KR20210051400A - Automatic fire detection system based on internet of thing - Google Patents

Abstract

Provided is an IoT-based automatic fire detection system, which continues operation even when an error such as poor connection or disconnection occurs, precisely specifies a point where the error occurs, and prevents loss of measured data. The system includes: a detection unit including a sensor module equipped with a plurality of sensors for fire detection; and a receiver for receiving the data detected from the detection unit. In the detection unit, a plurality of sensor modules are linked to each other as a proximity communication network to form a mesh network.

Description

Automatic fire detection system based on internet of thing}

The present invention relates to a fire detection system, and more particularly, to a system that automatically detects fire more precisely and accurately based on the Internet of Things.

National Fire Safety Standards (NFSC) is a collection of regulations that stipulate standards for firefighting facilities, and according to the fire safety standards of NFSC 203 automated fire detection facilities, a building's automated fire detection facilities must be equipped. According to NFSC 203, a detector is a device that automatically detects the occurrence of a fire and transmits the information to the receiver. Receivers come in a variety of formats, and are receivers that receive signals from a detector or transmitter as a common signal directly or through a repeater and generate an alarm. For example, R-type and GR-type receivers receive unique signals from multiple detectors or P-type transmitters and notify the relevant person of the alarm. In particular, since it is difficult to directly connect the detectors and transmitters installed in a large building to the receiver, the repeater receives the alarm signals from the detectors and transmitters and transmits them to the receiver.

Meanwhile, Korean Patent Registration No. 10-0979173 proposes an optical converter equipped with an optical cable connected in a daisy chain method, an upstream signal path, a downlink signal path, an input/output port, and an R/GR-type receiver for application to large buildings. have. However, the optical communication method has high reliability, but is expensive, requires photoelectric conversion, and requires very precise work such as connecting optical fibers in a complicated process. However, in a conventional communication line other than optical communication, errors such as poor connection, disconnection, and signal distortion often occur in at least one of the uplink or downlink signal paths. In the conventional method, even if the error occurs, it is not possible to accurately specify the point where the error occurs, and thus it is difficult to solve the error. Furthermore, since the conventional method is 1:1 communication in which sensed data is transmitted by wire, if the measured data is lost, there is a concern that fire detection may not operate properly.

The problem to be solved by the present invention is to provide an IoT-based automatic fire detection system that maintains operation even when an error such as poor connection or disconnection occurs, the point where the error occurs is accurately specified, and prevents loss of measured data. I have to.

An IoT-based automatic fire detection system for solving the problem of the present invention includes a detector including a sensor module equipped with a plurality of sensors for fire detection, and a receiver for receiving data detected from the detector. In this case, the detection unit forms a mesh network by linking the plurality of sensor modules to each other as a proximity communication network.

In the system of the present invention, the detector and the receiver include a repeater connected by a communication line for transmitting an electric signal, and the communication line transmits a control signal due to the detection unit to the receiver via the repeater. It is possible to implement an uplink signal path and a downlink signal path for transmitting the control signal caused by the receiver to the detection unit through the repeater.

In a preferred system of the present invention, the sensor module is linked to the proximity communication network, the gateway is linked to the proximity communication network, and the gateway is linked to the control unit via a proximity or remote communication network. The gateway may be linked to one or more of the gateways and the proximity network. The proximity networks may be any one of Bluetooth, Lora, LTE-A, 5G, or Wifi. The repeater may be connected in a daisy chain manner. The repeater may be a two-way converter. IP distribution for wireless communication may be performed in the sensor module.

According to the IoT-based automatic fire detection system of the present invention, by utilizing the Internet of Things, operation continues even when an error such as poor connection or disconnection occurs, an error occurs, and a point is accurately specified, and loss of measured data is detected. prevent.

1 is a block diagram showing a fire detection system according to the present invention.
FIG. 2 is a diagram schematically illustrating a wireless mesh network applied to the detection unit of FIG. 1.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below may be modified in various forms, and the scope of the present invention is not limited to the embodiments described below. Embodiments of the present invention are provided to more completely describe the present invention to those of ordinary skill in the art.

