| 摘要 |
<p>A turbulence flow meter for medical use comprising: a volume having at least two openings, one to be connected through a conduit to the patient's mouth, the other(s) to be connected to external air, a moving intercepting element inside said volume, controlled by a servosystem, the movements of the intercepting element causing variation of the area open to the flow. There are further provided a transducer means of the pressure drop across said volume, a servosystem controlling said moving intercepting element, operating in accordance to the signal(s) coming from the transducer means, and causing a variable pressure drop across the volume, the variable pressure drop being held directly proportional to the flow under measurement, and a microprocessor for the detection and the evaluation of the measured flow, according to the signals coming from the transducer means and from the servosystem.</p> |
