CN113945879B - Method and system for detecting signal source of responder of air traffic warning system - Google Patents
Method and system for detecting signal source of responder of air traffic warning system Download PDFInfo
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Abstract
The invention relates to a method and a system for detecting a transponder signal source of an air traffic warning system, belongs to the technical field of radio electricity, and solves the problems that the transponder signal source cannot be detected independently and a special detection method is not available in the prior art. The method comprises the steps of disconnecting a signal transmission channel between a receiving module and an intermediate frequency module of a responder signal source, so that an empty pipe responder tester outputs a radio frequency signal to the intermediate frequency module as an input signal; selecting an input detection mode, and entering a pulse channel test mode of a transponder signal source; controlling a signal source of the responder to receive an input signal and calling a query instruction of a peak power analyzer to obtain an input measured value; and connecting the empty pipe responder tester to the peak power analyzer, outputting the same radio frequency signal, calling a query command of the peak power analyzer to obtain an input nominal value, taking the difference value between the input nominal value and the input measured value as an input detection result, and displaying the input detection result to a control interface. The method realizes the independent detection of the signal source of the transponder and the verification of the parameter index.
Description
Technical Field
The invention relates to the technical field of radio electricity, in particular to a method and a system for detecting a signal source of a responder of an air traffic warning system.
Background
The transponder signal source of the air Traffic warning System is mainly used for detecting a Traffic Collision Avoidance System (TCAS). The TCAS is a control and processing core system installed in medium and large aircraft. The signal source of the transponder of the air traffic warning system is used for testing an air traffic warning anti-collision system and a collision avoidance system, and the TCAS system belongs to an important flight safety system in the air traffic radio profession. The air traffic warning system and related communication equipment of civil aviation airplanes in China are mainly developed and produced by American Africa corporation, such as air traffic warning system responder signal sources, responders/distance measuring testers, air management responder testers and other aviation representative systems and testing equipment. The technical failure of these systems and test equipment results in difficult use and expansion, low utilization rate and poor core technology competitiveness.
At present, the detection of aviation equipment in the aviation design industry is mainly aimed at special aviation metering and calibrating instruments, special instruments and meters, equipment and the like, and no special detection method exists for an air traffic warning system transponder signal source which relates to multiple specialties and an integrated air traffic warning system, a radar communication system and a computer.
The air traffic warning system transponder signal source is used for simulating functions of airplane response, flight scene simulation and the like, and needs to be integrated with a transponder/ranging test system and a remote processing unit subsystem for normal work, so that the whole system is very large, the driving normal working pulse power of the air traffic warning system transponder signal source in a response receiving working circuit is more than 1000W, detection is very inconvenient under the condition of laboratory simulation test, and the maximum pulse power of the radio frequency signal output of instruments in a laboratory is only 1W; in addition, the air traffic warning collision avoidance system response signal source does not reserve a corresponding detection interface in the design, does not provide an operation interface for controlling a corresponding function, and cannot conveniently detect and acquire a detection result.
Disclosure of Invention
In view of the foregoing analysis, embodiments of the present invention are directed to providing a method and a system for detecting a transponder signal source of an air traffic warning system, so as to solve the problem that the existing method and system cannot detect the transponder signal source alone and do not have a dedicated detection method and control interface.
In one aspect, an embodiment of the present invention provides a method for detecting a signal source of a transponder of an air traffic warning system, including the following steps:
Disconnecting a signal transmission channel between a receiving module and an intermediate frequency module of a responder signal source, so that the empty pipe responder tester outputs radio frequency signals to the intermediate frequency module as input signals of the responder signal source;
selecting an input detection mode, setting parameters of a signal source of the responder according to the input detection mode, and entering a pulse channel test mode of the signal source of the responder;
controlling a responder signal source to receive an input signal, controlling the responder signal source to operate according to an input detection mode, obtaining an input measured value through measurement of a peak power analyzer, calling a corresponding peak power analyzer inquiry instruction, obtaining the input measured value, and displaying the input measured value to a control interface;
connecting the empty pipe responder tester to the peak power analyzer, outputting the same radio frequency signal, obtaining an input nominal value through the measurement of the peak power analyzer, calling a corresponding peak power analyzer inquiry command, obtaining the input nominal value, taking the difference value between the input nominal value and an input measured value as an input detection result, and displaying the input detection result to the control interface.
Based on the further improvement of the method, the input detection mode comprises the following steps:
the input pulse characteristic detection is used for controlling a responder signal source to detect the received input signal according to the set pulse period;
The input power detection is used for controlling a transponder signal source to sequentially detect the received input signals according to the pulse types;
and the input frequency detection is used for controlling the transponder signal source to detect the received input signals according to the specified pulse type.
