KR20210009076A - System and device for container security based on multi hop - Google Patents

Abstract

The present invention relates to a multi-hop based container security system and a device thereof capable of reducing power consumption. According to the present invention, the multi-hop based container security system and a device thereof comprises: a central server for controlling a reader and processing information about the container security devices collected through the reader; the reader for collecting the information about the container security devices within a communication range using a first frequency; and the container security devices for widening the communication range in a multi-hop manner to collect the information about the container security devices positioned out of the communication range of the reader using a second frequency with a band different to the first frequency. The container security device sets a communication path by transmitting a collection command to another container security device arranged within its communication range using the second frequency and displays a path mark on the container security device set as the communication path to prevent other container security devices from setting the container security device marked with the path mark as a path.

Description

Container security system and device through frequency domain change {SYSTEM AND DEVICE FOR CONTAINER SECURITY BASED ON MULTI HOP}

The present invention is a multi-hop-based container security system and device capable of quickly and efficiently transmitting and receiving information and conditions of containers stacked by stacking to a reader, protecting a container security device from an external environment and overcoming communication obstacles in the vicinity. It is about.

Registered Patent No. 10-0867718 (registered on November 3, 2008) of the present applicant introduces "a dual frequency band active RFID system having expandability for port logistics".

The dual frequency band active RFID system having expandability for port logistics includes: an RFID reader unit for acquiring information of an object to be checked; A tag unit containing information on the subject to be checked; And a smart tag unit for collecting tag information outside the communication range of the RFID reader using a second frequency of a band different from the first frequency for collecting tag information, wherein the communication range of the RFID reader is set in a multi-hop method. Expand.

However, when the dual frequency band active RFID system having expandability for port logistics is applied to a container yard or container ship in which a plurality of containers are stacked, too many transceivers within the communication range of the RFID reader or smart tag unit ( Tag or a smart tag unit), there is a problem in that communication recognition between the transmitting and receiving devices is duplicated, and power consumption required for link establishment is increased.

In addition, when the containers are stacked in a stacked structure, the smart tag unit and the tag located at the bottom are difficult to recognize, and there is a problem that the antenna or the smart tag unit is damaged due to rain, snow, etc. in a container ship or yard.

Accordingly, an object of the present invention is to collect container information in the group by grouping container security devices (CSD) mounted on the container, even if containers are stacked on a container yard or container ship, and the grouped container security device The container security device, which is the lead in the middle, transmits container information to the reader and the central server, reducing redundant recognition and data consumption between container security devices according to the multi-hop communication method, and reducing power consumption due to communication of the container security device Providing multi-hop based container security systems and devices

to be. In addition, by installing a container security device inside the container, installing an antenna connected to the container security device on the top of the container, and protecting the antenna and antenna wire with waterproof rubber, It is to provide a multi-hop-based container security system and device that can prevent the container security device from being damaged and reduce communication failure.

A container security system according to an embodiment of the present invention includes a central server for controlling a reader and processing information of container security devices collected through the reader; Collecting information of container security devices within the communication range using the first frequency

And a container security device that extends a communication range in a multi-hop manner so that information of container security devices outside the communication range of the reader can be collected using a second frequency of a band different from the reader and the first frequency. , The container security device sets a communication path by transmitting a collection command to another container security device within its communication range using a second frequency, and displays a path mark on the container security device set as the communication path. , It is characterized in that the container security device marked with the path mark blocks other container security devices from setting a path.

The container security device includes a distance measuring unit that measures a distance to a neighboring container security device, a grouping unit that groups neighboring container security devices into groups when the distance between the adjacent container security devices is the same, and grouped container security devices A container security device configured as a lead and a container security device configured as a lead in a different group communicate with each other, including a lead setting unit that sets any one of the container security devices as a lead.

The container security device is characterized in that it comprises a storage unit for storing cargo information, group name and lead presence information and route information of the container.

The container security device is characterized in that it comprises a sensor unit for sensing data such as temperature, humidity, security status.

The distance measuring unit of the container security device is characterized in that it measures a distance using a received electric field strength value of a neighboring container security device.

