KR20070031040A - Trash Can using Electromagnetic Field to counter terrorism and system sensing explosive - Google Patents

Abstract

The present invention relates to a trash bin for collecting garbage and the like installed in a public place, such as a subway, and more particularly, having a metal sensing means for generating an electromagnetic field by oscillating a predetermined frequency in the input port into which the object is put, The present invention relates to an anti-terrorism bin and an explosive detection system using electromagnetic fields for detecting terrors such as explosives by detecting frequency fluctuations or eddy currents generated according to an object injected into the central control unit.

In order to achieve the above object, the anti-terrorism trash bin using the electromagnetic field according to the present invention is installed in a public place, such as subway in the trash bin for collecting garbage, the trash can is a metal sensing means for detecting the input of the metal body in the inlet It is characterized by being attached.

In addition, the explosive detection system according to the present invention in the explosive detection system for detecting an explosive containing a metal by constituting an electromagnetic field by oscillating a predetermined specific frequency, the explosive detection system is a power supply for supplying AC or DC power, the An oscillation part that receives electric power from the power supply and flows a current of a specific frequency to generate electromagnetic fields around the metal sensing means by electric vibration by high frequency. And a sensing unit for sensing, a wired / wireless transmitter and receiver for transmitting the sensing result of the sensing unit to a repeater or a central control unit, and a control unit for controlling the operation of the component.

Garbage Can, Terrorism, Explosives, Frequency Fluctuation, Eddy Current, Electromagnetic Field

Description

Trash Can using Electromagnetic Field to counter terrorism and system sensing explosive}

1 to 6 is a view showing a terrorism prevention trash box and explosive detection system using an electromagnetic field according to the first embodiment of the present invention,

1 is a view showing the appearance of a trash can;

Figure 2 is a view showing a cross section of the inlet.

3 is a view showing that the main body and the inlet is separated.

4 is a view showing the appearance of a wheel further provided.

5 illustrates components of an explosive detection system.

Figure 6 is a flow chart showing the operation when detecting the abnormal signal of the terrorism prevention system according to the present invention.

7 and 8 are views showing the anti-terrorism trash can using the electromagnetic field according to the second embodiment of the present invention,

7 is a view showing the appearance of a trash can;

8 is a cross-sectional view of the inlet.

<Description of Symbols for Main Parts of Drawings>

100: trash bin 110: body

120: inlet 121: metal detection means

The present invention relates to a trash bin for collecting garbage and the like installed in a public place, such as a subway, and more particularly, having a metal sensing means for generating an electromagnetic field by oscillating a predetermined frequency in the input port into which the object is put, The present invention relates to an anti-terrorism bin and an explosive detection system using electromagnetic fields for detecting terrors such as explosives by detecting frequency fluctuations or eddy currents generated according to an object injected into the central control unit.

Recently, terrorism caused by explosives has been increasing all over the world, and among them, trash cans installed in public places such as subways can be used as a means of terror, and the need for preparation for them is increasing. That is, in general, most of the trash cans installed in a public place have a cube shape, and an opening is formed in the upper part thereof, so there is a risk of hiding explosives there.However, in order to prepare for this, the trash can is checked and monitored. In the end, manpower, cost and time for this are wasted and its efficiency is not high.

Accordingly, as part of the prevention of terrorism, the method of dismantling garbage cans in subway stations is also considered, which may cause inconvenience to passengers and cause discomfort due to unauthorized dumping of garbage, which is not a fundamental solution.

In order to solve this problem, a method of monitoring a trash can is proposed using CCTV installed in a subway platform. Garbage bins installed in public places are generally made of opaque metal material, so it is difficult to check the objects that are put in from the outside, so there is a limit to monitoring.

In addition, the method of simply monitoring the trash can visually has a problem that is difficult to apply to the explosives hidden inside and exploded into other objects.

In addition, trash cans installed in public places need to be moved or dismantled as needed, whereas existing trash cans are heavy and once installed, they are cumbersome to move or remove.

