Digital Reikang and display method and system on marine radar screen

Abstract

The invention provides a digital Reikang and a display method and system on a marine radar screen, and the method comprises the steps: replying a digital signal identification code containing a Reikang identity through wireless communication after the Reikang receives a main lobe trigger signal of a radar; and the radar decodes the digital signal identification code after receiving the digital signal identification code of the Reikang, and generates and displays a corresponding Morse code pattern in the radial outward direction at the screen position of the Reikang according to the distance and orientation of the Reikang acquired by the radar.

Description

Technical Field

[0001] The invention belongs to the technical field of radio navigation, and in particular relates to a digital radar and a display method and system on a marine radar screen. Background Art

[0002] A radar beacon, also known as a radar beacon, is a navigation aid used to identify buoys, lighthouses, ports, coasts and other objects of navigational significance. When a radar interrogation signal is detected, the radar beacon generates a Morse coded response signal representing a specific meaning.

[0003] Existing radar transponders are mainly implemented in a frequency-agile manner. Frequency-agile radar transponders contain additional circuits to measure the frequency of each received interrogation pulse and quickly tune the frequency of the reply signal to match it.

[0004] The mainstream frequency-agile radar transponder currently in use is an analog transponder, and its working principle is: the starting frequency and pulse width of the required response waveform are obtained through detection, main lobe detection and frequency measurement circuits, and after obtaining the starting frequency, a point frequency pulse response signal is generated through a voltage-controlled oscillator. The response waveform generated by the voltage-controlled oscillator is output after passing through a gate switch, and the gate time of the gate switch is controlled by the Morse code value.

[0005] The current mainstream radar transponder system has the following shortcomings: 1) It is sensitive to radar transmission waveform and signal processing system, and can only be applied to narrowband and simple modulation radar waveforms, but cannot adapt to the new system wideband and complex modulation waveforms, which limits the application of new system radar in the field of marine radar; 2) If the background of Leikang is not the sea, but an island, land or mountain, the Morse code will be submerged in these targets and cannot be identified, which greatly limits the deployment environment and application of Leikang. Summary of the invention

[0006] Consider that after receiving the main lobe trigger signal of the radar, the traditional radar will reply with a string of signals containing Morse code information according to the frequency of the detected radar, and the Morse code constructed by the three basic symbols of "dot", "space" and "dash" will be displayed on the radar screen.

[0007] However, the traditional way of working of radarcon makes it impossible for radar to distinguish between radarcon signals and target signals, and thus it is impossible to display Morse code in different colors (the radar display screen itself can support the display of different colors, but the existing mechanism cannot distinguish different signals, so it is impossible to achieve differentiated display such as different colors). Therefore, if there are a large number of target reflection signals at the location where the Morse code is displayed, such as islands, plains or even hills and mountains, the Morse code cannot be displayed and is submerged in the target.

[0008] In view of the defects and shortcomings of the prior art, the purpose of the present invention is to provide a digital radar and a display method and system on a marine radar screen, so as to solve the problem of the distinction of radar recognition and greatly expand the applicable environment and scenarios of radar.

[0009] The present invention specifically adopts the following technical solutions: A digital radar and a method for displaying it on a marine radar screen: after receiving a main lobe trigger signal from the radar, the radar replies with a digital signal identification code containing the identity of the radar through wireless communication; after receiving the digital signal identification code from the radar, the radar decodes it and generates and displays a corresponding Morse code pattern in a radially outward direction at the screen position where the radar is located according to the distance and azimuth of the radar acquired by the radar.

[0010] Furthermore, the radar generates Morse code by presetting a Morse code pattern corresponding to a digital signal identification code, and adjusting the total length of the Morse code accordingly according to the range on the radar display screen and the position of the radar camera.

[0011] Furthermore, the target and Morse code pattern corresponding to the radar detection signal are displayed on the radar display screen in different colors.

[0012] Furthermore, the Morse code patterns corresponding to the digital signal identification codes of different radars are displayed on the radar display screen in the same or different colors.

[0013] Furthermore, Morse code is displayed in an intermittent manner.

[0014] Furthermore, the Leikang replies with a digital signal identification code containing the Leikang identity through wireless communication using a frequency band different from that of radar detection.

[0015] And, a digital radar and a display system on a marine radar screen, comprising: a digital radar and a radar display module; after receiving a main lobe trigger signal from the radar, the digital radar replies with a digital signal identification code including the radar identity through wireless communication; after receiving the digital signal identification code from the radar, the radar display module decodes it and generates and displays a corresponding Morse code pattern in a radially outward direction at the screen position where the radar is located according to the distance and azimuth of the radar acquired by the radar.

[0016] Furthermore, the radar display module pre-sets a Morse code pattern corresponding to the digital signal identification code, and adjusts the total length of the Morse code accordingly according to the range on the radar display screen and the position of the radar sensor.

[0017] Compared with the prior art, the core difference of the present invention and its preferred solution is that Leikang encapsulates information through digital coding and utilizes the principle of wireless communication to hand over the decoding and display planning to the radar side. This avoids the problem that the traditional solution requires Leikang to continuously send response information and has no recognition and distinction between other target detection information and Leikang information; it avoids the problem that traditional Leikang cannot respond to solid-state radar signals; it makes full use of the display capability of the radar screen, so that both detection and response information can be highly distinguished and intuitively displayed; on the other hand, it greatly expands the applicable environment and scenarios of Leikang, so that it can be deployed on the shore or even in more complex terrain scenarios to give full play to the value of the beacon. DETAILED DESCRIPTION

[0018] In order to make the features and advantages of this patent more obvious and easy to understand, the following embodiments are specifically described in detail as follows: The technical solution of the present invention is further described below in conjunction with embodiments.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those within the scope of this description. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0020] In the design of the embodiment of the present invention, after receiving the main lobe trigger signal of the radar, the Leikang uses radio communication to encode it (the encoding method can use a general radio encoding method, for example, the communication encoding scheme of the ERPS positioning system can be referred to), and replies with a digital signal identification code containing the Leikang's identity, including the name of the Morse code assigned by the Leikang itself. The radar decodes the digital signal of the Leikang immediately after receiving it. Then, according to the distance and direction of the Leikang tested by the radar, the corresponding Morse code constructed by the three basic symbols of "dot", "space" and "dash" is generated and displayed at the screen position where the Leikang is located.

