Title:
LIQUID SURFACE DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/104466
Kind Code:
A1
Abstract:
Provided is a liquid surface detection device capable of accurately detecting a liquid surface using ultrasound and without using a temperature sensor. A vibration generation means 2 generates a surface wave W1 on the surface of a propagation body 1 and generates an internal propagation wave W2 inside the propagation body 1. A vibration detection means 2 outputs a measurement signal by detecting the vibration of the surface wave W1 that has propagated through the propagation body 1 and been reflected and outputs a reference signal by detecting the vibration of the internal propagation wave W2 that has propagated through the propagation body 1 and been reflected. A position detection means 3 corrects a surface wave W1 propagation time determined from a drive signal and the measurement signal using an internal propagation wave W2 propagation time determined from the drive signal and the reference signal and detects a liquid surface LS.
Inventors:
ICHIMURA MASATOSHI
KOIDE SHIGEKI
SUZUKI HIROYUKI
KOIDE SHIGEKI
SUZUKI HIROYUKI
Application Number:
PCT/JP2015/085758
Publication Date:
June 30, 2016
Filing Date:
December 22, 2015
Export Citation:
Assignee:
NIPPON SEIKI CO LTD (JP)
International Classes:
G01F23/296
Foreign References:
| JPS5427149B2 | 1979-09-07 | |||
| JP4095960B2 | 2008-06-04 | |||
| JPH05231905A | 1993-09-07 |
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