The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 18, 2021
Filed:
Nov. 20, 2017
Hitachi, Ltd., Tokyo, JP;
Mutsumi Suzuki, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An object is to provide an ultrasonic measurement apparatus capable of measuring a gap length between a rotational body and a casing without providing a reference position indication member on the rotational body in fluid machinery. The ultrasonic measurement apparatus which applies to fluid machinery having a rotational body as a measurement object includes: an ultrasonic probe installed and used outside a casing part of the fluid machinery, the casing part accommodating the rotational body; a measurement circuit unit electrically connected to the ultrasonic probe; and a reference signal generation unit. The measurement circuit unit includes a gap calculation unit configured to calculate a gap length between the rotational body and the casing part; the reference signal generation unit includes a rotary machine signal detection unit to be electrically connected to a rotary machine conversion unit, and a reference time generation unit electrically connected to the rotary machine signal detection unit; and the measurement circuit unit includes an offset time setting unit configured to make an offset time variable, the offset time spanning from a reference time signal outputted from the reference time generation unit to transmission by the ultrasonic probe.