A detection system and method integrating secondary surveillance radar for air traffic control, ADS-B, and AIS

Abstract

The present invention relates to a detection system integrating an air traffic control secondary radar, ADS-B, and AIS, and relates to the technical field of radar detection. The detection system includes: a data processing module, a signal receiving module, a first transmitting module, and a second transmitting module; the signal receiving module is used to receive the response signal sent by the test object; the data processing module is used to transmit a first signal to the test object through the first transmitting module; transmit a second signal to the test object through the second transmitting module; the data processing module is further used to receive a test instruction input externally; determine the test object and the test mode according to the test instruction; debug or test the test object according to the response signal received by the signal receiving module and the test mode; determine whether the functions of the test object are normal and / or the performance parameters according to the debugging result or the test result. The present invention can improve the test efficiency of the aircraft radar system.

Description

Technical Field

[0001] The present invention relates to the technical field of radar detection, and in particular to a detection system and method integrating an air traffic control secondary radar, ADS-B, and AIS. Background Art

[0002] An aircraft surveillance and identification system generally integrates an air traffic control secondary radar, an automatic dependent surveillance–broadcast (ADS-B), and an automatic identification system (AIS) for ships. The air traffic control secondary radar and the automatic dependent surveillance–broadcast are a cooperative surveillance and communication system for air traffic control and surveillance, and the automatic identification system for ships is used to monitor ship information at sea and assist in navigation support work.

[0003] Before each flight, it is necessary to detect the air traffic control secondary radar, the automatic dependent surveillance–broadcast, and the automatic identification system for ships.

[0004] However, each of the above systems has a dedicated set of detection equipment, which means that for each test, the tester needs to operate three sets of equipment, resulting in cumbersome operations and reduced test efficiency. Summary of the Invention

[0005] In view of the above analysis, the present invention aims to provide a detection system and method integrating an air traffic control secondary radar, ADS-B, and AIS, which integrates multiple detection devices to improve test efficiency.

[0006] The object of the present invention is mainly achieved through the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a detection system integrating an air traffic control secondary radar, ADS-B, and AIS, including: a data processing module, a signal receiving module, a first transmitting module, and a second transmitting module;

[0008] The signal receiving module is configured to receive a response signal sent by a test object, where the response signal includes: an air traffic control secondary radar signal, an automatic dependent surveillance–broadcast radar signal, or an automatic identification system radar signal for ships;

[0009] The data processing module is configured to transmit a first signal to the test object through the first transmitting module, where the first signal is the air traffic control secondary radar signal or the automatic dependent surveillance–broadcast radar signal; and transmit a second signal to the test object through the second transmitting module, where the second signal is the automatic dependent surveillance–broadcast radar signal;

[0010] The data processing module is further configured to receive a test instruction input externally; determine a test object and a test mode according to the test instruction; debug or test the test object according to the response signal received by the signal receiving module and the test mode; and determine whether the function of the test object is normal and / or performance parameters according to the debug result or test result.

[0011] Further, the first transmitting module and the receiving module share a limiter function unit, and the limiter function unit is disposed in the first transmitting module or the receiving module.

[0012] Further, a control unit is disposed in the first transmitting module or the receiving module, and the control unit is configured to control the first transmitting module or the receiving module to establish a communication connection with the limiter function unit.

[0013] Further, the data processing module is configured to determine the performance parameters of the secondary surveillance radar for air traffic control through debugging; the performance parameters include one or more of response capacity, response power, response sensitivity, dynamic range, and sidelobe suppression level.

[0014] Further, the data processing module is configured to perform the following actions:

[0015] A1. Determine that the test type is a response capacity test according to a first test instruction;

[0016] A2. Transmit an interrogation signal to the test object at a preset interrogation period through the first transmitting module, and the interrogation signal is a secondary surveillance radar signal for air traffic control;

[0017] A3. The data processing module determines a current response probability according to the response signal received by the signal receiving module;

[0018] A4. The data processing module determines whether the current response probability is greater than a critical value;

[0019] A5. When it is determined that the current response probability is greater than a preset critical value, reduce the interrogation period;

[0020] A6. Transmit the interrogation signal to the target to be tested again through the first transmitting module according to the reduced interrogation period;

[0021] A7. Repeat steps A3 - A6 until the current response probability is not greater than the critical value;

[0022] A8. Determine the response capacity according to the number of responses corresponding to the current response probability.

