Conductive Multilayer Hose for Continuous Pressure and Temperature Sensing
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Solution Overview
Problem
Existing pressure and temperature sensors in hoses require complex structural modifications and are often limited to threshold detection rather than continuous measurement, especially for pressure.
Innovation Solution
A multilayer hose with an electrically conductive layer that changes conductivity with pressure and temperature, allowing direct measurement of these parameters via electrical resistance without additional sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional pressure and temperature sensors are used in hoses, then measurement capability is achieved, but structural complexity increases due to additional branches, complex integration into hose structure, and routing of signal lines
Solution Approach 1:
The patent combines the measurement function directly into the hose wall by embedding conductive elements within the hose layers themselves. The conductive reinforcement layer or conductive elastomer layer serves dual purposes: structural reinforcement and electrical resistance measurement, eliminating the need for separate sensor assemblies, branches, and signal line routing.
Solution Approach 2:
The hose structure itself performs the measurement function through its inherent conductive layers. The electrical resistance of the conductive layer changes in response to pressure and temperature, allowing the hose to self-monitor its operational parameters without requiring external sensing components.
2Measurement precision
If conventional sensors are inserted through the hose wall or connected via T-piece, then measurement is possible, but the hose structure becomes more complex and measurement continuity is limited
Solution Approach 1:
The measurement function is merged into the continuous hose structure through embedded conductive layers. This integration enables continuous measurement along the entire length of the hose without interruption, unlike discrete sensor points required by T-piece or through-wall sensor approaches.
3Reliability
If threshold detection sensors are used, then simple detection is achieved, but continuous measurement capability is lost
Solution Approach 1:
The electrical resistance of the conductive layer changes continuously in response to varying pressure and temperature conditions. By measuring these continuous resistance variations, the system achieves continuous measurement capability rather than discrete threshold detection, while maintaining reliable correlation between resistance changes and physical parameters.
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 continuous, direct, and accurate measurement of pressure and temperature within the hose by correlating electrical resistance changes with applied pressure or temperature.
Implementation Method 1
the at least one electrically conductive layer is connected to a measuring device configured to measure the electrical resistance of the at least one electrically conductive layer
Implementation Method 2
the at least one electrically conductive layer is connected to a measuring device configured to measure the electrical resistance of the at least one electrically conductive layer
Data Source
Figure 1~2
AI summary
The present invention relates to a single- or multi-layer hose comprising at least one electrically conductive layer, wherein the at least one electrically conductive layer is connected to a measuring device configured to measure the electrical resistance of the at least one electrically conductive layer, a method for measuring pressure and/or temperature in such a single- or multi-layer hose based on the measured electrical resistance, and the use of such a single- or multi-layer hose in a motor vehicle.