Vehicle Control Panel Sensor Sheet Alignment Without Thermoforming

Solution Overview

Problem

Existing methods for manufacturing control devices for motor vehicles with raised sectors are prone to sensor deformation and misalignment due to thermoforming, requiring recalibration and increasing production costs and energy consumption.

Innovation Solution

A method involving the formation of flaps on the detection surface, secured using a die-forging machine, which eliminates the need for thermoforming and ensures precise sensor alignment without recalibration, allowing for complex shapes and reduced energy use.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If thermoforming is used to apply the sheet to the panel, then the sheet can be adjusted to the shape of the panel including raised sectors, but the sensors are deformed or displaced causing misalignment with control zones

Engineering Contradiction:

Improveshape adaptation of sheetVSAvoidsensor alignment precision

Core Design Contradiction:

ShapeVSManufacturing precision

Solution Approach 1:

The detection surface is segmented into multiple independent detection elements or zones, each capable of functioning independently. This segmentation allows the sheet to be divided into sections that can be separately positioned and secured to raised sectors, preventing deformation of individual sensor elements while maintaining overall shape adaptation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The sheet is pre-cut or pre-formed with specific geometric features (such as slits, folds, or flexible zones) before being applied to the panel. This preliminary action enables the sheet to conform to raised sectors without requiring high-temperature thermoforming that would deform the sensors, thus maintaining alignment precision while achieving shape adaptation.

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If recalibration is performed to correct sensor misalignment, then detection precision is improved, but manufacturing time and production cost increase

Engineering Contradiction:

Improvedetection precisionVSAvoidmanufacturing time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The sheet is pre-cut or pre-formed with specific geometric features (such as slits, folds, or flexible zones) before being applied to the panel. This preliminary action enables the sheet to conform to raised sectors without requiring high-temperature thermoforming that would deform the sensors, thus maintaining alignment precision while achieving shape adaptation.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The sheet structure is designed to self-align with control zones through its geometric features (such as complementary shapes, positioning elements, or flexible zones that naturally conform). This self-alignment mechanism eliminates the need for manual recalibration operations, reducing manufacturing time while maintaining detection precision.

Inventive Principle:

Principle #25Self-service

3Shape

If high temperature thermoforming is applied, then the sheet can be formed to complex shapes, but energy consumption increases

Engineering Contradiction:

Improvecomplex shape capabilityVSAvoidenergy consumption

Core Design Contradiction:

ShapeVSUse of energy by moving object

Solution Approach 1:

The sheet is pre-cut or pre-formed with specific geometric features (such as slits, folds, or flexible zones) before being applied to the panel. This preliminary action enables the sheet to conform to raised sectors without requiring high-temperature thermoforming that would deform the sensors, thus maintaining alignment precision while achieving shape adaptation.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The thermal forming process is replaced with a mechanical forming approach where the sheet is secured to raised sectors through mechanical means (such as adhesive bonding, clipping, or interlocking features) rather than heat-induced deformation. This substitution eliminates the need for high-temperature equipment, significantly reducing energy consumption while maintaining the ability to achieve complex shapes.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS20240253463A1Method for manufacturing a control device, and control device

Publication Date: 2024.08.01 NOVARES FRANCE

AI summary

A method for manufacturing a detection assembly for a control device intended to be integrated into a motor vehicle passenger compartment, the detection assembly including a panel comprising a raised sector provided with an edge, and a sheet including a detection surface provided with at least one sensor, the method including a step of forming at least one flap in the detection surface, a positioning step in which the sheet is positioned facing the panel, the detection surface being positioned opposite the raised sector, and a securing step in which the sheet is applied against the panel, the flap being moved so as to come into contact with an edge of the raised sector.