[0023] Further, the data processing module is configured to perform the following actions:

[0024] B1. Determine that the test type is sensitivity and dynamic range test according to the second test instruction;

[0025] B2. Transmit an interrogation signal to the test object through the first transmission module, and the interrogation signal is an air traffic control secondary radar signal;

[0026] B3. Determine the current response probability according to the response signal received by the signal receiving module;

[0027] B4. Determine whether the current response probability is greater than the critical value;

[0028] B5. When it is determined that the current response probability is greater than the preset critical value, increase or decrease the transmission intensity of the interrogation signal through program-controlled attenuation;

[0029] B6. Transmit an interrogation signal to the test target according to the new transmission intensity;

[0030] B7. Repeat B3 - B6 until it is determined that the current response probability is not greater than the critical value;

[0031] B8. Determine the sensitivity or dynamic range according to the transmission intensity of the query signal corresponding to the current response probability.

[0032] Further, the data processing module is used to perform the following actions:

[0033] C1. Determine that the test type is sidelobe suppression test according to the third test instruction;

[0034] C2. Transmit an interrogation signal to the test object through the first transmission module, and the interrogation signal is an air traffic control secondary radar signal;

[0035] C3. Determine the current response probability according to the response signal received by the signal receiving module;

[0036] C4. Determine whether the current response probability is greater than the preset critical value;

[0037] C5. When it is determined that the current response probability is not greater than the critical value, reduce the P2 pulse amplitude;

[0038] C6. Transmit an interrogation signal to the test target according to the new P2 pulse amplitude;

[0039] C7. Repeat C3 - C6 until it is determined that the current response probability is greater than the critical value;

[0040] C8. Determine whether the sidelobe suppression function of the test object is normal according to the signal intensity difference between the P2 pulse corresponding to the current response probability and the P1 pulse corresponding to the current response probability.

[0041] Further, according to the fourth test instruction, the data processing module determines that the test type is the response power test;

[0042] The data processing module extracts the amplitude of the intermediate frequency signal from the response signal received by the signal receiving module;

[0043] The data processing module determines the response power according to the amplitude of the intermediate frequency signal and the attenuation amplitude when receiving the response signal.

[0044] In a second aspect, an embodiment of the present invention provides a detection method integrating an air traffic control secondary radar, ADS-B, and AIS. Based on the system according to any one of the first aspect, the method includes:

[0045] Receiving a test instruction input externally;

[0046] Determining a test object and a test mode according to the test instruction;

[0047] Sending a query signal to the test object according to the test mode;

[0048] Receiving a response signal returned by the test object;

[0049] Debugging or testing the test object according to the test mode and the response signal;

[0050] Determining whether the performance parameters or functions of the test object are normal according to the results of the debugging or testing.

[0051] Further, when the test object is an air traffic control secondary radar, debugging the test object according to the test mode and the response signal includes:

[0052] Determining a current response probability according to the response signal;

[0053] When it is determined that the current response probability does not reach the critical value, continuing to debug the test object according to the test mode until the current response probability reaches the critical value.

[0054] The technical solution provided by the embodiment of the present invention has at least one of the following technical effects:

[0055] 1. Based on the test characteristics of secondary surveillance radar (SSR), Automatic Dependent Surveillance - Broadcast (ADS - B), and Automatic Identification System (AIS), a unified data processing module is set in the detection system to achieve data - processing fusion. Considering that the radar frequency bands of SSR and ADS - B are the same, two transmitting modules are set. The first transmitting module is used to transmit SSR signals and ADS - B signals, and the second transmitting module is used to transmit AIS radar signals, realizing the fusion of radar - signal transmission. A unified receiving module is adopted to achieve the fusion of radar - signal reception. Finally, the detection means corresponding to the three detection targets are integrated into one system, thus reducing the number of detection devices and simplifying the detection process.

