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Steel bar corrosion rate intelligent detection device

A technology for intelligent detection and steel corrosion, which is applied in measuring devices, optical testing for flaws/defects, image enhancement, etc. It can solve the difficulties in standardizing the production of sleeves, the reliability of heating wires, and the production of strip thermal imagers. and other problems, to achieve the effect of realizing intelligent rapid measurement, avoiding irregular operation behavior, and fast measurement speed

Pending Publication Date: 2021-12-03
GUANGDONG PROVINCIAL ACAD OF BUILDING RES GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese invention patent CN104964918B, in the invention titled "A Measuring Device and Method for Measuring the Corrosion Rate of Steel Bars", discloses a device that uses buoyancy to measure the non-uniform corrosion rate of steel bars. The relationship of the relationship is mapped to the corrosion rate curve of the steel bar in the length direction, which provides a way to measure the non-uniform corrosion of the steel bar. However, after the steel bar is corroded, the expansion and contraction of the surface will lead to a non-uniform rise in the liquid level. Therefore, the patent’s The measurement accuracy is not high, and the device is bulky, and the uncorroded steel bar of the same type needs to be measured in the same way before the measurement, which causes inconvenience in use
In response to the above problems, the Chinese invention patent CN107389731B, the invention patent titled "A Portable Measuring Device and Method for Measuring the Corrosion Rate of Steel Bars", measures the non-uniform corrosion by heating the steel bar and observing the temperature change rate in the length direction of the steel bar. , this kind of equipment has been miniaturized, but it is difficult to standardize the production of the heating sleeve for winding steel bars, and it is difficult to guarantee the reliability of the heating wire. It is also difficult to manufacture the strip thermal imager mentioned in the patent. Therefore, the Patents still have problems in terms of user experience and reliability
[0006] In summary, the steel corrosion rate measurement equipment has great research significance and economic value, but the existing measurement methods have many shortcomings such as cumbersome measurement process, poor user experience, long detection time, etc.

Method used

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  • Steel bar corrosion rate intelligent detection device
  • Steel bar corrosion rate intelligent detection device
  • Steel bar corrosion rate intelligent detection device

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Effect test

Embodiment 1

[0056] Such as figure 1 with figure 2 As shown, the present invention discloses an intelligent detection device for the corrosion rate of steel bars, including: a camera 4 and a corrosion detection host, wherein the corrosion detection host stores the cross-sectional corrosion pixels of steel bars trained by the classification convolutional neural network Determining the network model; and, the corrosion cross section of the measured steel bar that needs to be measured is placed within the shooting range of the camera 4;

[0057] Such as image 3 As shown, the rust detection host can communicate with the camera 4, and measure the steel bar under test in the following manner:

[0058] Step S1, the operator controls the camera 4 to take a sampling image through the rust detection host, so that the rust detection host can automatically judge whether the shooting angle of the sampling image meets the qualification condition; wherein, the qualification condition is : The perpen...

Embodiment approach

[0067] Such as Figure 4 with Figure 5 As shown, the intelligent detection equipment for steel bar corrosion rate also includes a calibration device provided with a target plane 1, three saddle circles 2 are arranged on the target plane 1, and the saddle points of the three saddle circles 2 are in the form of an isosceles right triangle Distribution, the saddle point at the right angle position is marked as the reference saddle point A, and the other two saddle points are marked as the second saddle point B and the third saddle point C, wherein the saddle circle 2 is a circle pattern whose interior is divided into four equal parts, and the The four equal parts are alternately filled with two different colors clockwise, and the saddle point is the center of the saddle circle 2; see Figure 5 , the four equal parts are preferably filled with black and white;

[0068] Moreover, the calibration device is relatively fixed to the steel bar under test, and the target plane 1 is copl...

Embodiment 3

[0092] On the basis of the above-mentioned embodiment 1 or embodiment 2, this embodiment 3 also adopts the following preferred implementation modes:

[0093] The network model for determining the rusted pixels of the steel bar cross section is obtained by training the classification convolutional neural network with the model training data set;

[0094] Wherein, the model training data set includes a sufficient number of data groups, and each group of the data groups includes one of the qualified captured images, the classification and marking data of the qualified captured images obtained by manual marking, and obtained through actual measurement. The rusted pixel area of ​​the qualified captured image (for example: Figure 7 The total pixel area of ​​all the solid boxes in the box is the rusted pixel area), the classification mark data includes the classification mark of each pixel in the qualified captured image, and the classification mark is divided into two types: 1 and ...

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Abstract

The invention discloses a steel bar corrosion rate intelligent detection device, which comprises a camera and a corrosion detection host, and is characterized in that the corrosion detection host stores a steel bar cross section corrosion pixel determination network model obtained by training a classification convolutional neural network; the corrosion cross section, needing to be measured, of the steel bar to be measured is arranged in the shooting range of the camera; and the corrosion detection host can communicate with the camera, and is used for detecting the detected reinforcing steel bar according to the modes from the step S1 to the step S4. According to the invention, the corrosion rate of the steel bar to be measured at the corrosion cross section can be measured, rapid measurement of the non-uniform corrosion rate of the steel bar is realized, tedious operations such as pickling, heating, water injection and the like are not needed, the measurement result of the corrosion rate can be obtained on site, and the method has the advantages of high measurement speed, high measurement precision, simple and convenient operation, high reliability and high intelligent degree.

Description

technical field [0001] The invention relates to a measuring device for the corrosion rate of steel bars, in particular to an intelligent detection device for the corrosion rate of steel bars. Background technique [0002] Reinforced concrete structure effectively utilizes the properties of both steel and concrete. It has many advantages such as easy material acquisition, high plasticity, and strong fire resistance. It is the most widely used building material in civil engineering. Behind the many advantages of reinforced concrete structures, its structural durability is the key indicator of engineers and scientific researchers. For coastal areas, the corrosion of steel bars inside concrete structures is the main factor affecting the durability of concrete structures. [0003] Corrosion of reinforcement inside the concrete will lead to rust swelling and cracking of the concrete protective layer, which will reduce the service performance of the building structure and bring hu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/88G01B11/28G06T7/62G06K9/62G06N3/04G06N3/08
CPCG01N21/8851G01B11/28G06T7/62G06N3/08G06T2207/20081G06T2207/30136G06N3/045G06F18/241
Inventor 张凯过民龙杨厚易
Owner GUANGDONG PROVINCIAL ACAD OF BUILDING RES GRP CO LTD
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