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Method and device for calibrating handheld digital meter

A digital meter and hand-held technology, applied in instruments and other directions, can solve problems such as low efficiency, no data transmission interface, and inability to guarantee consistency, and achieve the effect of improving efficiency.

Inactive Publication Date: 2020-04-17
BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since most of the hand-held digital meters only display values ​​through LCD and LED, and do not provide an interface for data transmission, the verification of hand-held digital meters by domestic metrology technical institutions is still at the stage of manual verification, and the efficiency is low. The time to hold the digital meter is about 15 minutes
In addition, during the manual measurement verification, it is manually judged whether the signal is stable or not and the appropriate measurement result data is selected, so good consistency cannot be guaranteed, and the hand-held digital meter verification task cannot be completed on time with quality and quantity guaranteed, and it is difficult to meet market demand.

Method used

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  • Method and device for calibrating handheld digital meter
  • Method and device for calibrating handheld digital meter
  • Method and device for calibrating handheld digital meter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0086] like figure 2 As shown, on the basis of the first embodiment, this embodiment also provides a verification method for a hand-held digital meter.

[0087] It should be noted that this embodiment is based on the first embodiment and includes all the steps and features of the first embodiment. When this embodiment is implemented, all the steps of the first embodiment are also implemented, and this embodiment will not repeat them here.

[0088] In this embodiment, to identify the dial of the hand-held digital meter, the content to be recognized at least includes: numbers, characters, the current position of the gear of the digital meter, and the position of the socket of the test pen.

[0089] Preferably, the recognition of numbers and characters is realized by image recognition technology based on CNN deep learning, and the recognition image can be collected by a high-definition camera, and recognized by an intelligent recognition neural network model. Before recognition...

Embodiment 3

[0102] like image 3 As shown, on the basis of the first embodiment, this embodiment also provides a verification method for a hand-held digital meter.

[0103] It should be noted that this embodiment is based on the first embodiment and includes all the steps and features of the first embodiment. When this embodiment is implemented, all the steps of the first embodiment are also implemented, and this embodiment will not repeat them here.

[0104] Further, the verification method of the handheld digital meter provided in this embodiment, wherein the verification data of the handheld digital meter is processed, specifically includes:

[0105] S301, calling corresponding parameters according to the state and step number of the current test step.

[0106] Among them, the step status includes self-inspection, basic information acquisition, DC voltage indication error, AC voltage indication error, DC resistance indication error, DC current indication error, AC current indication e...

Embodiment 4

[0118] Based on the same inventive concept, this embodiment also provides a verification device for a hand-held digital meter, such as Figure 4 shown, including:

[0119] The identifying and grasping module 401 is configured to identify and grasp the handheld digital meter, and place the handheld digital meter on a predetermined station.

[0120] The dial intelligent identification module 402 is used to identify the dial of the handheld digital meter, record the dial result, and generate the positioning information of the handheld digital meter;

[0121] An automatic control module 403, configured to automatically control the handheld digital meter according to the positioning information generated by the dial intelligent identification module and a predetermined control process;

[0122] The electrical standard source module 404 is used to provide voltage, current or resistance signals for the handheld digital meter;

[0123] Comprehensive verification module 405, used for...

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Abstract

The invention discloses a calibration method of a handheld digital meter and is used for improving calibration efficiency and accuracy of calibration data. The method comprises steps of identifying and grabbing the handheld digital meter; controlling the handheld digital meter according to the preset calibration process; identifying a dial plate of the handheld digital meter; processing calibration data of the handheld digital meter; and sending the calibration result to a metering information management system. The invention further discloses a calibration device of the handheld digital meter. The calibration method is advantaged in that full-automatic metering of preset calibration items and calibration points of the handheld digital meter can be achieved through parameter configuration,metering work efficiency is improved, errors caused by human factors are avoided, and calibration efficiency and data accuracy are improved.

Description

technical field [0001] This application relates to the field of intelligent metrology verification, in particular to a method and device for the verification of hand-held digital meters based on deep learning. Background technique [0002] With the rapid development of all walks of life in our country, the demand for metrological verification of handheld digital meters in various enterprises and institutions, especially in the national defense and military industry systems, is increasing year by year. Since most of the hand-held digital meters only display values ​​through LCD and LED, and do not provide an interface for data transmission, the verification of hand-held digital meters by domestic metrology technical institutions is still at the stage of manual verification, and the efficiency is low. The time to hold the digital meter is about 15 minutes. In addition, during the manual measurement verification, it is manually judged whether the signal is stable or not and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D18/00
CPCG01D18/00
Inventor 张修建王兵张鹏程刘晓旭张铁犁
Owner BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH
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