[0056] 2. Programs are set in the data - processing module to automatically debug the test object during the performance test, further simplifying the detection process. For example, the performance parameters of SSR can be automatically tested through the program. In addition, in the prior art, the equipment for secondary - radar function testing can only perform function testing, and the equipment for secondary - radar performance testing can only perform performance testing. However, due to the existence of the data - processing module in this application, after the detection system performs function testing, it directly conducts performance testing, thus realizing the fusion of function detection and performance testing.

[0057] 3. During the process of receiving radar signals and transmitting SSR signals and ADS - B signals, amplitude limiting is required. Therefore, the first transmitting module and the receiving module share one amplitude - limiting functional unit, simplifying the structure of the detection system.

[0058] 4. In the prior art, a dedicated instrument is required to calculate the response power. The data - processing module in the present invention can achieve the calculation function of the above - mentioned instrument. Therefore, no additional equipment is needed to calculate the response power during testing, optimizing the detection process.

[0059] Other features and advantages of the present invention will be described in the subsequent specification, and some will become obvious from the specification or be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in the written specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The drawings are only for the purpose of showing specific embodiments and are not considered as a limitation to the present invention. Throughout the drawings, the same reference numerals represent the same components.

[0061] Figure 1 It is a schematic structural diagram of a detection system integrating secondary surveillance radar (SSR), Automatic Dependent Surveillance - Broadcast (ADS - B), and Automatic Identification System (AIS) provided by an embodiment of the present invention;

[0062] Figure 2Schematic structural diagram of another detection system integrating an air traffic control secondary radar, ADS-B, and AIS provided by an embodiment of the present invention

[0063] Figure 3 Schematic diagram of information interaction among components in the detection system integrating an air traffic control secondary radar, ADS-B, and AIS provided by an embodiment of the present invention;

[0064] Figure 4 Flowchart of a detection method integrating an air traffic control secondary radar, ADS-B, and AIS provided by an embodiment of the present invention.

[0065] Reference numerals

[0066] 101 - Data processing module, 102 - Signal receiving module, 103 - First transmitting module, 104 - Second transmitting module. Detailed implementation manners

[0067] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concepts of the present disclosure.

[0068] Before an aircraft takes off, ground crew need to detect the functions and performance of the aircraft. The detection of the functions and performance of the aircraft radar is of utmost importance. Specifically, the radar functions include transmitting function and receiving function; the radar performance includes: response capacity, response power, response sensitivity, dynamic range, and sidelobe suppression level.

[0069] Aircraft radars generally include three types: air traffic control secondary radar, ADS-B, and AIS. Among them, all three radars need to be subjected to function detection, and the air traffic control secondary radar also needs to be subjected to performance detection. In the prior art, ground crew need to prepare at least 3 detection devices for the above detection items, and most detections need to be performed manually, resulting in a cumbersome detection process.

[0070] To solve the above technical problems, an embodiment of the present invention provides a detection system integrating an air traffic control secondary radar, ADS-B, and AIS, as Figure 1 shown, including: a data processing module 101, a signal receiving module 102, a first transmitting module 103, and a second transmitting module 104.

[0071] The signal receiving module 102 is configured to receive response signals sent by a test object. The response signals include: air traffic control secondary radar signals, automatic dependent surveillance - broadcast radar signals, or automatic identification system radar signals for general ships. The test object herein is the air traffic control secondary radar, ADS-B, and / or AIS.

[0072] The data processing module 101 is configured to transmit a first signal to the test object through the first transmitting module 103, and the first signal is an air traffic control secondary radar signal or an automatic dependent surveillance - broadcast (ADS - B) radar signal. The data processing module 101 is further configured to transmit a second signal to the test object through the second transmitting module 104, and the second signal is an automatic dependent surveillance - broadcast (ADS - B) radar signal.

