Title:
MONITOR SYSTEM AND MONITOR METHOD
Document Type and Number:
Japanese Patent JP2021032755
Kind Code:
A
Abstract:
To accurately detect abnormality of a monitoring object.SOLUTION: A signal acquisition unit of a monitor system acquires output from an exhaust valve position sensor as a measurement signal. A signal processing unit performs processing by an auto encoder to the measurement signal for outputting a processing signal. A detection unit compares the measurement signal with the processing signal for detecting abnormality on an exhaust system. A first determination unit of the detection unit determines that abnormality occurs on the exhaust system, when a cumulative error for one cycle between the measurement signal and the processing signal is equal to or greater than a first error threshold (steps S131-S132). A second determination unit determines that abnormality occurs on the exhaust system when an error between the measurement signal and the processing signal on a prescribed notable sampling point is equal to or greater than a second error threshold, in a specific region being parts of the measurement signal and the processing signal for one cycle (steps S133-S136). Therefore abnormality on the exhaust system can be detected accurately.SELECTED DRAWING: Figure 5B
Inventors:
KUNIOKA JUN
WATANABE AKIRA
HATTA TAKASHI
MINE TAKAAKI
WATANABE AKIRA
HATTA TAKASHI
MINE TAKAAKI
Application Number:
JP2019154270A
Publication Date:
March 01, 2021
Filing Date:
August 27, 2019
Export Citation:
Assignee:
HITACHI ZOSEN CORP
International Classes:
G01M13/00; B63H21/14; B63H21/32; G05B23/02
Attorney, Agent or Firm:
Masahiro Matsusaka
Tsutomu Tanaka
Masamichi Ida
Tsutomu Tanaka
Masamichi Ida