초록 ▼

A plurality of flow velocity sensors are vertically installed in line at different positions in the same cross section in a gas flow passage in a pipe. Detection signals from the flow velocity sensors are inputted to a mean flow velocity computing unit which calculates a mean value of flow velocity

A plurality of flow velocity sensors are vertically installed in line at different positions in the same cross section in a gas flow passage in a pipe. Detection signals from the flow velocity sensors are inputted to a mean flow velocity computing unit which calculates a mean value of flow velocity measurements. The mean flow rate calculated at the mean flow velocity computing unit is converted into a flow rate by a flow rate computing unit to be displayed by a display. Regardless of flow velocity distribution in the pipe, which may change due to differences in the pipe shape, flow rates are accurately measured. As a result, flow rates are accurately measured over a wide range.

대표청구항 ▼

[ What is claimed is:] [3.] A flowmeter comprising:a) a plurality of guide insertion sections passing through the wall of a pipe in the same cross section perpendicular to the direction of the length of the pipe;b) a plurality of hollow guides each of which is inserted into the pipe via each of said

[ What is claimed is:] [3.] A flowmeter comprising:a) a plurality of guide insertion sections passing through the wall of a pipe in the same cross section perpendicular to the direction of the length of the pipe;b) a plurality of hollow guides each of which is inserted into the pipe via each of said guide insertion sections and has at least one first fluid passage along the direction of fluid flow;c) a plurality of flow velocity sensor units each of which is inserted into each of said guides and has at least one second fluid passage corresponding to said first fluid passage in said guides, and has at least one flow velocity sensor facing said second fluid passage;d) a mean flow velocity computing means for calculating the mean value of flow velocity measurements measured at the multiple positions in a fluid flow passage, with the output signals from said plural flow velocity sensors in said flow velocity sensor units as inputs; ande) a flow rate computing means for calculating a flow rate of fluid based on the result calculated by said mean flow velocity computing means.