KR20120077999A - Monitoring system of ship tank corrosion in use corrosion sense - Google Patents

Abstract

PURPOSE: A corrosion monitoring system for a ship is provided to achieve the successive and simultaneous measurement of data because the states of a tank for a ship are detected and all kinds of data are collected in real time. CONSTITUTION: A corrosion monitoring system for a ship comprises a mode inspecting device and a main control system. The mode inspecting device comprises a detecting sensor(341), a data storage part, a control terminal , a control device(340), and a transmission and reception device. The detecting sensor detects the potential difference of a reference electrode and a metal body of a target mode structure. The data storage part stores the detected potential data. The control terminal controls output values according to control signals from an embedded system to control the mode of the metal body. The control device controls the data storage and read-out of the data storage part and controls the output values of the control terminal. The transmission and reception device transmits the signals of the potential data to the embedded system and receives the control signals from the embedded system.

Description

Monitoring system of ship tank corrosion in use corrosion sense}

The present invention relates to a corrosion monitoring system of a ship using a corrosion sensor, and more particularly, to corrode the information collected using the corrosion sensor in connection with an embedded system as the ship concept evolves into a digital ship in which IT convergence technology is activated. It is used for feedback control to suppress the oil pressure and it is related to corrosion monitoring system of ship using corrosion sensor that combines IT and anticorrosive technology for economic and safe operation of the ship.

In general, the steel used in the tank of the various steel used in the ship is very severe corrosion damage caused by the environment inside the tank. In the tank, various types of corrosion progress due to mixed seawater, inert gas sent into the tank for explosion prevention of salt in oilfield salt, and condensation due to internal temperature difference, and the corrosion rate is much higher than that of general brine environment. In particular, a large number of pits (diameters of 50 mm or less) occur in the guide bottom plate of the tank, and the growth rate of the pits may reach up to 4 mm / y. Unlike the bottom plate of the tank, the top plate has a corrosion rate of up to 0.3 mm / y, which does not significantly exceed the average wear rate of 0.1 mm / y due to corrosion considered in the hull design.

In order to avoid such corrosion damage, some anticorrosive coating on the tank material has been implemented, but the initial coating cost and the subsequent repainting cost are incurred, and in some paint defects, local corrosion may be further enhanced.

In addition, if the thickness of steel sheet is increased in consideration of the loss of thickness due to corrosion, not only the steel cost but also the weight of the ship itself becomes heavy, so various problems such as the increase of fuel consumption occur. There is a demand for development of excellent marine steels.

Differences in corrosion patterns and rates of corrosion in different parts of the tank are due to differences in corrosion environments and mechanisms. In the tank bottom plate, corrosion starts by brine or seawater introduced from the surrounding area, but the corrosion area is limited to the area where the defect of the oil coating layer occurs. Acidify the brine in. As the hydrogen ions generated by corrosion deteriorate with chlorine ions in the brine and continue to stagnate at the corrosion sites, the local corrosion sites become more acidic and the corrosion speed becomes faster with acidification. do. In fact, the analysis of the solution collected from the inside of the plant found in the ship in operation showed a very low acidity with a pH close to 1.0. Therefore, the steel used as the tank preferably exhibits excellent corrosion resistance in a strong acid brine atmosphere.

Therefore, the current status of corrosion inspection activities in the corrosion protection field is requested by the owner who owns the corrosion protection objects (gas pipeline, oil pipeline, water supply and sewage pipe, various tanks of petrochemical complex, other underground metal deposits, etc.) to the company or the related corrosion protection company. For example, the pumice inspection activities are carried out on a regular or regular basis in relation to the corrosion of the anticorrosive objects.

The above-mentioned corrosion detection is performed by hand intermittently using an analog meta (tester) or a portable chart recorder (EPR), and in this case, the measurement lead wire in the test box for corrosion potential measurement. (The pipe is connected to + and the reference electrode is connected to-), and the corrosion potential needs to be measured for a predetermined time by moving to a point where it is easy to measure.

Therefore, in recent years, corrosion monitoring devices that are introduced into the terminal box for corrosion potential measurement have been used, but these devices are installed at the site, store the corrosion information in memory, collect them in the office, and store and analyze the data again through a computer. Hassle still remains.

