Workpiece Surface Detection Using Controlled Mist Condensation
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Solution Overview
Problem
Current methods for detecting defects on high-reflectivity workpiece surfaces using extinction powders are time-consuming and prone to pollution, making them difficult to implement widely.
Innovation Solution
A detecting method and system that control temperature and humidity environments to create a mist on the workpiece surface, allowing for effective inspection without the need for extinction powders, using a combination of air-conditioning modules and a misting module to adjust temperature and humidity levels for optimal surface misting and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If extinction powders are sprayed on the workpiece surface to reduce reflectivity for detection, then the surface defects can be shown clearly, but the powders must be completely removed after inspection which is time-consuming and causes pollution
Solution Approach 1:
The invention changes the physical state parameters of water by controlling temperature and humidity environments. The workpiece is first heated to raise its temperature above the dew point, then cooled to below the dew point, causing water vapor to condense into mist on the surface. This temperature parameter change eliminates the need for powder application and removal, solving the time-consuming removal problem while maintaining detection accuracy.
Solution Approach 2:
The invention utilizes the phase transition of water from vapor to liquid through condensation. By controlling the workpiece temperature to be below the dew point in a humid environment, water vapor in the air condenses into mist that adheres to the workpiece surface. This phase transition creates the needed surface condition for defect detection without requiring powder materials, thereby eliminating powder removal time and pollution issues.
2Measurement precision
If extinction powders are used to reduce surface reflectivity, then defect inspection can be performed, but the process becomes complex and difficult to implement widely
Solution Approach 1:
The invention extracts and eliminates the powder application and removal steps from the detection process. Instead of using extinction powders, the method uses controlled temperature and humidity environments to create mist on the workpiece surface. This simplifies the overall detection process by removing the complex powder handling operations while maintaining the ability to reduce surface reflectivity for effective defect inspection.
Solution Approach 2:
The invention makes the workpiece itself serve as the medium for creating the detection condition. By controlling the workpiece temperature and exposing it to humid air, the workpiece automatically condenses mist on its own surface without requiring external powder application. This self-service approach eliminates the need for powder spraying equipment and removal processes, significantly reducing system complexity.
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 efficient detection of workpiece surfaces with reduced reflectivity, improving inspection efficiency and minimizing production line pollution by creating a controlled misting environment for accurate defect detection.
Implementation Method 1
the workpiece is provided with a second environment, wherein the second environment has a second environmental temperature lower than the first environmental temperature, such that a itself-temperature of the workpiece reduces to a mist temperature
Implementation Method 2
the mist environment has a mist-saturation temperature corresponding to a mist-environmental relative humidity is equal to or higher than the mist temperature for misting a surface of the workpiece
Data Source
AI summary
A detecting method for a workpiece surface includes the following steps. Firstly, a workpiece is provided with a first environment, wherein the first environment has a first environmental temperature higher than a first saturation temperature corresponding to an environmental-relative humidity. Then, the workpiece is provided with a second environment, wherein the second environment has a second environmental temperature lower than the first environmental temperature, such that a itself-temperature of the workpiece reduces to a mist temperature, wherein the mist temperature is substantially equal to or higher than the second environmental temperature. Then, the workpiece is provided with a mist environment, wherein the mist environment has a mist-saturation temperature corresponding to a mist-environmental relative humidity is equal to or higher than the mist temperature for misting a surface of the workpiece. Then, the surface of the misted workpiece is detected.