Welding Glare Shielding with RF-Assisted LCD Transmittance Control
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Solution Overview
Problem
Existing welding masks face issues with slow light shielding speed, sensitivity adjustment errors, and increased power consumption due to continuous operation of light and RF detection means, leading to potential eye damage from high-intensity light and debris during welding operations.
Innovation Solution
A glare protecting apparatus that initiates light shading based on RF detection in the initial state, switches off light detection when light is present, and alternates between RF and light detection to control LCD transmittance, minimizing power consumption and improving shielding speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both light detection means and RF detection means are continuously operated to ensure accurate light shielding, then detection reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic switching between light detection mode and RF detection mode. The light detection means operates during initial welding detection, then switches to RF detection mode for continued monitoring. This periodic operation ensures continuous protection while reducing power consumption by not keeping both detection systems active simultaneously.
2Device complexity
If only light detection means is used to adjust LCD transmittance, then device complexity is reduced, but detection accuracy deteriorates due to interference light and sensitivity adjustment errors
Solution Approach 1:
The patent combines light detection means and RF detection means into an integrated detection system. The light detection means detects optical signals from the welding arc, while the RF detection means detects electromagnetic wave signals. Both detection channels are merged in the control unit, which processes signals from both sources to determine LCD transmittance, thereby improving detection accuracy through multi-parameter monitoring.
3Speed
If light shielding operation is based on light detection signal during initial driving, then response speed is improved, but sensitivity adjustment error occurs due to interference light
Solution Approach 1:
The patent introduces RF detection means as an intermediary verification channel. When the light detection means detects welding light, the control unit also activates RF detection to verify the welding state. The RF signal serves as a mediator to confirm whether the detected light signal corresponds to actual welding activity, filtering out false positives from interference light while maintaining rapid response.
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
Stabilizes eye protection by enhancing light shading speed and reducing power consumption while effectively shielding against high-intensity light generated during welding.
Implementation Method 1
a light sensor (4) provided in the front portion of the glare protecting device (2) detects the light generated by a welding and cutting torch
Implementation Method 2
an electromagnetic wave detection means is operated to monitor a change in an electromagnetic wave signal output from the electromagnetic wave detection means
Data Source
AI summary
A glare protecting apparatus that changes light transmittance of an LCD in order to protect eyes of an operator from light generated from a welding operation, the glare protecting apparatus comprising: a light signal detector that detects light generated during the welding operation by a photosensor; an RF signal detector that detects an RF signal generated during the welding operation via an antenna; a power supply unit that supplies a certain level of drive power to the glare protecting apparatus including the light signal detector and the RF signal detector; an RF detection power-supply switching unit; and a control unit that generates an LCD control signal.