Therefore, the present invention is to solve such a problem, an object of the present invention can provide a stable communication environment through feedback control through corrosion monitoring processing and method control processing according to the embedded system through a corrosion monitoring sensor. To provide a corrosion monitoring system for ships using a corrosion sensor.

Corrosion monitoring system of the ship using the corrosion sensor according to the present invention is a corrosion sensor for checking and controlling the corrosion and corrosion status of the vessel tank through the corrosion control system of the corrosion sensor installed in the vessel tank, the main control system, and the data transmission system In the corrosion monitoring system of the ship, the anticorrosive inspection device is a detection sensor for detecting the potential difference between the reference electrode and the metal body of the anticorrosive structure, a data storage unit for storing the detected potential data, and from the embedded system A control terminal for controlling a method of a metal body by adjusting its output value according to a control signal of the controller; a control device for controlling data storage and reading of the data storage unit; and controlling an output value of the control terminal; and embedding a potential data signal. Transmit to the system and receive the control signal from the embedded system A transmitting and receiving device for; The embedded system includes one or more anticorrosive treatment applications for automatically evaluating corrosion and anticorrosive conditions and calculating anticorrosive control values by comparing and determining corrosion and anticorrosive data obtained from the anticorrosive inspection apparatus with a set reference value; A transceiver for receiving a potential data signal from the method checking device and transmitting a control signal to the method checking device, data storage means for storing data obtained from the method checking device and processing result data thereof, and the data storing means. A central processing means for storing and reading the data or controlling the operation of the anticorrosive processing application program, and a terminal output value adjusting unit for adjusting the anticorrosive potential of the control terminal according to the corrosion and anticorrosive status of the anticorrosive processing application. ; The data transmission system is characterized in that for transmitting the method check data and control data between the method measuring device and the embedded system through a wired or wireless communication network.

Corrosion monitoring system of the vessel using the corrosion sensor of the present invention, by monitoring the state of the tank of the vessel in real time and collects various data in real time, it is possible to make a continuous and simultaneous measurement of the data, database the collected data The integrated management is possible according to the measuring point, and by analyzing the collected database, it is possible to quickly and accurately determine the progress of the corrosion method of the ship tank. Allows immediate action on corrosion or corrosion.

In addition, it can save the cost and labor cost to move to the ship tank, and has the effect of preventing the safety accident according to the measurement once installed in a dangerous area to measure.

1 is a block diagram of a corrosion monitoring system of a ship using a corrosion sensor according to the present invention.
2 is a schematic diagram of a corrosion monitoring system of a ship using a corrosion sensor;

In order to achieve the above object will be described in detail through the following detailed description and drawings.

In order to achieve the above object, the corrosion monitoring system of a ship using a corrosion sensor according to the present invention is equipped with a corrosion sensor installed in a vessel tank, an anticorrosive inspection device 300, an embedded system 200, and a data transmission system. In a ship corrosion monitoring system using a corrosion sensor for checking and controlling the ship's corrosion and anticorrosive condition, the anticorrosive inspection device 300 detects a potential difference between a reference electrode and a metal body of the preload tank 341. And a data storage unit 344 for storing the detected potential data, a control terminal 320 for controlling a method of a metal body by adjusting its output value according to a control signal from the embedded system 200, and A control device 340 for controlling data storage and reading of the data storage unit 344 and for controlling an output value of the control terminal 320; Sent to de system 200 and includes a transmission and reception apparatus 330 for receiving control signals from the embedded system (200); The embedded system 200 compares the corrosion and anticorrosive inspection data obtained from the anticorrosive inspection apparatus 300 with a predetermined reference value to automatically evaluate the corrosion and anticorrosive state, and calculates an anticorrosive control value accordingly. Application programs 210 and the transceiver 230 for receiving the potential data signal from the method check device 300 and transmits a control signal to the method check device 300, and from the method check device 300 Data storage means 240 for storing the obtained data and the processing result data; and central processing means for storing and reading the data of the data storage means 240 or controlling the operation of the anti-corrosion processing application 210 ( 220 and the terminal output value adjusting unit 260 for adjusting the anticorrosive potential of the control terminal 320 according to the corrosion and anticorrosive state of the anticorrosive treatment application 210. And comprising; The data transmission system is characterized in that for transmitting the method check data and control data between the method measuring device 300 and the embedded system 200 through a wired or wireless communication network.

Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic diagram of a corrosion monitoring system of a ship using a corrosion sensor according to the present invention, and FIG. 2 is a schematic view of a corrosion monitoring system of a ship using a corrosion sensor.

As shown in Figure 1 and 2, the anti-corrosion state check and control system according to the present invention includes a control terminal 320, wired and wireless transceiver 330, electrode terminal 342, etc. Determination of corrosion and the degree of corrosion based on the anticorrosive inspection device 300, such as a method / corrosion sensor for measuring various data for checking and controlling the anticorrosion state, and the data signal obtained from the anticorrosive inspection device 300 And the embedded system 200 for controlling the method check device 300 and informing the method status information to the method device manager in real time through the Internet or a mobile communication terminal, and if necessary, satellite communication, LAN network, wireless communication network, The data transmission system may be configured to transmit data and control signals between the method check apparatus 300 and the embedded system 200 through a communication cable.

As shown in FIG. 1, the anticorrosive inspection apparatus 300 includes a detection sensor 341, a data storage unit 344, a transceiver 330, a power supply unit 310, and a control terminal 320. And a control device 340 and an A / D converter 343. The electrode terminal (+) 342 is connected to a metal body to measure the potential difference with the reference electrode, and then the data accordingly. Transmitting a signal to the embedded system 200 through a wired or wireless communication network and receiving a method control signal from the embedded system 200 to control the output value (voltage or current) of the control terminal 320 to the metal structure of the ship tank Will be the way.

The detection sensor 341 may alternatively be used as a corrosion sensor or an anticorrosive sensor, and an integrated detection sensor 341 capable of simultaneously measuring corrosion and anticorrosion may be used.

The detection sensor 341 and the control terminal 320 is built into the anti-corrosive inspection device 300 integrally or the detection sensor 341 is built in various parts of the vessel tank 10 to the corrosion potential Measurement and the control terminal 320 may be separately constructed and controlled by the embedded system 200.

The detection sensor 341 is composed of a (+) (-) electrode terminal, and a metal body is connected to a (+) terminal, and a (-) terminal is connected to a reference electrode body to measure a corresponding potential difference, and the analog signal is measured accordingly. It sends to the A / D conversion part 343. The detection sensor 341 is arranged in one or more major parts depending on the type of the vessel tank (10).

The A / D converter 343 converts the potential signal into a digital signal and stores the converted signal in the data storage unit 344.

In addition, the control device 340 controls the data to be stored in an appropriate storage table by assigning a code according to the type of the measured value measured by the detection sensor 341 or the control terminal 320 in storing the data and storing the data. The potential data and the terminal data stored in the unit 344 are read at regular intervals and transmitted to the embedded system 200 through the transceiver device 330.

In this case, the measured and stored data includes output voltage of the control terminal 320, output current of the terminal, anticorrosive potential (eg, tolerant potential), instant off potential, depolarization rate, and corrosion. There may be metal losses, natural potentials, etc. in test specimens for velocity measurement.

In addition, when the control terminal 320 is configured integrally, the control device 340 determines the control signal received from the embedded system 200 to control the output voltage or output current of the control terminal 320. do. In controlling the control terminal 320, various control methods that can be implemented such as input voltage control, frequency control, and firing angle control may be introduced. On the other hand, the control terminal 320 is a device for preventing corrosion of the metal body by applying an appropriate DC voltage to the metal body to suppress the movement of electrons due to corrosion.

The power supply unit 310 is for supplying power required for potential measurement, data storage and control, etc., and generally includes a storage battery.

The anticorrosive inspection apparatus 300 configured as described above is installed at regular intervals for each main portion of the ship tank 10 to check the manner and corrosion state of the tank and also, if necessary, simultaneously by using a plurality of control terminals 320. In this case, the present invention can obtain instantaneous electrostatic potentials measured at several places simultaneously using a GPS (Global Positioning System) such as a satellite communication network, thereby making it possible to determine accuracy of corrosion and corrosion protection. Will be.

