Structure of digital meter10-20, 2025

The structure of a digital meter mainly consists of the following parts:
‌Measurement line‌: It is the basis of digital meters, which is used to convert physical quantities to be measured (such as voltage, current, etc.) into electrical signals.
‌A/D converter‌: It converts analog signals into digital signals for digital display and processing. A/D converter is the core part of a digital instrument and is responsible for converting continuously changing analog quantities into intermittent changing digital quantities.
‌Display screen‌: Used to display the converted digital signal, providing intuitive readings.
‌Power supply‌: Provides the necessary power supply for the entire instrument.
‌Counter and display circuit‌: used to process and display the digital signal output by the A/D converter.
‌How digital meters work‌:
‌A/D conversion‌: The A/D converter converts the continuously changing analog quantity into the intermittently changing digital quantity proportionally for digital display. Commonly used A/D converters include double integrating type and successive comparison type. The double-integration type converts the analog quantity into a time interval through two integrations, and then the pulse generator and counter measure the time interval to obtain the digital quantity; the successive comparison type directly obtains the digital quantity by comparing the voltages successively.
‌Nonlinear compensation‌: Since most detection components and sensors have nonlinear characteristics, nonlinear compensation measures are used to ensure that the numbers displayed by the instrument are proportional to the measured parameters.