A portable aircraft communications and navigation system detection apparatus and method

Abstract

Provided are a portable aircraft communication navigation system detection device and a detection method for the same. The portable aircraft communication navigation system detection device comprises a body, a radio frequency signal analysis assembly, a radio frequency signal generation assembly, a control assembly, and the like. The radio frequency signal analysis assembly comprises a standing wave analysis module, a power / frequency analysis module, a 30 dB attenuator, two radio frequency input ports, and one radio frequency output port. The radio frequency signal generation assembly comprises a radio frequency module, a program-controlled attenuator, a communication signal output port, and a navigation signal output port. The control assembly comprises a main control unit, a touch display, and the like. The present application is dedicated to solving the technical problems that hidden faults of an external field communication system cannot be found, a navigation system requires many first-line maintenance support devices, and a compass signal cannot be received in a hangar or hangar, thereby leading to the fact that the compass cannot be checked. The present application can quickly complete the first-line in-situ performance detection of short-wave radio stations, ultra-short-wave radio stations, filters, power adders, antennas, and the like, and is suitable for the inspection of communication navigation devices of various types of aircraft.

Description

TECHNICAL FIELD

[0001] The present application relates to a detection device and method, in particular to a portable aircraft communication navigation detection device and method, which is mainly suitable for the first-line maintenance and detection of civil aviation aircraft, navigation aircraft and military aircraft communication, navigation equipment. BACKGROUND

[0002] The airborne communication navigation equipment is the central nervous system and lifeline of the aircraft. Therefore, the daily inspection of the airborne communication navigation equipment is essential in the first-line maintenance support in the field. However, there are the following technical problems in the first-line maintenance support of the airborne communication navigation equipment.

[0003] Firstly, in the first-line maintenance support process, the maintenance self-detection, voice calibration, and single tone self-listening are usually used for the inspection of the airborne communication equipment. These simple inspection methods cannot check the internal performance of each component of the communication system, and the hidden faults cannot be found, which affects the aircraft preparation quality and leads to the flight of the aircraft with hidden faults. If these hidden faults are changed into overt faults in the air, the flight safety will be affected.

[0004] Secondly, the method of simulator function test is usually used for the inspection of the navigation equipment, and different navigation equipment is equipped with different simulators and inspection instruments. For example, the TACAN, microwave landing, instrument landing, directional instrument, and beacon machine are equipped with corresponding simulators respectively. This makes the daily inspection of the maintenance personnel particularly tedious, long working time, and low efficiency. When the aircraft is transferred, it is very inconvenient to carry so many support equipment, and some of the simulators are also large and heavy, which leads to the long tail of the support equipment and the inability to move.

[0005] Thirdly, there is no field inspection instrument for the radio compass at present, which makes the maintenance personnel rely on the radio signal of the ground station or local broadcasting station for function inspection when inspecting the compass. Since the hangar and hangar shield the radio compass signal, the aircraft cannot receive the compass signal. The self-detection of the radio compass cannot check its function comprehensively. This leads to the fact that the aircraft has to be pushed out of the hangar and hangar for inspection every time the radio compass is inspected, which is time-consuming and laborious, and the working efficiency is low. SUMMARY

[0006] In view of the problems existing in the prior art, the present application provides a portable aircraft communication navigation system detection device, hereinafter referred to as "detection device", which comprises a host computer 1, a feeder 2, a radio frequency conversion joint 3, an antenna 4, and a power adapter 5; wherein

[0007] The host 1 comprises a hollow body 11, the body 11 is internally provided with a radio frequency signal analysis assembly, a radio frequency signal generation assembly, a control assembly, a battery, a USB interface 18 and an SD card interface 19, the surface of the host 1 is provided with a touch display 12, a battery cavity, a power button 14, a radiator 15, a charging port 16 and a radio frequency interface 17; the battery is placed in the battery cavity; the radio frequency output port, the radio frequency input 1 port, the radio frequency input 2 port and the communication signal output port in the radio frequency interface 17 are connected with the radio frequency conversion joint 3 through the feeder 2, and the navigation signal output port in the radio frequency interface 17 is connected with the antenna 4;

[0008] The power adapter 5 is used for connecting a power supply to charge the host 1.

[0009] In an embodiment of the present application, the radio frequency signal analysis assembly in the body 11 is used for collecting and analyzing the aircraft communication signals fed in through the radio frequency input 1 port and the radio frequency input 2 port through the feeder 2, and calculating the carrier power, the carrier frequency, the antenna standing wave ratio and the insertion loss of the filter of the short wave radio station and the ultrashort wave radio station; the radio frequency signal analysis assembly comprises a standing wave analysis module, a power / frequency analysis module, a 30dB attenuator and two radio frequency input ports and one radio frequency output port;

[0010] The standing wave analysis module measures the analog voltage values of the forward power and the reverse power of the communication system by collecting the aircraft communication signals input by the radio frequency input 1 port and output to the antenna by the radio frequency output port, and sends the analog voltage values to the power / frequency analysis module;

[0011] The power / frequency analysis module collects the aircraft communication signals input by the radio frequency input 2 port and attenuated by the 30dB attenuator, attenuates and distributes the signals through an internal resistance network, one way to output the average power analog voltage value, the other way to output the carrier frequency digital quantity, the analog voltage value and the frequency digital quantity output by the two ways are sampled and quantized by the single-chip microcomputer inside the power / frequency analysis module, and the carrier power and the carrier frequency of the signal are calculated; at the same time, the single-chip microcomputer inside the power / frequency analysis module also samples and quantizes the forward power and the reverse power analog voltage values sent out by the standing wave analysis module, and calculates the forward power, the reverse power and the standing wave ratio; the carrier power, the carrier frequency, the forward power, the reverse power and the standing wave ratio are collectively used as detection data and output to the main control unit of the control assembly.

[0012] In another embodiment of the present application, the radio frequency signal generation assembly is used for generating analog communication signals and analog navigation signals with adjustable power size, for the sensitivity quantitative test of the communication system receiver and the function check of the navigation system receiver; the radio frequency signal generation assembly comprises a radio frequency module, a program-controlled attenuator, a communication signal output port and a navigation signal output port;

[0013] The radio frequency module generates analog communication signals and analog navigation signals; wherein the analog communication signals are: 2-30MHz HF and 108-400MHz V / UHF communication carrier signals; 1000Hz audio signals, which are modulated onto the HF carrier signals in the above sideband USB / under sideband LSB modulation mode with a 30% modulation depth, modulated onto the V / UHF carrier signals in the amplitude modulation AM modulation mode with a 30% modulation depth, and modulated onto the V / UHF carrier signals in the frequency modulation FM modulation mode with a 6000Hz modulation frequency offset; the analog navigation signals are: 0.15-1.75MHz compass carrier signals, 123MHz-247MHz directional instrument carrier signals, 75MHz beacon carrier signals, 108.10-111.95MHz heading carrier signals, and 329.15-335.00MHz glide carrier signals; 1000Hz controllable audio signals are used to simulate the reception signals of the compass and the listening signals of the directional instrument; three groups of controllable audio signals with frequencies of 400Hz, 1300Hz and 3000Hz are used to simulate the far station, middle station and near station signals of the beacon respectively; 1020Hz controllable audio signals are used to simulate the identification signals of the instrument landing station; two groups of audio signals with frequencies of 90Hz and 150Hz can simulate different heading and glide deviation information by changing the composition of the two signals, and can simulate the alarm condition by deleting one or both of the signals; the analog navigation signals can be adjusted in energy in the radio frequency module to qualitatively check the receiver sensitivity of each navigation device; the programmable attenuator can continuously adjust the power of the analog communication signals in the range of -50dBm to -120dBm with a step of 1dB and output, to meet the test requirements of the short wave radio station and the super short wave radio station receiver sensitivity; the communication signal output port is used to output the analog communication signals; and the navigation signal output port is used to output the analog navigation signals generated by the radio frequency module.

[0014] In another embodiment of the application, the control assembly is used to complete human-computer interaction and system control of the whole machine; the control assembly comprises a main control unit, a touch display, a USB interface and an SD card interface.

