US 11,703,189 B2
Fluid leakage diagnosing device, fluid leakage diagnosing system, fluid leakage diagnosing method, and recording medium storing fluid leakage diagnosing program
Hirofumi Inoue, Tokyo (JP); Shigeki Shinoda, Tokyo (JP); Junichiro Mataga, Tokyo (JP); and Katsumi Kikuchi, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/272,394
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Sep. 2, 2019, PCT No. PCT/JP2019/034337
§ 371(c)(1), (2) Date Mar. 1, 2021,
PCT Pub. No. WO2020/050192, PCT Pub. Date Mar. 12, 2020.
Claims priority of application No. 2018-165442 (JP), filed on Sep. 4, 2018.
Prior Publication US 2021/0325005 A1, Oct. 21, 2021
Int. Cl. F17D 5/06 (2006.01); G01M 3/24 (2006.01)
CPC F17D 5/06 (2013.01) [G01M 3/243 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A fluid leakage diagnosing device comprising:
at least one memory storing a computer program; and
at least one processor configured to execute the computer program to,
when fluid leakage relating to a pipeline is diagnosed by employing adaptive signal processing to suppress a component of a disturbance vibration contained in a vibration measured at a prescribed location in the pipeline,
acquire distribution information that is associated with a characteristic of the pipeline and represents an actual distribution result of values of a parameter in the adaptive signal processing when performance of suppressing the component of the disturbance vibration satisfies a criterion;
based on the distribution information, estimate a probability density at which the values of the parameter exists when the performance satisfies the criterion; and
based on the probability density estimated, determine a range to search for the values of the parameter in the adaptive signal processing.