ELECTROMAGNETIC FLOWMETER AND METHOD OF OPERATING THE ELECTROMAGNETIC FLOWMETER FOR DETECTING FLOW OF MULTIPHASE FLUIDS

摘要

The present invention relates to a method of operating an electromagnetic flowmeter for detecting a flow of multiphase fluids passing through a conduit and an electromagnetic flowmeter thereof. The electromagnetic flowmeter comprises two coils for generating an electromagnetic field, potential sensing electrodes for measuring potential difference values between the pair of potential sensing electrodes generated by the magnetic field in the multiphase fluids, the two coils are placed on top and bottom of the conduit. The method comprises the steps of generating magnetic fields by electrical excitation of the two coils; obtaining potential difference values between the potential sensing electrodes for the electrical excitation of the two coils; detecting a flow of multiphase flow of fluids based on a difference between the potential difference values hence obtained.