Abstract:
An impedance matching apparatus is disclosed. The impedance matching apparatus according to an embodiment of the present invention comprises: a conversion part for converting a first signal received from the outside into a first converted signal and transmitting the first converted signal to a matching element array part or converting a second converted signal received from the matching element array part, into a second signal; the matching element array part through which the first converted signal and the second converted signal pass; an interface part for receiving the first converted signal from the matching element array part and transmitting the received first converted signal to an external device or receiving the second converted signal from an external device and transmitting the second converted signal to the matching element array part; an extraction part for extracting the signal information of the first converted signal and the signal information of the second converted signal from the first converted signal and the second converted signal passing through the matching element array part; and a calculation part for calculating a matching impedance value by using the signal information of the first converted signal and the signal information of the second converted signal. [Reference numerals] (202) Conversion part;(205) Matching element array part;(208) Extraction part;(210) Calculation part;(212) Conversion controller;(214) Signal information management database;(216) Array controller;(218) Interface part
Abstract:
Ultraschallwandler aufweisend, ein piezoelektrisches Wandlerelement mit einer Oberseite und einer Unterseite, und aufweisend ein becherförmiges Gehäuse, mit einer Oberseite und einer Unterseite, wobei an der Oberseite eine Öffnung ausgebildet ist, und aufweisend ein Koppelelement mit einer Vorderseite und einer Rückseite, wobei die Rückseite des Koppelelements mit der Oberseite des Wandlerelements akustisch verkoppelt ist, um in einem Sendemodus die mittels des Wandlerelements erzeugten Ultraschallwellen an die Umgebung auszukoppeln oder um in einem Empfangsmodus die aus der Umgebung von dem Koppelelement empfangenen Ultraschallwellen an das Wandlerelements weiterzuleiten, und wobei das Wandlerelement und das Koppelelement in dem Gehäuse angeordnet sind, und aufweisend eine erste Elektrode und eine zweite Elektrode, wobei die erste Elektrode mit einer an der Unterseite des Wandlerelements ausgebildeten Kontaktfläche verschaltet ist, wobei das Wandlerelement in einer becherartigen Abschirmvorrichtung aus einem metallisch leitfähigen Material angeordnet ist und die Öffnung der Abschirmvorrichtung mit einem metallischen leitfähigen Gitter überspannt ist, so dass die Abschirmvorrichtung und das Gitter einen Faraday'schen Käfig auszubilden, und das Gitter zwischen der Oberseite des Wandlerelements und der Rückseite des Koppelelements ausgebildet ist, und zwischen dem Gehäuse und der Abschirmvorrichtung ein Spalt ausgebildet und das Gehäuse von der Abschirmvorrichtung akustisch entkoppelt ist.
Abstract:
본 발명은 임피던스 매칭 장치로, 시스템으로부터 출력된 전송 펄스 및 상기 전송 펄스의 반사 수신 펄스가 통과하는 매칭 소자 어레이부와, 상기 펄스들로부터 펄스 정보를 추출하고, 상기 펄스 정보에 상응하는 임피던스값을 산출하고, 수신 펄스의 응답 특성이 가장 좋은 매칭 임피던스값으로 산출하는 추출/산출부; 상기 매칭 임피던스값에 따라 상기 매칭소자 어레이부를 라우팅하는 어레이 제어부; 상기 전송 펄스의 주파수를 캐리어 주파수로 변환하여 상기 매칭 소자 어레이부에 출력하는 제 1 변환부와; 상기 매칭 소자 어레이부에서 출력되는 캐리어 주파수를 저주파수로 변환하는 제 2 변환부; 및 상기 제 1 변환부 및 제 2 변환부의 주파수 변환을 제어하는 신호를 출력하는 변환 제어부를 포함한다.
Abstract:
There is provided a power supply indication circuit which may be adapted for use with a switched mode power supply or other constant voltage power supply. The circuit comprises a component for generating a signal indicating the power drawn from the power supply, a feedback portion for receiving the signal indicating the power drawn from the power supply, the feedback portion includes a signal generation component for generating a feedback signal, the feedback signal being used to adjust the power and current supplied to a component such as a high frequency agitation source drawing current from the power supply. The drive circuit is particularly suitable for use with a high frequency agitation source such as piezoelectric crystals.
Abstract:
Phacoemulsification apparatus includes a phacoemulsification handpiece having a needle and an electrical system for ultrasonically vibrating said needle along with a power source for providing pulsed electrical power source for providing pulsed electrical power to the handpiece electrical system. Irrigation fluid is provided to the handpiece needle and aspirating fluid is removed from the handpiece needle and aspirating fluid is removed from the handpiece needle. A determination of a voltage current phase relationship of the provided electrical power is made and in response thereto a control system varies a power level duty cycle provided to the handpiece electrical system from the power source and/or modify the aspiration flow rate. In addition, a separate input enables manual control of pulse amplitude and the control system in response to a selected amplitude determines a duty cycle of the provided pulsed electrical power.
Abstract:
The ultrasonic therapeutical treatment apparatus (1) comprises a first signal generator (6) delivering an alternating or rectified voltage (V1) at a ultrasound frequency; a second signal generator (7) delivering an alternating or rectified voltage (V2) at a sound frequency; and a treatment head (3) intended to be applied against a body region to be treated (5), comprising a piezoelectric transducer supplied by signals produced by the first and second generators. According to the invention, the apparatus is comprised of means (8) for summing the signals from the first and second generators in order to apply the thus combined signals to the transducer, the resonance frequency inherent to the transducer corresponding to the ultrasound frequency produced by the first generator, and the transducer being mounted in the head so as to produce, when the transducer is mounted in the head, a transducer resonance at a frequency corresponding to the sound frequency produced by the second generator, said resonance not being substantially affected by contacting the head with the body region to be treated.
Abstract:
An electrical apparatus for driving an ultrasonic piezoelectric crystal transducer in a surgical handpiece for the fragmentation and aspiration of tissue, which apparatus includes an electronic control loop (12) in combination with a voltage source amplifier (2) having an output which is connected to the piezoelectric crystal transducer (3) with a tuning inductor (4) in parallel. A control system for monitoring the control loop (12) and a component for controlling tissue selectivity are also disclosed.
Abstract:
The apparatus for frightening noxious animals comprises a programmable microprocessor (12) and an electro-acoustic transducer (21). The microprocessor (12) is directly or indirectly connected by means (14-20) to the acoustic signal emitting transducer. The microprocessor (12) and the means (14-20) are arranged so as to produce time variable acoustic signals which frighten noxious animals without disturbing human beings and domestic animals.
Abstract in simplified Chinese:根据本文所述例示性具体实施例所提供的是各具有第一电极之压致微机械超音波换能器(pMUT),该第一电极包括第一电极部与第二电极部。该第二电极部可与该第一电极部分别操作。第二电极与该第一电极隔开并且在该第一电极与该第二电极间界定空间。压电材料乃设置于该空间中。还提供的是pMUT之数组,其中个别pMUT具有可与数组诸列操作性联结之第一电极部、以及可与数组诸行操作性联结之第二电极部。