The grouping unit may group neighboring container security devices if distances between two or more container security devices adjacent to each other are the same through the distance measuring unit.

The lead setting unit is characterized in that the container security device positioned at the top of the container security devices stacked through the grouping unit is set as a lead.

In the multi-hop-based container security device according to an embodiment of the present invention, the main body is disposed on the ceiling inside the container, and the clamp is mounted on the side of the main body, so that the clamp is bolted to the side of the door frame, so that the main body is attached to the side of the door frame. It is butted, and a'┛'-shaped fixture is extended on the side of the main body, so that the fixture protrudes to the outside through the door frame and the door, and a security sensor is mounted under the fixture, so that the security sensor is It is characterized in that the antenna is installed at one end of the vertical portion of the fixing table that detects the opening and protrudes outward.

It is formed in the horizontal portion and the vertical portion of the fixing by a line insertion, an antenna line is inserted along the line insertion path, and the antenna line is connected to the antenna. A waterproof member is installed in the line insertion path into which the antenna line is inserted.

Thereby, the multi-hop-based container security system and device according to the present invention collects container information in the group by grouping container security devices mounted on the container even if containers are stacked in a container yard or container ship, Among the grouped container security devices, the lead container security device transmits container information to the reader and the central server, reducing redundant recognition and data consumption between container security devices according to the multi-hop communication method, and power according to communication of the container security device There is an effect that can reduce consumption.

In addition, the multi-hop-based container security system and device according to the present invention installs a container security device inside the container, installs an antenna connected to the container security device on the top of the container, and protects the antenna and antenna wire with waterproof rubber, It prevents damage to the container security device by external environments such as rain or snow in container ships or yards, and has the effect of reducing communication obstacles.

1 is a block diagram of a multi-hop-based container security system according to an embodiment of the present invention
2 is an exemplary view for explaining a multi-hop-based container security system according to an embodiment of the present invention. FIG. 3 is a configuration diagram of a container security device in a multi-hop-based container security system according to an embodiment of the present invention. Figure 5 is an exemplary diagram for explaining the operation process of the multi-hop-based container security system according to an embodiment of the present invention. Figure 5 is a side cross-sectional view of the multi-hop-based container security device according to an embodiment of the present invention. Partial side sectional view showing a hop-based container security device mounted on the container

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

1 and 2, a multi-hop-based container security system according to an embodiment of the present invention includes a central server 100, a reader 200, and a container security device 300.

The central server 100 controls the reader 200 and processes information on the container security devices 300 collected through the reader 200.

The reader 200 collects information of the container security devices 300 within a communication range using the first frequency.

The container security device 300 uses a second frequency of a band different from the first frequency to multiply the communication range so that information of the container security devices 300 outside the communication range of the reader 200 can be collected. Expands by hop method.

The container security device 300 sets a communication path by transmitting a collection command to another container security device 300 within its communication range using a second frequency, and the container security device set as the communication path ( By displaying a path mark on 300), the container security device 300 marked with the path mark blocks other container security devices 300 from setting a path.

Thereby, when the container security device 300 sets a communication path to expand the communication range to other container security devices 300 [0027] nearby, the path mark is displayed on the container security device 300 in which the path is set. Is displayed, it is possible to prevent other container security devices from setting the path redundantly.

For example, the first container security device 300-1, which has received a collection command from the reader 200, has a communication range to the surrounding second to fourth container security devices 300-2,300-3,300-3,3004. The communication path is set by expanding, and the path mark is displayed on the surrounding first to fourth container security devices 300-2,300-3,300-3,3004.

Thereafter, the fifth container security device 300-5, which has received a collection command from the reader 200, attempts to set a communication path by transmitting a collection command to the second container security device 300-2 located nearby. The second container security device 300-2 is already marked with a path mark, and thus ignores the collection command of the fifth container security device 300-5.

