Inspection device

An inspection device comprising:

• a flame sensor configured to detect ultraviolet rays generated from a flame generated by a combustion apparatus;
• an application voltage generation unit configured to periodically apply a drive voltage to an electrode of the flame sensor;
• a discharge number measurement unit configured to measure the number of discharges of the flame sensor per unit time;
• a light emission information generation unit configured to generate, as light emission information, information obtained based on a value obtained by dividing a total of the number of discharges per unit time measured by the discharge number measurement unit by a total measurement time;
• and
• a determination unit configured to determine a state of the combustion apparatus based on the light emission information,
• wherein
• the determination unit is configured to determine the state of the combustion apparatus by using the light emission information generated by the light emission information generation unit as a reference at a normal time, using the light emission information generated by the light emission information generation unit as determination information at a time of determination, and comparing the reference with the determination information,
• the combustion apparatus includes a pilot burner and a main burner, and is configured to ignite the pilot burner, and thereafter ignite the main burner with a pilot flame of the ignited pilot burner, and
• the determination unit is configured to determine the state of the combustion apparatus based on a first comparison result obtained by comparing the reference with the determination information in a first period from start of ignition of the pilot burner to ignition of the main burner, and a second comparison result obtained by comparing the reference with the determination information in a second period after the main burner is ignited.