KR100763450B1 - Fire prevention system adopting wireless communication based on ubiquitous - Google Patents

Abstract

A fire prevention system adopting wireless communication based on ubiquitous is provided to detect an arc type signal source by a digital method using a processor having CPU(Central Processing Unit), thereby reducing the malfunction of devices and removing sources of a fire. A fire prevention system adopting wireless communication based on ubiquitous comprises the followings: an input signal unit(110) for receiving signals form a power stage; a filtering unit(120) for filtering the signal inputted through the input signal unit; a first comparing unit(130) for determining whether the filtered signal is arc signal by comparing reference voltage provided from the reference voltage generating unit; an amplifying unit(150) for amplifying the signal; a second comparing unit(160) for comparing the amplified signal with next signal; an arc signal converting unit(170) for converting the arc signal passed through the second comparing unit to a digital signal and the digital arc signal is higher than reference trip level and arc failure signal; and a trip signal generating unit(180) for outputting a trip signal.

Description

Fire prevention system using ubiquitous based wireless communication {FIRE PREVENTION SYSTEM ADOPTING WIRELESS COMMUNICATION BASED ON UBIQUITOUS}

1 is a block diagram illustrating a conventional arc defect detector.

2 is a block diagram illustrating an arc fault detector of the present invention.

3 is a flow chart illustrating a process applied to the arc defect detector of the present invention.

Figure 4 is a flow chart of the operation of the fire protection system applying the arc defect detector of the present invention.

5 is a diagram illustrating a fire prevention system to which the process shown in FIG. 4 is actually applied.

<Description of the symbols for the main parts of the drawings>

10, 100: arc defect detector 11, 110: input signal portion

12, 120: filter unit 13, 130: first comparison unit

14, 140: reference voltage generator 15, 150: amplifier

16, 160: second comparison unit 17: trip level adjustment unit

18: level limiting unit 19, 180: trip signal generating unit

170: arc signal conversion unit

The present invention relates to a fire prevention system, and proposes a reliable arc defect detector, an arc defect detection method, and a fire prevention system.

Every year, the number of fires caused by electricity is increasing all over the world, and the damages to property and lives are rapidly increasing. As the incidence rate of electric fires increases every year, awareness of fire protection is increasing, but there are still insufficient measures to prevent fire. Therefore, finding and preventing the source of a fire before the fire can reduce the damage to a lot of property and life in the fire of an electric fire.

To this end, many countries, including the United States, have legislated to detect and block arcing, which is the cause of electric fires. In the United States, Miniature Circuit Breakers are used in switchboards and Ground Fault Circuit Interrupters (GFCIs) are used in outlets where the user's hands are in direct contact. The ground fault protection circuit breaker (GFCI) is a kind of a ground fault breaker and has a high sensitivity ground fault detection function, and is mandatory to use in places such as a kitchen, a bathroom, a parking lot, or a basement with a lot of moisture or moisture. Despite the installation of circuit breakers and earth leakage breakers, many fires occur worldwide every year. This is because arcing faults to ground occur more frequently than the interphase faults described above.

Since the arc type defect generates a current having a root mean square (RMS) below a thermal threshold that can be detected by the breaker, it is difficult to prevent a fire from occurring through the breaker.

Conventional techniques for blocking the arc-type faults include an Arc Fault Circuit Interrupter (AFCI) or an Arc Fault Detection System (AFDS) that cuts off current when an arc fault occurs.

Hereinafter, with reference to the drawings will be described in more detail with respect to the prior art and the problems with the prior art.

1 is a block diagram illustrating a conventional arc defect detector.

Referring to FIG. 1, the conventional arc defect detector 10 includes an input signal unit 11, a filter unit 12, a first comparator 13, a reference voltage generator 14, an amplifier 15, and a first detector. 2, a comparison unit 16, a trip level adjusting unit 17, a level limiting unit 18, and a trip signal generating unit 19 are included.

