Adaptive Ultrasonic Sensor Range for Vehicle Parking Blind Zone
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Solution Overview
Problem
Ultrasonic sensors in vehicles have a blind zone in the proximity area, which can prevent smooth remote smart parking assist in narrow spaces, as they fail to detect objects within this zone, leading to potential collisions.
Innovation Solution
A vehicle system that adaptively adjusts the sensing distance of ultrasonic sensors based on user inputs for automatic parking or remote control, using a controller to adjust the sensing distance and control steering, power, or braking devices, allowing for reduced or increased detection ranges to enhance object detection and collision risk assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the ultrasonic sensor uses a fixed long sensing distance to provide parking distance warning, then the sensing range is improved, but a blind zone is created in the proximity area causing failure to detect nearby objects
Solution Approach 1:
The patent applies dynamics by making the sensing distance of the ultrasonic sensor adjustable rather than fixed. The controller dynamically changes the sensing distance based on the detected state (manual operation vs. automatic parking mode), switching between a first sensing distance for general parking warning and a second sensing distance for narrow space automatic parking, thereby eliminating the blind zone while maintaining adequate sensing range.
Solution Approach 2:
The patent changes the parameter of sensing distance based on operational mode. When automatic parking is detected, the controller adjusts the sensing distance parameter to a shorter second distance suitable for narrow spaces, whereas in manual mode it maintains a longer first sensing distance for comprehensive parking warning coverage.
2Length of stationary object
If the ultrasonic sensor uses a long sensing distance to detect distant objects, then the parking distance warning capability is improved, but the minimum detection distance increases creating a blind zone
Solution Approach 1:
The system dynamically adjusts the sensing distance parameter based on the operational context. In narrow space automatic parking scenarios, the sensing distance is reduced to eliminate the blind zone, enabling smooth operation. In other parking scenarios, the longer sensing distance is maintained for effective parking distance warning.
Solution Approach 2:
The sensing distance parameter is changed according to the detected mode. The controller switches between a first sensing distance parameter for general parking assistance and a second sensing distance parameter for narrow space automatic parking, optimizing both detection range and operational smoothness for different scenarios.
3Measurement precision
If the sensing distance is reduced to eliminate blind zone, then the detection of nearby objects is improved, but the sensing range for distant objects is reduced
Solution Approach 1:
The system uses dynamic adjustment of sensing distance based on operational needs. When automatic parking in narrow spaces is detected, the sensing distance is reduced to improve proximity detection and eliminate blind zones. When manual parking assistance is needed, the sensing distance is increased to maintain comprehensive sensing range for distant objects.
Solution Approach 2:
The sensing distance parameter is adaptively changed based on the operational mode detected by the controller. The system switches between a first sensing distance parameter that provides extended range for manual assistance and a second sensing distance parameter that provides extended range for automatic parking, ensuring optimal performance for each mode.
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 efficient and precise remote smart parking assist in narrow spaces by reducing the minimum detection distance and increasing the sensing range as needed, improving collision risk management and parking stability.
Implementation Method 1
an ultrasonic sensor configured to detect an external object
Data Source
AI summary
A vehicle that can adaptively adjust a sensing distance of an ultrasonic sensor according to operation of the vehicle includes: a steering device for steering a wheel; a power device for transmitting power to the wheel; a braking device for braking the wheel; an ultrasonic sensor for detecting an external object; an input device for receiving an input from a user; a transceiver for communicating with a user terminal; and a controller for adjusting a sensing distance of the ultrasonic sensor based on whether a user input for automatic parking is received through the input device or the transceiver and controlling at least one of the steering device, the power device, or the braking device based on an output of the ultrasonic sensor and the user input.