Electric circuit information system in explosion-proof area

Abstract

The present invention relates to an electric circuit information system in an explosion-proof area and, more specifically, to an electric circuit information system in an explosion-proof area, which can construct a database by collecting data about equipment information and information of a specific place exposed to the risk of explosion, such as power generation facilities, gases, petrochemicals, offshore plants, and the like, schematize an entire circuit diagram according to information about the constructed database, verify (evaluate) the suitability of an essential safety system for the entire circuit, and diagnose and monitor an electric circuit in the explosion-proof area through failure analysis using sensor data received from a detection unit.

Description

Electrical circuit information system for explosion-proof areas

[0001] The present invention relates to an electrical circuit information system for an explosion-proof area, and more specifically, to an electrical circuit information system for an explosion-proof area capable of diagnosing and monitoring the electrical circuit of the explosion-proof area through fault analysis using sensor data received from a detection unit, and by constructing a database by collecting data on information and equipment information of specific locations exposed to explosion risks, such as power generation facilities, gas, petrochemical, and offshore plants, diagramming the entire circuit diagram according to the constructed database information, verifying (evaluating) the suitability of the intrinsic safety system for the entire circuit.

[0002] Generally, nuclear power, gas, petrochemical, and offshore plants refer to industries that supply facilities or build factories capable of producing products such as electricity, gas, and petrochemicals. They refer to devices, factory facilities, or production facilities that supply raw materials or energy to produce physical and chemical reactions in order to obtain energy. Since plant facilities consist of many important equipment complexly concentrated in a large space, most of them are classified as high-risk facilities.

[0003] Furthermore, since a significant number of domestic plant facilities were constructed in the 1960s and 1970s and are now aging, it can be said that decisions regarding the disposal, repair, or replacement of equipment are urgent. Therefore, as most plant facilities are high-risk facilities containing hazardous substances, continuous monitoring and management are required, and in the event of plant equipment failure or damage, it is necessary to quickly locate the equipment and respond as quickly as possible.

[0004] In particular, high-risk facilities such as nuclear power plants, gas plants, petrochemical plants, and offshore plants must undergo regular preventive maintenance, and since the leakage of gas and chemical substances can cause large-scale fires and explosions, response measures must be taken as soon as possible.

[0005] The countless measuring instruments performing monitoring functions within these high-risk facilities are installed close to piping and equipment, so in the event of a fire or explosion caused by electrical defects or external shocks, they could affect the facilities; therefore, non-explosion-proof monitoring systems cannot be used, and systems are constructed by mounting them in separate explosion-proof enclosures. However, installing them in separate enclosures leads to increased installation costs, weakened competitiveness, and spatial constraints.

[0006] Furthermore, when specific conditions change, such as changes in specific locations or equipment at high-risk facilities or fluctuations in gas usage, these changes must always be reviewed and information updated. If this process is not carried out, resulting in omitted or false information, it can cause explosion accidents.

[0007] Accordingly, to prevent the aforementioned problems and to avoid false entries, omissions due to errors, and individual misjudgments, technology is required for constructing a database based on the collection of information on high-risk facilities, configuring the entire circuit diagram based on the constructed database information, evaluating the suitability of the intrinsic safety system based on the entire configuration, and predicting failure analysis of explosion-proof equipment using measured sensor data.

[0008] Korean published patent [10-2015-0076908] discloses an explosion-proof wireless data measurement system.

[0009] Korean registered patent [10-2517384] discloses a smart platform for explosion-proof inspection at industrial sites.

[0010] Accordingly, the present invention has been devised to solve the problems described above. The objective of the present invention is to provide an electrical circuit information system for an explosion-proof zone capable of diagnosing and monitoring the electrical circuits of the explosion-proof zone through fault analysis using sensor data received from a detection unit, and by constructing a database by collecting data on information and equipment information of specific locations exposed to explosion risks, such as power generation facilities, gas, petrochemical, and offshore plants; diagramming the entire circuit diagram based on the constructed database information; verifying (evaluating) the suitability of the intrinsic safety system for the entire circuit.

[0011] The purposes of the embodiments of the present invention are not limited to those mentioned above, and other unmentioned purposes will be clearly understood by those skilled in the art from the description below.

[0012] An electrical circuit information system for an explosion-proof zone according to an embodiment of the present invention for achieving the above-mentioned purpose comprises: an interface unit (10) that receives information regarding an explosion-proof inspection through a terminal; an output unit (20) that processes the information received from the interface unit and outputs it to the terminal; a database management unit (30) that stores information necessary for performing an explosion-proof inspection and information regarding the electrical circuit of the explosion-proof zone; a control unit (40) for controlling the flow of data with the terminal; an inspection unit (50) that performs a function to support the inspection of explosion-proof equipment; a danger zone setting unit (60) that determines the grade and range of the explosion danger zone; an installation design support unit (70) that enables the installation of explosion-proof equipment based on the equipment ID registered in the database management unit, the explosion danger zone grade determined by the danger zone setting unit, the gas group, and the temperature grade; a field installation support unit (80) that determines suitability by comparing the result output from the installation design support unit with the information of the installed explosion-proof equipment; and an approval unit (90) for granting permission for the installation or inspection of explosion-proof equipment. and includes a circuit diagramming unit (100) for diagramming and configuring electrical circuits for all equipment at the site stored in the database management unit.

