| 摘要 |
<P>PROBLEM TO BE SOLVED: To detect pressure by a simple configuration. <P>SOLUTION: The pressure detection apparatus 1 includes: a housing 2 having an intake port 3 and an exhaust port 4; a blade 30 attached to either one of the intake port 3 and the exhaust port 4; a motor 10 for rotating the blade 30; measurement parts 12, 11 for measuring the rotational frequency of the motor 10 or a current allowed to flow into the motor 10; and a control part 60 for determining the level of pressure loss in the housing 2 by using the rotational frequency or the current. <P>COPYRIGHT: (C)2012,JPO&INPIT |
