Capacitive Touch Sensor for Vibration-Resistant Soldering Iron Activation
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Solution Overview
Problem
Existing soldering systems with motion or acceleration sensors can be inadvertently activated by environmental vibrations, leading to potential user danger or equipment damage, as these sensors fail to distinguish between actual use and external movements.
Innovation Solution
The use of touch-sensitive keys with capacitive, resistive, or inductive sensors to detect the use of the soldering iron, which are insensitive to environmental vibrations, providing a reliable and robust alternative for recognizing user interaction and preventing erroneous activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If motion or acceleration sensors are used to detect use of the soldering iron, then the soldering iron can be activated automatically when picked up, but environmental vibrations can cause erroneous activation leading to safety hazards
Solution Approach 1:
The patent replaces motion/acceleration sensors (mechanical detection system) with a capacitive touch sensor system that detects electrical field changes when a finger contacts the sensor area. This substitution eliminates the problem of vibration-induced false activation while maintaining automatic activation capability, as capacitive sensors respond to direct contact rather than environmental vibrations.
Solution Approach 2:
The patent changes the detection parameter from mechanical motion/acceleration to electrical field interaction (capacitance). By monitoring changes in electrical field characteristics when a user's finger approaches or contacts the sensor area, the system achieves reliable detection of intentional use without responding to environmental vibrations, thus resolving the reliability issue.
2Ease of manufacture
If touch-sensitive keys are used on the control panel, then dirt deposits can be reduced, but the keys need to be sufficiently large for easy operation
Solution Approach 1:
The patent implements a large-area capacitive touch sensor that serves multiple functions: it acts as both the operational input interface and a visually distinct target for users. The sensor area is made sufficiently large to ensure easy operation while maintaining a smooth, sealed surface that resists dirt accumulation, achieving both requirements simultaneously through multi-functional design.
Solution Approach 2:
The patent uses the capacitive touch sensor surface to create a visual representation or indication of the activation area, allowing users to easily identify where to touch without requiring physical protrusions or large mechanical buttons. This copying approach maintains a clean, sealed surface while providing clear operational guidance.
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 solution effectively prevents erroneous detection of use by environmental vibrations, ensuring safe and reliable operation of the soldering system, with improved robustness and reduced risk of damage or user safety issues, while also allowing for ergonomic and efficient handling.
Implementation Method 1
The soldering iron (1) comprises one or more touch-sensitive sensors (4) with a capacitive, resistive or inductive measuring electrode (5) in order to detect use of the soldering iron (1)
Implementation Method 2
The soldering iron (1) comprises one or more touch-sensitive sensors (4) with a capacitive, resistive or inductive measuring electrode (5) in order to detect use of the soldering iron (1)
Implementation Method 3
The soldering iron (1) comprises one or more touch-sensitive sensors (4) with a capacitive, resistive or inductive measuring electrode (5) in order to detect use of the soldering iron (1)
Data Source
Figure 1~2
Figure 3~4
AI summary
The soldering system has a soldering iron (1) comprising a contact sensitive sensor (4) and a cylindrical capacitive, resistive and/or inductive measuring electrode (5). A soldering station comprises contact-sensitive keys for recognizing use of soldering iron or enabling setting of different operational parameters of soldering system. The electrode is made of metal or graphite and is antistatic. The soldering iron is provided with a handgrip (2) with a soldering tip case (3) for accommodating an interchangeable soldering tip (9).