Ultrasonic fluid meter incorporating two pressure sensors

A ultrasonic fluid meter comprising:

• a conduit in which a fluid can flow;
• an ultrasonic measurement device comprising two transducers arranged to emit and receive ultrasonic signals in the conduit, the ultrasonic measurement device being arranged to evaluate a current flow rate of the fluid from the time of flight of the ultrasonic signals between the transducers;
• a valve positioned along a length of the conduit between the two transducers, the valve comprising a movable member which extends in the conduit and for which a current position can be regulated in order to control the current flow rate of the fluid;
• a position sensor configured to measure the current position of the movable member;
• a first pressure sensor arranged to measure a first pressure of the fluid in the conduit upstream from the valve and a second pressure sensor arranged to measure a second pressure of the fluid in the conduit downstream from the valve;
• a processing circuit arranged, if the current position of the movable member is such that the current flow rate cannot be measured by the ultrasonic measurement device, to evaluate the current flow rate as a function of the current position of the movable member and of a pressure value representative of a difference between the second pressure and the first pressure.