液面位置検出装置

Japanese Patent JP7076072

B2

Provided is a liquid level position detection device having good precision of liquid level position detection. A liquid level position detection device is provided with a propagation body 10 in which the ratio of a portion thereof that is immersed in a liquid varies according to the liquid level position, a first transmitting/receiving part 21, a second transmitting/receiving part 22, and a detection part for detecting the liquid level position on the basis of the propagation time of a first surface wave W1 and/or a second surface wave W2. The propagation body 10 has a bottom surface part 16 which connects a main surface part 11 and a main surface part 12 and forms a curved surface shape in side view. The first transmitting/receiving part 21 generates a first surface wave W1 propagated through the main surface part 11, and the second transmitting/receiving part 22 receives the first surface wave W1 propagated through the bottom surface part 16 and the main surface part 12 via the main surface part 11. The second transmitting/receiving part 22 generates a second surface wave W2 propagated through the main surface part 12, and the first transmitting/receiving part 21 receives the second surface wave W2 propagated through the bottom surface part 16 and the main surface part 11 via the main surface part 12.

Emii Kogawa
Masahiro Watanabe

JP2020503385A

May 27, 2022

February 15, 2019

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Nippon Seiki Co., Ltd.

G01F23/296

JP2004028592A
JP2004117301A

US4920796
US4213337
WO1990010849A1

Kimura Mitsuru
Yuta Kobayashi
Kenro Shirai
Takuji Harada

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