KR101792426B1 - System and apparatur for mornitoring degradation factor generating corrosion of steel embedded in concrete, and methof for mornitoring the same - Google Patents

Abstract

The present invention discloses a system and apparatus to monitor a deterioration factor corroding reinforced concrete that constitutes a building; and a method of monitoring a deterioration factor using the same. According to an embodiment of the present invention, a multi-channel sensor device comprises: a body made of a ferroelectric medium embedded in a reinforced concrete in one direction; a plurality of multi-channel sensors disposed on an outer surface of the body measuring resistance values; a monitoring module disposed on an outer surface of the body, monitoring a penetration state of the deterioration factor using the resistance values measured by the plurality of multi-channel sensors; and a communication module to wirelessly transmit monitoring data generated by the monitoring module to a corrosion management device.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a system and an apparatus for monitoring deterioration factors that corrode reinforced concrete, and a deterioration factor monitoring method for monitoring deterioration factors of deterioration factors that corrode reinforced concrete,

Embodiments of the present invention relate to a deterioration factor monitoring system and apparatus for monitoring deterioration factors that corrode reinforced concrete and wirelessly transmit the deterioration factors to the outside, and a deterioration factor monitoring method thereof.

Generally, reinforced concrete is composed of concrete that can withstand compression and reinforcing steel that is resistant to tension, and is widely used in large buildings and civil engineering structures.

Reinforcing bars used in reinforced concrete are normally not corroded because they form a passive protective coating in the concrete's strong alkaline environment. However, when the degradation factors such as chloride ion (Cl ^- ), carbon dioxide (CO ₂ ), sulfate ion (SO ₄ ^2- ) penetrate through cracks or micro voids in the reinforced concrete, the rebar can be corroded.

The deterioration factor permeates the inside of the reinforced concrete, and after a certain time of latency period, the reinforcing steel is corroded. When the reinforcing steel is corroded, the volume of the product due to corrosion is increased, and the pressure inside the reinforcing steel is increased to break the concrete surrounding the reinforcing steel .

Corrosion of reinforcing bars is accelerated because deterioration factors can reach the reinforcing bars more easily if concrete is broken. Thus, if cracks or rust were found on the surface of the concrete, it means that the corrosion of the reinforcing bars inside has progressed considerably. Therefore, it is necessary to predict and early detect corrosion of reinforced concrete by monitoring degradation factors in reinforced concrete. Particularly, prediction and early detection of corrosion of reinforced concrete can be important in that it can prevent the collapse of the building by establishing a repair and reinforcement plan of the building.

For this reason, studies are continuing to monitor degradation factors in reinforced concrete, and in particular, research is underway to monitor non-destructive methods that do not affect reinforced concrete.

In addition, when monitoring deterioration factors in reinforced concrete, it is necessary to transmit monitoring data to an external management apparatus to manage corrosion and durability of the building.

Japanese Patent No. 4688080, "Parts material and corrosion sensor unit connecting corrosion sensor, sheath tube and sheath tube" Korean Patent No. 0539380, "Deterioration Infiltration Monitoring System of Reinforced Concrete Structures" Japanese Patent No. 5204021, "Method of installing corrosion sensor unit and corrosion sensor"

It is an object of embodiments of the present invention to provide a system and an apparatus for monitoring a penetration state of a degradation factor in a reinforced concrete using a plurality of multi-channel sensors arranged to surround an outer surface of a body, .

It is an object of embodiments of the present invention to provide a wireless communication system and a wireless communication method capable of reducing the intensity of a radio signal and reducing a frequency band shift by wirelessly transmitting monitoring data according to a penetration state of a deterioration factor by disposing a communication module on a body made of a ferroelectric medium A deterioration factor monitoring system and apparatus, and a deterioration factor monitoring method thereof.

It is also an object of embodiments of the present invention to provide a deterioration factor monitoring system that can manage corrosion of a building and analyze the durability of the building using monitoring data collected from a plurality of multi-channel sensor devices.

A multi-channel sensor device for monitoring deterioration factors for corrosion of reinforcing concrete according to an embodiment includes a body made of a ferroelectric medium embedded in the reinforcing concrete in one direction, a plurality of A multi-channel sensor, a monitoring module disposed on an outer surface of the body, for monitoring a penetration state of the degradation factor using the resistance value measured from the plurality of multi-channel sensors, And a communication module for wirelessly transmitting the monitoring data generated by the monitoring module to the corrosion management device.

According to an embodiment, the deterioration factor may be at least one of chloride ion (Cl ^- ), carbon dioxide (CO ₂ ) and sulfate ion (SO ₄ ^2- ).

According to the embodiment, the monitoring module determines whether the deterioration factor is permeated into the reinforcing concrete using the resistance value, and when the deterioration factor penetrates into the reinforcing concrete, the penetration position and the penetration speed of the deterioration factor The penetration state of the degradation factor can be monitored.

According to an embodiment, the ferroelectric medium may be a quartz material.

According to the embodiment, the body has a columnar shape and can be buried at a distance of 2 cm from the reinforced concrete wall surface.