Based on the further improvement of the method, the working mode of the empty management responder tester comprises the following steps: an S mode and a C mode;
the obtaining of the input measured value is based on the input measured value obtained by measuring the input signal received by the transponder signal source by the peak power analyzer, and the obtaining of the input measured value is performed by calling a corresponding inquiry instruction to the peak power analyzer according to the input detection mode and the working mode, and specifically includes:
when the input detection mode is the input pulse characteristic detection, if the working mode is the S mode, the input actual value includes: the width, rise time and fall time values of the P1, P2 and P6 pulses, if the operation mode is the C mode, the input actual measurement values include: width, rise and fall values of the P1, P2, and P4 pulses;
when the input detection mode is input power detection, if the operation mode is S mode, the input measured value includes: the pulse power of P1, P2 and P6, if the operation mode is C mode, the input measured value includes: pulse power of P1, P2, and P4;
When the input detection mode is input frequency detection, if the working mode is an S mode, the input actual measurement value includes: the pulse frequency of the S mode, if the operating mode is the C mode, the inputting the measured value includes: the pulse frequency of the C-mode.
The acquired input nominal value is obtained by measuring a radio frequency signal directly output by the empty pipe responder tester based on the peak power analyzer, and the same inquiry command is called for the peak power analyzer under the same input detection mode and working mode as the acquired input measured value to acquire data with the same parameters as the input measured value.
Based on the further improvement of the method, the control interface comprises: inputting a menu of a detection mode, and inputting parameters and detection information configured by the detection mode; the detection information includes: inputting a measured value, inputting a nominal value and inputting a detection result.
Based on the further improvement of the method, the detection method further comprises the following steps:
providing a direct current signal for a working module port of a responder signal source to ensure that the responder signal source works normally;
selecting an output detection mode, setting an output nominal value according to the output detection mode, entering a transponder transmitting working mode of a transponder signal source, selecting a signal transmitting channel, and setting flight simulation data;
And controlling the signal source of the transponder to operate according to an output detection mode, obtaining an output measured value through the measurement of the spectrum analyzer, calling a corresponding query instruction of the spectrum analyzer to obtain the output measured value, and displaying a difference value between the output nominal value and the corresponding output measured value as an output detection result to a control interface.
Based on the further improvement of the method, the output detection mode comprises the following steps:
the output frequency detection is used for controlling the transponder signal source to output signals according to different configured frequency parameters under the same transmitting channel power;
and the output power detection is used for controlling the signal source of the responder to output signals according to different configured power parameters under the carrier frequencies of inquiry and response respectively.
Based on the further improvement of the method, the corresponding query instruction of the spectrum analyzer is called, and the corresponding query instruction is called to the spectrum analyzer to obtain the output measured value according to the output detection mode, and the method specifically comprises the following steps:
when the output detection mode is output frequency detection, the output measured value is the frequency value of the output signal;
when the output detection mode is output power detection, the output actual value is the power value of the output signal.
Based on the further improvement of the method, the flight simulation data comprises: the number of the airplanes is at least 1, and the antenna transmission mode is a full antenna;
The control interface further comprises a menu for outputting the detection mode and parameters configured by the detection mode, and the detection information further comprises: and outputting the measured value and the detection result.
In another aspect, an embodiment of the present invention provides a system for detecting a signal source of a transponder in an air traffic warning system, including: the device comprises an empty pipe transponder tester, a peak power analyzer, a spectrum analyzer, a transponder signal source, a detection module and a control interface, wherein,
the empty pipe responder tester is used for outputting a radio frequency signal to an intermediate frequency module of a responder signal source to serve as an input signal of the responder signal source and outputting the radio frequency signal to a peak power analyzer to serve as a standard signal;
the peak power analyzer is connected with the responder signal source and the empty pipe responder tester and is used for measuring an input signal received by the responder signal source and a standard signal output by the empty pipe responder tester;
the frequency spectrum analyzer is connected with the transponder signal source and used for measuring the signal transmitted by the transponder signal source;
the responder signal source is used for receiving the radio frequency signals of the S mode and the C mode according to the received detection instruction and transmitting inquiry and response signals;
the detection module is used for setting up a detection sequence of a transponder signal source, executing input detection and output detection and acquiring a detection result, wherein the transponder signal source is controlled by 3 input detection modes to complete input detection, a peak power analyzer inquiry instruction is called to obtain an input measured value and an input nominal value, and the difference value between the input nominal value and the input measured value is the input detection result; setting an output nominal value through 2 output detection modes, controlling a signal source of a transponder to emit a signal, calling an inquiry command of a spectrum analyzer to obtain an output measured value, and taking a difference value between the output nominal value and the corresponding output measured value as an output detection result;
The control interface is used for displaying menus for inputting and outputting the detection modes and configured parameters, and displaying corresponding detection information in real time, wherein the detection information comprises: input measured value, input nominal value, input detection result, output measured value and output detection result.
