Digital type universal meter automatic calibration system

An automatic calibration and multimeter technology, which is applied in the direction of measuring devices, instruments, and measuring electrical variables, can solve problems such as poor consistency, error-prone, and low efficiency, and achieve the goal of improving accuracy and work efficiency, and improving consistency and accuracy Effect

Inactive Publication Date: 2014-04-23
NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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Problems solved by technology

[0003] 1. Low efficiency: multimeters usually have multiple functions (AC, DC voltage, AC, DC current and resistance, etc.), each function includes multiple ranges, and manual verification and calibration require repeated wiring, switching functions, and switching ranges
[0004] 2. Error-prone: the semi-automatic calibration device needs human eyes to read the data, and manually

Method used

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  • Digital type universal meter automatic calibration system
  • Digital type universal meter automatic calibration system
  • Digital type universal meter automatic calibration system

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0021] The present invention adopts the following technical solutions: a digital multimeter automatic calibration system, comprising an image acquisition device 1, a multifunctional calibration source 2, a computer 3 and calibration software 4 running in the computer 3, characterized in that: the computer 3 is respectively It is connected with the image acquisition device 1 and the multi-function calibration source 2, and the image acquisition device 1 is connected with the multi-function calibration source 2 and the digital multimeter to be checked.

[0022] When calibrating the digital multimeter to be tested, the computer 3 runs the calibration software 4, controls the multifunctional calibration source 2 to input corresponding AC / DC voltage, AC / DC current and resistance...

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Abstract

The invention provides a digital type universal meter automatic calibration system. A calibration module controls a multifunctional calibration source to input corresponding A/DC voltage, A/DC current and resistance values to a detected digital type universal meter via an image acquisition device according to a gear range of the detected digital type universal meter. The image acquisition device acquires the measured data displayed by the digital type universal meter, then the measured data are inputted to the calibration module to be processed and error calculation and certificate generation are performed on the measured data. The measured data of the digital type universal meter can be automatically read, identified and led in so that artificial eye reading of the measured data of the universal meter is substituted and accuracy and working efficiency of calibration are enhanced.

Description

technical field [0001] The invention belongs to the technical field of electronic instruments and relates to an automatic calibration system, which can be used for automatic calibration of digital multimeters. Background technique [0002] The traditional digital multimeter semi-automatic calibration device mainly controls the multi-functional calibration source output standard signal to the multimeter through the computer, and manually reads the multimeter data and manually inputs it into the computer to realize the calibration function. This kind of calibration device has the following disadvantages: [0003] 1. Low efficiency: multimeters usually have multiple functions (AC, DC voltage, AC, DC current, and resistance, etc.), and each function includes multiple ranges. Manual verification and calibration require repeated wiring, switching functions, and switching ranges. [0004] 2. Error-prone: The semi-automatic calibration device needs human eyes to read the data, and m...

Claims

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Application Information

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IPC IPC(8): G01R35/00
Inventor 行江陆强张伟罗政元武丽仙郑冰张仪徐焕蓉
Owner NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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