[0013] The above circuit diagram unit (100) is characterized by outputting an object window (31) in which a list of equipment provided at the corresponding site is displayed hierarchically, a circuit diagram window (32) in which connection information of electricity and signals of all equipment is displayed, and a data window (33) in which data stored for selected equipment (object) is displayed, wherein the data window is characterized by displaying connection information, history, and status information at the core unit level of the wire.

[0014] The electrical circuit information system of the explosion-proof zone described above is characterized by further including an intrinsic safety evaluation unit (200) for evaluating the suitability of an intrinsic safety system based on explosion-proof type and explosion-proof information for an associated apparatus in a safety zone connected via a cable to a field equipment provided in the explosion-hazard zone.

[0015] The intrinsic safety evaluation unit (200) is characterized by identifying the connection structure of the intrinsic safety system from the connection configuration of the entire electrical circuit configured by the circuit diagram unit and evaluating suitability, and the intrinsic safety system includes one piece of equipment provided in the explosion risk zone, the cable, and a protective equipment in the safety zone connected to one piece of equipment provided in the explosion risk zone, and is characterized by checking the protection level of one piece of equipment provided in the explosion risk zone and the protective equipment in the safety zone connected to each other, and determining whether the equipment is provided in the correct zone using a lookup table.

[0016] The electrical circuit information system of the explosion-proof area described above is characterized by further including a sensing unit (301) for measuring current data and vibration data for equipment; and a diagnosis and monitoring unit (302) for diagnosing and monitoring the condition of the equipment using the current data and vibration data measured by the sensing unit (301).

[0017] The above diagnosis and monitoring unit (302) is characterized by initially receiving basic data of a normal state for machine learning, and the process of registering basic data of a normal state is characterized by receiving current data and vibration data measured at preset time intervals, performing a Fast Fourier Transform (FFT) on each data to convert it into each frequency component according to time, normalizing it to represent it as a ratio to the fundamental wave determined by the power frequency, performing regression analysis and normal distribution analysis on each frequency component to define the normal range of the current data and vibration data, and performing an alert function when data exceeding the normal range is detected after the registration of basic data of a normal state.

[0018] The above diagnosis and monitoring unit (302) is characterized by setting a side band area for the measured current data, performing regression analysis and normal distribution analysis only on the data within the frequency range of the set side band area, and performing an alert function when data exceeding the normal range is detected.

[0019] The above diagnosis and monitoring unit (302) is characterized by performing regression analysis and normal distribution analysis only on data within a preset frequency range centered on the fault detection frequency for the measured vibration data, and performing an alert function when data exceeding the normal range is detected.

[0020] The above diagnosis and monitoring unit (302) is characterized by accumulating the frequency components of the data in which a notification situation occurs and performing regression analysis, and performing a notification function when the function according to the regression analysis deviates from the normal state reference function range.

[0021] According to an electrical circuit information system for an explosion-proof area in accordance with one embodiment of the present invention, a database is constructed by collecting data on information and equipment information of specific locations exposed to explosion risks, such as power generation facilities, gas, petrochemical, and offshore plants; an overall circuit diagram is diagrammed based on the constructed database information; the suitability of the intrinsic safety system for the entire circuit is verified (evaluated); and diagnosis and monitoring of the electrical circuit in the explosion-proof area are possible through fault analysis using sensor data received from a detection unit.

[0022] In addition, according to an electrical circuit information system for an explosion-proof area according to one embodiment of the present invention, by systematizing and establishing information regarding explosion risk factors, it prevents false information entry, omission or misjudgment due to error, and furthermore, by enabling rapid updates when setting up explosion-risk locations or changing equipment, it possesses a significant effect of preventing safety accidents in advance.

[0023] In addition, according to an electrical circuit information system for an explosion-proof zone according to one embodiment of the present invention, by determining the grade and range of the explosion risk zone in a flammable gas and dust environment, the explosion risk zone grade is determined, and the danger zone distance is output and notified, thereby possessing a significant effect of identifying the explosion risk zone.

[0024] In addition, according to an electrical circuit information system for an explosion-proof zone according to one embodiment of the present invention, by setting the explosion-proof grade of equipment installed in the explosion-proof zone and allowing the installation procedure to be carried out by comparing it with the installation regulations at the site, it has a significant effect of determining whether the equipment is suitable for installation in the explosion-proof zone.

[0025] FIG. 1 is a configuration diagram of an electrical circuit information system of an explosion-proof area according to one embodiment of the present invention.

[0026] FIG. 2 is a configuration diagram showing the approval procedure that must be obtained when work is performed at a site using an electrical circuit information system of an explosion-proof area according to one embodiment of the present invention.

[0027] FIG. 3 is an exemplary drawing for explaining a user interface (UI) output through the circuit diagram section of FIG. 1.

