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.