Referring to FIG. 3, the container security device 300 is a distance measuring unit 310 that measures a distance to a neighboring container security device 300, and when the adjacent container security devices 300 have the same distance, Container security devices 300

Includes a grouping unit 320 grouped into a group, a lead setting unit 330 for setting one of the grouped container security devices 300 as a lead, and a container security device set as a lead ( 300) and the container security device 300 set as a lead in a different group communicate with each other. The container security device 300 stores container cargo information, group name, lead presence information, and route information

Includes part 340. The storage unit 340 stores a group name designated as a group through the grouping unit 320, so that the container security device 300 can check the group to which it belongs, and the lead setting unit 330 allows itself to be read. You can determine whether it is.

The container security device 300 includes a sensor unit 350 for sensing data such as temperature, humidity, and security status. A security sensor against intrusion of a container is operated by the sensor unit 350, and a security sensor When intrusion occurs by the container security device 300, the intrusion message is transmitted to the central server 100 through the reader 200, and environmental information of the container, etc.

To transmit.

In an embodiment of the present invention, the first frequency may be 24 GHz and the second frequency may be 433 MHz.

The container security device 300 uses a first frequency, which is a low frequency, so that the container security device 300 facilitates communication with other container security devices 300 between containers stacked in a narrow area. I can.

The container security device 300 is not always connected to the reader 200, and the communication distance with the reader 200 is limited.

In general, the communication distance between the reader 200 and the container security device 300 is about 30m.

Referring to FIG. 4, the reader 200 transmits a collection command only to the container security device 300 set as a read (L) within its communication range using a first frequency, and receives a collection command. The container security device 30 set as (L) transmits an information collection command to the container security device 300 set as a neighboring lead (L) using the second frequency.

Thereafter, when the communication path for the container security device 300 set as the lead (L) is set, the container security device 300a set as the lead (L) is the information of the container security devices 300a to 300d belonging to the same group. To collect. The container security device 300 set as the collected lead (L) sends the information collected in the reverse direction to the direction in which the command was received to the reader 200.

send.

The distance measuring unit 310 of the container security device 300a measures the distance d by using the received electric field strength value of the neighboring container security device 300b.

The distance measuring unit 310 includes a master unit that attempts to connect to a neighboring container security device 300b, and a slave unit waiting for connection of the neighboring container security device 300b, the Links of the container security devices 300a and 300b on both sides are established through the master unit and the slave unit.

Thereafter, when the master unit of the container security device 300a transmits an Inquiry packet to the neighboring container security device 300b, the slave unit of the neighboring container security device 300b is in the search scan mode. The packet is received and a response packet is transmitted to the container security device 300a.

The response packet includes a received signal strength (RSSI) value indicating the received signal strength of the search packet, and the distance measuring unit 310 of the container security device 300a obtains the received electric field strength value. Thus, the distance d between the neighboring container security devices 300a and 300b can be estimated through the obtained received electric field strength value.

The technique of measuring the distance through the received electric field strength value is a known technique described in detail in Korean Patent Registration No. 10-0443953, and a detailed description thereof will be omitted in the present invention. When the distance d between two or more container security devices 300a to 300d adjacent to each other through the distance measurement unit 310 is the same, the neighboring container security devices 300a to 300d Group them.

In general, the container security device 300 is mounted at the same location of the container, and when the containers are stacked, the distance between the container security devices 300a to 300d disposed vertically is the same, so that the grouping unit 320 ) Determines that the containers are stacked if the distance d of the two or more adjacent container security devices 300a to 300d is the same.

The grouping unit 320 determines that the distance d is the same when it is measured that the distance of the security devices 300a to 300d is within a predetermined range around the distance d.

Therefore, when the distance d of the neighboring container security devices 300a to 300d stacked up and down through the distance measuring unit 310 is the same, the grouping unit 320 determines that the containers are stacked up and down. Thus, the four container security devices 300a to 300d including themselves are grouped, and the same group name (A or B) is displayed on the group display unit of the storage unit 340.

The lead setting unit 330 sets the container security device 300 positioned at the top of the container security devices 300 stacked through the grouping unit 320 as a lead L.

