KR20240076086A - System for assuring safety around container trailer in port and Method thereof - Google Patents

Abstract

The present invention can accurately warn the driver of a container trailer in a port and workers around the container trailer of the risk of an accident, prevent the risk of an accident in the surrounding area when moving a container trailer, and ensure the safety of workers within the port. This relates to a safety assurance system and method around a container trailer.
The safety assurance system around a container trailer in a port of the present invention includes a camera installed on a crane to capture images of the container trailer and the work area around it, receiving images captured by the camera, and based on this, accidents occurring around the container trailer. A peripheral safety security device that determines the risk and transmits an alarm signal when there is a risk of an accident, and when the alarm signal is received from the peripheral safety device, it warns the driver of the container trailer and nearby workers of the risk of an accident. It includes an alarm unit that generates an alarm.

Description

System for assuring safety around container trailer in port and Method thereof}

The present invention relates to a system and method for ensuring safety around a container trailer, and more specifically, to a system and method for ensuring safety around a container trailer in a port, which can prevent risks that may occur when moving a container trailer within a port.

A port is a place where large quantities of goods and people are transferred from sea transport to land transport, and is one of the main connection points. Among port services, a container terminal is a service facility where container ships dock and unload and load containers loaded with cargo, and can be said to be a base for logistics flow. At these container terminals, various tasks such as main ship work, dock transfer work, and container yard work are performed.

Generally, loading and unloading of containers is performed by cranes. Container shipping consists of the following processes: In other words, when a container trailer carrying a container enters the operating area of the crane spreader and stops at a certain position, the crane spreader approaches the top of the container trailer. Then, by the operator's hand signal, the crane moves slightly in the direction of the crane's gantry, or the container trailer moves slightly and adjusts its position. When positioning is completed, the spreader slowly lowers, clamps the container, and is hoisted by a hoist. After the spreader is hoisted to a certain position, the trolley moves toward the ship to load the container. The unloading operation of the container is performed in the reverse order of the loading operation described above.

At this time, workers around the container trailer install the container fixing cone on the container when moving the container to a ship, or remove the container fixing cone from the container when moving the container from the container ship to land. I do it.

However, there are cases where the driver of a container trailer moves the container trailer without being aware of the workers working around the container trailer, causing bodily injury to the workers or causing fatal accidents.

Various methods are being attempted to prevent this risk, and among them, an alarm using a simple infrared sensor around the crane simply recognizes the object and unconditionally sounds an alarm when any object or person is detected in the dangerous area. Meanwhile, devices that require the driver to personally check are also being used through the installation of surveillance cameras (CCTV), but since this depends on the driver's capabilities and also relies on the person's field of vision, there is always a possibility of errors or mistakes occurring.

This existing method cannot accurately determine and warn the driver or worker of the container trailer of the risk of an accident, resulting in a negative learning effect that causes the driver of the container trailer to ignore the alarm, and also causes the driver or worker of the container trailer to ignore the alarm. There is a problem in which the risk of accidents exists.

Republic of Korea Patent Publication No. 10-2020-0102811 (2020.08.14)

The purpose of the present invention is to provide a system and method for ensuring safety around container trailers in a port that can accurately warn drivers of container trailers in a port and workers around the container trailers of the risk of accidents in order to solve the above problems.

In addition, the present invention accurately warns the driver of the container trailer in the port and workers around the container trailer of the risk of accidents, thereby preventing the risk of accidents in the surrounding area when moving the container trailer and ensuring the safety of workers within the port. The purpose is to provide a system and method for securing safety around container trailers.

A system for ensuring safety around a container trailer in a port according to an embodiment of the present invention includes a camera installed on a crane to capture images of the container trailer and the work area around it; A perimeter safety assurance device that receives images captured by the camera, determines the risk of an accident around the container trailer based on this, and transmits an alarm signal when there is a risk of an accident; and an alarm unit that generates an alarm to warn the driver of the container trailer and nearby workers of the risk of an accident when the alarm generation signal is received from the peripheral safety securing device.

Here, two or more cameras may be installed on the top of the crane facing the ground, taking into account blind spots caused by containers or container trailers located within the port.

In addition, by installing three or more cameras and having the perimeter safety security device review duplicate images on the images captured by each camera, the accuracy of confirming the location of the object can be further increased.