[0015] The main control unit controls the touch display to realize human-computer interaction, controls the radio frequency module in the radio frequency signal generation assembly to generate corresponding analog communication signals and analog navigation signals, controls the programmable attenuator in the radio frequency signal generation assembly to continuously adjust the power of the analog communication signals, receives and error compensates and displays the detection data sent by the radio frequency signal analysis assembly, collects and displays the power information sent by the power management assembly, sends the power-on and power-off instructions of each component to the power management assembly, and diagnoses, queries and records the detection results.

[0016] The touch display accomplishes the function of man-machine interaction, including display of detection result, parameter change of analog communication signal and analog navigation signal, change of system time, brightness adjustment of the touch display, switching of detection interface and various input instructions and output display;

[0017] The USB interface is used for software upgrade of the master control unit and data export of the detection result;

[0018] The SD card interface is used for software upgrade of the touch display.

[0019] The application further provides a detection method of the aircraft communication and navigation system, and the specific steps are as follows:

[0020] Step one: according to detection needs, selecting detection objects and configuring detection scenes; all objects of the communication and navigation system can be selected for detection, or one or several objects can be detected; according to different detection objects, connecting the feeder 2 or the antenna 4 of the detection equipment and configuring corresponding detection parameters;

[0021] Step two: applying the detection equipment to complete in-situ performance detection of the airborne communication system, including in-situ detection of the standing wave ratio of the communication system; in-situ detection of the transmission channel performance of the communication system; in-situ detection of the receiving channel performance of the communication system;

[0022] Step three: applying the detection equipment to complete in-situ function detection of the airborne navigation system, including function detection of the compass receiver; function detection of the beacon receiver; function detection of the directional instrument; function detection of the heading and glide receiver;

[0023] Step four: the master control unit of the control display component in the detection equipment can store 16 detection results for user query, including date, radio model, number, filter number and various performance parameters and diagnosis results of each detection;

[0024] Step five: connecting the detection equipment and the computer through the USB data line, and the detection result data stored in the detection equipment can be imported into the data recording software in the computer.

[0025] In an embodiment of the application, for in-situ detection of the standing wave ratio of the communication system antenna, step two is specifically as follows:

[0026] First, the standing wave ratio detection scene configuration is carried out; the radio frequency signal input and output port of the short wave or ultra-short wave radio station of the communication system is connected with the radio frequency input 1 port of the detection equipment, if there is a filter in the communication system, the port of the filter connected with the antenna is connected with the radio frequency input 1 port of the detection equipment, the radio frequency output port of the detection equipment is connected with the antenna of the communication system; the detection equipment and the communication system are powered on, the talk button is pressed, and the communication system transmits signals; the signals are fed into the detection equipment through the radio frequency input 1 port and fed out to the antenna of the communication system through the radio frequency output port, and the signals are radiated out by the antenna;

[0027] Secondly, the standing wave analysis module of the radio frequency signal analysis assembly in the detection equipment collects and analyzes the transmitted signals, measures the analog voltage values of the forward power, the reverse power and the standing wave ratio of the communication system, and sends the voltage values to the power / frequency analysis module of the radio frequency signal analysis assembly;

[0028] Thirdly, the single-chip microcomputer in the power / frequency analysis module samples and quantizes the analog voltage values, obtains the detection data of the forward power and the reverse power, calculates the standing wave ratio according to the two detection data by using formula (1), and sends the detection data of the forward power, the reverse power and the standing wave ratio to the main control unit in the control assembly;

[0029]

[0030] Wherein, SWR is the standing wave ratio, P P is the forward power, P R is the reverse power;

[0031] Finally, the main control unit carries out error compensation on the detection data of the forward power, the reverse power and the standing wave ratio, simultaneously carries out fault diagnosis on the detection results of the forward power, the reverse power and the standing wave ratio according to different fault diagnosis thresholds of different models of radio stations, and sends the detection data and the diagnosis results to the touch display for display; if the diagnosis result is qualified, “PASS” is displayed after the corresponding detection data; if the diagnosis result is unqualified, “ERR” is displayed after the corresponding detection data.

[0032] In another embodiment of the application, for in-situ detection of the transmission channel performance of the communication system, step two is specifically:

[0033] First, the communication system transmission channel detection scene configuration is carried out; the radio frequency signal input and output port of the short wave or ultra-short wave radio station of the communication system is connected with the radio frequency input 2 port of the detection equipment, the detection equipment and the communication system are powered on, and the talk button is pressed, and the communication system transmits signals;

[0034] Secondly, the transmitting signal is attenuated by a 30dB attenuator first, and then the signal energy is attenuated and distributed by the internal resistance network of the power / frequency analysis module, one way is to output the carrier power analog voltage value, and the other way is to output the carrier frequency digital value;

[0035] Thirdly, the analog voltage value and the frequency digital value output by the two ways are sampled and quantified by the single-chip microcomputer inside the power / frequency analysis module, the detection data of the carrier power and the carrier frequency of the signal are calculated, and the two detection data are sent to the main control unit in the control assembly;

[0036] Finally, the main control unit compensates the error of the carrier power and the carrier frequency detection data, simultaneously adopts different fault diagnosis thresholds according to different models of the radio station, and carries out fault diagnosis on the detection results of the carrier power, the carrier frequency and the filter transmission channel insertion loss, and sends the detection data and the diagnosis results to the touch display for display; if the diagnosis result is qualified, "PASS" is displayed after the corresponding detection data; if the diagnosis result is unqualified, "ERR" is displayed after the corresponding detection data;

[0037] In addition, if there is a filter in the communication system, the port of the filter connected with the antenna is connected with the radio frequency input 2 port of the detection equipment, the carrier power at the filter end is detected according to the above-mentioned method of detecting the carrier power of the radio station; the main control unit of the control assembly in the detection equipment calculates the insertion loss of the filter transmission channel according to the carrier power at the output end of the radio station and the carrier power at the output end of the filter by using formula (2), carries out fault diagnosis according to the filter transmission channel detection standard, and finally sends the detection data of the transmission insertion loss to the touch display for display, and displays "PASS" for qualified and "ERR" for unqualified after the detection data;

[0038] IL TX = 10log 10 (p1 / p2) (2)

[0039] Wherein, IL TX is the insertion loss of the filter transmission channel, p1 is the measured carrier power at the output end of the radio station, and p2 is the measured carrier power at the output end of the filter.

[0040] In another embodiment of the present application, for in-situ detection of the performance of the communication system receiving channel, step two is specifically:

[0041] First, the communication system receiving channel detection scene is configured; the radio frequency signal input and output port of the short wave or ultra-short wave radio station of the communication system is connected with the communication signal output port of the detection equipment, the detection equipment and the communication system are powered on, the on-board earphone is connected, and the squelch switch of the radio station is turned on;

[0042] Secondly, the main control unit of the control component in the detection device adopts SPI serial communication protocol to control the radio frequency module of the radio frequency signal generating component to generate analog communication signals, which are fed into the short wave or ultra-short wave radio station through the communication signal output port of the detection device; wherein the carrier frequency of the analog communication signal is consistent with the frequency of the on-board radio station, and the modulation mode is consistent with the modulation mode of the on-board radio station (AM, FM, USB or LSB); in AM, USB and LSB modes, the modulation frequency of the detection device is set to 1000 Hz, and the modulation degree is set to 30%; in FM mode, the modulation frequency of the detection device is set to 1000 Hz, and the modulation frequency deviation is set to 6000 Hz;

[0043] Thirdly, the main control unit of the control component in the detection device controls the programmable attenuator of the radio frequency signal generating component to gradually increase the energy of the analog communication signal, and when a single tone sound is heard in the earphone, the energy value is the noise opening sensitivity of the receiver;

[0044] Fourthly, the main control unit of the control component in the detection device controls the programmable attenuator of the radio frequency signal generating component to gradually decrease the energy of the analog communication signal, and when the single tone sound disappears in the earphone, the energy value is the noise closing sensitivity of the receiver;

