CN106093569B - Navigation signal measurement method, system and navigation equipment inline diagnosis method, system - Google Patents
Navigation signal measurement method, system and navigation equipment inline diagnosis method, system Download PDFInfo
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- CN106093569B CN106093569B CN201610379983.3A CN201610379983A CN106093569B CN 106093569 B CN106093569 B CN 106093569B CN 201610379983 A CN201610379983 A CN 201610379983A CN 106093569 B CN106093569 B CN 106093569B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R23/16—Spectrum analysis; Fourier analysis
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- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
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Abstract
The present invention provides a kind of navigation signal measurement method, carries out spectrum analysis to the navigation signal that navigation equipment issues using all phase Fast Fourier Transform (FFT) frequency spectrum analysis method first, obtains panoramic spectrum；Then the phase of 90Hz, 150Hz and 1020Hz signal is determined according to the panoramic spectrum；Spectrum analysis is carried out using part of the discrete Fourier transform frequency spectrum analysis method to the panoramic spectrum again, obtains zoom FFT；To determine the amplitude of 90Hz, 150Hz and 1020Hz signal according to the zoom FFT；Finally the navigation signal is measured according to the phase and amplitude of 90Hz, 150Hz and 1020Hz signal, obtains measurement result.The present invention, spectrum analysis is carried out using the method that all phase Fast Fourier Transform (FFT) frequency spectrum analysis method and discrete Fourier transform frequency spectrum analysis method combine, so as to eliminate or significantly weaken environmental factor to navigation signal interference, and then obtain accurate measurement result.
Description
Technical field
The present invention relates to airport navigation technical fields, and in particular to a kind of navigation signal measurement method and system, Yi Jiyi
Kind navigation equipment inline diagnosis method and system.
Background technique
In the work of airport navigation system, the work quality and navigation accuracy of navigation equipment, except depending on navigation equipment sheet
Body is with the presence or absence of outside failure, additionally depending on navigation surrounding enviroment, such as building, navigation equipment place, radio interference are a variety of
Factor influences.
Navigation equipment be using spacing wave realize aircraft guide, and spatial signal properties not only with navigation equipment itself
It is related, also influenced by platform location ambient enviroment.When there is object to be located within the protection zone of guidance station place, navigation can be reflected and set
Standby signal changes signal measurement environment.When navigation equipment measuring system within guidance station signal area protection zone to navigation
The navigation signal that equipment issues when measuring is influenced that measurement error can be generated by ambient environmental factors, is brought to measurement result
It is uncertain.
It is influenced by above-mentioned factor, the prior art cannot be according to navigation equipment measuring system to the measurement result pair of navigation signal
Navigation equipment carries out fault diagnosis, and man-made fault diagnosis, diagnostic result inaccuracy can only be rule of thumb carried out by staff.
Summary of the invention
For the defects in the prior art, the present invention provides a kind of navigation signal measurement method and system, to eliminate or subtract
Interference of the weak environmental factor to measurement enables navigation equipment test macro more accurately to believe the navigation that navigation equipment issues
It number measures, obtains more accurate measurement result；Meanwhile a kind of navigation equipment inline diagnosis method provided by the invention and
System may be implemented based on the accurate measurement result that above-mentioned navigation signal measurement method and system obtain to navigation equipment
Inline diagnosis, and accuracy with higher.
In a first aspect, a kind of navigation signal measurement method provided by the invention, comprising:
Frequency spectrum is carried out to the navigation signal that navigation equipment issues using all phase Fast Fourier Transform (FFT) frequency spectrum analysis method
Analysis obtains panoramic spectrum；
The phase of 90Hz, 150Hz and 1020Hz signal is determined according to the panoramic spectrum；
Spectrum analysis is carried out using part of the discrete Fourier transform frequency spectrum analysis method to the panoramic spectrum, is obtained thin
Change frequency spectrum；
The amplitude of 90Hz, 150Hz and 1020Hz signal is determined according to the zoom FFT；
The navigation signal is measured according to the phase and amplitude of 90Hz, 150Hz and 1020Hz signal, is obtained
Measurement result.
Optionally, the measurement result include 90Hz-150Hz percentage modulation difference in depth modulation and modulation depth and, and
The Morse code decoded by 1020Hz signal.
