The utility model provides a magnetostrictive liquid level meter circuit, and relates to the technical field of liquid level meters. According to the magnetostrictive liquid level meter circuit, a
bus chip KY3001LR with an SOC is applied to a liquid level meter, two-wire
system high-speed
bus setting with a ring and
double ring design is adopted, an edge-triggered pulse excitation circuit is designed through a phase
inverter and an
RC circuit, a constant-current excitation circuit is designed through a constant-
current source, the initial state of the circuit is determined, the
excitation pulse width is determined, and the circuit is stable and reliable. The circuit state adaptability in the power-on process is guaranteed, when the length of the sensor changes, the current can be automatically adjusted, the
magnetostriction line length can be self-adapted, the interchangeability of the base meter is achieved, and the problems of hardware replacement and test, equipment damage caused by program abnormity and the like are avoided. In addition, the two-wire
system high-speed
bus is set to have higher driving capability and loading capability, and more parameters and variables can be transmitted; and all functions are completed by using a
single chip, so that the communication speed is higher, and the wiring cost is also saved.