LiDAR Resolution Enhancement via Inter-Frame Beam Shifting
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Solution Overview
Problem
Conventional distance measuring devices require a large number of light-receiving elements to achieve improved resolution, which is inefficient.
Innovation Solution
A distance measuring device that emits pulsed irradiation light and shifts the irradiation direction within a range smaller than the resolution between frames, using a light source and scanning unit to control the light emission and scanning, while the light-receiving unit with a pixel array receives incident light, allowing for improved resolution with fewer light-receiving elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the positions of pixels in the pixel array unit are shifted two-dimensionally in the row direction and column direction each time scanning is performed, then the resolution is improved, but the number of light-receiving elements required increases
Solution Approach 1:
The patent applies dynamics by making the irradiation direction adjustable and variable between frames. The control unit shifts the irradiation direction dynamically within a range smaller than the resolution between frames, allowing the same physical pixel array to effectively sample different spatial positions over time, thereby achieving super-resolution without adding more pixels
Solution Approach 2:
The patent employs periodic action by performing repeated scanning operations with incremental shifts in irradiation direction between frames. Each frame captures data at slightly different angular positions, and through multiple such periodic scanning cycles, the system accumulates sufficient spatial samples to reconstruct high-resolution distance information
Solution Approach 3:
The patent changes the parameter of irradiation direction systematically between frames. By controlling the light source or scanning unit to shift the irradiation direction within a range smaller than the resolution between frames, the system varies the angular parameter to achieve finer spatial sampling without requiring additional light-receiving elements
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 enhances the resolution of the distance measuring device while reducing the number of light-receiving elements, resulting in a more efficient and cost-effective solution.
Implementation Method 1
a light source that emits pulsed irradiation light; a light-receiving unit that receives incident light including reflected light with respect to the irradiation light
Implementation Method 2
a distance measuring unit that performs distance measurement based on the incident light
Data Source
AI summary
The present technology relates to a distance measuring device and a distance measuring method capable of improving the resolution of the distance measuring device while suppressing the number of light-receiving elements.The distance measuring device includes a light source that emits pulsed irradiation light; a scanning unit that scans the irradiation light in a first direction; a light-receiving unit that receives incident light including reflected light with respect to the irradiation light; a distance measuring unit that performs distance measurement based on the incident light; and a control unit that shifts an irradiation direction of the irradiation light in the first direction within a range smaller than a resolution in the first direction between frames by controlling at least one of the light source and the scanning unit. The present technology can be applied to LiDAR, for example.