公开(公告)号：US20240288332A1

公开(公告)日：2024-08-29

申请号：US18411080

申请日：2024-01-12

Applicant: Keyence Corporation

Inventor： Masaki ISHIHARA ,  Yuta KATO ,  Masashi KAWANAKA ,  Shinichi TSUKIGI

IPC: G01M3/26

CPC classification number: G01M3/26

Abstract: It is possible to perform prompt and accurate diagnosis of a pneumatic device while mitigating a burden on a user at the time of introduction. A flow sensor includes: a flow rate measuring element for measuring a flow rate of a working gas in a pipe; a pressure measuring element for measuring a pressure of the working gas in the pipe; and an evaluation unit that determines a characteristic amount indicating an operation of the pneumatic device based on a combination of the flow rate measured by the flow rate measuring element and the pressure measured by the pressure measuring element, and evaluates the operation of the pneumatic device based on the determined characteristic amount.

公开(公告)号：US20230066279A1

公开(公告)日：2023-03-02

申请号：US17860251

申请日：2022-07-08

Applicant: Keyence Corporation

Inventor： Yasunori KAWAGUCHI ,  Masaki WADA ,  Masaki ISHIHARA ,  Daishiro ISHIKAWA ,  Ryuma MIYAKE

IPC: G01F1/663 ,  G01F1/667

Abstract: Provided is an ultrasonic flow sensor with improved practicality. An ultrasonic wave is transmitted and received by an ultrasonic element. A first flow rate value of a fluid in a pipe is calculated based on a propagation time difference of an ultrasonic signal, a measurement value corresponding to an ultrasonic velocity, and a parameter for identifying an inner diameter of the pipe. A second flow rate value of the fluid in the pipe is calculated based on a frequency shift of the ultrasonic signal and the parameter. The first flow rate value is calculated using a propagation time of the ultrasonic signal as the measurement value in accordance with a correspondence relationship among a distance of a path through which the ultrasonic wave propagates through the fluid in the pipe, a time for which the ultrasonic signal propagates in the path, and the ultrasonic velocity.