KR100715028B1 - System for controlling the gas leakage alarms using touch screen - Google Patents

Abstract

Gas leakage alarm control system using a touch screen according to the present invention, distributed in places where there is a risk of leakage of flammable gas to measure the concentration of the flammable gas in real time, and converts the measured concentration value into a current signal of a predetermined range One or more gas detectors to transmit through the signal wires, the communication controller 40 is connected to the gas detectors through the signal wires, and collects the output signal of the gas detectors (70a, 70b), LCD (LCD) Composed of the display unit 310 and the input unit 320 integrally installed on the display unit 310 is pressed on the display screen is possible to input a command, the operation of the gas detector by the data received from the communication controller 40 Is connected to the touch screen device 30, the communication controller 40 to display the status, the concentration of the gas detected by the gas detectors is a predetermined alarm A programmable logic controller (PLC) 41 which outputs a control signal as pre-programmed to indicate an alarm condition when the level is exceeded, and an alarm buzzer and a gas leakage alarm operating according to an output control signal of the programmable logic controller 41 It includes a lamp. The present invention centrally connects a plurality of gas detectors to display the operation status and alarm occurrence of the gas detectors at a glance on a touch screen, thereby facilitating management and monitoring of the plurality of gas detectors, and historical data related to alarm generation. There is an advantage that can be used for post-check by storing them in memory.

Gas, Gas Leakage, Flammability, Control Box, Reception Panel, Touch Screen, Alarm Control, Real Time, Trend, History, Monitoring

Description

System For Controlling The Gas Leakage Alarms Using Touch Screen}

1 is a perspective view of a gas leakage alarm reception control device 1 in a housing 10 of a gas leakage alarm control system using a touch screen according to the present invention, and FIG. 11 shows an open state.

3 is a front view of the gas leakage alert reception control apparatus 1 of FIGS. 1 and 2.

4 is an overall configuration diagram of a gas leakage alarm control system using a touch screen according to the present invention, and FIG. 5 illustrates a relationship between the touch screen device 30, the communication controller 40, and the PLC 41 in the system of FIG. 4. It is shown in more detail.

FIG. 6 illustrates a state in which an alarm / bar graph mode is output as an example of a gas detector monitoring system in a display unit of the touch screen device 10 in the gas leakage alarm control system using the touch screen according to the present invention. 7 is an enlarged view of one individual display area 354 in FIG.

8 illustrates a state in which a "real time trend graph" is output to a display unit of the touch screen device 10 in the gas leakage alarm control system using the touch screen according to the present invention.

9 illustrates a state in which a "history trend graph" is output on a display unit of the touch screen device 10 in the gas leakage alarm control system using the touch screen according to the present invention.

FIG. 10 shows a state in which the "detector position display mode" is outputted on the display unit of the touch screen device 10 in the gas leakage alarm control system using the touch screen according to the present invention.

FIG. 11 shows a state in which "alarm list display mode" is outputted on the display unit of the touch screen device 10 in the present invention.

FIG. 12 shows a state in which the operation states of all gas detectors are displayed on one screen in the display unit of the touch screen device 10 according to the present invention.

* Description of the symbols for the main parts of the drawings *

1: Gas leakage alarm reception control device 4: Circuit breaker (MCCB)

