Broadband Ultrasonic Transducer Composite Mechanism to Meet Multi-frequency Requirements
An ultrasonic transducer and wide-band technology, which is applied in the direction of fluid using vibration, can solve the problem of limited single function of the ultrasonic sensor, and achieve the effect of improving clarity and increasing bandwidth
Active Publication Date: 2017-10-10
HENAN UNIVERSITY
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Problems solved by technology
) Previous ultrasonic sensors were limited to a single function, or used for medical imaging, or for medical treatment, etc.
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[0019] Such as figure 1 and figure 2 As shown, the present invention includes the bottom first electrode layer, insulating layer 5, low frequency, high frequency cavity layer, insulating elastic vibrating film layer and second electrode layer arranged in sequence from bottom to top, the first electrode layer adopts the first Electrode sheets 6, the upper surface of the first electrode sheet 6 is connected to the lower surface of the insulating layer 5, the low-frequency and high-frequency cavity layers include a low-frequency insulating support plate 2 and a high-frequency insulating support body 3 of a frame structure, and the low-frequency insulating support plate The lower surface of 2 is connected to the upper surface of the insulating layer 5, the upper surface of the low-frequency insulating support plate 2 is connected to the lower surface of the insulating elastic vibrating film layer, and the low-frequency insulating supporting plate 2 is provided with a row of verti...
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The invention discloses a compound mechanism of a wide-band ultrasonic transducer satisfying multi-frequency requirements, which comprises a first electrode layer at the bottom, an insulating layer, a low-frequency and high-frequency cavity layer, and an insulating elastic vibrating film arranged sequentially from bottom to top. Layer and the second electrode layer, and constitute an integral composite mechanism, in the composite mechanism, a row of through grooves provided on the low-frequency insulating support plate, the insulating layer and the insulating elastic vibrating film layer form a low-frequency vacuum chamber, through each A low-frequency vacuum chamber, the second electrode sheet above, and the first electrode sheet below constitute an independent unit structure, which can be freely controlled; by controlling the independent unit structure, the independent unit structure can work at high frequencies It can also work in the low frequency state, and can be controlled in time division, providing a wide range of bandwidth and meeting the needs of different frequencies, so it can be applied to occasions with multi-frequency requirements.
Description
technical field [0001] The invention relates to the technical field of micro-electromechanical systems with energy conversion, in particular to a compound mechanism of a broadband ultrasonic transducer meeting multi-frequency requirements. Background technique [0002] Modern medical imaging technologies include ultrasound imaging, X-CT tomographic imaging, radioisotope scanning imaging and nuclear magnetic resonance. Among them, ultrasonic imaging technology has good real-time performance, no ionizing radiation and other performances, no damage to the human body within the power range of diagnostic applications, reusable, low cost, and easy to carry, so it has been widely used. In particular, it has a strong ability to identify biological soft tissues, and has advantages in the diagnosis of soft tissue diseases, such as being able to display cross-sectional views, obtain blood flow information, real-time dynamic imaging of abnormal organs, heart and blood flow, etc. Ultras...
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IPC IPC(8): B06B1/02
Inventor 张培玉李妍
Owner HENAN UNIVERSITY