Contact Status Detection in Image Forming Apparatus Chips
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Solution Overview
Problem
Existing image forming apparatuses face issues with determining whether the terminals on the chip and pins on the main body are in a desired contact, leading to poor signal transmission due to deformation, looseness, improper installation, or dirty surfaces, which can result in data distortion and unreliable communication.
Innovation Solution
An electrical parameter detection method is implemented, where the image forming apparatus configures its installation detecting pin to a high level and the chip's installation detecting terminal to a low level, forming a current loop to determine the contact status based on electrical parameters, ensuring accurate detection of desired contact between the chip and the image forming apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminals at the chip side and the pins at the main body side are in elastic contact to enable communication, then signal transmission is possible, but contact reliability deteriorates due to pin deformation, looseness, dirty surfaces, and improper installation over time
Solution Approach 1:
The patent applies preliminary action by performing contact status detection before normal communication operations. The detection module checks whether the terminals and pins are in desired contact prior to data transmission, allowing poor contact conditions to be identified and addressed in advance, preventing communication failures caused by pin deformation, looseness, or contamination
Solution Approach 2:
The patent replaces mechanical contact assessment with electrical parameter detection. Instead of relying on physical inspection or mechanical feedback, the system uses electrical characteristics (voltage, current, or resistance measurements) to objectively evaluate contact quality, providing a more sensitive and automated method to detect poor contact conditions
2Reliability
If poor contact between terminals and pins occurs, then physical contact is maintained, but signal transmission quality deteriorates due to increased contact resistance and RC time constant
Solution Approach 1:
The patent substitutes electrical parameter measurement for signal transmission testing. By measuring contact resistance or RC time constant separately, the system can assess contact quality without the interference of active signal transmission, enabling more precise detection of contact degradation before it affects communication integrity
Solution Approach 2:
The patent introduces an intermediary detection module that acts as a mediator between the physical contact interface and the communication system. This module performs intermediate electrical measurements to evaluate contact quality, providing feedback that allows the system to adjust or alert before actual communication is compromised
3Measurement precision
If voltage detection is performed on the installation detecting pin, then contact status can be determined, but system complexity increases due to additional detection circuits and control logic
Solution Approach 1:
The patent applies universality by designing the detection module to serve multiple functions: it can measure voltage, current, or resistance depending on the configuration, and can detect various contact issues including poor contact, short circuits, and open circuits. This multi-functional approach reduces overall system complexity by consolidating detection capabilities into a single versatile module rather than requiring separate circuits for each measurement type
Solution Approach 2:
The patent utilizes parameter changes by switching between different electrical measurement modes (voltage, current, resistance) based on the detection needs. The detection module can change its operating parameters to adapt to different contact scenarios, enabling accurate detection across various contact conditions without requiring fundamentally different detection circuits for each parameter
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 method accurately determines the contact status between the chip and the image forming apparatus, preventing data distortion and ensuring stable communication by identifying and addressing poor contact issues, thereby maintaining the effectiveness of data transmission.
Implementation Method 1
configuring, by the image forming control unit, the installation detecting pin to be at a high level; controlling, by the chip control unit, a voltage of the installation detecting terminal to be at a low level directly, such that a current loop is formed between the image forming apparatus and the chip
Data Source
AI summary
The present disclosure provides an electrical parameter detection method, a chip, a consumable, and an image forming apparatus. The electrical parameter detection method includes: configuring an installation detecting pin to be at a high level by an image forming control unit; controlling a voltage of an installation detecting terminal to be at a low level by a chip control unit, such that a current loop is formed between the image forming apparatus and the chip; and determining, by the image forming apparatus, whether the image forming apparatus is in a desired contact with the chip according to an electrical parameter of the current loop.