Detecting apparatus

The utility model provides a detecting apparatus, which relates to an automatic switch, particularly an automatic switch utilizing ultrasonic waves or infrared induction. The utility model comprises a column body 1, wherein the column body 1 comprises an MCU control unit, a prompt unit, a power supply unit, at least two induction units and induction processing units of which the number corresponds to that of the induction units; the induction units send induction signals which are processed through the induction processing units to the MCG control unit, and the induction signals which are preinstalled by the MCG control unit are prompted by the prompt unit. The utility model can detect human beings or pets passing by and can distinguish the high and low human beings or pets, and the utility model can emit various prompt modes to make people to pay attention to that whether the people lie in a safe environment as soon as possible.