[0045] Finally, according to the automatically recorded noise opening and closing sensitivities, the main control unit of the control component in the detection device applies formula (3) to calculate the quieting return loss, and according to different models of radio stations, different fault diagnosis thresholds are adopted to perform fault diagnosis on the detection results of the noise opening and closing sensitivities and the quieting return loss, and the detection data and the diagnosis results are sent to the touch display for display; if the diagnosis result is qualified, “PASS” is displayed after the corresponding detection data; if the diagnosis result is unqualified, “ERR” is displayed after the corresponding detection data;

[0046] SH = 20 log (B / A) (3) 10 (B / A) (3)

[0047] Wherein, SH is the quieting return loss, A is the noise closing sensitivity, and B is the noise opening sensitivity;

[0048] In addition, if there is a filter in the communication system, the port of the filter connected to the antenna is connected to the communication signal output port of the detection device, the filter end noise opening and closing sensitivities are detected according to the above method of detecting the radio station end noise opening and closing sensitivities, the main control unit of the control component in the detection device will apply formula (4) to calculate the insertion loss of the filter receiving channel according to the automatically recorded radio station end noise opening sensitivity and filter end noise opening sensitivity, and perform fault diagnosis according to the filter receiving channel detection standard, and finally send the detection data of the receiving channel insertion loss to the touch display for display, and display “PASS” for qualified and “ERR” for unqualified after the detection data;

[0049] ILRX = 10 log 10 (B / C) (4)

[0050] wherein, IL RX is the filter receive channel insertion loss, B is the measured open-coverage sensitivity at the radio output end, and C is the measured open-coverage sensitivity at the filter output end.

[0051] In still another embodiment of the present application, for the compass receiver function detection, step three is specifically:

[0052] First, the scene configuration for the compass function detection is performed; the navigation signal output port of the detection device is connected with the antenna 4, and the detection device is placed below the airplane, and the antenna 4 is parallel to the airplane and is aligned with the compass receiver ring antenna and the vertical antenna; the detection device and the radio compass are powered on, and the on-board earphone is connected;

[0053] Second, the main control unit of the control component in the detection device controls the radio frequency module of the radio frequency signal generation component by using the SPI serial communication protocol, and the generated compass receiver directional signal and the received signal are simulated, and the signals are transmitted through the antenna 4;

[0054] Third, when the compass receiver receives the directional signal, the compass indicator, the multifunction display, and the flat display of the airplane point to the transmission direction of the directional signal;

[0055] Fourth, if the directional indication of the compass is unstable, the main control unit controls the radio frequency module to reduce the energy of the compass simulation signal, so that the reflection of the compass simulation signal in the hangar is weakened, and the interference on the compass orientation is reduced;

[0056] Finally, when the compass receiver receives the received signal modulated by the audio signal, a clear 1000Hz single tone sound can be heard in the earphone.

[0057] In still another embodiment of the present application, for the directional instrument function detection, step three is specifically:

[0058] First, the scene configuration for the directional instrument function detection is performed; the navigation signal output port of the detection device is connected with the antenna 4, and the detection device is placed at a distance of 3-5 meters from the directional instrument antenna 3; the detection device and the directional instrument are powered on, and the on-board earphone is connected;

[0059] Second, the main control unit of the control component in the detection device controls the radio frequency module of the radio frequency signal generation component by using the SPI serial communication protocol, and the generated directional instrument directional signal and the monitoring signal are simulated, and the signals are transmitted through the antenna 4;

[0060] Third, when the directional instrument receives the directional signal, the directional instrument indicator on the airplane, the multi-functional display, and the directional instrument azimuth of the flat display will point to the emission direction of the directional signal.

[0061] Finally, when the directional instrument receives the audio signal modulated monitoring signal, a clear 1000Hz single tone sound can be heard in the earphone.

[0062] In another embodiment of the present application, for beacon receiver function detection, step three is specifically:

[0063] First, the scene configuration of the beacon function is performed; the navigation signal output port of the detection equipment is connected with the antenna 4, and the detection equipment is placed below the airplane, and the antenna 4 is aligned with the beacon antenna vertically; the detection equipment and the beacon are powered on, and the on-board earphone is connected;

[0064] Secondly, the main control unit of the control component in the detection equipment controls the radio frequency module of the radio frequency signal generating component by using the SPI serial communication protocol, simulates three kinds of beacon signals of the far station (3000Hz), the middle station (1300Hz) and the near station (400Hz), and selects one kind of signal to be transmitted out through the antenna 4 according to the detection requirement;

[0065] Finally, after the beacon receiver receives the beacon analog signal modulated by the audio signal, a signal is sent to light the corresponding far station, middle station and near station indicator light, and the corresponding audio prompt is given.

[0066] In another embodiment of the present application, for the heading and glide receiver function detection, step three is specifically:

[0067] First, the scene configuration of the heading and glide receiver function detection is performed; the navigation signal output port of the detection equipment is connected with the antenna 4, and the detection equipment is placed at a distance of 3-5 meters from the heading and glide receiver antenna 3; the detection equipment and the heading and glide receiver are powered on, and the on-board earphone is connected;

[0068] Secondly, the main control unit of the control component in the detection equipment controls the radio frequency module of the radio frequency signal generating component by using the SPI serial communication protocol, simulates the heading analog signal (including the left deviation, right deviation and center position signal) and the glide analog signal (including the upward deviation, downward deviation and center position signal), and selects the heading or glide signal to be transmitted out through the antenna 4 according to the detection requirement;

[0069] Third, the heading receiver receives the heading analog signal modulated by the audio signal added by three components (1020Hz, 90Hz and 150Hz), the angle deviating from the runway center is measured by comparing the components of the two audio signals, and is displayed on the onboard heading indicator, multifunction display and flat display, and the identification sound of 1020Hz is in the earphone;

[0070] Finally, the glide receiver receives the glide analog signal modulated by the audio signal added by two components (90Hz and 150Hz), the angle deviating from the runway center is measured by comparing the components of the two audio signals, and is displayed on the onboard glide indicator, multifunction display and flat display.

[0071] The device and method of the application aim to solve the technical problems that the hidden faults of the field communication system cannot be found, the navigation system requires many one-line maintenance support devices, and the compass signal cannot be received in the hangar and hangar, resulting in that the compass cannot be checked.

[0072] The application solves the problems in the prior art. The application can quickly complete the one-line in-situ performance detection of short-wave radio, ultra-short-wave radio, filter, power adder, antenna and other communication equipment, and can also complete the in-situ function check of the radio compass, directional instrument, beacon machine, heading receiver and glide receiver in the navigation system. The check instrument has small volume and light weight, is operated by full-touch screen, has simple and clear operation interface, and is flexible and convenient to use. The application has wide application prospect and can be applied to the check of communication and navigation equipment of various models.

[0073] Specifically as follows:

[0074] Firstly, the one-line maintenance support process of the communication system is realized, the problem that the communication system has no performance detection means in the field and the hidden faults cannot be found is solved, and the fault can be quickly and accurately located when the fault is found.

[0075] Secondly, the check of multiple airborne navigation equipment can be completed by using one check instrument, the original work time of nearly one hour is shortened to 10 minutes, and the work efficiency is greatly improved.

[0076] Thirdly, the blank of the one-line maintenance support device for the airborne radio compass is filled, the technical problem that the function of the compass cannot be detected in the hangar and hangar is solved, the radio compass of the airplane in the hangar and hangar can be checked without being pushed out, the work time is saved, and the work efficiency is improved.

[0077] Fourthly, the check instrument has small volume and light weight, is convenient to carry out, and solves the problem that the support devices are too many and cannot be carried out.

[0078] Fifthly, the check instrument is operated by full-touch display, the operation interface is friendly, the check items are designed in one-key mode, and the check instrument is convenient and fast to use.