The input signal section 11 detects a broadband signal source transmitted through a power line. The signal source is filtered through the noise removing filter circuit of the filter unit 12, and the filtered signal source is connected to the reference voltage provided from the reference voltage generator 14 in the first comparator 13. The comparison is made to determine if it is an arc signal. When the determination result signal source is an arc signal, the signal source is amplified by the amplifier 15 and the next signal and current input to the second comparer 16 through the second comparer 16. The signals are compared. Thereafter, the trip level is adjusted through the trip level adjusting unit 17, and the level limiting unit 18 evaluates whether or not the signal source is an arc fault signal that is likely to cause a fire. The arc defect detector 10 integrates signals transmitted via the level limiter 18 to prevent malfunction of the arc defect detector 10 due to a signal similar to the arc defect signal. When a signal larger than the trip level is detected through the above process, it is determined as an arc fault signal and a trip signal is output from the trip signal generator 19.

The conventional arc defect detector 10 physically blocks the current when the current increases more than a certain level to prevent a fire. The biggest problem in detecting the arc defect is that there is a high possibility of a malfunction that causes the circuit breaker to block the wiring system by judging it as an arc defect signal even when an actual arc defect signal does not occur. This phenomenon occurs because arc current and arc voltage are generally not sinusoidal, and various types of voltage and current waveforms may occur depending on the type of arc. That is, since the arc voltage and the arc current may have characteristics similar to pulses generated in the use of home appliances using electric motors such as household fans, dryers, fluorescent lights, or drills, there is a high possibility of malfunction. In addition, the arc is more difficult to detect because the output voltage when an arc occurs and the pulse voltage generated when the electric device is started are similar.

Conventional arc defect detector 10 has a structure that detects the electrical signal in hardware, and has a structure that cuts mechanically, as well as the detection portion, there is a problem that there is a high possibility of malfunction due to mechanical defects. Therefore, the development of the arc defect detector 10 that meets the electrical fire prevention standards is required.

An object of the present invention devised to solve the above problems is to provide an arc defect detector and a detection method that can reduce the malfunction of the device by detecting the arc signal source in a digital method using a processor with a CPU. .

In addition, it is an object of the present invention, if a problem occurs in the power supply, the arc fault detector transmits the information to the central control room using a wireless communication such as WLAN (Wireless Lan) or ZigBee (ZigBee), the central control room also WLAN Or by transmitting this information to a server using a wireless communication such as Zigbee, which transmits the situation to a nearby fire department or KEPCO, which is networked using wireless or mobile communication, It is to provide a system that can be detected and prevented in advance.

The present invention devised to achieve the above object is an input signal unit for receiving a signal from a power supply terminal; A filter unit for filtering the signal input through the input signal unit; A first comparison unit comparing the filtered signal with a reference voltage provided from a reference voltage generator to determine whether the filtered signal is an arc signal; An amplifier for amplifying the signal when the signal is an arc signal as a result of the determination; A second comparator for comparing the amplified signal with a next signal; Converts the arc signal passed through the second comparator into a digital signal, determines whether the digitally converted arc signal is a signal higher than a reference trip level, and determines whether the digital arc signal is a signal generated from a peripheral device; An arc signal converting unit determining whether or not it is; And a trip signal generator for outputting a trip signal when the arc signal is determined to be an arc defect signal.

Here, the arc defect detector may be manufactured by a processor with a built-in CPU.

In addition, the present invention comprises the steps of receiving a signal from the power supply terminal; Filtering the input signal; Comparing the filtered signal with a reference voltage to determine whether the signal is an arc signal; Amplifying the signal if the signal is an arc signal as a result of the determination; Comparing the amplified signal with a next signal; Converting the arc signal into a digital signal; Determining whether the digitally converted arc signal is a signal equal to or greater than a reference trip level; Determining whether the digital arc signal is a signal from a peripheral device; And outputting a trip signal when the arc signal is determined to be an arc defect signal.

In addition, the present invention includes an arc defect detector for detecting the occurrence of the arc defect signal, the location of the arc defect signal is detected; A central control room connected to a plurality of arc defect detectors to receive and collect an arc defect signal from the arc defect detector; And a server that is notified of the detection of the arc fault signal from the central control room and transmits the same to a nearby related organization.

Here, the arc defect detector may be embedded in the switchboard to accurately detect the position of the power terminal of each room or office where the arc defect occurs.

In addition, a signal transmitted from the arc defect detector to the central control room or a signal transmitted from the central control room to the server may be transmitted using a wireless communication such as WLAN or Zigbee.

