1d ultrasonic converter unit
A technology of ultrasonic transducer and control unit, which is applied in the directions of sound-producing equipment, generation of ultrasonic/sonic/infrasonic waves, instruments, etc., to achieve the effect of reducing the effective range and high power
Pending Publication Date: 2021-03-09
PEPPERL & FUCHS SE
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- Description
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- Application Information
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Problems solved by technology
[0012] This distance condition limits the size of the individual transducers or the frequency range possible with a certain design / size of the ultrasonic transducer.
Method used
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[0071] figure 1 A view showing a first embodiment of a one-dimensional ultrasound transducer unit 10 according to the invention comprising five ultrasonic transducers arranged along a line for sensing objects, contours or distances The transducers 12 and the control unit 14 , wherein the control unit 14 is designed to control each ultrasound transducer 12 individually.
[0072] In the illustrated embodiment, the ultrasonic transducers 12 are mounted in a common carrier structure 16 at equal intervals A1, wherein each ultrasonic transducer comprises a piezoelectric body 18, a housing containing the piezoelectric body 18 twenty two. Each ultrasound transducer 12 is designed to radiate and / or receive the same frequency, wherein the frequency is in the range of 20 kHz to 100 kHz.
[0073] exist Figure 2A In the illustration of FIG. 2 , a top view of a first embodiment of an ultrasound transducer 12 according to the invention is shown. The housing 22 of each ultrasound transdu...
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Abstract
The invention relates to a 1D ultrasonic converter unit having at least three ultrasonic converters and a control unit for individually controlling each ultrasonic converter, wherein each ultrasonic converter has a housing, a piezoelectric body and a sound decoupling layer for decoupling sound waves in a gaseous medium, is embedded in a common carrier structure and emits and / or receives the same frequency between 20 kHz and 400 kHz, every two adjacent ultrasonic converters have a maximum distance (AI) of 10 cm, the 1D ultrasonic converter unit (10) has, per ultrasonic converter, one sound channel having an input opening (38) associated with exactly one sound decoupling layer (26) and an output opening (40), the output openings are arranged along a line, a maximum distance (A2) between twoadjacent output openings (40) is equal to the whole or half the wavelength of the sound frequency and is smaller than the distance (AI) of the input openings (38) and a quotient of a surface area of the output opening to a surface area of the input opening has a value between 0.3 and 1.2.
Description
technical field [0001] The invention relates to a one-dimensional ultrasound transducer unit having at least three discrete, individually steerable ultrasound transducers for sensing objects, contours or distances. Background technique [0002] Ultrasound or ultrasonic transducers are widely used in various measurement components. Depending on the application, ultrasonic waves are coupled out into liquid or gaseous media. [0003] An array of ultrasonic transducers for use in gaseous media is known from WO 2008 / 135 004 A1. The array has a layered structure with an electret layer between two electrode structures, wherein each electrode structure includes a plurality of independently addressable electrode elements, thereby creating an electret layer local thickness vibrations. [0004] A 1.5-dimensional ultrasound transducer array with improved near-field resolution is known from US 2013 / 0283918 A1. Phased ultrasonic transducer arrays and adaptive or compensatory control m...
Claims
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IPC IPC(8): G01N29/24B06B3/00G01N29/26G01N29/28G01N29/34G10K11/22B06B1/06G01S7/521G01S15/42
CPCG01N29/262G01N29/2462G01N29/28G01N29/348G01N2291/106G10K11/22B06B1/0622G01S15/42G01S7/521G01F1/662G10K11/346
Inventor T·凯因德尔R·奥根施泰因M·库普尼克A·耶格尔M·鲁奇
Owner PEPPERL & FUCHS SE