According to an embodiment of the present invention, the plurality of multi-channel sensors are disposed in a plurality of regions spaced apart from each other at a predetermined interval on the body, and are disposed to surround the outer surface of the body in each region, And a terminal for measuring a value.

According to an embodiment of the present invention, at least one multi-channel sensor disposed in the same area among the plurality of areas may be one sensor group that detects one sensor group that measures a resistance value for monitoring the degradation factor in the corresponding area have.

According to the embodiment, the monitoring module may calculate an average resistance value for each sensor group, and compare the average resistance value with a previously stored initial average resistance value to monitor whether or not the degradation factor is infiltrated.

According to an embodiment of the present invention, when the penetration of the deterioration factor is detected, the monitoring module measures a penetration position of the deterioration factor using an area where the corresponding sensor group is located in the body, The rate of penetration of the degradation factor can be measured based on the penetration time of the degradation factor.

According to an embodiment, the apparatus may further include a power supply module that supplies power to the plurality of multi-channel sensors, the monitoring module, and the communication module.

According to an embodiment, the power supply module may receive power wirelessly from an external power supply.

According to an embodiment, the power supply module may receive power through a power supply connector extending outside the reinforced concrete wall.

The deterioration factor monitoring system for corroding the reinforced concrete constituting the building according to the embodiment includes a plurality of multi-channel sensor devices that are embedded in various points in the reinforced concrete and generate monitoring data by monitoring the penetration state of the deterioration factor, And a corrosion management device for collecting the monitoring data from the plurality of multi-channel sensor devices to manage the corrosion state of the reinforced concrete and analyze the durability of the building, wherein the plurality of multi-channel sensor devices are embedded in the reinforced concrete And the monitoring data is wirelessly transmitted to the corrosion management device using a communication module disposed on the outer surface of the body made of ferroelectric medium.

According to an embodiment of the present invention, the plurality of multi-channel sensor devices are disposed in a plurality of regions spaced apart from each other at a predetermined interval on the body and the body, and arranged to surround the outer surface of the body in each region, A monitoring module for monitoring a penetration state of a deterioration factor in the reinforced concrete using a multi-channel sensor of the plurality of multi-channel sensors and the resistance value measured by the plurality of multi-channel sensors, and a monitoring module for monitoring data generated by the monitoring module, And the communication module for wireless transmission.

Meanwhile, the deterioration factor monitoring method for corroding the reinforced concrete constituting the building according to the embodiment includes the steps of measuring a resistance value using a plurality of multi-channel sensors disposed on an outer surface of a body made of a ferroelectric medium, Monitoring data of the deterioration factor by monitoring the penetration state of the degradation factor, and wirelessly transmitting the monitoring data to the corrosion management device.

According to embodiments of the present invention, a plurality of multi-channel sensors arranged to surround an outer surface of a body are used to precisely monitor penetration of a deterioration factor, penetration position, and penetration rate, which corrodes the reinforced concrete, Corrosion can be predicted and detected early.

In addition, according to embodiments of the present invention, by disposing a communication module on a body made of a ferroelectric medium and wirelessly transmitting the monitoring data, the intensity of the radio signal and frequency band shift can be reduced.

Also, according to embodiments of the present invention, the corrosion state can be managed using the monitoring data collected from a plurality of multi-channel sensor devices, and the durability of the building can be analyzed.

1 is a diagram illustrating a deterioration factor monitoring system according to an embodiment of the present invention.
FIG. 2A is a view showing a structure of the multi-channel sensor device shown in FIG. 1, and FIG. 2B is a diagram showing the configuration of a multi-channel sensor.
3 is a view showing a multi-channel sensor device according to another embodiment of the present invention.
FIG. 4 is a diagram illustrating an embedding mode and a degradation factor monitoring operation structure of a multi-channel sensor device according to an embodiment of the present invention.
5 is a view showing a concrete form of a multi-channel sensor device according to an embodiment of the present invention embedded in reinforced concrete.
6 is a view for explaining a deterioration factor monitoring method according to an embodiment of the present invention.
7 and 8 are graphs showing resistance values measured using a multi-channel sensor device according to an embodiment of the present invention.
9 is a graph showing the corrosion resistance of reinforced concrete according to the ratio of [Cl -] / [OH-].
10 is a graph showing chloride ion concentrations according to locations in reinforced concrete.
11 is a graph showing penetration time of a deterioration factor according to the position in the reinforced concrete.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, the scope of the rights is not limited or limited by these embodiments. Like reference symbols in the drawings denote like elements.

The terms used in the following description are chosen to be generic and universal in the art to which they are related, but other terms may exist depending on the development and / or change in technology, customs, preferences of the technician, and the like. Accordingly, the terminology used in the following description should not be construed as limiting the technical thought, but should be understood in the exemplary language used to describe the embodiments.

Also, in certain cases, there may be a term chosen arbitrarily by the applicant, in which case the detailed description of the meaning will be given in the corresponding description section. Therefore, the term used in the following description should be understood based on the meaning of the term, not the name of a simple term, and the contents throughout the specification.

