KR101272405B1 - System and device for container security based on multi hop - Google Patents

Abstract

PURPOSE: A multi hop-based container security system and a device thereof are provided to reduce data consumption and overlapping recognition by transmitting the container information to a reader and a central sever. CONSTITUTION: A central server(100) controls a reader(200) and processes the information of the container security devices(300) collected through the reader. The reader collects the information of the container security devices in a communication range using a first frequency. The container security devices expand the communication range with a multi hop method using a second frequency. The container security devices deliver a collection command to other container security devices in the communication range based on the second frequency to set a communication path and display a path mark on the container security devices.

Description

Multi-hop based container security system and device {SYSTEM AND DEVICE FOR CONTAINER SECURITY BASED ON MULTI HOP}

The present invention relates to a multi-hop based container security system and apparatus that can quickly and efficiently send and receive information and situations of stacked containers in a reader, protect the container security device from the external environment, and overcome communication obstacles in the surroundings. .

Patent No. 10-0867718 (registered on November 03, 2008) of the present applicant introduces a "double frequency band active RFID system having expandability for port logistics."

The dual frequency band active RFID system having extensibility for the port logistics includes: an RFID reader unit for acquiring information of a confirmation target; A tag unit containing information on the confirmation target; 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. Expand to

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

In addition, when the container is stacked in a stacked structure, it is difficult to recognize the smart tag portion and the tag located below, there is a problem that the antenna or smart tag portion is damaged by rain, snow, etc. in the container ship or yard.

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

In addition, by installing a container security device inside the container, by installing an antenna connected to the container security device on the upper part of the container, and protecting the antenna and the antenna wire with waterproof rubber, by the external environment such as rainwater, snow, etc. in a container ship or yard It is to provide a multi-hop-based container security system and apparatus that prevents the container security device from being broken and reduces communication failures.

Container security system according to an embodiment of the present invention comprises a central server for processing the control of the reader and the information of the container security devices collected through the reader; The reader collects information of the container security devices within the communication range using the first frequency and the second frequency of a band different from the first frequency, and collects the information of the container security devices outside the communication range of the reader. And a container security device that extends the communication range in a multi-hop manner, wherein the container security device establishes a communication path by transmitting a collection command to another container security device within its communication range using a second frequency. And, by displaying a path mark on the container security device set as the communication path, it is characterized in that the container security device displayed the path mark is blocked by another container security device to set the path.

The container security device includes a distance measuring unit for measuring a distance from a neighboring container security device, and a grouping unit for grouping neighboring container security devices into groups when the distance between neighboring container security devices is the same. Including a lead setting unit for setting any one of the container security device as a lead, characterized in that the container security device set as a lead and the container security device set as a lead in another group communicate with each other.

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

The distance measuring unit of the container security device is characterized by measuring the distance using the received electric field strength value of the neighboring container security device.

The grouping unit may group neighboring container security devices when the distances of two or more neighboring container security devices are the same through the distance measuring unit.

The lead setting unit may set a container security device located at the top of the container security devices stacked through the grouping unit 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 inner ceiling of the container, and a clamp is mounted at the side of the main body, and the clamp is bolted to the side of the door frame so that the main body is at the side of the door frame. Abutment is formed in the side of the main body extending '┛' shape, the fixture protrudes through the door frame and the door to the outside, the security sensor is mounted on the lower part of the holder, the security sensor of the door Detects the opening, characterized in that the antenna is installed on one end of the vertical portion of the fixing protruding to the outside.

It is formed by the line insertion portion in the horizontal portion and the vertical portion of the stator, characterized in that the antenna line is inserted along the line insertion path, the antenna line is connected to the antenna.

It is characterized in that the waterproof member is installed in the line insertion path in which the antenna wire is inserted.

Accordingly, the multi-hop based container security system and apparatus according to the present invention collects container information in a 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 container security device, which is the lead, transmits the container information to the reader and the central server, reducing the redundant recognition and data consumption between the container security devices according to the multi-hop communication method, and the power according to the communication of the container security devices. It is effective to reduce consumption.

In addition, the multi-hop-based container security system and apparatus according to the present invention by mounting the container security device inside the container, by installing an antenna connected to the container security device on the container top, and protecting the antenna and antenna wire with waterproof rubber, It prevents the container security device from being damaged by external environment such as rainwater or snow in a container ship or a yard, and has an effect of reducing communication failure.

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.
3 is a block diagram of a container security device in a multi-hop based container security system according to an embodiment of the present invention.
4 is an exemplary diagram for explaining an operation process of a multi-hop based container security system according to an embodiment of the present invention.
Figure 5 is a side cross-sectional view of a multi-hop based container security device according to an embodiment of the present invention
6 is a partial side cross-sectional view showing a state in which the multi-hop-based container security device of FIG. 4 is mounted on a container;
7 is an exemplary view for explaining a state in which the multi-hop-based container security device is mounted on the door side of the container according to an embodiment of the present invention;

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 processes the information of the container security device 300 collected through the control of the reader 200 and the reader 200.