Based on the further improvement of the system, before the input detection is executed, the peak power analyzer is calibrated, and a power sensor on the peak power analyzer is connected to a signal source of the transponder; the physical connection between a receiving module and an intermediate frequency module of a transponder signal source is disconnected, so that an S-mode signal and a C-mode signal of an ATC (advanced telecom computing architecture) air traffic control transponder are input into a signal input port of the intermediate frequency module by an air traffic control transponder tester;
before output detection is executed, the empty pipe responder tester is closed, the spectrum analyzer is connected to a responder signal source, and a +5V direct current signal is provided for a working module port of the responder signal source, so that the responder signal source works normally.
Compared with the prior art, the invention can realize at least one of the following beneficial effects:
1. the detection method that small signals cross over a signal source receiving circuit module of the air traffic warning system responder is adopted, so that the technical bottleneck of independently detecting the signal source of the air traffic warning system responder is effectively solved;
2. The method comprises the steps that external and internal signals are loaded on a responder signal source, a detection sequence of the responder signal source is established, and parameter indexes of the responder signal source of the air traffic warning system are verified;
3. the method adopts an IEEE-488 communication standard technology, flexibly applies SCPI control instructions, realizes automatic operation control of related equipment, expands a human-computer interaction control interface, enables a transponder signal source to be more conveniently detected, effectively improves the equipment utilization rate of the system, reduces scientific research and production cost, and improves metering calibration and product detection timeliness.
In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings, in which like reference numerals refer to like parts throughout, are for the purpose of illustrating particular embodiments only and are not to be considered limiting of the invention.
Fig. 1 is a flow chart of a transponder signal source input detection method in embodiment 1 of the present invention;
fig. 2 is a signal format diagram of the S mode and the C mode in embodiment 1 of the present invention;
fig. 3 is a flowchart of a method for detecting an output of a signal source of a transponder in embodiment 2 of the present invention.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
In the case of the example 1, the following examples are given,
the embodiment of the invention discloses a method for detecting a signal source of a responder of an air traffic warning system, which comprises the following steps as shown in figure 1:
s11: disconnecting a signal transmission channel between a receiving module and an intermediate frequency module of a responder signal source, so that the empty pipe responder tester outputs radio frequency signals to the intermediate frequency module as input signals of the responder signal source;
it should be noted that the driving normal working pulse power of the air traffic warning system transponder signal source in the response receiving working circuit is above 1000W, in order to test the signal source of the responder under the conventional conditions in a laboratory, the embodiment adopts a driving method that a small signal crosses a receiving module circuit, crosses an attenuator in a signal receiving module of the signal source of the responder of the air traffic warning system, separates the attenuator from a signal transmission channel between an intermediate frequency module, loads an S mode signal and a C mode signal of an ATC air traffic responder to an input channel of the intermediate frequency module by using an air traffic responder tester respectively to drive the circuit to work normally, performs frequency mixing processing on a local oscillation signal and an ATC air traffic responder signal after the signals are processed by a filtering module, then the signal is processed by the filter and the detector again, then the signal is demodulated, and the demodulated signal is driven, output and displayed.
The minimum driving pulse power of the intermediate frequency module is-5.0 dBm, and the conventional test instrument can meet the parameter requirement, so that the normal work of the transponder signal source is driven while the transponder signal source is independently tested, the effective verification of the performance index parameters of the transponder signal source of the air traffic warning system is ensured, and the scientific measurement method and the accurate measurement data are ensured.
Specifically, after a signal transmission channel between a receiving module and an intermediate frequency module of a responder signal source is disconnected, an antenna ANT port of an empty pipe responder tester is connected with a TOPRXIN input port of the responder signal source of the air traffic warning system. When the empty pipe answering machine tester outputs radio frequency signals, the working mode comprises: s mode and C mode. The S-mode signal is composed of P1, P2 and P6 pulses, the C-mode signal is composed of P1, P2 and P4 pulses, and the signal format is shown in FIG. 2.
Preferably, considering that the technical characteristics of the transponder signal source can be detected from various dimensions for different operation modes, when the empty pipe transponder tester outputs the radio frequency signal, in addition to the operation mode, other parameters can be set, including: antenna mode of transmission, reply address, radio frequency level, and pulse repetition frequency.
