KR101056803B1 - System and method for distinction welding and fire in indoor space - Google Patents

Abstract

PURPOSE: A system for identifying welding and fire in doors is provided to easily identify welding flame and fire flame in industrial sites in which welding is proceed, prevent unnecessary response to wrong fire prediction, and enhance work efficiency. CONSTITUTION: A UV flame sensor(110) senses flame which is generated in fire or welding. A luminance sensor(120) senses illumination change by the flame generated in the fire or the welding. A PIR(Pyroelectric Infrared) sensor for fire detection(130) reacts to only flame which is generated in the fire and detects flame intensity in the fire. A controlling unit(140) analyzes each sensing value, which is received from the UV flame sensor, the luminance sensor, and the PIR sensor for the fire detection and identifies welding situation and fire situation.

Description

System and method for distinction welding and fire in indoor space

The present invention relates to a welding and fire identification system and method in an indoor space, and more particularly to an indoor space that can detect a welding situation and a fire situation by detecting a flame caused by welding or fire that may occur in the indoor space. To a welding and fire identification system and method in the art.

In order to prevent various disasters (ex, fire, explosion, suffocation) in the industrial field, conventionally, various sensors are arranged in the work space to monitor and monitor the disaster. For example, in case of fire, flame or illuminance detection is used, and in case of suffocation, detection of gas and oxygen concentration is used to identify a disaster.

By the way, in the case of an industrial site with welding work, it is difficult to distinguish between sparks due to welding and sparks due to fire, so that a case of incorrectly judging the occurrence of a fire occurs even during welding work. According to this, even when the situation is not a disaster is issued a warning of danger or evacuation, there is a problem that causes the operator to increase the confusion, causing unnecessary evacuation and decrease the work efficiency.

It is an object of the present invention to provide a welding and fire identification system and method in an indoor space, which can detect a welding or fire situation by detecting a spark caused by welding or a fire that may occur in the indoor space.

The present invention, the UV flame sensor for detecting whether the flame generated during the fire or welding, the illumination sensor for detecting the change in the illuminance according to the flame generated during the fire or welding, and responds only to the flame generated during the fire, the fire PIR sensor for detecting the flame intensity according to the control, and each control value received from the UV flame sensor and the illuminance sensor and the fire detection PIR sensor, the control unit for identifying the welding situation and the fire situation It provides a welding and fire identification system in the indoor space comprising.

The welding and fire identification system in the indoor space may further include a single outer case in which the UV flame sensor, the illumination sensor, and the fire detection PIR sensor are detachably installed. A single combined wireless sensor module can be formed.

In addition, the control unit, when the flame is detected by the UV flame sensor, the illuminance value in the illuminance sensor is higher than the normal range, the detection intensity in the fire detection PIR sensor is determined to be the welding situation, When the flame is detected by the UV flame sensor and the detection intensity is outside the normal range in the PIR sensor for fire detection, it may be determined that the fire is in the fire situation.

In addition, the present invention, the step of receiving the flame information from the UV flame sensor for detecting the flame generated during the fire or welding, and the illumination sensing from the illuminance sensor for detecting the change in the illumination according to the flame generated during the fire or welding Receiving a value, receiving a flame intensity sensing value from a fire detection PIR sensor that responds only to a flame generated in a fire, and analyzing the received flame occurrence information, illuminance sensing value, and flame intensity sensing value It provides a method for welding and fire identification in an indoor space, the method comprising identifying a welding situation and a fire situation.

Here, the step of identifying the welding situation and the fire situation, the flame is detected by the UV flame sensor, the illuminance value in the illuminance sensor rises above the normal range, the detection intensity in the fire detection PIR sensor is a normal range In this case, it is determined that the welding situation, when the flame is detected by the UV flame sensor, the detection intensity in the fire detection PIR sensor may be determined to be the fire situation.

According to the welding and fire identification system and method in the indoor space according to the present invention, it is possible to identify the welding situation and the fire situation by detecting the flame caused by welding or fire that can occur in the indoor space. Therefore, in various indoor industrial sites where welding work is carried out, it is easy to identify sparks and sparks in case of welding, thereby preventing unnecessary response due to false fire prediction, preventing confusion of workers and improving work efficiency. There is an advantage to this.

1 is a block diagram of a welding and fire identification system in an indoor space according to an embodiment of the present invention.
2 is a flowchart of a welding and fire identification method in an indoor space using the system of FIG. 1.

