KR102023553B1 - Corrosion monitoring system - Google Patents

Abstract

The present invention relates to a pier corrosion inspection system. More specifically, the pier corrosion inspection system includes: an electrode part formed with an anodic zinc-based mesh electrically connected with a cathodic rebar; a switch part electrically connected to deliver a current value delivered through the electrode part to a relay part when the measurement of the current value is required; the relay part delivering the current value to a terminal of a control unit only when receiving a current from a remote controller; the control unit receiving the current from the terminal and converting an analogue signal of the current into a digital signal, and then, calculating the digital signal as a current value to deliver the value to a main part to determine whether maintenance work is necessary or not based on the lifespan of the rebar and the consumption of the zinc-based mesh, which are calculated through an algorithm inputted through the terminal; a power self-generation part supplying self-generated power to the control unit; an alarm unit emitting an LED alarm signal by comparing the consumption and current value to a reference value through the terminal of the control unit; and an input header inputting instructions, including the algorithm for calculating the digital signal as a current value and an algorithm for determining the necessity of maintenance work when the consumption of the zinc-based mesh is equal to or greater than a predetermined value and the lifespan of the rebar is exceeded, into the control unit through the terminal of the control unit. Therefore, the pier corrosion inspection system is capable of effectively preventing the corrosion of rebars of a pier.

Description

Pier corrosion monitoring system

The present invention relates to a pier corrosion check system, and more particularly, an electrode part consisting of an anode zinc and a mesh electrically connected to a cathode reinforcing bar; When it is necessary to measure the current value, the switch unit for electrically connecting the current value transmitted through the electrode unit to the relay unit; A relay unit for transmitting the current value to a terminal of the control unit only when a current is applied by a remote controller; It receives current from the terminal, converts the current analog signal into a digital signal, calculates the digital signal as a current value, and calculates the consumption of zinc and mash and the life of the reinforcing bars calculated through an algorithm input through the terminal. A control unit which transmits to the main unit to determine whether or not the repair work is necessary based on the condition; A self-generated power unit supplying its own power to the control unit; An alarm unit for emitting a notification signal to the LED by comparing the current value and the consumption amount with a reference value through a terminal of the control unit; Based on the algorithm to calculate the digital signal as the current value in the control unit and the consumption of the zinc and mash and the life of the reinforcing bars measured through the main part, a certain amount of consumption is more than a certain value, and the renovation work when the life of the rebar is exceeded. And an input header for inputting a command through a terminal of the control unit, the command including an algorithm to determine the necessity of the pier corrosion check system.

Since almost all metal materials used in industry are extracted from ore while being reduced to metal state, metal materials used in industrial structures or buildings are inevitably caused to corrode or oxidize with the surrounding environment over time. do.

Since most of these corrosion occurs due to the electrochemical reaction caused by the movement of electrons, it is called electrochemical corrosion. The metal structure becomes a corrosion cell as corrosion progresses, causing a corrosion potential, and a constant corrosion current flows into the metal material.

In general, anticorrosion refers to the removal or suppression of one or more conditions of corrosion. The electric method is a method of controlling corrosion of a facility or structure by artificially controlling the potential or current of a facility or structure that requires a method. ), And cathodic protection (Cathodic protection) to cathodic object.

The anode method is used in a limited way because the corrosion is accelerated if the potential control is not precisely made, and the cathode method is mainly used.

The cathodic method is a method of preventing corrosion by artificially lowering the potential of the anticorrosive object, and is classified into an anode method and an external power supply method according to a method of applying an anticorrosive current.

The anode method cathodes the anticorrosive object by electrically connecting a metal with high ionization tendency in the electrolyte to act as an anode, and the external power method connects the negative electrode of a DC power supply or rectifier to the anticorrosive object, The positive current is connected to the positive electrode member to obtain the anticorrosive current.

