Operation Switch Erroneous Detection Avoidance via Detecting Switch
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Solution Overview
Problem
Existing operation switch detection methods in multifunctional machines, such as those with NFC capabilities, often lead to erroneous detections when a mobile terminal approaches or interacts with operation switches, causing unintended activation of processes and interfering with normal user operations.
Innovation Solution
The implementation of an operation switch press erroneous-detection avoidance device that uses a detecting switch to determine if an operation switch is pressed by a user or an approaching object, setting a prohibition flag to prevent process activation when the switch is pressed by an object other than the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If NFC reader/writer and operation switches are integrated in the operation panel unit, then the machine gains network connection and NFC capabilities, but the operation switches may be erroneously activated when a mobile terminal approaches
Solution Approach 1:
The detecting switch is activated in advance to monitor the operation switch before the mobile terminal makes contact. This preliminary detection allows the system to identify when a mobile terminal is approaching and potentially causing erroneous activation, enabling preventive measures to be taken before the actual erroneous operation occurs.
Solution Approach 2:
A detecting switch is introduced as an intermediary element between the mobile terminal and the operation switch. This detecting switch monitors the presence and movement of the mobile terminal, providing intermediate information that helps distinguish between intentional user operations and erroneous activations caused by the mobile terminal's proximity or movement.
2Measurement precision
If the operation switch detection is made sensitive to detect mobile terminal approach, then erroneous detections increase, but normal user operations may be missed
Solution Approach 1:
The detection function is segmented into two separate switches: a detecting switch for monitoring mobile terminal approach and an operation switch for actual user operations. This segmentation allows independent optimization of each switch's detection characteristics, enabling the detecting switch to be highly sensitive to mobile terminal presence while the operation switch maintains normal responsiveness to user operations.
Solution Approach 2:
The system dynamically adjusts its response based on the state of the detecting switch. When the detecting switch indicates mobile terminal presence, the system enters a protective mode where operation switch activations are scrutinized. This dynamic adjustment allows the system to maintain high sensitivity during mobile terminal approach while preserving normal operation responsiveness when no mobile terminal is present.
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
Effectively avoids erroneous detections and maintains normal operability by ensuring that processes associated with operation switches are only activated when pressed by a user, preventing interference from external objects.
Implementation Method 1
when a capacitive operation button and the NFC antenna of the NFC reader/writer are close to each other, the mobile terminal such as a smartphone placed for performing the NFC with the NFC reader/writer also covers a vicinity of a switch. In a case where a capacitance detection switch is used as the switch, when the mobile terminal as a conductor covers an upper surface of the switch, capacitance changes
Data Source
AI summary
An operation switch press erroneous-detection avoidance device, if an operation on an operation switch is performed by an approaching object to the operation switch, in a case where the operation on the operation switch is detected during a period when an event which occurs in association with the operation on the operation switch occurs, prohibits a process associated with the operation switch from being activated.