Corrosion Sensor Network for Reinforced Concrete Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for determining corrosion in reinforced concrete structures are either destructive or rely on complex sensors that may fail and do not provide reliable, non-destructive, and comprehensive monitoring of corrosion states across the structure.
Innovation Solution
A network of sensors with a support system and temperature sensors, allowing non-destructive measurement of corrosion using potentiostatic pulses and eliminating the need for external reference electrodes, enabling accurate and representative corrosion monitoring across the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If destructive techniques are used to determine corrosion by uncovering the frame for electrochemical measurement, then measurement precision is improved, but the structure is damaged requiring repair mortars
Solution Approach 1:
The patent replaces mechanical/destructive exposure methods with electrochemical sensing methods. The sensor element and reference electrode perform electrochemical measurements without requiring physical uncovering or damage to the concrete structure, thus substituting a non-destructive electrical/chemical measurement system for a destructive mechanical exposure process
Solution Approach 2:
The patent introduces a sensor element as an intermediary device that can be embedded in the concrete to perform measurements. This intermediary sensor, combined with the reference electrode, enables corrosion measurement through the concrete without direct exposure of the reinforcement, acting as a mediator between the measurement system and the protected structure
2Reliability
If sensors are incorporated inside the reinforced concrete structure for monitoring corrosion, then non-destructive monitoring is achieved, but device complexity increases and failures may occur
Solution Approach 1:
The patent uses a reference electrode that replicates or copies the electrochemical environment of the reinforcement steel. By measuring the potential difference between the sensor element and this reference electrode, the system obtains corrosion information without requiring complex embedded sensor assemblies, simplifying the overall device design while maintaining measurement reliability
3Measurement precision
If a single sensor is placed in one location of the structure, then local corrosion state is monitored, but comprehensive coverage of the entire structure is not achieved
Solution Approach 1:
The patent divides the structure into multiple measurement zones by placing sensor elements at different locations (e.g., on different reinforcement bars or at different structural positions). Each sensor element with its reference electrode creates an independent measurement point, and collectively these segmented measurements provide comprehensive coverage of the entire structure's corrosion state
4Measurement precision
If external reference electrodes and guard rings are used for electrochemical measurements, then measurement accuracy is improved, but device complexity and installation difficulty increase
Solution Approach 1:
The patent merges the reference electrode function with the sensor element assembly. The reference electrode is positioned in close proximity to the sensor element, and both work together as an integrated measurement unit. This merging eliminates the need for separate guard ring assemblies and complex external reference electrode installations, simplifying the overall system while maintaining measurement accuracy through the coupled electrochemical measurement process
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
This method provides reliable, non-destructive, and cost-effective monitoring of corrosion, reducing maintenance costs and enabling early intervention, with high accuracy and comprehensive coverage of the structure's corrosion state.
Implementation Method 1
applying to said sensor element a train of potentiostatic pulses allowing determining a value of polarization resistance
Implementation Method 2
determining a value of polarization resistance conferred by the frame in the region in which the sensor element is connected
Implementation Method 3
determining a value of temperature of said sensor element
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a sensor and to a network of a plurality of sensors, for determining the corrosion in a reinforced concrete structure, each sensor comprising a support for coupling it to a bar of a frame of a concrete structure; a sensor element secured to the frame by means of the support; a temperature sensor; conduction and connection elements for electrically insulating and connecting the frame, the sensor element and the temperature sensor; and an external connector attached to the sensor element and to the frame by means of the conduction and connection elements and formed by a connector inside a connection box embedded in the surface of the concrete structure. The invention also relates to an associated method and computer program for determining the corrosion in a reinforced concrete structure by means of using the sensors of the invention.