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Reading method of round-like pointer instrument used for mobile robot

A mobile robot and instrument reading technology, which is applied to instruments, computer components, character and pattern recognition, etc., can solve the problems of unrobust dial search, inability to achieve accurate instrument positioning, and heavy workload

Inactive Publication Date: 2014-07-09
STATE GRID INTELLIGENCE TECH CO LTD
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the aforementioned CN1581209A, this solution has a great improvement, but this method can only be adapted to fixed monitoring points, and it is not robust to the search of the dial. For complex outdoor environments, the precise positioning of the instrument cannot be realized.
Especially to establish a cumbersome database, the workload in the early stage is very large

Method used

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  • Reading method of round-like pointer instrument used for mobile robot
  • Reading method of round-like pointer instrument used for mobile robot

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Embodiment Construction

[0026] A method for automatic reading of a pointer instrument on a mobile robot. First, a template library should be established, and an inspection route should be set according to the inspection object of the mobile robot, and the target pointer instrument on the inspection object should be collected in a single sheet. Device images are added to the template library. Manually extract the template of the target instrument, mark the corresponding relationship between the scale and angle of the target instrument, and store it in the database. Further, it can represent instruments with uniform and non-uniform scale types to match the relationship between different pointer angles and readings.

[0027] After the template is generated, the reading operation can be performed on the corresponding pointer and instrument. The reading operation steps are as follows:

[0028] Step1: Input the image to be recognized, that is, collect the relevant image through the mobile robot and send it...

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Abstract

The invention discloses a reading method of a round-like pointer instrument used for a mobile robot. A target instrument template is extracted manually, and the reading method comprises the following steps: A. carrying out graying and binaryzation on a target image collected by the mobile robot; B. firstly extracting a dial area of the image obtained in the step A, extracting a boundary image of an equipment by utilizing a Canny algorithm, taking a boundary point to fit an oval, filtering the obtained oval, and rejecting a non-oval image which is fitted into the oval so as to obtain the dial image; C. extracting a pointer in an area obtaining the dial image, so as to obtain the angle of the pointer; and D. extracting the relation of a pointer angle and a reading corresponding to the target instrument in a database, and calculating the reading corresponding to the angle obtained in the step C. The method provided by the invention has robustness in the positioning precision of the robot, can be used for accurately reading the instrument, is small in calculation amount, and is simple in constructing a prophase database.

Description

technical field [0001] The invention relates to a computer image processing method, in particular to a method for automatic reading of a pointer instrument based on image collection by a mobile robot; a quasi-circle is a set composed of a circle and an ellipse. Background technique [0002] In substations, instruments play an important role, especially the readings of various instruments. How to realize the readings of various instruments is an important factor related to the accuracy of data collection, low difficulty of collection and low cost. At the current stage, the collection and recognition of various instrument images mostly rely on fixed cameras. In this collection method, the position of the dial area in the collected images is fixed and easy to identify, but it is necessary to install a large number of fixed cameras. Equipment, which is not only affected by large capital consumption, but also restricted by the safety distance of substation equipment. [0003] Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/46
Inventor 王万国王滨海王振利李健李丽
Owner STATE GRID INTELLIGENCE TECH CO LTD
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