LiDAR Ranging Device with Adjustable Beam Diameter
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Solution Overview
Problem
Current LiDAR technologies face challenges in achieving high spatial resolution for detecting fine details such as scratches, cracks, and rugged shapes on surfaces, which limits their effectiveness in precise measurements.
Innovation Solution
A ranging device that adjusts the beam diameter of laser light based on distance, using a beam diameter adjustment mechanism to ensure a smaller beam diameter at the incidence position, thereby improving spatial resolution during LiDAR measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed beam diameter is used for laser light emission, then the device structure is simple, but the spatial resolution deteriorates at distant positions
Solution Approach 1:
The patent applies dynamics by making the beam diameter adjustable rather than fixed. The beam diameter adjustment mechanism dynamically changes the beam diameter based on the distance to the measurement target, allowing the system to adapt to different ranging distances and maintain high spatial resolution at both close and far positions.
Solution Approach 2:
The patent changes the physical parameter of beam diameter according to the measurement distance. By adjusting the beam diameter parameter - using smaller diameters for distant targets and larger diameters for close targets - the system optimizes spatial resolution across different ranging scenarios.
2Measurement precision
If a small beam diameter is used at the incidence position, then spatial resolution is improved, but the light intensity decreases
Solution Approach 1:
The system dynamically adjusts both beam diameter and light intensity based on measurement distance. For distant targets, it uses small beam diameters with high light intensity to maintain resolution and signal strength. For close targets, it uses larger beam diameters with lower intensity, optimizing the balance between resolution and energy usage.
Solution Approach 2:
The patent simultaneously changes two parameters - beam diameter and light intensity - in coordination with each other. By linking these parameter changes to the measurement distance, the system achieves high spatial resolution while maintaining adequate light intensity for detection.
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
The solution enhances spatial resolution, allowing for more accurate detection of surface details even at distant positions, preventing a decline in measurement resolution and enabling better recognition of object states.
Implementation Method 1
measuring a distance between a light-emitting means and an incidence position of an object, based on reflected light of laser light being incident with a first beam diameter on the incidence position from the light-emitting means
Implementation Method 2
a beam diameter adjustment means for adjusting a beam diameter of laser light being incident on the incidence position to a second beam diameter according to the distance
Data Source
AI summary
To improve spatial resolution during measurement via LiDAR or the like, a ranging device comprises: at least one memory storing instructions; and at least one processor executing the instructions to measure the distance between a light-emitting device and an object on the basis of reflected light of a laser beam that is incident on a first beam diameter at a incidence position, adjust the beam diameter, of the laser beam on the incidence position, to a second beam diameter in accordance with the abovementioned distance, and generate sensing data pertaining to the object on the basis of reflected light corresponding to a laser beam that is incident on a second beam diameter at the incidence position. The at least one processor adjusts the beam diameter of the laser beam such that the second beam diameter at the incidence position is smaller than the first beam diameter.