Ultrasonic Object Detection via Dual Transceiver Intersection
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Solution Overview
Problem
Existing object detection technologies using ultrasonic waves for distance measurement lack accuracy in determining the position and shape of objects, particularly in complex scenarios where multiple reflections and angles are involved.
Innovation Solution
The implementation of a dual transmission/reception unit system, where two units are spaced apart and alternately transmit and receive ultrasonic waves to calculate multiple intersection points, allowing for more precise determination of object positions and shapes by considering line segments and arcs, thereby improving accuracy in collision avoidance systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single transmission/reception unit is used for object detection, then the device complexity is low, but the measurement precision of object position is insufficient
Solution Approach 1:
The system divides the detection task by using multiple transmission/reception units (first and second units) spaced at different positions. Each unit independently transmits and receives exploration waves, and the processing unit combines results from multiple units to calculate precise object positions through intersection of loci, thereby improving measurement precision through spatial segmentation of the detection system.
2Measurement precision
If multiple transmission/reception units are used to improve detection accuracy, then the measurement precision increases, but the device complexity increases
Solution Approach 1:
The system merges the functions of multiple transmission/reception units into a unified detection framework. The processing unit combines exploration waves received from both the first and second transmission/reception units, integrating their respective loci calculations to determine object positions and shapes. This merging approach allows the system to achieve high measurement precision while managing complexity through coordinated operation of multiple units.
3Reliability
If exploration waves are transmitted from multiple positions, then the reliability of object detection improves, but the use of energy increases
Solution Approach 1:
The first and second transmission/reception units alternately transmit exploration waves in periodic intervals rather than continuously. This periodic transmission pattern from multiple positions enables reliable object detection through diversified data collection while reducing overall energy consumption compared to continuous transmission from all units.
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 enhances the accuracy of object detection and collision avoidance by providing real-time, precise positioning and shape determination of objects, even in complex scenarios, thereby effectively preventing collisions with vehicle doors.
Implementation Method 1
a first transmission/reception unit configured to transmit and receive an exploration wave to detect a peripheral object
Implementation Method 2
measuring a distance to an object by transmitting exploration waves such as ultrasonic waves to the object and receiving the exploration waves reflected by the object
Data Source
AI summary
An object detection device includes: first and second transmission/reception units transmitting and receiving an exploration wave to detect a peripheral object; and a processing unit determining a position of an object based on reception results of the first and second transmission/reception units. The processing unit calculates a first point based on first and second exploration waves, calculates a second point based on third and fourth exploration waves, determines that the object exists on a line segment interconnecting the first and second points when a distance between the first and second points is less than a predetermined value, and determines that the object exists on the line segment and line segments extended from both ends of the line segment when the distance between the first and second points is equal to or greater than the predetermined value.