On the other hand, the terms first, second, etc. may be used to describe various elements, but the elements are not limited by terms. Terms are used only for the purpose of distinguishing one component from another.

It is also to be understood that when a section such as a film, a layer, an area, a configuration request, etc. is referred to as being "on" or "on" another part, And the like are included.

1 is a diagram illustrating a deterioration factor monitoring system according to an embodiment of the present invention. The deterioration factor monitoring system shown in FIG. 1 monitors deterioration factors which are embedded in reinforced concrete constituting a building to corrode the reinforced concrete, manages the corrosion state of the reinforced concrete based on the monitoring data, and analyzes the durability of the building.

In general, the corrosion of reinforced concrete does not mean that the physical properties of the concrete deteriorate, but rather the corrosion of reinforcing bars inserted into the concrete.

It is obvious that most of these causes are due to the corrosion of reinforcing bars in concrete, after the actual reinforced concrete is installed, it ages and breaks after a certain period of time. Therefore, measuring the corrosion degree of concrete means measuring the corrosion degree of the reinforcing bars inserted in the inside thereof.

Generally, under normal conditions, corrosion of reinforcing bars in concrete does not occur well. Hydrolysis occurs in the cement constituting the concrete, and about 30% of the used cement is converted to Ca (OH) _2, and the reinforcing bar completely surrounded by the uncontaminated cement is present in a strong alkaline atmosphere of pH 12 or more. in this case. The iron oxide film on the surface of the reinforcing steel in the concrete is very thin. Even if it is a thin film, the electrode potential on the surface of the reinforcing steel can be largely changed to prevent the corrosion.

However, chloride (Cl ^- ) or sulfate (SO ₄ ^2- ) exists in the concrete due to the inherent salt and foreign salt, or the calcium hydroxide in the concrete micropores reacts with the carbon dioxide (CO ₂ ) When the alkalinity is lowered, neutralization or carbonation occurs, and the passive film of the above-mentioned iron +3 is destroyed and the steel bar is corroded. Thus, deterioration factors such as chloride ion (Cl ^- ), carbon dioxide (CO ₂ ), sulfate ion (SO ₄ ^2- ) penetrate the reinforced concrete and pass through the latent period until the passive film is destroyed. Therefore, it is important to monitor deterioration factors to predict and early detect corrosion before the corrosion of reinforced concrete proceeds considerably.

In this embodiment, the deterioration factor in the reinforced concrete can be monitored by using the multi-channel sensor device 100. Specifically, the multi-channel sensor device 100 can monitor the penetration state of the deterioration factor including whether the deterioration factor has penetrated into the reinforced concrete, where the deterioration factor has penetrated, and at what speed the impregnation has occurred have.

It is also necessary to transmit monitoring data on the penetration state of the deterioration factor to the corrosion management apparatus existing outside the reinforced concrete or outside the building in order to judge the necessity of repair and reinforcement work according to the corrosion state.

Conventional monitoring data transmission technologies transmit monitoring data using a separate antenna or AP (Access Point) provided in the sensor device. However, the separate antenna must be exposed through the reinforced concrete wall for wireless signal transmission, the signal strength degradation and frequency band shift due to the reinforced concrete occur, and the AP requires inner wall wiring.

Therefore, it is necessary to accurately grasp the penetration state of deterioration factor in reinforced concrete, and to monitor the deterioration factor in a form that facilitates wireless transmission of monitoring data.

Referring to FIG. 1, the deterioration factor monitoring system includes a plurality of multi-channel sensor devices 101, 102, and 103, a first corrosion management device 210, and a second corrosion management device 220.

The plurality of multi-channel sensor devices 101, 102 and 103 are embedded in different points 10, 20 and 30 in the same building to monitor the penetration state of deterioration factor at each point 10, have.

The plurality of multi-channel sensor devices 101, 102, and 103 wirelessly transmit the monitoring data to the first corrosion management device 210 or the second corrosion management device 220 using a body made of a ferroelectric medium embedded in the reinforced concrete .

At this time, in order to stably transmit and receive the monitoring data, the plurality of multi-channel sensor devices 101, 102, and 103 may be buried within a distance of 2 cm from the reinforced concrete wall surface. According to this structure, the plurality of multi-channel sensor devices 101, 102, and 103 do not need to expose the device to the reinforced concrete wall, and wireless communication can be performed without a separate antenna by using a body made of a ferroelectric medium. The configuration and operation of the plurality of multi-channel sensor devices 101, 102, and 103 related thereto will be described in detail with reference to FIG. 2 and FIG.

The first corrosion management device 210 and the second corrosion management device 220 collect monitoring data from a plurality of the multi-channel sensor devices 101, 102 and 103 and detect deterioration at each point 10, It is possible to manage the infiltration state of the factor and analyze the corrosion state and the durability of the building from the infiltration state of the deterioration factor.

Here, the first corrosion management device 210 is a mobile device, and may be a smart phone owned by an individual or a device for measuring corrosion state. Also, the second corrosion management device 220 may be a server, a management office of a building, or a server operated by a government agency or a private institution that intensively manages the corrosion state.

