Welding Shield Interlock Using Head and Lens Position Detection
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Solution Overview
Problem
Current welding shields lack interlocking mechanisms with welding machines, leading to safety hazards when not worn correctly or positioned improperly, as they do not prevent the welding machine from operating unless manually locked, which can result in eye and face damage from sparks.
Innovation Solution
A protective device with an inductive detection module, position detection module, and transmission module that uses sensors to ensure the shield is correctly positioned before allowing the welding machine to unlock, featuring a determination module to generate an unlocking signal only when parameters are within a preset range, along with a warning module to alert operators of improper wear or position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If welding machines are allowed to operate without interlocking mechanisms, then productivity and ease of operation are improved, but safety and reliability deteriorate due to potential eye and face damage from improper shield usage
Solution Approach 1:
The system performs preliminary detection of shield presence and filter lens position before allowing the welding machine to operate. The inductive detection module and position detection module check conditions in advance, and only when all parameters are within the preset range does the determination module generate an unlocking signal, ensuring safety prerequisites are met before welding begins
Solution Approach 2:
The system continuously monitors shield and filter lens position through detection modules and provides feedback to the determination module. When parameters deviate from the preset range, the system generates warning signals and prevents machine operation, creating a closed-loop control system that maintains safety conditions throughout the welding process
2Reliability
If detection modules and interlocking mechanisms are added to welding shields, then safety and reliability are improved, but device complexity increases
Solution Approach 1:
The shield integrates multiple functions into a single device: protection against welding radiation, inductive detection of shield presence, position detection of the filter lens, and interlocking control of the welding machine. This multi-functional integration reduces the need for separate safety devices and simplifies the overall system architecture
Solution Approach 2:
The determination module acts as an intermediary that receives detection parameters from multiple detection modules, evaluates them against preset ranges, and generates control signals. This intermediary layer simplifies the control logic by centralizing the decision-making process and providing a clear interface between detection and execution components
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
Ensures safe operation by automatically unlocking the welding machine only when the shield is correctly worn and positioned, reducing injury risks and enhancing the reliability and safety of welding operations through automatic control and interlocking.
Implementation Method 1
an ultrasonic ranging sensor
Implementation Method 2
a photoelectric switch sensor
Implementation Method 3
a capacitive detection sensor
Implementation Method 4
an infrared sensor
Implementation Method 5
a Hall position sensor
Implementation Method 6
a mechanical switch
Implementation Method 7
a photoelectric switch
Data Source
AI summary
The invention relates to the technical field of welding machine protection, specifically a protective device for interlocking welding machines, a design method, and a shield. The device includes: an inductive detection module to detect the relative position between the shield and a human head; a position detection module to detect the filter lens position relative to the shield; a determination module connected to both detection modules to check if all parameters are within a preset range, converting them into an unlocking signal if so; and a transmission module to send this signal to the welding machine, allowing operator control after unlocking. The invention enhances safety, reduces injury risks, and offers reliable protection, with advantages like high safety, automatic control, and effective interlocking.