Optical Detection Apparatus for Dynamic Particle Composition Differentiation
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Solution Overview
Problem
Existing methods for detecting particle compositions in a vehicle's monitoring region, such as LiDAR systems, struggle to differentiate between dynamic and uniform particle behaviors, particularly in distinguishing between precipitation and spray, which affects driving safety due to unclear road conditions.
Innovation Solution
The method involves performing at least two measurements with a temporal distance to ascertain particle target density differences, concluding dynamic behavior if changes exceed a tolerance, allowing differentiation between temporally dynamic compositions like spray and uniform compositions like precipitation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical transmission signals are transmitted into the monitoring region and particle reflection signals are received, then particle compositions in the monitoring region can be detected, but the ability to differentiate between dynamic and uniform particle behaviors is insufficient
Solution Approach 1:
The patent implements periodic measurements by performing at least two measurements with a temporal distance and evaluating the temporal development of particle target density. This periodic sampling allows differentiation between dynamic and uniform particle behaviors by comparing density changes over time, thereby resolving the contradiction between detection capability and information preservation.
2Reliability
If particle target density is ascertained from particle reflection signals, then particle composition information can be obtained, but the complexity of the detection apparatus and measurement process increases
Solution Approach 1:
The patent introduces dynamic evaluation by performing multiple measurements at different time points and analyzing the temporal development of particle target density. This dynamic approach improves reliability in distinguishing between spray and precipitation by observing density changes over time, rather than relying on a single static measurement.
Solution Approach 2:
The patent changes the measurement parameter from a single particle target density value to the temporal development of particle target density. By evaluating how the density parameter changes over time between multiple measurements, the system can reliably differentiate between dynamic particle compositions (spray) and uniform particle compositions (precipitation) without significantly increasing device complexity.
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 effectively distinguishes between dynamic and uniform particle behaviors, improving the identification of road conditions, thereby enhancing driving safety by accurately differentiating between spray and precipitation, reducing the risk of misinterpretation.
Implementation Method 1
optical transmission signals are transmitted into the monitoring region
Implementation Method 2
transmission signals that are reflected at particle targets of any particle compositions present in the monitoring region are received as particle reflection signals
Data Source
AI summary
A method for capturing at least particle compositions (21) in a monitoring region (14) that exhibit a temporally dynamic behaviour with an optical detection apparatus (12), and an optical detection apparatus (12) are described. In the method, during at least one measurement, optical transmission signals (22) are transmitted into the monitoring region (14) and transmission signals (22) that are reflected at particle targets (28) of any particle compositions (21) present in the monitoring region (14) are received as particle reflection signals (30). The presence of dynamic particle compositions (21) is concluded from the particle reflection signals (30). At least two measurements are performed with a temporal distance. A particle target density or a variable characterizing the particle target density is ascertained for at least one partial volume (48) of the monitoring region (14) from the particle reflection signals (30) of each measurement. If the particle target density (52) or the variable characterizing it from the at least two measurements should differ by more than a prescribable or prescribed tolerance, it is concluded that the particle reflection signals (30) from the at least one partial volume are caused by the reflection of the transmission signals (22) at dynamic particle compositions (21).