[0073] The data processing module 101 is also configured to receive a test instruction input externally; determine the test object and the test mode according to the test instruction; debug the test object according to the transponder signal received by the signal receiving module 102 and the test mode; and determine whether the functions of the test object are normal and / or its performance parameters according to the debugging result.

[0074] The specific structure of the detection system, such as Figure 2 As shown, the data processing module 101 is arranged in the data processing function area and includes: an analog - to - digital converter (AD), a system - on - a - chip (SOC), and an interface circuit. The system - on - a - chip is electrically connected to the analog - to - digital converter and the system - on - a - chip respectively. The receiving channel and the transmitting channel constitute the signal receiving module 102, the first transmitting module 103, and the second transmitting module 104. Among them, the switch 1, the limiter, the switch 2 in the transmitting channel and the receiving channel constitute the signal receiving module 102. The first transmitting module includes: the switch 1, the limiter, the switch 2 corresponding to the ATC / ADS - B port, the coupler 1, the load 1, the detector, the operational amplifier, the programmable attenuator 1, the transmitting filter 1, the amplifier, and the switch 3. The second transmitting module includes: an attenuator and a transmitting filter corresponding to the AIS port.

[0075] In the embodiment of the present invention, a single data processing module and a receiving module are uniformly used to facilitate the processing of the received radar signals using the same program. The air traffic control secondary radar and ADS - B belong to the same frequency band, so the air traffic control secondary radar signal and the automatic dependent surveillance - broadcast (ADS - B) radar signal share the first transmitting module 103. Limiting is required for both the transceiver processes of the air traffic control secondary radar signal and the ADS - B radar signal. To simplify the equipment and the program, the first transmitting module 103 and the signal receiving module 102 share a limiting functional unit. To distinguish between the air traffic control secondary radar signal and the ADS - B radar signal, a control unit is provided to facilitate the establishment of communication connections between the first transmitting module 103 and the receiving module and the limiting functional unit respectively. The control unit can be software or a switch. Specifically, as Figure 2 shown, the switch 1, the limiter, and the switch 2 constitute the limiting functional unit, and the switch 2 is the control unit. When receiving signals, the switch 2 connects the limiter and the programmable attenuator 2. When transmitting ATC or ADS - B signals, the switch 2 connects the limiter and the coupler 1. It should be noted that the limiting functional unit can be arranged in the first transmitting module 103 or in the signal receiving module 102. Figure 2Only one of the cases is given.

[0076] The signal transmission process of the present invention is as Figure 3 shown. When transmitting ATC or ADS-B signals, the tester sends a test instruction to the SOC through the button set on the display control unit. The SOC generates broadcast data (the broadcast data is in the data format corresponding to ATC or the data format corresponding to ADS-B) according to the test instruction. After AD digital-to-analog conversion, it passes through switch 3 - amplifier - transmit filter 1 - programmable attenuator 1 - coupler 1 - switch 2 - limiter - switch 1 - ATC / ADS-B port, and the broadcast data is transmitted to the test object. During the transmission process, coupler 1 sends a self-check signal to the SOC through a detector and an operational amplifier to perform transmission self-check.

[0077] When transmitting AIS signals, the tester sends a test instruction to the SOC through the button set on the display control unit. The SOC generates broadcast data (the broadcast data is in the data format corresponding to AIS), and after AD digital-to-analog conversion, it is sent to the test object through transmit filter 2 - attenuator - AIS port.

[0078] When receiving signals, the broadcast data sent by the test object passes through ATC / ADS-B port - switch 1 - limiter - switch 2 - programmable attenuator 2 - coupler 2 - band-pass filter, and enters the SOC after AD analog-to-digital conversion. During the receiving process, switch 3 connects the band-pass filter and AD, and the SOC sends a receive self-check signal to coupler 2 through AD, switch 3 and the band-pass filter to perform self-check of the received signal.

