Title:
FLOW METER SENSOR
Document Type and Number:
WIPO Patent Application WO/2024/069718
Kind Code:
A1
Abstract:
Provided is a flow meter sensor capable of performing stable measurement in a wide temperature range including a high-temperature range of over 100℃. A flow meter sensor 11 according to the present invention is provided with an ultrasonic vibrator 64, a pipe 1, and an acoustic prism 61. The acoustic prism 61 has: a bottom surface 65 that is disposed so as to be in contact with the outer peripheral surface of the pipe 1; and a front-side sloping surface 63 that supports the ultrasonic vibrator 64. The acoustic prism 61 propagates ultrasonic waves from the ultrasonic vibrator 64 toward a fluid within the pipe 1. The pipe 1 comprises a first heat-resistant resin that has: heat resistance in a temperature range of 90°C to 200°C; and negative thermoacoustic characteristics whereby ultrasonic transmittance decreases as the temperature rises in the aforementioned temperature range. The acoustic prism 61 comprises a second heat-resistant resin that has: heat resistance in the aforementioned temperature range; and positive thermoacoustic characteristics whereby ultrasonic transmittance increases as the temperature rises in said temperature range. Selected drawing: fig. 5
Inventors:
NAGAREDA KENJI (JP)
ISHIGURO YUYA (JP)
INAGAKI KATSUYUKI (JP)
TOMURA HIROMASA (JP)
MURAI YUKI (JP)
ISHIGURO YUYA (JP)
INAGAKI KATSUYUKI (JP)
TOMURA HIROMASA (JP)
MURAI YUKI (JP)
Application Number:
PCT/JP2022/035770
Publication Date:
April 04, 2024
Filing Date:
September 26, 2022
Export Citation:
Assignee:
HONDA ELECTRONIC (JP)
International Classes:
G01F1/667
Foreign References:
| JPS59152888U | 1984-10-13 | |||
| JP7074390B1 | 2022-05-25 | |||
| US4929368A | 1990-05-29 |
Attorney, Agent or Firm:
ATSUMI Hisahiko (JP)
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