Pyramidal Sensor Housing for Forestry Vehicles
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Solution Overview
Problem
Existing external sensor arrays on forestry vehicles are vulnerable to damage from tree strikes, tree limb strikes, and tree debris, which can lead to sensor displacement or failure, and are often incompatible with rollover protection systems and cab roof escape hatches.
Innovation Solution
A pyramidal-shaped external sensor array housing with rib sections extending from the peak to the base to deflect tree strikes and spread the load, side panels to deflect tree debris, and a detachable magnetic attachment mechanism to ensure the housing remains attached during normal use but detaches during a rollover event.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed attachment mechanism is used to secure the sensor housing to the vehicle roof, then the housing remains firmly attached during normal operation, but the housing cannot detach automatically during a rollover event to prevent damage
Solution Approach 1:
The attachment mechanism transitions from a static fixed state during normal operation to a dynamic detached state during rollover events. The magnetic attachment system allows the housing to be securely held during ordinary use but automatically releases when subjected to extreme forces or specific triggering conditions, enabling the system to adapt its attachment state based on operational context.
Solution Approach 2:
The attachment mechanism changes its holding parameter (magnetic force) based on operational conditions. During normal operation, the magnetic force maintains secure attachment, but during rollover events, the force parameter is reduced or reversed to enable automatic detachment, allowing the same mechanism to serve dual purposes.
2Measurement precision
If the sensor housing is mounted high on the vehicle roof for optimal sensor visibility, then the sensor array achieves better line-of-sight coverage, but the housing becomes more vulnerable to tree strikes and debris impact
Solution Approach 1:
The pyramidal housing structure incorporates energy-absorbing features and load-distributing rib sections that are designed beforehand to cushion and deflect tree strike impacts. The geometric shape and structural reinforcements are pre-configured to mitigate damage before the impact reaches the sensitive sensor components inside.
Solution Approach 2:
The housing design converts the harmful impact force from tree strikes into beneficial load distribution across the pyramidal structure. The rib sections and geometric shape transform concentrated impact forces into distributed stresses that the structure can better withstand, turning the harmful strike into a manageable load.
3Strength
If robust protective structures are added to shield the sensor array from tree strikes, then the housing resistance to damage improves, but the sensor field-of-view and line-of-sight coverage are obstructed
Solution Approach 1:
The housing is segmented into multiple functional zones: protective external rib sections that handle impact forces, transparent or open sensor bay portions that maintain field-of-view, and internal chambers that house electronics. This segmentation allows different parts to serve different functions - protection versus visibility - simultaneously.
Solution Approach 2:
Different portions of the housing have different properties: the external rib sections are opaque and protective, while the sensor bay areas are transparent or open to preserve line-of-sight. The housing structure applies local quality by making specific regions protective while keeping other regions transparent, allowing both protection and visibility requirements to be met in their respective locations.
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 pyramidal housing effectively protects the sensor array from tree strikes and debris, maintains attachment during normal use, and automatically detaches during rollovers to prevent damage and ensure operator safety.
Implementation Method 1
an attachment mechanism to detachably attach a lower surface of the pyramidal shape housing onto an exterior portion of roof of a cab of a forestry vehicle
Implementation Method 2
rib sections disposed on at least the exterior edges of a pyramidal-shaped housing and extending from a peak above the sensor bay to a base section of the pyramidal-shaped house to deflect tree strikes from the sensor bay portion and spread the load of tree strikes
Data Source
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AI summary
An external sensor array housing projects sensor in a hazardous forestry environment in which there are tree falls, tree limb impacts, and tree debris. The external sensor array housing may be mounted to a suitable external portion of a forestry vehicle, such as on the roof. A variety of protective features are provided against tree strikes, tree limb impacts, and tree debris.