KR101293840B1 - The ship safety navigation system by real-time sharing of wave information - Google Patents

Abstract

The present invention relates to a method of safe ship operation through the sharing of blue information, the purpose of which is to accurately measure the blue information through the radar, and display the information through a plurality of display screens installed in the vessel to share the information, blue information It is to provide a safe ship navigation method by sharing the wave information that can promptly respond to the ship route in the optimal direction.

The present invention measures the blue information around the vessel in operation from the clutter signal received through the receiver of the ship radar, and displays the measured blue information in real time on the display screen of the cabin or cabin through the communication network in the vessel At the same time, alarm alarms are taken in consideration of the ship's route, and the optimum direction of the ship considering the danger situation in case of collision is displayed on the display screen of each cabin and cabin.

Monitoring, wire, cabin, digging, ship, radar

Description

The ship safety navigation system by real-time sharing of wave information}

1 is a block diagram showing an overall flow according to the present invention

Figure 2 is an exemplary view showing the overall flow according to the present invention

3 is an exemplary view showing an overall configuration according to the present invention

DESCRIPTION OF THE REFERENCE NUMERALS

(10) Blue measuring means

(20): display screen

30: Radar

40: ship server

(50): Ship operation related system

The present invention relates to a method of safe ship operation by sharing blue information, and to measure the blue information using a radar installed on the vessel, and display it in real time through a plurality of display screens installed in the vessel to display the blue information everywhere in the vessel The present invention relates to a method of safe ship operation through sharing of blue information which can be easily identified from and simultaneously corrected a ship's route in a stable direction by using displayed information.

In general, blue refers to winds caused by wind blowing on sea level or surface, and winds caused by wind fall from one sea area to other seas where wind is not attenuated. Although relatively short, the shoulders have rounded floors and long spacing. In addition, in the open sea, the two show a complex sea level pattern, and the elements that represent the blue character are digging (the height from the trough of the wave to the floor), and the cycle (from one point to the next). Time), external wavelength, wave pressure, wave velocity, and wave direction.

Such waves, in particular wave digging, have a very significant impact on the stability of ships operating in the ocean. That is, when a high crest is hit against a dangerous direction such as a right angle direction with respect to a ship in operation, the ship may be damaged.

However, conventionally, only the measurement of the blue information as described above is performed by manual operation by visual observation through a telescope, and no specific and systematic measurement is performed.

In addition, when measuring the wave information by the primitive method according to the manual work, it is difficult to measure the accurate information, and considering the characteristics of the sea that changes frequently, it is never efficient, and only the worker knows the wave information. In addition, there are various problems, such as not being able to share information in the cabin or the cabin of the ship, and thus cannot prepare a quick response and a response according to the situation.

The present invention is to solve the above problems, the purpose is to accurately measure the blue information through the radar, and to display the information through a plurality of display screens installed in the vessel to share the information, quickly to the blue information In response, it is to provide a safe ship navigation method by sharing the wave information that can pursue the ship route in the optimal direction.

1 is an exemplary block diagram showing the overall flow according to the present invention, Figure 2 is an exemplary view showing the overall flow according to the present invention, Figure 3 is an exemplary view showing an overall configuration according to the present invention, The present invention measures the blue information around the vessel in operation from the clutter signal received through the receiver of the radar for ships, and displays the measured blue information on the display screen of the cabin or cabin through the communication network in the vessel, taking into account the ship route In addition, alarm alarms are carried out, and the optimum direction of the ship is displayed in consideration of the dangerous situation in case of hull collision.

The ship radar detects any target at sea, i.e., a weak reception signal reflected from a land feature or another ship, searches for the target, and detects the distance to the target and the other party.

In addition to the signal reflected from the target, the received signal of the radar includes noise signals reflected from the sea surface or rain, so that the reception gain is reduced in the near distance and the mathematical gain is increased in the opposite direction, thereby increasing the noise gain. To suppress this, a STC (Sensitivity Control) circuit is installed on the radar.

However, the clutter interferes with the functioning of the radar such as target detection, but in the case of sea clutter due to surface reflection, the clutter contains information on the state of the sea surface. Can be used.

As described above, the present invention enables the monitoring of the wave information by radar measurement in the cabin or the cabin of the ship, and extracts the clutter due to the surface reflection from some sections of the radar image and uses it for wave observation and analysis. This information is displayed along with the vessel operation information through the vessel communication network and the display screen to share information related to the vessel operation and promote safe vessel operation.

