Speed regulation signal conversion circuit and speed regulation controller of diesel-driven water pump unit

The utility model provides a speed regulation signal conversion circuit and a diesel-driven water pump unit speed regulation controller, the speed regulation signal conversion circuit comprises a triode Q1, a diode D1 and the like, the base electrode of the triode Q1 is connected with a switching control port I through a resistor R2, the collector electrode of the triode Q1 is connected with a speed regulation signal input port through the diode D1 and a resistor R1, and the switching control port I is connected with a speed regulation signal output port. The negative electrode of the diode D1 is also connected with a switching signal output port I through a resistor R3; the diesel-driven water pump unit speed regulation controller comprises a microcontroller MCU, a key circuit, a CAN communication interface circuit, a TFT color screen display circuit, the speed regulation signal conversion circuit, a water outlet pressure detection circuit, an alarm protection output circuit, a power supply circuit, an EEPRO