Electronic Level Barcode Pattern Grayscale Inversion Range
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Solution Overview
Problem
Existing electronic levels face challenges in expanding their measurable range due to interdependencies between barcode mark dimensions, focal point distance, view angle, and pixel size, making it difficult to perform accurate measurements at longer or shorter distances without requiring new pattern rules and arithmetic processing.
Innovation Solution
The electronic level employs a leveling rod with a first pattern for short-distance measurements and a second pattern, which is either enlarged or reduced with inverted grayscale, allowing the electronic level to switch between patterns to expand its measurement range without hardware changes, using grayscale inversion and correction mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single barcode pattern is used on the leveling rod, then the electronic level can perform measurements within a fixed distance range, but the measurable range is limited and cannot be expanded to different distances
Solution Approach 1:
The leveling rod is divided into multiple sections, each containing a different barcode pattern (first pattern for short distances, second pattern for long distances). The electronic level reads the appropriate pattern based on the measured distance, enabling multi-range measurement capability without requiring a single complex pattern to work at all distances.
Solution Approach 2:
The second barcode pattern is created by inverting the grayscale of an enlarged version of the first pattern. This inversion technique allows the electronic level to distinguish between different distance ranges by recognizing the inverted pattern characteristics, while maintaining a systematic relationship between the patterns that simplifies the overall system design.
2Adaptability or versatility
If the barcode pattern is enlarged to improve visibility at longer distances, then the measurement range can be extended, but the pattern size and dimensions change requiring new calibration
Solution Approach 1:
The system changes the scale parameter of the barcode pattern based on the measurement distance. The second pattern uses an enlarged scale compared to the first pattern, allowing better visibility and measurement accuracy at longer distances. The electronic level automatically adjusts its interpretation of the pattern based on the detected pattern type, maintaining precision across different distance ranges.
3Adaptability or versatility
If the grayscale is inverted to create the second pattern, then the pattern can be distinguished at different distances, but the electronic level requires additional processing to correct the inverted values
Solution Approach 1:
The electronic level performs preliminary detection to identify which barcode pattern is present before proceeding with measurement. Once the inverted second pattern is detected, the system proactively applies grayscale inversion correction to convert the readings into the proper scale, preventing incorrect measurements from being recorded.
Data Source
AI summary
A leveling rod for electronic level for easily expanding a measurable range for long/short distance measurements without inaccuracy even when mixed and used with a conventional level, has a first pattern having a grayscale of predetermined rules for a first distance range measurement, and a second pattern enlarged/reduced with respect to a pattern with the inverted grayscale of the first pattern for a second distance range measurement different from the first distance range. An electronic level includes a height measuring device measuring a collimation point height from an output signal from a line sensor for correspondence to the first pattern, a grayscale inverting device inverting the grayscale of the output signal from the line sensor for correspondence to the second pattern, and a height correcting device correcting the height measured by the height measuring device according to a reduction scale of the second pattern with respect to the first pattern.