Automatic power generation type flowmeter
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United States of America Patent
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Apr 6, 1993
Issued Date -
N/A
app pub date -
Jan 16, 1991
filing date -
Jan 20, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An automatic power generation type flowmeter generates a measuring signal through measuring of a flow rate of fluid flowing through a passage and transmits it to a receiver at a remote location. The flowmeter includes a power generator coupled to a detection shaft rotated under an action of a fluid flowing through the passage and outputting an electric signal. The power generator includes a permanent magnet having S- and N-poles, an electromagnetic coil having a core around its axis and arranged adjacent to the magnet with the axis of the coil located in a direction substantially perpendicular to a rotation shaft, a first stator magnetically coupled to the core and having its magnetic induction portion arranged opposite to the N-pole of the magnet, and a second stator magnetically connected to the core and having its magnetic induction portion arranged opposite to the S-pole of the magnet.
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