公开(公告)号：US11339810B2

公开(公告)日：2022-05-24

申请号：US16759289

申请日：2019-08-05

Applicant: KYB Corporation

Inventor： Takayoshi Kikuchi ,  Keitaro Yoshida ,  Takahiro Iwamoto

IPC: F15B15/14 ,  F15B20/00 ,  G01R31/3835 ,  G01R31/374 ,  G01M3/26

Abstract: A fluid leakage detection system includes: a measurement unit configured to detect leakage of working oil in a hydraulic cylinder; and a controller configured to acquire a measurement result from the measurement unit, wherein the controller diagnoses that a battery depletion has been caused in a battery in a case in which it is determined that a data from the measurement unit has not been acquired and it is determined that the battery of the measurement unit has been in a low-remaining-battery-level state, and the controller diagnoses that a communication abnormality has been caused in a first communication part of the measurement unit in a case in which it is determined that the data from the measurement unit has not been acquired and it is determined that the battery has not been in the low-remaining-battery-level state.

公开(公告)号：US11466707B2

公开(公告)日：2022-10-11

申请号：US16967615

申请日：2019-04-23

Applicant: KYB Corporation

Inventor： Yusuke Takahashi ,  Takahiro Iwamoto ,  Keitaro Yoshida ,  Takayoshi Kikuchi

IPC: F15B20/00 ,  F15B15/14 ,  G01M3/26

Abstract: A fluid leakage detection system has a detection space to which working oil leaked out through a rod seal is guided; the rod seal being configured to seal an annular gap between a piston rod and a cylinder head; a sensor unit configured to detect pressure in the detection space; and a controller configured to acquire detected result from the sensor unit, wherein the controller has: a calculation unit configured to calculate a pressure parameter representing a pressure fluctuation in the detection space; a determination unit configured to determine occurrence of leakage of the working oil based on the pressure parameter; and the pressure parameter includes an upper limit value and a lower limit value of the pressure fluctuation obtained from the detected result detected by the sensor unit within a predetermined detection period.