Welding Measurement Synchronization Against Coupled Current Interference
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Solution Overview
Problem
Welding processes with multiple devices can experience unstable conditions due to electromagnetic and ohmic coupling, leading to incorrect measurement of welding variables, which affects the control and regulation of the welding process, especially when devices with changing welding currents are in close proximity.
Innovation Solution
Implementing synchronization information between welding devices to ignore measured values during device current changes, ensuring that the welding process is not negatively influenced by other electrical devices, thereby maintaining a stable welding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple welding machines operate simultaneously in close proximity, then welding productivity increases, but measurement precision of welding variables deteriorates due to electromagnetic and ohmic coupling
Solution Approach 1:
The patent applies preliminary action by sending synchronization information from the first welding machine to the second welding machine before the measurement disturbance occurs. The second welding machine uses this advance information to identify when measurements will be affected by electromagnetic coupling and excludes those measurements, thereby maintaining measurement precision while allowing simultaneous operation of multiple welding machines
Solution Approach 2:
The patent introduces synchronization information as an intermediary between the two welding machines. This intermediary carries timing data that allows the second welding machine to distinguish between valid measurements and those corrupted by electromagnetic coupling from the first welding machine, thus resolving the measurement precision issue without reducing productivity
2Productivity
If multiple welding machines operate simultaneously in close proximity, then welding productivity increases, but welding process stability deteriorates due to electromagnetic and ohmic coupling
Solution Approach 1:
The synchronization information is sent in advance to alert the second welding machine about upcoming current changes in the first welding machine. This allows the second welding machine to proactively exclude measurements taken during periods of electromagnetic interference, maintaining process stability while enabling simultaneous high-productivity operation of multiple machines
Solution Approach 2:
The patent implements feedback by using synchronization information to continuously adjust measurement acceptance decisions. The second welding machine receives timing information from the first welding machine and uses this feedback to dynamically determine which measurements to accept or exclude, thereby maintaining stable welding control despite the presence of multiple simultaneously operating machines
3Device complexity
If a common ground wire is used for multiple welding machines, then device complexity is reduced, but measurement precision deteriorates due to ohmic coupling and potential fluctuations
Solution Approach 1:
The synchronization information mechanism works in conjunction with the common ground wire configuration to preemptively identify measurement periods that will be affected by ohmic coupling. By knowing in advance when current changes occur in other machines, the system can exclude only those specific measurements, thereby maintaining precision despite the simplified common ground wire setup
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 approach prevents the adverse effects of electromagnetic and ohmic coupling on welding variable measurements, resulting in a more stable and accurate control of welding processes, even when multiple welding devices are operating simultaneously.
Implementation Method 1
the at least one welding machine detects an electrical measurement variable in a welding circuit for controlling the welding process
Implementation Method 2
Welding involves striking an electric arc between the electrode of the welding torch and the workpiece in the usual way with any welding machine. The arc partially melts the workpiece, creating a weld pool. Simultaneously, the arc melts a filler material
Implementation Method 3
The arc partially melts the workpiece
Implementation Method 4
a time-varying device current flows in a device circuit at least at one time... prevents the adverse effects of electromagnetic and ohmic coupling on welding variable measurements
Implementation Method 5
A shielding gas is usually used to protect the weld pool from the ambient air
Data Source
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AI summary
The aim of the invention is to ensure a stable welding process for a welding method in which at least one welding tool (B) is used for welding. During the welding process carried out using the welding tool (B), synchronization information (Y) is transmitted to the at least one welding tool (B) from at least one other electric device (EG), in which a device current (IEG) that changes over time flows in a device current circuit at least at one point in time, and the at least one welding tool (B) is designed to use the obtained synchronization information (Y) in order to ignore measurement values detected at the point in time for the measurement variable.