Hogendoorn Cornelis Johannes,Tromp Rutger Reinout,Zoeteweij Marco Leendert,Bousché Olaf Jean Paul
申请号：
US201514627206
公开号：
US10151817(B2)
申请日:
2015.02.20
申请国别(地区):
美国
年份:
2018
代理人:
Safran David S.`Roberts Mlotkowski Safran Cole & Calderon, P.C.
摘要：
A flowmeter for determining the flow of a multi-phase medium through a measuring tube has a first and a second measuring device, one of which operates on a tomographic measuring principle and one of uses a measuring principle based on nuclear magnetic resonance. The first measuring device operates in a different manner from the second measuring device, e.g., using a measuring device operating on the measuring principle of pre-magnetization contrast measurement and having a pre-magnetization section with a constant magnetic field. The magnetic field has at least one component perpendicular to the direction of flow of the multi-phase medium and is generated by using magnetic field generating elements, which are arranged around the measuring tube. Additionally, an assembly for exciting nuclear spin by a RF excitation pulse or a RF excitation pulse sequence is part of the measuring device.