10: enclosure 11: door

12: handle 13: viewing window

21: main power lamp 22: alarm buzzer

23: gas leakage alarm lamp 24: fault alarm lamp

25: Buzzer stop button 26: Alarm return button

30: touch screen device 35: touch screen screen

36: touch screen frame 40: communication controller

41: PLC 45,61,62,63,64: Signal wire

50a, 50b, 50c, 50d, 50e: switch 70, 71: gas detector

220: alarm buzzer 230: gas leakage alarm

240: failure alarm 250: buzzer stop button

260: alarm return button 270: external output relay

300: display and input module 310: display unit

320: input unit 330: control unit

331: memory 340: power unit

351: upper display area 351a: previous button

351b: Next button 352a: Check button

352b: test button 352c: calibration button

353,353a: mode display area

354: data display area of the individual gas detector

354a: gas detector number display 354b, 353c, 354d: lamp

354e: gas leakage display 354f: bar graph

354g: Alarm 1 indication 354h: Alarm 2 indication

354i: fault indication 354j: test indication

354k: Return indication 361,362,363,364: Detector position button

365: alarm / graph button 366: real time trend button

367: history trend button 368: alarm list button

369: alarm screen 370: graph display area

371a, .., 371f: Buttons 372: Detector position display area

373a, 373b: display of individual gas detector positions

374: Alarm list display area 376: Individual gas detector data display

380: individual gas detector data display area

381: gas concentration indication 401: fuse

402: surge pack 403: noise filter

404: power lamp 405: power supply

The present invention relates to a gas leakage alarm control system using a touch screen, and in particular, by connecting a plurality of gas detectors installed in a place where there is a risk of leakage of flammable gas and carbon dioxide in a centralized manner to touch the operation status and alarm occurrence of the gas detectors The screen display makes it easy to manage and monitor a large number of gas detectors, and saves data on the operation status of the gas detectors in memory so that they can be referenced later to efficiently cope with the risk of gas leakage. It relates to a gas leakage alarm control system using a touch screen.

In modern society, fossil fuels such as petroleum, natural gas (LNG), and liquefied petroleum gas (LPG) are used as the main energy sources. It is widely used as a power source in industrial sites.

Recently, as more factories and industrial sites deal with flammable gas, the risk of leakage due to the handling of flammable gas also increases. If a flammable gas leaks, it can cause enormous damages due to explosion and fire.In general, industrial sites that produce and manage flammable gas have gas detectors that can detect gas leakage at an early stage. If necessary, take prompt action.

However, the conventional flammable gas detector has a disadvantage in that it is difficult to centrally control and manage each gas detector in the center because it is installed and operated separately in a large area.

In addition, conventionally, a receiving panel that collects the output signals of the flammable gas detectors connects the respective gas detectors for each channel, and displays the gas concentration detected by each gas detector by the respective numerical display means, and whether or not an alarm is applied to the lamp and the buzzer. In addition, it was difficult to easily determine the operating state of each gas detector when dozens of gas detectors were installed.

In addition, the conventional receiving panel merely displays the current operating state of the gas detector connected to each channel, and there is no means for processing and storing a history of past operating states and alarm occurrences. Even when trying to check the status and the occurrence of an alarm, such a post-checking was impossible.

The present invention is to solve the above problems by centrally connecting a plurality of gas detectors installed in a place where there is a risk of leakage of flammable gas and carbon dioxide to display the operation status and alarm occurrence of the gas detectors on a touch screen screen Gas leakage alarm using touch screen to facilitate the management and monitoring of gas detectors and to cope with the risk of gas leakage by storing data on the operation status of gas detectors in memory for future reference It is an object to provide a control system.

Gas leakage alarm control system using a touch screen provided by the present invention in order to achieve the above object is distributed in a place where there is a risk of leakage of flammable gas to measure the concentration of the flammable gas in real time, the measured concentration value One or more gas detectors which are converted into a current signal in a predetermined range and transmitted through a signal wire; A communication controller 40 connected to the gas detectors through a signal wire and collecting output signals of the gas detectors 70a and 70b; The display unit 310 composed of LCD and the input unit 320 integrally installed on the display unit 310 may be pressed to input a command. The data may be input by the data received from the communication controller 40. A touch screen device 30 displaying an operation state of the gas detectors; A programmable logic controller (PLC) connected to the communication controller 40 and outputting a control signal as previously programmed to indicate an alarm state when the concentration of gas detected by the gas detectors exceeds a predetermined alarm level. 41); And an alarm buzzer and a gas leakage alarm lamp operating according to an output control signal of the programmable logic controller 41.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and effect of the gas leakage alarm control system using a touch screen according to the present invention.

1 is a perspective view showing a state of the gas leakage alarm reception control device 1 which is a core of the gas leakage alarm control system using a touch screen according to the present invention installed in the housing 10, Figure 2 is the housing 10 Fig. 3 shows an open state of the door 11, and Fig. 3 shows a front view of the gas leakage alarm reception control device 1.