Meanwhile, the peripheral safety securing device includes an image receiving unit that receives images captured from the camera; An image learning unit that learns an image recognition model for the side diagonal line displayed in the container trailer work area on the lower ground of the crane based on the captured image; and a risk determination unit that analyzes the captured image based on a learned image recognition model to determine the risk of an accident and transmits an alarm signal.

Here, the side diagonal line may be displayed on the ground below the crane to indicate an area where the container trailer must stop for container loading or unloading operations of the crane.

In addition, the side diagonal lines may be displayed on both sides of an area where a container trailer will stop for container loading or unloading by the crane, and the distance between the side diagonal lines may be formed to be spaced a certain distance apart.

Meanwhile, the image learning unit labels the side diagonal line located on the lower ground of the crane, the container trailer, and the worker using the image data received from the camera, and labels data according to the labeling. can be used as learning data to learn an image recognition model, and the length of the side diagonal line can be learned.

Additionally, the image recognition model may be a real-time object detection model.

And the risk determination unit analyzes the captured image based on a learned image recognition model, and when it is determined that the container trailer is moving, it activates a risk zone that is the worker's risk radius, and enters the risk zone. It is possible to check whether an object is detected and, if the object is recognized, determine the risk based on the moving direction of the container trailer and transmit the alarm signal warning that there is a worker exposed to the risk of an accident.

In addition, the risk determination unit primarily checks whether the object is located within the risk area, and when the object is located within the risk area, it determines that there is a risk of an accident if it is located in front of the moving direction of the container trailer. The alarm signal that warns that there is a worker exposed to the risk of an accident is generated and transmitted, and even if the object is located outside the risk area, if the object is located in front of the moving direction of the container trailer, If it is determined that the risk of an accident is imminent, the alarm signal may be generated and transmitted.

At this time, the danger zone may include the driver's blind spot in the front and rear direction of the container trailer, and may have side diagonal lines marked on both sides as a boundary line in the side direction of the container trailer.

In addition, the risk determination unit may be configured to constantly perform object detection on images captured by the camera and determine only whether the object is dangerous according to the moving direction of the container trailer.

In addition, the peripheral safety securing device further includes a storage unit that stores image data received from the camera, and location information of the camera that transmitted the image data to the storage unit and location information of the crane on which the camera is installed. is stored together, and when an alarm warning of the risk of an accident occurs, the location information and video data information of the camera where the alarm occurred can be transmitted to a port management system (control center) that manages the port.

Meanwhile, a method of securing surrounding safety of a container trailer in a port according to an embodiment of the present invention includes an image capturing step of collecting image data taken of the ground by a camera installed on a crane and transmitting it to the image receiving unit of the surrounding safety securing device; An image in which the image learning unit of the perimeter safety security device learns an image recognition model for the side diagonal line displayed in the container trailer work area on the ground below the crane based on the image data received from the image receiver of the perimeter safety device. learning stage; If the risk judgment unit of the perimeter safety device analyzes the image data captured based on the learned image recognition model and determines that the container trailer is moving, it activates the risk zone, which is the worker's risk radius. step; The risk determination unit of the perimeter safety device checks whether an object is detected in the risk area, and if the object is recognized, determines the risk based on the moving direction of the container trailer and warns that there is a worker exposed to the risk of an accident. A risk determination step of transmitting an alarm signal to an alarm unit; And an alarm generation step in which the alarm unit generates an alarm to warn the driver of the container trailer and the workers around him of the risk of an accident according to the alarm generation signal from the risk determination unit of the surrounding safety security device. there is.

At this time, the side diagonal lines may be marked on both sides of the area where the container trailer will stop for container loading or unloading of the crane, and the distance between the side diagonal lines may be formed to be spaced at a certain distance, and the risk area may be includes the driver's blind spot in the front and rear directions of the container trailer, and the side diagonal lines indicated on both sides may be used as boundary lines in the side direction of the container trailer.

The system and method for ensuring safety around a container trailer in a port according to the present invention can accurately warn the driver of a container trailer in a port and workers around the container trailer of the risk of an accident.

In addition, the present invention accurately warns the driver of the container trailer in the port and workers around the container trailer of the risk of accidents, thereby preventing the risk of accidents in the surrounding area when moving the container trailer and ensuring the safety of workers.