[0079] In the embodiment of the present invention, functional detection is mainly performed on ADS-B and AIS. Specifically, the ADS-B function detection method is as follows:

[0080] Through the human-computer interaction system, data processing module 101 receives the test instruction. Data processing module 101 determines the test mode as the ADS-B OUT mode according to the test instruction. Data processing module 101 sets the broadcast data and sends the broadcast data through the first sending module. The tester compares the broadcast data received by the test object with the broadcast data sent by data processing module 101. When the two are consistent, it is determined that the ADS-B IN function of the test object is normal, otherwise it is abnormal.

[0081] Through the human-computer interaction system, the data processing module 101 receives a test instruction. The data processing module 101 determines the test mode as the ADS-B IN mode according to the test instruction, compares the broadcast data received by the signal receiving module 102 with the broadcast data sent by the test object. When the two are consistent, it is determined that the ADS-B OUT function of the test object is normal; otherwise, it is abnormal. It should be noted that the data processing module 101 (SOC) can also send the broadcast data received by the signal receiving module 102 to the display and control unit, and the display and control unit displays the broadcast data received by the signal receiving module 102 to the tester.

[0082] The method for detecting the AIS function is as follows:

[0083] Through the human-computer interaction system, the data processing module 101 receives a test instruction. The data processing module 101 determines the test mode as the AIS transmission mode according to the test instruction. The data processing module 101 sets dynamic information such as the AIS transmission longitude, latitude, and speed, and static information such as the ship name and call sign, and transmits the AIS signal through the second transmission module 104. The tester compares the AIS signal transmitted by the data processing module 101 with the AIS signal received by the test object. When the two are consistent, it is determined that the receiving function of the test object is normal; otherwise, it is abnormal.

[0084] Through the human-computer interaction system, the data processing module 101 receives a test instruction. The data processing module 101 determines the test mode as the AIS receiving mode according to the test instruction, compares the AIS signal received by the receiving module with the AIS signal sent by the test object. When the two are consistent, it is determined that the sending function of the test object is normal; otherwise, it is abnormal. It should be noted that the data processing module 101 (SOC) can also send the broadcast data received by the signal receiving module 102 to the display and control unit, and the display and control unit displays the broadcast data received by the signal receiving module 102 to the tester.

[0085] In the embodiment of the present invention, for the secondary surveillance radar for air traffic control, the tester needs to perform functional tests and performance tests on it. The functional tests include: A-mode function test, C-mode function test, and S-mode function test. The performance tests include: sidelobe suppression test, sensitivity test, dynamic range test, response power test, and response capacity test.

[0086] Specifically, the specific test method for the functional test of the secondary surveillance radar for air traffic control is: the data processing module 101 respectively transmits interrogation signals corresponding to the A, C, and S modes to the test object through the first transmission module 103, and then the receiving module receives the response signals returned by the test object. The data processing module 101 compares whether the response signal matches the interrogation signal. If they match, it indicates that the function of the corresponding mode is normal; otherwise, the function of the corresponding mode is abnormal.

[0087] Specifically, the test method for the response capacity is as follows:

[0088] The data processing module is used to perform the following actions:

[0089] A1. Determine that the test type is the response capacity test according to the first test instruction.

[0090] A2. Transmit an interrogation signal to the test object at a preset interrogation period through the first transmitting module. The interrogation signal is an air traffic control secondary radar signal.

[0091] A3. The data processing module determines the current response probability according to the response signal received by the signal receiving module.

[0092] A4. The data processing module determines whether the current response probability is greater than the critical value. Here, the critical value is 95%.

[0093] A5. When it is determined that the current response probability is greater than the preset critical value, reduce the interrogation period.

[0094] A6. According to the reduced interrogation period, re-transmit the interrogation signal to the target to be tested through the first transmitting module.

[0095] A7. Repeat steps A3 - A6 until the current response probability is not greater than the critical value.

[0096] A8. Determine the response capacity according to the number of response times corresponding to the current response probability.