That is, the present invention comprises the steps of operating the blue measuring means (S100), measuring and storing the radar signal output from the radar to the server, and converting it to a two-dimensional video signal (S200), and the video signal Interpreting the blue information from the vessel and displaying it on the display screen of each cabin or cabin using the ship communication network (S300), and determining whether a dangerous crest is generated in comparison with the analyzed blue information and the alarm set value (S400). And, when the dangerous crest occurs, calculating the crest hull collision value and correcting the ship's route when the hull collision value exceeds the hull collision limit value compared with a preset hull collision threshold value (S500). ), And displaying the modified route through the display screen of each cabin or cabin using the vessel communication network (S600), and re-ship the hull collision value in the modified route And re-paralling it with the hull collision limit value until the ship hull collision value is less than the hull collision limit value and repeating the ship's course correction and the digging hull collision value (S700) The step of displaying through the display screen of each cabin or cabin using the ship communication network (S800), and the step of releasing the alarm alarm when the risk of digging the danger alarm (S900).

The blue measuring means 10 is configured to selectively perform on / off, it is possible to display or remove the blue information around the vessel on the display screen (20). In addition, the wave measuring means is installed as one module of the ECSI rather than a separate device.

The measured radar signal is transmitted to the server 40 of the ship and stored, and the stored signal is converted into a two-dimensional image signal is displayed through a plurality of display screens 20 installed in each cabin or cabin through the ship communication network .

The radar signal is composed of a reception signal (Video), a heading signal, a synchronization signal (Synchro), etc. reflected back from the land terrain or other ships around the radar, and these signals can be converted into a two-dimensional video signal. have. In addition, the reflection signal of the radar is mixed with a reflection signal from a target such as land terrain or other vessels, and a clutter signal due to sea surface reflection. In the present invention, the target signal is reflected from the reflection reception signal in order to interpret information about blue waves. Either remove the reflected signal from the target, or use the radar's reflected received signal from the sea without the reflected signal from the target.

Measuring and storing the radar signal output from the radar to the server, and converting it to a two-dimensional image signal (S200) is to display the radar image signal on the display screen of each cabin or room, the center point of the screen Plane Position Indicator (PPI) method that displays the received signal in a radiographic manner at the position of the radar scanner in synchronization with the azimuth signal of the antenna, and displays the distance from the radar to the target and the intensity of the reflected signal on the horizontal and vertical axes, respectively. Express in A-Scope format.

The PPI method is easy to grasp the surrounding situation as the target information is displayed in all directions based on the radar position, and the A-Scope method is difficult to grasp the surrounding situation such as the target information because the screen continuously changes. However, it is easy to measure or discriminate the strength of the reflected received signal.

The present invention simultaneously uses two-dimensional image data of the PPI method and data obtained by modifying the two-dimensional method of the A-Scope method in order to easily measure the intensity of the reflected reception signal for each orientation.

Analyzing the blue information from the video signal and displaying it on the display screen of each cabin or cabin using the ship communication network (S300), the blue information is interpreted by the blue measuring means and transmitted to the server for storage, and this is the ship communication network. Data pre-processing step (S310) for pre-processing the video signal extracted from the radar receiving unit by displaying on the display screen installed in each cabin and the room through the data, the data in the form of a two-dimensional A-Scope method and PPI method A data conversion step of converting the data (S320), an analysis target area is set using the converted data, and an analysis step (S330) of analyzing blue information using the PPI method data of the set area; Display step (S340) for transmitting the information to the server to display through the display screen of each cabin and room.

That is, after preprocessing the image signal extracted from the radar receiver, the data is converted into the two-dimensional A-Scope method and the PPI method, and the analysis target area is determined using the two-dimensional A-Scope method data. Automatically set, analyze the blue information using the PPI method data of the set area, and the analyzed blue information is transmitted to the display screen of each cabin and cabin through the server and communication network of the vessel and displayed.

The data preprocessing step (S310) is to filter the trend component of the clutter received signal by the surface reflection, the clutter received signal by the surface reflection is unnecessary components due to the distance to the antenna and various other external factors Because it is included, it needs to be removed beforehand. However, it is difficult to accurately separate the signals of these unnecessary components from the surface reflection clutter signal. Furthermore, since the clutter signal varies depending on the type and age of the radar used, the entire unnecessary signal is treated as one trend component. Filtered.

In other words, the present invention uses an inverse-checked IIR filter that can realize rapid blocking characteristics and stable amplitude characteristics at low regions among digital filtering techniques as a technique of removing trend components. 1].

[Equation 1]

The data conversion step (S320) is to convert the pre-processed data into two-dimensional PPI method and A-scope method, in order to obtain the data of the PPI method and the two-dimensional A-Scope method, the antenna of the radar and The azimuth signal, the synchronization signal, and the reflection reception signal are respectively extracted from the receiver and converted into digital data through a digital signal processing board, thereby obtaining data of a PPI method and a two-dimensional A-scope method. Since the conversion to the 2D video signal is a well known technique, a detailed description thereof will be omitted.