On the other hand, the metal structures that are the target of the method includes concrete-related structures such as coastal pier, bridges and bridges, reinforced concrete, and devices or structures that are directly exposed to the corrosive environment such as steel bridges or steel structures.

In general, when a metal is immersed in an electrolyte solution, a potential difference occurs between the metal and the solution, which is called a half-cell potential or a single electrode cell. When the ionization tendency is quantified based on a single electrode potential, it is conveniently used in many ways.

But it is virtually impossible to make a cell with only one electrode, a single electrode. However, the concept of single-electrode potential is convenient, so if you select a particular standard single electrode with an arbitrary zero potential as a means and pair it with other single electrodes to form an electrochemical cell, The potential value of an electrode can be measured relatively.

An electrochemical cell refers to a device that converts chemical energy generated by spontaneous chemical reaction into electrical energy. It is formed by combining two kinds of half cells. This is also called a galvanic cell.

There are four elements that make up a galvanic cell: an anode, a cathode, an electrolyte, and a conductor, which is the metallic path of electrons. Same conditions for

The anode is the part of the metal that is corroded to where the oxidation reaction (lost electrons) takes place, and corrosion occurs at the anode.

In the cathode, a reduction reaction (a reaction that consumes electrons generated at the anode) occurs, and a surface of a metal or a semiconductor material becomes a cathode. The electrolyte contacts the anode and cathode with each other, providing a path for ions to pass through.

The conducting wire, which is the movement path of electrons, provides a path for electrons generated at the anode to move to the cathode. Metals play this role because most metals are well-electric. The present invention has been developed based on this principle.

Korean Patent Registration No. 0592553 Korean Patent No. 1764624 Korean Patent No. 1714472 Korean Patent Registration No. 0909255

The present invention has been made to solve the above problems, and measures the numerical value, such as the bipolar amount of the internal reinforcing bar and the zinc mesh and zinc, and the like, the consumption of zinc and mesh and the life of the reinforcing bar according to the measurement results The purpose is to provide a bridge corrosion check system to determine the necessity of renovation based on

In order to solve the above problems, the present invention provides an pier corrosion check system of an pier, comprising: an electrode part consisting of an anode zinc and a mesh electrically connected to a cathode reinforcing bar; When it is necessary to measure the current value, the switch unit for electrically connecting the current value transmitted through the electrode unit to the relay unit; A relay unit transferring the current value to the PC0 (ADC0) terminal and the PC1 (ADC1) terminal of the control unit only when the current is applied by the remote controller; Receives current from the PC0 (ADC0) and PC1 (ADC1) terminals, converts the current analog signal into a digital signal, calculates the digital signal as a current value, and calculates it through an algorithm input through the PB4 (MISO) terminal. A control unit which transmits to the main unit to determine whether a repair work is necessary based on the consumed amounts of zinc and mash and the life of the reinforcing bars; A self-generated power unit supplying its own power to the control unit; An alarm unit for emitting a notification signal to the LED by comparing the current value and the consumption amount with a reference value through the PD5 (T1) and PD6 (AIN0) terminals of the control unit; Based on the algorithm to calculate the digital signal as the current value in the control unit and the consumption of the zinc and mash and the life of the reinforcing bars measured through the main part, a certain amount of consumption is more than a certain value, and the renovation work when the life of the rebar is exceeded. And an input header for inputting a command including an algorithm for determining a necessity of the signal through a PB4 (MISO) terminal of the control unit.

The main unit receives and monitors individual current values and whether repair work is required from the control unit of the bridge.

Predicting the life expectancy of the reinforcing bar to form an anode in the form of a mesh or rod to a size corresponding to the expected life expectancy.

Based on the consumption of the anode zinc and mash electrode measured through the main part and the life of the reinforcing bars, it is determined whether or not repair work is necessary, and if it is determined that replenishment of the cathode is necessary, the maintenance signal and alarm signal of the manager terminal To transmit.

The self-generated power unit is connected to the windmill generator to receive power.