[0021] The specific generation method of radar is: the radar pre-sets the pattern information of each Morse code in the system, which is a pattern information composed of "line", "dot" and "space" with a certain width. The library that stores various Morse code pattern information is called the Morse code library. It is just like the Chinese character library that stores the graphic information of each Chinese character in the computer system. When the radar receives the name of the Morse code of the Lei Kang, it will call out the corresponding Morse code pattern information from the Morse code library of the radar. Then, according to the range on the radar display and the position of the Lei Kang, the total length of the Morse code is adjusted accordingly (generally not more than 20% of the radar range), and the Morse code is generated in the radial outward direction of the Lei Kang position using a color different from the target color on the screen, so that the Morse code can be clearly displayed on the radar screen.

[0022] In order to distinguish it from the background target, the radar needs to display the Morse code in different colors according to the target color selected by the user. And if the user adjusts the target color, the radar also needs to make corresponding adjustments to distinguish it, so as to highlight the display effect of the Morse code.

[0023] At the same time, Morse code is displayed intermittently (according to the requirements of IALA / IGO and IMO, etc.), so that seafarers can also see the target information of the location covered by the Morse code.

[0024] In summary, the Leikang provided by the embodiment of the present invention uses the communication function of the radar to replace the detection function of the radar used by the conventional Leikang. The Leikang replies to the radar with a digital signal. Therefore, the Leikang is transformed into a digital Leikang.

[0025] Therefore, in order to reduce the impact on the radar's detection function, you can: 1) Choose different frequency bands to realize the functions of digital radar. For example, X-band radar detection uses the 9.3-9.5G frequency band, and digital radar can consider using the 9.20-9.30G frequency band.

[0026] 2) In actual use, the radar can add a digital radar function button, which can be implemented directly in the software without adding additional hardware to the radar. It can be turned on when needed to transmit the trigger signal of the digital radar to trigger the response of the digital radar.

[0027] 3) The frequency band of the digital radar should be as wide as possible so that the radar can freely choose the transmission frequency and reduce the probability of different radars using the same frequency. The above design can be achieved at low cost by using the function that the signal transmission frequency of the solid-state radar can be adjusted autonomously within the frequency band.

[0028] Application examples: Let’s take Morse code as an example. Morse code “N” is composed of “line”, “space” and “dot”. What is displayed on the radar screen is “ ”.

[0029] The Raycon responds to the trigger radar with a digital signal containing the Morse code "N". The radar decodes it after receiving it, and then calls up the Morse code graphic of "N" from the Morse code library. The display result is: 1) If the radar has a range of 6 nautical miles, set the total length of the Morse code to 1.2 nautical miles; 2) If the target color selected by the user is red, the Morse code can select yellow to cover or replace the overlapping target color.

[0030] 3) Morse code can be displayed intermittently, for example, 15 seconds on and 15 seconds off, so that the crew can see the target information covered.

[0031] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

[0032] Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for displaying a digital radar on a marine radar screen, characterized in that: After receiving the main lobe trigger signal from the radar, the radar replies with a digital signal identification code containing the identity of the radar through wireless communication; after receiving the digital signal identification code of the radar, the radar decodes it and generates and displays the corresponding Morse code pattern in the radial outward direction at the screen position where the radar is located according to the distance and direction of the radar.

2. The method for displaying a digital radar on a marine radar screen according to claim 1, characterized in that: The radar generates Morse code by presetting a Morse code pattern corresponding to a digital signal identification code, and adjusting the total length of the Morse code accordingly according to the range on the radar display screen and the position of the radar camera.

3. The method for displaying a digital radar on a marine radar screen according to claim 2, characterized in that: The target and Morse code pattern corresponding to the radar detection signal are displayed on the radar display screen in different colors.

4. The method for displaying the digital radar on the marine radar screen according to claim 3 is characterized in that: The Morse code patterns corresponding to the digital signal identification codes of different radars are displayed on the radar screen in the same or different colors.

5. The method for displaying a digital radar on a marine radar screen according to claim 1, characterized in that: Morse code is displayed intermittently.

6. The method for displaying a digital radar on a marine radar screen according to claim 1, characterized in that: The Leikang replies with a digital signal identification code containing the Leikang identity through wireless communication using a frequency band different from that of radar detection.

7. A digital radar and display system on a marine radar screen, characterized in that: include: A digital radar camera and a radar display module; after receiving a main lobe trigger signal from the radar, the digital radar camera replies with a digital signal identification code including the radar camera's identity through wireless communication; after receiving the digital signal identification code from the radar camera, the radar display module decodes the code and generates and displays a corresponding Morse code pattern in a radially outward direction at the screen position where the radar camera is located according to the distance and azimuth of the radar camera acquired by the radar.

8. The digital radar and display system on the marine radar screen according to claim 1, characterized in that: The radar display module pre-sets the Morse code pattern corresponding to the digital signal identification code, and adjusts the total length of the Morse code accordingly according to the range on the radar display screen and the position of the radar camera.

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