A stabilized power supply circuit includes a charge pump power supply circuit including four switching elements and a capacitor, and an error amplifier comparing the output voltage of the charge pump power supply circuit and a reference voltage and outputting an error signal on the basis of the difference therebetween. The backplane comprises a frame formed by a plurality of brackets, and bridges which are arranged on the brackets and used for fixing PCBs; the bridges can rotate relative to the fixed points of the bridges to the brackets; the bridges are provided with chutes or through holes used for installing hillocks. The insecticide is formulated by dissolving an insecticidal methylamine derivative and an insect growth regulator in a solvent containing N-octyl pyrrolidone andor N-methyl pyrrolidone to increase the solvency of the IGR component, thereby providing an insecticide having high insecticidal activity. The threat assessor also in response to the vehicle status signal and the object status signal generates a collision assessment signal.