Figure 1 is a block diagram showing a safety assurance system around a container trailer in a port according to an embodiment of the present invention.
Figure 2 is a diagram showing an example of installing the camera of Figure 1 on a crane.
Figure 3 is a diagram for explaining a state in which a container trailer is stopped in a work area below a crane for loading or unloading containers.
Figure 4 is a block diagram showing the perimeter safety securing device of Figure 1 in more detail.
FIG. 5 is a diagram illustrating a state in which the container trailer of FIG. 3 is moving after completing loading or unloading of containers.
Figure 6 is a flowchart showing a method of ensuring safety around a container trailer in a port according to an embodiment of the present invention.

Hereinafter, specific embodiments for carrying out the present invention will be described with reference to the attached drawings.

In describing the present invention, terms such as first and second may be used to describe various components, but the components may not be limited by the terms. Terms are intended only to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, the second component may be referred to as a first component without departing from the scope of the present invention.

When a component is mentioned as being connected or connected to another component, it can be understood that it may be directly connected to or connected to the other component, but other components may exist in between. .

The terms used in this specification are merely used to describe specific embodiments and are not intended to limit the invention. Singular expressions may include plural expressions, unless the context clearly indicates otherwise.

In this specification, terms such as include or have are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, including one or more other features or numbers, It can be understood that the existence or addition possibility of steps, operations, components, parts, or combinations thereof is not excluded in advance.

Additionally, the shapes and sizes of elements in the drawings may be exaggerated for clearer explanation.

Hereinafter, with reference to the attached drawings, the system and method for ensuring safety around a container trailer in a port according to the present invention will be described in detail.

Figure 1 is a block diagram showing a safety assurance system around a container trailer in a port according to an embodiment of the present invention, and Figures 2 and 3 are detailed drawings to explain Figure 1 in more detail.

First, as shown in FIG. 1, the present invention includes a camera 100 installed on a crane to capture images of a container trailer and its surrounding work area, receive images captured by the camera, and based on this, detect the risk of accidents around the container trailer. When an alarm signal is received from the peripheral safety assurance device 200, which transmits an alarm signal when there is a risk of an accident, and when an alarm signal is received from the peripheral safety device 200, there is a risk of accident to the driver of the container trailer and workers around it. It consists of an alarm unit 300 that generates an alarm warning.

In the present invention, the camera 100 is installed at the top of a crane toward the ground, as shown in FIG. 2, captures images, and transmits the captured images to the surrounding safety assurance device 200.

Many cranes used for shipping and discharging containers at the port may be installed in the port, but only one crane is shown in FIG. 2 as an example.

At this time, the camera 110 may be an infrared camera that photographs objects in the infrared region, and two or more cameras may be installed on the top of the crane facing the ground, taking into account blind spots due to containers or container trailers located within the port. there is.

The above descriptions of the camera installation location, installation quantity, and camera type are illustrative, and the present invention is not limited thereto.

Depending on the implementation example, the confirmation accuracy of the object location can be further increased by installing three or more cameras 100 and performing a duplicate image review on the images captured by each camera in a subsequent step.

Meanwhile, in the present invention, a side diagonal line is marked on the ground below the crane to indicate an area where the container trailer must stop for the crane's container loading or unloading work.

Figure 3 is a diagram showing a side diagonal line marked on the lower ground of the crane to indicate an area where the container trailer must stop for the crane's container loading or unloading operation in the present invention.

As can be seen in FIG. 3, in the present invention, side diagonal lines are displayed on both sides of the area where the container trailer will stop for container loading or unloading by the crane, while the distance between the side diagonal lines is set to a certain distance (L). form Drivers and workers of container trailers can accurately align the stopping position of the container trailer using these side diagonal lines spaced at a certain distance.

Meanwhile, Figure 3 shows the danger zone for workers among the surrounding areas of the container trailer. The danger zone includes the driver's blind spot in the front and rear directions of the container trailer, and has side diagonal lines marked on both sides as the boundary line in the side direction of the container trailer.

This danger zone is an area where a risk of accident may occur to workers when moving the container trailer. In the present invention, when movement of the container trailer is detected, the danger zone is activated to determine the movement direction (forward or backward) of the container trailer and the position of the worker. Determine whether it is dangerous or not.

Next, the surrounding safety assurance device 200 receives the image captured by the camera 100, determines the risk of an accident around the container trailer, and sends an alarm signal to the alarm unit 300 if there is a risk of an accident. It is transmitted, and a detailed explanation of this will be provided below.

Finally, when an alarm signal is received from the peripheral safety assurance device 200, the alarm unit 300 generates an alarm to warn the driver of the container trailer and workers around him of the risk of an accident.

