Induction Piston for Conduit Airflow Detection
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Solution Overview
Problem
The current methods for installing optical fibre units through pre-laid conduits are labor-intensive and costly, often requiring two operators due to uncertainties in conduit mapping and the potential for fibre units to get lost or misrouted, especially in complex network setups like FTTP initiatives.
Innovation Solution
A device and method that allows a single operator to confirm the correct conduit path and fibre unit installation by detecting airflow and fibre arrival using a piston with a metallic property that changes electrical properties, such as inductance, allowing for radio frequency communication to ensure accurate and efficient installation without the need for a second operator at the remote end.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two operators are used during installation (one at each end of the conduit path), then the status of the remote end can be monitored and confirmed, but the labour cost and complexity of the installation process increases
Solution Approach 1:
The device enables the installation system to monitor and confirm fibre arrival automatically without requiring a second operator at the remote end. The piston device with detector self-monitors the conduit status by detecting airflow and fibre bead arrival, eliminating the need for human intervention at both ends simultaneously.
Solution Approach 2:
The patent replaces the mechanical/human monitoring system (second operator physically present at remote end) with an automated detection system using a piston, air vent, and electrical detector that automatically senses airflow and fibre arrival, converting manual monitoring into an automated electromechanical system.
2Ease of operation
If conduit mapping is used to identify the correct path, then the desired destination can be targeted, but mistakes can be made especially in poor working conditions
Solution Approach 1:
The device provides real-time feedback to the operator by detecting airflow when air is blown into the correct conduit and by detecting the arrival of the fibre bead at the remote end. This feedback mechanism confirms correct conduit selection and installation completion, eliminating reliance on potentially error-prone conduit mapping alone.
Solution Approach 2:
The patent uses detectable changes in the electrical properties of the piston (via inductance changes when metallic bead arrives) as a signal equivalent to color changes - providing a clear, unambiguous indication of fibre arrival that is independent of external working conditions like lighting or weather.
3Productivity
If a single operator performs the installation, then labour cost is reduced, but the operator cannot independently confirm fibre arrival at the remote end
Solution Approach 1:
The device enables the single operator to independently monitor and confirm installation completion through the automated detection system. The piston device self-monitors airflow and fibre arrival, providing the operator with all necessary information locally without requiring communication with or presence of a second operator at the remote end.
Solution Approach 2:
The patent replaces the need for inter-operator communication and manual confirmation with an automated electromechanical detection system that provides immediate, objective feedback to the single operator about airflow status and fibre arrival, eliminating information loss.
4Length of moving object
If compressed air is blown into the conduit to propel the fibre unit, then the fibre can be transported through long distances, but it is difficult to detect when the fibre has reached the destination
Solution Approach 1:
The patent replaces difficult mechanical detection methods with an electromechanical sensing system. The electrical detector monitors changes in the piston's position and inductance, providing clear electronic signals that are much easier to detect and measure than mechanical fibre arrival indicators over long conduit spans.
Solution Approach 2:
The device detects fibre arrival by monitoring changes in electrical parameters (inductance changes when metallic bead approaches piston) rather than relying on mechanical or visual indicators. These parameter changes provide unambiguous detection signals that work effectively regardless of conduit length or external environmental conditions.
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
Enables single-operator installation of optical fibre units, reducing labour and costs by unambiguously confirming airflow and fibre arrival at the intended destination, thus improving the efficiency and accuracy of fibre optic cable deployment in FTTP networks.
Implementation Method 1
When air is blown into the tube, the piston moves from a first position to a second position in which the air vent opens allowing the air to flow out of the device
Implementation Method 2
a detector arranged to detect an electrical property change wherein the piston is configured for causing an electrical property change detectable by the detector
Data Source
Figure 1A~2B
Figure 3A~5
Figure 6~7
AI summary
A device for use with a conduit (4) having a first conduit end and a conduit second end, into which conduit a cable (2) can be installed using a flow of air into the first conduit end, the device being suitable for confirming that the air is flowing out from the second conduit end, the device comprising - a housing (20), - means to enable connection of the device to the second conduit end, - a detector (24) arranged to detect an electrical property change, and - an actuator (26) for causing an electrical property change detectable by the detector, wherein in use, the air flowing into the device causes the detector and the actuator to move relative to each other, causing an electrical property change.detectable by the detector.