Video measuring tool based on camera

Abstract

The invention discloses a video measuring tool based on a camera. The video measuring tool comprises a measuring tool body and the camera (2), wherein the camera (2) is used for shooting scale marks on a graduated scale body (1) to obtain a scale mark image, and the measuring tool body can be an extension scale, a sliding scale, a micrometer caliper and a universal angle meter. By the adoption of the video measuring tool, scale values can be shown accurately in a visualized mode through the scale mark image, reading of the scale values is achieved by shooting the scale mark image with the camera, errors caused by failures of electronic elements are eliminated, influences of temperature drift of the electronic elements can be avoided fundamentally, influences of failures of a temperature compensation circuit can be avoided, it is physical scale marks that are shot by the camera, neither the scale marks nor the camera can be affected by temperature drift, scale reading results are high in reliability, maintenance is easy, and cost is low. For special engineering projects, remote network monitoring of multiple tools to be measured can be achieved, monitoring efficiency is improved, and monitoring workload and cost are reduced.

Description

technical field [0001] The invention relates to a measuring tool with a scale, in particular to a video measuring tool based on a camera. Background technique [0002] Measuring tool is the abbreviation of measuring tool in kind. It is an appliance with a fixed shape when used to reproduce or provide one or more known quantities of a given quantity. Including length measuring tools, angle measuring tools and weight measuring tools, common rulers, tape measures, vernier calipers, screw micrometers, dial indicators, angle rulers, scales, etc. [0003] The traditional way of reading the scale of measuring tools with scale marks is mostly to observe the readings manually with naked eyes, which is inefficient and has poor accuracy. Especially for high-precision measuring tools such as micrometers and micrometers, the scale lines are very densely arranged, and it is difficult to accurately distinguish the scales with the naked eye. In addition, for some measuring tools with rela...

AI Technical Summary

Problems solved by technology

However, traditional measuring tools that support digital display are mostly realized by electronic components such as capacitive sensors, grating sensors, and inductors. These electronic components have a limited service life and are inconvenient to replace and maintain.

Moreover, its measurement accuracy is seriously affected by environmental factors such as temperature, and temperature drift cannot be avoided, and the accuracy cannot be guaranteed; in order to solve the problem of temperature drift, temperature compensation is usually used to compensate for interference, but the temperature compensation circuit also has faults. Hidden dangers, and the accuracy of the scale reading results cannot be guaranteed

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