LiDAR Distance Measurement With Two-Stage Focus Scanning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing LiDAR measuring apparatuses require complex configurations for low and high precision distance measurements, leading to reduced accuracy and increased complexity.
Innovation Solution
A measuring apparatus using a common configuration for focus position determination and distance measurement, incorporating a light source, focus adjuster, scanner, and photodetector, with a processing circuit that controls these components to perform first and second scan operations for accurate distance information generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a complex configuration is used for both low and high precision distance measurements, then measurement coverage is improved, but device complexity increases
Solution Approach 1:
The patent applies a single unified configuration that performs both low precision and high precision distance measurements. The processing circuit executes different scan operations (first scan for low precision, second scan for high precision) using the same hardware components, eliminating the need for separate configurations and reducing overall device complexity while maintaining measurement coverage.
2Measurement precision
If separate configurations are used for low and high precision measurements, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic scan operations where the processing circuit adaptively selects between first scan operations (for low precision requirements) and second scan operations (for high precision requirements). This dynamic approach allows the system to adjust measurement precision based on actual needs without maintaining separate static configurations, thereby reducing device complexity while preserving measurement precision capabilities.
3Measurement precision
If multiple scan operations are performed, then measurement accuracy is improved, but measurement time increases
Solution Approach 1:
The patent applies partial action by performing only the necessary scan operations. The processing circuit first attempts a first scan operation and only performs the additional second scan operation if high precision is required. This selective approach avoids unnecessary measurement time consumption while ensuring accurate distance information is obtained when needed, balancing measurement precision with time efficiency.
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
Accurately generates distance information of irradiation points on an object using a simple configuration, enhancing measurement precision while reducing complexity.
Implementation Method 1
a light source that emits irradiation light for irradiating an object; a photodetector that detects reflected light from the object
Implementation Method 2
an adjuster that adjusts a focus position of the irradiation light
Data Source
AI summary
A measuring apparatus includes a light source that emits irradiation light for irradiating an object; an adjuster; a scanner; a photodetector; and a processing circuit. The processing circuit performs a first scan operation by causing the scanner to change an irradiation angle, and causing the light source to emit the irradiation light, generates optical detection information through the first scan operation based on reflected light detected by the photodetector, causes the adjuster to set the focus position of a second scan operation based on the optical detection information through the first scan operation, performs the second scan operation by causing the scanner to change the irradiation angle, and causing the light source to emit the irradiation light, generates optical detection information through the second scan operation based on the reflected light detected by the photodetector, and generates distance information of the object based on the optical detection information.