Optical Sensor Region of Interest Shifting for High Frame Rate Sensing
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Solution Overview
Problem
Existing control technologies for optical sensors face challenges in achieving high sensing accuracy due to increased scanning time and reduced frame rate, which affects the resolution and reliability of the sensing data.
Innovation Solution
The technique involves shifting the region of interest between two successive scanning frames by N−1 or fewer rows of light receiving elements, and integrating light receiving data from current and previous N−1 scanning frames to output sensing data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If light receiving data is combined from overlapping addition regions in each scanning region, then measurement precision is improved, but scanning time increases and frame rate decreases
Solution Approach 1:
The light receiving elements are divided into multiple regions of interest (ROIs), each corresponding to a specific scanning region. By segmenting the sensor into distinct ROIs and assigning them to different scanning regions, the system can process data from multiple regions simultaneously through parallel scanning, thereby improving frame rate while maintaining measurement precision through the combination of data from multiple addition regions within each ROI.
2Productivity
If scanning time is reduced to increase frame rate, then productivity is improved, but measurement precision deteriorates
Solution Approach 1:
Multiple addition regions are pre-configured within each region of interest before scanning begins. The control device is pre-programmed to combine light receiving data from these overlapping addition regions automatically during data processing. This preliminary setup allows the system to perform rapid parallel scanning with reduced scanning time per frame while ensuring that measurement precision is maintained through the pre-arranged data combination mechanism from multiple addition regions.
3Speed
If the region of interest is shifted by more than N−1 rows between successive scanning frames, then scanning speed increases, but data integration accuracy decreases
Solution Approach 1:
The region of interest is dynamically shifted by a controlled amount (N-1 or fewer rows) between successive scanning frames. This dynamic shifting strategy allows the scanning line to move efficiently through the sensor array at high speed while maintaining optimal overlap between consecutive frames. The controlled shift amount ensures that data from multiple frames can be accurately integrated and combined from corresponding addition regions, preserving measurement precision while achieving high scanning speed.
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
This approach reduces scanning time per frame, enhances resolution by increasing the resolution of output sensing data, and improves sensing accuracy by achieving a higher frame rate and resolution.
Implementation Method 1
an optical sensor 10 that receives reflected light in response to light irradiation
Data Source
AI summary
Disclosed is a technique for controlling an optical sensor that receives reflected light in response to light irradiation along each scanning line which moves in a scanning direction within a scanning frame. In the technique, a region of interest is shifted between two successive scanning frames. The region of interest is a region from which light receiving data is read for each scanning line, and corresponds to N rows of light receiving elements stacked in the scanning direction in the optical sensor, where N is an integer greater than or equal to 2. The region of interest for each scanning line is shifted by N−1 or fewer rows of light receiving elements between two successive scanning frames. Sensing data is outputted by integrating the light receiving data of each scanning line retrieved from current and previous N−1 scanning frames.