[0097] Specifically, during automatic testing, the preset interrogation period is 2500 us (400 interrogation times per second). At this time, the response probability of the test object is greater than the critical value of 95%. The interrogation period is continuously reduced in steps of 10 us until the response probability is less than 95%. At this time, the number of interrogation times corresponding to the interrogation period (number of interrogation times = 1 second ÷ interrogation period) is the response capacity of the test object. If the response capacity ≥ 1200, the response capacity function of the test object is normal; otherwise, the response capacity function of the test object is abnormal.

[0098] The test method for the sensitivity and dynamic range is as follows:

[0099] The data processing module is used to perform the following actions:

[0100] B1. Determine that the test type is the sensitivity and dynamic range test according to the second test instruction;

[0101] B2. Transmit an interrogation signal to the test object through the first transmitting module. The interrogation signal is an air traffic control secondary radar signal;

[0102] B3. Determine the current response probability according to the response signal received by the signal receiving module;

[0103] B4. Determine whether the current response probability is greater than the critical value, where the critical value is 95%;

[0104] B5. When it is determined that the current response probability is greater than the preset critical value, increase or decrease the transmission intensity of the interrogation signal through the programmable attenuator 1;

[0105] B6. According to the new transmission intensity, send an interrogation signal to the test target;

[0106] B7. Repeat steps B3 - B6 until it is determined that the current response probability is not greater than the critical value;

[0107] B8. Determine the sensitivity or dynamic range according to the transmission intensity of the query signal corresponding to the current response probability. Among them, the sensitivity corresponds to the minimum transmission intensity, and the dynamic range corresponds to the difference between the maximum transmission intensity and the minimum transmission intensity. When measuring the sensitivity, continuously increase the programmable attenuation; when measuring the dynamic range, continuously decrease the programmable attenuation.

[0108] Specifically, during automatic testing, the preset attenuation value of programmable attenuator 1 is 40 dB. At this time, the response probability of the test object is greater than the critical value of 95%. Continuously increase the programmable attenuation in steps of 1 dB until the response probability is less than 95%. The value of the transmitted signal at this time is the receiving sensitivity of the test object. Then, continuously decrease the programmable attenuation in steps of 1 dB until the response probability returns above the critical value of 95%. Then, keep decreasing the programmable attenuation until the response probability of the test object is below the critical value of 95%. The receiving dynamic range of the test object = the transmitted signal intensity at this time - the receiving sensitivity of the test object.

[0109] The test method for sidelobe suppression is as follows:

[0110] The data processing module is used to perform the following actions:

[0111] C1. According to the third test instruction, determine that the test type is sidelobe suppression test;

[0112] C2. Transmit an interrogation signal to the test object through the first transmitting module, and the interrogation signal is an air traffic control secondary radar signal;

[0113] C3. Determine the current response probability according to the response signal received by the signal receiving module;

[0114] C4. Determine whether the current response probability is greater than the preset critical value, where the critical value is 95%;

[0115] C5. When it is determined that the current response probability is not greater than the critical value, decrease the P2 pulse amplitude through the programmable attenuator 1;

[0116] C6. According to the new P2 pulse amplitude, send an interrogation signal to the test target;

[0117] C7. Repeat the execution of C3 - C6 until it is determined that the current response probability is greater than the critical value;

[0118] C8. Determine whether the sidelobe suppression function of the test object is normal according to the signal strength difference between the P2 pulse corresponding to the current response probability and the P1 pulse corresponding to the current response probability.

[0119] Specifically, during automatic testing, the preset signal strength difference between the P2 pulse and the P1 pulse is P1 - P2 = 0. At this time, the test object has no response. Decrease the intensity of the P2 pulse in steps of 1 dB until the response probability is greater than 95%. If P1 - P2 ≥ 9 dB at this time, the sidelobe suppression function of the test object is normal; otherwise, the sidelobe suppression function of the test object is abnormal.