1 is a block diagram of a welding and fire identification system in an indoor space according to an embodiment of the present invention.

The indoor space corresponds to various indoor industrial sites where welding work is performed. As an example, the internal operation of the ship for the dock / quayside process of the ship drying process is as follows. The internal work of the ship is mainly performed by welding, cutting, painting (painting), and the spark generated during the welding or cutting is transferred to the flammable material at the bottom and causes a fire. The present invention is intended to detect such a fire early, and also to be able to distinguish between the spark during welding and the flame in the event of fire.

That is, the welding and fire identification system 100 in the indoor space of the present invention facilitates the identification of the spark and the fire when welding on the indoor space, it is possible to prevent unnecessary response due to false fire prediction, Confusion can be avoided beforehand and work efficiency can be improved.

Referring to FIG. 1, the welding and fire identification system 100 in the indoor space includes a UV flame sensor 110, an illuminance sensor 120, a fire detection PIR sensor 130, and a controller 140. .

The UV flame sensor 110 detects whether or not the flame generated during fire or welding. The UV flame sensor 110 detects the flame using UV (ultraviolet), and reacts to both the fire and the flame during welding. Of course, the UV flame sensor 110 also detects the flame generated during the cutting operation.

The illuminance sensor 120 detects a change in illuminance according to a flame generated during fire or welding. The illuminance sensor 120 reacts to both fire and sparks during welding. Of course, the illuminance sensor 120 also reacts to the spark generated during the cutting operation.

In addition, the fire detection PIR sensor 130 reacts only to a flame generated in a fire, and detects a flame intensity according to the fire, and does not respond to a flame resulting from welding or cutting. Here, the fire detection PIR sensor 130 detects the intensity of the flame using PIR (Pyroelectric Infrared).

It is difficult to determine the fire only by the UV flame sensor 110 inside the ship many welding or cutting operations. However, the fire detection PIR sensor 130 reacts to the fire flame but not to the flame generated during welding and cutting operations. Using these differences, it is necessary to identify the flame during welding and cutting and the flame during the fire to detect the fire early.

The control unit 140 analyzes the respective sensing values received from the UV flame sensor 110, the illuminance sensor 120 and the fire detection PIR sensor 130, wired or wireless, to identify a welding situation and a fire situation. do.

Embodiments of welding and fire identification using the control unit 140 are as follows. As an example, the control unit 140 detects the flame from the UV flame sensor 110, the illuminance value rises above the normal range in the illuminance sensor 120, and detects in the fire detection PIR sensor 130 If the strength is in the normal range, it is determined that the welding situation. Of course, in this case, it may correspond to the cutting situation as well as the welding situation. Hereinafter, the case of a cutting operation is abbreviate | omitted and demonstrated.

When the flame is detected by the UV flame sensor 110 and the illuminance value in the illuminance sensor 120 rises above the normal range, both a fire situation and a welding condition are applicable. By the way, since the fire detection PIR sensor 130 represents the normal range, the current situation is identified as a welding situation rather than a fire situation.

As another example, when the flame is detected by the UV flame sensor 110 and the detection intensity of the fire detection PIR sensor 130 is out of the normal range, the control unit 140 determines that the fire situation. This is to identify the case where the detection intensity of the fire detection PIR sensor 130 to the flame in the state exceeding the normal range as a fire situation. In this case, the illuminance value is taken as a case of not using it as an identification criterion in consideration of a situation where a power failure occurs due to a fire.

On the other hand, the system 100 has a single outer case 150 so that each sensor 110, 120, 130 forms a single combined wireless sensor module integrated. In the outer case 150, the UV flame sensor 110, the illuminance sensor 120 and the fire detection PIR sensor 130 are detachably installed. Such a configuration in which the sensors are detachable facilitates the maintenance and management of each sensor (110, 120, 130).

Here, for the operation as the composite wireless sensor module, each sensor 110, 120, 130 may include its own wireless communication function. In addition, the sensors 110, 120, and 130 may be installed in the outer case 150 and connected to a wireless function provided in the outer case 150 to perform wireless communication.

In the case of Figure 1, the control unit 140 is a case where the operation is provided separately to the outside of the outer case 150. In this case, the controller 140 includes a case where the controller 140 is disposed in the vicinity of the outer case 150 or a case where the controller 140 is disposed in an integrated control room at an external remote location.

