A mission reliability improvement method based on pan-secondary radar

Abstract

The present invention discloses a method for improving mission reliability based on a pan-secondary radar, comprising: enabling an interrogator or auxiliary interrogation resource of an interrogation end to interrogate a target according to target location information; enabling corresponding answering resources of an answering end to receive an interrogation signal and transmit an answering signal according to an interrogation signal; judging whether the interrogation end receives an answering signal, and if so, processing the answering signal to obtain target-related information, otherwise the establishment of an information exchange channel fails. The present invention improves the reliability of the interrogation-answering information acquisition method with the aid of auxiliary resources, and solves the problem of no answering caused by factors such as the target having no answering machine, the answering machine not being turned on, the answering machine failing, or the antenna being shielded, or the answering machine being occupied when using a secondary radar.

Description

Technical Field

[0001] The present invention belongs to the technical field of radar communication, and in particular relates to a method for improving mission reliability based on a pan-secondary radar. Background Art

[0002] Secondary radar is a system where the interrogator transmits a set of interrogation coded signals through the antenna, the transponder detects the interrogation coded signals, and determines the content of the coded signals, and then the transponder transmits a set of reply coded signals. The reply signal is detected and processed by the interrogator to measure the distance and direction of the target and obtain the content of the reply code. Secondary radar has many advantages that primary radar does not have. First, since the positioning of the target is based on two active radiations, the transmission power is much lower than that of the primary radar for the same detection distance, and the volume and mass are also reduced accordingly; secondly, the altitude information of the secondary radar is generated by the altimeter of the platform, which is much more accurate than that of the primary radar; finally, it can use coded signals to exchange information, and can provide crisis warning information when the aircraft fails, the communication system fails, or encounters hijacking. At present, secondary radar is widely used in air traffic control (secondary surveillance radar, air collision avoidance system, etc.) and military fields (friend-or-foe identification). It usually uses directional antennas with high directivity to achieve directional interrogation, and omnidirectional antennas to achieve omnidirectional reply.

[0003] From the working principle of secondary radar, it can be seen that the use of secondary radar is limited to a certain extent due to the need for the coordination of the interrogator and the transponder. It can be summarized into the following two aspects:

[0004] (1) The target platform must be equipped with a transponder, otherwise it cannot receive interrogation signals and transmit response signals, which greatly limits the scope of use of secondary radar. Although most aircraft must be equipped with transponders according to regulations, with the rapid development of drones, small drones with limited load capacity and space have also been widely used. Since they are not equipped with transponders, it is difficult to obtain detailed information about the target through the interrogation-response method.

[0005] (2) If the information exchange is not ideal due to objective environment during the collaborative process, and if the information exchange channel is disrupted (not turned on, faulty, antenna blocked, etc.) or occupied (in existing secondary radars, since the transponder response capacity is fixed, the transponder implements the principle of first-ask-first-answer. When the transponder is responding to the current interrogation and has not yet recovered, it will not respond to any other correct interrogation signal, that is, the transponder is "occupied"), this working mode may lose its effectiveness and its reliability needs to be improved.

[0006] In the actual use environment, one of the prerequisites for ensuring that the secondary radar function can be fully realized is that the information exchange link and structure between the interrogator and the responder in the system cannot be damaged. However, the current secondary radar requires the target platform to be equipped with a transponder, and there are problems such as failure to turn on, failure, antenna shielding, and transponder occupation. The reliability of the secondary radar system cannot be guaranteed. Therefore, it is urgent to study some new technologies and means to improve the robustness and reliability of the system. Summary of the invention

[0007] In view of the problem of no response when using secondary radar due to factors such as the target having no transponder, the transponder not being turned on, the transponder malfunctioning, the antenna being shielded, the transponder being occupied, etc., the present invention provides a method for improving mission reliability based on pan-secondary radar to improve the reliability of the information acquisition method of inquiry-response.

[0008] The present invention is achieved through the following technical solutions:

[0009] A mission reliability improvement method based on pan-secondary radar, applied to the interrogation end, includes:

[0010] The interrogator or auxiliary interrogation resource is started to conduct target interrogation based on the target position information and the received response signal.

