Sensor Bracket Split Body Design for Reflection Control

Solution Overview

Problem

The increasing wide angle of visibility in cameras complicates maintenance around the sensor hood and leads to irregular reflection of electromagnetic waves, affecting detection accuracy due to the detachable structure's design.

Innovation Solution

A sensor bracket with a sensor hood featuring a flat front surface divided into a fixed and a separable split body, where the split section is positioned closer to the detection center axis, minimizing step differences and reflections by ensuring the stepped surface does not face the detection unit, and incorporating a reflected wave-reducing structure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of repair

If the detachable structure is provided to facilitate maintenance access to the sensor hood, then ease of repair is improved, but irregular reflection of electromagnetic waves toward the detection unit occurs, worsening measurement precision

Engineering Contradiction:

Improvemaintenance accessVSAvoiddetection accuracy

Core Design Contradiction:

Ease of repairVSMeasurement precision

Solution Approach 1:

The sensor hood is divided into a detachable first portion and a fixed second portion. The first portion can be removed to provide maintenance access, while the second portion remains fixed to maintain the flat front surface and prevent irregular reflections. This segmentation allows the hood to be maintained without compromising detection accuracy.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If the angle of view is widened to improve detection performance, then adaptability is improved, but the size of detachable parts increases, worsening ease of operation for maintenance

Engineering Contradiction:

Improveangle of viewVSAvoidmaintenance workability

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The sensor hood is divided into a detachable first portion and a fixed second portion. The first portion can be removed to provide maintenance access, while the second portion remains fixed to maintain the flat front surface and prevent irregular reflections. This segmentation allows the hood to be maintained without compromising detection accuracy.

Inventive Principle:

Principle #1Segmentation

3Measurement precision

If the flat front surface is formed to minimize reflections, then measurement precision is improved, but device complexity increases due to the split structure

Engineering Contradiction:

Improvedetection accuracyVSAvoidstructure complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The sensor hood is divided into a detachable first portion and a fixed second portion. The first portion can be removed to provide maintenance access, while the second portion remains fixed to maintain the flat front surface and prevent irregular reflections. This segmentation allows the hood to be maintained without compromising detection accuracy.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11237029B2Sensor bracket

Publication Date: 2022.02.01 HONDA MOTOR CO LTD

AI summary

A sensor hood (21) includes a bottom surface-forming section (26) that forms a flat bottom surface (26a) facing a detection space (K1). When seen from a height direction (Z1) perpendicular to a surface width direction (X1) and a surface forward/rearward direction (Y1) of the bottom surface (26a), a split section (P1) between a fixed body (30) and a split body (40) divides the bottom surface (26a) into a first range (H1) including an optical axis (CL3) in the surface width direction (X1) and a second range (H2) that avoids the optical axis (CL3). The first range (H1) is disposed at the same height as the second range (H2) in the height direction (Z1) and disposed closer to the optical axis (CL3) than the second range (H2).