External Pipe Wall Diagnostics Using Heat-Flow Temperature Sensing
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Solution Overview
Problem
Existing pipe diagnostic systems are ineffective in environments with high noise and vibration, require offline access to pipes for assessment, and may introduce leakage points, making it difficult to detect corrosion and fouling in real-time without disrupting process fluid flow.
Innovation Solution
A heat-flow based pipe diagnostic system that uses a sensor capsule with temperature-sensitive elements coupled to the exterior of the pipe to measure and estimate process fluid temperature, allowing for online diagnostics without leakage points, by calculating heat transfer and comparing skin temperature measurements to detect build-up and corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If acoustic detection system is used for corrosion and fouling detection, then pipe condition can be detected online, but detection reliability deteriorates in environments with high process noise and vibration
Solution Approach 1:
The patent replaces the acoustic detection system with a thermal detection system. Instead of using acoustic sensors that are sensitive to noise and vibration, the invention uses temperature-sensitive elements and heat transfer calculations to detect pipe conditions. This substitution of the detection mechanism eliminates the reliability issues associated with acoustic methods in noisy environments while maintaining online detection capability.
2Measurement precision
If pipe diagnostic system requires access to interior of pipe, then comprehensive pipe assessment can be performed, but system must be taken offline and potential leakage points are created
Solution Approach 1:
The patent inverts the traditional approach by placing sensors on the exterior of the pipe rather than requiring interior access. The sensor capsule is coupled to the outer surface of the pipe, and through heat transfer analysis, it infers internal pipe conditions such as scaling and corrosion without needing to penetrate or access the pipe interior. This eliminates leakage risks and maintains system availability.
Solution Approach 2:
The patent uses the pipe wall itself as an intermediary medium. The temperature-sensitive elements measure temperature on the exterior surface, and through heat transfer calculations, the system derives information about internal pipe conditions. The pipe wall acts as a mediator that allows external sensors to indirectly measure internal conditions without direct access.
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, online monitoring of pipe conditions, reducing maintenance downtime and preventing pipe failures by accurately detecting scaling and corrosion without disrupting the process fluid flow, even in noisy environments.
Implementation Method 1
employ a heat transfer calculation with the transmitter reference measurement and the indication to generate an estimated process fluid temperature
Data Source
AI summary
A pipe diagnostic system includes a sensor capsule, measurement circuitry and a controller. The sensor capsule is configured to be coupled to an exterior surface of a pipe and has at least one temperature sensitive element disposed therein. The measurement circuitry is coupled to the sensor capsule and is configured to measure an electrical characteristic of the at least one temperature sensitive element and provide an indication of the measurement. The controller is coupled to the measurement circuitry and is configured to obtain a transmitter reference measurement and employ a heat transfer calculation with the transmitter reference measurement and the indication to generate an estimated process fluid temperature. The controller is further configured to obtain an indication of process fluid temperature and provide a pipe diagnostic indication based on a comparison of the estimated process fluid temperature and the obtained indication of process fluid temperature.