[0028] FIG. 4 is a configuration diagram showing an example in which an intrinsic safety evaluation section is further added to FIG. 1.

[0029] FIG. 5 is a drawing illustrating an intrinsic safety evaluation unit of an electrical circuit information system of an explosion-proof area according to an embodiment of the present invention.

[0030] FIG. 6 is a table for explaining a lookup table used when determining conformity in the intrinsic safety evaluation unit of an electrical circuit information system of an explosion-proof area according to an embodiment of the present invention.

[0031] FIG. 7 is a configuration diagram showing an example in which a sensing unit and a diagnostic and monitoring unit are further added to FIG. 1.

[0032] FIG. 8 is a table for explaining the side bands of current data to reduce the amount of calculation in the diagnosis and monitoring unit of an electrical circuit information system of an explosion-proof area according to one embodiment of the present invention.

[0033] FIG. 9 is a table for explaining the fault determination frequency range of vibration frequencies to reduce the amount of calculation in the diagnosis and monitoring unit of an electrical circuit information system of an explosion-proof area according to one embodiment of the present invention.

[0034] *Detailed explanation of the main symbols in the drawing*

[0035] 10: Interface section 20: Output section

[0036] 30: Database Management Unit 40: Control Unit

[0037] 50: Inspection Section 60: Danger Zone Setting Section

[0038] 70: Installation Design Support Department 80: Field Installation Support Department

[0039] 90: Approval Section 100: Circuit Diagram Section

[0040] 200: Intrinsic Safety Assessment Department

[0041] 301: Detector

[0042] 302: Diagnosis and Monitoring Department

[0043] The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the invention to specific embodiments, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention.

[0044] When it is stated that one component is "connected" or "joined" to another component, it should be understood that while it may be directly connected or joined to that other component, there may also be other components in between.

[0045] On the other hand, when it is stated that one component is "directly connected" or "directly coupled" to another component, it should be understood that there are no other components in between.

[0046] The terms used in this specification are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, terms such as “comprising” or “having” are intended to specify the existence of the features, numbers, processes, operations, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, processes, operations, components, parts, or combinations thereof.

[0047] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0048] The present invention will be described in more detail below with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings. Based on the principle that the inventor can appropriately define the concepts of terms to best describe their invention, they should be interpreted in a meaning and concept consistent with the technical spirit of the present invention. Furthermore, unless otherwise defined, technical and scientific terms used shall have the meaning commonly understood by those skilled in the art to which this invention pertains. Descriptions of known functions and configurations that could unnecessarily obscure the essence of the present invention in the following description and attached drawings are omitted. The drawings presented below are provided as examples to ensure that the spirit of the present invention is sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below and may be embodied in other forms. Additionally, throughout the specification, the same reference numerals indicate the same components. It should be noted that the same components in the drawings are represented by the same reference numerals wherever possible.

[0049] Before proceeding with the explanation, the terms used in this specification (and claims) will be briefly explained.

[0050] The 'User' is a person in charge or manager of a site and can perform explosion-proof safety management through the electrical circuit information system of an explosion-proof area according to one embodiment of the present invention, and for this purpose, an account is assigned to the electrical circuit information system of an explosion-proof area according to one embodiment of the present invention.

[0051] Basic terms have been summarized, but not all terms necessary for the explanation have been included; any new variables and terms appearing in addition to those defined above will be explained later.

[0052] FIG. 1 is a configuration diagram of an electrical circuit information system for an explosion-proof area according to one embodiment of the present invention, and FIG. 2 is a configuration diagram showing the approval procedure that must be obtained when work is performed at a site using the electrical circuit information system for an explosion-proof area according to one embodiment of the present invention.

[0053] As illustrated in FIG. 1, an electrical circuit information system for an explosion-proof area according to one embodiment of the present invention includes an interface unit (10), an output unit (20), a database management unit (30), a control unit (40), an inspection unit (50), a danger zone setting unit (60), an installation design support unit (70), a field installation support unit (80), an approval unit (90), and a circuit diagram unit (100).

[0054] The interface unit (10) receives information regarding the explosion-proof inspection through a terminal.

[0055] The interface section (10) allows various information, such as paths, history of equipment, and inspection reports, to be entered through a terminal.

[0056] The output unit (20) processes information input from the interface unit (10) and outputs it to the terminal. The output unit (20) performs the function of delivering information to the user by allowing various information, such as routes, history of equipment, and inspection reports, to be output through the terminal.

[0057] At this time, the output unit (20) can be configured to provide notification through various configurations such as vibration, LED, speaker, display, etc.

[0058] The database management unit (30) stores information necessary for performing explosion-proof inspections.

[0059] The database management unit (30) stores information necessary for performing explosion-proof inspections, such as information about specific locations like maps of explosion-hazardous zones or the structure (space) of buildings, and information about specific equipment such as the name, manufacturer, installation time, and replacement cycle of equipment.

[0060] It is desirable that the database management unit (30) updates the stored information in real time, and that the information entered through the interface unit (10) is updated and stored.

