Linear Sensor Differential Coding for Long-Range Leak Detection

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Solution Overview

Problem

Existing linear sensors for detecting liquid leaks over long distances or large surfaces face challenges in reliability, cost, and flexibility, particularly in installations that require larger coverage areas and easier installation, maintenance, and replacement.

Innovation Solution

A method for coding communication conductors in linear sensors using a central unit to simultaneously increase voltage on one conductor and decrease voltage on another, allowing the central unit to measure the voltage difference and enabling two-way communication, with accessories like branches and terminators to create adaptable networks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If linear sensors are connected in series to form a sensing line for long-distance leak detection, then the coverage area and detection distance are improved, but the reliability and performance of the system deteriorate due to communication disturbances and faults

Engineering Contradiction:

Improvecoverage areaVSAvoidsystem reliability

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

The patent divides the communication bus into two separate communication conductors (first communication conductor and second communication conductor), allowing independent transmission of information signals. This segmentation enables the system to detect faults in individual conductors and maintain communication through the other conductor, thereby improving reliability while maintaining long-distance coverage capability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the communication method by measuring voltage difference between two conductors rather than using a single-conductor system. This parameter change allows the system to detect disturbances and faults more effectively, maintaining reliable communication over long distances and large coverage areas

Inventive Principle:

Principle #35Parameter changes

2Area of stationary object

If linear sensors are connected in series to cover large surfaces, then the detection range is improved, but the installation complexity and maintenance difficulty increase

Engineering Contradiction:

Improvedetection rangeVSAvoidinstallation complexity

Core Design Contradiction:

Area of stationary objectVSEase of operation

Solution Approach 1:

The two communication conductors serve multiple functions: they transmit information signals bidirectionally, enable fault detection through voltage difference measurement, and allow the system to adapt to various installation configurations. This multi-functionality simplifies installation and maintenance while supporting large detection ranges

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Device complexity

If traditional single-conductor communication is used in linear sensors, then the device complexity is reduced, but the measurement precision and fault detection capability deteriorate

Engineering Contradiction:

Improvecommunication structureVSAvoidvoltage measurement accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent replaces traditional single-conductor communication with a differential voltage measurement system using two conductors. This substitution enables precise measurement of voltage differences to detect faults and disturbances, improving measurement precision while the centralized control unit manages the increased complexity

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

Enhances network flexibility and reliability by allowing for unique system configurations, accurate fault localization, and efficient data transmission, while maintaining performance and reducing installation complexity.

Implementation Method 1

at least one information signal being coded by the central unit by increasing voltage T on the first communication conductor, at least one information signal being coded by the central unit by decreasing voltage T on the second communication conductor

Methodology Applied

Scientific EffectVoltage encoding: Electric Field

Implementation Method 2

the central unit reading a voltage by measuring the voltage difference between the two communication conductors

Methodology Applied

Scientific EffectVoltage difference measurement: Electric Field

Implementation Method 3

In the event of disturbances caused by the system environment, such as generators or voltage variations, the disturbances act on both communication conductors in the same direction and in the same way. When the central unit reads the voltage, the difference between the two communication conductors remains unchanged, and as a result, so does the reading.

Methodology Applied

Scientific EffectDifferential signaling: Electric Field

Data Source

PatentUS12392679B2Method for coding communication conductors of a linear sensor belonging to a system

Publication Date: 2025.08.19 TTK

AI summary

Disclosed is a method for coding communication conductors of a linear sensor belonging to a system, wherein the method includes the following steps: —coding at least two information signals simultaneously as follows: at least one information signal being coded by the central unit by increasing voltage T on the first communication conductor, at least one information signal being coded by the central unit by 10 decreasing voltage T on the second communication conductor, —the central unit reading a voltage by measuring the voltage difference between the two communication conductors.