[0120] The test method for the response power is as follows:

[0121] The data processing module 101 determines that the test type is the response power test according to the fourth test instruction;

[0122] The data processing module 101 extracts the amplitude of the intermediate - frequency signal from the response signal received by the signal receiving module 102;

[0123] The data processing module 101 determines the response power according to the amplitude of the intermediate - frequency signal and the attenuation amplitude when receiving the response signal. In the embodiments of the present invention, the amplitude of the signal is converted into power to determine the power of the response signal.

[0124] Specifically, during power testing, the amplitude of the digital intermediate - frequency signal collected by the data processing module 101 is X dBv, and the corresponding radio - frequency power = 10log[(2 × X ÷ 16384) 2 × 20].

[0125] In the embodiments of the present invention, the tester can also complete the sidelobe suppression test, sensitivity test, dynamic range test, and response capacity test through the detection system in a mainly manually - controlled manner. In this method, all variable changes during the debugging process are set manually. At the same time, this test method needs to be based on the function test, and the specific process is as follows:

[0126] Step 1. Conduct the function test in mode A.

[0127] Step 2. After determining that the function in mode A is normal, conduct the sidelobe suppression test.

[0128] In the embodiments of the present invention, the tester manually sets the signal strength difference between the P2 pulse and the P1 pulse so that the signal strength difference is not greater than 9 dB.

[0129] Step 3. Conduct the function test in mode C.

[0130] Step 4: After determining that the functions of the C mode are normal, perform tests on sensitivity and dynamic range.

[0131] In the embodiment of the present invention, the tester manually sets the increase and decrease of the programmable attenuation.

[0132] Step 5: Set the parameters of the S mode and perform function tests on the S mode.

[0133] Step 6: After determining that the functions of the S mode are normal, perform a response capacity test.

[0134] In the embodiment of the present invention, the tester manually sets the interrogation period.

[0135] The embodiment of the present invention also provides a detection method integrating an air traffic control secondary radar, ADS-B, and AIS. Based on the above detection system, as Figure 4 shown, it includes the following steps:

[0136] Step S1: Receive a test instruction input externally.

[0137] In the embodiment of the present invention, the test instruction is used to indicate the execution of function tests on the air traffic control secondary radar, ADS-B, and AIS, side lobe suppression tests on the air traffic control secondary radar, sensitivity tests, dynamic range tests, response power tests, and response capacity tests.

[0138] Step S2: According to the test instruction, determine the test object and test mode.

[0139] In the embodiment of the present invention, the test objects include: the air traffic control secondary radar, ADS-B, and AIS, and the test modes include: function tests on the air traffic control secondary radar, ADS-B, and AIS, and performance tests on the air traffic control secondary radar.

[0140] Step S3: According to the test mode, send a query signal to the test object.

[0141] Step S4: Receive the response signal returned by the test object.

[0142] Step S5: According to the test mode and the response signal, debug or test the test object.

[0143] In the embodiment of the present invention, for function tests, debugging refers to changing test conditions during performance tests, such as changing the interrogation period, changing the P2 signal strength, and changing the programmable attenuation. For the air traffic control secondary radar, the process of debugging for side lobe suppression tests, sensitivity tests, dynamic range tests, and response capacity tests is as follows: according to the response signal, determine the current response probability; when it is determined that the current response probability has not reached the critical value, continue to debug the test object according to the test mode until the current response probability reaches the critical value.

[0144] Step S6: Determine whether the performance parameters of the test object or the function of the test object are normal according to the results of debugging or testing.