The self-generated power unit is connected to the generator through the vibration of the upper plate of the piers receives power.

The self-generated power unit is connected to the solar generator is supplied with power.

According to the present invention made as described above, it is possible to effectively grasp the consumption or remaining amount of the anode even after installation in the pier and to effectively supplement the anode at an appropriate time at all times, thereby effectively preventing the corrosion of the pier.

In addition, the present invention can solve the problem of the corrosion prevention method using the conventional anode method that the corrosion of the pier rebar due to missing the replenishment time of the anode.

In addition, the present invention can monitor the corrosion progress in real time, it is possible to control the corrosion in whole or in part using the monitored information.

In addition, the present invention can effectively perform monitoring and corrosion protection for structures such as large piers having a complex internal structure.

In addition, the present invention can maximize the use efficiency of the wind by using the natural wind can directly produce power without a separate battery.

In addition, the present invention can provide the auxiliary power in combination by generating four kinds of power at the same time in one place in order to utilize all the natural energy that is present in a variety of locations in one place.

1 is a view showing the overall circuit diagram of the pier corrosion check system according to an embodiment of the present invention.
2 is a view showing in detail the control unit of FIG.
3 is a view showing in detail the signal transmission unit of FIG.
4 is a view showing in detail the electrode portion of FIG.
5 a and b are views illustrating a self-generated power unit and a power panel of FIG. 1.
6 to 9 are detailed views of measured values (water bridge bridge data) through the pier corrosion check system.
10 is a view showing in detail the self-generated power unit according to an embodiment of the present invention.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiment of the present invention may be modified in various forms, the scope of the invention should not be construed as limited to the embodiments described in detail below. This embodiment is provided to more completely explain the present invention to those skilled in the art. Therefore, the shape of the elements in the drawings and the like may be exaggerated to emphasize a more clear description. It should be noted that the same members in each drawing are sometimes shown with the same reference numerals. In addition, detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention are omitted.

1 to 4, the present invention includes an input header 100, a control unit 200, a switch unit 310, a relay unit 320, an electrode unit 400, and a self-generated power unit 500. , Alarm unit 600, the main unit 710, the central management unit 720 and the like.

The electrode unit 400 is formed of an anode zinc (Zn-Anode) and a zinc mesh electrically connected to the cathode reinforcing bars.

When the anode zinc and the zinc mesh are used as common electrodes, the area of the electrode can be widened, and zinc ions can flow into the reinforcing bars.

When the switch unit 310 needs to measure current, it is electrically connected to transfer the current transmitted through the electrode unit to the relay unit.

As shown in FIG. 3A, a zinc plate and a zinc mesh are usually connected to reinforcing bars as a common electrode.

The anode zinc and the zinc mesh are connected by a blue line to replenish ions in the cathode rebar.

If it is necessary to measure the current flowing through the electrode unit 400 by the remote relay, as shown in FIG. ) Transfer to the terminal (red line).

That is, when the relay unit 320 is turned on, the current flowing from the zinc plate and the zinc mesh to the rebar through the control unit 200 through the relay contact moved in the opposite direction is determined to determine whether the value is normal. The display unit of the alarm unit 600 is displayed on the display lamp, and the relay operation is performed for 3 to 5 seconds, which requires measurement, and thus the battery can be used for 5 years or more.

In addition, when reconstruction, inspection work, etc. are carried out, the line is turned OFF (yellow line) as shown in FIG. 3C.

That is, the switch SW2 is a device having a function of electrically separating the zinc plate, the mesh and the reinforcing bar, and can be used for the inspection of the zinc plate, the mesh, and the like.

The control unit 200 receives a measurement current (eg, bipolar amount) from the PC0 (ADC0) and PC1 (ADC1) terminals of the control unit, converts the current analog signal into a digital signal, and converts the digital signal into a current value. It calculates as, and acts as a master unit to determine the need for renovation based on the consumption of the zinc and mash and the life of the reinforcing bars calculated through the algorithm input through the PB4 (MISO) terminal. In the present invention, an ATmega328-TQ chip was used.

