| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an air flowrate measurement device 1 capable of reducing the measurement error at pulsation. <P>SOLUTION: In an outlet pipe 2 in which a sensor body 3 is inserted, on both the sides of the sensor body 3, a pair of straightening vanes 8 are arranged parallel to the direction of a main flow. The straightening vanes 8 are arranged in a region wider than the full width of the sensor body 3 arranged along the direction of the main flow and the upper and lower ends of the vanes are respectively abutted to the inner periphery of the outlet pipe 2. By the effect of the straightening vanes 8, the flow of the main flow flowing along the side of the sensor body 3 in the inside path 9 formed inside of the straightening vanes 8, is approximated with a stationary flow and the pulsated flow. Therefore, in the cases of the stationary flow and the pulsated flow, the results are not largely different, the measurement error of the pulsated flow to the stationary flow can be reduced. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
