Drive Assist Device Lens Alignment for Detection Range
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Solution Overview
Problem
Current drive assist devices for vehicles face challenges in increasing detectable distance while maintaining a compact size and avoiding interference with human vision, as increasing laser intensity or light receiving lens area can have adverse effects.
Innovation Solution
A drive assist device with a light source, a first lens for irradiated light, a second lens for reflected light, and a light receiving element, where the lens areas are aligned in the vehicle width direction to enhance detection range without increasing the device's overall size, and a vehicle controller to process detection information for safe vehicle operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the area of the light receiving lens is increased to increase detectable distance, then the detection range is improved, but the overall size of the drive assist device increases
Solution Approach 1:
The patent applies dimensionality change by arranging the first lens area and second lens area in different spatial dimensions (aligned in vehicle width direction rather than overlapping in the same plane). This allows the optical paths to be separated efficiently, improving detection range without requiring a proportional increase in the overall device footprint.
2Measurement precision
If the intensity of laser light is increased to increase detectable distance, then the detection range is improved, but it may affect the human eye
Solution Approach 1:
The patent changes the spatial arrangement parameter of the lens areas rather than increasing laser intensity. By optimizing the geometric configuration (aligning lens areas in vehicle width direction), the system achieves improved detection range through better optical path separation without modifying the laser intensity parameter, thus avoiding human eye safety issues.
3Measurement precision
If the light receiving lens area is increased to improve detection capability, then the detection precision is improved, but it becomes harder for the driver to have a wide visual field
Solution Approach 1:
The patent resolves the conflict between detection precision and driver visual field by utilizing spatial dimensionality change. The first and second lens areas are arranged in different positions along the vehicle width direction, allowing the optical system to achieve superior detection precision while maintaining a compact overall form factor that does not obstruct the driver's view.
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 configuration allows for improved detection range and accuracy while maintaining a compact device size, enhancing safety by enabling quicker detection of targets and reducing operational errors, while adhering to safety standards for laser intensity.
Implementation Method 1
a first lens having a first area through which the irradiated light from the light source passes
Implementation Method 2
a second lens having a second area through which reflected light reflected from the detection target passes
Implementation Method 3
a light receiving element that receives the reflected light that passes the second lens
Data Source
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AI summary
A drive assist device (100) includes a light source (6) that irradiates a detection target with light, a first lens (1) having a first area (F1) through which the irradiated light from the light source (6) passes, a second lens (2) having a second area (F2) through which reflected light reflected from the detection target passes, and a light receiving element (8) that receives the reflected light that passes the second lens (2). The first area (F1) and the second area (F2) are arranged to be in align with each other, in width direction of the drive assist device (100).