Embedded steel bar corrosion rate monitoring sensor and method

A technology for monitoring the corrosion of sensors and steel bars, which is applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problems of being easily affected by the external environment, the sensor cannot monitor the temperature, and the high cost of the sensor, so as to achieve simple structure, low cost, and overcome interference Effect

Pending Publication Date: 2021-11-02
DESIGN INST NO 9 MINISTRY OF MECHINE BUILDING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Traditional steel bar corrosion generally uses pressure point sensors or optical fiber sensors. Such sensors are expensive and are easily affected by the external environment. Since the properties of steel bars have a certain relationship with their temperature, this type of sensor cannot detect temperature, the error is relatively large

Method used

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  • Embedded steel bar corrosion rate monitoring sensor and method
  • Embedded steel bar corrosion rate monitoring sensor and method

Examples

Experimental program
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Effect test

Embodiment 1

[0068] A pre-embedded steel bar corrosion rate monitoring sensor system includes a temperature sensor array, a resistivity sensor 2, a heating module 3, an ambient temperature detector and a monitoring host.

[0069] The steel bar is a plurality of steel bars located in the concrete in the concrete building, and the temperature sensor array is arranged on at least two steel bars; the temperature sensor 1 is attached to the surface of the steel bar, and the temperature sensor array includes a plurality of temperature sensors 1 arranged along the extension direction of the steel bar , and the distance between the temperature sensor 1 on the same steel bar is L, the distance L between a temperature sensor 1A and the temperature sensor 1B closest to itself on the same steel bar is equal to A, and the temperature sensor 1C closest to A on another steel bar the distance L;

[0070] The heating module 3 is arranged at both ends of a steel bar with a temperature sensor array, and the ...

Embodiment 2

[0079] A method using the monitoring sensor system in embodiment 1 to monitor steel bar corrosion rate, comprises the steps:

[0080] Step 1. System calibration;

[0081] Both the first steel bar and the second steel bar are provided with a temperature sensor array, and the two ends of the first steel bar are provided with a heating module 3, and the two ends of the second steel bar are provided with a resistivity sensor 2;

[0082] The monitoring host collects the temperature value of the ambient temperature detector, and the heating temperature of the heating module 3 is set to T+M according to the ambient temperature T; wherein M is the temperature difference between the ambient temperature and the heating temperature preset in the monitoring host;

[0083] Monitor the host and collect the temperature initial value T of the temperature sensor array at the same time 0ij and record, where T 0ij Indicates the initial temperature value of the jth temperature sensor 1 on the i...

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Abstract

The invention belongs to the technical field of engineering monitoring, and particularly relates to an embedded steel bar corrosion rate monitoring sensor and method. The sensor comprises a temperature sensor array, a resistivity sensor, a heating module, an environment temperature detector and a monitoring host. Under the combined action of a resistivity sensor and a temperature sensor, the heat conduction characteristic of the reinforcing steel bar and the change rule of the resistivity characteristic along with the temperature are monitored, when the corrosion rate reaches a certain degree, the resistivity characteristic changes along with the change of the temperature, and meanwhile due to the component change of the reinforcing steel bar, the heat conduction characteristic of the oxidized reinforcing steel bar also changes; and therefore, the corrosion rate of the reinforcing steel bar is monitored more accurately; and due to the ingenious design of the system, only the temperature sensor needs to be arranged on the surface of the steel bar, the structure is simple, stability is good, external interference can be better overcome compared with an optical fiber sensor, adaptability is high, and cost is lower.

Description

technical field [0001] The invention belongs to the technical field of engineering monitoring, in particular to a pre-embedded steel bar corrosion rate monitoring sensor and method. Background technique [0002] Steel corrosion has a great influence on the durability and safety of concrete structures. Reinforced concrete is the most widely used building material in contemporary civil engineering, water conservancy and road engineering. The corrosion of steel bars in reinforced concrete structures often endangers the safety of buildings, and the damage caused is difficult to repair and will cause huge losses. The durability of reinforced concrete structures caused by the corrosion of steel bars has attracted more and more attention from the engineering community. Therefore, it is necessary to monitor the corrosion of steel bars in concrete structures, find problems and deal with them in time to reduce the occurrence of accidents. [0003] Traditional steel bar corrosion ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00G01N27/04G01N25/20
CPCG01N17/006G01N27/041G01N25/20
Inventor 肖德文杨楠宋宇张萌赵保才
Owner DESIGN INST NO 9 MINISTRY OF MECHINE BUILDING
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