[0061] At this time, the terminal can be configured to determine whether there has been input of information that is updated in real time.

[0062] For example, based on information about a specific location stored in the database management unit (30), after detecting a change in the terminal's location via GPS, and inferring whether an inspection was conducted at the location where the terminal stayed for a certain period of time, if it is determined that an inspection was conducted, it is possible to check whether the content of the inspection result was updated in real time through the interface unit (10), thereby confirming whether there was a missing information update after the inspection.

[0063] That is, if the database management unit (30) is not updated in real time after an inspection of specific equipment at a specific location, it is considered that the content regarding the inspection has not been updated, and the user is notified through the output unit (20), thereby preventing omissions due to information updates.

[0064] Here, inferring whether an inspection was performed at a place where the terminal (100) stayed for a certain period of time means the time learned through a deep learning algorithm.

[0065] To elaborate, the movement of the terminal is detected by GPS, and the time the terminal remains at a specific location where specific equipment is installed is detected. In this case, if the time the terminal remained (the time it was stationary without moving) is longer than the minimum time required to inspect specific equipment at the specific location, it can be inferred that the inspection of the equipment has been performed.

[0066] In other words, if the terminal stays in a specific location for a longer period than the minimum time required for inspection, it is assumed that an inspection of the specific equipment has been performed; by determining whether a real-time update is being performed, the problem of inspection results not being updated can be prevented.

[0067] The control unit (40) controls the flow of data with the terminal.

[0068] The control unit (40) is for controlling the flow of data between the terminal and the electrical circuit information system of the explosion-proof zone according to one embodiment of the present invention, and performs the control function of the entire electrical circuit information system of the explosion-proof zone according to one embodiment of the present invention.

[0069] The inspection unit (50) performs the function of supporting the inspection of explosion-proof equipment.

[0070] The inspection unit (50) performs the function of supporting inspection of specific areas and equipment.

[0071] The danger zone setting unit (60) determines the danger zone class and range of the explosion.

[0072] The danger zone setting unit (60) performs the function of determining the grade and range of the danger zone for explosion in a combustible gas and dust environment, and can determine the dilution grade, determine the grade of the explosion-proof zone, and output the danger zone distance through the output unit (20).

[0073] First, identify the locations where flammable gas is used and the sources of leakage within the explosion hazard zone, and detect the amount of gas leakage at the leak site.

[0074] The installation design support unit (70) enables the installation of explosion-proof equipment based on the equipment ID registered in the database management unit (30), the explosion risk zone class determined by the risk zone setting unit (60), the gas group, and the temperature class.

[0075] The installation design support unit (70) performs the function of supporting the installation of equipment within the explosion-proof area so that the installation of the equipment can be done correctly.

[0076] At this time, it is preferable that information about the equipment to be installed in the explosion hazard zone be registered in the database management unit (30), and furthermore, each piece of equipment may be assigned an individual ID and cable connection information may be stored together.

[0077] This allows the user to determine whether the equipment can be installed in a specific explosion-hazardous area or whether the rate of safety accidents is high or low by ensuring that the electrical and communication circuit diagrams of the equipment are displayed together when the user wants to view the equipment ID through a terminal.

[0078] The field installation support unit (80) determines suitability by comparing the result output from the installation design support unit (70) with the information of the installed explosion-proof equipment.

[0079] The field installation support unit (80) performs the function of supporting the field installation of explosion-proof equipment.

[0080] This allows for real-time inspection to be performed to ensure that the equipment is installed correctly during actual equipment installation, in conjunction with the installation design support unit (70).

[0081] At this time, customized information can be provided based on the ID of the equipment selected through the terminal to ensure that installation is carried out in compliance with electrical safety standards, construction regulations, explosion-proof regulations, etc., which are items to be considered.

[0082] For example, if a user wants to install equipment in an explosion-hazardous zone, the installation can be carried out by receiving information through the field installation support unit (80), thereby enabling real-time inspection.

[0083] At this time, in order to determine whether there were any omissions in verifying the actual equipment ID or information, or whether the equipment was installed correctly, the user may use a terminal to register and inspect the installed equipment from the RFID tag, and have an installation report printed accordingly.

[0084] In addition, when the cable information of the installed equipment is entered, it can be configured to determine suitability by comparing it with the information provided by the installation design support unit (70).

[0085] The approval department (90) authorizes the installation or inspection of explosion-proof equipment.

[0086] The approval unit (90) enables approval from the electrical circuit information system of the explosion-proof area according to one embodiment of the present invention when various operations are performed by a user who owns a terminal at the site, and has a function for granting permission for the installation or inspection of equipment.

[0087] Referring to FIG. 2, this approval unit (90) is configured to ensure that the installation, inspection, maintenance, or repair of equipment is carried out only after approval of the electrical circuit information system of the explosion-proof area according to one embodiment of the present invention is obtained, and to notify when work is performed without approval.

[0088] This is because if various operations are performed without approval, information updates may be omitted, and if the actual equipment history differs from the data history information, safety accidents may easily occur; therefore, to prevent this, it is desirable to ensure that operations are performed only after approval is obtained from the electrical circuit information system of the explosion-proof area according to one embodiment of the present invention prior to the work.