Illustratively, the working mode of the empty pipe transponder tester is set to be S mode, the emission is ANTENNA ANTENNA mode, the response address is 000000, the radio frequency level is-2.0 dBm, and the pulse repetition frequency PRF is 50 mus.
S12: setting parameters of a signal source of the responder according to the selected input detection mode, and entering a pulse channel test mode of the signal source of the responder;
it should be noted that, according to the operating principle, technical characteristics and bus communication technology of the transponder signal source, the peak power analyzer and the spectrum analyzer, IEEE-488 communication Standard technology is adopted, SCPI (Standard Commands for Programmable Instruments) control Commands are used to establish communication with the transponder signal source and the peak power analyzer, and further related Commands are combined and sequenced to form a detection sequence, so as to realize automatic detection control and data acquisition for the transponder signal source and the peak power analyzer.
Specifically, firstly, the power of the peak power analyzer is calibrated, and after the calibration is completed, the power sensor on the peak power analyzer is connected to the XNITPAM port of the air traffic warning system transponder signal source.
After the communication between the computer detection control system, the responder signal source and the peak power analyzer is established through the I/OLibreries drive, the responder signal source parameter is firstly restored to the initial setting, and then the responder signal source parameter is set according to the selected input detection mode.
It should be noted that there are 3 input detection modes, each detection mode can be respectively detected in the S mode and the C mode, so that the technical features to be detected in each operation mode in each input detection mode are set by setting different parameters, so that the detection result is more accurate, including:
the input pulse characteristic detection is used for controlling a transponder signal source to detect the received input signal according to a set pulse period;
illustratively, the scanning mode is set to continuous, the transmit antenna port is set to 1T in S mode, and the transmit antenna port is set to 1B in C mode.
The input power detection is used for controlling a transponder signal source to sequentially detect the received input signals according to the pulse types;
exemplarily, in the S mode, the transmit antenna port is set to 2T, the P6 pulse envelope data is null, and the pulse detection order of P1, P2 and P6 is adopted, and in the C mode, the transmit antenna port is set to 2B, and the pulse detection order of P1, P2 and P4 is adopted;
and the input frequency detection is used for controlling the transponder signal source to detect the received input signal according to the specified pulse type.
Illustratively, in the S mode, the transmit antenna port is set to 1T, designating the pulse type as P6, and in the C mode, the transmit antenna port is set to 1B, designating the pulse type as P4.
And entering a signal source pulse channel test mode through an SCPI command, and starting to perform characteristic detection on the pulse signal.
S13: controlling a responder signal source to receive an input signal, controlling the responder signal source to operate according to an input detection mode, obtaining an input measured value through measurement of a peak power analyzer, calling a corresponding peak power analyzer inquiry instruction, obtaining the input measured value, and displaying the input measured value to a control interface;
it should be noted that, the response address corresponding to each operating mode of each input detection mode is different, after the transponder signal source receives a signal, the transponder signal source selects and confirms the input signal according to the operating mode and the response address that are the same as the type of the empty pipe transponder tester, the transponder signal source is controlled according to the selected input detection mode to detect a pulse timing signal, the input pulse characteristic, the input characteristic or the input frequency of the transponder signal source is measured by the peak power analyzer to obtain an input actual measurement value, a corresponding query command of the peak power analyzer is called to obtain the input actual measurement value, specifically:
when the input detection mode is the input pulse characteristic detection, if the working mode is the S mode, the input actual value includes: the width, rise time and fall time of the P1, P2 and P6 pulses, if the operation mode is C mode, the input measured values include: width, rise and fall values of the P1, P2, and P4 pulses;
When the input detection mode is the input power detection, if the operation mode is the S mode, the inputting the actual measurement value includes: the pulse power of P1, P2 and P6, if the operation mode is C mode, the input measured values include: pulse power of P1, P2, and P4;
when the input detection mode is the input frequency detection, if the working mode is the S mode, the inputting the actual measurement value includes: the pulse frequency of the S mode, if the operation mode is the C mode, inputting the measured value includes: pulse frequency of C-mode.
Illustratively, using a model 4500B peak power analyzer, manufactured by Boston corporation, USA, the peak power analyzer passes through "FETC: ARR: AMEA: PULS: WID? "the measured pulse width value is obtained by the command, and is measured by" FETC: ARR: AMEA: TIM? "the measured value of the pulse rise/fall time is obtained by" READ1: MARK: RAT? "the measured value of pulse power is obtained by the command, and is measured by FETC (field of view: ARR: AMEA: FREQ? "command acquisition pulse frequency measured value.
