| 摘要 |
PROBLEM TO BE SOLVED: To provide an electromagnetic flow rate sensor for a river, a flow rate measuring device for a river, and a flow rate measuring system for a river with excellent durability. SOLUTION: The electromagnetic flow rate sensor 40 comprises a mount type housing 50 inclined toward both ends in the flow direction of a stream, and an inclined side wall 52 on the upstream side is upwardly inclined so as to be separated from a base panel 20 as from the upstream to the downstream. Thereby, an impact when a foreign substance having flowed from the upstream of the river 11 collides with the electromagnetic flow rate sensor 40 is eased, and the durability (reliability) is improved. Since the inclined side wall 52 on the upstream side inclines to the flow direction of the stream, it is prevented that flow-down matter is caught by the electromagnetic flow rate sensor 40. Since resistance of the stream is suppressed and the stream flows smoothly along the surface of the mount type housing 50, the flow rate can be stably measured. COPYRIGHT: (C)2008,JPO&INPIT
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