[0089] For example, to approve a task, the inspection cycle of the relevant equipment is identified, and after determining whether the equipment falls within the inspection cycle, the user is notified of this via a terminal, thereby enabling the task approval process to take place.

[0090] Depending on the design conditions, the approval unit (90) can be configured to allow the user to obtain approval for the start of the work before the work, and to obtain approval once more when the work is completed so that the user's work start time, end time, and data regarding the work content are correctly updated.

[0091] The circuit diagramming unit (100) is configured by diagramming the electrical circuits for all equipment at the corresponding site stored in the database management unit (30).

[0092] The electrical circuit configured in the above circuit diagramming unit (100) is output to the user's terminal.

[0093] For safety management of explosion hazard zones, the electrical and signal interconnection information of electrical equipment installed at the site is displayed as an image-based overall circuit diagram.

[0094] Registered equipment is displayed as an image on the screen, and when electrical and signal connection information is received through the user's terminal, it is recorded in the database and converted into text data.

[0095] Conventionally, electrical single-line diagrams are managed and used as printouts or PDF files. However, since they are single-line diagrams, it is difficult to identify connection information at the core level of the wires. In contrast, the electrical circuit information system for explosion-proof zones according to the present invention establishes the relevant parts as a database, allowing for immediate verification of related information by clicking on the corresponding object, making it effective and accurate.

[0096] In other words, when a user clicks on an object in a circuit diagram on a web screen or mobile app screen via a terminal, they can check all the information, history, and status (normal, faulty, deteriorated) of the corresponding object stored in the database.

[0097] The user interface (UI) is configured as shown in Fig. 3, so that when an object is clicked on the schematic (circuit diagram), the contents of the database appear at the bottom.

[0098] FIG. 3 is an exemplary drawing for explaining a user interface (UI) output through the circuit diagram section of FIG. 1.

[0099] As illustrated in FIG. 3, the user interface (UI) includes an object window (31) in which a list of equipment provided at the site is displayed hierarchically, a circuit diagram window (32) in which electrical and signal connection information of all equipment is displayed, and a data window (33) in which data stored for the selected equipment (object) is displayed.

[0100] In the above data window (33), connection information, history, and status information of the core unit of the wire are displayed.

[0101] Meanwhile, connection information for electricity and signals can also be received from a user terminal through the above-mentioned user interface (UI).

[0102] In Fig. 3, when the object is clicked, it is linked with a device status diagnosis and monitoring system to output signals from sensors installed in the device or location, display the trends as a graph, and calculate and provide the explosion risk of the location.

[0103] The above explosion risk is provided by calculating and identifying risks through the inspection history of the equipment (device), analysis of sensor data, and data pattern analysis using machine learning.

[0104] Meanwhile, explosion-proof requirements for the installation environment of the equipment (device), as well as the explosion-proof type and class of the equipment (device), are registered and managed in a database, and an alarm function can be performed if data exceeding the boundaries of non-compliance with explosion-proof requirements is identified by analyzing inspection records and sensor data.

[0105] Figure 4 is a configuration diagram showing an example in which an intrinsic safety evaluation unit is further added to Figure 1.

[0106] As illustrated in FIG. 4, an electrical circuit information system for an explosion-proof zone according to one embodiment of the present invention further includes an intrinsic safety evaluation unit (200) for evaluating the suitability of an intrinsic safety system based on explosion-proof type and explosion-proof information for an associated apparatus in a safety zone connected via a cable to a field equipment provided in an explosion-hazardous zone.

[0107] The intrinsic safety evaluation unit (200) identifies the connection structure of the intrinsic safety system from the connection configuration of the entire electrical circuit configured by the circuit diagram unit (100) and performs a conformity evaluation.

[0108] Meanwhile, the basic concept of intrinsic safety (IS) is a low-energy signaling technology that prevents explosions by ensuring that the energy delivered to the hazardous area is much lower than the energy required to initiate an explosion. It is a method of controlling the ignition source among the three elements of an explosion—ignition source, oxygen, and fuel—and is based on the principle of preventing ignition even in abnormal operating conditions by using an energy level that is too weak to cause ignition.

[0109] Weak energy refers to energy sufficient that, even if the two mechanisms capable of causing an explosion—sparks and hot surfaces—are generated, it does not react with surrounding hazardous gases and dust to cause an explosion. Generally, the current is 100mA and the voltage is 24V DC or less.

[0110] A circuit can be considered inherently safe if, under certain conditions, sparks or heat cannot ignite an explosive atmosphere. These conditions include both normal operation and specific fault modes.

[0111] FIG. 5 is a drawing illustrating the intrinsic safety evaluation section of an electrical circuit information system of an explosion-proof area according to one embodiment of the present invention.

