An infrared thermal imaging system includes a focal plane array of infrared detectors, read out integrated circuitry operatively coupled to the FPA, and a microcontroller having at least one video display interface operatively coupled to the ROIC. Each of the rotor cores has holder-positioning grooves to which holder arms are fitted, and bridge parts formed corresponding to the holder positioning grooves. When the temperature of the catalyst is low, a large amount of the aqueous urea solution is fed to make the urea contained in the aqueous urea solution be stored in the catalyst. The edges may include male or female edges. As such, DC-DC converter reduces the converted DC voltage to lower DC voltages to power all circuits except for the lamp and DC-AC inverter converts the converted DC voltage into higher AC voltage output to drive the lamp. M is an integer, and 1\u2266M\u2266N.