Welding Helmet Current Display Using Wireless Hall Sensing
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Solution Overview
Problem
Existing welding monitoring systems fail to independently display the instantaneous current strength of the welding process to the welder, limiting real-time feedback on material flow and weld pool size without requiring additional devices or complex setup.
Innovation Solution
A WLAN-connected client-server system using a Hall sensor and battery-powered transmitter and receiver, which projects current values onto a welding helmet's privacy screen or display, ensuring easy attachment and universal use without additional power connections or interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a current sensor is integrated into the welding equipment, then the instantaneous current can be measured, but the measurement data cannot be independently displayed to the welder without additional display devices
Solution Approach 1:
A wireless communication intermediary (transmitter and receiver system) is introduced to bridge the gap between the current sensor integrated in the welding equipment and the display device. The transmitter receives current data from the sensor and wirelessly transmits it to the receiver, which then displays the information. This intermediary system enables independent display without direct physical connection, resolving the contradiction between data availability and system complexity.
2Ease of operation
If additional power connections are made for the display system, then the display can be powered, but the universal usability and ease of attachment are reduced
Solution Approach 1:
The display system is designed with its own independent power supply (battery or accumulator) that does not require connection to the welding equipment's power system. This self-service approach allows the display unit to be freely attached and detached without worrying about power connections, maximizing ease of operation and universal usability while maintaining adequate energy supply through the onboard battery.
3Productivity
If the display is integrated into the welding helmet visor, then the welder has immediate access to current information, but the system requires specific mounting locations and reduces adaptability
Solution Approach 1:
The display system is segmented into separate functional components: a transmitter unit that attaches to the welding equipment, and a receiver/display unit that can be independently positioned. This segmentation allows the display function to be separated from fixed mounting requirements, enabling the receiver to be attached to various locations including the welding helmet, hand shield, or other surfaces, thereby maintaining real-time feedback capability while significantly improving adaptability and equipment compatibility.
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
Provides the welder with continuous, accurate, and reliable real-time feedback on current strength and material flow, enhancing weld quality and usability across different workstations and equipment.
Implementation Method 1
A Hall sensor and battery-powered transmitter and receiver
Data Source
Figure 1
AI summary
A current indicator 1 for a welding helmet 2 comprises a current sensor 3, which encompasses a power cable of a welding transformer, a transmitter 4 connected to the current sensor 3, and a receiver 5, which is mounted in the welding helmet 2. The transmitter 4 acts as a client 6 and the receiver 5 as a server 7. Client 6 and server 7 are permanently and consistently wirelessly connected via WLAN. The server 7 projects the received current values onto a visor 8 of the welding helmet 2 or onto its own display. The server 7 is mounted in the welding helmet 2 or on a hand-held shield. Client 6 and server 7 communicate using a transmission protocol tailored to them. Preferably, the current sensor 3 is designed as a Hall sensor 8. Client 6 and server 7 each have their own power supply, consisting of a battery or rechargeable battery.