Welding Seam Tracking Sensor Purge Flow for Clear Optical Windows
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Solution Overview
Problem
Welding seam tracking sensors face reduced detection performance due to welding fumes and spatters adhering to the sensor protection lens, causing moisture and oil to scatter light and blur images, which is not effectively addressed by existing purge methods that allow unfiltered gas to enter the sensor cavity.
Innovation Solution
A welding seam tracking sensor design featuring a protection cover with an air inlet and blowing hole, a protection sheet with a transverse slot and airflow guide slope, and a touch switch for proper insertion detection, which directs purge gas under the protection sheet to prevent moisture and oil from reaching the sensor windows, ensuring clear light transmission and image acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an air hole is made in the window protection sheet for purging, then purge gas can enter the air channel, but the purge gas cannot be completely filtered and contains moisture and oil that will contaminate the sensor windows
Solution Approach 1:
The patent changes the spatial dimension of the purge gas flow by directing it from below the protection sheet rather than through holes in the sheet itself. This dimensional change allows the purge system to remain simple while preventing contaminated gas from reaching the sensor windows, thus maintaining both ease of manufacture and detection performance
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 prevents moisture and oil from adhering to the sensor windows, maintaining detection performance and extending the service life of the protection sheet by ensuring a clear air path for purge gas, thus reducing maintenance costs and ensuring the sensor operates correctly.
Implementation Method 1
The purge gas enters the air channel below the window protection sheet through the air hole 103 of the window protection sheet 101 from the top of the window protection sheet 101, and is discharged from the laser hole 104 and the visual hole 105 of the installation cover 102
Implementation Method 2
Welding generates a lot of welding fume, spatters and other substances that are not conducive to the detection of the sensor, the welding fume and spatters will adhere to the sensor protection lens
Data Source
AI summary
The present invention provides a welding seam tracking sensor, which belongs to the technical field of sensors, and alleviates the problem of detection performance reduction of a sensor. The welding seam tracking sensor comprises a sensor housing, a protection cover and a protection sheet; the protection cover is mounted on the bottom of the sensor housing, an air inlet is provided on the upper surface of the protection cover, and a blowing hole is provided on the bottom of the sensor housing. The air inlet and the blowing hole is closely connected; there is a visual hole and a laser hole in the bottom of the protection cover, a transverse slot is formed inside the protection cover, a socket is opened on the side wall of the protection cover, the protection sheet is inserted into the slot through the socket.