Intelligent turbine flowmeter adopts turbine measurement. It first converts the flow velocity into the rotational speed of the turbine, and then converts the rotational speed into an electrical signal proportional to the flow. This flowmeter is used to detect instantaneous flow and cumulative total flow, and its output signal is frequency, which is easy to digitize. In the figure, the induction coil and the permanent magnet are fixed together on the housing. When the ferromagnetic turbine blade passes the magnet, the reluctance of the magnetic circuit changes, thus generating an induction signal. The signal is amplified and shaped by an amplifier and sent to a counter or frequency meter to display the total integrated flow. At the same time, the pulse frequency is converted from frequency to voltage to indicate instantaneous flow. The rotating speed of the impeller is proportional to the flow rate, and the rotating speed of the impeller is proportional to the total flow rate. The output of the turbine flowmeter is FM signal, which not only improves the anti-interference of the detection circuit, but also simplifies the flow detection system. Its range ratio can reach 10: 1, and its accuracy is within 0.2%. The time constant of turbine flowmeter with small inertia and small volume can reach 0.0 1 sec.

Intelligent turbine flowmeter is widely used in petroleum, organic liquid, inorganic liquid, liquefied gas, natural gas and cryogenic fluid.