JP7101866B2 - 車両用の危険識別のための1d超音波変換器ユニット - Google Patents
車両用の危険識別のための1d超音波変換器ユニット Download PDFInfo
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- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
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- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
- B06B1/0622—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements on one surface
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- G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
- G01N29/348—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with frequency characteristics, e.g. single frequency signals, chirp signals
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- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
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- G—PHYSICS
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- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/26—Sound-focusing or directing, e.g. scanning
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- G10K11/346—Circuits therefor using phase variation
Description
さらなる超音波変換器が、欧州特許出願公開第0940801号明細書、並びに、Eric Konetzke等著「Phased array transducer for emitting 40 kHz air-coupled ultrasound without grating lobes」(IEEE International Ultrasonic Symposium, 2015年, 1~4頁)、及び、Jaeger等著「Air-coupled 40-kHz ultrasonic 2D-phased array based on a 3D-printed waveguide structure」(IEEE International Ultrasonic Symposium, 2017年, 1~4頁)、及び、Takahashi等著「Ultrasonic phased array sensor for electrical travel aids for visually impaired people」(Proceedings of the spie -The international society for optical engineering spie - vertical-cavity surface-emitting lasers XIII,第6794巻,2007年12月3日 67943V頁, ISSN: 0277-786X)、及び、Manufactoring Murata「Ultrasonic Sensor Application Manual」(Cat. No. S15E-5,2009年1月1日, URL;https://cdn-reichelt.de/documents/datenblatt/8400/ultraschall%20sensor.pdf, 3頁)から知られている。
Claims (8)
- ハウジング(14)と、少なくとも3つの超音波変換器(12)と、制御ユニットとを含む、車両(100)用の危険識別のための1D超音波変換器ユニット(10)であって、
・前記制御ユニットは、各超音波変換器(12)を個別に駆動制御するように設計されており、
・各超音波変換器(12)はそれぞれ、変換器ハウジング(18)と、前記変換器ハウジング(18)内に配置されている圧電体と、気体状の媒質への分離のために前記変換器ハウジング(18)の開放端部に配置されている音響分離層(20)とを有しており、かつ、前記ハウジング(14)内の固定の位置に配置されており、
・各超音波変換器(12)は、一致する動作周波数を有する音波を放射し及び/又は受け取るように設計されており、
・前記音波の前記動作周波数は、20kHz~400kHzの範囲にあり、
・互いに直接的に隣接する2つの超音波変換器(12)はそれぞれ、前記ハウジング(14)内で、最大10cm又は最大5cm又は最大2cmの、前記音響分離層(20)の中心から前記音響分離層(20)の中心までの間隔(A1)を有しており、
・前記1D超音波変換器ユニット(10)は、超音波変換器(12)毎に1つの音響チャネル(22)を有しており、
・各音響チャネル(22)は、入口開口部(24)と出口開口部(26)とを有しており、
・各音響分離層(20)には、厳密に前記複数の入口開口部(24)のうちの1つが割り当てられており、
・前記出口開口部(26)は、直線に沿って配置されており、
・前記出口開口部(26)はそれぞれ、前記ハウジング(14)の第1の壁部に配置されており、又は、前記音響チャネル(22)は、前記車両(100)に接していない、前記ハウジング(14)の壁部を貫通しており、
・複数の前記出口開口部(26)のうちの1つの出口開口部の中心から、直接的に隣接する出口開口部(26)の中心までの間隔(A2)は、最大で、気体状の媒質における波長に相当し、又は、最大で、気体状の媒質における波長の半分に相当し、
・直接的に隣接する2つの出口開口部(26)間の前記間隔(A2)はそれぞれ、対応する前記入口開口部(24)に割り当てられている前記超音波変換器(12)間の前記間隔(A1)よりも短く、
・前記入口開口部(24)の面積に対する前記出口開口部(26)の面積の比は、0.30~1.2の間の値を有しており、
・各音響チャネル(22)は、少なくとも、前記入口開口部(24)の直径に相当する長さを有している、
1D超音波変換器ユニット(10)において、
・前記ハウジング(14)は、前記車両(100)に取り付けられており、
・前記ハウジング(14)は、可動の被覆装置(32)を有しており、前記被覆装置(32)は、すべての音響チャネル(22)の前記出口開口部(26)を閉鎖するように設計されており、
・すべての音響チャネル(22)の前記出口開口部(26)は、湾曲した面(F1)にある、
ことを特徴とする1D超音波変換器ユニット(10)。 - 前記入口開口部(24)の面積に対する前記出口開口部(26)の面積の比は、0.5~1.5の間又は0.9~1.1の間の値を有している、
請求項1に記載の1D超音波変換器ユニット(10)。 - 各音響チャネル(22)は、各超音波変換器(12)の前記音響分離層(20)から、割り当てられている前記音響チャネル(22)の前記出口開口部(26)までの長さ(L1)を有しており、前記長さ(L1)は、音響周波数の波長の8分の1の整数倍又は前記音響周波数の半波長の整数倍である、
請求項1又は2に記載の1D超音波変換器ユニット(10)。 - 各音響チャネル(22)は、金属若しくはプラスチックから成る、又は、金属若しくはプラスチックを含む、
請求項1から3までのいずれか1項に記載の1D超音波変換器ユニット(10)。 - 各超音波変換器(12)は、前記音響分離層(20)と前記変換器ハウジング(18)との間に音響減結合層(28)を有している、
請求項1から4までのいずれか1項に記載の1D超音波変換器ユニット(10)。 - 前記制御ユニットは、完全に又は部分的に、前記ハウジング(14)内に配置されている、
請求項1から5までのいずれか1項に記載の1D超音波変換器ユニット(10)。 - 前記1D超音波変換器ユニット(10)の前記ハウジング(14)は、少なくともIP40保護等級に従って形成されている、
請求項1から6までのいずれか1項に記載の1D超音波変換器ユニット(10)。 - 前記ハウジング(14)は、測定信号及び/又は制御信号を伝送するための少なくとも1つの信号インタフェースを有している、
請求項1から7までのいずれか1項に記載の1D超音波変換器ユニット(10)。
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DE102018006130.3A DE102018006130B3 (de) | 2018-08-03 | 2018-08-03 | 1D-Ultraschallwandler-Einheit zur Gefahrenerkennung für ein Fahrzeug |
PCT/EP2019/000165 WO2020025158A1 (de) | 2018-08-03 | 2019-05-23 | 1d-ultraschallwandler-einheit zur gefahrenerkennung für ein fahrzeug |
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DE102021212355A1 (de) | 2021-11-03 | 2023-05-04 | Robert Bosch Gesellschaft mit beschränkter Haftung | Ultraschallbasiertes Sensorsystem mit veränderbarem Erfassungsbereich |
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JP2009264872A (ja) | 2008-04-24 | 2009-11-12 | Nippon Soken Inc | 物体検出装置 |
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Title |
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KONETZKE Eric et al.,Phased array transducer for emitting 40-kHz air-coupled ultrasound without grating lobes,2015 IEEE International Ultrasonics Symposium (IUS),IEEE,2015年,pages 1-4 |
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US11808850B2 (en) | 2023-11-07 |
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EP3807633B1 (de) | 2022-11-16 |
DE102018006130B3 (de) | 2019-08-08 |
JP2021532369A (ja) | 2021-11-25 |
EP3807633A1 (de) | 2021-04-21 |
US20210156996A1 (en) | 2021-05-27 |
WO2020025158A1 (de) | 2020-02-06 |
KR20210027399A (ko) | 2021-03-10 |
KR102447349B1 (ko) | 2022-09-23 |
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