Optionally, described that the navigation that navigation equipment issues is believed using all phase Fast Fourier Transform (FFT) frequency spectrum analysis method
Number carry out spectrum analysis, obtain panoramic spectrum, comprising:
It is pre-processed using the navigation signal that all phase data preprocessing method issues navigation equipment；
Adding window Fast Fourier Transform (FFT) is carried out to pretreated data, obtains panoramic spectrum.
Second aspect, a kind of navigation signal measuring system provided by the invention, comprising:
All phase fast Fourier transform module, for using all phase Fast Fourier Transform (FFT) frequency spectrum analysis method to leading
The navigation signal that equipment of navigating issues carries out spectrum analysis, obtains panoramic spectrum；
Signal phase determining module, for determining the phase of 90Hz, 150Hz and 1020Hz signal according to the panoramic spectrum
Position；
Discrete Fourier transform module, for using discrete Fourier transform frequency spectrum analysis method to the panoramic spectrum
Part carries out spectrum analysis, obtains zoom FFT；
Signal amplitude determining module, for determining the width of 90Hz, 150Hz and 1020Hz signal according to the zoom FFT
Value；
Signal measurement module, for according to the phase and amplitude of 90Hz, 150Hz and 1020Hz signal to the navigation
Signal measures, and obtains measurement result.
Optionally, all phase fast Fourier transform module, comprising:
All phase pretreatment unit, the navigation signal for being issued using all phase data preprocessing method to navigation equipment
It is pre-processed；
Adding window Fast Fourier Transform (FFT) unit is obtained for carrying out adding window Fast Fourier Transform (FFT) to pretreated data
Obtain panoramic spectrum.
The third aspect, a kind of navigation equipment inline diagnosis method provided by the invention, comprising:
It is measured using the navigation signal that the navigation signal measurement method provided by the invention issues navigation equipment,
To eliminate or weaken interference of the environmental factor to measurement, measurement result is obtained；
The first navigational structure figure is drawn according to the measurement result；
Theoretic second navigational structure figure is drawn according to the device model of the navigation equipment；
Judge whether the structure trend of the first navigational structure figure and the second navigational structure figure is close；
If not close, judge that the navigation equipment breaks down.
It is optionally, described that theoretic second navigational structure figure is drawn according to the device model of the navigation equipment, comprising:
According to the device model of the navigation equipment, navigation signal directional diagram is drawn using moment method；
The case where according to landform and barrier around the navigation equipment, using physical optics method according to the navigation
Sense figure draws theoretic second navigational structure figure.
It is optionally, described that theoretic second navigational structure figure is drawn according to the device model of the navigation equipment, comprising:
According to active radiation event near the device model of the navigation equipment and guidance station location, in conjunction with electromagnetic propagation theory
Draw theoretic second navigational structure figure.
Optionally, the navigation equipment inline diagnosis method, further includes:
If the structure trend of the first navigational structure figure and the second navigational structure figure is close, according to drafting
The method for drafting that second navigational structure figure uses judges the factor that interference is generated to the propagation of the navigation signal.
Fourth aspect, a kind of navigation equipment in-circuit diagnostic system provided by the invention, comprising:
Navigation signal measurement module, for being sent out using the navigation signal measurement method provided by the invention navigation equipment
Navigation signal out measures, and to eliminate or weaken interference of the environmental factor to measurement, obtains measurement result；
First navigational structure figure drafting module, for drawing the first navigational structure figure according to the measurement result；
Second navigational structure figure drafting module, for drawing theoretic second according to the device model of the navigation equipment
Navigational structure figure；
Navigational structure figure comparison module, for judging the knot of the first navigational structure figure and the second navigational structure figure
Whether structure trend is close；
Navigate fault determination module, if judging that the navigation equipment breaks down for not close.
As shown from the above technical solution, a kind of navigation signal measurement method provided by the invention, it is fast using all phase first
Fast Fourier transformation frequency spectrum analysis method carries out spectrum analysis to the navigation signal that navigation equipment issues, and obtains panoramic spectrum；So
The phase of 90Hz, 150Hz and 1020Hz signal is determined according to the panoramic spectrum afterwards；Again using discrete Fourier transform frequency spectrum point
Analysis method carries out spectrum analysis to the part of the panoramic spectrum, obtains zoom FFT；To be determined according to the zoom FFT
The amplitude of 90Hz, 150Hz and 1020Hz signal；Finally according to the phase and amplitude pair of 90Hz, 150Hz and 1020Hz signal
The navigation signal measures, and obtains measurement result.The present invention uses all phase Fast Fourier Transform (FFT) spectrum analysis side
The method that method and discrete Fourier transform frequency spectrum analysis method combine carries out spectrum analysis, so as to eliminate or significantly subtract
Interference of the weak environmental factor to navigation signal, and then obtain accurate measurement result.
