Dual-Antenna Kick Sensor for Accurate Vehicle Door Activation
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Solution Overview
Problem
Existing door opening-closing devices in vehicles are susceptible to erroneous operation due to detection of non-intentional objects, such as animals or legs of individuals, leading to unwanted door activation.
Innovation Solution
A kick sensor system utilizing dual antennas, one receiving radio waves from the lateral side and another from the lower side of the vehicle door, to detect a person's leg motion as a trigger for door control, minimizing erroneous activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a detection sensor is used to detect objects within a detection range near the vehicle door, then the door can be automatically opened when a user is detected, but the door may be erroneously opened when non-intentional objects such as animals or legs are detected
Solution Approach 1:
The detection space is divided into multiple regions using two antennas: a first antenna for receiving radio waves from a lateral region and a second antenna for receiving radio waves from a lower region. By segmenting the detection zones, the system can distinguish between intentional kick gestures (affecting both regions) and accidental detections (affecting only one region), thereby reducing erroneous activations while maintaining automatic door opening functionality.
2Device complexity
If a single antenna is used to detect leg motion, then the device complexity is reduced, but the precision of detecting intentional leg motion versus accidental detection is insufficient
Solution Approach 1:
The system transitions from a single-detection-point approach to a multi-dimensional detection approach by deploying two antennas at different spatial positions and orientations. The first antenna detects radio waves from the lateral side while the second antenna detects from the lower side, creating a three-dimensional detection volume. This dimensional expansion enables more precise differentiation between intentional kick gestures and accidental detections through spatial analysis.
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 system accurately detects intentional leg motions for door control, reducing false activations and enhancing reliability.
Implementation Method 1
The kick sensor includes a first antenna that receives a radio wave from at least a lateral side of the door of the vehicle
Implementation Method 2
The kick sensor includes a second antenna that receives a radio wave from at least a lower side of the door of the vehicle
Data Source
AI summary
A kick sensor is provided in a vehicle. and detects a motion of a leg of a person that triggers control of a door of the vehicle. The kick sensor includes first and second antennas. The first antenna receives a radio wave from at least a lateral side of the door of the vehicle. The second antenna receives a radio wave from at least a lower side of the door of the vehicle.