In addition, the signal transmitted from the central control room to the server may be transmitted using wireless or mobile communication.

In order to fully understand the present invention, the advantages of the operability of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

2 is a block diagram illustrating an arc defect detector of the present invention.

2, the arc defect detector 100 of the present invention includes an input signal unit 110, a filter unit 120, a first comparator 130, a reference voltage generator 140, and an amplifier 150. The second comparator 160, the arc signal converter 170, and the trip signal generator 180 are included.

The input signal unit 110 detects a broadband signal source transmitted through a power line. The signal source is filtered through the noise removing filter circuit of the filter unit 120, and the filtered signal source is provided from the reference voltage generator 140 through the first comparator 130. The voltage is compared to determine whether it is an arc signal. If the signal source is an arc signal as a result of the determination, the signal source is amplified by the amplifier 150 and the next signal input to the second comparator 160 through the second comparator 160; The current signal is compared. Thereafter, the signal source is converted into a digital signal through the arc signal converter 170, and it is determined whether the trip level of the signal source is a predetermined level or more. In addition, the signal source is distinguished from an arc signal generated by a peripheral device in order to prevent malfunction of the arc defect detector 100. If it is determined as an arc fault signal that may cause a fire through the above process, a trip signal is output from the trip signal generator 180.

The arc fault detector 100 may detect an arc fault signal accurately by applying a simpler processor than a method of mechanically blocking an electrical signal by detecting a conventional electrical signal. In addition, by using a processor with a built-in CPU to solve the problem that may occur when detecting the arc fault signal by a mechanical method, it is possible to increase the accuracy when detecting the arc fault signal.

3 is a flowchart illustrating a process applied to the arc defect detector of the present invention. In more detail, Figure 3 shows a process applied to the arc signal converter of the present invention.

Referring to FIG. 3, when an arc signal source is detected from the input signal unit 110, the signal source includes a filter unit 120, a first comparator 130, an amplifier 150, and a second comparator ( Via the 160 is transmitted to the arc signal conversion unit 170. In order to determine whether the signal source is an arc signal, the arc signal converter 170 determines whether the signal source is greater than a predetermined trip level 1 (S100). If the trip level of the signal source is less than 1, the arc defect detector 100 operates normally (S130). If the trip level is greater than 1, the arc fault detector 100 determines that it is an arc signal and proceeds to the next step. The signal source determined as the arc signal is distinguished from the arc signal generated by the peripheral device to extract only the arc defect signal (S110). To this end, the arc signal converter 170 may store a pattern of the arc signal generated by the peripheral device. As mentioned above, in the case of an electronic product having a motor, an arc signal that causes a malfunction of the arc defect detector 100 is generated. Therefore, the step S110 is essential to distinguish the arc defect signal. If it is determined that the arc signal is a signal generated from the peripheral device through the step S110, the arc defect detector 100 operates normally (S130), and if it is determined that the arc signal is not an arc signal generated by the peripheral device, the trip The trip signal is transmitted to the signal generator 180 (S120). By performing the above process by converting to digital it is possible to implement the accurate arc defect detector 100. In addition, the steps S100 to S130 are not necessarily performed by receiving the output of the second comparator 160, and some of the elements corresponding to the reference numerals 120 to 160 may be omitted. Will be easy to understand.

4 is a flowchart illustrating an operation of a fire protection system to which an arc defect detector of the present invention is applied, and FIG. 5 is a view illustrating a fire protection system to which the process illustrated in FIG. 4 is actually applied.

4 and 5, the arc defect detector 100 of the present invention can be applied to a ubiquitous-based fire prevention system. In more detail, when an arc defect signal is generated, a trip signal is generated through the arc defect detector 100, and the detected arc defect signal is blocked (S200). Since the arc fault detector 100 embedded in each switchboard is connected to the power supply of each room or office, it detects exactly which power source has a problem when a problem occurs in a wire or a power supply or a problem in a home appliance. can do. When the location of the power source having the problem is identified, the matter is transmitted to the central control room using wireless communication such as WLAN or Zigbee (S210). The central control room receiving the arc fault transmits it to the server using wireless communication such as WLAN or Zigbee (S220). The server transmits the situation to a related fire department or a related organization such as KEPCO, which is connected to a network by using wireless or mobile communication (S230). At the fire department or KEPCO that received the above situation, it is possible to prevent a fire caused by electricity by restoring a power stage having an arc fault. That is, the arc defect detector 100 of the present invention may be combined with WLAN or Zigbee communication, wireless or mobile communication to prevent the occurrence of loading.

