Vehicle Object Position Warning Using Direct and Indirect Waves
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Solution Overview
Problem
Existing vehicle detection systems using direct wave triangulation struggle to accurately determine the specific position of objects, leading to potential inaccuracies in warning systems due to limited detectable ranges and difficulty in specifying object locations.
Innovation Solution
A driving assistance device employing multiple detection sensors with different positional relationships to transmit and receive probe waves, utilizing both direct and indirect waves for triangulation, and dividing the vehicle's surroundings into areas to confirm object presence, thereby enhancing positional accuracy and preventing false warnings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If triangulation is used to detect object position using direct and indirect waves, then the detectable range is limited but specific position can be specified, but if only direct wave detection is used, then the detectable range is wide but specific position cannot be specified
Solution Approach 1:
The patent merges direct wave detection and indirect wave detection results to determine object position. When both detection methods detect an object in the same area, the system confidently specifies the position. This combination allows the system to maintain wide detectable range while achieving accurate position specification through cross-validation of detection results.
Solution Approach 2:
The patent divides the detection area into multiple regions and processes direct wave and indirect wave detection results separately for each region. By segmenting the detection space and comparing results region-by-region, the system can accurately determine object positions while maintaining comprehensive coverage of the detectable range.
2Area of stationary object
If object detection is performed only by direct wave, then the detectable range is wide, but it is difficult to specify a specific position of the object
Solution Approach 1:
The patent uses indirect wave detection as an intermediary to bridge the gap between wide detectable range and accurate position specification. The indirect wave detection acts as a mediator that provides additional spatial information, enabling the system to specify object positions accurately while maintaining the wide coverage advantage of direct wave detection.
Solution Approach 2:
The patent adds the dimension of indirect wave detection to the direct wave detection system. By incorporating detection from multiple dimensional perspectives (direct and indirect paths), the system achieves both wide detectable range and precise position specification that cannot be obtained from a single detection dimension.
3Measurement precision
If triangulation is used for object detection, then specific position can be specified, but the detectable range is limited because triangulation must be established
Solution Approach 1:
The patent applies partial triangulation by using only the necessary combination of direct and indirect wave detections required for position specification, rather than requiring complete triangulation from all sensors. This partial approach reduces system complexity while maintaining the ability to specify object positions accurately in detectable areas.
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 specifies the position of objects using triangulation and direct waves, reducing false warnings by confirming object presence in specific areas, thus improving safety and reliability of vehicle assistance systems.
Implementation Method 1
a first object position specifying unit configured to specify a position of the object by triangulation using a first detection distance calculated by a detection sensor serving as a transmission source receiving the reflected wave of the probe wave as a direct wave and a second detection distance calculated by another detection sensor different from the detection sensor serving as the transmission source receiving the reflected wave of the probe wave as an indirect wave
Implementation Method 2
measures a time until the output probe wave is reflected by the object and returns, and detects a distance to the object
Implementation Method 3
measures a time until the output probe wave is reflected by the object and returns, and detects a distance to the object
Data Source
AI summary
A driving assistance device including a plurality of detection sensors configured to detect objects and a warning image display unit configured to display, in the surrounding image, a warning image indicating that the object is located in an area in which the object is determined to be located by the object determination unit. When the position of the object is specified in any of a plurality of areas by the first object position specifying unit, the warning image display unit does not display the warning image based on a specification result of a second object position specifying unit under a predetermined condition for an area different from an area in which the object is specified to be located by the first object position specifying unit even when the object is specified to be located only by the second object position specifying unit.