[0079] Sixth, with fault diagnosis, query, record function, can compare and analyze the trend of the test results. BRIEF DESCRIPTION OF DRAWINGS

[0080] Figure 1 The portable communication navigation system detection equipment composition diagram of the application;

[0081] Figure 2 The host computer of the portable communication navigation system detection equipment of the application is shown in the schematic diagram;

[0082] Figure 3 The host computer of the portable communication navigation system detection equipment of the application is shown in the schematic diagram;

[0083] Figure 4 The portable communication navigation system detection equipment structure diagram of the application;

[0084] Figure 5 The communication navigation system detection method of the application is shown in the schematic diagram;

[0085] Figure 6 The communication navigation system detection method of the application is shown in the schematic diagram;

[0086] Figure 7 The method for in-situ detection of the performance of the airborne communication system of the application is shown in the flow chart;

[0087] Figure 8 The method for in-situ detection of the performance of the airborne communication system of the application is shown in the flow chart;

[0088] The drawings show that: 1, the host computer; 2, the feeder; 3, the radio frequency conversion connector; 4, the antenna; 5, the power adapter; 11, the body; 12, the touch display; 13, the battery cover plate; 14, the power button; 15, the radiator; 16, the charging interface; 17, the radio frequency interface. DETAILED DESCRIPTION

[0089] According to the working principle of the aircraft communication system and navigation system, the application aims to solve the technical problems that the hidden faults of the communication system cannot be found in the field maintenance support, the navigation system has many maintenance support devices, and the compass signal cannot be received in the hangar, which leads to the failure of the compass inspection. The portable aircraft communication navigation system detection equipment mainly completes the following functions:

[0090] Detecting the carrier power and carrier frequency of the short wave and ultrashort wave radio transmitter;

[0091] Detecting the radio frequency feeder and antenna standing wave ratio;

[0092] Detecting the on-off noise sensitivity and quieting hysteresis of the short wave and ultrashort wave radio receiver;

[0093] - insertion loss of the detection filter;

[0094] - analog compass navigation station signal;

[0095] - analog directional finder signal;

[0096] - analog beacon station signal;

[0097] - analog homing station signal;

[0098] - analog glide path station signal;

[0099] - fault diagnosis and inquiry of detection parameters of the communication system;

[0100] The application will be further described in detail below with reference to the accompanying drawings.

[0101] As Figure 1 shown is a portable aircraft communication navigation system detection device (hereinafter referred to as "detection device") of the application, comprising a host computer 1, a feeder 2, a radio frequency conversion joint 3, an antenna 4 and a power adapter 5. The host computer 1 is the core of the detection device, used for performance detection of the communication system and function detection of the navigation system; the feeder 2 and the radio frequency conversion joint 3 are used for connection of the host computer 1 and short wave radio station, ultra-short wave radio station, filter and other communication system components, the application provides six kinds of conversion joints of BNC female / N male, BNC female / TNC male, BNC female / M male, BNC female / SMA male, BNC female / N female and BNC female / TNC female, which expands the use range of the application; the antenna 4 adopts a telescopic pull rod type antenna, different lengths are selected according to different signal frequencies, used for emitting analog signals of compass navigation station, beacon station, homing station, glide path station and directional finder; the power adapter 5 is used for connecting 220V power supply to charge the host computer.

[0102] As Figure 2 shown, the host computer 1 comprises a hollow body 11 in the shape of a generally flat cuboid, the body 11 cavity is provided with a radio frequency signal analysis assembly, a radio frequency signal generation assembly, a control assembly and a power supply assembly, the front surface of the host computer 1 is provided with a touch display 12; the back surface of the host computer 1 is provided with a battery cavity; the battery cavity is a rectangular hollow cavity formed by the battery cover plate 13 and the body 11, a lithium battery is placed in the battery cavity; one side surface of the host computer 1 is provided with a power button 14 and a radiator 15; the upper surface of the host computer 1 is provided with a charging port 16 and a radio frequency interface 17, the radio frequency output port, the radio frequency input 1 port, the radio frequency input 2 port and the communication signal output port in the radio frequency interface 17 are connected with the radio frequency conversion joint 3 through the feeder 2, the navigation signal output port in the radio frequency interface 17 is connected with the antenna 4; the lower surface of the host computer 1 is provided with a USB interface 18 and a reset button 19. Figure 3The device is equipped with a USB interface 18 and a Micro SD card interface 19. The structure and connection method of the battery, USB interface 18, SD card interface 19, touch display 12, battery compartment, power button 14, heat sink 15, charging port 16 and RF interface 17 are well known to those skilled in the art and will not be described in detail here.

[0103] like Figure 4 As shown, the RF signal analysis component in body 11 is used to collect and analyze aircraft communication signals fed in via feeder 2 through RF input port 1 and RF input port 2, and calculate the carrier power, carrier frequency, antenna VSWR, and filter insertion loss of shortwave and VHF radios. The RF signal analysis component includes a VSWR analysis module, a power / frequency analysis module, a 30dB attenuator, two RF input ports, and one RF output port. The VSWR analysis module collects aircraft communication signals input through RF input port 1 and output through RF output port to the antenna, measures the analog voltage values ​​of the forward and reverse power of the communication system, and sends them to the power / frequency analysis module. The power / frequency analysis module collects aircraft communication signals input through RF input port 2 and attenuated by the 30dB attenuator, performs signal attenuation and distribution through an internal resistor network, outputs the average power analog voltage value through one path for detection, and outputs the carrier frequency digital value through the other path for frequency measurement. The analog voltage values ​​and frequency digital values ​​output from both paths are sampled and quantized by the microcontroller inside the power / frequency analysis module to calculate the carrier power and carrier frequency of the signal. Simultaneously, the microcontroller inside the power / frequency analysis module samples and quantizes the analog voltage values ​​of forward and reverse power sent by the standing wave analysis module, calculating the forward power, reverse power, and standing wave ratio. The carrier power, carrier frequency, forward power, reverse power, and standing wave ratio are collectively used as detection data and output to the main control unit of the control component.

[0104] The radio frequency signal generating component is used to generate analog communication signals and analog navigation signals with adjustable power for the quantitative test of the receiver sensitivity of the communication system and the function check of the navigation system receiver. The radio frequency signal generating component comprises a radio frequency module, a program-controlled attenuator, a communication signal output port and a navigation signal output port. The radio frequency module mainly generates analog communication signals and analog navigation signals. The analog communication signals are: 2-30MHz (HF) and 108-400MHz (V / UHF) communication carrier signals, 1000Hz audio signals, the above upper side band (USB) / lower side band (LSB) modulation mode, 30% modulation depth modulated to the HF carrier signal, 30% modulation depth modulated to the V / UHF carrier signal in amplitude modulation (AM) mode, 6000Hz modulation frequency offset modulated to the V / UHF carrier signal in frequency modulation (FM) mode. The analog navigation signals are: 0.15-1.75MHz compass carrier signals, 123MHz-247MHz directional instrument carrier signals, 75MHz beacon carrier signals, 108.10-111.95MHz heading carrier signals, 329.15-335.00MHz glide carrier signals. The frequency of the controllable audio signal is 1000Hz, which is used to simulate the reception signal of the compass and the listening signal of the directional instrument. The frequency of the controllable audio signal is 400Hz, 1300Hz, 3000Hz, which is used to simulate the beacon far station, middle station and near station signal respectively. The frequency of the controllable audio signal is 1020Hz, which is used to simulate the identification signal of the instrument landing station. The frequency of the two groups of audio signals is 90Hz and 150Hz, and the composition of the two signals can be changed to simulate different heading and glide deviation information, and one or both of the signals can be deleted to simulate the alarm condition. The analog navigation signals in the radio frequency module can be adjusted in energy to qualitatively check the receiver sensitivity of each navigation device; the program-controlled attenuator can continuously adjust the power of the analog communication signals from-50dBm to-120dBm with 1dB step and output, which can meet the test requirements of the receiver sensitivity of the short wave radio station and the ultra-short wave radio station; the communication signal output port is used to output the analog communication signals; the navigation signal output port is used to output the analog navigation signals generated by the radio frequency module.