S14: connecting the empty pipe responder tester to the peak power analyzer, outputting the same radio frequency signal, obtaining an input nominal value through the measurement of the peak power analyzer, calling a corresponding peak power analyzer inquiry command, obtaining the input nominal value, taking the difference value between the input nominal value and an input measured value as an input detection result, and displaying the input detection result to the control interface.
Specifically, a VIDEO signal output port of the empty pipe responder tester is connected to an input port of a power sensor of a peak power analyzer, the peak power analyzer measures a radio frequency signal directly output by the empty pipe responder tester to obtain an input nominal value, the obtained input nominal value is based on the obtained input nominal value, the same inquiry command is called for the peak power analyzer in an input detection mode and a working mode which are the same as those of the obtained input measured value, and data with the same parameter as the input measured value is obtained.
During detection, the input detection mode which is the same as that in the step S13 and an input actual measurement value record in the detection information are selected in the control interface, so that the air traffic control transponder tester outputs the same radio frequency signal, an input nominal value is obtained through measurement of the peak power analyzer, and a corresponding query instruction of the peak power analyzer is called to obtain the input nominal value.
Specifically, when the input detection mode is input pulse characteristic detection, if the operating mode is S mode, inputting the nominal value includes: the width, rise time and fall time values of the P1, P2 and P6 pulses, if the operating mode is C mode, the input nominal values include: width, rise time, and fall time values of the P1, P2, and P4 pulses;
When the input detection mode is input power detection, if the operation mode is an S mode, inputting the nominal value includes: the pulse power of P1, P2 and P6, if the operation mode is C mode, the input nominal values include: pulse power of P1, P2, and P4;
when the input detection mode is input frequency detection, if the working mode is an S mode, inputting the nominal value includes: the pulse frequency of the S mode, if the operating mode is the C mode, inputting the nominal value includes: the pulse frequency of the C-mode.
And the obtained input nominal value corresponds to the selected input measured value one by one, and the difference value between the input nominal value and the input measured value is calculated to obtain an input detection result which is displayed in a control interface.
It should be noted that, when the input detection mode is input frequency detection, since the carrier frequency of the S-mode interrogation and control transmission is 1030MHz, and the carrier frequency of the C-mode response transmission is 1090MHz, the input nominal value corresponding to each operating mode is known, and at this time, it is not necessary to measure the input nominal value by using a peak power analyzer.
The control interface includes: inputting a menu of a detection mode, and inputting parameters and detection information configured by the detection mode; the detection information includes: inputting a measured value, inputting a nominal value and inputting a detection result.
Preferably, the detection result is displayed in a well-defined color according to a preset error threshold value, and whether the technical index is qualified or not is visually displayed.
Illustratively, the input power range of a signal source of a transponder of a certain type of air traffic warning system is-20 dBm to-85 dBm, and the performance technical requirement is +/-1 dBm, so in the input power detection mode, the calculated input detection result is qualified within the performance technical requirement range, and is unqualified on the contrary.
In the case of the example 2, the following examples are given,
in another embodiment of the present invention, a method for detecting an output signal of a transponder signal source of an air traffic warning system is provided, as shown in fig. 3, comprising the steps of:
s21: providing a direct-current power supply signal for a working module port of a responder signal source to ensure that the responder signal source works normally;
specifically, an 'EXTERNAL MODULATOR VIDEO' working module port A of a signal source of the air traffic warning system responder provides a +5V direct-current power supply signal to enable the air traffic warning system responder to normally work.
S22: selecting an output detection mode, setting an output nominal value according to the output detection mode, entering a transponder transmitting working mode of a transponder signal source, selecting a signal transmitting channel, and setting corresponding flight simulation data;
It should be noted that, after communication between the computer detection control system and the transponder signal source and the spectrum analyzer is established through the I/O library driver, the parameters of the transponder signal source are first restored to the initial settings, and then the parameters of the transponder signal source are set according to the selected output detection mode, where the frequency and power values are used as nominal values.
Specifically, the output detection method includes:
the output frequency detection is used for controlling the transponder signal source to change the output signal of the carrier frequency parameter under the same transmitting channel power;
illustratively, a signal transmission channel is selected to set a channel a, the set power is-20 dBm, and carrier frequency parameters are, in order: 1025, 1050, 1075, 1090, 1100, 1125 and 1155, these frequency parameters are the output nominal values.
And the output power detection is used for controlling the transponder signal source to change the output signal of the power parameter under the carrier frequency of the inquiry and the response respectively.
Illustratively, when the inquiry transmitting carrier frequency is set to be 1030MHz and the response transmitting carrier frequency is set to be 1090MHz, the power parameters of the transmitting channel a are: and the power parameters are output nominal values when the power parameters are-20 dBm, -30dBm, -40dBm, -50dBm, -60dBm, -70dBm, -80dBm and-85 dBm output signals and the minimum step is 1 dBm.