The present invention is to solve the above problems, by configuring a metal sensing means for generating an electromagnetic field by oscillating a predetermined frequency in the inlet of the trash can installed in public places to detect the frequency change or eddy current generated by the object to be injected It aims to prevent terrorism by explosives.

In addition, the present invention by using a transparent or opaque synthetic resin or non-metallic material of the bin can be configured to identify the object put in the case of the transparent bin, to reduce the waste of time and money, and manpower to monitor the bin The purpose.

In addition, the present invention is configured to be detachable from the main body of the inlet of the trash can, it characterized in that the existing trash can can be attached to the inlet provided with a metal sensing means.

In addition, an object of the present invention is to configure a wheel for movement at the lower end of the trash can, the purpose of the movement of the installation site and the removal of the trash can more easily.

In order to achieve the above object, the anti-terrorism trash bin using the electromagnetic field according to the present invention is installed in a public place, such as subway in the trash bin for collecting garbage, the trash can is a metal sensing means for detecting the input of the metal body in the inlet It is characterized by being attached.

In addition, the trash can is made of a transparent or opaque material of synthetic resin or non-metallic material, characterized in that the vertical opening width of 15cm to 25cm.

In addition, the inlet is characterized in that the sliding plate having an inclined surface inclined at a predetermined angle on the inner bottom.

In addition, the inlet is characterized in that it is configured to be detachable from the body of the trash can.

In addition, the four corners of the lower end of the trash can is characterized in that the wheel for movement.

In addition, the metal detecting means is characterized by consisting of a coil or the like to form a closed circuit along the shape of the inlet.

In addition, the metal detecting means is characterized in that a pair of windings made of a coil or the like formed side by side in the transverse direction of the inlet.

In addition, the explosive detection system according to the present invention in the explosive detection system for detecting an explosive containing a metal by constituting an electromagnetic field by oscillating a predetermined specific frequency, the explosive detection system is a power supply for supplying AC or DC power, the An oscillation part that receives electric power from the power supply and flows a current of a specific frequency to generate electromagnetic fields around the metal sensing means by electric vibration by high frequency. And a sensing unit for sensing, a wired / wireless transmitter and receiver for transmitting the sensing result of the sensing unit to a repeater or a central control unit, and a control unit for controlling the operation of the component.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 5 is a view showing the anti-terrorism trash bin and explosive detection system using an electromagnetic field according to the first embodiment of the present invention, Figure 1 is a view showing the appearance of the trash can and Figure 2 is a cross-sectional view of the inlet Drawing.

As shown in Figure 1, the anti-terrorism trash bin 100 according to the first embodiment installed in the subway platform, etc. is composed of a main body 110 made of a hexahedral shape and the upper part of the main body is an object such as garbage Inlet 120 is made. Here, the waste bin 100 is made of a synthetic resin or non-metallic material of a transparent or opaque material such as polyethylene (PE: polyethylene), polypropylene (PP: polypropylene) having a relatively light and high strength, and visually shows the object put in from the outside It is more preferable that the production is made transparent so as to be confirmed. In addition, the main body 110 is preferably formed in a hexahedral shape, but may also be formed in a winch shape or any other shape.

In addition, the inlet 120 is provided with a metal detecting means 121 for detecting in real time whether the object used for terrorism, such as explosives, the metal detecting means 121 is located around the inlet 120 It consists of a winding, a coil, etc. to form the electromagnetic field formed by oscillating a predetermined frequency to detect the input of the metal body, for this purpose, the input hole 120 is a predetermined position so that the metal sensing means 121 is located between the outer peripheral surface and the inner peripheral surface. It is configured to have a thickness. In addition, the metal detecting unit 121 has a rectangular cross section of 1 to 2 m in length and 15 to 25 cm in length in order to smoothly detect a change in frequency according to an object to be put into the trash can 100. More preferably, the vertical width is composed of about 20cm. Limiting the vertical width as described above is to allow the metal detecting means 121 to perform its function smoothly in consideration of the size of the object that is generally put in the trash. In addition, the shape of the inlet 120 is preferably configured to be integrally connected to the main body, the size of the cross-section toward the top may be larger, smaller, or kept constant.