Meanwhile, the embedded system 200 may include one or more anticorrosive processing applications 210 including a corrosion monitoring program 211, an instantaneous electrostatic potential measurement program 212, and a method monitoring and control program 211 and 213. A transceiver 230, a central processing unit 220, a data storage unit 240, an input / output unit 250, a terminal output value adjusting unit 260, an abnormality display unit 261, An alarm generator 262, a wireless call means 270, and a web server are used to determine the corrosion and corrosion status based on the data obtained from the corrosion prevention apparatus 300 to provide an appropriate method control signal. It is to calculate and to facilitate the control of the system by using the Internet or mobile communication means.

The central processing unit 220 is for controlling the storage and reading of data and the operation of various software and hardware of the embedded system 200.

The system monitoring and control programs 211 and 213 are application software for monitoring or controlling the system status of the vessel tank 10, and the output voltage and output of the control terminal 320 for the vessel tank 10 system. The current is obtained from the anti-corrosion check apparatus 300 and compared with the reference voltage or current set in the anti-corrosion check and control programs 211 and 213. By controlling the terminal 320 (input voltage or current control, frequency control, etc.) it is to control the constant voltage or current of the vessel tank 10 or to automatically control the variation to the required value. In addition, through the anti-corrosion and control program (211, 213) it is possible to monitor the map in which the anti-corrosion equipment is installed, it is possible to check the state of the anti-corrosion equipment or vessel tank 10 in operation on a computer monitor. In addition, the method reference voltage of the control terminal 320 can be set, and the current value at that time is measured, and when the method target area is input, the average method current density is calculated and displayed.

In addition, since the method potential of the control terminal 320 transmitted from each method checking apparatus 300 is displayed, and the upper limit value and the lower limit value of the appropriate method potential can be determined and inputted, the data color on the screen is out of the limit value. For example, if it turns red and an alarm sounds and the technician is out of the control room, it is designed to recognize the current situation by radio call. You can adjust the transmission cycle of various data, and all menus can automatically create and save files and read and analyze the saved files again.

The instantaneous electrostatic potential measurement program 212 is to determine the state of the vessel tank 10 by generating a momentary electrostatic potential in the control terminal 320 and measuring the change state accordingly, and when executed, the control device ( 340, the control terminal 320 is blackout within several to several tens of milliseconds, the momentary electrostatic potential (Off-potential) is measured at this time, and the potential change amount by measuring the bipolar potential after a suitable time (4 hours or 24 hours) (ΔEshift = bipolar potential-instantaneous electrostatic potential) can be used to evaluate whether the mode is in proper condition. In addition, the manager inputs a reference potential change amount, a bipolar potential measurement time, etc. required for the instantaneous electrostatic potential measurement program 212 through the input / output means 250 to adjust the mode state by an appropriate value according to the vessel tank. Can be.

The corrosion monitoring program 211 automatically determines the current state of corrosion based on the potential data measured by the detection means of the corrosion checking device, and from a corrosion rate measuring sensor that can be installed around the vessel tank 10. As the application software for acquiring the corrosion rate information to check the corrosion progress rate, the embedded system 200 displays the overall corrosion state of the ship tank 10 on a monitor or through other display means. .

The terminal output value (voltage / current) adjusting unit 260 compares the data collected from the anticorrosive checking device 300 with reference values for corrosion and anticorrosive state set by the anticorrosive processing application 213 and then determines the result. In order to increase or decrease the terminal output voltage value or the current value according to the operation with the control method 213.

In addition, the control of the conventional anticorrosive device does not respond quickly to corrosion of the structure and accurate anticorrosive control because the administrator determines the corrosion state based on the collected potential data and then manually adjusts the terminal output value. However, according to the present invention, the method control program 213 automatically grasps the method status through the method check data and controls it through a remote control system, so that it can be maintained at a predetermined method potential or controlled at an appropriate method value. do.

On the other hand, the alarm generating unit 262 generates an alarm when the corrosion is occurring or the method is not performed in an appropriate range as a result of determining the corrosion and corrosion protection by the corrosion monitoring program 211 or the anti-corrosion check program 213. In order to make it easy for the administrator to check whether there is an abnormality, the alarm status display means 261 displays the alarm operation to the manager through a change in sound or color.

In addition, the alarm generating unit 262 checks the information (caller number, terminal number, etc.) of the administrator in advance by operating the wireless call means 270 when there is an abnormality in corrosion and anticorrosive state, the administrator's wireless Through the pager or the mobile terminal, information related to the alarm (method error information, error location, abnormality, etc.) is transmitted.