An embodiment of the present invention is a fire detection system that uses the Internet of Things to automatically continue operation even when an error such as poor connection or disconnection occurs, accurately specifies a point where an error occurs, and prevents loss of measured data. Present. To this end, the process of detecting fire using the Internet of Things will be examined in detail, and in particular, a method of blocking an error that occurs in detecting a fire and accurately specifying the point where the error has occurred will be described in detail. In addition, we will look at how to prevent loss of measured data in detail. To this end, an embodiment of the present invention applies a communication method of the Internet of Things and a mesh network.

The Internet of Thing (IoT) is an infrastructure of industries and companies, and it is advancing existing products and services and constantly creating new products and services. The IoT is the core of the 4th industrial revolution and has infinite potential for development by enabling not only the connection between humans and humans, but also the connection between humans and objects, and between objects and objects. Wireless communication, which is one of the core of the IoT, is able to connect and communicate anytime, anywhere beyond the limits of time and space. In the mesh network, the measured data is shared by the network, and the shared data is transmitted in a 1:n method instead of a 1;1 method.

1 is a block diagram showing a fire detection system 100 according to an embodiment of the present invention. However, the drawings are not expressed in a strict sense, and there may be components not shown in the drawings for convenience of description.

Referring to FIG. 1, the fire detection system 100 includes a receiver 10, a communication line 20, a repeater 30, a gateway 40, a detection unit 50, and a control unit 60. The communication line 20 serves to transmit an electric signal. In this case, the control unit 60 is located inside the receiver 10. The detection unit 50 is provided with a device for fire detection and fire prevention, various sensors, and transmitters. The receiver 10 is not necessarily limited to this, but there are five types of P-type, R-type, M-type, GP-type, and GR-type. The R-type and GR-type receivers receive intrinsic signals from a plurality of detectors or P-type transmitters, and notify a related person of an alarm. R-type and GR-type receivers can easily determine the location of the corresponding sensor or transmitter, and each sensor or transmitter is assigned a unique identification code. Here, a description will be made focusing on the R-type and GR-type receivers 10.

The receiver 10 is connected to the control center MC. The receiver 10 includes an interface 11, a display unit 12 and an input/output port 13. The interface 11, the display unit 12, and the input/output port 13 are connected to the control unit 60. The control unit 60 controls operations such as reception and control of control signals, identification of the repeater 30 and detection unit 50 that generated the control signal, and communication with the control center MC. In addition, the control unit 60 checks whether the repeaters 30 connected to the receiver 10 and the line operate normally. Here, the control signal includes a signal transmitted from the receiver 10, data sensed by the detection unit 50, a signal for controlling the operation of various facilities including the repeater 30, and the like. The control signal refers to all signals transmitted from the detection unit 50 to the control center MC through the repeater 30. The interface 11 implements a connection with the control center MC. The display unit 12 includes a display, an LED lamp, a speaker, and the like, and visually or audibly displays an alarm state, an operation state, and the like.

The input/output port 13 receives the control signal generated by the detection unit 50 in the form of an electric signal through the communication line 20 and transmits it to the control unit 60. The input/output port 13 may receive a control signal provided to be transmitted from the control center MC to each detection unit 50 from the control unit 60 and transmit it through the communication line 20. The input/output port 13 may be an RS485/422 input/output port as in the related art. In this case, the input/output port 13 may be configured as, for example, a separate device, a single port converter, and may be mounted to be connected to the RS485/422 input/output port from the outside of the R-type/GR-type receiver 10. In addition, the electric signal may be converted into an RS485/422 signal and transmitted to the R-type/GR-type receiver 10, or the RS485/422 differential signal output from the R-type/GR-type receiver 10 may be transmitted. In some cases, a memory (not shown) may be added to accumulate and store operation information.

The communication line 20 is a medium for transmitting a control signal directed to the receiver 10, and the communication line 20 is a medium for transmitting a control signal output from the receiver 10. Here, the communication line 20 is exemplified as a physically separate cable, but the communication line 20 may be implemented as different signal lines physically located within one communication line. The upstream signal path 21 is a path through which various control signals originating from a sensor or a transmitter of the detection unit 50 are propagated to the receiver 10 through the repeater 30. The downstream signal path 22 is a path for propagating the control signal originating from the receiver 10 through each repeater 30 to the detection unit 50.