As described above, the metal detecting means 121 positioned inside the inlet 120 is formed to close a winding or coil several times along the shape of the inlet 120 to form a closed circuit, as shown in FIG. When the electromagnetic field due to the high frequency is formed around the means 121, the frequency change or the generation of the eddy current by the object introduced into the main body 110 of the trash can 100 is detected through the inlet 120. This frequency variation and eddy current generation will be described in more detail in the components of the explosive detection system described below.

As shown in Figure 3, the trash can 100 is configured as described above, it is more preferable that the inlet 120 is configured to be detachable from the main body 110. As the inlet 120 of the trash can 100 is configured to be detachable, the inlet 120 having the metal detecting means 121 is attached to the trash can installed in an existing public place to detect the input of the metal object. Applicable as anti-terrorism bins.

In addition, the anti-terrorism trash bin 100 having such a configuration, as shown in Figure 4, further comprises a wheel 130 for movement in the four corners of the lower end, to move the installation place of the trash bin 100 as needed It is convenient to dismantle, remove or replace.

5 is a diagram illustrating the components of the explosive detection system 200.

Explosive detection system 200 for monitoring the frequency change of the electromagnetic field formed around the metal detection means 121 or the generation of eddy current to detect the input of a potentially terrorist object, and sends an alarm signal to a central control unit such as a station room 200 ) Is a power supply unit 201 for supplying power to the system, the oscillation unit 202 for generating an electromagnetic field around the metal sensing unit 121 by generating a predetermined high frequency signal by receiving power from the power supply unit, the frequency change of the formed electromagnetic field Or a sensing unit 203 for detecting eddy current generation in real time, a wired / wireless transmitter and receiver 204 for transmitting the detection result of the sensing unit 203 to the repeater 301 or the central control unit 300, and all the above components. It includes a control unit 205 for controlling the operation of these.

The power supply unit 201 is a device for supplying power to drive the explosive detection system 200 may be made of a separate battery using a commercial AC power or using a DC power, accordingly when using a commercial power There is further provided a rectifier.

In addition, the oscillator 202 includes an oscillation circuit for receiving an electric power from the power supply unit 201 to flow a current of a specific frequency to form an electromagnetic field around the metal sensing unit 121 by electric vibration by a high frequency. The oscillation circuit is generally composed of a circuit resonating to a current of a specific frequency and an amplifier circuit for continuously supplying a resonance current, and is formed by combining an inductance L and a capacitance C of an electric circuit element. Here, the specific frequency is determined by Equation 1 below.

The specific frequency is generally a high frequency of several KHz to several MHz is used, but if the use frequency is too high, the power supplied also has to be increased, thereby causing a complicated circuit, so that the specific frequency is considered in relation to the power supply. It is preferable to be made around 24KHz. This particular frequency is monitored in real time by the sensing unit 203, and the result is transmitted through a wired or wireless transmitter 204 in a wired or wireless manner.

The detector 203 monitors in real time the amount of current or the change in the magnetic field of a specific frequency of the electromagnetic field supplied from the oscillator 202 to generate an alarm signal when a change in frequency or generation of eddy current is detected to generate a wired / wireless transmitter / receiver ( 204). In general, explosive devices such as explosives consist of a ignition device called a switch and a chain device such as a detonator and a bomb, and these components include metal materials. Therefore, when the explosive passes through the inlet 120 of the trash can 100, the sensing unit 203 detects the frequency change or eddy current generation of the electromagnetic field formed around the metal sensing means 121 by the metal material therein. Will be done.

