Multi-Probe Corrosion Sensor for Reinforced Concrete
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Solution Overview
Problem
Reinforced concrete structures are prone to chloride-induced corrosion, leading to premature failure due to the permeability of the passivating layer on reinforcing materials, which can cause cracking and spallation of the concrete, and existing monitoring methods lack comprehensive and continuous measurement of key parameters like chloride concentration, pH, and corrosion rates.
Innovation Solution
A corrosion sensor system embedded in reinforced concrete structures, comprising a chloride probe, pH probe, multiple array corrosion rate sensor, and resistivity probe, along with a reference electrode, which can be used in conjunction with a data acquisition system for continuous or periodic monitoring of corrosion status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple probes (chloride, pH, resistivity, corrosion rate) are integrated into a single sensor system, then measurement comprehensiveness is improved, but device complexity increases
Solution Approach 1:
The patent integrates multiple independent measurement functions (chloride concentration sensing, pH sensing, resistivity measurement, and corrosion rate monitoring) into a single multi-functional sensor assembly. This merging approach allows comprehensive corrosion monitoring while reducing the number of separate devices needed, thereby improving measurement comprehensiveness without proportionally increasing overall system complexity.
Solution Approach 2:
The sensor system is designed with multi-functionality, where a single sensor assembly performs multiple measurement tasks simultaneously. The chloride probe, pH probe, resistivity probe, and corrosion rate sensor all operate within one integrated unit, enabling the system to monitor various corrosion-related parameters comprehensively while maintaining a unified device structure.
2Reliability
If continuous monitoring of multiple corrosion parameters is implemented, then structural integrity assessment is improved, but cost and data management complexity increase
Solution Approach 1:
The patent incorporates a data acquisition system that continuously collects measurements from all probes and provides feedback for real-time corrosion monitoring. This feedback mechanism enables ongoing assessment of structural integrity by analyzing trends in chloride concentration, pH, resistivity, and corrosion rate data, allowing for timely detection of deteriorating conditions while systematically managing the complexity of multiple data streams.
3Reliability
If comprehensive corrosion monitoring is implemented, then early detection capability is improved, but system complexity and installation difficulty increase
Solution Approach 1:
By combining multiple measurement functions into a single integrated sensor assembly, the patent simplifies the installation process compared to deploying separate probes for each measurement type. The unified design reduces the number of installation steps, connection points, and calibration procedures required, thereby improving ease of manufacture and installation while maintaining comprehensive early detection capability for corrosion issues.
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
The system effectively measures chloride concentration, pH, and corrosion rates, providing comprehensive data for monitoring the integrity of reinforced concrete structures, enabling early detection of potential corrosion issues and reducing the risk of structural failure.
Implementation Method 1
a chloride probe held in the sensor body
Implementation Method 2
a pH probe held in the sensor body
Implementation Method 3
a multiple array corrosion rate sensor held in the sensor body
Implementation Method 4
a resistivity probe held in the sensor body
Data Source
AI summary
A corrosion sensor may include a sensor body, a chloride probe held in the sensor body, a pH probe held in the sensor body, a reference electrode for the chloride probe and the pH probe held in the sensor body, a multiple array sensor held in the sensor body and a resistivity probe held in the sensor body. A method of measuring corrosion in a reinforced concrete structure may include inserting a corrosion sensor into a reinforced concrete structure and monitoring chloride ions with the chloride probe, pH with the pH probe, localized concrete resistivity with the resistivity probe and corrosion current density with the multiple array sensor.