The self-generating power unit 500 is a device for supplying its own power to the control unit. The self-generating power unit 500 may generate power by using vibration, wind power, solar heat, etc., and then charge the battery or directly supply the control unit.

The alarm unit 600 is a device that emits a notification signal to the LED by comparing the current value and the consumption amount with a reference value through the PD5 (T1) and PD6 (AIN0) terminals of the control unit.

The input header 100 is equal to or greater than a certain value based on an algorithm for calculating the digital signal as a current value in the control unit and the consumption of zinc and mash and the life of the reinforcing bar measured through the main unit 710. In this case, a device for inputting a command including an algorithm for determining the necessity of renovation when the life of the rebar is exceeded is input through the PB4 (MISO) terminal of the control unit.

In addition, the vibration sensor 610 is electrically connected to the control unit 200 may be installed on the pier top plate. The vibration sensor 610 detects an earthquake around the piers and may transmit earthquake information to the manager through the control unit 200.

On the other hand, depending on the installation location of the piers, the anode may be consumed earlier than the expected life expectancy due to some unexpected cause.In this case, anode zinc should be replenished before the original life expectancy. Since the consumption and remaining amount of anodes are not known on the ground, there is a problem that corrosion of the reinforcing bars is missed due to the lack of proper replacement time.

In addition, by measuring the anticorrosive current, the present invention can easily grasp the consumption or remaining amount of the anode even after installation of the anode, and always replenish the anode at an appropriate time to effectively prevent corrosion of the reinforcing bars.

In addition, unlike the life expectancy at the time of initial installation, even if the anode is abnormally consumed, corrosion can be effectively prevented and the operating cost can be reduced.

To this end, the present invention may further include a main unit 710 that receives the current value information from the control unit 200 and monitors whether maintenance work is necessary, for example, current for one pier. An integrated corrosion monitoring and control system (ICMCS) can be used that integrates the value information and monitors the entire area as a whole. The main unit 710 connected to the wireless network through the control unit 200 and the wireless communication unit (not shown) transmits information on the current area to the central management unit 720 to determine whether the central management unit 720 needs repair work. It is possible to determine, and allows the administrator to check through the manager terminal 730 connected to the network to the central management unit 720.

By predicting the life expectancy of the reinforcing bar, a positive electrode may be formed in the form of a zinc mesh or rod to a size corresponding to the expected life expectancy. For example, you may want to add the mortar injection of the monitored part, the fiber jacket and the anode zinc as part of the repair work.

Based on the consumption of the anode electrode and the life of the reinforcing bar measured through the main unit 710, the central management unit 720 determines whether or not repair work is necessary, the central management unit 720 needs to replenish the anode If it is determined that the maintenance unit notification signal and the alarm signal through the alarm unit 600 may be transmitted to the manager terminal 730. The manager terminal may be a smartphone, a mobile phone, etc. as the terminal possessed by the manager, and may receive the corrosion state information of the victim zinc to monitor the corrosion progress of the sacrificial anode.

Therefore, the present invention can monitor the progress of corrosion in real time through the main unit 710, and may have the advantage that the control unit 200 can control the corrosion in whole or in part using the monitored information.

In addition, the control unit 200 may partially supply current so that corrosion can be prevented with priority for reinforcing bars among the entire bars in the bridge.

That is, the present invention can be used semi-permanently because the control unit 200 can be selectively controlled only where the corrosion proceeds.

Alternatively, the control unit 200 may perform monitoring and corrosion control of the pier structure for each section.

In addition, the self-generating power unit 500 also supports a method of supplying power in a distributed form for each compartment. This configuration enables effective control of monitoring and corrosion protection of structures such as large piers with complex internal structures.