The first corrosion management device 210 may directly use the monitoring data when the monitoring data including the penetration state of the deterioration factor is received, but may also transmit the monitoring data to the second corrosion management device 220.

The first corrosion management device 210 or the second corrosion management device 220 may analyze the corrosion state of the reinforced concrete and analyze the durability of the building based on the monitoring data, when the monitoring data is collected. The monitoring data includes the penetration position of the deterioration factor in the reinforced concrete and the penetration rate of the deterioration factor, and the step of the corrosion state of the reinforced concrete can be calculated using the penetration position and the penetration rate.

For example, the first corrosion management device 210 or the second corrosion management device 220 may be configured as a "top, middle, low" or "high, low" or "5, 4, 3, 2, 1" By analyzing the corrosion state of the concrete, it is possible to notify the landlord or manager, and it can guide the need for maintenance and reinforcement.

The first corrosion management device 210 can evaluate the durability grade of the building in consideration of the corrosion state depending on the construction year or the number of years of the building. It is desirable that the durability of the building be based on the evaluation method according to the building law or the evaluation method established by the facility safety management agency.

In addition, the first corrosion management device 210 or the second corrosion management device 220 can evaluate the life of the building based on the analyzed corrosion state and the durability of the building, thereby providing a rebuilding period or an accident such as a building collapse It can be induced to cope with the advance.

FIG. 2A is a view showing a structure of the multi-channel sensor device shown in FIG. 1, and FIG. 2B is a diagram showing the configuration of a multi-channel sensor. The multichannel sensor device 100 shown in FIG. 2A includes a body 110, a plurality of multi-channel sensors 120 and a measurement module 130, a power supply module 140, and a communication module 150 do.

The body 110 is embedded in the reinforced concrete and is made of a ferroelectric medium. The ferroelectric medium may be, but is not limited to, a quartz material.

In addition, the body 110 may have a square columnar shape or a cylindrical shape. The body 110 may have various shapes of polygonal columns, but it is preferable that the body 110 is a square column so as to be easily embedded in the reinforced concrete.

The plurality of multi-channel sensors 120 include terminals for measuring a resistance value for monitoring degradation factors that corrode the reinforced concrete. The plurality of multi-channel sensors 120 are disposed in a plurality of regions spaced apart at regular intervals on the body 110, and at least one is disposed to surround the outer surface of the body 110 in each region.

Referring to FIG. 2A, the first to third regions 121, 122, and 123 are spaced apart from each other on the body 110.

At least one multi-channel sensor may be disposed to surround the outer surface of the body 110 in the first to third regions 121, 122, 123. As shown in FIG. 2, when the body 110 is a cylinder, two multi-channel sensors 120 surrounding the outer surfaces of the first to third regions 121, 122 and 123 are disposed in the body 110 .

Also, at least one multi-channel sensor disposed in the same one of the first to third regions 121, 122, and 123 may be one sensor group for measuring a resistance value according to a deterioration factor in the corresponding region.

More specifically, the two multi-channel sensors 120 disposed in the first region 121 may be a first sensor group for measuring a resistance value according to deterioration factors in the first region 121. Likewise, the two multi-channel sensors 120 disposed in the second region 122 may be a second sensor group for measuring a resistance value according to a deterioration factor in the second region 122, The two multi-channel sensors 120 disposed in the region 123 may be a third sensor group that measures a resistance value according to a deterioration factor in the third region.

Hereinafter, the structure of the multi-channel sensor 120 will be described in detail with reference to FIG. 2B. The multi-channel sensor 120 according to the present invention includes a plurality of channels 120a and two terminals 120b capable of measuring resistance values of the channels 120a.

The multi-channel sensor 120 is fabricated by depositing a metal thin film made of iron (Fe) on a PET (polyester) substrate and then patterning it. Here, the metal thin film has a thickness of 500 nm, and it is possible to measure a resistance value change due to infiltration of a smaller amount of chloride ion (Cl-), carbon dioxide (CO ₂ ), sulfate ion (SO ₄ ^2- ) .

The multi-channel sensor 120 may be about 3 cm in length and about 3 cm in width. However, the size of the multi-channel sensor 120 is not limited thereto and may be smaller or larger than 3 cm. However, it is preferable that the ratio of length to width of the multi-channel sensor 120 is 100 or less.

When the deterioration factor penetrates into the reinforced concrete, the resistance value of the multi-channel sensor 120 changes, so that the resistance value changes.

The multi-channel sensor 120 is connected to each of the two terminals 120b by a wire line (not shown), and the wire line can transmit a resistance value to the monitoring module 130 measured at the two terminals 120b.

In order to prevent the multi-channel sensor 120 from being damaged, the multi-channel sensor 120 may be sealed with an anion exchange membrane 125 or other protective film.

The monitoring module 130 is disposed on the outer surface of the body 110 and receives a resistance value through a wire 124 connected to a terminal 120b included in the plurality of multi-channel sensors 120. [ The monitoring module 130 monitors the penetration state of the deterioration factor in the reinforced concrete using the resistance value, and generates monitoring data. Here, the penetration state includes the penetration of the deterioration factor, the penetration position of the deterioration factor, and the penetration rate of the deterioration factor.

