Low-power-consumption electromagnetic flow converter

Abstract

The invention provides a low-power-consumption electromagnetic flow converter mainly comprising an exciter circuit, a power source, a sensor, a signal conditioning circuit and a single-chip microcomputer interface circuit. The low-power-consumption electromagnetic flow converter is characterized in that the exciting mode of the exciter circuit is pulse rectangular wave exciting; the power source has two combination modes of lithium thionyl chloride batteries; the signal conditioning circuit comprises an instrument amplifier, a low pass filtering circuit, a resistance-capacitance coupling circuit and a high gain amplifying circuit; the single-chip microcomputer interface circuit comprises a single-chip microcomputer, a reset circuit, a crystal oscillator, an A / D input unit, a display output unit, a 485 communication output unit, a storer circuit, and a JTAG debugging interface. The low-power-consumption electromagnetic flow converter is characterized by low power consumption, small size and field display and guarantees measuring accuracy.

Description

technical field [0001] The invention belongs to the application field of optomechanical integration, and relates to an electromagnetic flowmeter, in particular to an electromagnetic flow converter. Background technique [0002] Flowmeter is one of the most important instruments in industrial measurement, widely used in metallurgy, electric power, coal, chemical industry, petroleum, transportation, construction, textile, food, medicine, agriculture, environmental protection, and people's daily life, etc. each field. In order to adapt to various purposes, various types of flowmeters have come out one after another. There are more than 60 kinds of flowmeters currently in use. [0003] Electromagnetic flowmeter is an instrument made by Faraday's law of electromagnetic induction to measure the volume flow of conductive liquid. Among many flow meters, electromagnetic flowmeters are widely used in the measurement of conductive fluids due to their own characteristics, including s...

AI Technical Summary

Problems solved by technology

The flow signal generated by the electrodes of the electromagnetic sensor is very weak, and the power frequency interference signal is superimposed on the flow signal. If the power frequency interference suppression is not sufficient, it will seriously affect the signal-to-noise ratio of the signal and affect the measurement results.

[0007] 2. Application environment restrictions

[0012] One is the appearance, some place a separate container next to the meter to store the battery, which is not in line with the development trend of portable flowmeters and small volumes; the other is that the functions are reduced, and some even have no on-site display, and can only pass the remote signal Transmission of flow information brings inconvenience to on-site industrial management and maintenance

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