Sound wave adapter

The invention discloses a sound wave adapter, which comprises a sound wave detection circuit used for collecting a sound wave signal, processing the sound wave signal and transmitting the processed sound wave signal to a main controller; the external control signal trigger circuit is used for receiving an external control signal and triggering the sound wave detection circuit to enter a working state when receiving an external starting control signal; the main controller is used for coordinating and controlling the work of each circuit, receiving and processing an output signal of the sound wave detection circuit, and analyzing to obtain a judgment result of the opening and closing state of the valve; and the output feedback circuit is used for simulating the judgment result of the main controller to generate a feedback signal and sending the feedback signal to a rear-end central control platform. The device is good in compatibility, and connection with a central control platform can be achieved without repla