[0105] The control component is used to complete the man-machine interaction and the system control of the whole machine. The control component comprises a main control unit, a touch display, a USB interface and a Micro SD card interface. The main control unit is mainly used to control the touch display to realize the man-machine interaction, control the radio frequency module in the radio frequency signal generating component to generate corresponding analog communication signals and analog navigation signals, control the programmable attenuator in the radio frequency signal generating component to make the analog communication signal power continuously adjustable, receive the detection data sent by the receiving radio frequency signal analyzing component and perform error compensation and display, collect the power information sent by the power management component and display, send the power-on and power-off instructions of each component to the power management component, perform fault diagnosis, inquiry and record on the detection result; the touch display is used to complete the function of the man-machine interaction, including the display of the detection result, the parameter change of the analog communication signals and the analog navigation signals, the change of the system time, the brightness adjustment of the touch display, the switching of the detection interface and various input instructions and output displays; the USB interface is used for the software upgrade of the main control unit and the data export of the detection result; and the Micro SD card interface is used for the software upgrade of the touch display.

[0106] The power component is used to supply power for other components. The power component comprises a lithium battery, a power management module, a power adapter and a charging port. The lithium battery provides +12V voltage to supply power for the whole machine of the detection equipment; the power management module converts the +12V power supply voltage of the lithium battery into +3.3V and +5V stable voltages required by each component, and sends the power information of the battery to the main control unit in the control component, and simultaneously receives the control instructions from the main control unit, and powers off a certain component when it is not needed to work, thereby saving the battery power; the power adapter is connected with a 220V power supply, and the power management module is connected with the power adapter through the charging port to charge the lithium battery.

[0107] As shown in Figure 5 and Figure 6 , the detection method of the aircraft communication navigation system of the application comprises the following specific implementation steps:

[0108] Step one: according to the detection needs, selecting the detection object and configuring the detection scene. The communication and navigation system objects can be selected for detection, or one or several objects can be detected. According to different detection objects, the feeder 2 or the antenna 4 of the detection equipment is connected, and the corresponding detection parameters are configured.

[0109] Step two: applying the detection equipment to complete the in-situ performance detection of the airborne communication system, including in-situ detection of the communication system standing wave ratio; in-situ detection of the communication system transmission channel performance; in-situ detection of the communication system receiving channel performance.

[0110] Step three: applying the detection equipment to complete the in-situ function detection of the airborne navigation system, including the function detection of the compass receiver; the function detection of the beacon receiver; the function detection of the directional instrument; the function detection of the heading and glide receiver.

[0111] Step four: the main control unit of the detection equipment which controls the display component can store 16 times of detection results for user inquiry, including the date of each detection, the model of the radio, the number, the filter number and various performance parameters and diagnosis results.

[0112] Step five:

[0113] Connect the detection equipment with the computer through the USB data line, and import the detection result data stored in the detection equipment into the data recording software in the computer.

[0114] Further, as shown in Figure 7 , step two is specifically:

[0115] 1. In-situ detection of the standing wave ratio of the antenna of the communication system

[0116] First, the standing wave ratio detection scene configuration is performed. The radio frequency signal input and output port of the short wave or ultra-short wave radio of the communication system is connected with the radio frequency input 1 port of the detection equipment, if there is a filter in the communication system, the port of the filter connected with the antenna is connected with the radio frequency input 1 port of the detection equipment, and the radio frequency output port of the detection equipment is connected with the antenna of the communication system. Power on the detection equipment and the communication system, press the talk button, and the communication system transmits signals. The signals are fed into the detection equipment through the radio frequency input 1 port and fed out to the antenna of the communication system through the radio frequency output port, and the signals are radiated by the antenna;

[0117] Secondly, the standing wave analysis module of the radio frequency signal analysis component in the detection equipment collects and analyzes the transmitted signals, measures the analog voltage values of the forward power, the reverse power and the standing wave ratio of the communication system, and sends the voltage values to the power / frequency analysis module of the radio frequency signal analysis component;

[0118] Thirdly, the single-chip microcomputer inside the power / frequency analysis module samples and quantizes the analog voltage values to obtain the detection data of the forward power and the reverse power, according to the two detection data, applies formula (1) to calculate the standing wave ratio, and sends the detection data of the forward power, the reverse power and the standing wave ratio to the main control unit in the control component.

[0119]

[0120] Wherein SWR is the standing wave ratio, P P is the forward power, P R is the reverse power;

[0121] Finally, the main control unit compensates errors of the forward power, reverse power and VSWR detection data, and simultaneously, according to different models of the radio station, adopts different fault diagnosis thresholds to perform fault diagnosis on the detection results of the forward power, reverse power and VSWR, and sends the detection data and the diagnosis results to the touch display for display. If the diagnosis results are qualified, "PASS" is displayed after the corresponding detection data. If the diagnosis results are unqualified, "ERR" is displayed after the corresponding detection data.

[0122] 2. In-situ detection of communication system transmission channel performance

[0123] Firstly, a communication system transmission channel detection scene is configured. The radio frequency signal input and output ports of a short wave or ultra-short wave radio station of the communication system are connected with the radio frequency input 2 port of the detection device, the detection device and the communication system are powered on, the talk button is pressed down, and the communication system transmits signals;

[0124] Secondly, the transmitted signals are firstly attenuated by a 30dB attenuator, and then attenuated and distributed by an internal resistance network of the power / frequency analysis module. One way is to output a carrier power analog voltage value, and the other way is to output a carrier frequency digital value for frequency measurement;

[0125] Thirdly, the analog voltage value and the frequency digital value of the two ways of output are sampled and quantized by a single-chip microcomputer inside the power / frequency analysis module, the detection data of the carrier power and the carrier frequency of the signals are calculated, and the two detection data are sent to the main control unit in the control assembly;

[0126] Finally, the main control unit compensates errors of the carrier power and the carrier frequency detection data, and simultaneously, according to different models of the radio station, adopts different fault diagnosis thresholds to perform fault diagnosis on the detection results of the carrier power, the carrier frequency and the filter transmission channel insertion loss, and sends the detection data and the diagnosis results to the touch display for display. If the diagnosis results are qualified, "PASS" is displayed after the corresponding detection data. If the diagnosis results are unqualified, "ERR" is displayed after the corresponding detection data;

[0127] In addition, if there is a filter in the communication system, the port of the filter connected with the antenna is connected with the radio frequency input 2 port of the detection device, and the carrier power at the filter end is detected by the method of detecting the carrier power at the radio station end as described above. According to the carrier power at the output end of the radio station and the carrier power at the output end of the filter, the main control unit of the control assembly in the detection device applies formula (2) to calculate the insertion loss of the filter transmission channel, performs fault diagnosis according to the filter transmission channel detection standard, and finally sends the detection data of the transmission insertion loss to the touch display for display, and displays "PASS" for qualified and "ERR" for unqualified after the detection data.

[0128] ILTX = 10 log 10 (p1 / p2) (2)

[0129] wherein, IL TX is filter transmit channel insertion loss, p1 is the carrier power measured at the radio output terminal, and p2 is the carrier power measured at the filter output terminal.

[0130] 3. In-situ detection of communication system receive channel performance

[0131] First, the communication system receive channel detection scene is configured. The radio frequency signal input and output ports of the short wave or ultra-short wave radio of the communication system are connected to the communication signal output ports of the detection device, the detection device and the communication system are powered on, the on-board earphone is connected, and the squelch switch of the radio is turned on.

[0132] Secondly, the main control unit of the control component in the detection device uses the SPI serial communication protocol to control the radio frequency module of the radio frequency signal generation component to generate an analog communication signal, which is fed into the short wave or ultra-short wave radio through the communication signal output port of the detection device. The carrier frequency of the analog communication signal is consistent with the frequency of the on-board radio, and the modulation mode is consistent with the modulation mode of the on-board radio (AM, FM, USB or LSB). In AM, USB and LSB modes, the modulation frequency of the detection device is set to 1000 Hz, and the modulation degree is set to 30%. In FM mode, the modulation frequency of the detection device is set to 1000 Hz, and the modulation frequency offset is set to 6000 Hz.

[0133] Thirdly, the main control unit of the control component in the detection device controls the programmable attenuator of the radio frequency signal generation component to gradually increase the energy of the analog communication signal. When the tone is heard in the earphone, the energy value is the squelch sensitivity of the receiver.