That is, when a metal material passes inside the electromagnetic field is formed, the inductance (L) is changed by the change in electromotive force, and accordingly the specific frequency is changed as shown in Equation 2 below.

Accordingly, when the specific frequency f ₀ constituting the electromagnetic field formed around the metal detection unit 121 changes to f ₁ by the introduction of a metal object, the detection unit 203 detects such a change and transmits an alarm signal.

In addition, when an electromagnetic field is formed around the metal sensing unit 121, the electromagnetic field is induced into a metal object passing through the metal sensing unit 121, and when the metal object is moved, a change occurs in the electromagnetic field. Eddy-current, an induced current, is generated in the metal object. The secondary electromagnetic field is generated around the metal object by the eddy current generated in the metal object by the above process, and the secondary electromagnetic field is induced by the metal sensing means 121 to generate a current difference due to the current variation. 203 senses the change in the electromagnetic field and outputs an alarm signal.

However, the object to be put into the trash can 100 may include a number of beverage cans made of metal that is not related to the explosives, and the detection unit 203 detects the fluctuation of a specific frequency or the generation of eddy current even by these objects. It may be, but this is processed by the operation at the time of detecting the abnormal signal of the explosive detection system 200 using CCTV to be described later.

In addition, even when the metal object is not injected through the inlet 110 of the trash can 100, even when the metal material approaches the outside of the metal sensing unit 121, frequency variation or eddy current generation may be detected. Metal detection by considering that the detection range of the frequency fluctuation is within 20cm when processed by the operation at the time of detecting the abnormal signal of the explosive detection system 200 using CCTV, or when using a specific frequency of 24KHz as in the embodiment of the present invention It is more preferred that the means 121 be installed as close to the inner circumferential surface of the inlet 120 as possible to prevent malfunctions by external access as much as possible.

In addition, the sensing unit 203 is generally configured to detect a change in the magnetic field regardless of size in the case of a metal object introduced by the speed of free fall, but the size of the metal material is very small and relatively large in the input speed In order to prevent the occurrence of the acceleration or the occurrence of the frequency fluctuations or eddy current is not detected, it is more preferable to configure the internal structure of the main body 110 from the inlet 120 of the trash can 100 to slide down the object. Do. That is, by forming a sliding plate (not shown) having an inclined surface inclined at a predetermined angle on the inner lower end of the inlet 120 of the trash can 100, the injected object slides a predetermined distance at a relatively low speed regardless of the input speed Moving inside the body 110, it is also possible to detect the variation of a specific frequency or the generation of eddy current caused by the metal object is injected at a very high speed.

In the embodiment of the present invention configured as described above has been described with respect to the detection unit 203 of the explosive detection system 200 for detecting a change in the electromagnetic field due to the variation of a specific frequency or the generation of eddy current, as well as the frequency variation or eddy current Any means for detecting the metal object used in the metal detector may be applied to the present invention and should be regarded as falling within the scope of the right.

As described above, the signal transmission process in which the detection result is transmitted to the central control unit 300, such as a subway station, may be directly transmitted from the unit explosive detection system 200 to the central control unit 300 by a wired or wireless method. It is also possible to install a plurality of repeaters 310 to receive the detection results of some explosives detection system 200 to be transmitted back from the repeater 310 to the central control unit 300. When transmitting through the plurality of repeaters 310 as described above, the repeater 310 is provided in the subway platform, waiting room, etc. to receive a frequency signal from the plurality of explosives detection system 200, such as a central control unit such as a station office The batch is sent to 300. In addition, the signal transmission process is preferably made to use a wired or wireless method.

