Light Shielding Device for TIG Welding Temperature Measurement
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Solution Overview
Problem
High-temperature object observation devices face challenges in accurately measuring temperature distributions due to interference from radiated light emitted by heat sources, particularly in scenarios like TIG welding, where the heat source's intense radiation causes noise that hinders precise temperature measurement.
Innovation Solution
A high-temperature object observation device equipped with a camera and a light shielding device that includes a light shielding part, a holding part, and an actuator. The light shielding device covers the heat source immediately after activation, allowing the camera to capture images of the observation region without radiated light interference, enabling accurate temperature distribution measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a non-contact optical temperature measurement method is used to measure temperature distribution, then temperature measurement capability is improved, but measurement precision deteriorates due to radiated light from the heat source serving as noise
Solution Approach 1:
The light shielding member extracts and removes the harmful radiated light from the heat source from the optical path between the heat source and the camera. By physically blocking the radiated light with the light shielding member positioned between the TIG electrode and the camera, only the light from the observation region reaches the camera, thereby eliminating the noise interference and improving temperature measurement accuracy.
2Measurement precision
If a light shielding member is installed to block radiated light, then measurement precision is improved, but device complexity increases and installation becomes difficult
Solution Approach 1:
The light shielding member is merged with the existing TIG torch structure, forming an integrated assembly. The light shielding member is configured to be held by the TIG torch, and the entire assembly (TIG torch with integrated light shielding member and electrode) is mounted on the welding robot arm. This merging eliminates the need for separate installation of the light shielding member and simplifies the overall structure.
Solution Approach 2:
The TIG torch structure itself serves the dual function of holding both the electrode and the light shielding member. The light shielding member is automatically positioned and held by the TIG torch without requiring separate mounting mechanisms, making the system self-sufficient and easier to install.
3Measurement precision
If the camera is positioned to avoid radiated light reflection, then measurement precision is improved, but device complexity increases due to installation position restrictions
Solution Approach 1:
Instead of restricting the camera position, the light shielding member extracts and removes the radiated light from the optical path. This allows the camera to be positioned in the standard observation position without worrying about radiated light interference, as the light shielding member blocks the harmful light before it can reach the camera.
Solution Approach 2:
The light shielding member acts as an intermediary element between the heat source and the camera. It mediates the optical path by selectively blocking radiated light from the heat source while allowing light from the observation region to pass through to the camera, thereby eliminating the need for complex camera positioning arrangements.
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
The solution effectively removes the influence of radiated light from the heat source, allowing for high-accuracy temperature measurement and easy installation of the light shielding device without requiring precise alignment, thus enhancing the measurement accuracy and operational simplicity.
Implementation Method 1
the temperature of the object to be measured is detected using thermal radiation (radiated light) from the object to be measured
Implementation Method 2
a light shielding part that covers a vicinity of the heat source
Data Source
AI summary
Provided is a high-temperature object observation device including a camera capable of acquiring an image of an observation region adjacent to a heat source and a light shielding device. In the high-temperature object observation device, a light shielding device includes a light shielding part that covers the vicinity of the heat source, a holding object that holds the heat source at a position exposed from the light shielding part, and an actuator that releases engagement of the holding object, and immediately after the light shielding device is brought into operation and the heat source is covered with the light shielding part, the camera acquires an image of the observation region.