Radar Device Height Estimation Using Road Surface Reflections
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Solution Overview
Problem
Existing techniques for estimating the positional deviation of a radar device in the height direction require detection results from another vehicle, limiting their applicability when only a single vehicle is involved.
Innovation Solution
An estimation device mounted to a mobile object that includes an acquisition unit to gather reflection point information, an extraction unit to identify road surface reflection points, and an estimation unit to calculate the device height based on road surface reflection point distances, allowing estimation without relying on external vehicle data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If detection results from another vehicle are used to estimate radar device height, then estimation can be performed, but the system loses independence and reliability when single vehicle operation is required
Solution Approach 1:
The system uses the own vehicle's radar device to detect road surface reflection points and estimate its own radar device height, eliminating the need for external vehicle data. The acquisition unit gathers reflection point information, the extraction unit identifies road surface reflections, and the estimation unit calculates height based solely on own vehicle sensor data, achieving self-service estimation.
2Measurement precision
If road surface reflection points are extracted from multiple reflection points, then estimation precision is improved, but the complexity of processing increases
Solution Approach 1:
The extraction unit selectively processes only the reflection points that satisfy specific criteria for road surface reflections, rather than processing all detected reflection points uniformly. This localized processing approach extracts only the relevant information needed for height estimation, improving precision while managing processing complexity through targeted analysis.
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
Enables accurate estimation of radar device height and deviation solely using the own vehicle's sensors, enhancing precision and independence from external inputs.
Implementation Method 1
an extraction unit to extract, among the plurality of reflection points, at least one road surface reflection point detected by reflection on a road surface
Data Source
AI summary
An estimation device mounted to a mobile object comprises an acquisition unit, an extraction unit, and an estimation unit. The acquisition unit acquires reflection point information for each of a plurality of reflection points detected by a radar device mounted to the mobile object. The extraction unit extracts, among the plurality of reflection points, at least one road surface reflection point detected by reflection on a road surface, based on at least the reflection point information. The estimation unit estimates a device height which is the height of the radar device mounted to the mobile object, based on at least a road surface reflection point distance which is the distance from the radar device to the road surface reflection point.