The required weight of the anode zinc installed according to the present invention was calculated using Equation 1.

For example, in the present invention, it is assumed that the reference data value of each pier is the rebar potential (mV) / SSCE, ballast ratio 50%, the minimum current is more than 1mA, the sacrificial anode is made of zinc alloy and the current efficiency is 95 in seawater. It is more than% and the required current of material is 780A.Hr/kg.

As shown in FIG. 5A, the present invention provides an electrode unit including anode zinc and a mesh electrically connected to cathode reinforcing bars; When it is necessary to measure the current value, the switch unit for electrically connecting the current value transmitted through the electrode unit to the relay unit; A relay unit transferring the current value to the PC0 (ADC0) terminal and the PC1 (ADC1) terminal of the control unit only when the current is applied by the remote controller; Receives current from the PC0 (ADC0) and PC1 (ADC1) terminals, converts the current analog signal into a digital signal, calculates the digital signal as a current value, and calculates it through an algorithm input through the PB4 (MISO) terminal. And a control unit which transmits the main unit to determine whether or not the repair work is necessary based on the consumed amount of zinc and mash and the life of the reinforcing bars.

The present invention also provides a self-generated power unit for supplying its own power to the control unit; An alarm unit for emitting a notification signal to the LED by comparing the current value and the consumption amount with a reference value through the PD5 (T1) and PD6 (AIN0) terminals of the control unit; Based on the algorithm to calculate the digital signal as the current value in the control unit and the consumption of the zinc and mash and the life of the reinforcing bars measured through the main part, a certain amount of consumption is more than a certain value, and the renovation work when the life of the rebar is exceeded. And an input header for inputting a command including an algorithm for determining a necessity of the signal through a PB4 (MISO) terminal of the control unit.

As shown in Figure 5b, the present invention is a power supply switch 500 ', which is connected to the self-generated power unit 50, etc. to the PCB plate, power supply 510' for supplying power, remote control switch 310 ', control Central processing unit 200 'including unit 200, LED 600' having an alarm function to warn the need of zinc replacement or repair work, toggle switch to turn on to measure the current flowing in the electrode unit After turning on the toggle switch 320 'including the 320' and the like, the relay unit 320 may detect the amount of current for 20 to 40 seconds using a remote controller or the like. In this case, the toggle switch 320 'may serve as the switch SW2 of FIG. 3, but is not limited thereto.

As illustrated in FIGS. 6 to 9, the amount of bipolarity is a method of determining the pure anticorrosive performance of a metal excluding an IR drop caused by an external environment.

In brief, the total reconstruction significantly reduces the amount of bipolar than the initial one. In addition, it is judged that the initial stage is the amount of bipolarity measured by the decrease in specific resistance due to the rework. There is also a decrease in bipolar amount due to a decrease in resistivity.

The reverse potential of some sections is judged to be an error by measurement, and a partial fluctuation in the amount of bipolar is judged to be caused by the environment or measurement.

In particular, as shown in Fig. 8, partial grouting (lift mortar injection + fiber jacket + Zn-Anode), re-construction (reconstruction after removal of the existing anticorrosive part), unlifted (fiber jacket + Zn-Anode) Was compared numerically.

As shown in FIG. 10, the self-generated power unit 500 may use the windmill generator 510, which is installed at an arbitrary position of a bridge supporting the piers and is rotatably arranged by a bearing therein. It consists of an inner blade rotating body and a support body for supporting the inner wing rotating body to produce electric power by using the rotational force of the inner wing rotating body that rotates by the wind is accelerated while rotating surrounding the bridge of the piers.

The self-generated power unit 500 may use the generator 520 by vibration, the energy harvesting device for harvesting the fine vibration energy, the piezoelectric element is installed at any position on the top of the pier, so as to face both ends of the piezoelectric body It includes a plurality of metal plates positioned and a plurality of elastic bodies located between the metal plates.

