Vehicle-Mounted Ultrasonic Sensor With Vibration-Isolating Rubber
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Solution Overview
Problem
Conventional ultrasonic sensors attached to vehicle bumpers experience significant vibration transmission, leading to false detections due to the coupling of vibrations between the sensor and the vehicle body.
Innovation Solution
The ultrasonic sensor design incorporates a housing component with a tubular section and a slippage-preventing flange, coupled with a vibration-proof rubber that includes an elastic spacer and insertion section to minimize vibration transmission by being interposed between the housing and the vehicle body component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ultrasonic sensor is directly attached to the vehicle body component, then the attachment is simple and secure, but vibration transmission occurs causing false detections
Solution Approach 1:
The patent introduces a vibration-proof rubber as an intermediary component between the housing component and the vehicle body component. This rubber layer absorbs and isolates vibrations from the vehicle body, preventing them from reaching the ultrasonic sensor and causing false detections, while still maintaining secure attachment.
Solution Approach 2:
The patent uses a composite attachment structure combining rigid housing components with flexible vibration-proof rubber. This composite approach allows the rigid parts to provide structural support and secure mounting, while the rubber provides vibration isolation, resolving the contradiction between secure attachment and vibration prevention.
2Reliability
If vibration-proof rubber is added to suppress vibrations, then false detections are reduced, but the attachment structure becomes more complex
Solution Approach 1:
The patent merges the vibration-proof rubber with the housing component to form an integrated attachment assembly. The rubber is positioned within the housing structure, combining the mounting function and vibration isolation function into a single integrated component rather than separate additions.
3Stability of the object's composition
If the housing component is securely fixed to prevent slippage, then attachment stability is improved, but vibration transmission may increase
Solution Approach 1:
The vibration-proof rubber serves as a mediator that maintains stable attachment while blocking vibration transmission. The rubber's elastic properties allow it to maintain firm contact between the housing and vehicle body for stability, while simultaneously absorbing vibrational energy to prevent harmful transmission to the sensor.
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
This configuration effectively suppresses vibration transmission, reducing false detections by securely attaching the sensor to the vehicle body while maintaining stability and preventing slippage.
Implementation Method 1
a vibration-proof rubber that, as a result of being attached to the housing component, is interposed between the housing component and the vehicle body component in an attached state
Implementation Method 2
an elastic spacer section that is formed into a ring shape so as to be held between the flange section and the vehicle body component
Data Source
AI summary
The ultrasonic sensor configured to be attached to a plate-shaped vehicle body component, comprises: a housing component; and a vibration-proof rubber interposed between the housing component and the vehicle body component. The housing component includes: a tubular section inserted into a through-hole that is formed in the vehicle body component; and a slippage-preventing flange section protruding at one end section in an axial direction. The vibration-proof rubber includes: an elastic spacer section that is formed into a ring shape so as to be held between the flange section and the vehicle body component in an attached state; and an insertion section that, as a result of being inserted through the through-hole and engaging with an inner edge, is projected in the axial direction from the elastic spacer section such that the housing component, to which the vibration-proof rubber has been attached, is held by the vehicle body component.