The repeaters 30 are electrically connected to each other through a communication line 20 and are electrically connected to the detection unit 50. The repeater 30 outputs the received electric signal. The repeater 30 is electrically connected to the detection unit 50 including various sensors, fire hydrants, sprinklers, firefighting facilities such as halogen fire extinguishers, dampers, fire doors, smoke shutters, smoke-removing facilities such as smoke windows, and other devices such as evacuation guidance lights. It is connected by The detection unit 50 may be grouped into, for example, one business division, one floor, etc. in a building, and may be connected to one repeater 30 by a simple DC signal line or an RS485/422 wire.

The repeater 30 is preferably connected in a daisy chain. When the repeater 30 is connected in a daisy chain method, the control signal transmitted from the subsequent repeater 30 may be selectively or combined with the received control signals to be transmitted to the previous repeater 30. In addition, the repeater 30 transmits the control signal transmitted from the receiver 10 or the control signal transmitted through the previous repeater 30 to the detection unit 50 for which the control signal is targeted, or a subsequent repeater ( 30). A gateway 40 that makes proximity communication with the detector 50 is built into the repeater 30. As for the repeater 30, a known 2-way converter may be adopted, and any method of relaying an electric signal may be applied.

The detection unit 50 includes a device for fire detection and fire prevention, various sensors, a receiver, and a transmitter. The sensor, transmitter, etc. may generate an electrical signal and transmit it to the repeater 30. The sensors or transmitters generate a signal in the form of a differential signal defined in, for example, RS485/422, and the repeater 30 is equipped with an RS485/422 input/output port and can receive a signal through it. In addition, the sensors or transmitters generate a signal in the form of, for example, a single-ended DC signal of DC 24V, and the repeater 30 may be equipped with a DC input/output port to receive a signal.

The control unit 60 controls operations such as reception and control of the control signal by the communication line 20, identification of the repeater 30 and the detection unit 50 that generated the control signal, and communication with the control center (MC). do. The detection unit 50 includes sensors, firefighting equipment, ventilation equipment, and other equipment, and in particular, data sensed by the sensor is wirelessly connected to the gateway 40 and the control unit 60 in the repeater 30. Fire detection by the sensor communicates in a mesh network method. This will be described in detail later in FIG. 2.

FIG. 2 is a diagram schematically illustrating a wireless mesh network applied to the detection unit 50 of FIG. 1. At this time, the fire monitoring system 100 will be referred to FIG. 1.

2, in the system 100 of the present invention, a detection unit 50 including at least one disaster prevention device F and a sensor module S mounted thereon in one repeater 30 is wirelessly configured. Linked. Here, seven disaster prevention devices (F1, …, F7) are exemplified. The number of disaster prevention devices may be appropriately set in consideration of the environment, scale, and the like to which the system of the present invention is applied. Disaster prevention devices (F) include fire hydrants, sprinklers, fire fighting facilities such as halogen fire extinguishers, dampers, fire doors, fire shutters, ventilation facilities such as exhaust windows, and other devices such as evacuation guidance lights. In addition, each of the disaster prevention devices (F) includes a sensor module (S). Here, the seven sensor modules (S1, …, S7) mounted on the seven disaster prevention devices (F1, …, F7) are exemplified. The sensor module S acquires sensor data by detecting, for example, flame detection, smoke amount detection, trigger count, peak point count, displacement, infrared and ultraviolet rays related to the detection time, and image detection.

The sensors of each of the plurality of sensor modules (S) are linked to each other through the proximity communication network (M). The proximity network (M) may be applied in various ways within the scope of the present invention, such as Bluetooth, Lora, LTE-A, 5G, Wifi, and the like. That is, the sensors of each of the plurality of sensor modules S form a mesh network. If each sensor forms a mesh network, sensor data measured by each sensor are shared with each other. In the past, sensor data measured by each sensor was transmitted 1:1 to the control unit through each gateway, but the sensor data measured by the sensors of the present invention is shared through a network, and the shared sensor data is transmitted to the control unit (not shown). ) Is transmitted in a 1:n mesh network method. Here, a 1:7 mesh network method is presented.

