Leakage Detection Instrument Using Multi-Band Antenna Segmentation
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Solution Overview
Problem
Current methods for detecting leakage in cable network systems are inefficient, as they either require manual signal level meter monitoring or truck-mounted units, which are limited in their ability to accurately locate and quantify leakage across multiple frequency bands.
Innovation Solution
An instrument system comprising a transmitter that generates signals across a range of 100 MHz to 1.2 GHz and an antenna assembly coupled with a signal level meter to scan and determine leakage amplitude and frequency, allowing for precise localization of leakage sources at subscriber premises.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual signal level meter monitoring is used, then leakage detection can be performed, but the detection efficiency and accuracy are insufficient
Solution Approach 1:
The frequency range is divided into multiple sub-bands, with each antenna element tuned to a specific sub-band. This segmentation allows parallel detection across different frequency ranges, improving both accuracy in identifying leakage sources and efficiency by simultaneously scanning multiple bands rather than sequentially
Solution Approach 2:
The system uses the existing cable network infrastructure and signal sources to perform self-diagnosis. The leakage detection system utilizes signals already present in the network, eliminating the need for external trucks or manual monitoring while maintaining high detection accuracy across the entire frequency range
2Ease of operation
If truck-mounted units are used for leakage detection, then mobile monitoring is enabled, but the ability to accurately locate and quantify leakage across multiple frequency bands is limited
Solution Approach 1:
The system transitions from single-frequency detection to multi-dimensional frequency band detection by deploying multiple antenna elements, each sensitive to different frequency sub-bands. This dimensional expansion in frequency space enables accurate localization and quantification of leakage sources while maintaining mobile operation capabilities
Solution Approach 2:
The antenna assembly is designed to universally detect signals across the entire cable network frequency range (5-1000 MHz) by combining multiple frequency-selective antenna elements. This multi-functional design allows a single portable device to perform comprehensive leakage detection across all bands, replacing the need for multiple specialized tools
3Device complexity
If single-frequency detection is used, then the detection device is simple, but the comprehensive scanning capability across frequency bands is insufficient
Solution Approach 1:
The frequency detection range is segmented into multiple sub-bands, with each antenna element designed to respond to a specific frequency range. This segmentation allows the system to maintain relatively simple individual antenna designs while achieving comprehensive frequency band coverage through the combination of multiple elements
Solution Approach 2:
Multiple frequency-selective antenna elements are merged into a single integrated assembly that can detect signals across the entire cable network frequency range. The combining of these elements creates a versatile detection device that maintains manageable complexity through modular construction while providing comprehensive frequency scanning capability
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 effective detection and localization of leakage sources across multiple frequency bands, improving the accuracy and efficiency of cable network system maintenance by providing a comprehensive scanning capability.
Implementation Method 1
an antenna assembly operable to receive signals in multiple frequency sub-bands
Data Source
AI summary
An instrument system for locating leakage at a subscriber's premises is disclosed.