At this time, in addition to being provided audibly using a speaker, the alarm can be provided visually using warning lights installed around the crane, or both can be provided in parallel. Additionally, it can be provided audio-visually or hapticly using a worker device that the worker can wear with work clothes.

Hereinafter, the perimeter safety securing device 200 and its operating method of the present invention will be described in detail with reference to FIGS. 4 and 5.

FIG. 4 is a block diagram showing the perimeter safety securing device 200 of FIG. 1 in more detail. And FIG. 5 is a diagram for explaining how the peripheral safety securing device 200 of FIG. 1 operates, and shows the state in which the container trailer of FIG. 3 moves after completing loading or unloading of containers.

As can be seen in FIG. 4, the perimeter safety securing device 200 of the present invention includes an image receiver 210 that receives images captured from the camera 100, and a container trailer work area on the ground below the crane based on the captured images. An image learning unit 220 that learns an image recognition model for the side diagonal line shown in , and analyzes the captured image based on the learned image recognition model to determine the risk of an accident and generate an alarm signal. It consists of a risk judgment unit 230 that transmits.

Here, the image learning unit 206 of the present invention labels the side diagonal line, container trailer, and worker located on the lower ground of the crane using the image data received from the camera 100, and labels the labeling data according to the labeling ( Labeling data is used as learning data to learn an image recognition model.

In particular, when the image learning unit 220 learns an image recognition model based on the image captured by the camera 100, it learns about the side diagonal line displayed in the container trailer work area, and in particular learns about the length of the side diagonal line. I order it.

The image recognition model used in the present invention can be trained using one of the real-time object detection models, and the image learning unit 220 trains the image recognition model based on the training data. Since the method has already been disclosed in the relevant field, detailed description thereof will be omitted.

Meanwhile, the risk determination unit 230 of the present invention analyzes the captured image based on a learned image recognition model and, when it is determined that the container trailer is moving, activates the worker's risk radius, that is, the risk area. .

At this time, as described above, the danger zone includes the driver's blind spot in the front and rear direction of the container trailer, and the boundary line is the side diagonal line marked on both sides in the side direction of the container trailer.

Afterwards, the risk determination unit 230 checks whether an object, that is, a worker, is detected in the risk area, and if an object is recognized, determines the risk based on the moving direction of the container trailer and warns that there is a worker exposed to the risk of an accident. An alarm generation signal is transmitted to the alarm unit 300.

Figure 5 is a diagram for explaining how the risk determination unit 230 of the present invention determines risk based on the moving direction of the container trailer.

In Figure 5, there are a total of 5 workers (Nos. 1 to 5) working around the container trailer, and among them, 2 workers (Nos. 3 and 4) are located in the risk area. Additionally, worker number 5 is not located within the danger zone, but represents a situation in which he is located in the direction of movement of the container trailer.

When the risk determination unit 230 of the present invention determines that the container trailer is moving, it activates the risk zone and performs object recognition on the captured image. As a result of object recognition, if an object, that is, a worker, is recognized, whether it is dangerous is judged based on its location and the direction of movement of the container trailer.

That is, the risk determination unit 230 primarily checks whether the object is located within the risk area, and when the object is located within the risk area, it determines that there is a risk of an accident if it is located in front of the moving direction of the container trailer, thereby determining the risk of an accident. Generates and transmits an alarm signal to warn that there is an exposed worker.

In addition, even if the object is located outside the danger zone, if the object is located in front of the moving direction of the container trailer, it is determined that the risk of an accident is imminent, and an alarm signal is generated and transmitted.

Therefore, in the case of Figure 5, the present invention determines that objects 4 and 5 (workers) are at risk of accident, and accordingly generates an alarm signal to warn that there is a worker exposed to the risk of accident, and generates an alarm unit ( 300).

Depending on the implementation, the risk determination unit 230 may constantly perform object detection on images captured by the camera 100, and in this case, only determines whether the object is dangerous according to the moving direction of the container trailer. This allows quick judgment and alarm generation.

Through the above method, the present invention can accurately warn the driver of the container trailer in the port and workers around the container trailer of the risk of accidents, prevent the risk of accidents in the surrounding area when moving the container trailer, and ensure the safety of workers. can be secured.

Meanwhile, depending on the implementation, the perimeter safety securing device 200 of the present invention may be additionally provided with a storage unit (not shown) for storing image data received from the camera 100, where the image data is transmitted. The location information of the camera 100 and the location information of the crane on which the camera is installed can be stored together. In addition, when an alarm warning of the risk of an accident occurs, location information and video data information of the camera where the alarm occurred can be transmitted to the port management system that manages the port.

