Vehicle Door Sensor Dynamic Detection Mode Switching
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Solution Overview
Problem
Existing operation detecting devices for vehicle opening and closing bodies, such as sliding doors and back doors, face challenges in performing emergency stops quickly while the opening and closing body is in motion, due to complex operation procedures and prolonged operation times.
Innovation Solution
An electrostatic capacitance sensor system with a mutual capacitance type configuration, including transmission and reception electrodes, and a control section that outputs control signals to manage the opening and closing body's motion based on user input, allowing for quick operation detection and control, including idle or motion states, to facilitate rapid emergency stops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a motion detection pattern matching system is used to detect user operations, then detection accuracy is improved, but operation time increases and emergency response becomes too slow
Solution Approach 1:
The patent applies dynamics by switching detection modes based on the opening/closing body's motion state. When the body is stationary, the system uses comprehensive motion pattern matching for accurate detection. When the body is in motion, the system switches to simple contact detection for rapid response. This dynamic adaptation resolves the contradiction between detection accuracy and response time.
Solution Approach 2:
The patent changes the detection parameter from complex motion pattern matching to simple contact detection based on the motion state of the opening/closing body. This parameter change allows the system to maintain high detection accuracy when stationary while achieving rapid response when motion occurs, thereby resolving the time-accuracy tradeoff.
2Speed
If simple contact detection is used, then operation response time is reduced, but detection accuracy and reliability decrease
Solution Approach 1:
The system dynamically adjusts detection sensitivity and method based on motion state. During motion, simple contact detection provides rapid response. When stationary, the system transitions to comprehensive motion pattern matching for high accuracy detection. This dynamic adjustment resolves the contradiction between speed and precision.
Solution Approach 2:
The system uses feedback from the motion state detection to adjust the detection method. When the opening/closing body is detected to be in motion, the system activates rapid contact detection mode. When stationary, it switches to accurate pattern matching mode. This feedback mechanism ensures both rapid response and high accuracy are achieved at appropriate times.
3Reliability
If motion pattern matching is required for all operations, then false operations are reduced, but operation complexity increases and emergency stop becomes difficult
Solution Approach 1:
The patent segments the detection requirements based on motion state. During motion, only simple contact detection is required for emergency stops. When stationary, comprehensive motion pattern matching is applied to prevent false operations. This segmentation allows both high reliability and ease of operation to be achieved in different contexts.
Solution Approach 2:
The system dynamically adjusts operational requirements based on motion state. When the opening/closing body is in motion, the system accepts simple contact operations for rapid emergency response. When stationary, it requires comprehensive motion pattern matching to ensure reliability and prevent false operations. This dynamic adjustment resolves the contradiction between reliability and ease of operation.
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 the vehicle opening and closing body to be operated in a short time, even when in motion, reducing the risk of collisions or objects being caught, by allowing for immediate emergency stops and minimizing erroneous detections.
Implementation Method 1
an electrostatic capacitance sensor which detects the position or the motion of a detection object based on a change of an electrostatic capacitance... a capacitance value of the electrostatic capacitance generated between the electrodes or between the electrode and a ground is changed
Data Source
Figure 1A
Figure 1B~2A
Figure 2B~2C
AI summary
An operation detecting device (100) of an opening and closing body for a vehicle, includes: a detecting section (110) that detects an operation by a user with respect to an opening and closing body (150) of a vehicle (900); an input section (127) that receives an opening and closing body motion signal which indicates whether or not the opening and closing body is in motion or idle; a determination section (123) that determines whether or not the operation is performed using different detection conditions for a case in which the opening and closing body is in motion and a case in which the opening and closing body is idle; and an output section (127) that outputs a control signal which causes the opening and closing body to move or stop based on the determination result of the determination section.