Electronic Brake PCB Mounting for Vibration Noise Reduction
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Solution Overview
Problem
Existing electronic brake devices for vehicles generate significant vibrations and high-frequency noise due to the use of multilayer ceramic capacitors on printed circuit boards, which affect vehicle stability and passenger comfort.
Innovation Solution
A noise reduction apparatus comprising a housing with inner protrusions, fastening parts with bolts and spacers, and a cover to secure and isolate the PCB, using elastically deformable spacers to absorb vibrations and a cover to shield noise, thereby reducing vibrations and noise transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If multiple multilayer ceramic capacitors are used on the PCB to assist current supply, then the current supply capability is improved, but vibration and high-frequency noise are generated
Solution Approach 1:
The patent introduces a damping material as an intermediary layer between the PCB and the housing. This damping material absorbs the vibration and high-frequency noise generated by the multilayer ceramic capacitors during current supply operations, thereby maintaining the current supply capability while reducing the harmful vibrations and noise transmitted to the housing.
Solution Approach 2:
The patent employs a damping material that can be easily replaced or adjusted. This approach allows for the use of cost-effective damping materials that can be substituted if they become degraded or ineffective over time, providing an economical solution to the vibration and noise problem without requiring complex or expensive permanent modifications to the PCB or housing structure.
2Stability of the object's composition
If the PCB is firmly fastened to the housing, then the structural stability is improved, but vibration noise is transmitted more effectively
Solution Approach 1:
The damping material serves as an intermediary between the PCB and the housing, allowing the PCB to be firmly positioned and fastened for structural stability while simultaneously absorbing vibration noise. This intermediary layer prevents direct rigid contact that would transmit vibrations, thus resolving the contradiction between firm fastening and noise transmission.
Solution Approach 2:
The patent uses a composite structure combining the rigid PCB, the viscoelastic damping material, and the rigid housing. This composite material approach allows the system to benefit from both the structural stability of rigid components and the vibration-damping properties of the viscoelastic material, effectively reducing vibration noise transmission while maintaining firm fastening.
3Strength
If a rigid housing structure is used, then the mechanical strength is improved, but vibration noise is amplified and transmitted
Solution Approach 1:
The patent creates a composite structure where the rigid housing provides mechanical strength and structural integrity, while the viscoelastic damping material integrated within the housing structure absorbs vibration noise. This composite approach allows the housing to maintain its strength while preventing noise amplification that would occur with a purely rigid structure.
Solution Approach 2:
The patent applies damping material specifically at locations where vibration and noise generation are most problematic, such as between the PCB and housing, and at mounting points. This localized application of damping properties allows the housing to maintain overall rigidity for mechanical strength while reducing noise amplification at critical areas through the viscoelastic material.
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
Effectively reduces vibrations and noise generated by circuit devices on the PCB, enhancing vehicle stability and passenger comfort by minimizing noise exposure.
Implementation Method 1
The spacers may be elastically deformable to absorb the vibration of the PCB part
Implementation Method 2
The cover part may include a material that shields vibration noise of circuit elements of the PCB part
Data Source
AI summary
A noise reduction device includes a housing, a printed circuit board (PCB) part installed in the housing and including circuit devices disposed thereon, and a fastening part configured to fasten the PCB part to the housing to reduce vibration of the PCB part.