Crane jib false-touch-preventing wireless reminding device

The invention discloses a crane jib false-touch-preventing wireless reminding device. The device comprises a mechanical shell, an MCU main control circuit and a power circuit. The MCU main control circuit and the power circuit are arranged in the mechanical shell, and an ultrasonic ranging circuit, a wireless transmitting circuit, a system protection circuit and a display and alarm circuit are connected to the MCU main control circuit. The power circuit comprises a charging circuit, a battery and a step-down circuit. The power circuit is connected with the MCU main control circuit and a connecting circuit thereof, the MCU main control circuit is connected with a receiving terminal through the wireless transmitting circuit, a 433MHZ micro-power-consumption wireless transmitting circuit is adopted as the wireless transmitting circuit, a piezoelectric type ultrasonic ranging circuit is adopted as the ultrasonic ranging circuit, the measuring distance is 0.01 m-10.50 m, the ranging precision is +/-0.3 cm, and the output mode is TTL level pulse width output. A crane driver can be promoted to correct and control the position of a jib, it is guaranteed that the jib is located at a safe position, and safety accidents are reduced.