[0112] Unlike other protection types, the intrinsically safe system includes equipment (501) (FE: Field Equipment) provided in a hazardous area, an associated device (protective equipment) (505) (AA: Associated Apparatus) in a safe area connected to the equipment (FE), and a cable (503) and a multicore cable (504) provided between the equipment (501) and the associated device (protective equipment) (505). In some cases, the connection process of the cable (503) and the multicore cable (504) may pass through a junction box (502).

[0113] The intrinsic stability evaluation unit (200) compares the explosion-proof design and construction errors of the intrinsically safe explosion-proof system that may occur in the electrical circuit connection structure with the contents of the database registered in the electrical circuit identification and the rules of the explosion-proof standard, and issues and registers a warning if an unsuitable item is calculated (judged).

[0114] For devices other than intrinsically safe devices, the applicability according to the explosion-proof zone grade is determined based on the certified explosion-proof type and information of the corresponding device. Therefore, the conformity assessment algorithm is configured with a logic that compares the explosion-proof information of the area with the equipment. However, in an intrinsically safe system, the safety grade is determined by combining the equipment (FE) with the corresponding related device (protective equipment) (505). Therefore, there are limitations to identifying by operating software in the conventional manner.

[0115] That is, the electrical circuit information system of an explosion-proof area according to the present invention automatically identifies connection information by configuring electrical circuit information through a circuit diagramming unit (100). If there is a junction box in the middle, connection identification is performed in two stages. This is performed by the internal connection information database of the junction box. In this way, the connection structure of the intrinsically safe system is identified, and the entire connected configuration is recognized as the intrinsically safe system. For the system recognized in this way, a lookup table is embedded in the algorithm and compared with the information of the explosion-proof environment to be installed to calculate suitability. If non-suitability is found, a warning can be issued.

[0116] Explosion hazard zone information may include explosion hazard zone class information, gas information may include gas group information, dust information may include dust group information, and temperature information may include temperature class (T-Class) information.

[0117] Explosion hazard zone classification information can be divided into Zone 0, Zone 1, Zone 2, Safe area, Zone 20, Zone 21, Zone 22, etc. according to IEC classification standards.

[0118] Gas group information can be classified into IIA, IIB, IIC, etc., depending on the flammability of the material.

[0119] Dust group information can be classified into IIIA, IIIB, IIIC, etc., depending on the combustible materials in the environment.

[0120] Explosion-proof equipment information may include Equipment Protection Level (EPL) information, and EPL information can be classified into Ga, Gb, Gc, Da, Db, Dc, N / A, etc.

[0121] The protection levels based on EPL (Equipment Protection Level) information are classified into ia, ib, and ic.

[0122] FIG. 6 is a table for explaining a lookup table used when determining conformity in the intrinsic safety evaluation unit of an electrical circuit information system of an explosion-proof area according to one embodiment of the present invention.

[0123] In the table, FE is an abbreviation for Field Equipment, which is equipment (501) in the danger zone, and AA is an abbreviation for Associated Apparatus, which is related equipment (505) in the safety zone.

[0124] As shown in Fig. 6, the protection level of each FE and AA combined with each other is checked to determine whether the equipment is installed in the appropriate zone.

[0125] For example, if FE is ia and AA is ic, the corresponding explosion risk zone grades are Zone 2 and Safe area.

[0126] Figure 7 is a configuration diagram showing an example in which a sensing unit and a diagnostic and monitoring unit are further added to Figure 1.

[0127] As illustrated in FIG. 7, an electrical circuit information system for an explosion-proof area according to one embodiment of the present invention includes a sensing unit (301) for measuring current data and vibration data for equipment, and a diagnosis and monitoring unit (302) for diagnosing and monitoring the condition of the equipment using the current data and vibration data measured by the sensing unit (301).

[0128] The above detection unit (301) includes a plurality of sensors. For example, it may include a vibration sensor, a current sensor (CT), a temperature sensor (equipment), a spatial environment sensor (temperature, humidity, gas), and a hazard detection sensor (gas sensor, smoke sensor, flame detection sensor).

[0129] The above diagnosis and monitoring unit (302) can receive high-speed sampling data from the above detection unit (301), calculate physical quantities, and display them on an electrical circuit diagram.

[0130] Temperature sensor data measured by the temperature sensor is received and displayed at set time intervals. It learns temperature data patterns to continuously collect and define normal state data, and issues an alarm through machine learning when data deviating from this pattern is received.

[0131] Current sensor (CT) data measured by the current sensor is used to calculate high-speed sampling data and display the RMS value, peak value, and trend. By performing frequency component analysis of the current data to identify side bands, an alarm can be issued when a fault is predicted.

[0132] Vibration sensor data measured by the vibration sensor displays the RMS value and trend by calculating high-speed sampling data. By performing frequency component analysis of the vibration sensor data, an alarm can be issued when a fault is predicted.

[0133] The vibration sensor data described above continuously learns normal data through machine learning to continuously update the definition of the normal state. An alarm is issued if the pattern is deviated from. In particular, this machine learning process faces difficulties in vibration detection when the target motor is affected by vibrations from surrounding equipment; however, if fluctuations caused by surrounding devices during operation are registered as a normal state, the fault diagnosis criteria can be updated to reflect this.

