Concrete Sensor System with Dynamic Chloride Threshold Correction
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Solution Overview
Problem
Existing systems for monitoring the internal micro-environmental conditions of reinforced concrete structures, particularly in marine environments, fail to accurately and synchronously measure critical chloride ion concentration, leading to inaccurate degradation warnings and unpredictable service life predictions due to temperature and pH influences on sensors.
Innovation Solution
A life-cycle performance intelligent-sensing and degradation warning system that includes a multifunctional sensor module with temperature, humidity, chloride ion-pH gradient, and Hall voltage type steel-bar corrosion sensors, connected to a main control module for real-time data processing and dynamic threshold setting, which corrects sensor data for temperature and pH influences, and provides timely warnings through a critical warning module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional independent monitoring devices are used to detect internal micro-environmental factors, then device complexity is reduced, but measurement precision and reliability of chloride ion concentration and other parameters deteriorate due to lack of synchronous acquisition and environmental correction
Solution Approach 1:
The patent combines multiple independent monitoring devices into an integrated monitoring system that synchronously acquires temperature, humidity, chloride ion concentration, pH value, and other parameters. This merging approach enables coordinated measurement and environmental correction, resolving the contradiction by improving measurement precision through systematic integration while managing device complexity through unified architecture.
Solution Approach 2:
The monitoring system is designed with multi-functional capabilities to simultaneously measure multiple parameters (temperature, humidity, chloride ions, pH) and perform environmental correction. This universal approach allows a single system to address multiple measurement needs, improving overall measurement precision without proportionally increasing device complexity.
2Measurement precision
If sensor data is used without temperature and pH correction, then ease of operation is improved, but measurement precision deteriorates due to environmental influences on sensor readings
Solution Approach 1:
The system implements automatic environmental correction by using feedback from temperature and pH sensors to adjust chloride ion concentration measurements. The correction algorithm continuously monitors environmental parameters and applies real-time adjustments to sensor readings, maintaining measurement precision while automating the correction process to minimize operational complexity.
Solution Approach 2:
The monitoring system performs self-correction of measurement data by automatically compensating for temperature and pH influences on sensor readings. This self-service capability enables the system to maintain high measurement precision without requiring manual intervention for environmental correction, thus preserving ease of operation.
3Reliability
If static critical chloride ion concentration values are used, then ease of operation is improved, but reliability deteriorates due to varying environmental conditions affecting corrosion thresholds
Solution Approach 1:
The system transitions from static to dynamic critical chloride ion concentration thresholds by continuously adjusting warning levels based on real-time temperature and pH measurements. This dynamic approach improves reliability of degradation warnings by accounting for environmental variations that affect corrosion thresholds, while the automated adjustment mechanism manages the complexity of threshold adaptation.
Solution Approach 2:
The system changes the critical chloride ion concentration parameter dynamically based on environmental conditions (temperature and pH). By adjusting this key parameter in response to environmental variations, the system maintains high reliability in degradation warnings without requiring complex manual intervention, as the parameter adaptation is automatically driven by sensor data.
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 monitors and predicts the health status of reinforced concrete structures, enabling timely degradation warnings and precise service life predictions by dynamically adjusting critical chloride ion concentration based on real-time environmental parameters, enhancing durability evaluation and protection.
Implementation Method 1
将Ag/AgCl电极和Ir/IrOx-pH电极埋入到混凝土中，利用Ag/AgCl电极响应Cl-离子浓度，Ir/IrOx-pH电极响应pH值的变化
Implementation Method 2
将Ag/AgCl电极和Ir/IrOx-pH电极埋入到混凝土中，利用Ag/AgCl电极响应Cl-离子浓度，Ir/IrOx-pH电极响应pH值的变化
Implementation Method 3
对Ir/IrOx-pH电极和Ag/AgCl电极的实测电位-温度数据进行线性拟合，得到拟合方程，从而得到20℃下的电位值
Implementation Method 4
Hall voltage type steel-bar corrosion sensors
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A life-cycle performance intelligent-sensing and degradation warning system and method for concrete structures are disclosed. The warning system comprises a main control module, a multifunctional sensor module, an anti-theft module and a critical warning module. Environmental parameters in concrete are monitored by the multifunctional sensor module, and the remaining service life of a concrete structure is accurately predicted through a life prediction model according to the temperature, humidity, chloride ion concentration and pH at different depths, and a critical chloride ion concentration and a structure stress status that are dynamically obtained. In addition, during warning analysis, a targeted correction method is designed for acquired data, and temperature and pH correction is carried out for real-time monitoring data of the chloride ion sensor to further guarantee the accuracy of monitoring data, such that scientific references are provided for durability evaluation, protection and restoration of the structure, and the actual application value is high.