The central control unit 300 as shown in the trash box 100, such as wired and wireless transmission and reception unit 301, the subway platform receiving a frequency or current signal of the electromagnetic field from each explosive detection system 200 or repeater 310, The video output unit 302 is displayed in conjunction with the CCTV installed around the display to display the shooting result, if an abnormality is detected in the frequency signal audio alarm unit 303 for transmitting a voice alarm, the garbage bin 100 where the abnormal signal is detected And an alarm display unit 304 including an LED, a lamp, and an LCD, and a central control unit 305 for controlling the operation of the components. That is, a video output unit 302 including a plurality of monitors in which a result of photographing each trash can 100 by CCTV is provided in a station room of a subway serving as a central control unit 300, The alarm display unit 304 is connected to the monitor, it is possible to check the CCTV and trash can detected an abnormal signal. In addition, the audio alarm unit 303 is provided with one or more to help the administrator of the central control unit 300 to cope with the situation when the abnormal signal is detected, it may be issued a warning sound or vibration in some cases. All operations in the above-described normal or abnormal signal detection are controlled according to a program stored in the central controller 305.

6 is a flowchart illustrating an operation when detecting an abnormal signal of the terrorism prevention system according to the present invention.

As illustrated, when an abnormal signal such as a frequency change or eddy current is detected in the sensing unit 203 (S401), an alarm signal is transmitted to the central controller 300 through the repeater 310 (S402). S403) The central control unit 300 receives the alarm signal as described above, and transmits an alarm sound through the audio alarm unit 303 (S404), the video connected to the corresponding CCTV to photograph the trash can 100 detected the frequency change is detected. The output unit 302 is displayed by the operation of the alarm display unit 304 (S405), so that the administrator of the central control unit 300 can confirm.

Here, in order to avoid the trouble of the administrator turning back the recorded edited copy of the relevant CCTV every time an alarm occurs, automatically rewind the recorded tape for a predetermined time and automatically detect the abnormal signal. It is better to replay it to help the administrator confirm. The predetermined time may be set to about 10 seconds to 30 seconds. For example, when a substance such as a beverage can is input into the trash can 100 and sensed as an abnormal frequency signal due to the nature of the sensing unit 203 that detects whether the metallic material is inserted, the manager automatically plays back. Since it is easy to check the surrounding situation through the screen of the video output unit 302, it is possible to avoid the hassle of checking the inside of the trash can 100 every time an alarm. If the object is not visually determined whether there is a possibility of terrorism such as explosives, it is possible to directly check the inside of the trash can 100 and take necessary measures.

7 and 8 are views showing a terrorism prevention trash can using an electromagnetic field according to the second embodiment of the present invention, the trash can 100 of the second embodiment of the metal detection means 121 is provided in the inlet 120 There is a difference in the form from the first embodiment.

As shown in FIG. 7, the anti-terrorism bin 100 according to the second embodiment installed in a subway platform is formed on a main body 110 made of a transparent or opaque synthetic resin material or a non-metallic hexahedron shape and on an upper portion of the main body. It is composed of an inlet 120 is inserted into the object such as garbage. The inlet 120 is provided in the metal detecting means 121 such as a winding, a coil, etc. for detecting in real time whether the object used for terrorism, such as explosives.

As shown in FIG. 7, the metal sensing unit 121 has a pair of windings formed of a straight line or a coil formed side by side along the transverse direction of the cross section of the inlet. When the current flows through the metal detecting means 121, an electromagnetic field is formed from one winding to the other winding direction, and the frequency caused by an object introduced into the main body 110 of the trash bin 100 through the inlet 120. Detect the occurrence of fluctuations or eddy currents. To this end, the pair of windings is preferably arranged in parallel with a distance of about 20cm in consideration of the size of the object to be injected, the size of the input port and the frequency variation detection range.

In addition, the inlet 120 of the anti-terrorism trash bin 100 according to the second embodiment having such a configuration is configured to be detachable from the main body 110, further comprising a wheel for movement in the lower four corners, In accordance with the convenient place to move or remove the trash can 100, the exchange.

