| 摘要 |
The fluid sensor senses/amplified minute voltage generated when fluid flows by setting a vibration generator within it and assembling a vibration sensor outside it. The fluid sensor comprises the vibration sensor (39) sensing vibration source i.e. sound wave; a narrow passageway (35a) spraying the induced fluid because its diameter is narrower than an inlet and outlet; the vibration generator generating continuous vibration sound when the fluid flows through the narrow passageway; a flange, extended from a body (34), for assemblying a cover (42); the vibration sensing circuit (K) including an amp circuit (A), a frequency modulation circuit (B), a filtering circuit (C), a high/low decision circuit (D), and an output circuit (E).
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