Object Detection Device Multi-Reception Coordinate Comparison
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Solution Overview
Problem
Conventional object detection devices reduce detection distance and increase incorrect detections when encountering low-height objects, as they narrow the detection range to avoid detecting low-height obstacles like curbs.
Innovation Solution
The object detection device employs multiple reception units and a determination unit to calculate coordinates based on reception times and compare distances, distinguishing between obstacles and non-obstacles by using a reference distance and adjusting the detection range to avoid low-height objects without reducing the overall detection range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the detection range is reduced by decreasing the gain of the reception of a reflected wave to avoid low-height objects, then incorrect detections of low-height objects are reduced, but the detection distance is shortened and detection capability is degraded
Solution Approach 1:
The patent transitions from single-reception-unit detection to multi-reception-unit detection, adding spatial dimensionality to the detection system. By arranging multiple reception units at different positions and combining their detection results, the system can distinguish between low-height objects (curbs) and obstacles requiring avoidance, thereby maintaining detection distance while improving detection accuracy through multi-dimensional information fusion
2Reliability
If the transmission direction is set to horizontal direction to avoid detecting low-height objects, then low-height objects are excluded from detection range, but detection capability for legitimate obstacles is reduced
Solution Approach 1:
The patent makes the detection system universal by enabling it to detect multiple types of objects (both low-height curbs and obstacles requiring avoidance) using the same horizontal transmission direction. The multi-reception-unit configuration allows the system to process detection signals differently based on object type, achieving multi-functionality without sacrificing detection coverage
3Measurement precision
If multiple reception units are used to calculate coordinates and compare distances for distinguishing obstacles, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the detection function across multiple reception units, with each unit independently receiving reflected waves and providing detection signals. This segmentation allows the system to calculate multiple coordinates and compare distances for accurate object classification, achieving high measurement precision through distributed functional segmentation
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 reduces incorrect detections of low-height objects while maintaining the detection range, effectively determining when to avoid obstacles and when to drive over them, such as curbs, and reduces detection omissions for larger obstacles like walls.
Implementation Method 1
a first reception unit for receiving a reflected wave resulting from reflection of the transmission wave transmitted from the transmission unit by an object within the detection range
Data Source
AI summary
An object detection device of the present disclosure includes three reception units for receiving reflected waves resulting from reflection of a transmission wave by an object within a detection range, and a determination unit for determining presence or absence of an object to be avoided based on outputs of the three reception units. The determination unit calculates first coordinates and second coordinates at which an object is estimated to be present, based on reception times from when a transmission wave is transmitted until reflected waves are received by the three reception units, and determines whether or not the object needs to be avoided, based on a distance between the first coordinates and the second coordinates.