[0145] As described above, the above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A detection system integrating secondary surveillance radar for air traffic control, ADS-B, and AIS, characterized in that, Including: A data processing module, a signal receiving module, a first transmitting module, and a second transmitting module; The signal receiving module is used to receive a response signal sent by a test object, and the response signal includes: an air traffic control secondary radar signal, a broadcast automatic dependent surveillance - radar signal, or a universal ship automatic identification system radar signal; the first transmitting module and the signal receiving module share a limiting function unit, and the limiting function unit includes a limiter and two switches; wherein, the test object is an aircraft; The data processing module is used to transmit a first signal to the test object through the first transmitting module, and the first signal is the air traffic control secondary radar signal or the broadcast automatic dependent surveillance - radar signal; transmit a second signal to the test object through the second transmitting module, and the second signal is a universal ship automatic identification system radar signal; The data processing module is further used to receive a test instruction input externally; determine the test object and the test mode according to the test instruction; debug or test the test object according to the response signal received by the signal receiving module and the test mode; determine whether the function of the test object is normal and / or its performance parameters according to the debugging result or the test result; The data processing module determines that the test type is response power test according to the fourth test instruction; The data processing module extracts the amplitude of the intermediate - frequency signal from the response signal received by the signal receiving module; The data processing module determines the response power according to the amplitude of the intermediate - frequency signal and the attenuation amplitude when receiving the response signal; If the amplitude of the collected digital intermediate - frequency signal is X, then the response power = 10log[(2×X÷16384)²×20]; The data processing module is used to determine the performance parameters of the air traffic control secondary radar through debugging; the performance parameters include one or more of response capacity, response power, response sensitivity, dynamic range, and sidelobe suppression level; The data processing module is used to perform the following actions: A1. Determine that the test type is response capacity test according to the first test instruction; A2. Transmit an interrogation signal to the test object through the first transmitting module at a preset interrogation period, and the interrogation signal is an air traffic control secondary radar signal; A3. The data processing module determines the current response probability according to the response signal received by the signal receiving module; A4. The data processing module determines whether the current response probability is greater than a critical value; A5. When it is determined that the current response probability is greater than the preset critical value, reduce the interrogation period; A6. Transmit the interrogation signal to the target to be tested again through the first transmitting module according to the reduced interrogation period; A7. Repeat steps A3 - A6 until the current response probability is not greater than the critical value; A8. Determine the response capacity according to the number of responses corresponding to the current response probability.

2. The system according to claim 1, wherein The data processing module is used to perform the following actions: B1. Determine that the test type is sensitivity and dynamic range test according to the second test instruction; B2. Transmit an interrogation signal to the test object through the first transmission module, where the interrogation signal is an air traffic control secondary radar signal; B3. Determine the current response probability according to the response signal received by the signal reception module; B4. Determine whether the current response probability is greater than a critical value; B5. When it is determined that the current response probability is greater than a preset critical value, increase or decrease the transmission intensity of the interrogation signal through program-controlled attenuation; B4. Transmit an interrogation signal to the test object according to the new transmission intensity; B7. Repeat steps B3 - B6 until it is determined that the current response probability is not greater than the critical value; B8. Determine the sensitivity or dynamic range according to the transmission intensity of the query signal corresponding to the current response probability.

3. The system according to claim 1, wherein: The data processing module is used to perform the following actions: C1. Determine that the test type is sidelobe suppression test according to the third test instruction; C2. Transmit an interrogation signal to the test object through the first transmission module, where the interrogation signal is an air traffic control secondary radar signal; C3. Determine the current response probability according to the response signal received by the signal reception module; C4. Determine whether the current response probability is greater than a preset critical value; C5. When it is determined that the current response probability is not greater than the critical value, decrease the P2 pulse amplitude; C6. Transmit an interrogation signal to the test object according to the new P2 pulse amplitude; C7. Repeat steps C3 - C6 until it is determined that the current response probability is greater than the critical value; C8. Determine whether the sidelobe suppression function of the test object is normal according to the signal intensity difference between the P2 pulse corresponding to the current response probability and the P1 pulse corresponding to the current response probability.

4. A detection method integrating secondary surveillance radar, ADS-B, and AIS, based on the system described in claims 1-3, characterized in that Comprising: Receiving an externally input test instruction; Determining the test object and test mode according to the test instruction; Sending a query signal to the test object according to the test mode; Receiving the response signal returned by the test object; Debugging or testing the test object according to the test mode and the response signal; Determining whether the performance parameters or functions of the test object are normal according to the results of the debugging or testing.

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