[특허]Pressure wave generator and controller for generating a pressure wave in a liquid medium

Pressure wave generator and controller for generating a pressure wave in a liquid medium 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16B-021/12 G10K-015/04 F03G-007/00 G21B-003/00 F15B-021/12 B01J-003/08
출원번호	US-0643792 (2009-12-21)
등록번호	US-10002680 (2018-06-19)
발명자 / 주소	Laberge, Michel Georges Gelbart, Daniel Hill, Ross Henry Connor, Denis J.
출원인 / 주소	General Fusion Inc.
대리인 / 주소	Knobbe, Martens, Olson & Bear, LLP
인용정보	피인용 횟수 : 0 인용 특허 : 87

초록 ▼

An apparatus for generating a pressure wave in a liquid medium is disclosed. The apparatus includes a plurality of pressure wave generators having respective moveable pistons, the pistons having respective control rods connected thereto. The apparatus also includes a plurality of transducers coupled to the liquid medium and means for causing the pistons of respective ones of the plurality of the pressure wave generators to be accelerated toward respective ones of the plurality of transducers. The apparatus further includes means for causing restraining forces to be applied to respective control rods to cause respective pistons to impact respective transducers at respective desired times and with respective desired amounts of kinetic energy such that the respective desired amounts of kinetic energy are converted into a pressure wave in the liquid medium.

대표청구항 ▼

1. A pressure wave generator for generating a pressure wave in a liquid medium, the pressure wave generator comprising: a movable piston;a control rod coupled to the piston;a transducer configured to be coupled to the liquid medium;a housing having an inner bore, a first end, and a second end, the movable piston and at least a portion of the control rod disposed in the inner bore of the housing, the transducer slideably accommodated in an opening at the second end of the housing, the inner bore comprising a first cavity between the first end and the movable piston and a second cavity between the movable piston and the transducer, wherein the first cavity is configured to receive a fluid for applying fluid pressure to the movable piston to accelerate the movable piston toward the transducer, and wherein the movable piston is configured to move within the second cavity toward the transducer;a position sensor configured to generate a position signal representing a position of the movable piston;a controller operatively coupled to the position sensor, wherein the controller is configured to generate a control signal based at least in part on the position signal; anda brake operatively coupled to the controller, the brake configured to apply a restraining force to the control rod in response to the control signal such that the movable piston impacts the transducer at a desired time and with a desired kinetic energy,wherein the movable piston and the transducer are configured to convert part of the desired kinetic energy of the movable piston into a pressure wave in the liquid medium upon impact of the movable piston with the transducer. 2. The pressure wave generator of claim 1, wherein the second cavity is configured to be at least partially evacuated. 3. The pressure wave generator of claim 1, further comprising a latch coupled to at least one of the control rod and the movable piston, the latch configured to hold the movable piston stationary in presence of fluid pressure on the movable piston. 4. The pressure wave generator of claim 1, wherein the position sensor comprises an optical sensor. 5. The pressure wave generator of claim 4, wherein the control rod comprises a plurality of indicia and the optical sensor is configured to detect reflected light from at least some of the indicia, whereby the position signal of the position sensor is determined based at least in part on the reflected light. 6. The pressure wave generator of claim 1, wherein the brake comprises a magnetic field generator configured to establish a magnetic field that generates eddy currents in the control rod when the control rod moves with respect to the magnetic field generator, thereby providing the restraining force on the control rod. 7. The pressure wave generator of claim 6, further comprising a second brake configured to provide a holding force on at least one of the movable piston or the control rod when the control rod is at rest with respect to the housing. 8. The pressure wave generator of claim 6, wherein the magnetic field generator comprises a magnetic core configured to provide the magnetic field in response to a braking control signal, the magnetic core comprises a gap, and the control rod is moveably positioned in the gap. 9. The pressure wave generator of claim 1, wherein the controller is configured to generate the control signal based at least in part on the movable piston position and a desired position of the movable piston. 10. The pressure wave generator of claim 9, wherein the brake and controller are configured to increase and decrease the restraining force to control a velocity of the movable piston. 11. The pressure wave generator of claim 9, wherein the controller is configured to increase the restraining force applied by the brake if the movable piston position is ahead of the desired position of the movable piston, and reduce the restraining force applied by the brake if the movable piston position is behind the desired position of the movable piston.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Pressure wave generator and controller for generating a pressure wave in a liquid medium 원문보기

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Pressure wave generator and controller for generating a pressure wave in a liquid medium 원문보기

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연구과제 타임라인

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