Illustratively, using a spectrum analyzer model number E4411B manufactured by Agilent, USA, a spectrum analyzer passes ": CALC: MARK1: MAX", ": CALC: MARK: X? "the instruction obtains the measured value of frequency, which is determined by CALC: MARK2: MAX? "command acquisition power measurement.
It should be noted that the air traffic warning system transponder signal source is connected to the detected device through 8 radio frequency interfaces, and the upper, lower, left, and right antennas of the aircraft respectively, and according to the set simulation TCAS signal, the amplitude and phase of each radio frequency port are controlled, and signal modulation is performed, so as to simulate a scenario of multiple aircraft intrusion, including orientation, height, speed, address coding, etc. of the simulation aircraft, for testing the working performance of the detected airborne collision avoidance system computer.
When the detection is carried out, the number of the simulated airplanes is at least 1, and the antenna transmission mode is full-antenna (8-port) transmission.
S23: and controlling the transponder signal source to operate according to an output detection mode, obtaining an output measured value through the measurement of the spectrum analyzer, calling a corresponding query instruction of the spectrum analyzer to obtain the output measured value, and displaying a difference value between the output nominal value and the corresponding output measured value as an output detection result to a control interface.
Specifically, invoking the corresponding query command of the spectrum analyzer is to invoke the corresponding query command to the spectrum analyzer to obtain an output measured value according to the output detection mode and the configured parameters therein, and specifically:
when the output detection mode is output frequency detection, the output measured value is the frequency value of the output signal;
when the output detection mode is output power detection, the output actual measurement value is a power value of the output signal.
And calculating the difference value between the output nominal value and the output measured value to obtain an output detection result, and displaying the output detection result to a control interface. The control interface further comprises a menu for outputting the detection mode and parameters configured by the detection mode, and the detection information further comprises: and outputting the measured value and the detection result.
Preferably, in order to verify the state of the transponder signal source of the air traffic warning system, the method may further detect an attenuator performance indicator of a working circuit of a receiving module of the transponder signal source, and includes: under the same parameter setting, output signal data of two air traffic warning system responder signal sources of the same model are measured and compared, and the state of the air traffic warning system responder signal sources is judged by analyzing the comparison result.
Compared with the prior art, the embodiment 1 and the embodiment 2 respectively provide a method for detecting the signal source of the air traffic warning system responder, and the technical bottleneck of independently detecting the signal source of the air traffic warning system responder is effectively solved by adopting a method for detecting that a small signal crosses a signal source receiving circuit module of the air traffic warning system responder; the method comprises the steps that external and internal signals are loaded on a responder signal source, a detection sequence of the responder signal source is established, and parameter indexes of the responder signal source of the air traffic warning system are verified; through the control instruction, the automatic operation control of the power analyzer and the spectrum analyzer is realized, and the acquisition accuracy and the acquisition efficiency of the detected measured value are improved.
In the case of the embodiment 3, the following examples,
a system for detecting a signal source of a transponder in an air traffic warning system is provided, so as to implement the detection methods in embodiments 1 and 2, and the specific implementation manner refers to the corresponding descriptions in embodiments 1 and 2, and the system includes: an empty pipe responder tester, a peak power analyzer, a spectrum analyzer, a responder signal source, a detection module and a control interface, wherein,
the empty pipe responder tester is used for outputting a radio frequency signal to an intermediate frequency module of a responder signal source as an input signal of the responder signal source and outputting the radio frequency signal to a peak power analyzer as a standard signal;
The peak power analyzer is used for being connected with the transponder signal source and the empty pipe transponder tester and measuring an input signal received by the transponder signal source and a standard signal output by the empty pipe transponder tester;
the frequency spectrum analyzer is connected with the transponder signal source and used for measuring the signal transmitted by the transponder signal source;
the responder signal source is used for receiving the radio frequency signals of the S mode and the C mode according to the received detection instruction and transmitting inquiry and response signals;
the detection module is used for setting up a detection sequence of a signal source of the responder, executing input detection and output detection and acquiring a detection result, wherein the signal source of the responder is controlled by 3 input detection modes to complete input detection, an inquiry instruction of the peak power analyzer is called to obtain an input measured value and an input nominal value, and the difference value of the input nominal value and the input measured value is the input detection result; setting an output nominal value through 2 output detection modes, controlling a signal source of a transponder to emit a signal, calling an inquiry instruction of a spectrum analyzer to obtain an output measured value, and taking a difference value between the output nominal value and the corresponding output measured value as an output detection result;
the control interface is used for displaying menus for inputting and outputting the detection modes and configured parameters, and displaying corresponding detection information in real time, wherein the detection information comprises: input measured value, input nominal value, input detection result, output measured value and output detection result.
