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A self-calibration-based high-precision smart meter system and its application method

A technology of intelligent instrument and application method, applied in the direction of instruments, measuring devices, measuring electrical variables, etc., can solve the problems of no recording function, poor reliability, low efficiency, etc., achieve good man-machine interface, eliminate inherent deviation, and simple operation convenient effect

Active Publication Date: 2017-12-15
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional recording instrument does not have the recording function and can only use external recording tools
This traditional recording method has high cost, poor reliability and low efficiency

Method used

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  • A self-calibration-based high-precision smart meter system and its application method
  • A self-calibration-based high-precision smart meter system and its application method
  • A self-calibration-based high-precision smart meter system and its application method

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Embodiment Construction

[0059] The present invention will be described in detail below with reference to the drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and provides detailed implementation and specific operation procedures, but the protection scope of the present invention is not limited to the following embodiments.

[0060] Such as figure 1 As shown, a high-precision smart meter system based on self-calibration is used to detect and monitor power grid cables. The system includes a computer 16 and a smart meter. The computer 16 is connected to a printing device. The smart meter includes:

[0061] The constant current source generation module provides DC power; the constant current source generation module includes: power interface 1, providing 220V alternating current; transformer 2, connected to power interface 1, to step down 220V AC; AC / DC power supply unit 3, respectively connected to constant current selection ...

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Abstract

The invention relates to a self-calibration-based high-precision intelligent instrument system and its application method. The system includes a computer and an intelligent instrument. The intelligent instrument includes: a constant current source generating module, a constant current gear selection unit, a range gear selection unit, Current commutation unit, resistance sensor, 24-bit A / D converter, range comparison unit, connected constant current source generating module, temperature sensor, processor, keyboard, LCD, USB interface and RS232 interface, while using hardware calibration and There are two calibration methods for software self-calibration. Compared with the prior art, the invention can effectively eliminate the inherent deviation of the AD converter itself, improve the measurement accuracy, and has the advantages of low cost, high performance, convenient expansion and the like.

Description

Technical field [0001] The invention relates to an intelligent instrument, in particular to a high-precision intelligent instrument system based on self-calibration and an application method thereof. Background technique [0002] The rapid development of microcomputer technology and embedded systems has caused a fundamental change in the structure of instrumentation. Microcomputers are used as the main body to replace conventional electronic circuits of traditional meters and become a new generation of smart meters with a certain intelligence. The focus of the design of such smart meters has shifted from the design of analog and logic circuits to the design of dedicated microcomputer templates or microcomputer functional components, interface circuits and input / output channels, and the development of application software. With the continuous improvement of production automation requirements, the continuous development of control technology and microcomputer technology, smart mete...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/16G01R35/00
Inventor 秦国锋王力生
Owner TONGJI UNIV
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