Liquid flow non-magnetic detector and detection method thereof

Abstract

The invention relates to a liquid flow non-magnetic detector and a detection method thereof. The detector comprises a microprocessor unit, a power supply control circuit and an excitation control circuit which are connected with the microprocessor unit, and an LC oscillating circuit, an LC oscillating detection circuit, an envelope detection circuit and a trigger circuit which are connected in sequence, wherein the output ends of the power supply control circuit and the excitation control circuit are respectively connected with two ends of the LC oscillating circuit, and the trigger circuit is connected with a timer capture input end of the microprocessor unit. The LC oscillating circuit is located above an impeller comprising an insulating area and a conducting area. The detection method comprises the steps that an oscillating wave output by the LC oscillating circuit is processed by the LC oscillating detection circuit, the envelope detection circuit and the trigger circuit and then is subjected to timer capture by the microprocessor unit, the position changes of the conducting area and the insulating area of the impeller are judged, and finally liquid flow is calculated. The measuring distance is larger, the application range is wide, the singlechip microcomputer selection limitation is less, the cost is reduced, and the universality is good.

Description

technical field

[0001] The invention relates to a non-magnetic flow meter, in particular to a non-magnetic detection device for liquid flow and a detection method thereof. Background technique

[0002] In the non-magnetic water meter, the MSP430FW427 single-chip microcomputer is mostly used to realize the flow detection at present, and the SCAN IF non-magnetic detection module is integrated inside the single-chip microcomputer. The SCAN IF non-magnetic detection module is a unique module of the MSP430FW42X series single-chip microcomputer launched by Texas Instruments. It can automatically detect linear or rotary motion at low power consumption, and is mainly used for heat meters, hot and cold water meters, and gas meters. And industrial flow meters and other instruments. In the existing non-magnetic water meter, the flow detection part is mainly composed of the SCAN IF non-magnetic detection module inside the microcontroller and two LC sensors connected externally. The LC ...

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