The analyzing step (S330) is to set the analysis target area for measuring the blue information on the radar image data of the PPI method, and to obtain information about the blue by analyzing the data in the set area, the image signal of the analysis region is a trend component In this removed two-dimensional A-scope data, the total amount of energy of the reflected signal for each scan line is compared with each other, and the direction with the most energy is regarded as the direction of the rough wind wave, and the candidate region closest to this direction is determined. Perform a specific wave analysis on the subject.

In more detail,

에 대한 3차원 퓨리에 변환을 수행하여 레이더 이미지 스펙트럼

를 구한다. Image collected n times of the video signal image signal extracted from the radar receiver

Radar image spectrum by performing a three-dimensional Fourier transform on

.

[Formula 2]

를 surface current로 볼 수 있다. 식3으로부터 구한 이미지 스펙트럼을 이용하여 surface current

를 구할 수 있다.Assuming that the measured wave is linear and therefore satisfies the linear dispersion relation, it can be expressed as

Can be seen as surface current. Surface current using the image spectrum obtained from Equation 3

Can be obtained.

[Formula 3]

를 나타내고, ｇ는 중력가속도 그리고 ｄ는 water depth를 나타낸다.Where

Where g is gravity acceleration and d is water depth.

Assuming that the measured signal follows the linear dispersion relation of the waves, the back ground noise can be applied with a band pass filter as shown in Eq.

[Formula 4]

Here, the subscript ｆ means filtered signal. By integrating the three-dimensional image spectrum obtained from Equation 4 with the frequency components, the two-dimensional radar image spectrum can be obtained.

[Formula 5]

는,The measured radar image signal takes the form that the closer the radar is, the greater the intensity of the signal reflected from the object and the exponentially decreases. Therefore, a modulation transfer function (MTF) is introduced to convert the intensity of the measured signal to the wave height to derive the wave spectrum. When applied to this two-dimensional wave number spectrum

Quot;

[Formula 6]

Where β is the empirical coefficient, which is influenced by the imaging mechanism for the sea state.

Alpers and Hasselmann (1982) estimated H _S from radar image information using synthetic aperture imagery. An analysis method based on the assumption that the signal to noise ratio (SNR) for the measured signal is significant and linearly related to H _S is used.

[Equation 7]

Where A and V are calibration constants and SNR is as shown in Equation 8.

(Eq. 8)

The display step (S340) is transmitted to the ship server 40 from the blue measurement means 10, the input of the analyzed blue information is displayed on the ship server display screen (20).

The display step (S340) displays the analyzed blue information through the display screen of each cabin or room, to provide a variety of information in real time to the user, and to share it. That is, the blue information interpreted as described above is transmitted to the server 40 from the blue measuring means 10 and stored therein, and is displayed on the display screen 20 of each cabin or room. In this case, the information displayed through the display screen may be modified and displayed so that only the necessary information may be monitored to fit the characteristics of each cabin or room. Since the screen configuration of such a display screen is a well-known technical means, a detailed description thereof will be omitted.

Determining whether the dangerous alarm crest occurs (S400) receives the analyzed blue information and contrasts it with the preset alarm set value, and if the analyzed blue information is larger than the alarm set value according to the contrast, the ship's Digging alarm alarm is carried out through the display screen installed in cabin and cabin.

In other words, if a wave information value (alarm set value) that is a hazard to a ship is set in advance and inputted, and this is compared with the wave information measured and acquired by a radar, when the wave information value is larger than the alarm set value, It may be a risk factor, and it is displayed through the display screen installed in the cabin and cabin of the ship and warns the passengers of the ship through an alarm.

At this time, a sound such as a buzzer sound or a warning broadcast generated due to the crest alarm alarm may be released by the user's selection.

In step S500 of correcting the ship's route, when the analyzed wave information is larger than the alarm set value according to the contrast, the wave height is calculated using the wave height of the analyzed wave information, and the calculated wave height hull collision value is calculated. If the calculated wave height hull collision value is larger than the input hull collision limit value, the ship route is corrected. At this time, the route correction of the vessel is corrected to the optimal vessel route according to the calculated crest hull collision value and the set input hull collision limit value.

At this time, the hull collision value means that the impact value of the wave is applied to the hull using the wave direction, direction, period of the ship's traveling direction, speed.

The displaying of the modified route (S600) may be performed through a ship communication network so that a user of each cabin or cabin can easily identify a modified vessel route according to the calculated crest hull collision value and a set input hull collision limit value. Transfer to the display screen for display.

Repeating the ship's route correction and the digging hull collision value until the digging hull collision value is less than the hull collision limit value (S700) recalculates the digging hull collision value on the basis of the modified ship route, Recontrast the crest hull collision value and the hull collision limit value, and if the calculated crest hull collision value is larger than the set input hull collision limit value, the ship route is corrected again. As described above, the reconstruction of the ship's crest value based on the ship's route and the correction of the ship's route according to the contrast between this value and the hull's collision limit value are smaller than the calculated hull collision value. And repeated several times until the risk is eliminated.

