Ultrasonic drive circuit and ultrasonic flow velocity monitor

The invention belongs to the technical field of ultrasonic detection, and particularly relates to an ultrasonic driving circuit and an ultrasonic flow velocity monitor. The ultrasonic drive circuit comprises a single-chip microcomputer; the primary driving circuit module is connected with the output end of the single chip microcomputer and is externally connected with a digital power supply; the secondary driving circuit module is connected with the output end of the primary driving circuit module and is externally connected with an analog power supply; the grid electrode of the MOS tube is connected with the output end of the secondary driving circuit module, and the source electrode of the MOS tube is grounded; a primary coil of the transformer is respectively connected with a drain electrode of the MOS tube and the current-limiting divider resistor, and the current-limiting divider resistor is externally connected with an analog power supply; and the secondary coil is connected with a load. The ultrasonic