ULTRASONIC FLOW METER Russian patent published in 2025 - IPC G01F1/66 

FIELD: measuring.

SUBSTANCE: invention relates to measurement equipment and can be used in development of ultrasonic flow meters intended for measurement of flow rate of liquids and gases in various industries. Essence of the invention is that the channels for the passage of signals along and against the flow are made with a high degree of symmetry, starting from the corresponding electroacoustic transducer connected to the input of the pulse transformer using a shielded symmetrical communication line, and ending with a chain of series-connected voltage limiters, a differential switch, a matching transformer, the output of which is connected to the input of the differential amplifier. In order to achieve stability of the proposed device to manifestations of thunderstorm activity, the flow meter is equipped with a three-stage protection system, which enables to exclude the ingress of high-voltage pulses to both the input of the receiver and the output of the transmitter.

EFFECT: high noise immunity of the ultrasonic flow meter to general noise while achieving a high degree of lightning protection.

1 cl, 2 dwg