Gas leakage alarm reception control device 1 of the present invention is installed with the touch screen device 30, the communication controller 40 and a programmable logic controller (PLC) embedded in one enclosure (10). It is preferable.

1 to 3, the touch screen device 30, the communication controller 40, and a programmable logic controller (not shown) are installed in the interior space of the enclosure 10, even when the door 11 is closed. It is possible to see the screen of the touch screen device 30 through the see-through window 13. Various buttons, buzzers and lamps are installed at the upper end of the enclosure 10, which is used to artificially stop the buzzers and lamps to sound an alarm when gas leakage is detected by a signal transmitted from the gas detectors. Buttons. 1 to 3, the main power lamp 21, the alarm buzzer 22, the gas leakage alarm lamp 23, the failure alarm lamp 24, the upper end of the housing 10, The buzzer stop button 25 and the alarm return button 26 are installed.

Meanwhile, the communication controller 40 is connected to a plurality of flammable gas detectors distributed in a place where there is a risk of gas leakage, and collects the signals sent from the gas detectors and transmits them to the touch screen device 30. In charge of work. In FIG. 1 and FIG. 2, reference numeral 45 denotes a signal wire connected to the plurality of gas detectors, and 12 denotes a handle installed in the door 11.

4 is an overall configuration diagram of a gas leakage alarm control system using a touch screen according to the present invention.

Referring to FIG. 4, the gas leakage alarm reception control apparatus 1 includes a touch screen device 30, a communication controller 40, a programmable logic controller 41, and various buzzers, lamps, and switches 220, 230, 240, 250, 260, and 270.

The touch screen device 30 is connected to the communication controller 40 by RS232C line 61, the communication controller 40 is a plurality of combustible gas detectors (70a, 70b, 71a, 71b .. .) And RS485 lines (45, 45a) are connected to receive the signal. In the present invention, the communication controller 40 converts the RS485 type current output signal received from the gas detectors into a RS232C type signal and transmits it to the touch screen device 30, so-called signal converter (signal) Also called converter.

In the present invention, the touch screen device 30 and the communication controller 40 communicates with the Modbus (MODBUS) protocol of the RS232C method, the communication controller 40 and the gas detectors (70a, 70b, 71a, 71b). .) Is characterized by communicating by RS485 Modbus protocol. Modbus is a kind of industrial communication network based on TCP / IP ethernet. Widely used in the sector.

The inventor of the present invention used the ETOS-200 product of AT & T Co., Ltd. as the communication controller 40, which is a product having 16 serial ports and 1 Ethernet port and up to 128 gas detectors. Can connect them. Accordingly, the gas leakage alarm reception control apparatus 1 of the present invention can centrally manage a huge number of gas detectors as compared with a conventional control box or a reception panel.

In FIG. 4, reference numerals 70 and 71 indicate a group of gas detectors, which group a plurality of gas detectors in adjacent positions in a group.

The communication controller 40 receives a current output signal from the plurality of gas detectors 70a, 70b, 71a, and 71b, and outputs an alarm state signal to the programmable logic controller 41 by a control program therein. . In FIG. 4, reference numeral 62 denotes an RS232C line connecting the communication controller 40 and the programmable logic controller 41.

The programmable logic controller 41 is composed of a microprocessor having a control routine that is pre-programmed to take an action such as displaying a gas leakage alarm state or a failure state of a detector or releasing the above alarm state / fault state. The buzzer stop switch 250, the alarm return switch 260, the alarm buzzer 220, the gas leakage alarm lamp 230, the fault alarm lamp 240, and the external output relay (s) by the control output signal of the logic controller 41. The operation state of 270 is changed.

The communication controller 40 receives a 24 VDC power source obtained by rectifying the AC 220V power supply. The AC 220V power supply includes a circuit breaker (MCCB) 4 and a surge pack 401. And it is supplied to the power supply unit 405 through the noise filter 403, is converted into a DC power of 24V in the power supply unit 405 and then supplied to the communication controller 40. In FIG. 4, reference numeral 50b denotes a switch located between the power supply unit 405 and the communication controller 40.