In addition, the present invention also provides a kind of navigation equipment inline diagnosis method, described led using provided by the invention first
The navigation signal that boat signal measurement method issues navigation equipment measures, and is done with eliminating or weakening environmental factor to measurement
It disturbs, obtains measurement result；Then the first navigational structure figure is drawn according to the measurement result；Further according to setting for the navigation equipment
Standby model draws theoretic second navigational structure figure；Next, it is judged that the first navigational structure figure and second navigation
Whether the structure trend of structure chart is close；If not close, judge that the navigation equipment breaks down.The present invention, based on above-mentioned
Navigation signal measurement method, using the above-mentioned accurate measurement result of navigation signal measurement method, by drawing navigational structure figure simultaneously
Be compared with theoretic navigational structure figure, inline diagnosis to navigation equipment can be realized according to comparison result, have compared with
High accuracy.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar element
Or part is generally identified by similar appended drawing reference.In attached drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 shows a kind of flow chart of navigation signal measurement method provided by first embodiment of the invention；
Fig. 2 shows a kind of structural schematic diagrams of navigation signal measuring system provided by second embodiment of the invention；
Fig. 3 shows a kind of flow chart of navigation equipment inline diagnosis method provided by third embodiment of the invention；
Fig. 4 shows a kind of structural representation of navigation equipment in-circuit diagnostic system provided by fourth embodiment of the invention
Figure；
Fig. 5 shows a kind of flow chart of all phase Fast Fourier Transform (FFT) spectrum analysis provided by the invention.
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solution of the present invention.Following embodiment is only used for
Clearly illustrate technical solution of the present invention, therefore be intended only as example, and cannot be used as a limitation and limit protection of the invention
Range.
It should be noted that unless otherwise indicated, technical term or scientific term used in this application should be this hair
The ordinary meaning that bright one of ordinary skill in the art are understood.
The application provides a kind of navigation signal measurement method and system and a kind of navigation equipment inline diagnosis method and is
System.The embodiment of the present invention is illustrated with reference to the accompanying drawing.
Fig. 1 shows a kind of flow chart of navigation signal measurement method provided by first embodiment of the invention.Such as Fig. 1 institute
Show, first embodiment of the invention provide a kind of navigation signal measurement method the following steps are included:
Step S101: the navigation signal that navigation equipment is issued using all phase Fast Fourier Transform (FFT) frequency spectrum analysis method
Spectrum analysis is carried out, panoramic spectrum is obtained.
In this step, different length or continuous two sections of FFT can be carried out by the navigation signal issued to navigation equipment
(Fast Fourier Transformation, Fast Fourier Transform (FFT)) obtains FFT panoramic spectrum, accurate to correct to obtain
Phase.
Due to navigation signal carry out discrete spectrum analysis when, whether frequency, amplitude and phase generally all there may be
Error.This error can be eliminated or significantly be reduced to All-phase FFT spectrum analysis, to improve analysis precision.
All-phase FFT spectrum analysis mainly includes two parts of all phase data prediction and windowing FFT, such as N=3
When, the flow chart of whole phase FFT frequency spectrum point is as shown in Figure 5.
When it is N that FFT, which calculates points, data length to be treated should be (2N-1).According to linear TIME SHIFT INVARIANCE system
The principle of stacking of system, the superposition for the response that all list entries generate, which should be equal to, to be superimposed all list entries and deactivates
The response generated after system.All phase data prediction utilizes the property, is the data sequence of (2N-1) to input system length
Column realize the segmentation for being N to all length comprising input sample x (n) using first periodic extension, the method summed and be truncated again
The whole of situation consider.
This method has phase ergodic due to considering all data sectional situations, to weaken waveform
Head and the tail amplitude jump, so that signal performance is improved.It is calculated by the pretreated data of all phase, then through traditional windowing FFT,
Entire All-phase FFT spectrum analysis process, the phase spectrum from the panoramic spectrum that All-phase FFT spectrum analysis obtains can be completed
In can accurately learn the phases of the signals such as 90Hz/150Hz/1020Hz.
