Rolled Sheet Feed Sensor Calibration for Faster Replacement Setup
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Solution Overview
Problem
The existing sheet feeding devices require lengthy sensor adjustments when replacing a rolled sheet, necessitating changes in light emission and reception sensitivity to achieve a predetermined sensor waveform, which prolongs the setup time.
Innovation Solution
A sheet feeding device that rotates the roll in two directions, using a sensor to output values based on the distance between the detecting position and the roll's peripheral surface, with a control unit determining the amplification factor based on data collected during a single rotation, allowing for rapid sensor adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor amplification factor is adjusted by rotating the rolled sheet multiple times and repeating the process, then the sensor can detect sheet peeling accurately, but the adjustment time becomes excessively long
Solution Approach 1:
The control unit performs preliminary analysis of the sensor output waveform during a single rotation to predict the appropriate amplification factor. By pre-processing the data and identifying the peak output value position, the system determines the optimal amplification factor before actual sheet peeling detection begins, eliminating the need for multiple iterative rotations and大幅 reducing adjustment time
Solution Approach 2:
The system creates a simplified model of the sensor output characteristics by analyzing the waveform shape and peak position during one rotation. This copied characteristic data is then used to calculate the appropriate amplification factor without requiring actual physical adjustments through multiple rotations, achieving accurate sensor configuration through data analysis rather than repeated physical testing
2Measurement precision
If the light emission amount or light reception sensitivity is changed during sensor adjustment, then the sensor waveform can be optimized, but the adjustment process requires multiple rotations and repetitions increasing time consumption
Solution Approach 1:
The control unit automatically analyzes the sensor output waveform characteristics during a single rotation and self-determines the appropriate amplification factor without requiring manual intervention or repeated adjustment cycles. The system uses the acquired data including peak output value position and waveform shape to automatically configure the sensor, making the adjustment process self-sufficient and eliminating time-consuming iterative procedures
Solution Approach 2:
The control unit changes the amplification factor parameter based on mathematical analysis of the sensor output waveform rather than through repeated physical adjustments. By calculating the appropriate amplification factor from the peak output value position and waveform characteristics obtained during one rotation, the system optimizes sensor performance through parameter computation instead of iterative physical tuning
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 quick sensor adjustment regardless of the remaining sheet amount or type, reducing the time required for detecting sheet peeling and enhancing the efficiency of the sheet feeding process.
Implementation Method 1
an optical sensor disposed in the vicinity of the roll detects sheet peeling and separation of the sheet leading end, under its own weight, from the roll
Data Source
AI summary
A sheet feeding device includes a drive unit that rotates a roll of a wound sheet in a first direction and in a second direction, a sensor having an output which changes according to a distance between a detecting position facing a peripheral surface of the roll and the peripheral surface of the roll, and a control unit that determines an amplification factor of the sensor on the basis of data. The data is acquired by changing the amplification factor while the roll is rotated once in the second direction and includes a plurality of the output values acquired at different rotation angles.