The monitoring module 130 may identify each sensor group of the plurality of multi-channel sensors 120 and calculate an average resistance value of the multi-channel sensors 120 included in each sensor group. The initial average resistance value stored in the monitoring module 130 and the average resistance value of each sensor group may be compared to determine whether the degradation factor in the reinforced concrete is permeated. Here, the initial average resistance value is a value obtained by measuring an average resistance value of the multi-channel sensors 120 included in each sensor group in a state in which the multi-channel sensor device 100 is not affected by deterioration factors at all .

For example, if the average resistance value of the two multi-channel sensors 120 included in the first sensor group is greater than the initial average resistance value, the monitoring module 130 may determine that the deterioration factor has penetrated into the first sensor group It can be judged. At this time, the larger the difference from the initial average resistance value, the greater the penetration (or penetration concentration) of deterioration factor. For reference, the penetration degree (or penetration concentration) can be quantified by the difference between the measured average resistance value and the initial average resistance value.

The monitoring module 130 measures the penetration position of the degradation factor using the region where the corresponding sensor group is located in the body 110 when the deterioration factor penetration is detected in at least one of the sensor groups can do.

For example, the average resistance value of the first sensor group disposed in the first region 121 is different from the initial average resistance value, and the second and third sensor groups disposed in the second and third regions 122, The monitoring module 130 may detect that the deterioration factor has penetrated into the first region 121. In this case, That is, the penetration position of the deterioration factor can be measured in the first region 121.

When the penetration position of the degradation factor is measured in at least one of the sensor groups of the sensor groups, the monitoring module 130 can measure the penetration rate of the degradation factor based on the penetration time of the degradation factor for each penetration position of the degradation factor have.

For example, when the penetration position of the deterioration factor is the second region and the time taken for the deterioration factor to penetrate to the second region (i.e., the time required for penetration) is 30 days, the length to the second region, The penetration rate of the degradation factor can be measured using time.

The monitoring module 130 may generate the monitoring data by measuring the penetration position and penetration rate of the degradation factor in the above-described manner. The monitoring data may include identification information of the multi-channel sensor device 100, identification information and location information of a building in which the multi-channel sensor device 100 is embedded, penetration positions of deterioration factors, and penetration rates.

The power supply module 140 supplies power to the plurality of multi-channel sensors 120, the monitoring module 130, and the communication module 140. The power supply module 140 may be connected to the plurality of multi-channel sensors 120, the monitoring module 130, and the communication module 140 through a power supply line.

The power supply module 140 can receive power wirelessly from an external power supply device that is located outside the reinforced concrete wall and supplies power wirelessly. Alternatively, the power supply module 140 may receive power through a power supply connector extending outside of the reinforced concrete wall surface.

The communication module 150 is disposed on the outer surface of the body 110 and wirelessly transmits the monitoring data generated by the monitoring module 130 to the first or second corrosion management apparatuses 210 and 220. The communication module 150 may be a module capable of short-range wireless communication such as Bluetooth or Wi-Fi.

The monitoring data output from the communication module 150 is converted into a wireless signal and output. In this embodiment, since the body 110 is made of a ferroelectric material through which a radio signal passes and is buried within a distance of 2 cm from the wall surface of the reinforced concrete, the strength of the signal due to the thickness of the ferroelectric body 110 or the thickness of the reinforced concrete wall, The shift can be minimized. Accordingly, it is possible to integrate the communication module 150 and the body 110 structure for monitoring the penetration state of the deterioration factor without the need for a separate antenna or inner wall wiring for wireless signal transmission.

3 is a view showing a multi-channel sensor device according to another embodiment of the present invention. The multi-channel sensor device 300 shown in FIG. 3 includes a cylindrical body 310, a plurality of multi-channel sensors 320 disposed on an outer surface of the body 310, a monitoring module 330, A power supply module 340 and a communication module 350.

The multichannel sensor device 300 includes a multichannel sensor 320, a monitoring module 330, a power supply module 340, and a communication module 340, which differ only in the shape of the device 100 and the body 310 shown in FIG. (350) are the same, so a detailed description thereof will be omitted.

The body 310 is made of a ferroelectric medium such as quartz, and may have a quadrangular prism shape.

The first to fourth regions 320a, 320b, 320c, and 320d are spaced apart from each other at regular intervals on the body 310. The first to fourth regions 320a, 320b, 320c, A multi-channel sensor 320 may be disposed.

The four multi-channel sensors 320 disposed in the first region 320a are the first sensor group for monitoring the penetration state of the deterioration factor in the first region 220a, The multi-channel sensors 320 may be a second sensor group for monitoring the penetration state of deterioration factors in the second region 320a.

In addition, the four multi-channel sensors 320 disposed in the third region 320c become the third sensor group for monitoring the penetration state of the deterioration factor in the third region 320c, and are disposed in the fourth region 320d The four multi-channel sensors 320 may be a fourth sensor group for monitoring the penetration state of the degradation factor in the fourth region 320d.