The grouping unit 320 through the number of communication links of the container security device 300 in the group (the container security device at the bottom and the top has one set communication link), the container security device in which it is disposed at the bottom or the top It can be determined that it is 300, and the lead setting unit 330 reads the container security device 300 having excellent electric field strength by checking the electric field strength with the reader 200 or the neighboring container security device 300 (L). Set to

In general, since the reader 200 is located at the top of the container yard or container ship, the container security device 300 having a large communication strength (electric field strength) of the reader 200 is located at the top.

Accordingly, when the container security device 300 is installed in each container and stacked at regular intervals in a container yard or a container ship, the container security device 300 is separated from the container security device stacked up and down. By measuring, it is determined that containers are stacked at the same interval, and the container security devices 300 stacked in a row are grouped.

In addition, by setting any one grouped container security device as a lead, the container security device 300 set as the lead (L) collects information of other container security devices 300 included in the group, Container set as the group's lead (L)

By communicating with the inner security device 300 or the reader 200, redundant recognition of data due to the multi-hop method and unnecessary power consumption of the container security device 300 due to communication are prevented.

A multi-hop-based container security device according to an embodiment of the present invention will be described with reference to FIGS. 4 to 7 as follows.

In the container security device, the main body 10 is mounted on the inner ceiling of the container C, and a'┛' shaped fixing rod 30 is extended on the side of the main body 10, so that the fixing rod 30 is a door frame. (F) and the door (D) protruding to the outside through the

A security sensor 40 is mounted on the lower part of 30, so that the security sensor 40 detects the opening of the door D, and at one end of the vertical part 32 of the fixing table 30 protruding to the outside. An antenna 33 is installed.

The main body 10 is mounted inside the container by a magnet (M) or a fixing bracket.

Thereby, the container security device is installed inside the container C, is not affected by the external environment, and the container security device cannot be operated from outside.

In addition, the security sensor 40 mounted on the main body 10 always detects the opening of the door D, so when an intruder attempts to open the door D of the container C without permission, the security sensor 40 ) Detects this and communicates with the container security device.

Alert messages can be sent to the remote and central server.

The clamp 20 may be mounted on the side of the main body 10, so that the distance between the main body 10 and the container can be adjusted by the clamp 20, so that the door frame F of the container C ) Even if the thickness is different, by adjusting the length of the clamp 20, the main body

(10) can be mounted in an appropriate position.

The horizontal portion 31 of the fixing table 300 is supported by the door D.

The fixing table 300 may be a solid member or a flexible rubber material.

A line insertion path (not shown) is formed in the horizontal portion 31 and the vertical portion 32 of the fixing table 30, an antenna line (not shown) is inserted along the line insertion path, and the antenna line is an antenna ( 33).

In addition, a waterproof member 34 is installed in the antenna wire insertion path.

As a result, the antenna wire included in the vertical portion 32 of the fixing table 30 is protected by a waterproof member (rubber, etc.), and the antenna wire is prevented from being damaged by external environmental factors (seawater, rainwater, etc.). Can be prevented.

In addition, the antenna 33 is located at the top of the container, so that the container security device can communicate without communication failure.

The security sensors 40 are installed in a pair to detect the door D that is opened with both doors. The identification number 50 is a protective plate that protects the antenna line and the vertical part 32 of the fixing table 30. In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is limited to the specific embodiments described above.

It is not defined, and various modifications can be implemented by a person of ordinary skill in the technical field of the present invention without departing from the gist of the present invention claimed in the claims, and these modifications are the technical idea of the present invention. It is understood individually from or from a perspective.

100: central server
200: reader
300: container security device
10: main body
20: clamp
30: fixture
40: security sensor

Claims (1)

A central server that controls the reader and processes information on container security devices collected through the reader; a reader that collects information on container security devices within a communication range using a first frequency, and a second band different from the first frequency. 2 Using a frequency, it includes a container security device that extends the communication range in a multi-hop method so that information of container security devices outside the communication range of the reader can be collected, and the container security device uses a second frequency to Set a communication path by transmitting a collection command to another container security device within the communication range of, and display a path mark on the container security device set as the communication path, and secure another container with the container security device marked with the path mark. A multi-hop-based container security system, characterized in that it blocks the device from setting a path.

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