Image Sensor Recovery Control After Power Loss and Scan Path Errors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Digital copiers experience errors due to image sensors stopping at abnormal positions after power interruptions or mechanical errors, leading to forced movement and collisions when power is re-supplied, causing operational errors.
Innovation Solution
A method to control the image sensor's operation by acquiring image information from its upper part, determining its position, and moving it to the home position by a certain distance, using a home sensing label and a controller to prevent collisions with the scanning path's walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the image sensor is forcibly moved to return to home position after power interruption, then the image sensor can resume normal operation, but the image sensor may collide with the right wall causing mechanical error
Solution Approach 1:
The system performs preliminary scanning of the upper part area before moving the image sensor to the home position. By detecting whether the home sensing label is present in the scanned area, the system determines the image sensor's position relative to the home position and adjusts the movement accordingly, preventing collision with the right wall while ensuring successful operation resumption
Solution Approach 2:
The system uses feedback from scanning the upper part area to detect the home sensing label and determine the image sensor's current position. Based on this feedback information, the controller adjusts the movement distance and direction of the image sensor, enabling safe return to home position without collision
2Ease of operation
If the image sensor stops at abnormal position due to mechanical error or power interruption, then operation is halted, but forced movement causes collision and further errors
Solution Approach 1:
The system enables the image sensor to automatically recover from abnormal positions without manual intervention. By scanning the upper part area and detecting the home sensing label, the system self-determines the image sensor's position and autonomously controls its movement to the correct home position, achieving ease of operation while maintaining reliability
Solution Approach 2:
Before executing the movement to home position, the system performs preliminary scanning of the upper part area to detect the home sensing label. This preliminary action allows the system to determine the image sensor's current position and plan the appropriate movement, ensuring automatic recovery without collision
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
Prevents image sensor collisions with the scanning path's walls by accurately repositioning it when power is restored, thus avoiding errors and ensuring smooth operation.
Implementation Method 1
The moving image sensor 74 emits an optical signal (light) onto a document 76 which is placed on the platen glass 78, and receives through an image reading part 75 a signal corresponding to the light reflected from the document 76
Data Source
AI summary
A method of controlling an operation of an image sensor when the image sensor stops due to a mechanical error or a power interruption while moving along a scanning path in a certain direction to scan a document in an apparatus having a scanning function, and when the power is re-supplied, includes acquiring image information of an upper part of the image sensor by scanning the upper part of the stopped image sensor, determining a position of the image sensor based on the image information of the upper part of the image sensor, and controlling the image sensor to move to a home position by moving the image sensor to a right side by a certain distance and re-scanning a home sensing label when the image sensor is located in the home position and at a left side of the home position, or controlling the image sensor to move toward the home position when the image sensor is located in a right side of the home position.