[0011] Preferably, the inquiry step of the present invention specifically includes the following steps:

[0012] Extracting interrogation resources that can transmit and receive electromagnetic signals, work normally and are in an idle state, forming a list of available interrogation resources, and refreshing it at a preset frequency;

[0013] The interrogator is started to interrogate the target according to the target location information, and if a response signal is received, it is processed to obtain target related information;

[0014] If the interrogator fails to work properly or no response signal is received after interrogation by the interrogator, all auxiliary interrogation resources in the available interrogation resource list are simultaneously activated to interrogate the target respectively and prepare to receive the target's response signal;

[0015] If there is a response signal, the response signal is processed to obtain target related information, otherwise the information exchange channel establishment fails.

[0016] Preferably, the auxiliary interrogation resources of the present invention are resources capable of transmitting, receiving and processing electromagnetic signals, including at least one of radar, communication and electronic warfare systems.

[0017] Preferably, the present invention refreshes the available query resource list at a frequency of 0.1 Hz.

[0018] In a second aspect, the present invention proposes a method for improving mission reliability based on a pan-secondary radar, which is applied to a response end and includes:

[0019] According to the inquiry signal transmitted by the inquiry end interrogator or the auxiliary interrogation resource, the corresponding response resource is used to receive the inquiry signal and transmit the response signal.

[0020] Preferably, the steps of receiving the inquiry signal and transmitting the response signal of the present invention specifically include:

[0021] Extracting the reply resources that can transmit and receive electromagnetic signals, work normally and are in an idle state, forming a list of available reply resources, refreshing the list at a preset frequency, and configuring the working parameters so that the reply resources work in an inquiry signal receiving state;

[0022] If the interrogation signal transmitted by the interrogator is received and the transponder is working normally, the transponder receives the interrogation signal, processes the interrogation signal and transmits a response signal through the transponder;

[0023] The inquiry signal transmitted by the matching auxiliary inquiry resource is received and processed correspondingly by the auxiliary answer resource in the available answer resource list to form a matching answer resource list;

[0024] Determine whether the transponder has answered. If it has answered, the answering ends; otherwise, select a matching answering resource to transmit an answering signal.

[0025] Preferably, the present invention refreshes the available response resource list at a frequency of 0.1 Hz.

[0026] Preferably, the auxiliary response resources of the present invention are resources capable of transmitting, receiving and processing electromagnetic signals, including at least one of radar, communication and electronic warfare systems.

[0027] In a third aspect, the present invention proposes a method for improving mission reliability based on a pan-secondary radar, the method comprising:

[0028] The interrogator or auxiliary interrogation resource at the interrogation end is enabled to interrogate the target according to the target position information;

[0029] According to the inquiry signal, enabling the corresponding response resource of the response end to receive the inquiry signal and transmit the response signal;

[0030] Determine whether the inquiry end receives the response signal. If so, process the response signal to obtain target-related information. Otherwise, the information exchange channel fails to be established.

[0031] The present invention has the following advantages and beneficial effects:

[0032] Since the secondary radar needs two transmissions and two receptions to complete information exchange, if the information exchange channel is interfered with and destroyed (such as when the machine is turned on, the machine fails, the antenna is shielded, the transponder is occupied, etc.), this working mode may lose its function. The present invention realizes the secondary radar function by using various idle resources with the ability to transmit and receive electromagnetic signals, such as radar, shortwave communication system, ultra-shortwave communication system, satellite communication system, etc., to prevent the function from being unable to be realized when the transponder is abnormal. At the same time, the multi-channel anti-interference performance is better than that of a single channel, which enhances the survivability of the secondary radar and its adaptability to the use environment, and improves the mission reliability of the secondary radar.

[0033] Although most aircraft must be equipped with transponders according to regulations, it is difficult to equip aircraft with limited load capacity and space (such as small drones). The current secondary radar system cannot obtain their detailed information and it is difficult to effectively monitor them. The present invention realizes question and answer by using idle resources such as measurement and control chains that have the ability to transmit and receive electromagnetic signals, thereby incorporating them into the monitoring range of secondary radars and expanding the scope of use of secondary radars. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0035] Figure 1 The figure is a schematic diagram of an inquiry process according to an embodiment of the present invention.

[0036] Figure 2 This is a principle block diagram of the inquiry end according to an embodiment of the present invention.

[0037] Figure 3 The figure is a schematic diagram of a response flow of an embodiment of the present invention.

[0038] Figure 4 This is a principle block diagram of the response end of an embodiment of the present invention.

