Axle Electronic Board Layout for High-Fidelity Vibration Sensing

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Electric motors in motor vehicles produce unsatisfactory sound and vibrational performance, affecting driver awareness and pleasure, and existing transducers generate noise and have unsatisfactory bandwidth, particularly in higher frequencies, impacting the fidelity of characteristic signals used in applications like road noise cancellation and vehicle stability control.

Innovation Solution

An axle for a motor vehicle equipped with an electric motor, an inverter, and an electronic board containing a transducer that detects vibrations, generating a signal processed by a control unit to emit sound and vibrations through loudspeakers and vibration emitters, using a band-pass filter and pitch-shifting techniques to enhance acoustic fidelity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If existing transducers are used to generate characteristic signals, then the system can detect vibrations, but the signal fidelity deteriorates due to significant noise and unsatisfactory bandwidth particularly in higher frequencies

Engineering Contradiction:

Improvesignal fidelityVSAvoidnoise in characteristic signal

Core Design Contradiction:

Measurement precisionVSObject-generated harmful factors

Solution Approach 1:

The patent extracts and removes the harmful noise components from the characteristic signal generated by the transducer. The noise removal unit specifically targets and eliminates noise while preserving the useful vibration information, thereby improving signal fidelity without sacrificing the transducer's detection capability

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces a signal processing chain with multiple intermediary units between the transducer and the final output. These include a differentiation unit, noise removal unit, and integration unit that collectively act as mediators to clean and refine the characteristic signal, transforming the noisy raw signal into a high-fidelity output suitable for accurate sound reproduction

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If the bandwidth of the transducer is increased to capture higher frequencies, then the signal richness improves, but the noise level also increases

Engineering Contradiction:

ImprovebandwidthVSAvoidnoise level

Core Design Contradiction:

Measurement precisionVSObject-generated harmful factors

Solution Approach 1:

The patent converts the harmful noise that inevitably accompanies wide-bandwidth signal capture into a benefit by using the noise removal unit to selectively eliminate noise components. The differentiation unit enhances high-frequency vibration signals while the noise removal unit subsequently removes the associated noise, thereby transforming the trade-off into a net gain for both bandwidth and signal quality

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Loss of information

If the characteristic signal accurately reproduces motor vibrations, then driver awareness and pleasure improve, but the complexity of the electronic board increases

Engineering Contradiction:

Improveinformation about motor operationVSAvoidelectronic board complexity

Core Design Contradiction:

Loss of informationVSDevice complexity

Solution Approach 1:

The patent merges multiple signal processing functions (differentiation, noise removal, integration) into a single integrated electronic board assembly. The electronic board comprises the transducer, differentiation unit, noise removal unit, and integration unit all working together as one unified device, thereby reducing overall system complexity while maintaining high signal fidelity for accurate motor operation reproduction

Inventive Principle:

Principle #5Merging (Combining)

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

Improves the fidelity of sound and vibrational signals, enhancing driver awareness and pleasure by accurately reproducing the motor's operation, while maintaining a wide bandwidth and reducing noise, applicable in road noise cancellation and vehicle stability systems.

Implementation Method 1

an electronic board comprising a transducer configured to detect a quantity indicative of a vibration of the axle and to generate a corresponding signal

Methodology Applied

Scientific EffectPiezoelectric effect: Piezoelectric Effect

Data Source

PatentUS20260008345A1Arrangement of an electronic board for a motor vehicle axle with an accelerometer generating a characteristic signal for the production of sound

Publication Date: 2026.01.08 FERRARI SPA

AI summary

An axle for a motor vehicle includes an electric motor having an outer casing, an electrical grid configured to power the motor and comprising an inverter in turn comprising a box internally defining a housing and attached to the outer casing, an electronic board comprising a transducer configured to detect a quantity indicative of a vibration of the axle and to generate a corresponding signal, characterized in that the electronic board is attached to the box.