Meanwhile, some of the gas detectors 71a and 71b are connected to the touch screen device 30 by a line 63 having two switches 50a and 50e interposed therebetween, which are switches 50a. When 50e is closed, the output signals of the gas detectors 71a and 71b are directly transmitted to the touch screen device 30 to determine whether the gas detectors normally operate.

Similarly, some of the gas detectors 70a and 70b are also connected to the programmable logic controller 41 by a line 64 with two switches 50c and 50d interposed therebetween. When all of the switches 50c and 50d are closed and the programmable logic controller 41 receives the output signals of the gas detectors 70a and 70b directly, the built-in program detects an alarm state and a failure state. The control unit generates a control signal corresponding thereto and applies the buzzer, the lamps, and the switches 220 to 270.

Only when the output signals of the gas detectors 70a, 70b, 71a, 71b are directly transmitted to the touch screen device 30 and the programmable logic controller 41, the switches 50a, 50c, 50d, 50e are used. Is only when the switch is closed, so that in a typical situation in which the switches remain open, the output signals of the gas detectors are first collected by the communication controller 40 and then transmitted to the touch screen device 30. do.

FIG. 5 illustrates the relationship between the touch screen device 30, the communication controller 40, and the PLC 41 in the system of FIG. Referring to FIG. 5, the touch screen device 30 includes a display unit 310 formed of LCD and an input unit 320 integrally installed on the display unit 310. And an input module 300, and the controller 330 outputs the display contents of the display 310 and receives and processes a command input through the input unit 320. The memory 331 stores data necessary for the operation of the controller 310 and data of detectors transmitted from the communication controller 40 in real time. In addition, the power supply unit 340 serves to supply power required for the operation of the display unit 310 and the control unit 330.

FIG. 6 illustrates a state in which an alarm / bar graph mode is output as an example of a gas detector monitoring system in a display unit of the touch screen device 10 in the gas leakage alarm control system using the touch screen according to the present invention. 7 is an enlarged view of one individual display area 354 in FIG.

6 to 12 all show contents displayed on the screen 35 of the touch screen device 30 shown in FIGS. 1 to 3, and reference numeral 36 denotes a frame of the touch screen device.

Referring to FIG. 6, the upper display area 351 located at the upper portion of the screen 35 of the touch screen device is labeled as “gas detection monitoring system”, and small buttons for selecting the previous and next screens on the left and right sides thereof. Fields 351a and 351b are shown. The touch screen device of the present invention is configured to move to a previous screen and a next screen like a web browser of a personal computer, thereby maximizing user convenience.

On the lower end of the screen 35 of the touch screen device, "detection position # 1" 361, "detection position # 2" 362, "detection position # 3" 363, and "detection position # 4" (364). ), "Alarm / Graph" (365), "Real Time Trend" (366), "History Trend" (367), and "Alarm List" (368). The menu selection buttons are displayed. When clicked, the screen corresponding to the menu is displayed.

FIG. 6 first shows a state in which the "alarm / graph" button 365 is selected from the menus. In this case, “alarm / bar graph” is displayed on the mode display area 353 at the upper left of the touch screen device screen 35, and the entire screen is divided into 3 × 8 shapes. In each divided area 354, data of respective gas detectors is displayed. Through the screen configuration of the touch screen, the operation state of a large number of gas detectors can be easily understood.

In FIG. 6, the check mark 352a at the upper right blinks yellow when the gas detector is checked, the test mark 352b blinks green when the gas detector is tested, and the calibration mark 352c is applied to each gas detector. It is indicated that the light blinks blue when an operation such as calibration by injecting the standard sample gas is performed.

Referring to Fig. 7, each gas detector data display area 354 displays a unique number 354a of each gas detector, and the three lamp displays 354b, 354c, and 354d on the right side of the lamp blink. Each time the gas detector is being checked, tested or calibrated. In the gas leakage amount display field 354e below, the concentration of the gas is expressed as a% LEL value. LEL stands for lower explosive limit, and% LEL stands for the ratio of the current concentration to the lowest explosive limit of the gas, as shown below.