[0039] Figure 5 Schematic diagram of query-response interaction according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0041] Example 1

[0042] This embodiment provides a method for improving mission reliability based on a pan-secondary radar. The method is applied to an interrogation end electronic system, and an interrogator or auxiliary interrogation resources are started to conduct an interrogation according to target location information and received response information.

[0043] Specific as Figure 1 As shown, the inquiry process of this embodiment specifically includes the following steps:

[0044] S101, extracting inquiry resources that can transmit and receive electromagnetic signals, work normally and are in an idle state, forming an available inquiry resource list, and refreshing it at a preset frequency.

[0045] The inquiry resources of this embodiment include an inquiry machine and auxiliary inquiry resources, wherein the auxiliary inquiry resources include inquiry resource 1, inquiry resource 2...inquiry resource n, and the auxiliary inquiry resources may be one or more of radar, shortwave communication system, ultra-shortwave communication system, measurement and control chain, and satellite communication system.

[0046] The refresh frequency of this embodiment may be 0.1 Hz.

[0047] S102, based on the target location information, the interrogator is activated to interrogate the target, and if a response signal is received, the response signal is processed to obtain target related information.

[0048] S103, if the interrogator cannot work normally or no response signal is received after interrogation by the interrogator, all auxiliary interrogation resources in the available interrogation resource list are simultaneously activated to interrogate the target respectively and prepare to receive the target's response signal.

[0049] S104, if there is a response signal, the response signal is processed to obtain target related information, otherwise the information exchange channel fails to be established.

[0050] like Figure 2 As shown, the interrogation end hardware of this embodiment includes an interrogator, auxiliary interrogation resources capable of transmitting and receiving electromagnetic signals (such as radar, shortwave communication system, ultra-shortwave communication system, measurement and control chain, satellite communication system, etc.), and a general interrogation processing module.

[0051] Among them, the inquiry resources mainly include antenna apertures, antenna interface units and RF front ends of various systems such as interrogators, shortwave communication systems and satellite communication systems.

[0052] The RF front end mainly consists of receiver switch, receiver, preprocessor, transmitter and modulator.

[0053] The general inquiry processing module is located in the general integrated processor at the inquiry end, and mainly completes functions such as signal processing, information processing and inquiry waveform parameter configuration.

[0054] Example 2

[0055] This embodiment proposes a method for improving mission reliability based on a pan-secondary radar. The method is applied to a transponder electronic system, and according to the situation of an interrogation signal, a transponder or a matching auxiliary response resource is enabled to respond.

[0056] Specific as Figure 3 As shown, the method comprises the following steps:

[0057] Step 201, extracting the response resources that can transmit and receive electromagnetic signals, work normally and are in an idle state, forming an available response resource list, refreshing it at a preset frequency, and configuring the working parameters so that the response resources work in an inquiry signal receiving state.

[0058] The response resources of this embodiment include a transponder and auxiliary response resources, wherein the auxiliary response resources include response resource 1, response resource 2...response resource m, and the auxiliary response resources may be one or more of a radar, a shortwave communication system, an ultrashortwave communication system, a measurement and control chain, and a satellite communication system.

[0059] The refresh frequency of this embodiment is 0.1 Hz.

[0060] Step 202: If the interrogation signal transmitted by the interrogator is received and the transponder is working normally, the transponder receives the interrogation signal, processes the interrogation signal and transmits a response signal through the transponder.

[0061] Step 203: The inquiry signal transmitted by the matching auxiliary inquiry resource is received and processed by the auxiliary answer resource in the available answer resource list to form a matching answer resource list.

[0062] In this embodiment, the matching method used is specifically to determine whether the operating frequency bands of the two are consistent. If they are consistent, they are matched, otherwise they are not matched.

[0063] In this embodiment, the auxiliary response resources 1-m are matched with the auxiliary inquiry resources 1-n to form matching response resource lists 1-o.

[0064] Step 204, determine whether the answering machine has answered, if it has answered, then the answering ends; otherwise, select a matching answering resource to transmit an answering signal.

[0065] Specific as Figure 4 As shown, the answering end of this embodiment mainly includes an answering machine, auxiliary answering resources (such as radar, short wave communication system, ultra short wave communication system, measurement and control chain, satellite communication system, etc.) capable of receiving and transmitting electromagnetic signals, and a general answering processing module.

[0066] Among them, the response resources mainly include antenna apertures, antenna interface units and RF front ends (mainly composed of receiver switches, receivers, preprocessors, transmitters and modulators, etc.) of various systems such as transponders, shortwave communication systems and satellite communication systems.

