Vehicle Door Control Using Segmented Sonar Detection
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Solution Overview
Problem
Conventional vehicle door opening/closing devices are difficult to use due to complex detection patterns and have trouble accurately detecting user movement with wide detection ranges, leading to inaccurate operation.
Innovation Solution
A vehicle door opening/closing device with a simple configuration using two detection means and a control system that identifies object movement by setting a predetermined operation range within the vehicle width direction, allowing accurate detection and smooth door control using existing back sonar sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a wide detection range is used for the back sonar, then the detection coverage is improved, but the accuracy of detecting user movement is deteriorated
Solution Approach 1:
The detection space is segmented into multiple regions: a first detection range with a first detection means and a second detection range with a second detection means. By dividing the detection space, the system achieves both wide coverage and precise movement detection within specific zones.
Solution Approach 2:
The patent introduces a vehicle width direction dimension to the detection system by setting an operation range that spans across the vehicle width. This dimensional addition allows the system to accurately identify user movement by detecting position changes across multiple spatial dimensions, resolving the contradiction between wide detection range and movement detection accuracy.
2Reliability
If a complex detection pattern with multiple predetermined conditions is implemented, then the door opening/closing control accuracy is improved, but the ease of operation is deteriorated
Solution Approach 1:
The detection pattern is segmented into distinct detection ranges and regions (first detection range, second detection range, start area, trigger area). This segmentation simplifies the control logic by associating specific door operations with specific regions, making the system easier to operate while maintaining accuracy.
Solution Approach 2:
The system performs preliminary detection by identifying whether an object is within the operation range and determining its position in advance. This preliminary action simplifies subsequent control decisions by pre-establishing the detection context, reducing the complexity of real-time control operations.
3Measurement precision
If multiple detection means are used to improve detection accuracy, then the measurement precision is improved, but the device complexity is increased
Solution Approach 1:
Each detection means is designed to perform multiple functions: detecting both the presence of an object and its position within specific regions. This multi-functionality reduces the need for additional specialized sensors, achieving high detection accuracy without proportionally increasing device complexity.
Solution Approach 2:
The system uses the vehicle width direction as an additional dimension to simplify detection logic. By defining an operation range that spans the vehicle width and detecting object positions within this dimensional framework, the system achieves accurate movement detection with a relatively simple configuration of detection means.
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 accurate identification of user movement and automatic door operation despite a simple configuration, limiting detection range to improve accuracy and reduce complexity.
Implementation Method 1
A vehicle door opening/closing device includes: a drive means that opens/closes a door of a vehicle; a first detection means and a second detection means that detect a distance to an object to be detected
Data Source
AI summary
A vehicle door opening/closing device including a drive mechanism for driving the opening/closing of a door of a vehicle; a first detector and second detector for detecting the distance to an item to be detected which is positioned in a first detection range outside the vehicle or a second detection range which is closer than the first detection range; and a controller for controlling the drive mechanism, based on the detection results of the detectors. The controller prepares for the opening/closing of the door by the drive mechanism, by having the first and second detectors detect that an item to be detected has moved from the start area which is an area that overlaps the first detection range, to a trigger area which is an area that overlaps the second detection range, in the range of operation at a predetermined interval in the width direction of the vehicle.