Ultrasonic Sensor in Door Handle for Vehicle Locking
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Solution Overview
Problem
The increasing number of driver assistance systems in vehicles leads to a higher demand for sensors, which complicates installation due to limited space and increases costs, as each system requires multiple sensors for various functions.
Innovation Solution
A locking system that incorporates an ultrasonic sensor in the door handle, which serves dual purposes by determining the resonant frequency to unlock or lock the vehicle and also functions as an environmental sensor, reducing the need for multiple sensors by using the same device for both tasks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensors are installed for different driver assistance systems, then the functionality and measurement precision are improved, but the device complexity and installation difficulty increase due to limited space
Solution Approach 1:
The ultrasonic sensor in the door handle is designed to perform multiple functions: it detects locking requests by measuring resonance frequency changes when touched, and simultaneously serves as an environment sensor for driver assistance systems by detecting objects in the vicinity. This multi-functionality reduces the total number of sensors required in the vehicle while maintaining detection accuracy for both locking control and environmental awareness
2Adaptability or versatility
If multiple sensors are installed for different driver assistance systems, then the functionality is improved, but the installation space requirements and costs increase
Solution Approach 1:
The ultrasonic sensor integrated into the door handle serves dual purposes: it acts as a contactless locking trigger by detecting resonance frequency changes when approached or touched, and simultaneously functions as an environment sensor for driver assistance systems. This eliminates the need for separate sensors for locking control and environmental detection, significantly reducing installation space requirements while enhancing overall system functionality
Solution Approach 2:
The patent combines the locking request detection function and the environment sensing function into a single ultrasonic sensor located in the door handle. By merging these two previously separate functions into one sensor component, the system reduces the total sensor count and installation space while maintaining both locking control capability and environmental awareness for driver assistance systems
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 ultrasonic sensor effectively handles locking requests and provides environmental data, thereby reducing the number of sensors required and simplifying installation while maintaining functionality.
Implementation Method 1
A locking system that incorporates an ultrasonic sensor in the door handle, which serves dual purposes by determining the resonant frequency to unlock or lock the vehicle
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The locking system has a control unit, so that the control unit is unlocked based on the detection of the existence of a vehicle key and the actuation of a door handle (1) by a person which drives the vehicle key with identification transmitter. An ultrasonic sensor (5) is arranged in the door handle. The control unit has a unit for determining the resonance frequency of the ultrasonic sensor. A locking request is derived from the resonance frequency.