[0134] The operation history of the device is recorded by analyzing vibration and current sensor data. This record quantifies how long the device has operated; if this figure increases, the device is determined to have been in use for a long time and is added to the risk when calculating the risk level. Additionally, fault events (such as trips and protective device activations) are analyzed and recorded through data patterns. Instead of simply the device's years of service, maintenance directions can be proposed using operation time and trip event history as input data. These maintenance directions include proposals for continued use, detailed inspection, shutdown, repair, or replacement.

[0135] The above diagnosis and monitoring unit (302) initially receives basic data of a normal state for machine learning.

[0136] The above-described normal state basic data registration process involves receiving current and vibration data measured at preset time intervals, performing a Fast Fourier Transform (FFT) on each data point to convert them into frequency components over time, normalizing them to represent the ratio to the fundamental frequency determined by the power supply frequency, and arranging these frequency components according to time. The frequency components are then arranged to record them as time-dependent data. This initial recording is performed for a specified period after installation. Once the data alignment is complete, regression analysis is conducted on the trends of each frequency component. Additionally, the data is reordered and expressed as time (retrieval)-frequency components, and a normal distribution analysis is performed on each frequency component. In other words, regression and normal distribution analyses are performed on each frequency component to define the normal range of the current and vibration data. After the registration of the normal state basic data, if data exceeding this normal range is detected, an alert function is executed.

[0137] For example, the normal range can be defined based on Z=3 and P-value 0.05 through regression analysis and normal distribution analysis.

[0138] In other words, basic data is registered to execute machine learning, and data input or collected and recorded under normal conditions is registered as normal to determine the normal range. Subsequently, if inspection results or sensor signals deviate from this range, an initial notification is issued to suggest conducting a detailed inspection.

[0139] The sequence of the algorithm for analyzing detection data (sensor data) in the above diagnosis and monitoring unit (302) is as follows.

[0140] 1) Real-time data measurement at specified time intervals

[0141] 2) Perform Fast Fourier Transformation (FFT) on each data point

[0142] 3) Generate a matrix by converting data based on each frequency segment and time (repetition).

[0143] 4) Definition of the fundamental component for each frequency component

[0144] 5) Update the matrix by calculating the normalization of each frequency component for the fundamental component.

[0145] 6) Regression analysis of each frequency component according to time (repeated times) (2nd and 3rd degree functions)

[0146] 7) Analysis of normal distribution and analysis of variance of each frequency component according to time (repetitions)

[0147] 8) Calculate the regression equation range considering normal distribution and variance, and designate and register as normal data

[0148] 9) Notification if a deviation of the frequency component of the measured data from the normal range is detected while the equipment is operating

[0149] FIG. 8 is a table for explaining the side band of current data to reduce the amount of calculation in the diagnosis and monitoring unit of an electrical circuit information system of an explosion-proof area according to one embodiment of the present invention, and FIG. 9 is a table for explaining the fault detection frequency range of vibration frequency to reduce the amount of calculation in the diagnosis and monitoring unit of an electrical circuit information system of an explosion-proof area according to one embodiment of the present invention.

[0150] The above analysis algorithm method may require somewhat large computational resources. To address this, the present invention can reduce the amount of computation by applying an adaptive analysis algorithm. This method does not analyze all frequency components but applies it only to specific frequencies.

[0151] To achieve this, the amount of data is reduced by defining the current data as a side band area and the vibration frequency as a fault detection frequency area.

[0152] 1) Current data

[0153] For current data, the side band (F) is calculated using the following [Equation 1] bb1 Specifies ).

[0154] [Mathematical Formula 1]

[0155] F bb1 = (1 ± 2ks) × f

[0156] Here, F bb1 is the side band, k is a constant, s is the slip, and f is the power frequency.

[0157] Among the components obtained from the frequency analysis results, data is taken only for the side band calculated using the above [Equation 1], and the rest are not stored.

[0158] For example, as shown in Fig. 8, for a 60 Hz 4-pole motor with a slip of 0.12, only data within the ±5 Hz range is processed by considering k up to 2. That is, only frequency component data within the ranges of 45.6 Hz ± 5 Hz, 31.2 Hz ± 5 Hz, 74.4 Hz ± 5 Hz, and 88.8 Hz ± 5 Hz is processed.

[0159] On the other hand, if more accurate analysis is required, the entire data is processed and analyzed rather than using adaptive computation algorithms to reduce computational resources.

[0160] 2) Vibration data

[0161] In the case of vibration data, the amount of computation can be reduced by sampling and processing only the frequency component data within a preset range (e.g., ±10Hz range) based on the fault detection frequency according to the cause of vibration.

[0162] Figure 9 shows an example of a fault detection frequency according to the cause of vibration.

[0163] Meanwhile, the above diagnosis and monitoring unit (302) may use a cumulative data analysis method for improving false notifications.

[0164] Under normal circumstances, measured data fluctuates. That is, large values ​​may be entered due to noise, or data that has changed due to temporary external environmental factors may be received. However, if notifications are triggered by comparing such highly variable data with a reference value, the probability of an alert occurring even in a normal state increases. To solve this, the electrical circuit information system for an explosion-proof area according to the present invention utilizes accumulated data.