[0067] The general response processing module is located in the general integrated processor of the response end server, and is mainly used to complete signal processing, information processing and response waveform parameter configuration.

[0068] Example 3

[0069] This embodiment proposes a method for improving mission reliability based on a pan-secondary radar. The method is implemented based on an electronic system. Specifically, Figure 5 As shown, the method of this embodiment includes:

[0070] Step 301: Inquiry of the target is performed by activating the interrogator or auxiliary interrogation resource of the interrogation end according to the target location information. In this embodiment, the interrogation process of step 301 is as described in the above embodiment 1, which will not be described in detail here.

[0071] Step 302: according to the inquiry signal, enable the corresponding transponder or auxiliary answering resource of the answering end to receive the inquiry signal and transmit the answering signal. In this embodiment, the answering process of step 302 is as described in the above embodiment 2, which will not be repeated here.

[0072] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for improving mission reliability based on pan-secondary radar, characterized in that: Applied to the inquiry end, including: According to the target location information and the situation of receiving the response signal, the interrogator or the auxiliary interrogation resource is started to interrogate the target; the interrogation step specifically includes the following steps: Extracting interrogation resources that can transmit and receive electromagnetic signals, work normally and are in an idle state, forming a list of available interrogation resources, and refreshing it at a preset frequency; The interrogator is started to interrogate the target according to the target location information, and if a response signal is received, it is processed to obtain target related information; If the interrogator fails to work properly or no response signal is received after interrogation by the interrogator, all auxiliary interrogation resources in the available interrogation resource list are simultaneously activated to interrogate the target respectively and prepare to receive the target's response signal; If there is a response signal, the response signal is processed to obtain target related information, otherwise the information exchange channel establishment fails.

2. The method for improving mission reliability based on pan-secondary radar according to claim 1, characterized in that: The auxiliary interrogation resources are resources capable of transmitting, receiving and processing electromagnetic signals, including at least one of radar, communication and electronic warfare systems.

3. The method for improving mission reliability based on pan-secondary radar according to claim 1, characterized in that: The available query resource list is refreshed at a frequency of 0.1 Hz.

4. A method for improving mission reliability based on pan-secondary radar, characterized in that: Applied to the answering end, including: According to the inquiry signal transmitted by the inquiry end interrogator or the auxiliary inquiry resource, the corresponding response resource is used to receive the inquiry signal and transmit the response signal; wherein the inquiry end transmits the inquiry signal using the method described in any one of claims 1-3.

5. The method for improving mission reliability based on pan-secondary radar according to claim 4 is characterized in that: The steps of receiving the inquiry signal and transmitting the response signal specifically include: Extracting the reply resources that can transmit and receive electromagnetic signals, work normally and are in an idle state, forming a list of available reply resources, refreshing the list at a preset frequency, and configuring the working parameters so that the reply resources work in an inquiry signal receiving state; If the interrogation signal transmitted by the interrogator is received and the transponder is working normally, the transponder receives the interrogation signal, processes the interrogation signal and transmits a response signal through the transponder; The inquiry signal transmitted by the matching auxiliary inquiry resource is received and processed correspondingly by the auxiliary answer resource in the available answer resource list to form a matching answer resource list; Determine whether the transponder has answered. If it has answered, the answering ends; otherwise, select a matching answering resource to transmit an answering signal.

6. The method for improving mission reliability based on pan-secondary radar according to claim 5, characterized in that: The available response resource list is refreshed at a frequency of 0.1 Hz.

7. The method for improving mission reliability based on pan-secondary radar according to claim 5, characterized in that: The auxiliary response resources are resources capable of transmitting, receiving and processing electromagnetic signals, including at least one of radar, communication and electronic warfare systems.

8. A method for improving mission reliability based on pan-secondary radar, characterized in that: The method includes: The interrogator or auxiliary interrogation resource at the interrogation end is enabled to interrogate the target according to the target position information; According to the inquiry signal, enabling the corresponding response resource of the response end to receive the inquiry signal and transmit the response signal; Determine whether the inquiry end receives the response signal. If yes, process the response signal to obtain target related information. Otherwise, the information exchange channel fails to be established. Wherein, the query end uses the method described in any one of claims 1 to 3 to query the target; The responding end receives the inquiry signal and transmits the response signal using the method described in any one of claims 4 to 7.

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