[0134] Fourthly, the main control unit of the control component in the detection device controls the programmable attenuator of the radio frequency signal generation component to gradually decrease the energy of the analog communication signal. When the tone disappears in the earphone, the energy value is the squelch sensitivity of the receiver.

[0135] Finally, the main control unit of the control component in the detection device calculates the squelch hysteresis according to the automatically recorded squelch sensitivity and the formula (3), and performs fault diagnosis on the detection results of the squelch sensitivity and the squelch hysteresis according to different models of radios using different fault diagnosis thresholds. The detection data and the diagnosis results are sent to the touch display for display. If the diagnosis result is qualified, "PASS" is displayed after the corresponding detection data. If the diagnosis result is not qualified, "ERR" is displayed after the corresponding detection data.

[0136] SH = 20 log 10 (B / A) (3)

[0137] wherein SH is the squelch hysteresis, A is the on-squelch sensitivity, and B is the off-squelch sensitivity;

[0138] In addition, if there is a filter in the communication system, the port of the filter connected to the antenna is connected to the communication signal output port of the detection device, and the on-squelch sensitivity and off-squelch sensitivity of the filter end are detected by the above-mentioned method of detecting the on-squelch sensitivity and off-squelch sensitivity of the radio station end. The main control unit of the control assembly in the detection device will calculate the insertion loss of the filter receiving channel according to the automatically recorded on-squelch sensitivity of the radio station end and the on-squelch sensitivity of the filter end, apply formula (4), and perform fault diagnosis according to the filter receiving channel detection standard. Finally, the detection data of the insertion loss of the receiving channel is sent to the touch display for display, and "PASS" is displayed as qualified and "ERR" is displayed as unqualified after the detection data.

[0139] IL RX = 10 log 10 (B / C) (4)

[0140] wherein IL RX is the insertion loss of the filter receiving channel, B is the on-squelch sensitivity measured at the radio output end, and C is the on-squelch sensitivity measured at the filter output end.

[0141] Further, as shown in FIG. 3, step three is specifically: Figure 8

[0142] 1. Compass receiver function detection

[0143] First, the scene configuration for compass function detection is performed. The navigation signal output port of the detection device is connected to the antenna 4, and the detection device is placed below the airplane, with the antenna 4 parallel to the airplane and aligned with the compass receiver loop antenna and the vertical antenna. The detection device and the radio compass are powered on, and the on-board earphone is connected;

[0144] Second, the main control unit of the control assembly in the detection device controls the radio frequency module of the radio frequency signal generation assembly using the SPI serial communication protocol to simulate the compass receiver directional signal and the reception signal, which are transmitted by the antenna 4;

[0145] Fifth, when the compass receiver receives the directional signal, the compass indicator on the airplane, the multifunction display, and the flat display will point to the direction of the directional signal emission.

[0146] Sixth, if the directional indication of the compass is unstable, the main control unit controls the radio frequency module to reduce the energy of the compass simulation signal, so that the reflection of the compass simulation signal in the hangar is weakened, and the interference to the compass orientation is reduced.

[0147] ​Finally, when the compass receiver receives the audio signal modulated reception signal, a clear 1000Hz single tone can be heard in the earphone.

[0148] 2. Compass function detection

[0149] First, the scene configuration of the compass function detection is performed. The navigation signal output port of the detection device is connected to the antenna 4, and the detection device is placed 3-5 meters away from the compass antenna 3. The detection device and the compass are powered on, and the on-board earphone is connected.

[0150] Secondly, the main control unit of the control component in the detection device controls the radio frequency module of the radio frequency signal generation component using the SPI serial communication protocol, simulates the directional signal and the listening signal of the compass, and the signals are transmitted through the antenna 4;

[0151] Thirdly, when the compass receives the directional signal, the directional indicator of the compass on the plane, the multifunctional display, and the flat display will point to the direction of the directional signal emission;

[0152] Finally, when the compass receives the audio signal modulated listening signal, a clear 1000Hz single tone can be heard in the earphone.

[0153] 3. Beacon receiver function detection

[0154] First, the scene configuration of the beacon function is performed. The navigation signal output port of the detection device is connected to the antenna 4, and the detection device is placed below the plane, with the antenna 4 perpendicular to the plane and aligned with the beacon antenna. The detection device and the beacon are powered on, and the on-board earphone is connected;

[0155] Secondly, the main control unit of the control component in the detection device controls the radio frequency module of the radio frequency signal generation component using the SPI serial communication protocol, simulates the three beacon signals of the far station (3000Hz), the middle station (1300Hz), and the near station (400Hz), and according to the detection requirements, selects one of the signals to be transmitted through the antenna 4;

[0156] Finally, after the beacon receiver receives the audio signal modulated beacon simulation signal, it will emit a signal to light up the corresponding far, middle, and near station indicator lights, and there will be corresponding audio prompts.

[0157] 4. Heading and glide receiver function detection

[0158] First, the scene configuration of the heading and glide receiver function detection is performed. The navigation signal output port of the detection device is connected to the antenna 4, and the detection device is placed 3-5 meters away from the heading and glide receiver antenna. The detection device and the heading and glide receiver are powered on, and the on-board earphone is connected.

[0159] Secondly, the main control unit of the control component in the detection equipment adopts SPI serial communication protocol to control the radio frequency module of the radio frequency signal generating component, analog generates the heading analog signal (including the signal of left deviation, right deviation and center position) and the glide analog signal (including the signal of up deviation, down deviation and center position), and according to the detection requirement, selects the heading or glide signal to be transmitted through the antenna 4;

[0160] Thirdly, the heading receiver receives the heading analog signal modulated by the audio signal of three components (1020 Hz, 90 Hz and 150 Hz), measures the angle of deviation from the center of the runway by comparing the components of two kinds of audio signals, and displays on the on-board heading indicator, multi-functional display and flat display, and there is a 1020 Hz identification sound in the earphone;

[0161] Finally, the glide receiver receives the glide analog signal modulated by the audio signal of two components (90 Hz and 150 Hz), measures the angle of deviation from the center of the runway by comparing the components of two kinds of audio signals, and displays on the on-board glide indicator, multi-functional display and flat display.

Claims

1. A portable aircraft communication and navigation system detection device, comprising a host computer (1), a feeder line (2), a radio frequency conversion joint (3), an antenna (4), and a power adapter (5); characterized in that the host computer (1) comprises a hollow body (11) in which a radio frequency signal analysis assembly, a radio frequency signal generation assembly, a control assembly, a battery, a USB interface (18), and an SD card interface (19) are arranged; the surface of the host computer (1) is provided with a touch display (12), a battery cavity, a power button (14), a heat sink (15), a charging port (16), and a radio frequency interface (17); the battery is arranged in the battery cavity; the radio frequency output port, the radio frequency input 1 port, the radio frequency input 2 port, and the communication signal output port in the radio frequency interface (17) are connected with the radio frequency conversion joint (3) through the feeder line (2), and the navigation signal output port in the radio frequency interface (17) is connected with the antenna (4); the power adapter (5) is used for connecting a power supply to charge the host computer (1); and wherein the radio frequency signal analysis assembly in the body (11) is used for collecting and analyzing aircraft communication signals fed in through the radio frequency input 1 port and the radio frequency input 2 port via the feeder line (2), and calculating the carrier power, the carrier frequency, the antenna standing wave ratio, and the filter insertion loss of a short wave radio station and an ultrashort wave radio station; the radio frequency signal analysis assembly comprises a standing wave analysis module, a power / frequency analysis module, a 30dB attenuator, two radio frequency input ports, and one radio frequency output port; the standing wave analysis module measures the analog voltage values of the forward power and the reverse power of the communication system by collecting the aircraft communication signals input by the radio frequency input 1 port and output to the antenna by the radio frequency output port, and sends the analog voltage values to the power / frequency analysis module; the power / frequency analysis module collects the aircraft communication signals input by the radio frequency input 2 port and attenuated by the 30dB attenuator, attenuates and distributes the signals through an internal resistance network, outputs the average power analog voltage value through detection on one path, and outputs the carrier frequency digital quantity through frequency measurement on another path; the analog voltage value and the frequency digital quantity output by the two paths are sampled and quantized by a single-chip microcomputer inside the power / frequency analysis module, and the carrier power and the carrier frequency of the signals are calculated; meanwhile, the single-chip microcomputer inside the power / frequency analysis module also samples and quantizes the forward power and the reverse power analog voltage values sent by the standing wave analysis module, and calculates the forward power, the reverse power, and the standing wave ratio; the carrier power, the carrier frequency, the forward power, the reverse power, and the standing wave ratio are collectively used as detection data and output to the main control unit of the control assembly. the radio frequency signal generation assembly is used for generating analog communication signals and analog navigation signals with adjustable power, for use in quantitative test of the receiver sensitivity of the communication system and function check of the receiver of the navigation system; the radio frequency signal generation assembly comprises a radio frequency module, a program-controlled attenuator, a communication signal output port, and a navigation signal output port.

