Abstract:
Schallwandleranordnung (100, 200, 300, 400, 500) mit mindestens zwei piezoelektrischen Ultraschallwandlern (103, 203, 303, 403, 503), wobei jeder piezoelektrische Ultraschallwandler (103, 203, 303, 403, 503) eine erste Seite umfasst, die eine erste Verbindungsschicht (108, 208, 308, 408, 508) aufweist und eine der ersten Seite gegenüberliegende zweite Seite umfasst, die eine zweite Verbindungsschicht (109, 209, 309, 409, 509) aufweist, wobei die erste Verbindungsschicht (108, 208, 308, 408, 508) auf einem Trägerelement (105, 205, 305) angeordnet ist, wobei oberhalb der zweiten Verbindungsschicht (109, 209, 309, 409, 509) eine Membranschicht (101, 201, 301, 401, 501) angeordnet ist, die bereichsweise als Membran fungiert, wobei zwischen zwei piezoelektrischen Ultraschallwandlern (103, 203, 303, 403, 503), dem Trägerelement (105, 205, 305) und der Membranschicht (101, 201, 301, 401, 501) erste Zwischenräume (106, 206, 306, 406, 506) sind und Dämpfungsmaterial die ersten Zwischenräume (106, 206, 306, 406, 506) mindestens teilweise verfüllt.
Abstract:
An ultrasound transducer and a method of making this transducer, where the transducer includes at least two piezoelectric elements, oriented adjacent to each other in a stack. Each piezoelectric element includes a first surface which includes an electrode of a first polarity, a second surface which includes an electrode of a second polarity, a thickness between the first surface and the second surface, and an ultrasound transmitting surface. This surface does not include an electrode. The transducer also includes a first electrical connection between a surface of a first of the at least two piezoelectric elements of the first polarity and a surface of a second of the at least two piezoelectric elements of the first polarity and a second electrical connection between a surface of a first of the at least two piezoelectric elements of the second polarity and a surface of a second of the at least two piezoelectric elements of the second polarity.
Abstract:
A transducer with triangular cross-sectional shaped pillars is described for suppressing lateral modes within a composite, and a method for producing the same. According to one aspect of the present application, a plurality of triangular cross- sectional shaped pillars extends outwardly from a substrate and form an array of pillars. The resulting array of pillars is configured to suppress the lateral modes of the transducer at higher operating frequencies, such as, at or above 15MHz, at or above 20 MHz, or at or above 30MHz.
Abstract:
Ultrasound probes that transmits/receives ultrasound pulses with frequencies both in a low frequency (LF) and a high frequency (HF) band, where the radiation surfaces of said HF and LF bands at least have a common region. Several solutions for transmission (and reception) of LF and HF pulses through the same radiation surface are given. The arrays and elements can be of a general type, for example linear phased or switched arrays, or annular arrays or elements with division in both azimuth and elevation direction, like a 1.5D, a 1.75D and a full 2D array. The LF and HF element division and array apertures can also be different.
Abstract:
Embodiments provide an ultrasound transducer. The ultrasound transducer may include a multi-layered membrane having a plurality of slits extending through the membrane, thereby forming a plurality of sections of the membrane at least partially separated by the slits. Each slit extends from a perimeter of the membrane to a respective end position at a predetermined distance away from a center of the membrane. The plurality of sections of the membrane are connected to each other at the center of the membrane.
Abstract:
Methods and systems of wide-angle ultrasound transducers that receive or transmit over a wide angular range are disclosed. In one embodiment, the transducer includes an aperture that includes multiple piezoelectric segments sequentially arranged based on a quasi- random sequence that has high autocorrelation at zero-shift and low autocorrelation at non¬ zero shifts, such as one of the known Barker sequences. The transducer may be in the shape of a cylinder or in a strip, and multiple piezoelectric segments may be arranged in various sequential arrangements such that the autocorrelation of the aperture of the transducer has high autocorrelation at zero-shift and low autocorrelation at non-zero shifts. Methods of making and using the wide-angle transducer in an ultrasound imaging system are also disclosed.
Abstract:
본 발명은 단위 초음파 프로브, 초음파 프로브 모듈 및 초음파 프로브 장치에 관한 것이다. 본 발명에 따른 단위 초음파 프로브는단위 초음파 프로브는 후면 블럭부; 상기 후면 블럭부의 상면에 배치되는 연성기판부; 및 상기 연성기판부의 상면에 배치되어 상기 연성기판부와 전기적으로 접속되고, 상기 후면 블럭부보다 작은 사이즈로 형성되며, 초음파를 발생시키는 압전 웨이퍼를 포함하며, 본 발명에 따른 초음파 프로브는 횡 방향으로 압전 웨이퍼의 개수를 증가시키더라도 압전웨이퍼를 포함하는 단위 초음파 프로브를 적층시켜 채널을 증가시키기 때문에, 연성기판의 구조가 복잡해져 가격이 기하급수적으로 증가하는 것을 방지할 수 있다.
Abstract:
A multi-layer transducer operates with only one system channel (24) per element (12). Passive switching connects the layers (14, 16) differently for transmit than for receive operation, such as connecting two layers (14, 16) in parallel for transmit and in series for receive. Any passive switching may be used, such as current and voltage limiting circuits (26, 28, 30). Tuning may be passively switched. Different tuning circuits (70, 72, 82, 84) are passively switched as a function of voltage level between transmit and receive operations.