Dynamic Reference Value for Printer Paper Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional printers face accuracy issues in detecting the presence or absence of printing paper, especially in changing environments, leading to operational errors and inconvenience, particularly in mobile printers where a single reference value is insufficient due to sensitivity to lighting and environmental changes.
Innovation Solution
A method and system where a detection unit collects light measurement values during printing paper transfer, calculates a dynamic reference value based on these measurements, and compares it with real-time values to determine if paper has been removed, allowing for adaptive adjustment to environmental changes without manual user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single fixed reference value is used for paper detection, then the device complexity is low, but the measurement precision deteriorates in changing environmental conditions
Solution Approach 1:
The patent applies dynamics by transitioning from a static fixed reference value to a dynamic reference value that automatically adapts to environmental changes. The detection unit collects multiple light measurement values during paper transfer, and the control unit calculates a dynamic reference value based on statistical processing of these measurements. This dynamic reference value updates automatically in response to environmental variations such as lighting conditions, thereby maintaining high detection accuracy without increasing device complexity.
2Measurement precision
If environmental calibration is performed manually, then the measurement precision improves, but the ease of operation deteriorates
Solution Approach 1:
The patent implements self-service by enabling the detection system to automatically perform calibration and adapt to environmental conditions without user intervention. The control unit automatically collects light measurement values during paper transfer, calculates a dynamic reference value through statistical processing, and updates the reference value in real-time. This self-calibrating mechanism eliminates the need for manual environmental calibration, thereby maintaining high detection accuracy while significantly improving ease of operation.
3Adaptability or versatility
If multiple reference values are stored for different environments, then the adaptability improves, but the device complexity increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the reference value parameter based on real-time environmental conditions rather than storing multiple fixed reference values. The control unit collects light measurement values during paper transfer, processes these values statistically to calculate a dynamic reference value, and uses this updated parameter for detection. This approach provides environmental adaptability while avoiding the complexity of managing multiple stored reference values, as the system automatically generates the appropriate reference value for current conditions.
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 minimizes operation errors and user inconvenience by ensuring accurate detection of printing paper presence or absence, even in dynamic environments, by continuously updating the reference value to match changing conditions.
Implementation Method 1
an optical sensor is disposed on a printing paper discharge portion side, and the presence or absence of printing paper is detected using the difference between the amount of light measured when printing paper is loaded onto a discharge portion and the amount of light measured when printing paper is removed
Data Source
AI summary
A printer includes: a transfer unit configured to transfer printing paper in a printing direction; a printing unit configured to print information on transferred printing paper; a detection unit installed to face discharged printing paper on a printing paper discharge portion side, and configured to acquire measured values by detecting light while printing paper is transferred or when the transfer of printing paper is stopped; and a control unit configured to collect measured values of the detection unit while printing paper is transferred, to calculate a reference value by using the collected measured values, and to determine whether printing paper has been removed by comparing the calculated reference value with a measured value acquired by the detection unit when the transfer of printing paper is stopped.