It is described to use all phase Fast Fourier Transform (FFT) frequency spectrum analysis method pair in one embodiment provided by the invention
The navigation signal that navigation equipment issues carries out spectrum analysis, obtains panoramic spectrum, comprising:
It is pre-processed using the navigation signal that all phase data preprocessing method issues navigation equipment；
Adding window Fast Fourier Transform (FFT) is carried out to pretreated data, obtains panoramic spectrum.
Step S102: the phase of 90Hz, 150Hz and 1020Hz signal is determined according to the panoramic spectrum.
Step S103: frequency spectrum point is carried out using part of the discrete Fourier transform frequency spectrum analysis method to the panoramic spectrum
Analysis obtains zoom FFT.
For the panoramic spectrum that step S101 is generated, DFT (Discrete can be used again continuing with the part to be refined
Fourier Transform, discrete Fourier transform) operation is carried out, to obtain the high frequency spectrum of local refinement precision, then again
Correct frequency and amplitude, adaptable good, the higher advantage of precision.
When it is implemented, can be first by the integrated change summation of continuous fourier transform, time domain discrete and time domain truncation
To there is three steps of limit for length to transform to time discrete, frequency continuously special Fourier transformation form:
In formula,For a single tone signal sequence, frequency, amplitude and initial phase point
It Wei not f0、A0And θ0,For by frequency resolution Δ f=fsThe normalized frequency of/N normalizing.N is FFT points, fs
For sample frequency.
Then to a specified frequency separation [f1,f2] refine, set refinement multiple as D, then refinement after frequency discrimination
Rate is
Δ f'=Δ f/D (formula 2)
The calculating frequency sequence of refinement is to known to
{f1,f1+Δf',f1+2Δf',...,f2(formula 3)
The amplitude spectrum and phase spectrum that frequency sequence is calculated needed for finally being acquired with above-mentioned formula 1, in each thinning spectral line
Frequency values corresponding to search Amplitude maxima point are the estimation frequency of harmonic signal.Again in estimation frequency search and 90Hz/
Frequency similar in 150Hz/1020Hz etc., in conjunction with the phase spectrum of the whole phase FFT of front, to obtain corresponding amplitude.
Step S104: the amplitude of 90Hz, 150Hz and 1020Hz signal is determined according to the zoom FFT.
Step S105: the navigation signal is carried out according to the phase and amplitude of 90Hz, 150Hz and 1020Hz signal
Measurement obtains measurement result.
In one embodiment provided by the invention, the measurement result includes that the percentage modulation modulation of 90Hz-150Hz is deep
Spend poor (DDM, Difference in Depth of Modulation) and modulation depth and (SDM, Sum of the Depths
Of Modulation), and the Morse code decoded by 1020Hz signal.
So far, by step S101 to step S105, a kind of navigation letter provided by first embodiment of the invention is completed
The process of number measurement method.The present invention, uses all phase Fast Fourier Transform (FFT) frequency spectrum analysis method and discrete fourier becomes
It changes the method that frequency spectrum analysis method combines and carries out spectrum analysis, so as to eliminate or significantly weaken environmental factor to navigation
The interference of signal, and then obtain accurate measurement result.
In above-mentioned first embodiment, a kind of navigation signal measurement method is provided, corresponding, the application is also
A kind of navigation signal measuring system is provided.Referring to FIG. 2, it is measured for a kind of navigation signal that second embodiment of the invention provides
The structural schematic diagram of system.Since system embodiment is substantially similar to embodiment of the method, so describe fairly simple, correlation
Place illustrates referring to the part of embodiment of the method.System embodiment described below is only schematical.
A kind of navigation signal measuring system that second embodiment of the invention provides, comprising:
All phase fast Fourier transform module 101, for using all phase Fast Fourier Transform (FFT) frequency spectrum analysis method
Spectrum analysis is carried out to the navigation signal that navigation equipment issues, obtains panoramic spectrum；
Signal phase determining module 102, for determining 90Hz, 150Hz and 1020Hz signal according to the panoramic spectrum
Phase；
Discrete Fourier transform module 103, for using discrete Fourier transform frequency spectrum analysis method to the panorama frequency
The part of spectrum carries out spectrum analysis, obtains zoom FFT；
Signal amplitude determining module 104, for determining 90Hz, 150Hz and 1020Hz signal according to the zoom FFT
Amplitude；
Signal measurement module 105, for according to the phase and amplitude of 90Hz, 150Hz and 1020Hz signal to described
Navigation signal measures, and obtains measurement result.