[0165] While immediate action is taken for severe failure levels, regression analysis is performed by accumulating the frequency components of the relevant data to eliminate notification situations caused by temporary deviations from the data range (exceeding or falling below). If the function resulting from the above regression analysis falls outside the range of the normal state reference function, a notification function is triggered.

[0166] The present invention is not limited to the embodiments described above, and its scope of application is diverse. Furthermore, it is understood that various modifications are possible without departing from the essence of the invention as claimed in the claims.

Claims

1. In an electrical circuit information system for an explosion-proof area, Interface unit (10) that receives information regarding explosion-proof inspection through a terminal; An output unit (20) that processes information input from the above interface unit and outputs it to the terminal; A database management unit (30) that stores information necessary for performing explosion-proof inspection and information about electrical circuits in explosion-proof areas; A control unit (40) for controlling the flow of data with the above terminal; An inspection unit (50) that performs a function to support inspection of explosion-proof equipment; A danger zone setting unit (60) that determines the grade and range of the danger zone for explosions; Installation design support unit (70) that enables the installation of explosion-proof equipment based on the ID of the equipment registered in the above database management unit, the explosion risk zone class determined by the above risk zone setting unit, the gas group, and the temperature class; Field installation support unit (80) that determines suitability by comparing the output from the above-mentioned installation design support unit with the information of the installed explosion-proof equipment; Approval section (90) for permission to install or inspect explosion-proof equipment; and A circuit diagramming unit (100) for diagramming and configuring electrical circuits for all equipment at the site (site) stored in the database management unit above. An electrical circuit information system for an explosion-proof area including 2. In Paragraph 1, The above circuit diagram unit (100) is, The present invention is characterized by outputting an object window (31) in which a list of equipment provided at the above-mentioned site is displayed hierarchically, a circuit diagram window (32) in which electrical and signal connection information of all equipment is displayed, and a data window (33) in which data stored for the selected equipment (object) is displayed. An electrical circuit information system for an explosion-proof area, characterized in that the above data window displays connection information, history, and status information at the core unit level of the wire.

3. In Paragraph 1, An intrinsic safety evaluation unit (200) for evaluating the suitability of an intrinsic safety system based on explosion-proof type and explosion-proof information for a safety zone protection device (Associated Apparatus) connected via a cable to a field equipment installed in an explosion-hazardous zone. An electrical circuit information system for an explosion-proof area characterized by further including 4. In Paragraph 3, The above intrinsic safety evaluation unit (200) is, It is characterized by identifying the connection structure of the intrinsically safe system from the connection configuration of the entire electrical circuit configured in the circuit diagram section above and evaluating its suitability. The intrinsically safe system comprises any one of the equipment provided in the explosion risk zone, the cable, and protective equipment of the safety zone connected to any one of the equipment provided in the explosion risk zone. An electrical circuit information system for an explosion-proof zone characterized by verifying the protection level of any one piece of equipment installed in the explosion-hazard zone connected to the above and the protective equipment in the above safety zone, and using a lookup table to determine whether the equipment is installed in the correct zone.

5. In Paragraph 1 or 3, A sensing unit (301) for measuring current data and vibration data for equipment; and A diagnosis and monitoring unit (302) for diagnosing and monitoring the condition of the equipment using current data and vibration data measured by the above-mentioned detection unit (301) An electrical circuit information system for an explosion-proof area characterized by further including 6. In Paragraph 5, The above diagnosis and monitoring unit (302) is, It is characterized by receiving basic steady-state data for machine learning in the initial stage, and The above process for registering basic data of the steady state involves receiving current data and vibration data measured at preset time intervals, performing a Fast Fourier Transform (FFT) on each data point to convert them into frequency components over time, normalizing them to represent the ratio to the fundamental wave determined by the power supply frequency, and performing regression analysis and normal distribution analysis on each frequency component to define the normal range of the said current data and vibration data. An electrical circuit information system for an explosion-proof area characterized by performing a notification function when data exceeding the normal range is detected after the registration of the basic data of the normal state.

7. In Paragraph 6, The above diagnosis and monitoring unit (302) is, An electrical circuit information system for an explosion-proof area characterized by setting a side band area for measured current data, performing regression analysis and normal distribution analysis only on data within the frequency range of the set side band area, and performing an alert function when data exceeding the normal range is detected.

8. In Paragraph 6, The above diagnosis and monitoring unit (302) is, An electrical circuit information system for an explosion-proof area characterized by performing regression analysis and normal distribution analysis only on data within a preset frequency range centered on the fault detection frequency for measured vibration data, and performing an alert function when data exceeding the normal range is detected.

9. In Paragraph 6, The above diagnosis and monitoring unit (302) is, An electrical circuit information system for an explosion-proof area characterized by accumulating frequency components of data where a notification situation occurs to perform regression analysis, and performing a notification function when the function according to the regression analysis deviates from the normal state reference function range.

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