Conveyor Position Detection Using Irregular Optical Marking
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Solution Overview
Problem
Existing conveyor position detection methods are costly, require high precision in grid geometry, and suffer from poor repeatability due to conveyor wear and elasticity-induced distortions, leading to inaccurate readings.
Innovation Solution
A method involving an irregular optical marking system on the conveyor belt, detected by a vision device at preset intervals, allowing for precise position monitoring by comparing detection data to determine movement extent and direction, regardless of controlled or free movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a regular grid is provided on the conveyor belt with an optical detection system, then the position detection precision is improved, but the cost increases and the reliability deteriorates due to wear and distortions
Solution Approach 1:
The patent applies asymmetry by replacing the traditional regular grid pattern with an irregular marking pattern on the conveyor belt. The irregular marking consists of marks with varying distances between them, creating an asymmetric and unique pattern that can be reliably detected by the vision device. This asymmetric pattern remains identifiable even when the belt undergoes elastic deformations or wear, as the relative positions and irregular spacing of marks serve as unique identifiers that maintain detection reliability and precision over time.
2Measurement precision
If a regular grid is provided on the conveyor belt with an optical detection system, then the position detection precision is improved, but the device complexity and cost increase
Solution Approach 1:
The patent applies this principle by using a simple irregular marking pattern that can be easily applied to the conveyor belt, replacing the need for complex precision grid fabrication. The marking can be implemented through simple printing or attachment methods, making the system cheaper and less complex while maintaining detection precision through the unique irregular pattern recognition capability of the vision device.
3Ease of operation
If the conveyor moves in free directions manually, then the ease of operation is improved, but the position control precision deteriorates
Solution Approach 1:
The patent applies feedback by using the vision device to continuously detect the irregular marking pattern on the conveyor belt and determine the actual position based on the detected mark configurations. This feedback mechanism allows the system to accurately track the conveyor position even during manual free-direction movement, as the irregular marking pattern provides unique positional references that enable precise position determination without requiring controlled or restricted movement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach provides reliable, continuous, and cost-effective conveyor position detection, unaffected by wear and distortions, with the ability to monitor movements precisely and efficiently.
Implementation Method 1
providing on said conveyor an irregular marking, constituted by marks and the like that are optically detectable; by means of a vision device, detecting portions of said marking
Data Source
Figure 1
AI summary
A method for detecting the position of a conveyor, comprising the steps of: providing on the conveyor belt (1) an irregular marking (2), constituted by marks and the like that are detectable optically; by means of a vision device (3), detecting portions of the marking at preset time intervals; comparing a detection performed by the vision device (3) with a previously performed detection, in order to determine the extent and direction of the movement.