Microcontroller Electronic Switch for Touchless Spark-Free Control
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Solution Overview
Problem
Existing electronic switches, particularly mechanical and infrared-based solutions, face limitations in safety, complexity, and efficiency for controlling lighting apparatuses and appliances, especially in environments prone to gas explosions and requiring touchless operation.
Innovation Solution
A microcontroller-based electronic switch that utilizes a controllable semiconductor switching element and an external signal sensor to detect user motion, converting it into low voltage sensing signals to control on/off and dimming functions, eliminating the need for physical contact and reducing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical-type electric switch is used for on/off control, then the switching operation is simple and reliable, but electric sparks are generated that can ignite gas explosions
Solution Approach 1:
The patent replaces the mechanical switch system with a solid-state electronic switch system using triacs and microcontrollers. This substitution eliminates the mechanical contact between metal conductors that causes sparking, while maintaining reliable switching functionality through electronic control mechanisms.
Solution Approach 2:
The patent introduces optical coupling elements as intermediaries between the control circuit and the power switching circuit. This intermediary isolates the control side from the high-power side, enabling safe and reliable switching without direct mechanical contact that would generate sparks.
2Ease of operation
If a mechanical toggle or spring button is applied on the electronic switch to facilitate manual operation, then the operation is straightforward, but hand contact is required which is inappropriate in kitchens or hospitals
Solution Approach 1:
The patent replaces mechanical contact-based operation (toggles, buttons) with touchless sensing mechanisms such as infrared sensors, capacitive sensors, or motion detectors. This substitution maintains ease of operation while eliminating the need for hand contact, making it suitable for hygiene-sensitive environments like kitchens and hospitals.
3Ease of operation
If an infrared sensor is used to activate electronic switch for touchless operation, then hand contact is eliminated, but the circuit design becomes complicated
Solution Approach 1:
The patent integrates multiple functions into a single microcontroller unit that handles sensing signal processing, switching control, and timing functions. This multi-functional integration simplifies the overall circuit design by consolidating what would otherwise require separate dedicated circuits for each function.
Solution Approach 2:
The patent merges the sensing circuit, control logic, and power switching control into a unified integrated circuit system. By combining these previously separate functions into one compact unit, the overall device complexity is reduced while maintaining touchless operation capability.
4Productivity
If conventional electronic switches are used for controlling lighting apparatus, then basic on/off function is achieved, but efficient power transmission control and dimming functions are not provided
Solution Approach 1:
The patent implements a universal control system that can perform multiple functions including on/off switching, dimming control, and power transmission optimization through a single integrated circuit. This multi-functional approach enhances both versatility and power transmission efficiency without requiring separate dedicated circuits for each function.
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
The solution provides a safe, efficient, and user-friendly touchless control system for lighting and appliances, enhancing safety by avoiding sparks and simplifying operation through software-defined modes, reducing the risk of contamination and improving power transmission control.
Implementation Method 1
The external signal sensor detects object motion and converts the outcome into message carrying low voltage sensing signals readable to the microcontroller
Implementation Method 2
A controllable semiconductor switching element, such as a triac, has nearly zero voltage between two output-electrodes in conduction mode and nearly zero current through two output-electrodes in cut-off mode
Data Source
AI summary
A microcontroller-based multifunctional electronic switch using a detection circuit design to convert external motion signals into message carrying sensing signals readable to the microcontroller. Based on the time length of sensing signals and the format of the sensing signals received in a preset instant period of time the microcontroller through the operation of its software program codes written in the OTPROM is able to recognize the working modes chosen by the external signal generating user and thereby selecting the appropriate loops of subroutine for execution. The system and method of the present invention may simultaneously be applicable to detection circuit design using infrared ray sensor, electrostatic induction sensor, conduction based touch sensor or push button sensor for performing multifunction such as controlling the on/off switch performance, the dimming or speed control and the delay timer management within the capacity of a single lighting device or an electrical appliance.