| 摘要 |
PURPOSE: A portable measuring apparatus of lung capacity is provided to simplify the structure of a device by receiving a light which is switched by the interference of a rotation body. CONSTITUTION: A portable measuring apparatus of lung capacity includes a housing(10), a straight pipeline(11), a rotation body, a light emitting diode and a light receiving diode, a controller, and a displays unit. The straight pipeline passes through the inside of the housing. The rotation body is arranged in the street pipeline and is rotated according to air flow. The light emitting diode and the light receiving diode switches projected light according to the rotation of the rotation body while being installed between the rotation bodies The controller checks the state of a pulse applied to the light receiving diode to calculate the number of rotations and a second pulse. The display unit is installed in one side of housing and display the capacity of the lungs as a digital value.
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