A counting device for automatically controlling sampling and detection of magnetoresistive sensors with low power consumption

Abstract

The invention relates to the technical field of smart metering systems, and especially relates to a low-power counting device automatically controlling sampling detection by a magnetic resistance sensor. The counting device comprises a single chip microcomputer, a first switching circuit, a second switching circuit, a delay circuit, and a magnetic resistance sensor. The single chip microcomputer includes a signal acquisition pin, an excitation power pin, an excitation control pin, a power supply pin, and a grounding pin. The excitation control pin and the excitation power pin of the single chip microcomputer are connected with the first switching circuit. The first switching circuit is connected with the delay circuit. The delay circuit is connected with the second switching circuit. The second switching circuit is connected with the grounding end of the magnetic resistance sensor. The power input end of the magnetic resistance sensor is connected with the power supply pin of the single chip microcomputer. The signal output end of the magnetic resistance sensor is connected with the signal acquisition pin of the single chip microcomputer. The first switching circuit, the delay circuit and the second switching circuit are connected with the grounding pin of the single chip microcomputer. Low-power counting in the dormant state of the single chip microcomputer is realized.

Description

technical field [0001] The invention relates to the technical field of smart meter systems, in particular to a counting device for automatically controlling sampling and detection of magnetoresistive sensors with low power consumption. Background technique [0002] A technology commonly used in smart meter systems is to convert the indication value of the mechanical movement counter into electronic data for data display and communication. The conversion method commonly used at present is the pulse counting method, which is usually collected and processed by a The sensor is usually placed near the sending magnet of the counter of the mechanical movement. The position should be convenient for the sensor to detect reliably. When the mechanical meter measures, the sending magnet will rotate and the sensor will detect the magnetic field. Changes, the single-chip microcomputer periodically and intermittently supplies power to the sensor, and the sensor detects the rotation change ...

AI Technical Summary

Problems solved by technology

[0007] The embodiment of the present invention solves the technical problem of high power consumption in the prior art when a single-chip microcomputer automatically samples, detects and counts in the alternate mode of sleep and work by providing a low-power consumption counting device that automatically controls the sampling and detection of the magnetoresistive sensor

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