Continuous Rod Diameter Measurement Synchronization
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Solution Overview
Problem
The tobacco industry faces challenges in accurately determining the diametric profile of rod-like articles, particularly in high-speed production environments with varying material stiffness and hardness, where existing methods struggle to maintain measurement accuracy and reliability due to shading issues and constant object movement.
Innovation Solution
A method that synchronizes measuring sectors and time windows with the structure and speed of the continuous rod, using signals from the cutting head or rod position to ensure precise diameter measurement across the product's length, allowing for selective sector measurement and flexible production control, even in dusty factory conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple light sources are used to illuminate the article at the same point simultaneously, then measurement completeness and reliability are improved, but device complexity increases
Solution Approach 1:
The continuous rod is divided into discrete measuring sectors, and measurements are taken in segmented time windows corresponding to each sector. This allows the system to use fewer light sources by measuring different sections sequentially as the rod moves through the measurement field, rather than illuminating the entire rod simultaneously with multiple light sources.
Solution Approach 2:
The measurement process uses periodic action by synchronizing measuring time windows with the periodic movement of the continuous rod through the measurement field. Measurements are taken at specific time intervals corresponding to when different sectors pass through the measurement point, allowing reliable measurement with a single light source activated in periodic cycles rather than requiring multiple continuously active light sources.
2Productivity
If high-speed measurement is implemented to match production speed, then productivity is improved, but measurement precision deteriorates due to motion blur and shading
Solution Approach 1:
The system uses preliminary action by receiving advance signals about the position of sector transitions or cutting moments before the measurement actually occurs. This allows the control system to pre-synchronize the measurement timing, ensuring that diameter measurements are taken at the correct moments when specific sectors are in the measurement field, maintaining precision even at high production speeds.
Solution Approach 2:
The system implements feedback by using signals from the cutting head or rod position detection to continuously monitor and adjust the timing of measurements. This feedback mechanism ensures that measuring time windows are accurately synchronized with the actual position and speed of the continuous rod, maintaining measurement precision despite variations in production speed and preventing motion blur.
3Measurement precision
If selective sector measurement is implemented, then measurement precision for critical areas is improved, but measurement time increases
Solution Approach 1:
The system applies local quality by enabling selective measurement of specific sectors along the continuous rod based on their structural characteristics. Different measuring time windows can be configured with different measurement frequencies or accuracies according to the importance and characteristics of each sector, allowing higher precision measurements only where needed rather than uniformly across the entire rod.
Solution Approach 2:
The system uses partial action by measuring only the necessary sectors at high precision rather than measuring the entire continuous rod at maximum precision. The measuring time windows can be configured to focus measurement resources on critical sectors while using reduced measurement frequency for less critical areas, optimizing the balance between measurement precision and time efficiency.
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 enables accurate and flexible diameter measurement of continuous rods, maintaining quality control and measurement frequency, even in harsh environments, by synchronizing measuring sectors and time windows with the rod's structure and speed, ensuring precise and reliable results.
Implementation Method 1
the rod-shaped article is illuminated by all the light sources at one point at the same time so that light is scattered from the surface of the article at the illuminated point
Implementation Method 2
the scattered light is detected by sensors
Data Source
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AI summary
A method of measuring a diameter of a continuous rod (CR) of tobacco industry products (R) comprising steps of: determining measuring sectors (S1, S2, S3, S4) on the continuous rod (CR) in relation with structure of a product (R), determining measuring time windows (T1, T2, T3, T4) in relation with structure of a product (R) and a transfer speed (v) of the continuous rod (CR), measuring the diameter in the determined measuring sectors (S1, S2, S3, S4) in determined measuring time windows (T1, T2, T3, T4), where determined measuring time windows (T1, T2, T3, T4) are synchronized with determined measuring sectors (S1, S2, S3, S4).