Ultrasonic Sensor Mounting State Determination
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Solution Overview
Problem
Conventional ultrasonic sensors mounted on vehicles often fail to detect obstacles correctly due to improper mounting angles, requiring drivers to manually verify the sensor's position, which is cumbersome and inefficient.
Innovation Solution
A sensor mounting state determination device and method that uses a distance measurement section and determination section to assess the correct mounting of ultrasonic sensors by measuring the distance to a road surface based on transmission and reflection waves, allowing for self-diagnostic mode operations to verify the sensor's position without manual checks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual verification of sensor mounting is required, then mounting accuracy can be confirmed, but driver workload and time consumption increase
Solution Approach 1:
The ultrasonic sensor performs self-diagnosis by automatically measuring the distance to the road surface and comparing it with a predetermined value to determine its own mounting state, eliminating the need for manual verification by the driver
Solution Approach 2:
The system provides feedback to the driver through a display device that shows the measured distance and mounting state determination, allowing the driver to confirm correct mounting without manual inspection
2Measurement precision
If the ultrasonic sensor is mounted at an incorrect angle, then obstacle detection accuracy improves, but false detection of obstacles occurs
Solution Approach 1:
The system performs preliminary self-diagnosis by measuring the distance to the road surface before actual obstacle detection begins, ensuring the sensor is correctly mounted and preventing false detections from the outset
Solution Approach 2:
The system prevents false detection by proactively identifying incorrect mounting states through road surface distance measurement and alerting the driver before obstacle detection errors occur
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 drivers to determine the correct mounting of ultrasonic sensors without manual verification, ensuring accurate obstacle detection and reducing the need for cumbersome checks.
Implementation Method 1
the ultrasonic sensor transmit ultrasound (transmission wave). When an obstacle exists within an attainment range of the ultrasound, the ultrasound hits against and reflects off the obstacle, and then the ultrasonic sensor receives the reflected ultrasound (reflected wave)
Implementation Method 2
a distance to the obstacle is calculated based on time from transmission of the ultrasound to reception thereof
Data Source
AI summary
A sensor mounting state determination device includes distance measurement section that measures a distance to a road surface based on time from transmission of a transmission wave to reception of a reflection wave by an ultrasonic sensor that is mounted to a vehicle to transmit a transmission wave toward a road surface and receive a reflection wave reflected off the road surface. There is further provided a determination section configured to determine not only that the ultrasonic sensor is correctly mounted when the distance measured by the distance measurement section is identical to a predetermined distance, but also that the ultrasonic sensor is incorrectly mounted when the distance measured by the distance measurement section is not identical to the predetermined distance.