The explosive detection system 200 according to the second embodiment monitors an electromagnetic field formed around the metal detecting unit 121 and transmits an alarm signal to a central control unit such as a station room when an input of a terrorist object is detected. Or a power supply unit 201 for supplying DC power, an oscillation unit 202 for forming an electromagnetic field around the metal sensing unit 121 by electric vibration by a high frequency by flowing a current of a specific frequency, and the specific method due to the introduction of a metal object. It includes a detection unit 203 for detecting a change in frequency or generation of eddy current, a wired or wireless transmission and reception unit 204 for transmitting the detection result by wire or wireless, and a control unit 205 for controlling all the above processes, When using an AC power source, a rectifier (not shown) interworking with the power supply unit 201 may be added. In addition, it receives and outputs a repeater 310 for receiving and transmitting the abnormal signal detected as in the first embodiment, a CCTV 320 for photographing and transmitting the surrounding area in which the trash can 100 is installed, a frequency signal and a video, and the like. , When the abnormal signal is transmitted, the central control unit 300 to issue an alarm is further provided.

In addition, the explosive detection system according to the second embodiment performs the operation for preventing terrorism in the same manner as the first embodiment.

The present invention is not limited to the above-described embodiments, and technical ideas that can be modified and converted by those skilled in the art to which the present invention pertains without departing from the gist of the present invention also belong to the following claims. Should be seen.

According to the present invention having the above-described configuration, the present invention constitutes a metal detecting means for generating an electromagnetic field by oscillating a predetermined frequency in the inlet of the trash can installed in a public place, and by explosives or the like due to the frequency change by the injected object It is effective in detecting and preventing terrorism in advance.

In addition, the present invention is configured to use a transparent or opaque synthetic resin material of the trash can to identify the object put into the transparent trash can, the time and cost of monitoring the trash can, and manpower is reduced to increase the efficiency.

In addition, the present invention is configured so that the inlet of the trash can equipped with a metal sensing means and detachable to the main body, can be attached to the upper portion of the trash can installed in the existing public place, it is possible to reduce the cost of replacing the trash can.

In addition, the present invention has the effect of making the wheel for movement at the lower end of the trash can easier movement of the installation site and the removal, replacement of the trash can as needed.

Claims (8)

Garbage bins installed in public places such as subways to collect garbage, The waste bin is a terrorism prevention bin using an electromagnetic field, characterized in that the metal detection means for detecting the input of the metal body in the inlet. The method of claim 1, The waste bin is made of a synthetic resin or non-metallic material of a transparent or opaque material, the anti-terrorism bins using an electromagnetic field, characterized in that the vertical opening width of 15cm to 25cm. The method according to claim 1 or 2, The inlet has a sliding plate having an inclined surface inclined at a predetermined angle in the lower end of the anti-terrorism bins using an electromagnetic field. The method according to claim 1 or 2, The inlet is anti-terrorism trash box using an electromagnetic field, characterized in that configured to be detachable from the body of the trash can. The method according to claim 1 or 2, Four corners of the lower end of the trash can anti-terrorism trash box using an electromagnetic field, characterized in that the wheel is provided for movement. The method of claim 1, The metal detection means is a terrorism anti-trash bin using an electromagnetic field, characterized in that the coil is formed to form a closed circuit along the shape of the inlet. The method of claim 1, The metal detection means is a terrorism anti-trash bin using an electromagnetic field, characterized in that a pair of windings made of a coil or the like formed side by side in the transverse direction of the inlet. In the explosive detection system for detecting an explosive containing a metal by generating an electromagnetic field by oscillating a predetermined specific frequency, The explosive detection system is a power supply for supplying AC or DC power, An oscillation unit receiving electric power from the power supply unit to flow a current of a specific frequency to form an electromagnetic field around the metal sensing means by electric vibration by high frequency; Sensing unit for detecting the variation of a specific frequency or the generation of eddy current caused by the change of electromotive force of the electromagnetic field when the metal object is inserted, Wired and wireless transmission bride to transmit the detection result of the detection unit to a repeater or a central control unit, and And a control unit for controlling the operation of the component.

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