Before input detection is performed, calibrating a peak power analyzer, and connecting a power sensor on the peak power analyzer to a signal source of the transponder; and disconnecting the physical connection between the receiving module of the responder signal source and the intermediate frequency module, so that the S-mode signal and the C-mode signal of the ATC air traffic control responder are input into the signal input port of the intermediate frequency module by the air traffic control responder tester.
It should be noted that the peak power analyzer does not need to be repeatedly calibrated when the detection is performed in the same environment and in the same time period. Especially when the temperature of the environment changes or the peak power analyzer is turned off and restarted, the peak power analyzer should be recalibrated before detection.
Before output detection is executed, the empty pipe responder tester is closed, the spectrum analyzer is connected to a responder signal source, and a +5V direct-current power supply signal is provided for a working module port of the responder signal source, so that the responder signal source works normally.
Compared with the prior art, the detection system for the signal source of the responder of the air traffic warning system adopts an IEEE-488 communication standard technology, flexibly applies SCPI control instructions, realizes automatic operation control of related equipment, expands a man-machine interaction control interface, enables the signal source of the responder to be detected more conveniently, effectively improves the equipment utilization rate of the system, reduces scientific research and production cost, and improves metering calibration and product detection timeliness.
Those skilled in the art will understand that all or part of the processes of the methods of the embodiments described above can be implemented by controlling corresponding hardware through a software program, and the program can be stored in a computer-readable storage medium. The computer readable storage medium is a magnetic disk, an optical disk, a read-only memory or a random access memory, etc.
While the invention has been described with reference to specific preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (10)
1. A method for detecting a signal source of a transponder of an air traffic warning system is characterized by comprising the following steps:
disconnecting a signal transmission channel between a receiving module and an intermediate frequency module of a responder signal source, so that the empty pipe responder tester outputs a radio frequency signal to the intermediate frequency module as an input signal of the responder signal source;
selecting an input detection mode, setting parameters of a signal source of a responder according to the input detection mode, and entering a pulse channel test mode of the signal source of the responder;
Controlling a transponder signal source to receive the input signal, controlling the transponder signal source to operate according to an input detection mode, obtaining an input measured value through measurement of a peak power analyzer, calling a corresponding query instruction of the peak power analyzer, obtaining the input measured value, and displaying the input measured value on a control interface;
connecting the empty pipe responder tester to a peak power analyzer, outputting the same radio frequency signal, obtaining an input nominal value through the measurement of the peak power analyzer, calling a corresponding peak power analyzer inquiry command, obtaining the input nominal value, taking the difference value between the input nominal value and an input measured value as an input detection result, and displaying the input detection result to a control interface.
2. The method of claim 1, wherein said input detecting means comprises:
the input pulse characteristic detection is used for controlling a transponder signal source to detect the received input signal according to a set pulse period;
the input power detection is used for controlling a transponder signal source to sequentially detect the received input signals according to the pulse types;
and the input frequency detection is used for controlling the transponder signal source to detect the received input signal according to the specified pulse type.
3. The method of claim 2, wherein the operating mode of the air traffic alert system transponder signal source comprises: an S mode and a C mode;
the obtaining of the input actual measurement value is based on an input actual measurement value obtained by a peak power analyzer measuring an input signal received by a signal source of the transponder, and the obtaining of the input actual measurement value is performed by calling a corresponding inquiry instruction to the peak power analyzer according to an input detection mode and a working mode, and specifically includes:
when the input detection mode is the input pulse characteristic detection, if the working mode is the S mode, the input actual value includes: the width, rise time and fall time values of the P1, P2 and P6 pulses, if the operation mode is the C mode, the input actual measurement values include: width, rise time, and fall time values of the P1, P2, and P4 pulses;
when the input detection mode is the input power detection, if the operation mode is the S mode, the inputting the actual measurement value includes: the pulse power of P1, P2 and P6, if the operation mode is C mode, the input measured values include: pulse power of P1, P2, and P4;
when the input detection mode is the input frequency detection, if the working mode is the S mode, the inputting the actual measurement value includes: the pulse frequency of the S mode, if the operating mode is the C mode, the inputting the measured value includes: the frequency of the pulses of the C-mode,
The obtained input nominal value is obtained by measuring a radio frequency signal directly output by the empty pipe responder tester based on the peak power analyzer, and the same inquiry command is called for the peak power analyzer under the same input detection mode and working mode as the obtained input measured value to obtain data with the same parameters as the input measured value.