Of course, the controller 140 is also possible to form itself embedded in the outer case 150. In this case, the control unit 140 wirelessly transmits the information collected from each sensor (110, 120, 130) by wire or wireless and the result of the situation identification to the control server in the external integrated control room to be managed.

The control server receives a result of the situation identification and transmits a warning message to an on-site worker side (eg, a terminal carried by a worker) to enable a quick response according to a detected fire, or in-site equipment. (e.g., on-site situation notification panel) can make warning alarm sound. Such various notification functions are not limited to the above-described examples, and it is obvious that various embodiments may exist.

Hereinafter, the sensing operation test results for each distance of the sensors 110, 120, and 130 will be described. To this end, the test was carried out while moving the composite wireless sensor device from 1 to 10m from the welding or fire point.

Experimental Example  One. UV Test result of flame sensor

Table 1 shows the sensing values for each situation (welding / fire) of the UV flame sensor. The UV flame sensor outputs an ON signal when detecting a flame and an OFF signal when not detected.

1m 2 m 3m 4m 5 m 6m 7m 8m 9m 10 m welding ON ON ON ON ON ON ON ON ON ON fire ON ON ON ON ON ON ON ON ON ON

In the case of the UV flame sensor 110, both the welding situation and the fire situation was observed as the flame is detected for 1 ~ 10m distance. For reference, the UV flame sensor 110 used in the actual observation was a product of Hamamatsu (R2868). Of course, this is for the test, the available UV flame sensor 110 is not necessarily limited thereto.

Experimental Example  2. Test Result of Ambient Light Sensor

Table 2 shows the degree to which the light sensor responds to welding sparks. The illuminance sensor 120 shows a higher sensing value as the distance from the flame is closer.

1m 2 m 3m 4m 5 m 6m 7m 8m 9m 10 m welding 515 350 332 372 363 392 442 457 451 386

Referring to Table 2, in the case of the illumination sensor 120, it can be seen that it is sensitive to the sensing value due to the light generated during welding.

Experimental Example  3. Fire detection PIR Sensor test results

Table 3 shows the sensing values for each situation (welding / fire) of the fire detection PIR sensor. The fire detection PIR sensor 130 outputs a higher sensing value as the distance from the fire flame is closer.

1m 2 m 3m 4m 5 m 6m 7m 8m 9m 10 m welding 322 328 326 326 326 322 325 329 324 327 fire 423 386 369 353 348 344 335 329 324 325

For reference, the fire detection PIR sensor 130 used in the actual observation was Murata IRA-E420QW1 product. The IRA-E420QW1 product is a temperature compensation Pyroelectric Infrared Sensor, which is stable to fire flame detection and robust to external noise. The IRA-E420QW1 derives the sensing value by detecting the wavelength generated in the narrow area of infrared rays 4.3㎛ of the spectrum generated by the fire.

In fact, when the fire detection PIR sensor 130 is placed in a fire or a general indoor space (ex, development room), it showed a sensing value of 320 ~ 330. Of course, this represents the room measurements in the general case where no fire or welding occurred.

In addition, when the fire detection PIR sensor 130 is directly exposed to sunlight in the open air, it exhibited a sensing value of 380-395. In addition, using a lighter, when the fire was just in front of the PIR sensor 130 for the fire detection, a value of 1023, which is the maximum value of the sensing value, was measured.

Based on these points, referring to Table 3, the situation-specific sensing values of the fire detection PIR sensor 130 are not found. It can be seen that.

Here, since the sensing value in the welding situation corresponds to the measurement range on the general indoor space, it is confirmed that the fire detection PIR sensor 130 does not respond to the welding situation at all.

In addition, looking at the fire situation of Table 3, the distance point exceeding the sensing value range (320 ~ 330) in the general indoor space corresponds to the range within 7m. Accordingly, it can be seen that the fire detection PIR sensor 130 can detect a fire situation within a distance of 7 m.

Of course, more precisely, if the 7m distance is a critical distance, the detection error may occur for this 7m distance, for example, when the composite wireless sensor module is about 5m from the fire flame, more stable sensing You can perform the operation.

