US 11,698,273 B2
Magnetic detection system
Naoki Nishimura, Kyoto (JP); and Kenta Chinomi, Kyoto (JP)
Assigned to Shimadzu Corporation, Kyoto (JP)
Filed by Shimadzu Corporation, Kyoto (JP)
Filed on Feb. 8, 2021, as Appl. No. 17/170,106.
Claims priority of application No. 2020-036104 (JP), filed on Mar. 3, 2020.
Prior Publication US 2021/0278244 A1, Sep. 9, 2021
Int. Cl. G01D 5/14 (2006.01)
CPC G01D 5/14 (2013.01) 8 Claims
OG exemplary drawing
 
1. A magnetic detection system comprising:
a magnetic sensor configured to be installed underwater to acquire a time-series magnetic signal;
a storage unit configured to store the time-series magnetic signal acquired by the magnetic sensor;
a signal waveform generation unit configured to generate a signal waveform by delimiting the time-series magnetic signal by a prescribed time,
a first determination unit configured to output whether or not a magnetic body has passed as a first determination result based on the time-series magnetic signal of the magnetic sensor;
a second determination unit configured to output whether or not the magnetic body has passed as a second determination result based on the time-series magnetic signal of the magnetic sensor after an output of the first determination result by the first determination unit; and
a notification unit configured to output the first determination result and the second determination result,
wherein the second determination unit is configured to have higher determination accuracy than the first determination unit,
wherein the first determination unit is configured to sequentially output the first determination result based on whether or not at least a part of a shape of the signal waveform is a predetermined shape after the prescribed time has elapsed, and
wherein the second determination unit is configured to output the second determination result based on an entire waveform of the signal waveform after the prescribed time has elapsed.