Therefore, the indication of 123% LEL in the gas leakage amount display field 354e in FIG. 7 indicates that a gas concentration corresponding to 123% was detected as compared with the lowest explosion limit concentration of the combustible gas.

Touching (clicking) the numerical part of the gas leakage amount display field 354e of the touch screen displays the gas detector inspection state, and allows testing and calibration. Then, upon completion, the return button 354k may be clicked.

In addition, the bar graph area 354f displays the above concentration values in the form of a bar graph so that users can more easily grasp information on the gas concentration.

To the right of the bar graph area 354f, alarm 1 354g, alarm 2 354h, fault lamp 354i, test button 354j and return button 354k are displayed. In the gas leakage alarm reception control apparatus of the present invention, the alarm according to the gas leakage is set in two stages, so that the alarm 1 is activated when a little leakage occurs, and the alarm 2 is activated when a large leakage occurs. In addition, the test lamp 354j is used to check gas detectors and monitors for abnormalities, and each alarm state and a concentration value (100% LEL) are displayed during the test.

FIG. 8 illustrates a state in which a "real time trend menu" 366 is clicked and a "real time trend graph" is output on the display unit of the touch screen device 10 in the gas leakage alarm control system using the touch screen according to the present invention. .

In the real-time trend graph 370 of FIG. 8, concentration values corresponding to eight gas detectors are displayed in eight colors on a black background in real time, and a data display area 380 of each gas detector is provided on the right side of the screen. In the concentration display field 381 in the data display area 380, the concentration value of each gas detector is numerically displayed.

Below the real-time trend graph 370 of FIG. 8, a negative block button 371a, a roll down button 371b, a roll up button 371c, a plus block button 371d, a graphic return button 371e and a return button ( 371f) is provided. The minus block button 371a functions to scroll by one page in the previous data direction, and the plus block button 371d functions to scroll by one page in the current data direction. The roll down button 371b scrolls and shows data elements one by one in the previous data direction, and the roll up button 371c scrolls and shows data elements one by one in the current data direction. The graphic return button 371e serves to return to the latest graphic display.

FIG. 9 illustrates a state in which a "history trend graph" is outputted on the display unit of the touch screen device 10 by clicking on the "history trend button" 367 in the gas leakage alarm control system using the touch screen according to the present invention. do.

The historical trend graph of FIG. 9 has the same format as the real time trend graph of FIG. 8, except that the historical trend graph is not loaded with real time data, but data that has been processed and stored in memory in the past is loaded and viewed. In the present invention, since the memory 331 embedded in the touch screen device 30 is a flash memory, data is not lost even when the power is turned off. In order to reduce the amount of data, the history trend is preferably recorded only when an alarm (i.e., alarm 1 and alarm 2) occurs.

According to the present invention, the past history data is stored in the memory 331 of the touch screen device 30. Thus, the present invention has the advantage that the past data can be reviewed at any time when necessary to take a post check and measure.

Fig. 10 shows that the "detection position button" 361, 364 is clicked on the display unit of the touch screen device 10 in the gas leakage alarm control system using the touch screen according to the present invention. The output state is shown.

Referring to FIG. 10, the installation positions 371a, 373b ... of each gas detector are displayed according to the map of the site, and the state of each gas detector can be distinguished by the color of the lamp and the blinking state. In other words, if the lamp is displayed in green, it is normal. If the lamp blinks yellow, it indicates that alarm 1 or alarm 2 has occurred, and if it blinks red, it indicates that the gas detector has failed.

FIG. 11 shows a state in which the "alarm list display button" 368 of the menu buttons is clicked so that the "alarm list display mode" is outputted on the display unit of the touch screen device 10. FIG. In the alarm list display area 374, alarm states (alarm 1, alarm 2, failure, check, test, and calibration) generated in each gas detector are displayed, and the generated time and released time are also displayed. In addition, when there are many alarm contents, the previous and current alarms can be viewed using the scroll buttons on the right.

Fig. 12 shows a state in which the operation screens of all the gas detectors are displayed on the display of the touch screen device 10 by clicking on the "alarm screen display button" 369 among the menu buttons.