2. The portable aircraft communications and navigation system detection device of claim 1, wherein, ​ The radio frequency module generates analog communication signals and analog navigation signals; wherein the analog communication signals are: 2-30MHz HF and 108-400MHz V / UHF communication carrier signals; 1000Hz audio signals, which are modulated onto the HF carrier signals in the above sideband USB / under sideband LSB modulation mode with a 30% modulation depth, modulated onto the V / UHF carrier signals in the amplitude modulation AM modulation mode with a 30% modulation depth, and modulated onto the V / UHF carrier signals in the frequency modulation FM modulation mode with a 6000Hz modulation frequency offset; the analog navigation signals are: 0.15-1.75MHz compass carrier signals, 123MHz-247MHz directional instrument carrier signals, 75MHz beacon carrier signals, 108.10-111.95MHz heading carrier signals, and 329.15-335.00MHz glide carrier signals; 1000Hz controllable audio signals are used to simulate compass reception signals and directional instrument monitoring signals; three groups of controllable audio signals with frequencies of 400Hz, 1300Hz and 3000Hz are used to simulate beacon far station, middle station and near station signals respectively; 1020Hz controllable audio signals are used to simulate instrument landing station identification signals; two groups of audio signals with frequencies of 90Hz and 150Hz can simulate different heading and glide deviation information by changing the composition of the two signals, and can simulate alarm conditions by deleting one or both of the signals; the analog navigation signals can be adjusted in energy in the radio frequency module to qualitatively check the receiver sensitivity of each navigation device; the programmable attenuator enables the power of the analog communication signals to be continuously adjustable in steps of 1dB from -50dBm to -120dBm and output, to meet the test requirements of shortwave radio and ultrashort wave radio receiver sensitivity; the communication signal output port is used to output the analog communication signals; the navigation signal output port is used to output the analog navigation signals generated by the radio frequency module.

3. The portable aircraft communications and navigation system detection device of claim 1, wherein, The control assembly is used to complete human-computer interaction and system control of the whole machine; the control assembly includes a main control unit, a touch display, a USB interface and an SD card interface; The main control unit controls the touch display to realize human-computer interaction, controls the radio frequency module in the radio frequency signal generation assembly to generate corresponding analog communication signals and analog navigation signals, controls the programmable attenuator in the radio frequency signal generation assembly to continuously adjust the power of the analog communication signals, receives and error compensates the detection data sent by the radio frequency signal analysis assembly and displays the data, collects and displays the power information sent by the power management assembly, sends power-on and power-off instructions of each assembly to the power management assembly, and diagnoses, queries and records the detection results; The touch display completes the function of human-computer interaction, including display of detection results, parameter change of analog communication signals and analog navigation signals, change of system time, brightness adjustment of the touch display, switching of detection interfaces and various input instructions and output displays; The USB interface is used for software upgrade of the main control unit and data export of the detection results. The SD card interface is used for software upgrade of the touch display.

