 8. Apparatus according to claim 7, in which the frequency v of the sound wave is at or adjacent the resonant frequency of the piezoceramc material. 9. Apparatus according to claim 1, in which the second wall comprises glass, steel, carbon or silicon. 10. Apparatus according to claim 1, in which the material in the first wall capable of transmitting the sound wave comprises steel, carbon or silicon. 11. Apparatus according to claim 1, in which the sound wave is an ultrasound wave. 12. Apparatus according to claim 1, further comprising detection means for detecting particles at or adjacent the first and/or second walls. 13. Apparatus according to claim 12, in which the detection means comprise a biological sensing medium. 14. Apparatus according to claim 13, in which the sensing medium comprises one or more antibodies or lectins. 15. Apparatus according to claim 12, in which the second wall is removable. 16. Apparatus according to claim 12, in which the second wall and the sensing medium comprise a surface plasmon resonance or a metal leaky waveguide chip. 17. Apparatus according to claim 16, in which the detection means further comprise means providing light incident the second wall and means detecting a change in the angle thereof required for resonance or optical coupling. 18. Apparatus according to claim 16, in which the detection means further comprise means detecting light scattered or emitted from the particles. 19. A method of detecting particles in a fluid comprising the steps of i) passing the fluid through a chamber comprising a first wall including means for generating a sound wave of frequency v and a second, opposite wall capable of reflecting the sound wave which together define a conduit for the passage of the fluid and detection means for detecting particles at the first and/or second walls, ii) selecting the frequency v such that the path length of the standing wave in the second wall is a multiple of about �� of the wavelength λt of the sound wave therein and iii) detecting the particles. 20. A method according to claim 19, in which the width of the conduit is a �� of the wavelength λf of the sound wave in the fluid. 21. A method according to claim 19, in which the detection step is preceded by the removal of the second wall from the chamber.
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