Although not shown, the sensor data shared by the proximity communication network (M) in the mesh network method is transmitted to the control unit 60 via the proximity or remote communication network (eg, LTE) through the gateways 40, G1, ..., Gn. . In the gateway 40 (eg, G1), one or more gateways G3 may be linked to the proximity communication network. The control unit 60 controls the disaster prevention device F using the transmitted sensor data. Since the functions and roles of the telecommunication network and the control unit are already well known, detailed descriptions will be omitted herein. At this time, IP distribution and time division for wireless communication follow a known method. In other words, the position of the sensor module S is set in advance.

When the sensor data is transmitted through the mesh network method, all of the sensor data is transmitted to the controller 60 without being lost due to communication failure or the like. As in the past, if individual communication is performed, even if there is a risk of fire in some of the disaster prevention devices (F) or the opening/closing (ON/OFF) is incorrect, it cannot be confirmed if the corresponding disaster prevention device (F) is poorly communicated. However, since the embodiment of the present invention is transmitted in a mesh network method, even if a certain disaster prevention device F is in communication failure, the sensor data of the disaster prevention device F, which is poor in communication, can be checked through another disaster prevention device F in the vicinity. . The safety device of the present invention can check the sensor data of all the disaster prevention devices F in real time, so that necessary measures can be taken in a timely manner. The wireless mesh network can easily check the disaster prevention device (F) in which communication failure has occurred and take necessary measures.

The embodiment of the present invention uses a mesh network method and the Internet of Things, so that the operation continues even if an error such as poor connection or disconnection occurs, an error occurs, and a fire prevents loss of measured data. We present a detection system. To do this, it detects fire using the Internet of Things. In particular, it is possible to block errors that occur in fire detection and accurately specify the point where the error occurs. Specifically, since the IP for wireless communication through the mesh network is set, the location of the sensor S in which the measured data has been lost can be checked.

On the other hand, although the embodiment of the present invention has presented a case in which signal transmission is performed through the repeater 30, the receiver 10 and the detection unit 50 can be implemented by mutual wireless communication without the repeater 30. In this case, the receiver 10 may transmit the control signal to the detection unit 50 through wireless communication. That is, without the repeater 30, the communication line 20 constituting the uplink and downlink signal paths may not be provided. In addition, the gateway 40 may be disposed in a certain area of the detection unit 50.

In the above, the present invention has been described in detail with reference to a preferred embodiment, but the present invention is not limited to the above embodiment, and various modifications are made by those of ordinary skill in the art within the scope of the technical idea of the present invention. It is possible.

100; Fire detection system 10; receiving set
11; Interface 12; Display
13; I/O port
20; Communication line
21, 22; Upward and Downward Signal Paths
30; Repeater
40; Gateway 50; Detection unit
60; Control unit

Claims (9)

A detection unit including a sensor module equipped with a plurality of sensors for detecting fire; And
It includes a receiver for receiving the data detected from the detection unit,
The detection unit Internet-based automatic fire detection system, characterized in that the plurality of sensor modules are linked to each other as a proximity communication network to form a mesh network. The method of claim 1, further comprising a repeater connected between the detection unit and the receiver by a communication line for transmitting an electric signal, and the communication line is an upward direction for transmitting a control signal due to the detection unit to the receiver through the repeater. An IoT-based automatic fire detection system, characterized in that implementing a signal path and a downlink signal path for transmitting a control signal due to the receiver to the detection unit through the repeater. The IoT-based automatic fire detection system according to claim 1, wherein the sensor module is linked to the proximity communication network, the gateway is linked to the proximity communication network, and the gateway is linked to a control unit via a proximity or remote communication network. The IoT-based automatic fire detection system according to claim 3, wherein the gateway is linked to one or more of the gateways and the proximity communication network. The IoT-based automatic fire detection system according to claim 1, wherein the proximity communication networks are any one of Bluetooth, Lora, LTE-A, 5G, or Wifi. The IoT-based automatic fire detection system according to claim 3, wherein the gateway is mounted on the repeater. The IoT-based automatic fire detection system according to claim 1, wherein the repeater is connected in a daisy chain method. The IoT-based automatic fire detection system according to claim 1, wherein the repeater is a 2-way converter. The IoT-based automatic fire detection system according to claim 1, wherein IP distribution for wireless communication is performed in the sensor module.

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