The monitoring module 330 monitors the penetration state of the deterioration factor in the reinforced concrete using the resistance values measured by the plurality of multi-channel sensors 320, and generates monitoring data.

The power supply module 340 provides power to the plurality of multi-channel sensors 320, the monitoring module 330 and the communication module 340.

The communication module 350 wirelessly transmits the monitoring data generated by the monitoring module 130 to the external management device.

The multi-channel sensor device 300 shown in FIG. 3 is also embedded within the distance of 2 cm from the wall of the reinforced concrete to monitor the penetration state of the deterioration factor, and the structure of the body 310 and the communication module 350 are integrated .

FIG. 4 is a diagram illustrating a structure of a multi-channel sensor device according to an exemplary embodiment of the present invention. Referring to FIG. 4, the multi-channel sensor device 400 shown in FIG. 3 is embedded in the concrete with the reinforcing bars 410 attached thereto. Here, the multi-channel sensor device 400 may be buried at a distance of 2 cm from the reinforced concrete wall 420 in order to stably transmit and receive monitoring data.

Thus, when the multi-channel sensor device 300 wirelessly transmits the monitoring data, the first corrosion management device 210, such as a mobile device, can receive it, and the first corrosion management device 210 can receive the monitoring data, (220).

The multi-channel sensor device 300 may receive power wirelessly through the power supply 230 to supply power to the internal components.

5 is a view showing a concrete form of a multi-channel sensor device according to an embodiment of the present invention embedded in reinforced concrete. The multi-channel sensor device 300 shown in FIG. 5 may be embedded in the reinforced concrete as shown in FIG. However, the multi-channel sensor device 300 may receive power through the power supply connector 360 extended to the outside of the reinforced concrete wall 420.

6 is a view for explaining a deterioration factor monitoring method according to an embodiment of the present invention. Referring to FIG. 6, a deterioration factor monitoring method measures a resistance value using a plurality of multi-channel sensors disposed on an outer surface of a body made of a ferroelectric medium (operation 610).

Thereafter, the method monitors data of penetration of deterioration factor using the measured resistance value to generate monitoring data (operation 620). Then, the monitoring data is wirelessly transmitted to the corrosion management apparatus (step 630). At this time, by using the communication module disposed on the body made of the ferroelectric material, the monitoring data can be wirelessly transmitted by minimizing the signal strength degradation and frequency band shift due to the thickness of the body or the reinforced concrete wall.

7 to 8 are graphs illustrating resistance values of a multi-channel sensor device according to an embodiment of the present invention.

FIG. 7 is a graph showing a change in resistance (R / R ₀ ) of a multi-channel sensor device according to time with different salt concentration (NaCl) in a pH 7 environment. Here, a multi-channel sensor is used, which includes a first multi-channel sensor device including a sensor not sealed by a protective film, and a second multi-channel sensor device including a sensor sealed by a protective film.

First, the resistance change (R / R ₀ ) of the first multichannel sensor device was examined. The first multichannel sensor device showed a resistance change (R / R ₀ ) of more than 100 within 6 hours in 0.3M NaCl, 0.6M NaCl, R ₀ ). Specifically, the first multi-channel sensor arrangement indicates the resistance (R / R ₀₎ 600 or more within 8 hours eseo 0.6M NaCl, 0.9M NaCl in represents an (R / R ₀₎ over 600 resistance change within 6 hours. Thus, the first multi-channel sensor device is influenced by the salt concentration in the resistance measurement, which means that the sensor may be damaged due to factors such as salinity or the accuracy of the sensor may be deteriorated when the sensor is not sealed with a protective film.

On the other hand, as for the resistance change (R / R ₀ ) of the second multi-channel sensor device, the second multi-channel sensor device exhibited a resistance change of less than 100 after 8 hours in 0.3M NaCl, 0.6M NaCl and 0.9M NaCl / R ₀ ). In particular, the second multichannel sensor device exhibits a resistance change (R / R ₀ ) of less than 100 even after 12 hours at 0.3 M NaCl, exhibiting a significantly lower resistance change (R / R ₀ ) . This means that the sensor included in the second multi-channel sensor device is sealed by the protective film to prevent damage due to salinity, thereby improving the sensor accuracy.

FIG. 8 is a graph showing a change in resistance (R / R ₀ ) of a multi-channel sensor device with different salt concentrations (NaCl) in a pH 12 environment. Here, the multi-channel sensor includes a sensor sealed by a protective film.

FIG. 8 is a graph showing changes in resistance (R / R) of a multi-channel sensor device over time with a salt concentration of 0, 0.15 M NaCl, 0.3 M NaCl, 0.45 M NaCl, 0.6 M NaCl, 0.75 M NaCl, ₀ ).

The multi-channel sensor device exhibits a resistance change (R / R ₀ ) of less than 5 even after 50 hours at 0, 0.15M NaCl, 0.3M NaCl and 0.45M NaCl. In addition, the resistance change (R / R ₀ ) was increased after 50 hours in 0.6M NaCl, 0.75M NaCl and 0.9M NaCl, but the value was around 10. It can be seen from FIG. 7 that even though the other conditions are the same but the resistance change (R / R ₀ ) of the second multichannel sensor device measured by different pH environments is significantly low.

