Patent ID: 11879596
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Measurement (Instruments)
Classification: CPC F  G  Y | IPC F  G

Claim 7:
8. A pressure tester configured to test a high-pressure tank including a liner having an outer surface and a fiber-reinforced resin layer covering the outer surface of the liner, the pressure tester being configured to extract a plurality of AE waveforms from an output waveform of an AE sensor, the AE sensor being configured to detect AE waves generated in the high-pressure tank while increasing a pressure inside the high-pressure tank; and test the high-pressure tank based on the extracted plurality of AE waveforms,
the pressure tester comprising a controller configured to control pressurization of an inside of the high-pressure tank,
the controller comprising:
a pressurizing unit configured to execute pressurization of the inside of the high-pressure tank;
a classifier that is machine-learned so as to classify the plurality of AE waveforms into first waveforms derived from macrocracks that increase immediately before destruction of the high-pressure tank, and second waveforms derived from microcracks smaller than the macrocracks;
a counter configured to, while increasing the pressure inside the high-pressure tank by the pressurizing unit, count the number of the first waveforms classified by the classifier; and
a pressurization stopper configured to stop pressurization of the high-pressure tank by the pressurizing unit based on the number of the first waveforms counted by the counter.