Referring to FIG. 12, the states of 16 x 8 = 128 gas detectors are displayed on one screen. Therefore, the screen is divided into 128 individual data display areas 376. In each display area 376, a unique number and a gas concentration value for each gas detector are displayed, and an operation state is indicated by a lamp. Is indicated.

Gas leakage alarm control system using a touch screen according to the present invention by centrally connecting a plurality of gas detectors installed in a place where there is a risk of leakage of flammable gas and carbon dioxide to the operation state and whether the alarms of the gas detectors to the touch screen screen At first glance, there is an advantage of facilitating the management and monitoring of a plurality of gas detectors.

In addition, the gas leakage alarm control system using the touch screen according to the present invention stores the historical data related to the alarm occurrence of each gas detector in the memory to be referred to the post-advantage and the advantage to be used for safety measures There is this.

Claims (8)

One or more gas detectors distributed in a place where there is a risk of leakage of flammable gas and measuring the concentration of the flammable gas in real time, and converting the measured concentration value into a current signal in a predetermined range and transmitting the signal through a signal wire; A communication controller 40 connected to the gas detectors through a signal wire and collecting output signals of the gas detectors 70a and 70b; The display unit 310 composed of LCD and the input unit 320 integrally installed on the display unit 310 may be pressed to input a command. The data may be input by the data received from the communication controller 40. A touch screen device 30 displaying an operation state of the gas detectors; A programmable logic controller (PLC) connected to the communication controller 40 and outputting a control signal as previously programmed to indicate an alarm state when the concentration of gas detected by the gas detectors exceeds a predetermined alarm level. 41); And Gas buzzer alarm control system using a touch screen, comprising; alarm buzzer and gas leakage alarm lamp operating in accordance with the output control signal of the programmable logic controller (41). The method of claim 1, wherein the touch screen device 30, A control unit 330 connected to the communication controller 40 by RS232C to communicate; A memory 331 for storing information of the controller 330; And Gas leakage alarm control system using a touch screen further comprises a; power supply unit 340 for supplying power to the control unit (330) and the display unit (320). The display device of claim 2, wherein the control unit 330 of the touch screen device 30 outputs data on the operation state of the gas detectors received from the communication controller 40 to the display unit 310. The entire screen of the screen 310 is divided into a plurality of regions 354 to display the unique display number of each gas detector, the concentration value of the gas detected by each gas detector, an alarm state and a failure status for each of the regions. Gas leakage alarm control system using a touch screen, characterized in that to configure the concentration value of the bar graph (bar graph) to display together. The method of claim 2, wherein the control unit 330 of the touch screen device 30, when the user clicks the "real time trend" button, the data relating to the operation state of the gas detectors received from the communication controller 40 Is configured as a two-dimensional graph of time-concentration and the gas leakage alarm control system using a touch screen, characterized in that to output the real-time trend (trend) of the gas concentrations measured by a plurality of gas detectors to the display unit 310 . The method of claim 2, wherein the control unit 330 of the touch screen device 30 is configured in the form of a two-dimensional graph of time-concentration data on the operation state of the gas detectors received from the communication controller 40 In the memory 331, and when the user clicks the " history trend " button, the past history data of the plurality of gas detectors stored in the memory 331 is loaded and the two-dimensional information regarding the time-concentration. Gas leakage alarm control system using a touch screen, characterized in that the output to the display unit in the form of a graph. The method of claim 2, wherein the control unit 330 of the touch screen device 30, when the user clicks the "detector position" button, the display unit 310 displays the installation position of the gas detector in the form of a map Gas leakage alarm control system using a touch screen, characterized in that for displaying the normal operation of each gas detector and whether the alarm state. The method of claim 2, wherein the control unit 330 of the touch screen device 30 stores the data on whether or not the alarm of the gas detectors in the memory 331, when the user clicks the "alarm list" button , Gas leakage alarm control system using a touch screen, characterized in that for outputting the history of the alarm in the past to the display unit (310). The method of claim 1, wherein the communication controller 40 and the gas detectors (70a, 70b) are connected in an RS485 manner, the communication controller 40 and the programmable logic controller 41 is connected in an RS232C manner. Gas leakage alarm control system using touch screen.

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