Confined Space Lighting and Communication via Fiber Optics
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Solution Overview
Problem
In confined spaces, the need for artificial lighting and communication poses a risk of sparks or heat, which can lead to explosions or fires, and existing solutions are often expensive, heavy, and bulky, while communication is hindered by noise and visibility issues.
Innovation Solution
A system using fiber optic cables for illumination and communication that eliminates the need for electrical sources within the confined space, allowing for safe lighting and two-way communication without direct line-of-sight or noise interference, utilizing a light source box and decoder box with filters to transmit and interpret light signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrically intrinsically safe devices are used for lighting and communication in confined spaces, then safety is improved, but device cost, weight, and bulk increase
Solution Approach 1:
The patent replaces electrical systems with an optical system using fiber optic cables. The fiber optic cable transmits light from an external light source into the confined space, eliminating the need for electrical lighting devices inside the space. For communication, the system uses light signals transmitted through the fiber optic cable, replacing electrical communication devices. This substitution of electrical systems with an optical system achieves intrinsic safety without the weight and complexity of intrinsically safe electrical equipment.
2Reliability
If electrically intrinsically safe devices are used for lighting and communication in confined spaces, then safety is improved, but device complexity and bulk increase
Solution Approach 1:
The patent replaces complex electrical intrinsically safe devices with a simpler optical system. The fiber optic cable serves dual purposes: providing illumination and enabling communication through light signals. The system uses a light source box with filters and a decoder box, which are externally located, simplifying the equipment needed inside the confined space to just the passive fiber optic cable and basic optical components.
3Ease of operation
If traditional communication methods are used in confined spaces, then communication capability is maintained, but communication is hindered by noise and visibility issues
Solution Approach 1:
The patent replaces acoustic communication methods with optical communication using light signals transmitted through the fiber optic cable. This substitution eliminates the problem of noise interference completely, as light signals are not affected by acoustic environment. The system uses a decoder box that receives light signals and converts them into audible messages for the operator, providing clear communication regardless of external noise levels or visibility conditions inside the confined space.
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
Provides safe and reliable illumination and communication within confined spaces without introducing ignition sources, reducing the risk of fires or injuries and enabling effective communication through predefined light signals, regardless of noise levels or line-of-sight constraints.
Implementation Method 1
a fiber optic cable (26) is provided which has an outside end and an inside end, the inside end being locatable within the confined space 10 and the outside end being locatable outside the confined space 10
Implementation Method 2
a light source box (18) is provided which is locatable outside the confined space 10 and which is arranged to convert communication signals received from the remote location 12 into light signals
Implementation Method 3
a decoder box (20) is provided which has a sensor, the sensor being arranged to detect light signals transmitted along the fiber optic cable (26) and convert the light signals into electrical signals
Data Source
AI summary
A communications arrangement includes incoming and outgoing fiber optics cables, each having one end inside a confined space and another end outside of the confined space, with the incoming fiber optics cable transmitting light from outside of the confined space, to inside the confined space, through a gap and through a movable filter to the outgoing fiber optics cable, such that a user inside the confined space can transmit signals from inside the confined space to outside of the confined space by moving the movable filter.