Object Detection Position Estimation Using Last Known Data
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Solution Overview
Problem
Existing object detecting apparatuses struggle to accurately estimate the position of objects outside the detection range of distance measuring sensors, particularly when the distance moved by a vehicle is not accurately obtained, leading to reduced calculation accuracy and potential vehicle collisions.
Innovation Solution
An object detecting apparatus that includes a position calculator, speed detector, displacement calculator, relative speed calculator, first determiner, and second estimator to estimate the object's position using last known data when direct calculation is impossible, ensuring accurate positioning even when the object is outside the detection range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the position of the object is estimated based on the distance moved by the vehicle calculated from wheel speed sensor, then the object position can be estimated when the object is outside the detection range, but the calculation accuracy is lowered when the distance moved is not accurately obtained
Solution Approach 1:
The system dynamically switches between two estimation methods based on detection conditions: using wheel speed sensor data when the object is within detection range, and using radar cross-section data when the object is outside detection range. This dynamic adaptation resolves the contradiction by selecting the appropriate data source for each situation.
Solution Approach 2:
The invention introduces radar cross-section data as an intermediary element to supplement the wheel speed sensor data. When the object is outside the detection range, the radar cross-section information serves as a mediator to maintain estimation accuracy without relying solely on potentially inaccurate distance calculations from wheel speed sensors.
2Reliability
If the object detection relies solely on distance measuring sensor detection range, then the detection system remains simple, but objects outside the detection range cannot be detected
Solution Approach 1:
The system achieves multi-functionality by using the same distance measuring sensor for both primary detection within range and, through data processing extensions, for estimating positions of objects outside the detection range. The dual use of wheel speed sensor and radar cross-section data further enhances this universality, allowing the system to detect both within-range and outside-range objects without adding separate dedicated sensors.
Solution Approach 2:
The system performs preliminary data collection and processing by continuously acquiring wheel speed sensor data and radar cross-section information while the object is within detection range. This preliminary action prepares the necessary data in advance, enabling accurate position estimation when the object moves outside the detection range without requiring additional hardware.
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 proper estimation of object positions, preventing collisions by using last known positions and relative speeds, even when direct calculation is impossible, thus enhancing safety and accuracy.
Implementation Method 1
it transmits probe waves, and it is possible to receive a reflected wave reflected by an object within the detection range
Data Source
AI summary
An object detecting apparatus that detects an object using a distance measuring sensor and is mounted in a moving body includes a position calculator that calculates a position of the object relative to the moving body, a speed detector that detects a speed of the moving body, a displacement calculator that calculates an distance moved by the moving body, a relative speed calculator that calculates a relative speed between the moving body and the object, a first determiner that determines whether a position calculation in the position calculator is possible, a second determiner that determines whether the moved distance calculation by the displacement calculator is possible, and an estimator that estimate the position of the object based on a last known position of the object, a last known distance moved by the moving body, or a last known relative speed.