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

The container security device 300 multiplies the communication range to collect information of the container security devices 300 outside the communication range of the reader 200 by using a second frequency of a band different from the first frequency. Expand in a hop manner.

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

As a result, when the container security device 300 establishes a communication path in order to extend the communication range to other container security devices 300 in the vicinity, a path mark is displayed on the container security device 300 in which the path is set. Another container security device 300 may be prevented from setting the path in duplicate.

For example, the first container security device 300-1 receiving the collection command from the reader 200 communicates with the surrounding second to fourth container security devices 300-2, 300-3, 300-3, 3004. Set the communication path by extending the, and the first to fourth container security devices (300-2,300-3,300-3,3004) around the path mark is displayed.

Thereafter, the fifth container security device 300-5 receiving the collection command from the reader 200 attempts to establish a communication path by transmitting the collection command to the second container security device 300-2 located in the vicinity. Since the path mark is already displayed on the second container security device 300-2, the second container security device 300-2 ignores the collection command of the fifth container security device 300-5.

Referring to FIG. 3, the container security device 300 includes a distance measuring unit 310 for measuring a distance from a neighboring container security device 300 and a neighboring container security device 300 when the distance between the neighboring container security devices 300 is the same. The grouping unit 320 for grouping the container security device 300 to the group, and the lead setting unit 330 for setting any one of the container security device of the grouped container security device (Lead) The container security device 300 set as a lead and the container security device 300 set as a lead in another group communicate with each other.

The container security device 300 includes a storage unit 340 for storing the cargo information, group name and lead presence information and route information of the container.

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 identify the group to which it belongs, and the lead setting unit 330 You can determine whether it is a lead.

The container security device 300 includes a sensor unit 350 for sensing data such as temperature, humidity, security status.

The security sensor for the intrusion of the container is operated by the sensor unit 350, when the intrusion occurs by the security sensor, the container security device 300 is intrusion message to the central server 100 through the reader 200. It transmits the environment information of the container.

In an embodiment of the present invention, the first frequency may be 2.4 GHz, and the second frequency may be 433 MHz.

The container security device 300 may use a low frequency first frequency to facilitate communication with other container security devices 300 between containers stacked in a narrow area. Can be.

The container security device 300 is not always connected to the reader 200, and the communication distance to 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 a container security device 300 set to a lead L within its communication range by using a first frequency, and receives a collection command. The container security device 30 set to L transmits an information collection command to the container security device 300 set to the neighboring lead L using the second frequency.

Subsequently, when a communication path for the container security device 300 set to the lead L is set, the container security device 300a set to the lead L is information of the container security devices 300a to 300d belonging to the same group. Collect it. The container security device 300 set as the collected lead L transmits the collected information to the reader 200 in the reverse direction in which the command is received.

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

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

Subsequently, 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 the 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 field strength value. The distance d from the neighboring container security devices 300a and 300b may be estimated based on the received field strength values.

The technique of measuring the distance through the received electric field strength value is a known technique described in detail in Korean Patent No. 10-0443953 and the like, and the detailed description thereof will be omitted.

The grouping unit 320 is the same distance between the distance (d) of the two or more container security devices (300a ~ 300d) neighboring through the distance measuring unit 310, neighboring container security devices (300a ~ 300d) Group them together.

In general, the container security device 300 is mounted at the same position of the container, and when the containers are stacked, the distance between the container security devices (300a ~ 300d) arranged up and down is the same, the grouping unit 320 ) Determines that containers are stacked in a stack if two or more adjacent container security devices 300a to 300d have the same distance d.

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

Therefore, when the distances d of neighboring container security devices 300a to 300d stacked up and down through the distance measuring unit 310 are the same, the grouping unit 320 determines that the containers are stacked up and down. Thus, four container security devices 300a to 300d including themselves are grouped together, 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 device 300 stacked through the grouping unit 320 as a lead L.

The grouping unit 320 is a container security device 300 that is arranged at the bottom or top of the container through the number of communication links of the container security device 300 in the group (the lowest top container security device is one set communication link) The lead setting unit 330 may check the electric field strength with the reader 200 or the neighboring container security device 300 to set the container security device 300 having excellent electric field strength as the lead L. do.

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

As a result, when the container security device 300 is installed in each container, and stacked in a container yard or container ship at a predetermined interval, the distance between the container security device 300 is stacked up and down the container security device 300 In the case of equal intervals, it is determined that the containers are stacked, and the container security devices 300 stacked in a row are grouped.

