Resonant Coil Sensing for Welding Wire Diameter and Composition
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Solution Overview
Problem
Conventional welding devices lack a reliable method to detect the diameter and composition of welding wires or electrodes, leading to potential reductions in welding quality and safety issues due to the use of unsuitable filler metals.
Innovation Solution
A method and device utilizing an oscillating circuit with a coil to determine oscillating circuit parameters such as quality factor, eddy current losses, and signal frequency, allowing for the detection of welding wire diameter and composition by comparing these parameters with reference values stored in a memory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional welding equipment is used without detection methods, then the device complexity is low, but the reliability of welding quality is reduced due to inability to detect wire diameter and composition
Solution Approach 1:
The patent replaces manual visual inspection and physical measurement methods with an automated oscillating circuit detection system. The resonant circuit automatically measures wire diameter and composition by detecting changes in resonant frequency and quality factor, eliminating the need for manual intervention and providing consistent, reliable measurements that improve welding quality while maintaining acceptable device complexity.
Solution Approach 2:
The detection device performs self-calibration and automatic measurement without requiring external reference standards or manual setup. The system uses the wire itself as the measurement object, and the oscillating circuit automatically adjusts and records parameters, enabling the device to serve itself in maintaining measurement accuracy and reliability.
2Measurement precision
If manual inspection methods are used to verify welding wire properties, then the device complexity is low, but the measurement precision is insufficient leading to quality issues
Solution Approach 1:
The patent transforms physical properties of the welding wire (diameter, composition, magnetic properties) into electrical parameters (resonant frequency, quality factor) that can be precisely measured. By changing the measurement domain from mechanical/chemical to electrical, the system achieves high measurement precision for wire characteristics while keeping the detection system relatively simple and integrated into existing welding equipment.
Solution Approach 2:
The patent employs a strongly damped oscillating circuit that rapidly dissipates energy, creating a sharp, well-defined resonant peak. This accelerated energy dissipation allows for precise determination of resonant frequency and quality factor, thereby improving measurement precision for wire diameter and composition detection.
3Productivity
If welding parameters are manually set without automatic detection, then the ease of operation is high, but the productivity is reduced due to manual setup time and potential errors
Solution Approach 1:
The patent implements a feedback loop where the oscillating circuit continuously monitors wire diameter and composition, and this information automatically feeds back to adjust welding parameters. The system compares measured values with predetermined specifications and automatically modifies welding current, voltage, or speed to maintain optimal welding conditions, thereby improving productivity while keeping operation simple through automatic control.
Solution Approach 2:
The detection system performs preliminary measurement and verification of wire properties before the welding process begins. By detecting wire diameter and composition in advance and pre-adjusting welding parameters accordingly, the system eliminates during-process adjustments and rework, thereby improving overall productivity and welding efficiency.
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
Enables accurate detection of welding wire characteristics, ensuring suitable filler metals are used, thereby improving welding quality and safety by automatically adjusting welding parameters and providing feedback to users.
Implementation Method 1
at least one first resonant circuit parameter which is characteristic for a damping of a vibration signal occurring in the resonant circuit... the welding wire is demagnetized by the coil of the resonant circuit
Implementation Method 2
Guiding the welding wire through a coil which forms a resonant circuit with a capacitor, determining at least one first resonant circuit parameter characteristic of damping a vibration signal occurring in the resonant circuit
Implementation Method 3
Guiding the welding wire through a coil which forms a resonant circuit with a capacitor, determining at least one second resonant circuit parameter which is characteristic for a signal frequency of the oscillation signal occurring in the resonant circuit
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A detection apparatus (1) for detecting a diameter and/or a composition of a welding wire (5) and/or a welding electrode (5) for a welding device, the detection apparatus (1) having: an oscillating circuit (2) which has a coil (2A), through which the welding wire (5) and/or the welding electrode (5) is guidable; and an evaluation unit (3), connected to the oscillating circuit (2), for establishing at least one first oscillating circuit parameter (SKP1), which is characteristic for a damping of an oscillation signal occurring in the oscillating circuit (2), and at least one second oscillating circuit parameter (SKP2), which is characteristic for a signal frequency, f, of the oscillation signal occurring in the oscillating circuit (2), wherein the evaluation unit (3) detects the diameter and/or the composition of the welding wire (5) and/or welding electrode (5) guided through the coil (2A) of the oscillating circuit (2) on the basis of the established oscillating circuit parameters (SKP1, SKP2).