Figure 6 is a flowchart showing a method of ensuring safety around a container trailer in a port according to an embodiment of the present invention.

The method of securing the surrounding safety of a container trailer in a port of the present invention first collects image data captured on the ground by at least two cameras 100 installed on a crane and transmits it to the image receiving unit 210 of the surrounding safety securing device 200. Transmitting video recording step (S100);

Based on the image data received by the image receiver 210 of the perimeter safety device 200, the image learning unit 220 of the perimeter safety device 200 generates an image for the side diagonal line indicated in the container trailer work area on the ground below the crane. An image learning step (S200) of learning an image recognition model;

When the risk determination unit 230 of the peripheral safety assurance device 200 analyzes the image data captured based on the learned image recognition model and determines that the container trailer is moving, the worker's risk radius, that is, the risk. Danger zone activation step (S300) to activate the zone;

The risk determination unit 230 of the peripheral safety assurance device 200 checks whether an object, that is, a worker, is detected in the risk area, and if an object is recognized, it judges the risk based on the moving direction of the container trailer and exposes it to the risk of an accident. A risk determination step (S400) of transmitting an alarm signal to the alarm unit 300 to warn that there is an operator present; and

An alarm generation step ( S400).

Here, the image learning unit 206 uses the image data received from the camera 100 to label the side diagonal line, container trailer, and worker located on the lower ground of the crane, and labeling data according to the labeling. is used as learning data to learn an image recognition model.

In particular, when the image learning unit 220 learns an image recognition model based on the image captured by the camera 100, it learns about the side diagonal line displayed in the container trailer work area, and in particular learns about the length of the side diagonal line. I order it.

The image recognition model used in the present invention can be trained using one of the real-time object detection models, and the image learning unit 220 trains the image recognition model based on the training data. Since the method has already been disclosed in the relevant field, detailed description thereof will be omitted.

In addition, as described above, the danger zone includes the driver's blind spot in the front and rear direction of the container trailer, and has side diagonal lines marked on both sides as the boundary line in the side direction of the container trailer.

Through the above method, the present invention can accurately warn the driver of the container trailer in the port and workers around the container trailer of the risk of accidents, prevent the risk of accidents in the surrounding area when moving the container trailer, and ensure the safety of workers. can be secured.

In Figure 6, steps S100 to S300 are described as being sequentially executed, but this is merely an illustrative explanation of the technical idea of the present invention using an embodiment. In other words, a person skilled in the art to which the present invention pertains may change the sequence shown in FIG. 6 or perform one or more of steps S100 to S300 without departing from the essential characteristics of an embodiment of the present invention. Since various modifications and variations can be applied by executing in parallel, FIG. 6 is not limited to a time series order.

What has been described above includes examples of one or more embodiments. Of course, for purposes of describing the above-described embodiments, it is not possible to describe every possible combination of components or methods, and those skilled in the art will recognize that many additional combinations and permutations of the various embodiments are possible. Accordingly, the described embodiments are intended to include all alternatives, modifications and alterations that fall within the spirit and scope of the appended claims.

10: Crane
20: Container trailer
100: Camera
200: Peripheral safety assurance device
210: Video receiver
220: Video Learning Department
230: Risk judgment department
300: Alarm unit

Claims (15)