The fire detection PIR sensor 130 reacts only to the actual fire flame within a distance of 7 m, so that a proper threshold (ex, 345) is set and applied to the site to determine the fire situation. For example, when the sensing value of the UV flame sensor 110 is ON, the illuminance sensing value of the illuminance sensor 120 is higher than usual, and the sensing value of the fire detection PIR sensor 130 is 320 to 330. It is determined that the welding situation. In addition, when the sensing value of the UV flame sensor 110 is ON, and the sensing value of the fire detection PIR sensor 130 is 345 or more, it is determined that the fire situation.

In addition, since the detection angle of the fire detection PIR sensor 130 used in the experiment is 34 degrees, when installing the composite wireless sensor device, it should be installed in consideration of the detection angle (34 degrees) and the sensing distance (within 7m). do. For example, the composite wireless sensor device may be installed in one or a plurality of indoor spaces in consideration of the detection angle and the detection distance of the fire detection PIR sensor 130.

As described above, the IRA-E420QW1 product is used for the test of the fire detection PIR sensor 130, and the fire detection PIR sensor 130 is not necessarily limited thereto. In addition, it is obvious that the sensing angle and sensing distance may be different for each PIR sensor product actually applied.

2 is a flowchart of a welding and fire identification method in an indoor space using the system of FIG. 1. Hereinafter, the welding and fire identification method in the indoor space will be described with reference to FIG. 2.

First, the flame generation information is received from the UV flame sensor 110 for detecting whether the flame occurs during fire or welding (S210). In addition, the illumination sensing value is received from the illumination sensor for detecting a change in the illumination according to the spark generated during fire or welding (S220). In addition, the flame intensity sensing value is received from the fire detection PIR sensor 130 responding only to the flame generated in the fire (S230).

Here, each of the sensors (110, 120, 130) is installed as a single composite wireless sensor module in the indoor space to sense the information in real time. The steps S210 to S230 may be simultaneously or sequentially performed on the composite wireless sensor module. For the real-time detection and situation determination, it is effective to simultaneously proceed.

After the steps S220 to S230, the controller 140 analyzes the received flame generation information, illuminance sensing value, and flame intensity sensing value to identify a welding situation and a fire situation (S240). Since the identification method in step S240 is the same as described above, a detailed description thereof will be omitted.

Although the present invention has been described with reference to the embodiments shown in the drawings, these are merely exemplary and those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

100: welding and fire system in the indoor space
110: UV flame sensor 120: light sensor
130: fire detection PIR sensor 140: control unit
150: outer case

Claims (5)

UV flame sensor for detecting the flame generated during fire or welding;
An illuminance sensor for detecting a change in illuminance according to a flame generated during fire or welding;
Fire detection PIR sensor in response to only the flame generated in the fire, detecting the flame intensity according to the fire; And
And a control unit for analyzing each sensing value received from the UV flame sensor, the illuminance sensor, and the fire detection PIR sensor to identify a welding situation and a fire situation. The method according to claim 1,
The UV flame sensor, the illuminance sensor and the fire detection PIR sensor further includes a single external case detachably installed, so that the welding in the indoor space forming a single composite wireless sensor module incorporating each sensor And fire identification system. The method according to claim 1 or 2,
The control unit,
When the flame is detected by the UV flame sensor, the illuminance value rises above the normal range in the illuminance sensor, and the detection intensity of the fire detection PIR sensor is in the normal range, it is determined that the welding situation is performed.
When the flame is detected by the UV flame sensor, the detection intensity in the fire detection PIR sensor outside the normal range, welding and fire identification system in the indoor space that determines that the fire situation. Receiving flame generation information from the UV flame sensor for detecting whether the flame generated during fire or welding;
Receiving an illuminance sensing value from an illuminance sensor for detecting a change in illuminance according to a spark generated during a fire or welding;
Receiving a flame intensity sensing value from a fire detection PIR sensor that reacts only to a flame generated in a fire; And
And analyzing the received flame occurrence information, illuminance sensing value, and flame intensity sensing value to identify a welding situation and a fire situation. The method according to claim 4,
Identifying the welding situation and the fire situation,
When the flame is detected by the UV flame sensor, the illuminance value rises above the normal range in the illuminance sensor, and the detection intensity of the fire detection PIR sensor is in the normal range, it is determined that the welding situation is performed.
When the flame is detected by the UV flame sensor, the detection intensity in the fire detection PIR sensor is outside the normal range, welding and fire identification method in the indoor space that determines that the fire situation.

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