Vehicle Sonar Positioning for Turn-Aware Collision Detection
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Solution Overview
Problem
Existing vehicle control systems face challenges in accurately determining collision points when the vehicle turns, leading to reduced accuracy in collision detection due to difficulties in measuring distances and specifying the object's position with existing range finder devices.
Innovation Solution
A vehicle control device that uses a sonar device to measure distances by transmitting and receiving sound waves, calculates an estimated straight line connecting the sonar device's positions before and after vehicle movement, and determines the object's position using intersection points of this line and circular-arc loci, enhancing collision determination accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If circular-arc loci intersection method is used to determine object position, then object position can be specified, but measurement accuracy deteriorates when vehicle turns
Solution Approach 1:
The system performs preliminary actions by calculating the estimated straight line connecting sonar device positions before and after vehicle movement, and determining which side of the line the object should be on based on movement direction, before final collision determination is made
Solution Approach 2:
The estimated straight line serves as an intermediary element that mediates between the sonar device positions and the object position determination. By introducing this reference line and the concept of 'correct side,' the system resolves the ambiguity in position specification that occurs when using circular-arc loci intersections during vehicle turns
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
The solution allows for high-accuracy detection of objects' positions even when the vehicle turns, improving collision determination by minimizing errors in distance measurements and accurately calculating intersection points.
Implementation Method 1
a range finder device (typically, a sonar device) installed in the vehicle to measure a distance to an object around the vehicle by transmitting and receiving sound waves
Data Source
AI summary
A vehicle control device controls a vehicle on the basis of a detection time representing a distance measured by a range finder device. The range finder device is installed in the vehicle to measure a distance to an object around the vehicle by transmitting and receiving sound waves. The vehicle control device includes a processor that receives an input of a first detection time after movement of the vehicle. The processor outputs an intersection point as coordinates indicating a position of the object when the intersection point is obtained. The intersection point is a point at which an estimated straight line and a first locus intersect. The estimated straight line connects respective positions of the range finder device before and after the movement of the vehicle. The first locus is based on the first detection time.