The reason why the resistance change (R / R ₀ ) of the multi-channel sensor device is relatively small in FIG. 8 is that the corrosion of the multi-channel sensor device is prevented by forming the iron oxide film on the strong alkaline environment of pH 12 . However, if the alkalinity around the channel sensor device drops over time, the iron oxide film may be destroyed and the resistance change due to the salt may appear.

9 is a graph showing the rate of corrosion of a reinforced concrete according to the ratio of [Cl ^- ] / [OH ^- ]. The [Cl ^- ] / [OH ^- ] ratio of the solution containing NaCl in the voids was adjusted from 0 to 0.15, 0.3, 0.45, 0.6, 0.75, and 0.9. Reinforced concrete corrosion was measured after immersing the reinforced concrete in this solution.

Referring to FIG. 9, as the [Cl ^- ] / [OH ^- ] ratio increases, the corrosion resistance of the reinforced concrete increases. The increase in the ratio of [Cl ^- ] / [OH ^- ] affects the corrosion of the reinforced concrete Able to know.

10 is a graph showing chloride ion concentrations according to distances in reinforced concrete. Specifically, FIG. 10 is a graph of chloride ion concentration measured in units of distance of 10 mm from a reinforced concrete wall surface at 10 days, 20 days, 50 days, and 100 days after a multi-channel sensor device is installed.

Referring to FIG. 10, chloride ion concentrations of about 0.1 to 1.4 were measured within a distance of 10 mm from the reinforced concrete wall surface (i.e., the outer wall of the building), and chloride ions were not measured at the distance of 15 to 50 mm . That is, when 10 days have elapsed, it can be seen that the chloride ion penetrated into about 10 mm.

On the other hand, when 20 days passed, chloride concentrations of about 0.1 to 1.4 were measured within a distance of 20 mm from the reinforced concrete wall, and chloride ions were not measured at a distance of 20 to 50 mm.

Also, when 50 days have elapsed, chloride ion concentrations of about 0.1 to 1.4 were measured within a distance of 30 mm from the reinforced concrete wall, and chloride ions were not measured at a distance of 30 to 50 mm.

When 100 days have elapsed, chloride ion concentrations of about 0.1 to 1.5 were measured within a distance of 40 mm from the reinforced concrete wall, and chloride ions were not measured at distances of 40 to 50 mm.

As shown in FIG. 10, the chloride ion penetrates deep into the reinforced concrete wall with time, and the chloride ion concentration at each distance is measured with the lapse of time. As the chloride ion penetrates deeper into the wall of the reinforced concrete wall, the probability of corrosion increases. Therefore, it is necessary to predict the corrosion of the reinforced concrete by monitoring chloride ions at various distances (or positions) .

11 is a graph showing penetration time of a deterioration factor according to the position in the reinforced concrete. 11 is a cross-sectional view of a multichannel sensor 100 disposed in four regions (x ₁ , x ₂ , x ₃ , x ₄ ) of the multi-channel sensor device 100 after the multi-channel sensor device 100 is installed in the reinforced concrete (T ₁ , t ₂ , t ₃ , t ₄ ) at which the signal (resistance change signal) is measured, and represents the penetration rate of the deterioration factor.

Here, the four regions (x ₁ , x ₂ , x ₃ , x ₄ ) may be the penetration distance of the degradation factor, and the time (t ₁ , t ₂ , t ₃ , t ₄ ) It may be the time required for the deterioration factor to penetrate into the region. If, in the building when if the furthest x ₄ where the deterioration factors penetrate in from the reinforced concrete wall (i.e., the outer wall of the building), since the corrosion of the building may already be in progress, the deterioration factors penetrate x ₁ position compensation and Monitoring data can be wirelessly transmitted to an external corrosion management device to establish a reinforcement plan.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the claims.

100: Multi-channel sensor device
110: Body
120: Multi-channel sensor
130: Monitoring module
140: power supply module
150: Communication module

Claims (13)

