Flexible Thermoelectric Sensor for Dual-Parameter Measurement
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Solution Overview
Problem
Existing fluid measurement technologies face limitations in simultaneously measuring temperature and flow velocity without disrupting fluid flow, requiring additional devices and power sources, and are not suitable for curved paths or self-power generation.
Innovation Solution
A flexible sensor array with a thermoelectric body on a flexible substrate, featuring geometric patterns and connected metal electrodes, which measures temperature and flow velocity without obstructing fluid flow and can self-power using the fluid's temperature, suitable for curved paths and existing pipes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a float unit and magnetic material are added to measure flow velocity, then flow velocity measurement is enabled, but the fluid properties may be changed and the device complexity increases
Solution Approach 1:
The patent combines temperature sensing and flow velocity measurement functions into a single integrated sensor device. The thermoelectric body simultaneously detects temperature differences (for velocity measurement) and temperature (for thermal measurement), eliminating the need for separate float units and magnetic materials. This merging reduces device complexity while maintaining measurement capabilities.
Solution Approach 2:
The patent replaces the mechanical float unit system with a thermoelectric-based measurement system. Instead of using a physical float that moves with the fluid, the invention uses temperature differential detection across the thermoelectric body to infer flow velocity. This substitution eliminates mechanical components that could alter fluid properties while achieving the same measurement objective.
2Measurement precision
If a temperature sensor is inserted into the pipe, then temperature measurement is enabled, but the fluid flow is interfered and additional pipe modification is required
Solution Approach 1:
The patent creates a multi-functional sensor that can measure both temperature and flow velocity simultaneously. The thermoelectric body serves dual purposes: detecting temperature differences for velocity calculation and absolute temperature for thermal measurement. This universality eliminates the need for separate temperature and velocity sensors, reducing installation complexity and avoiding fluid flow interference.
Solution Approach 2:
The sensor utilizes the fluid's own thermal energy and temperature differential to generate the measurement signal. The thermoelectric body harnesses the natural temperature difference between the incoming and outgoing fluid to produce a voltage signal proportional to flow velocity, requiring no external power source or complex installation. The sensor essentially uses the fluid's own properties to enable measurement without disrupting its flow.
3Reliability
If additional power supplier is added, then sensor operation is enabled, but additional space is occupied and device complexity increases
Solution Approach 1:
The thermoelectric sensor is self-powered by utilizing the temperature differential inherent in the flowing fluid. As the fluid passes over the thermoelectric body, a temperature gradient is created that generates an electrical voltage through the Seebeck effect. This self-generated voltage provides the signal needed for measurement without requiring any external power source, batteries, or complex power supply systems, thereby reducing device complexity and installation requirements.
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
Accurately measures both temperature and flow velocity without additional power, maintaining functionality on curved surfaces and enabling continuous, self-sustaining operation.
Implementation Method 1
a thermoelectric body formed on the flexible substrate; a first metal electrode that is formed on the flexible substrate and is connected to one end of the thermoelectric body; and a second metal electrode that is formed on the flexible substrate and is connected to another end of the thermoelectric body
Data Source
AI summary
The present description includes a flexible sensor including a flexible substrate, a thermoelectric substrate formed on the flexible substrate, a first metal electrode that is formed on the flexible substrate and is connected to one end of the thermoelectric body, and a second metal electrode that is formed on the flexible substrate and is connected to another end of the thermoelectric body but spaced apart from the first metal electrode. The flexible sensor simply measures the temperature and the flow velocity with high accuracy. The change in temperature and flow velocity may be measured in real time. In addition, the flexible sensor may measure the temperature and the flow velocity of a fluid even when attached to a curved surface, and self-development is possible by the measurement.