Displaying the re-modified route (S800) is a ship communication network so that the user of each cabin or cabin can easily grasp the re-corrected vessel route according to the reconstructed wave height hull collision value and the set input hull collision limit value Transfer it to the display screen for display.

In the alarm alarm releasing step (S900), when the calculated crest hull collision value becomes smaller than a set input hull collision limit value, since the risk of hull is released due to the generated crest, the alarm alarm is released.

The present invention configured as described above obtains the blue information around the vessel in operation by using the radar installed in the vessel, and through the display screen of each cabin or cabin by using the server and communication network of the acquired blue information By indicating the danger of the collision of the hull of the digging, it is possible to quickly determine the situation of the ship in operation and the quick response according to the emergency.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

As described above, the present invention measures the blue information around the ship by radar during the operation of the ship, and informs the cabin or cabin through the ship server and communication network the dangers that may occur during the collision of the ship and the ship safety. Operation can be planned.

In addition, the present invention can measure the blue information using a radar pre-installed on the vessel, it is easily applicable without changing the design of the vessel itself, thereby reducing the cost of equipment.

In addition, since the blue information is displayed on the display screen installed in each cabin and cabin, the present invention can easily identify and share all the information necessary for the safe navigation of the vessel in each cabin and cabin, and according to the situation is accurate and There are many effects such as being able to cope quickly.

Claims (8)

Operating the wave measuring means (S100); Measuring and transmitting the radar signal output from the radar to the server, and converting it into a two-dimensional image signal (200); Interpreting the blue information from the video signal and displaying it on the display screen of each cabin or cabin using the ship communication network (S300); Determining whether a dangerous wave is generated in comparison with the analyzed blue information and the alarm set value, and if the analyzed blue information is larger than the alarm set value, performing a digging alarm alarm through the display screen installed in the cabin and the cabin of the ship (S400). ); Calculating a digging hull collision value when a dangerous dug occurs, and correcting the route of the ship when the hull collision value exceeds the hull collision limit value compared with a preset hull collision limit value (S500); Displaying the modified route through a display screen of each cabin or cabin using a ship communication network (S600); Reconstruct the value of the digging hull collision in the revised route, and reconstitute it with the hull collision limit value and repeat the ship's route correction and recalculation of the digging hull collision value until the digging hull collision value is below the hull collision limit value. Performing to (S700); Displaying a repeatedly rerouted route through a display screen of each cabin or cabin using a ship communication network (S800); If the calculated crest hull collision value becomes smaller than the set input hull collision limit value, the step of the alarm alarm is released (S900); The step (S300), A data preprocessing step of preprocessing the image signal extracted from the radar receiver (S310); A data conversion step (S320) of converting the pre-processed video signal into a two-dimensional A-Scope method and a PPI method; An analysis step (S330) of analyzing the blue information using the PPI method data of the set region after setting an analysis target region using the converted data; And a display step (S340) of transmitting the analyzed information to a server to display in real time through the display screens of the cabins and the cabins. delete The method of claim 1; The data preprocessing step (S310) is a ship safety navigation method by real-time sharing of blue information, characterized in that for filtering the trend component of the clutter received signal by the sea surface reflection. The method of claim 1; In the data conversion step (S320), the azimuth signal, the synchronization signal, and the reflection reception signal are respectively extracted from the antenna and the receiver of the radar, and converted into digital data through a digital signal processing board. Ship safe navigation method through real-time sharing of blue information, characterized in that to obtain data. The method of claim 1; The analyzing step (S330) is to set the analysis target region for measuring the blue information on the radar image data of the PPI method, and converts the time-domain PPI method two-dimensional image data to the frequency domain through a two-dimensional fast Fourier transform algorithm, Vessel safety navigation method through real-time sharing of the wave information, characterized in that to obtain information on the wave by analyzing the data in the set area. delete The method of claim 1; In the step S500, when the analyzed wave information is larger than the alarm set value according to the comparison, the wave height hull collision value is calculated using the wave height of the analyzed wave information, and the calculated wave height hull collision value and the set input hull collision In contrast to the limit value, when the calculated hull collision value is greater than the set input hull collision limit value, the ship navigation method through the real-time sharing of the wave information, characterized in that for modifying the vessel route. The method of claim 1; The step (S700) after the digging hull collision value is recalculated on the basis of the modified ship route, re-contrast the digging hull collision value and the hull collision limit value, the calculated hull hull collision value set input hull collision If it is greater than the limit value, the ship route will be corrected again. Retrieval of wave height hull collision value based on the ship route and correction of ship route according to this value and hull collision limit value result in the risk that the calculated wave height hull collision value is smaller than the set input hull collision limit value. The ship safety navigation method through real-time sharing of the blue information, characterized in that it is repeatedly performed a number of times until this is resolved.

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