4. A method of detecting a communication and navigation system of an aircraft, characterized in that The specific steps are as follows: Step one: according to the detection needs, select the detection object, configure the detection scene; all objects of the communication and navigation system can be selected for detection, or one or several objects can be detected; according to different detection objects, connect the feeder (2) or antenna (4) of the detection equipment, and configure the corresponding detection parameters; Step two: use the detection equipment to complete the in-situ performance detection of the airborne communication system, including in-situ detection of the standing wave ratio of the communication system; in-situ detection of the transmission channel performance of the communication system; in-situ detection of the receiving channel performance of the communication system; (1) for in-situ detection of the standing wave ratio of the communication system antenna, step two is specifically as follows: First, the standing wave ratio detection scene is configured; the radio frequency signal input and output port of the short wave or ultra-short wave radio of the communication system is connected with the radio frequency input 1 port of the detection equipment, if there is a filter in the communication system, the port of the filter connected with the antenna is connected with the radio frequency input 1 port of the detection equipment, and the radio frequency output port of the detection equipment is connected with the antenna of the communication system; the detection equipment and the communication system are powered on, the talk button is pressed, and the communication system transmits signals; the signals are fed into the detection equipment through the radio frequency input 1 port, and are fed out to the communication system antenna through the radio frequency output port, and the signals are radiated out by the antenna; Secondly, the standing wave analysis module of the radio frequency signal analysis component in the detection equipment collects and analyzes the transmitted signals, measures the analog voltage values of the forward power, reverse power and standing wave ratio of the communication system, and sends the voltage values to the power / frequency analysis module of the radio frequency signal analysis component; Thirdly, the single-chip microcomputer in the power / frequency analysis module samples and quantizes the analog voltage values to obtain the detection data of the forward power and reverse power, calculates the standing wave ratio according to the two detection data by using formula (1), and sends the detection data of the forward power, reverse power and standing wave ratio to the main control unit in the control component: where SWR is the standing wave ratio, P P is the forward power, P R is the reverse power; Finally, the main control unit compensates the errors of the detection data of the forward power, reverse power and standing wave ratio, adopts different fault diagnosis thresholds according to different types of radios to perform fault diagnosis on the detection results of the forward power, reverse power and standing wave ratio, and sends the detection data and diagnosis results to the touch display for display; if the diagnosis result is qualified, "PASS" is displayed after the corresponding detection data; if the diagnosis result is unqualified, "ERR" is displayed after the corresponding detection data; (2) for in-situ detection of the transmission channel performance of the communication system, step two is specifically as follows: First, the communication system transmission channel detection scene is configured; the radio frequency signal input and output port of the short wave or ultra-short wave radio of the communication system is connected with the radio frequency input 2 port of the detection equipment, the detection equipment and the communication system are powered on, and the talk button is pressed to make the communication system transmit signals; Secondly, the transmitted signals are first attenuated by a 30dB attenuator, and then the signal energy is attenuated and distributed by the internal resistance network of the power / frequency analysis module, one way is to output the carrier power analog voltage value, and the other way is to output the carrier frequency digital quantity; Third, the analog voltage value and frequency digital quantity of two-way output are sampled and quantified by the single-chip microcomputer inside the power / frequency analysis module, and the detection data of the carrier power and carrier frequency of the signal are calculated, and the two detection data are sent to the main control unit in the control assembly; Finally, the main control unit performs error compensation on the carrier power and carrier frequency detection data, and according to different models of the radio station, different fault diagnosis thresholds are adopted to perform fault diagnosis on the detection results of the carrier power, carrier frequency and filter transmission channel insertion loss, and the detection data and diagnosis results are sent to the touch display for display; if the diagnosis result is qualified, "PASS" is displayed after the corresponding detection data; if the diagnosis result is unqualified, "ERR" is displayed after the corresponding detection data; In addition, if there is a filter in the communication system, the port of the filter connected to the antenna is connected to the radio frequency input 2 port of the detection equipment, and the carrier power at the filter end is detected according to the above method of detecting the carrier power of the radio station; the main control unit of the control assembly in the detection equipment calculates the insertion loss of the filter transmission channel according to the carrier power at the output end of the radio station and the carrier power at the output end of the filter by using formula (2), and performs fault diagnosis according to the filter transmission channel detection standard, and finally sends the detection data of the transmission insertion loss to the touch display for display, and displays "PASS" for qualified and "ERR" for unqualified after the detection data; IL = 10 log (p1 / p2) (1) Tx IL = 10 log (p1 / p2) (1) wherein IL is the filter insertion loss of the transmitting channel, p1 is the carrier power measured at the radio output, and p2 is the carrier power measured at the filter output. (3) For in-situ detection of the performance of the communication system receiving channel, step two is specifically: First, the communication system receiving channel detection scene is configured; the radio frequency signal input / output port of the short wave or ultra-short wave radio station of the communication system is connected to the communication signal output port of the detection equipment, the detection equipment and the communication system are powered on, the on-board earphone is connected, and the squelch switch of the radio station is turned on; Secondly, the main control unit of the control assembly in the detection equipment controls the radio frequency module of the radio frequency signal generation assembly to generate an analog communication signal, which is fed into the short wave or ultra-short wave radio station through the communication signal output port of the detection equipment; wherein the carrier frequency of the analog communication signal is consistent with the frequency of the on-board radio station, and the modulation mode is consistent with the modulation mode of the on-board radio station; in AM, USB and LSB modes, the modulation frequency of the detection equipment is set to 1000Hz, and the modulation degree is set to 30%; in FM mode, the modulation frequency of the detection equipment is set to 1000Hz, and the modulation frequency offset is set to 6000Hz; Thirdly, the main control unit of the control assembly in the detection equipment controls the programmable attenuator of the radio frequency signal generation assembly to gradually increase the energy of the analog communication signal, and when the tone is heard in the earphone, the energy value is the noise-on sensitivity of the receiver; Fourthly, the main control unit of the control assembly in the detection equipment controls the programmable attenuator of the radio frequency signal generation assembly to gradually decrease the energy of the analog communication signal, and when the tone disappears in the earphone, the energy value is the noise-off sensitivity of the receiver; Finally, the main control unit of the control assembly in the detection equipment calculates the quieting return loss according to the automatically recorded on-off noise sensitivity by using formula (3), and performs fault diagnosis on the detection results of the on-off noise sensitivity and the quieting return loss according to different types of radios, and sends the detection data and the diagnosis results to the touch display for display; if the diagnosis result is qualified, "PASS" is displayed after the corresponding detection data; if the diagnosis result is unqualified, "ERR" is displayed after the corresponding detection data; SH = 20 log 10 (B / A) (3) Wherein, SH is the quieting return loss, A is the off noise sensitivity, and B is the on noise sensitivity; In addition, if there is a filter in the communication system, the port of the filter connected with the antenna is connected with the communication signal output port of the detection equipment, the on-off noise sensitivity of the filter end is detected according to the above method of detecting the on-off noise sensitivity of the radio end, and the main control unit of the control assembly in the detection equipment will calculate the insertion loss of the filter receiving channel according to the automatically recorded on noise sensitivity of the radio end and the on noise sensitivity of the filter end by using formula (4), and perform fault diagnosis according to the filter receiving channel detection standard, finally, the detection data of the receiving channel insertion loss is sent to the touch display for display, and "PASS" is qualified and "ERR" is unqualified after the detection data is displayed; IL RX = 10 log 10 (B / C) (4) wherein IL RX is the filter insertion loss for the receive path, B is the measured open- key sensitivity at the radio output, and C is the measured open-key sensitivity at the filter output. Step three: complete the in-situ function detection of the airborne navigation system by using the detection equipment, including the function detection of the compass receiver, the function detection of the beacon receiver, the function detection of the directional instrument, and the function detection of the heading and glide receiver; (1) For the function detection of the compass receiver, step three is specifically: Firstly, the scene configuration for the function detection of the compass is performed; the navigation signal output port of the detection equipment is connected with the antenna (4), and the detection equipment is placed below the airplane, and the antenna (4) is parallel to the compass receiver loop antenna and the vertical antenna; the detection equipment and the radio compass are powered on, and the on-board earphone is connected; Secondly, the main control unit of the control assembly in the detection equipment controls the radio frequency module of the radio frequency signal generation assembly by using the SPI serial communication protocol to simulate the generated compass receiver directional signal and the received signal, and the signal is transmitted through the antenna (4); Thirdly, when the compass receiver receives the directional signal, the compass direction of the compass indicator, the multi-functional display and the flat display on the airplane points to the transmission direction of the directional signal; Fourthly, if the directional indication of the compass is unstable, the main control unit controls the radio frequency module to reduce the energy of the compass simulation signal, so as to weaken the reflection of the compass simulation signal in the hangar and reduce the interference on the compass direction; Finally, when the compass receiver receives the received signal modulated by the audio signal, a clear 1000Hz single tone sound can be heard in the earphone; (2) For the function detection of the directional instrument, step three is specifically: Firstly, the scene configuration for the function detection of the directional instrument is performed; the navigation signal output port of the detection equipment is connected with the antenna (4), and the detection equipment is placed 3 to 5 meters away from the directional instrument antenna; the detection equipment and the directional instrument are powered on, and the on-board earphone is connected; Secondly, the main control unit of the control component in the detection equipment controls the radio frequency module of the radio frequency signal generating component by using SPI serial communication protocol, analog generates the directional signal and the listening signal of the directional instrument, and the signals are transmitted through the antenna (4); Thirdly, when the directional instrument receives the directional signal, the directional instrument indicator, the multi-functional display and the flat display on the airplane point to the transmission direction of the directional signal; Finally, when the directional instrument receives the listening signal modulated by the audio signal, a clear 1000Hz single tone sound can be heard in the earphone; (3) For the beacon receiver function detection, step three is specifically: Firstly, the scene configuration of the beacon function is performed; the navigation signal output port of the detection equipment is connected with the antenna (4), and the detection equipment is placed below the airplane, and the antenna (4) is perpendicular to the airplane and is aligned with the beacon antenna; the detection equipment and the beacon are powered on, and the on-board earphone is connected; Secondly, the main control unit of the control component in the detection equipment controls the radio frequency module of the radio frequency signal generating component by using SPI serial communication protocol, analog generates three kinds of beacon signals of 3000Hz, 1300Hz and 400Hz, and according to the detection requirements, one kind of signal is selected and transmitted through the antenna (4); Finally, after the beacon receiver receives the beacon analog signal modulated by the audio signal, the corresponding far, medium and near station indicator lights are lit, and the corresponding audio prompt is given; (4) For the heading and glide receiver function detection, step three is specifically: Firstly, the scene configuration of the heading and glide receiver function detection is performed; the navigation signal output port of the detection equipment is connected with the antenna (4), and the detection equipment is placed 3 to 5 meters away from the heading and glide receiver antenna; the detection equipment and the heading and glide receiver are powered on, and the on-board earphone is connected; Secondly, the main control unit of the control component in the detection equipment controls the radio frequency module of the radio frequency signal generating component by using SPI serial communication protocol, analog generates the heading analog signal and the glide analog signal, and according to the detection requirements, the heading or glide signal is selected and transmitted through the antenna (4); wherein the analog generated heading analog signal includes the signals of left deviation, right deviation and center position, and the analog generated glide analog signal includes the signals of upward deviation, downward deviation and center position; Thirdly, the heading receiver receives the heading analog signal modulated by the audio signal with three components of 1020Hz, 90Hz and 150Hz, the angle of deviation from the center of the runway is measured by comparing the components of the two kinds of audio signals, and the display is displayed on the on-board heading indicator, the multi-functional display and the flat display, and the 1020Hz identification sound is heard in the earphone; Finally, the glide receiver receives the glide analog signal modulated by the audio signal with two components of 90Hz and 150Hz, the angle of deviation from the center of the runway is measured by comparing the components of the two kinds of audio signals, and the display is displayed on the on-board glide indicator, the multi-functional display and the flat display; Step four: the main control unit of the detection equipment which controls the display component can store 16 times of detection results for user inquiry, including the date of each detection, the model of the radio, the number, the filter number and various performance parameters and diagnosis results; Step five: connect the detection equipment with the computer through the USB data line, and import the detection result data stored in the detection equipment into the data recording software in the computer.

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