Light Curtain Installation via Reference Pixel Feedback
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Solution Overview
Problem
Adjusting and verifying the installation state of a light curtain with respect to an image plane is challenging due to the plane-shaped light radiation, making it difficult to ensure proper alignment and detection of objects, especially when ambient light interferes with the edges of the image plane.
Innovation Solution
A method that includes determining the ability to detect an object at a target region using a reference pixel, changing its drive state based on detection, and displaying markers on the image plane to indicate correct or incorrect detection, allowing users to easily adjust and verify the light curtain's installation by observing changes in the display state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the light curtain radiates light in a plane shape to detect objects, then the detection coverage is improved, but the difficulty of adjusting the position and posture of the light curtain with respect to the image plane increases
Solution Approach 1:
The system displays the detection result image on the image plane to provide visual feedback during adjustment. This allows the installer to see which regions are being detected by the light curtain and adjust the position and posture accordingly, making the adjustment process straightforward despite the plane-shaped light radiation pattern.
2Measurement precision
If the light curtain is installed at a correct position with correct posture, then the detection accuracy is improved, but the complexity of checking whether light from outside the image plane region is detected increases
Solution Approach 1:
The system performs self-checking by displaying the detection result image on the image plane itself. The image plane shows which regions are detected, allowing the installer to verify that only the intended regions are detected and that no extraneous light from outside the image plane is being detected, eliminating the need for separate checking equipment or procedures.
3Ease of operation
If the drive state of the reference pixel is changed to indicate detection capability, then the ease of checking installation state is improved, but the device complexity increases
Solution Approach 1:
The image plane serves multiple functions: it displays the normal image content and simultaneously displays the detection result image to indicate the light curtain's installation state. By utilizing the existing image plane for dual purposes, the system provides visual feedback for adjustment without adding separate indicator devices or increasing overall 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 simple and efficient adjustment and verification of the light curtain's installation by allowing users to recognize detection capabilities through visual changes on the image plane, reducing errors and ambient light interference, especially at the image plane's edges.
Implementation Method 1
a light-emitting unit that is installed with respect to an image plane and radiates light in a plane shape
Implementation Method 2
receives and photoelectrically converts direct or reflected light of the light radiated from the light-emitting unit
Implementation Method 3
a light-receiving unit that receives and photoelectrically converts direct or reflected light of the light radiated from the light-emitting unit
Data Source
AI summary
A light curtain installation method, which is a method for adjusting or checking an installation state of a light curtain for detecting an operation with respect to an image plane of a display apparatus, includes: determining whether or not it is possible to detect an object that comes into contact with a target region on the image plane which corresponds to a reference pixel which is a pixel at a predetermined position; and setting a drive state of the reference pixel such that the drive state of the reference pixel is different depending on a result of the determining.