Multi-optical Axis Sensor Peak Value Display for Alignment
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Solution Overview
Problem
Existing multi-optical axis photoelectronic sensors lack the ability to accurately determine if further adjustments can increase light receiving quantity during alignment, leading to potential inaccuracies in optical axis alignment and stability in light detection.
Innovation Solution
A multi-optical axis photoelectronic sensor that includes a representative value acquiring unit, peak value storage unit, and output unit to display the relationship between the current light receiving quantity and peak values, allowing workers to assess the possibility of further increasing light receiving quantity and ensuring accurate alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light receiving quantity is increased to exceed the displayable range, then the margin with respect to the light entering threshold value is improved, but it becomes difficult to judge to what extent the light receiving quantity can be increased
Solution Approach 1:
The patent introduces a second display dimension by showing both the current light receiving quantity and the peak light receiving quantity separately. This dimensional separation allows workers to see not only the current value but also the maximum achievable value, providing judgment information even when values exceed traditional display ranges.
Solution Approach 2:
The patent implements feedback by displaying the peak light receiving quantity that was previously obtained during adjustment. This feedback mechanism allows workers to compare current performance against the best achieved performance, enabling informed decisions about whether further adjustment is beneficial.
2Measurement precision
If conventional display methods are used showing only current light receiving quantity, then device complexity is reduced, but measurement precision of alignment accuracy is insufficient
Solution Approach 1:
The patent segments the display information into two distinct components: current light receiving quantity and peak light receiving quantity. This segmentation allows each value to be displayed and interpreted independently, providing precise alignment information without requiring complex comparative analysis.
Solution Approach 2:
The patent uses the peak light receiving quantity as an intermediary reference value that mediates between the current measurement and the ideal alignment state. This intermediary provides a concrete target for adjustment while maintaining simple display architecture.
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 high-accuracy optical axis adjustment by allowing workers to easily determine if further adjustments can improve light receiving quantity, ensuring stable detection and alignment.
Implementation Method 1
a light projector in which a plurality of light emitting elements is arranged in a line
Implementation Method 2
the light receiving quantity of the corresponding light receiving element is measured
Data Source
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AI summary
This invention enables a worker, who performs a work for optical axis adjustment, to easily grasp whether adjustment for further increasing the light receiving quantity is possible. In a multi-optical axis photoelectronic sensor, a minimum value of the light receiving quantities obtained for every optical axis is detected every time a process of measuring, chile lighting each light emitting element 10 by turns, the light receiving quantity of a light receiving element corresponding to a lighted light emitting element 10 is repeated for one cycle, and a peak value of the minimum light receiving quantities detected in the past is detected. A bar graph based on specific values of the most recent minimum light receiving quantity and the peak value, or a bar graph showing a proportion of the most recent minimum light receiving quantity with respect to the peak value is displayed using a plurality of indication lights 100, each arranged on the front surfaces of a light projector 1 and a light receiver 2. The bar graph changes according to the update of the peak value and the fluctuation in the value of the minimum light receiving quantity of every hour.