Multi-Position Humidity Detection for Paper Machine Band Control
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Solution Overview
Problem
Traditional paper making machines lack a reliable method to diagnose the conditions of circulating bands, leading to inaccurate assessments and resulting in quality and energy inefficiencies.
Innovation Solution
An apparatus with detecting devices to measure humidity at multiple positions along the bands, coupled with a processing unit to calculate band conditions, allowing for inter-correlation of data and precise regulation of pressing and conditioning stations to optimize humidity and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional single-point humidity and permeability measurement devices are installed on the paper making machine, then the band conditions can be monitored, but the diagnosis reliability is insufficient due to inability to inter-correlate data
Solution Approach 1:
The invention divides the band monitoring into multiple measurement sections along the band's circulation path. Multiple humidity sensors (first humidity sensor, second humidity sensor) are positioned at different locations to detect humidity values at various points, enabling segmented data collection that can be inter-correlated for reliable diagnosis
Solution Approach 2:
The system continuously monitors humidity values at multiple positions and feeds this data back to a control unit that processes and inter-correlates the information. This feedback mechanism enables real-time assessment of band conditions by comparing humidity variations across different sections, improving diagnosis reliability
2Reliability
If multiple detecting devices are installed to measure humidity at multiple positions, then data inter-correlation for reliable diagnosis is achieved, but the device complexity increases
Solution Approach 1:
The control unit serves multiple functions: it receives data from multiple humidity sensors, processes the signals, inter-correlates the data from different positions, and generates diagnostic information about band conditions. This multi-functional approach consolidates complexity into a single processing unit rather than requiring separate systems for each function
Solution Approach 2:
The invention combines multiple humidity detection functions into a unified monitoring system where several sensors are integrated with a common control unit. The control unit merges the data streams from different sensor positions and performs joint analysis, reducing overall system complexity compared to separate independent monitoring systems
3Ease of manufacture
If band conditions are not accurately monitored, then the apparatus remains simple, but paper quality and energy efficiency deteriorate
Solution Approach 1:
The system performs preliminary monitoring of band humidity conditions at multiple positions before pressing operations occur. By detecting humidity values upstream and analyzing band condition trends in advance, the system can predict when band performance may deteriorate, allowing preventive maintenance or parameter adjustments before quality issues arise in the paper product
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
Enables reliable diagnosis of band conditions, improving paper quality and reducing energy consumption by optimizing the humidity levels during pressing and conditioning phases, thereby enhancing machine efficiency and productivity.
Implementation Method 1
a detecting device (29) configured to detect a second value indicative of the humidity of the band (4) in a second position (b2) along said first closed annular path
Data Source
AI summary
An apparatus for controlling the conditions of at least one band circulating in a paper making machine along a circulation direction is provided with at least one first detecting device configured to detect at least one first parameter indicative of the humidity of the band and positionable in a first position between a pressing station and a conditioning station of the paper making machine; at least one second detecting device configured to detect at least one second parameter indicative of the humidity of the band and positionable in a second position downstream of the conditioning station; and at least one processing unit configured to determine at least one datum indicative of the condition of the band on the basis of the first parameter indicative of the humidity and of the second parameter indicative of the humidity.