In one embodiment provided by the invention, all phase fast Fourier transform module 101, comprising:
All phase pretreatment unit, the navigation signal for being issued using all phase data preprocessing method to navigation equipment
It is pre-processed；
Adding window Fast Fourier Transform (FFT) unit is obtained for carrying out adding window Fast Fourier Transform (FFT) to pretreated data
Obtain panoramic spectrum.
More than, for a kind of embodiment explanation for navigation signal measuring system that second embodiment of the invention provides.
A kind of navigation signal measuring system provided by the invention and above-mentioned navigation signal measurement method are for identical invention
Design, beneficial effect having the same, details are not described herein again.
The present invention also provides a kind of navigation equipment inline diagnosis method, this method is based on above-mentioned navigation signal measurement method
And implement, related content please refers to the explanation of above-mentioned first embodiment part, and partial content repeats no more.
Referring to FIG. 3, it is a kind of process of navigation equipment inline diagnosis method provided by third embodiment of the invention
Figure, the 3rd embodiment provide a kind of navigation equipment inline diagnosis method the following steps are included:
Step S201: the navigation signal that navigation equipment is issued using the navigation signal measurement method provided by the invention
It measures, to eliminate or weaken interference of the environmental factor to measurement, obtains measurement result.
The specific steps of this part please refer to the explanation of above-mentioned first embodiment part, and details are not described herein again.
Step S202: the first navigational structure figure is drawn according to the measurement result.
Step S203: theoretic second navigational structure figure is drawn according to the device model of the navigation equipment.
It is described theoretic according to the drafting of the device model of the navigation equipment in one embodiment provided by the invention
Second navigational structure figure, comprising:
According to the device model of the navigation equipment, navigation signal directional diagram is drawn using moment method；
The case where according to landform and barrier around the navigation equipment, using physical optics method according to the navigation
Sense figure draws theoretic second navigational structure figure.
It is described to be drawn theoretically according to the device model of the navigation equipment in another embodiment provided by the invention
The second navigational structure figure, comprising:
According to active radiation event near the device model of the navigation equipment and guidance station location, in conjunction with electromagnetic propagation theory
Draw theoretic second navigational structure figure.
Above-mentioned two embodiment that this step provides has carried out exemplary illustration to the method for drawing the second navigational structure figure,
Wherein, one is the second navigational structure figure is drawn by moment method and physical optics method, it is mainly used for according to navigation equipment week
The landform and barrier situation enclosed judge navigation equipment whether failure；Another kind is that the second navigation is drawn by electromagnetic propagation theory
Structure chart, the active radiation event being mainly used for around according to navigation equipment judge navigation equipment whether failure；Two ways can
Individually to implement, it can also be combined with each other comprehensive implementation, it is within the scope of the present invention.
Step S204: judge the first navigational structure figure and the second navigational structure figure structure trend whether phase
Closely.
Step S205: if not close, judge that the navigation equipment breaks down.
So far, it by step S201 to step S205, completes a kind of navigate provided by third embodiment of the invention and sets
The process of standby inline diagnosis method.This method is based on above-mentioned navigation signal measurement method, utilizes above-mentioned navigation signal measurement method
Accurate measurement result navigational structure figure and is compared by drawing with theoretic navigational structure figure, can be according to comparing
As a result the inline diagnosis to navigation equipment, accuracy with higher are realized.
It should be noted that the navigation equipment inline diagnosis method provided in an embodiment of the present invention can be not only used for pair
Navigation equipment carries out fault diagnosis, can also judge that the propagation to the navigation signal is generated according to the judging result of step S204
The factor of interference.In one embodiment provided by the invention, after step S204, further includes:
If the structure trend of the first navigational structure figure and the second navigational structure figure is close, according to drafting
The method for drafting that second navigational structure figure uses judges the factor that interference is generated to the propagation of the navigation signal.
For example, if drawing method for drafting that the second navigational structure figure uses as by moment method and physical optics method
The second navigational structure figure is drawn, then, if the structure trend phase of the first navigational structure figure and the second navigational structure figure
Closely, then the propagation of the navigation signal can be had an impact by illustrating that navigation signal space caused by the environment of guidance station location changes；If
Draw the method for drafting that the second navigational structure figure uses for by electromagnetic propagation theory draw the second navigational structure figure, that
, if the structure trend of the first navigational structure figure and the second navigational structure figure is close, illustrate near guidance station location
Active radiation-induced navigation signal space changes and can have an impact to the propagation of the navigation signal.Sentence based on above-mentioned analysis
It is disconnected, it can establish equipment state diagnosis, be the preventative and corrective maintenance of navigation equipment, reference frame is provided.
