Conveying Device Motor Temperature Prediction
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Solution Overview
Problem
Conventional image scanning devices with auto document feeders (ADF) employing DC motors face challenges in preventing temperature rises and overloading, especially when scanning a small number of documents, as existing control methods are not effective in inhibiting temperature increases accurately, leading to reduced availability and efficiency.
Innovation Solution
A conveying device that predicts motor temperature by using parameters related to its operating state and cumulative revolutions, switching between normal and temperature rise inhibiting modes to prevent motor overheating during continuous document conveyance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If scanning speed is reduced or scanning is halted to control motor temperature, then motor temperature rise is inhibited, but scanning productivity decreases
Solution Approach 1:
The system performs preliminary temperature prediction before actual overheating occurs by calculating motor temperature based on cumulative revolutions and operating parameters. This allows proactive temperature control through mode switching before the motor actually overheats, maintaining productivity while preventing temperature rise.
Solution Approach 2:
The system dynamically switches between normal mode and temperature rise inhibiting mode based on predicted temperature values. This dynamic adjustment allows the system to adapt to changing thermal conditions, maintaining high productivity during normal operation while preventing temperature rise when necessary through calculated mode transitions.
2Reliability
If determination reference is set high to allow maximum document sheets, then availability is improved, but temperature control accuracy deteriorates
Solution Approach 1:
The system continuously monitors cumulative revolutions and operating parameters to predict temperature in real-time. This feedback mechanism allows accurate temperature control regardless of the determination reference setting, as the prediction is based on actual operating conditions rather than predetermined thresholds. This maintains both availability and control accuracy.
Solution Approach 2:
The system changes the control parameter from fixed determination references to dynamic temperature prediction based on cumulative revolutions and operating parameters. This parameter change allows the system to adapt to any document sheet count while maintaining accurate temperature control, resolving the contradiction between availability and control accuracy.
3Ease of operation
If simple control procedure is used for DC motor, then ease of operation is improved, but temperature control accuracy deteriorates
Solution Approach 1:
The system performs self-service temperature prediction by automatically calculating motor temperature based on cumulative revolutions and operating parameters without external intervention. This self-service approach maintains simplicity of operation while achieving accurate temperature control through automated prediction and mode switching.
Solution Approach 2:
The system replaces complex mechanical temperature sensing and control mechanisms with a computational prediction model based on cumulative revolutions and operating parameters. This substitution maintains ease of operation while improving temperature control accuracy through software-based prediction and control.
Data Source
AI summary
Provided are an image scanning device that can prevent a rise in the temperature and overloading or overheating of a conveying motor during continuous conveying of document sheets, and a conveying device that includes the image scanning device. According to the present invention, the temperature of a drive motor and the temperature of the periphery of the drive motor are predicted, and based on the predicted values, the conveying mode is selected.