| 摘要 |
A device for measuring the flow rate of a fluid in a conduit, including a bladed impeller mounted in the conduit so as to be driven in rotation by the flow of the fluid, and to which at least one magnet is fixed, and at least one magnetic field sensor arranged in a fixed position near the conduit and capable of causing the generation of a signal (pulse) each time the magnet of the impeller, passes thereby. The arrangement is such that the number of signals (pulses) generated by the sensor in a period of time is representative, according to a predetermined relationship, of the flow rate of the fluid in the associated conduit. A magnetic field sensor is coupled to a processing and a control circuit (PCU) including a microprocessor and associated memory means, predisposed for processing in predetermined manners the signals issued by the at least one sensor and providing a digital output signal having at least one feature which varies in a predetermined manner as a function of the flow rate (Q) of the fluid in the associated conduit. |