Around navigation table of equipment location the case where active or sourceless seism, analysis in airfield runway and around measure
Whether measurement data (such as modulation degree depth difference DDM value) is close with the structure trend of navigation channel structure chart that simulation is drawn, such as not phase
Closely, then it can determine that navigation equipment breaks down.
In above-mentioned 3rd embodiment, a kind of navigation equipment inline diagnosis method, corresponding, this Shen are provided
A kind of navigation equipment in-circuit diagnostic system is please also provided.Referring to FIG. 4, it is a kind of navigation that fourth embodiment of the invention provides
The structural schematic diagram of equipment on-line diagnostic system.Since system embodiment is substantially similar to embodiment of the method, so describing to obtain ratio
Relatively simple, the relevent part can refer to the partial explaination of embodiments of method.System embodiment described below is only schematic
's.
A kind of navigation equipment in-circuit diagnostic system that fourth embodiment of the invention provides, comprising:
Navigation signal measurement module 201, for being set using the navigation signal measurement method provided by the invention to navigation
The navigation signal that preparation goes out measures, and to eliminate or weaken interference of the environmental factor to measurement, obtains measurement result；
First navigational structure figure drafting module 202, for drawing the first navigational structure figure according to the measurement result；
Second navigational structure figure drafting module 203, it is theoretic for being drawn according to the device model of the navigation equipment
Second navigational structure figure；
Navigational structure figure comparison module 204, for judging the first navigational structure figure and the second navigational structure figure
Structure trend it is whether close；
Navigate fault determination module 205, if judging that the navigation equipment breaks down for not close.
In one embodiment provided by the present application, the second navigational structure figure drafting module 203, comprising:
Navigation signal directional diagram drawing unit is drawn for the device model according to the navigation equipment using moment method
Navigation signal directional diagram；
Passive navigation structure chart drawing unit, the case where for according to landform and barrier around the navigation equipment,
Theoretic second navigational structure figure is drawn according to the navigation signal directional diagram using physical optics method.
In one embodiment provided by the present application, the second navigational structure figure drafting module 203, comprising:
Active navigational structure figure drawing unit, for nearby being had according to the device model of the navigation equipment and guidance station location
Source radiation situation draws theoretic second navigational structure figure in conjunction with electromagnetic propagation theory.
In one embodiment provided by the present application, the navigation equipment in-circuit diagnostic system, further includes:
Interference factor analysis module, if the structure for the first navigational structure figure and the second navigational structure figure becomes
Gesture is close, then the method for drafting used according to the second navigational structure figure is drawn, judges that the propagation to the navigation signal produces
The factor of raw interference.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
It should be noted that the flow chart and block diagram in the drawings show the system of multiple embodiments according to the present invention,
The architecture, function and operation in the cards of method and computer program product.In this regard, in flowchart or block diagram
Each box can represent a part of a module, section or code, a part packet of the module, section or code
Containing one or more executable instructions for implementing the specified logical function.It should also be noted that in some realities as replacement
In existing, function marked in the box can also occur in a different order than that indicated in the drawings.For example, two continuous sides
Frame can actually be basically executed in parallel, they can also be executed in the opposite order sometimes, this according to related function and
It is fixed.It is also noted that the group of each box in block diagram and or flow chart and the box in block diagram and or flow chart
It closes, can be realized with the dedicated hardware based system for executing defined function or movement, or specialized hardware can be used
Combination with computer instruction is realized.
Navigation signal measuring system and navigation equipment in-circuit diagnostic system provided by the embodiment of the present invention can be calculating
Machine program product, the computer readable storage medium including storing program code, the instruction that said program code includes are available
In executing previous methods method as described in the examples, specific implementation can be found in embodiment of the method, and details are not described herein.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can be with
It realizes by another way.The apparatus embodiments described above are merely exemplary, for example, the division of the unit,
Only a kind of logical function partition, there may be another division manner in actual implementation, in another example, multiple units or components can
To combine or be desirably integrated into another system, or some features can be ignored or not executed.Another point, it is shown or beg for
The mutual coupling, direct-coupling or communication connection of opinion can be through some communication interfaces, device or unit it is indirect
Coupling or communication connection can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic or disk.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme should all cover within the scope of the claims and the description of the invention.
