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

Claim 0:
1. A pressure testing method for 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 method comprising: extracting 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 testing the high-pressure tank based on the extracted plurality of AE waveforms, the method further comprising:
while increasing the pressure inside the high-pressure tank,
classifying the extracted plurality of AE waveforms into first waveforms and second waveforms with a classifier that is machine-learned so as to classify the plurality of AE waveforms into the first waveforms derived from a macrocrack that increases immediately before destruction of the high-pressure tank, and the second waveforms derived from a microcrack smaller than the macrocrack;
counting the number of the first waveforms classified, and
stopping pressurization of the high-pressure tank based on the number of the first waveforms counted.