In addition, it is possible to display and confirm the databased information on the embedded system 200, and a series of processes and features to perform the corrosion / corrosion monitoring system (211, 213) because all data collection or output control using a computer ) On the Internet web page, the technician can log in and operate the system from any location.

In addition, the transmission and reception device 230 is made of communication equipment such as a modem device in order to be connected to a wired communication network (general telephone line, communication cable, LAN network, etc.), or short-range or long-distance wireless communication network (or WiFi, satellite communication, etc.) It can be made with an antenna or the like to be linked.

On the other hand, the data transmission system may be made of a general telephone line, LAN network, wireless (mobile) communication network, satellite communication network and the like. In particular, when the ship tank is long or large, since a plurality of terminals are used at the same time, GPS (Global Positioning System) is used to accurately measure instantaneous electrostatic potential.

In addition, the data transmission system may be directly transmitted without a separate data collection means in transmitting various types of signals generated from the method check apparatus 300 to the embedded system 200, and the intermediate embedded system ( By arranging 200, a predetermined amount of data collected from the ship tank 10 may be collected and determined, and the selected data may be periodically transmitted to the embedded system 200. The choice of this approach depends on the distance or range of the ship tank 10.

The present invention is not limited to the above-described embodiments and the accompanying drawings, and various changes, modifications and variations may be made without departing from the scope of the present invention. Will be apparent to those of ordinary skill in the art.

Embedded system: 200, Application program: 210, Corrosion monitoring software: 211, Correction potential measurement software: 212, Anticorrosive control software: 213, Central processing unit (CPU): 220, Transceiver unit: 230, Data storage unit: 240, Input / Output means: 250, terminal output voltage control unit: 260, abnormality display means: 261, alarm generating unit: 262, wireless call means: 270, web server: 280, anticorrosive checker: 300, power supply: 310, control Terminal: 320, Transceiver: 330, Control: 340, Detection Sensor: 341, Electrode Terminal: 342, A / D Converter: 343, Data Storage: 344

Claims (4)

In the corrosion monitoring system of the ship using the corrosion monitoring system of the corrosion sensor installed in the vessel tank, the main control system, and the corrosion sensor for checking and controlling the corrosion and corrosion status of the vessel tank through the data transmission system, Is a detection sensor for detecting a potential difference between a reference electrode and a metal body of an anticorrosive structure, a data storage unit for storing the detected potential data, and an output value of the metal body by adjusting an output value according to a control signal from an embedded system. A control terminal for controlling a control unit, a control device for controlling data storage and reading of the data storage unit, and controlling an output value of the control terminal, transmitting a potential data signal to the embedded system and receiving a control signal from the embedded system. A transmitting and receiving device for; The embedded system includes one or more anticorrosive treatment applications for automatically evaluating corrosion and anticorrosive conditions and calculating anticorrosive control values by comparing and determining corrosion and anticorrosive data obtained from the anticorrosive inspection apparatus with a set reference value; A transceiver for receiving a potential data signal from the method checking device and transmitting a control signal to the method checking device, data storage means for storing data obtained from the method checking device and processing result data thereof, and the data storing means. A central processing means for storing and reading the data or controlling the operation of the anticorrosive processing application program, and a terminal output value adjusting unit for adjusting the anticorrosive potential of the control terminal according to the corrosion and anticorrosive status of the anticorrosive processing application. ; The data transmission system is a corrosion monitoring system of a ship using a corrosion sensor, characterized in that for transmitting the method check data and control data between the method measuring device and the embedded system through a wired or wireless communication network. The method of claim 1, wherein the data transmission system is characterized in that when the facility is installed in a wide range of tank tanks, the method of the corrosion detection data of the corrosion sensor of the corrosion sensor which is built in a large number by using a satellite communication network is temporarily obtained and transmitted. Corrosion monitoring system for ships using corrosion sensors. According to claim 1, The embedded system using the corrosion sensor, characterized in that it further comprises a wireless call means for notifying the administrator of the method object via the mobile communication terminal when the ship tank is out of the proper mode state. Ship's corrosion monitoring system. The corrosion monitoring of a ship using a corrosion sensor according to claim 1, wherein the embedded system enables the system administrator to manage the anticorrosive system on the Internet by constructing an anticorrosive web server and an anticorrosion and control website on the Internet network. system.

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