In addition, by setting any one of the grouped container security devices to the lead (Lead), the container security device 300 set to the lead (L) collects the information of the other container security devices 300 included in the group, By communicating with the container security device 300 set as the lead (L) of the group, or by communicating with the reader 200, redundant recognition of data due to the multi-hop method and unnecessary power consumption of the container security device 300 according to the communication To prevent.

4 to 7, a multi-hop based container security apparatus according to an embodiment of the present invention will be described.

In the container security device, the main body 10 is mounted on the ceiling of the inside of the container C, and the '30' shaped stand 30 is extended to the side of the main body 10 so that the stand 30 is a door frame. Protrudes outwards between the (F) and the door (D), the security sensor 40 is mounted on the lower portion of the holder 30, the security sensor 40 detects the opening of the door (D), An antenna 33 is installed at one end of the vertical portion 32 of the holder 30 protruding to the outside.

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

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

In addition, the security sensor 40 mounted on the main body 10 is always detecting the opening of the door (D), when the intruder attempts to open the door (D) of the container (C) without permission, the security sensor (40) ) Detects this and can send an alarm message to the reader and central server connected to the container security device.

The clamp 20 may be mounted on the side of the main body 10, and the gap between the main body 10 and the container may be adjusted by the clamp 20, so that the door frame F of the container C may be adjusted. ), The body portion 10 can be mounted at an appropriate position by adjusting the length of the clamp 20.

The horizontal portion 31 of the fixing stand 300 is supported by the door (D).

The fixing unit 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 stand 30, an antenna line (not shown) is inserted along the line insertion path, and the antenna line is an antenna ( 33).

In addition, the antenna member is provided with a waterproof member 34 in the insertion line insertion path.

As a result, the antenna wire included in the vertical portion 32 of the holder 30 is protected by a waterproof member (rubber, etc.), and the antenna wire is damaged by external environmental factors (sea water, rain water, etc.). It can prevent.

In addition, the antenna 33 is located at the upper end of the container, the container security device can communicate without communication failure.

The security sensor 40 is installed as a pair, it can detect the door (D) that opens to both doors.

The identification number 50 is a protective plate for protecting the vertical portion 32 of the antenna line and the fixing table (30).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention.

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

Claims (10)

A central server for controlling the reader and processing information of container security devices collected through the reader;
A reader for collecting information of container security devices within a communication range using a first frequency;
And a container security device that extends the communication range in a multi-hop manner to collect information of container security devices outside the communication range of the reader by using a second frequency of a band different from 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. Multi-hop based container security system, characterized in that to block the other container security device to set the path to the container security device displayed the path mark.
The method of claim 1,
The container security device includes a distance measuring unit for measuring a distance from a neighboring container security device, and a grouping unit for grouping neighboring container security devices into groups when the distance between neighboring container security devices is the same. A multi-hop based container security system, characterized in that the container security device set to the lead and the container security device set to the lead in communication with each other, including a lead setting unit for setting any one of the container security device as a lead.
3. The method of claim 2,
The container security device is a multi-hop container security system, characterized in that it comprises a storage unit for storing the cargo information, group name and lead presence information and route information of the container.
3. The method of claim 2,
The container security device is a multi-hop based container security system, characterized in that it comprises a sensor for sensing data such as temperature, humidity, security status.
3. The method of claim 2,
The distance measuring unit of the container security device multi-hop based container security system, characterized in that for measuring the distance using the received field strength value of the neighboring container security device.
3. The method of claim 2,
The grouping unit multi-hop-based container security system, characterized in that for grouping the adjacent container security devices, if the distance between the two or more neighboring container security devices through the distance measuring unit equal.
3. The method of claim 2,
The lead setting unit is a multi-hop based container security system, characterized in that for setting the container security device located at the top of the stacked container security device through the grouping unit.
The main body is disposed on the ceiling inside the container, and the clamp is mounted on the side of the main body, the clamp is bolted to the side of the door frame so that the main body abuts on the side of the door frame, and a '┛' shaped stand extends on the side of the main body. Is formed, the holder is projected to the outside through the door frame and the door, the security sensor is mounted on the lower portion of the holder, the security sensor detects the opening of the door, one end of the vertical portion of the fixture protruding to the outside Multi-hop-based container security device, characterized in that the antenna is installed.
The method of claim 8,
The pre-insertion of the horizontal portion and the vertical portion of the stator, the antenna line is inserted along the line insertion path, the multi-hop-based container security device, characterized in that the antenna line is connected to the antenna.
The method of claim 9,
Multi-hop-based container security device, characterized in that the waterproof member is installed in the line insertion path is inserted into the antenna line.

Images