A multi-channel sensor device for monitoring degradation factors that corrode reinforced concrete,
A body embedded in the reinforcing concrete in one direction and made of a ferroelectric medium;
A plurality of multi-channel sensors disposed in a plurality of regions of the outer surface of the body to measure resistance values;
A monitoring module disposed on an outer surface of the body and monitoring a penetration state of the degradation factor using the resistance value measured from the plurality of multi-channel sensors; And
And a communication module disposed on an outer surface of the body and wirelessly transmitting the monitoring data generated by the monitoring module to the corrosion management device,
Wherein the monitoring module detects a deterioration factor of the deterioration factor based on a region where the at least one multi-channel sensor is located among the plurality of regions when the penetration state of the deterioration factor is detected by at least one of the plurality of multi- Measuring at least one penetration position related to the factor and measuring the penetration rate of the degradation factor using the penetration time of the deterioration factor for each of the at least one penetration position,
Wherein the plurality of multi-
A first sensor group arranged to surround a first region of the plurality of regions and measuring a resistance value according to the deterioration factor in the first region;
A second sensor group arranged to surround a second region of the plurality of regions and measuring a resistance value according to the deterioration factor in the second region; And
And a third sensor group arranged to surround a third region of the plurality of regions and measuring a resistance value according to the deterioration factor in the third region,
The monitoring module measures the penetration velocity using the distance between any one of the first region, the second region, and the third region on the body, and the penetration time
Multi-channel sensor device. The method according to claim 1,
The deterioration factor,
Chloride ion (Cl ^-), carbon dioxide (CO ₂₎ and sulfate ions (SO ₄ ^2-), at least one of the multi-channel sensor unit of. The method according to claim 1,
Wherein the ferroelectric medium is a quartz material. The method according to claim 1,
The body
And has a columnar shape,
And embedded within a distance of 2 cm from the reinforced concrete wall surface. The method according to claim 1,
Wherein the plurality of multi-
And a terminal disposed in a plurality of regions spaced apart from each other at a predetermined interval on the body and arranged to surround the outer surface of the body in each region and to measure a resistance value for monitoring the penetration state of the deterioration factor. Multi-channel sensor device. 6. The method of claim 5,
The monitoring module includes:
And calculates an average resistance value for each sensor group, and compares the average resistance value with a pre-stored initial average resistance value to monitor whether the deterioration factor is infiltrated or not. delete The method according to claim 1,
A plurality of multi-channel sensors, a monitoring module, and a power supply module
Further comprising: 9. The method of claim 8,
The power supply module includes:
And receives power wirelessly from an external power supply. 9. The method of claim 8,
The power supply module includes:
And receives power through a power supply connector extending outwardly of the reinforced concrete wall surface. A deterioration factor monitoring system for corroding reinforced concrete constituting a building,
A plurality of multi-channel sensor devices embedded in various points in the reinforced concrete to generate monitoring data by monitoring penetration of the degradation factors; And
A corrosion management device for collecting the monitoring data from the plurality of multi-channel sensor devices to manage the corrosion state of the reinforced concrete and analyze the durability of the building;
/ RTI >
Wherein the plurality of multi-channel sensor devices comprise:
The monitoring data is wirelessly transmitted to the corrosion management device using a communication module disposed on an outer surface of a body made of a ferroelectric medium embedded in the reinforced concrete,
A plurality of multi-channel sensors disposed in a plurality of regions spaced apart from each other at a predetermined interval on the body and arranged to surround the outer surface of the body in each region,
And a monitoring module for monitoring a penetration state of deterioration factors in the reinforced concrete using the resistance values measured by the plurality of multi-channel sensors,
Wherein the monitoring module detects a deterioration factor of the deterioration factor based on a region where the at least one multi-channel sensor is located among the plurality of regions when the penetration state of the deterioration factor is detected by at least one of the plurality of multi- Measuring at least one penetration position related to the factor and measuring the penetration rate of the degradation factor using the penetration time of the deterioration factor for each of the at least one penetration position,
Wherein the plurality of multi-
A first sensor group arranged to surround a first region of the plurality of regions and measuring a resistance value according to the deterioration factor in the first region;
A second sensor group arranged to surround a second region of the plurality of regions and measuring a resistance value according to the deterioration factor in the second region; And
And a third sensor group arranged to surround a third region of the plurality of regions and measuring a resistance value according to the deterioration factor in the third region,
The monitoring module measures the penetration velocity using the distance between any one of the first region, the second region, and the third region on the body, and the penetration time
Deterioration factor monitoring system. 12. The method of claim 11,
Wherein the plurality of multi-channel sensor devices comprise:
The body; And
And a communication module that wirelessly transmits the monitoring data generated by the monitoring module to the corrosion management device
/ RTI > A deterioration factor monitoring method for corroding reinforced concrete constituting a building,
Measuring a resistance value using a plurality of multi-channel sensors disposed in a plurality of regions of an outer surface of a body made of a ferroelectric medium;
Monitoring data of the deterioration factor using the measured resistance value to generate monitoring data; And
And wirelessly transmitting the monitoring data to the corrosion management apparatus,
Wherein the generating the monitoring data comprises:
And at least one of the plurality of regions, which is related to the degradation factor, based on a region where the at least one multi-channel sensor is located, when the penetration state of the deterioration factor is detected by at least one of the plurality of multi- Measuring one penetration position; And
Measuring the permeation rate of the degradation factor using the penetration time of the degradation factor for at least one of the penetration positions,
Measuring a resistance value using a plurality of multi-channel sensors comprises:
Disposing at least two or more multi-channel sensors as a first sensor group so as to surround a first one of the plurality of regions;
Disposing at least two or more multi-channel sensors as a second sensor group so as to surround a second one of the plurality of regions; And
And disposing at least two or more multi-channel sensors as a third sensor group so as to surround a third one of the plurality of regions,
The step of measuring the rate of penetration of the degradation factor comprises:
Measuring the penetration velocity using the distance between any one of the first region, the second region, and the third region on the body and the other one and the penetration time;
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