The piezoelectric body includes a substrate, a piezoelectric layer formed on one surface of the substrate, an electrode layer formed on an upper surface of the piezoelectric layer, and an insulating layer formed on an upper surface of the electrode layer.

Therefore, the power generated by the piezoelectric material and the metal plate may be stored and transferred to or stored in the self-generated power unit 500.

In addition, the self-generated power unit 500 may use a generator 530 by solar heat.

In addition, the self-generated power unit 500 may use the generator 540 by digging.

For example, the self-generated power unit 50 is installed in a pier immersed in the river, when the digging pushes up the barge from below, the barge is raised, and when the digging is extinguished, the barge is lowered by its own weight. Auxiliary power can be generated by converting the linear motion into a rotary motion to generate auxiliary power. In addition, it can generate its own power using sea wind, vibration, and sunlight.

100: input header
200: control unit
310: switch unit
320: relay unit
400: electrode portion
500: Self-generated power department
510: Windmill Generator
520: generator by vibration
530: solar generator
600: alarm unit
200 ': central processing unit with control unit
310 ': remote control switch
500 ': Power switch
510 ': Power
610: vibration sensor

Claims (6)

In the bridge corrosion check system of the bridge,
An electrode unit including anode zinc and mesh electrically connected to the cathode reinforcing bars;
Normally, the anode zinc and the mesh of the electrode part are connected to the cathode electrode with the closed electrode as a common electrode, and when the current value needs to be measured, the switch electrically connects the electrode part and the relay part to transfer the current transmitted through the electrode part to the relay part. part;
A relay unit for transmitting the current of the switch unit to the PC0 (ADC0) terminal and the PC1 (ADC1) terminal of the control unit only when the current value is required and the current is applied by the remote controller;
Receives current from the PC0 (ADC0) and PC1 (ADC1) terminals, converts the current analog signal into a digital signal, calculates the digital signal as a current value, and calculates it through an algorithm input through the PB4 (MISO) terminal. A control unit which transmits to the main unit to determine whether a repair work is necessary based on the consumed amounts of zinc and mash and the life of the reinforcing bars;
A self-generated power unit supplying its own power to the control unit;
An alarm unit for emitting a notification signal to the LED by comparing the current value and the consumption amount with a reference value through the PD5 (T1) and PD6 (AIN0) terminals of the control unit;
Based on the algorithm to calculate the digital signal as the current value in the control unit and the consumption of the zinc and mash and the life of the reinforcing bars measured through the main part, a certain amount of consumption is more than a certain value, and the renovation work when the life of the rebar is exceeded. And an input header for inputting a command including an algorithm for determining a need for an input through a PB4 (MISO) terminal of the control unit. The method of claim 1,
Wherein the anode zinc and the zinc mesh as a common electrode to widen the electrode area, pier corrosion check system, characterized in that the zinc ion generated in the large area is supplied to the reinforcing bars. The method of claim 1,
When the relay unit 320 is turned on, the current flowing from the zinc plate and the zinc mesh to the rebar through the control unit 200 through the relay contact moved in the opposite direction is determined to determine whether the value is normal. Pier corrosion check system, characterized in that displayed on the display lamp of the alarm unit (600). The method of claim 1,
Based on the consumption of the anode zinc and mash electrode measured through the main part and the life of the reinforcing bars, it is determined whether or not repair work is necessary, and if it is determined that replenishment of the cathode is necessary, the maintenance signal and alarm signal of the manager terminal Pier corrosion check system, characterized in that the transmission to. The method of claim 1,
The self-generated power unit is connected to the windmill generator to receive power, or connected to the generator through the vibration of the top of the pier to receive power, or pier corrosion check system, characterized in that the power is connected to the solar generator. The method of claim 1,
The control unit is electrically connected to the vibration sensor is installed on the pier top plate, the vibration sensor detects the earthquake around the piers and can transmit the earthquake information to the manager through the control unit pier corrosion check system, characterized in that.

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