As a safety assurance system around a container trailer,
A camera installed on a crane to capture video of the container trailer and its surrounding work area;
A perimeter safety assurance device that receives images captured by the camera, determines the risk of an accident around the container trailer based on this, and transmits an alarm signal when there is a risk of an accident; and
An alarm unit that generates an alarm to warn the driver of the container trailer and workers around it of the risk of an accident when the alarm signal is received from the perimeter safety device. According to claim 1,
The camera is,
A safety security system around container trailers in a port, characterized in that two or more cranes are installed on top of the crane in a direction toward the ground, taking into account blind spots caused by containers or container trailers located in the port. According to claim 2,
A container trailer perimeter safety assurance system in a port, characterized in that three or more cameras are installed, and the perimeter safety assurance device performs a duplicate image review on the images captured by each camera, thereby further increasing the accuracy of confirming the object location. According to claim 1,
The surrounding safety security device is,
an image receiving unit that receives images captured from the camera;
An image learning unit that learns an image recognition model for the side diagonal line displayed in the container trailer work area on the lower ground of the crane based on the captured image; and
A risk determination unit that analyzes the captured images based on a learned image recognition model to determine the risk of an accident and transmits an alarm signal. According to claim 4,
The side diagonal line is,
A safety assurance system around a container trailer in a port, characterized in that it is displayed on the lower ground of the crane to indicate an area where the container trailer must stop for container loading or unloading of the crane. According to claim 5,
The side diagonal lines are,
A safety security system around a container trailer in a port, characterized in that the area where the container trailer will stop for container loading or unloading of the crane is marked on both sides, and the distance between the diagonal lines on the sides is spaced apart at a certain distance. According to claim 4,
The video learning department,
The image data received from the camera is used to label the side diagonal line located on the lower ground of the crane, the container trailer, and the worker, and the labeling data according to the labeling is used as learning data to create an image. Train an image recognition model,
A safety assurance system around a container trailer in a port, characterized in that the length of the side diagonal line is learned for the side diagonal line. According to claim 7,
The image recognition model is,
A safety assurance system around container trailers in a port, characterized by a real-time object detection model. According to claim 4,
The risk judgment department,
If it is determined that the container trailer is moving by analyzing the captured video based on the learned image recognition model, the danger zone, which is the danger radius of the worker, is activated,
It checks whether an object is detected in the risk area, and when the object is recognized, it determines the risk based on the moving direction of the container trailer and transmits the alarm signal to warn that there is a worker exposed to the risk of an accident. Safety assurance system around container trailers in ports. According to clause 9,
The risk judgment department,
First, check whether the object is located within the danger zone, and when the object is located within the danger zone, determine that there is a risk of an accident if it is located in front of the moving direction of the container trailer, and the worker is exposed to the risk of an accident. Generating and transmitting the alarm signal to warn that there is a
Even if the object is located outside the danger zone, if the location of the object is located in front of the moving direction of the container trailer, it is determined that the risk of an accident is imminent, and the alarm signal is generated and transmitted. Safety assurance system around my container trailer. According to claim 10,
The danger zone is,
A safety security system around a container trailer in a port, characterized in that the driver's blind spot is included in the forward and backward directions of the container trailer, and the side diagonal lines indicated on both sides are used as boundary lines in the lateral direction of the container trailer. According to clause 9,
The risk judgment department,
A system for ensuring safety around a container trailer in a port, characterized in that it is configured to continuously perform object detection on images captured by the camera to determine whether the object is dangerous according to the moving direction of the container trailer. According to claim 4,
The surrounding safety security device is,
It is further provided with a storage unit for storing image data received from the camera, and stores location information of the camera that transmitted the image data and location information of the crane on which the camera is installed in the storage unit,
Securing safety around container trailers in the port, characterized in that when an alarm warning of the risk of an accident occurs, location information and video data information of the camera that generated the alarm are transmitted to a port management system (control center) that manages the port. system. As a method of securing the surrounding safety of a container trailer,
A video recording step in which a camera installed on a crane collects video data captured on the ground and transmits it to the video receiver of the surrounding safety device;
An image in which the image learning unit of the perimeter safety security device learns an image recognition model for the side diagonal line displayed in the container trailer work area on the ground below the crane based on the image data received from the image receiver of the perimeter safety device. learning stage;
If the risk judgment unit of the perimeter safety device analyzes the image data captured based on the learned image recognition model and determines that the container trailer is moving, it activates the risk zone, which is the worker's risk radius. step;
The risk determination unit of the peripheral safety assurance device checks whether an object is detected in the risk area, and if the object is recognized, determines the risk based on the moving direction of the container trailer and warns that there is a worker exposed to the risk of an accident. A risk determination step of transmitting an alarm signal to an alarm unit; and
An alarm generating step in which the alarm unit generates an alarm to warn the driver of the container trailer and the workers around it of the risk of an accident according to the alarm generation signal from the risk determination unit of the surrounding safety security device; within the port comprising; How to ensure safety around container trailers. According to claim 14,
The side diagonal lines are marked on both sides of the area where the container trailer will stop for container loading or unloading by the crane, and the distance between the side diagonal lines is formed to be spaced at a certain distance,
The risk area includes the driver's blind spot in the front and rear direction of the container trailer, and has the side diagonal lines marked on both sides in the side direction of the container trailer as a boundary line. Safety around the container trailer in the port. How to secure it.