Claims (5)
1. a kind of navigation equipment inline diagnosis method characterized by comprising
It is measured using the navigation signal that navigation signal measurement method issues navigation equipment, the navigation signal measurement method
It specifically includes: frequency spectrum is carried out to the navigation signal that navigation equipment issues using all phase Fast Fourier Transform (FFT) frequency spectrum analysis method
Analysis obtains panoramic spectrum；
The phase of 90Hz, 150Hz and 1020Hz signal is determined according to the panoramic spectrum；
Spectrum analysis is carried out using part of the discrete Fourier transform frequency spectrum analysis method to the panoramic spectrum, obtains refinement frequency
Spectrum；
The amplitude of 90Hz, 150Hz and 1020Hz signal is determined according to the zoom FFT；
The navigation signal is measured according to the phase and amplitude of 90Hz, 150Hz and 1020Hz signal, with eliminate or
Weaken interference of the environmental factor to measurement, obtains measurement result；
The first navigational structure figure is drawn according to the measurement result；
Theoretic second navigational structure figure is drawn according to the device model of the navigation equipment；
Judge whether the structure trend of the first navigational structure figure and the second navigational structure figure is close；
If not close, judge that the navigation equipment breaks down.
2. navigation equipment inline diagnosis method according to claim 1, which is characterized in that described according to the navigation equipment
Device model draw theoretic second navigational structure figure, comprising:
According to the device model of the navigation equipment, navigation signal directional diagram is drawn using moment method；
The case where according to landform and barrier around the navigation equipment, using physical optics method according to the navigation signal
Directional diagram draws theoretic second navigational structure figure.
3. navigation equipment inline diagnosis method according to claim 1, which is characterized in that described according to the navigation equipment
Device model draw theoretic second navigational structure figure, comprising:
According to active radiation event near the device model of the navigation equipment and guidance station location, drawn in conjunction with electromagnetic propagation theory
Theoretic second navigational structure figure.
4. navigation equipment inline diagnosis method according to claim 1, which is characterized in that further include:
If the structure trend of the first navigational structure figure and the second navigational structure figure is close, according to drafting described second
The method for drafting that navigational structure figure uses judges the factor that interference is generated to the propagation of the navigation signal.
5. a kind of navigation equipment in-circuit diagnostic system characterized by comprising
Navigation signal measurement module, the navigation signal for being issued using navigation signal measurement method to navigation equipment are surveyed
Amount, the navigation signal measurement method specifically include: being set using all phase Fast Fourier Transform (FFT) frequency spectrum analysis method to navigation
The navigation signal that preparation goes out carries out spectrum analysis, obtains panoramic spectrum；
The phase of 90Hz, 150Hz and 1020Hz signal is determined according to the panoramic spectrum；
Spectrum analysis is carried out using part of the discrete Fourier transform frequency spectrum analysis method to the panoramic spectrum, obtains refinement frequency
Spectrum；
The amplitude of 90Hz, 150Hz and 1020Hz signal is determined according to the zoom FFT；
The navigation signal is measured according to the phase and amplitude of 90Hz, 150Hz and 1020Hz signal, with eliminate or
Weaken interference of the environmental factor to measurement, obtains measurement result；
First navigational structure figure drafting module, for drawing the first navigational structure figure according to the measurement result；
Second navigational structure figure drafting module, for drawing theoretic second navigation according to the device model of the navigation equipment
Structure chart；
Navigational structure figure comparison module, for judging that the first navigational structure figure and the structure of the second navigational structure figure become
Whether gesture is close；
Navigate fault determination module, if judging that the navigation equipment breaks down for not close.
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| CN109703787A (en) * | 2018-12-11 | 2019-05-03 | 上海航天控制技术研究所 | A kind of method for diagnosing faults of near-earth satellite three axis magnetometer data validity |
| CN110376497B (en) * | 2019-08-12 | 2022-05-13 | 国网四川电力服务有限公司 | Low-voltage distribution system series fault electric arc identification method based on full-phase deep learning |
| CN112083444B (en) * | 2020-08-19 | 2021-06-08 | 中国民用航空总局第二研究所 | Low-latitude airport ionosphere short-time prediction method considering plasma bubbles |
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