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

The arc fault detector and method according to the present invention has the advantage that the malfunction of the device can be reduced by detecting the arc signal source in a digital manner using a processor with a CPU.

In addition, the fire protection system according to the present invention, when a problem occurs in the power supply, the arc fault detector transmits the information to the central control room using a wireless communication such as WLAN (Wireless Lan) or ZigBee, The control room also transmits this information to the server using wireless communication such as WLAN or ZigBee, which transmits the situation to a nearby fire department or KEPCO that is networked using wireless or mobile communication to transmit the situation. There is an advantage that can be detected by preventing the source of the in advance.

Claims (9)

An input signal unit receiving a signal from a power supply terminal; A filter unit for filtering the signal input through the input signal unit; A first comparison unit comparing the filtered signal with a reference voltage provided from a reference voltage generator to determine whether the filtered signal is an arc signal; An amplifier for amplifying the signal when the signal is an arc signal as a result of the determination; A second comparator for comparing the amplified signal with a next signal; Converts the arc signal passed through the second comparator into a digital signal, determines whether the digitally converted arc signal is a signal higher than a reference trip level, and determines whether the digital arc signal is a signal generated from a peripheral device; An arc signal converting unit determining whether or not it is; And And a trip signal generator for outputting a trip signal when the arc signal is determined to be an arc fault signal. The method of claim 1, The arc fault detector is an arc fault detector manufactured by a processor with a built-in CPU. In the arc defect detection method, (a) determining whether the digital arc signal is at or above a reference trip level; (b) determining whether the digital arc signal is from a peripheral device; And and (c) generating a trip signal when the digital arc signal is a signal above a reference trip level and the digital arc signal is not a signal generated from the peripheral device. The method of claim 3, wherein Performed before step (a) (d) receiving a signal from a power supply terminal; (e) filtering the input signal; (f) comparing the filtered signal with a reference voltage to determine whether it is an arc signal; (g) amplifying the determination result if the signal is an arc signal; (h) comparing the amplified arc signal with a next signal; And (i) converting the arc signal into a digital signal to generate the digital arc signal. delete An arc defect detector for detecting occurrence of an arc defect signal and for identifying a location of the arc defect signal; A central control room connected to a plurality of arc defect detectors to receive and collect an arc defect signal from the arc defect detector; And A server for receiving notification of the detection of an arc fault signal from the central control room and transmitting the same to a related authority nearby; The arc fault detector is built in the switchboard is a fire protection system that can accurately detect the position of the power terminal of each room or office where the arc fault occurred. An arc defect detector for detecting occurrence of an arc defect signal and for identifying a location of the arc defect signal; A central control room connected to a plurality of arc defect detectors to receive and collect an arc defect signal from the arc defect detector; And A server for receiving notification of the detection of an arc fault signal from the central control room and transmitting the same to a related authority nearby; The signal transmitted from the arc fault detector to the central control room or the signal from the central control room to the server is transmitted using a wireless communication such as WLAN or Zigbee. An arc defect detector for detecting occurrence of an arc defect signal and for identifying a location of the arc defect signal; A central control room connected to a plurality of arc defect detectors to receive and collect an arc defect signal from the arc defect detector; And A server for receiving notification of the detection of an arc fault signal from the central control room and transmitting the same to a related authority nearby; The signal transmitted from the central control room to the server is transmitted using a wireless (Mobile) or mobile (Mobile) communication system. An arc defect detector for detecting occurrence of an arc defect signal and for identifying a location of the arc defect signal; A central control room connected to a plurality of arc defect detectors to receive and collect an arc defect signal from the arc defect detector; And A server for receiving notification of the detection of an arc fault signal from the central control room and transmitting the same to a related authority nearby; The arc fault detector is an arc fault detector according to claim 1.

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