Automatic inspection system and wireless slave device

An automatic inspection system comprising:

• a wireless slave device;
• and
• a wireless master device,
• wherein the wireless slave device includes:
• a sound collection unit that collects sound generated from an inspection target object,
• an analysis unit that randomly samples a set of features of the collected sound and features of normal sound learned in advance and obtains a degree of difference based on a difference of the set of features, and obtains sound state information of the collected sound, which is an associated frequency band having an influence on the degree of difference and a magnitude of the associated frequency band, as an analysis result,
• a wireless communication unit that wirelessly transmits data including the analysis result which includes the degree of difference and the sound state information, to the wireless master device, and
• a power supply unit that supplies power to the sound collection unit, the analysis unit, and the wireless communication unit, and
• wherein the wireless master device is configured to perform processing of receiving and managing the data from the wireless slave device, and transmitting the analysis result extracted from the data to a monitoring terminal that monitors a state of the inspection target object.