Self-calibration based high-precision intelligent instrument system and application method thereof

A technology of intelligent instrument and application method, which is 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 a good man-machine interface, eliminate inherent deviation, and simple operation convenient effect

Active Publication Date: 2015-05-13
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional recording instrument does not have the recording function and can only use exte

Method used

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  • Self-calibration based high-precision intelligent instrument system and application method thereof
  • Self-calibration based high-precision intelligent instrument system and application method thereof
  • Self-calibration based high-precision intelligent instrument system and application method thereof

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Embodiment Construction

[0059]The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

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

[0061] The constant current source generating module provides direct current; the constant current generating module includes: power interface 1, which provides 220V alternating current; The gear unit 4, the range gear selection unit 5, the 24-bit A / D converter 8, the range comparison unit 9 and the processor 11...

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Abstract

The invention relates to a self-calibration based high-precision intelligent instrument system and an application method thereof. The system comprises a computer and an intelligent instrument; the intelligent instrument comprises a constant current source generation module, a constant current gear selecting unit, a range gear selecting unit, a current reversing unit, a resistor sensor, a 24-bit A/ D converter, a range comparing unit, a connecting constant current source generating module, a temperature sensor, a processor, a keyboard, a liquid crystal display, a USB interface and an RS232 interface; a hardware calibration mode and a software self-calibration mode are provided. Compared with the prior art, the system has the advantages that the inherent deviation of the AD converter can be effectively removed; the measurement precision can be improved; the system has the advantages of being low in cost, high in performance, and convenient to expand.

Description

technical field [0001] The invention relates to a smart meter, in particular to a self-calibration-based high-precision smart meter system 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 instruments and meters, that is, microcomputers are the main body, replacing conventional electronic circuits of traditional instruments, and becoming a new generation of smart instruments with certain intelligence. The design focus of this type of smart instrument has shifted from the design of analog and logic circuits to the design of special 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 and the continuous development of control technology and microcomputer technology, smart ...

Claims

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Application Information

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IPC IPC(8): G01R27/16G01R35/00
Inventor 秦国锋王力生
Owner TONGJI UNIV
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