Elastomer-Isolated Crossbar Assembly for Vehicle Sensor Vibration Damping
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Solution Overview
Problem
Sensors mounted on mobile vehicles experience resolution loss due to vibrations and sudden accelerations transmitted through the payload system mount, which are not effectively isolated or damped, leading to detrimental effects on sensor functionality.
Innovation Solution
A crossbar system with elastomeric isolators is used to decouple and dampen vibrations between the payload system mount and the sensor assembly, comprising a first and second crossbar assembly with isolators that partially decouple the structure interface from the payload mount interface, allowing relative movement in multiple degrees of freedom and reducing vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the crossbar system rigidly couples the payload system mount to the sensor assembly, then structural strength and stability are improved, but vibrations and accelerations are transmitted to the sensor causing resolution loss
Solution Approach 1:
The crossbar system is divided into multiple segments (first crossbar assembly and second crossbar assembly) connected by isolators, creating a segmented structure that can isolate vibrations while maintaining overall structural integrity. Each crossbar assembly can move independently to some degree, allowing vibration isolation while preserving strength.
Solution Approach 2:
Elastomeric isolators are introduced as intermediary elements between the crossbar assemblies and the sensor assembly. These isolators act as mediators that decouple the rigid connection, allowing the structure to maintain strength while the isolators absorb and dampen vibrations before they reach the sensor.
2Object-affected harmful factors
If elastomeric isolators are used to decouple and dampen vibrations, then sensor isolation from vibrations is improved, but structural rigidity and stability are reduced
Solution Approach 1:
The isolators are strategically placed at specific locations where vibration isolation is most needed, rather than making the entire structure flexible. This localized application of flexibility allows vibration damping at critical interfaces while maintaining overall structural stability through the rigid crossbar segments.
Solution Approach 2:
The system combines rigid crossbar segments (providing structural stability) with elastomeric isolator materials (providing vibration damping). This composite approach creates a hybrid structure that exhibits both rigidity for stability and flexibility for vibration isolation, resolving the contradiction between these opposing requirements.
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 crossbar system effectively isolates the sensor assembly from external vibrations, reducing their impact and maintaining sensor resolution by dampening vibrations and allowing for flexible movement, thus enhancing the operational stability of sensors on mobile vehicles.
Implementation Method 1
The isolator comprises an elastomeric component operable to elastically deform in response to relative movement between the outer and inner crossbar segments
Implementation Method 2
The isolator operates to partially decouple the outer crossbar segment from the inner crossbar segment and dampen vibrations propagating between the outer and inner crossbar segments
Data Source
AI summary
A crossbar assembly for facilitating isolation of a sensor assembly from vibration of a payload mounting system on a vehicle comprises an outer crossbar segment, an inner crossbar segment, and an isolator. The outer crossbar segment comprises a payload mount interface operable to mount to a payload mount, and an outer isolator interface operable to mount to an isolator. The inner crossbar segment comprises a structure interface to mount to a structure, and an inner isolator interface operable to mount to the isolator. The isolator can be supported by the outer and inner crossbar segments. The isolator comprises an elastomeric component operable to elastically deform in response to relative movement between the outer and inner crossbar segments. The isolator operates to partially decouple the outer crossbar segment from the inner crossbar segment and dampen vibrations propagating between the outer and inner crossbar segments.