4. The method of claim 3, wherein the control interface comprises: inputting a menu of a detection mode, and inputting parameters and detection information configured by the detection mode; the detection information includes: inputting a measured value, inputting a nominal value and inputting a detection result.
5. The method for detecting a source of a transponder signal according to one of claims 1-4, wherein the method further comprises:
providing a direct current signal for a working module port of a responder signal source to ensure that the responder signal source works normally;
selecting an output detection mode, setting an output nominal value according to the output detection mode, entering a transponder transmitting working mode of a transponder signal source, selecting a signal transmitting channel, and setting flight simulation data;
And controlling the transponder signal source to operate according to an output detection mode, obtaining an output measured value through the measurement of the spectrum analyzer, calling a corresponding query instruction of the spectrum analyzer, obtaining the output measured value, and displaying a difference value between the output nominal value and the corresponding output measured value as an output detection result to a control interface.
6. The method of claim 5, wherein said outputting a detection pattern comprises:
the output frequency detection is used for controlling the transponder signal source to output signals according to configured different frequency parameters under the same transmitting channel power;
and the output power detection is used for controlling the signal source of the responder to output signals according to different configured power parameters under the carrier frequencies of inquiry and response respectively.
7. The method for detecting a transponder signal source of an air traffic alert system according to claim 6, wherein the invoking of the corresponding query command of the spectrum analyzer is invoking of the corresponding query command of the spectrum analyzer to obtain the output measured value according to the output detection mode, and specifically comprises:
when the output detection mode is output frequency detection, the output measured value is the frequency value of the output signal;
When the output detection mode is output power detection, the output actual measurement value is a power value of the output signal.
8. The method of claim 7, wherein said flight simulation data includes: the number of airplanes is at least 1, and the antenna transmission mode is a full antenna;
the control interface further comprises a menu for outputting the detection mode and parameters for outputting the detection mode configuration, and the detection information further comprises: and outputting the measured value and the detection result.
9. A system for detecting a source of a transponder signal of an air traffic alert system, comprising: an empty pipe responder tester, a peak power analyzer, a spectrum analyzer, a responder signal source, a detection module and a control interface, wherein,
the empty pipe responder tester is used for outputting a radio frequency signal to an intermediate frequency module of a responder signal source as an input signal of the responder signal source and outputting the radio frequency signal to a peak power analyzer as a standard signal;
the peak power analyzer is connected with the transponder signal source and the empty pipe transponder tester and is used for measuring an input signal received by the transponder signal source and a standard signal output by the empty pipe transponder tester;
The frequency spectrum analyzer is connected with the transponder signal source and used for measuring the signal transmitted by the transponder signal source;
the responder signal source is used for receiving the radio frequency signals of the S mode and the C mode according to the received detection instruction and transmitting inquiry and response signals;
the detection module is used for setting up a detection sequence of a signal source of the transponder, executing input detection and output detection and acquiring a detection result, wherein the signal source of the transponder is controlled by 3 input detection modes to complete input detection, an inquiry command of a peak power analyzer is called to obtain an input measured value and an input nominal value, and the difference value between the input nominal value and the input measured value is the input detection result; setting an output nominal value through 2 output detection modes, controlling a signal source of a transponder to emit a signal, calling an inquiry instruction of a spectrum analyzer to obtain an output measured value, wherein the difference value between the output nominal value and the corresponding output measured value is an output detection result;
the control interface is used for displaying menus for inputting and outputting the detection modes and configured parameters and displaying corresponding detection information in real time, wherein the detection information comprises: input measured value, input nominal value, input detection result, output measured value and output detection result.
10. The air traffic alert system transponder signal source detection system of claim 9, wherein prior to performing the input detection, the peak power analyzer is calibrated, and a power sensor on the peak power analyzer is connected to the transponder signal source; the physical connection between a receiving module and an intermediate frequency module of a responder signal source is disconnected, so that an S-mode signal and a C-mode signal of an ATC (automatic train control) empty pipe responder are input to a signal input port of the intermediate frequency module by an empty pipe responder tester;
before output detection is executed, the empty pipe responder tester is closed, the spectrum analyzer is connected to the responder signal source, and a +5V direct-current signal is provided for a working module port of the responder signal source, so that the responder signal source works normally.
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| US20050256651A1 (en) * | 2004-01-15 | 2005-11-17 | Taylor Matthew A | Algorithm for estimation of multiple faults on a transmission line or waveguide |
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| CN107612610B (en) * | 2017-08-31 | 2019-10-22 | 航天东方红卫星有限公司 | A kind of spaceborne TT&C Transponder self-testing system and method based on slave computer |
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