CN106226630A - A kind of railway system low-frequency AC magnetic fields test system - Google Patents
A kind of railway system low-frequency AC magnetic fields test system Download PDFInfo
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- CN106226630A CN106226630A CN201610778671.XA CN201610778671A CN106226630A CN 106226630 A CN106226630 A CN 106226630A CN 201610778671 A CN201610778671 A CN 201610778671A CN 106226630 A CN106226630 A CN 106226630A
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- 238000012360 testing method Methods 0.000 title claims abstract description 26
- 238000004458 analytical method Methods 0.000 claims abstract description 84
- 230000005670 electromagnetic radiation Effects 0.000 claims abstract description 50
- 239000000523 sample Substances 0.000 claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 30
- 238000012545 processing Methods 0.000 claims abstract description 23
- 230000003321 amplification Effects 0.000 claims abstract description 20
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 20
- 238000013500 data storage Methods 0.000 claims description 17
- 238000005070 sampling Methods 0.000 claims description 13
- 230000010354 integration Effects 0.000 claims description 10
- 230000005855 radiation Effects 0.000 claims description 6
- 206010000060 Abdominal distension Diseases 0.000 claims description 2
- 238000001228 spectrum Methods 0.000 claims description 2
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- 238000005259 measurement Methods 0.000 abstract description 6
- 238000011161 development Methods 0.000 description 2
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- 238000010183 spectrum analysis Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
- G01R29/0814—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0892—Details related to signal analysis or treatment; presenting results, e.g. displays; measuring specific signal features other than field strength, e.g. polarisation, field modes, phase, envelope, maximum value
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Abstract
The invention provides a kind of railway system low-frequency AC magnetic fields test system, including three-axle magnetic field probe, amplification module, signal conversion module and signal processing module；Wherein, described three-axle magnetic field probe, described amplification module, described signal conversion module, described signal processing module be sequentially connected；Described signal processing module carries out time-domain analysis and frequency-domain analysis for the ELECTROMAGNETIC RADIATION SIGNATURE that described three-axle magnetic field probe records three directions, it is additionally operable to calculate the vector of the ELECTROMAGNETIC RADIATION SIGNATURE in described three directions, and vector is carried out time-domain analysis and frequency-domain analysis；Railway system's low-frequency AC magnetic fields test system of offer of the present invention can realize the measurement of each frequency virtual value in tri-directions of X, Y, Z to low-frequency AC magnetic fields, and calculate its vector, measurement result and vector are carried out time-domain analysis and frequency-domain analysis simultaneously.
Description
Technical field
The present invention relates to electromagnetic compatibility test field, particularly to a kind of railway system low-frequency AC magnetic fields test system.
Background technology
China Railway Transportation is in the period developed rapidly, and is mainly manifested in two aspects: one is the electrification of traction,
Two is microelectronics and the computerization of equipment.Microelectric technique and computer technology are applied to railway signaling control and monitoring system
Become the development trend of modernized railway transport.
Along with the development of railway electrification, people are for electromagnetic radiation produced by electronics in the railway system and electrical equipment
Interference also begins to gradually pay attention to.But China at present for electronics in Railway Environment and electrical equipment for the electromagnetic interference of human body
Assay method and related system, also in the state of blank out, therefore, urgent need is a set of now can be produced the railway system
Low-frequency AC magnetic fields carries out the system tested.
Summary of the invention
It is an object of the invention to overcome prior art not enough, it is provided that low-frequency AC magnetic fields test system of a kind of railway system
System, can measure the three of low-frequency AC magnetic fields direction magnetic field intensity, and calculate its vector, and to the data recorded
Carry out time-domain analysis and frequency-domain analysis, and can carry out preserving and carrying out off-line analysis by test data.
The present invention uses following technical scheme for achieving the above object:
A kind of railway system low-frequency AC magnetic fields test system, including three-axle magnetic field probe, amplification module, signal modulus of conversion
Block and signal processing module；
Wherein, described three-axle magnetic field probe, described amplification module, described signal conversion module, described signal processing mould
Being sequentially connected of block；
Described three-axle magnetic field probe is for measuring the first ELECTROMAGNETIC RADIATION SIGNATURE, the second ELECTROMAGNETIC RADIATION SIGNATURE and the 3rd electromagnetism spoke
Penetrate signal, and by described first ELECTROMAGNETIC RADIATION SIGNATURE recorded, described second ELECTROMAGNETIC RADIATION SIGNATURE and described 3rd electromagnetic radiation
Signal is separately sent to described amplification module；
Described amplification module for described first ELECTROMAGNETIC RADIATION SIGNATURE received, described second ELECTROMAGNETIC RADIATION SIGNATURE and
Described 3rd ELECTROMAGNETIC RADIATION SIGNATURE be amplified process, and will amplify after described first ELECTROMAGNETIC RADIATION SIGNATURE, described second electricity
Magnetic radiation signal and described 3rd ELECTROMAGNETIC RADIATION SIGNATURE are sent to described signal conversion module；
Described signal conversion module is for by described first ELECTROMAGNETIC RADIATION SIGNATURE received, described second electromagnetic radiation letter
Number and described 3rd ELECTROMAGNETIC RADIATION SIGNATURE in be converted into the first digital signal, the second digital signal and the 3rd digital signal, and
According to described parameter preset by the one in described first digital signal, described second digital signal and described 3rd digital signal
Or multiple it is sent to described signal processing module；
Described signal processing module is for described first digital signal received, described second digital signal and described the
One or more of three digital signals, and carry out time-domain analysis and frequency-domain analysis according to the parameter preset signal to receiving, and
Show its analysis result；
Described signal processing module be additionally operable to calculate described first digital signal received, described second digital signal and
Its vector of described 3rd digital signal, and according to described parameter preset, described vector signal carried out time-domain analysis and frequency
Domain analysis, and show its analysis result；
Wherein, described first ELECTROMAGNETIC RADIATION SIGNATURE, described second ELECTROMAGNETIC RADIATION SIGNATURE and described 3rd ELECTROMAGNETIC RADIATION SIGNATURE
It is respectively the X-direction radiation signal in magnetic field, Y direction radiation signal and Z-direction radiation signal, described X-axis, Y-axis, Z axis
Doing conventional understanding, described X-axis, Y-axis, Z axis are the most orthogonal.
In an embodiment of the present invention, described three-axle magnetic field probe includes three outfans, and described amplification module includes three
Individual input and three outfans, described signal conversion module includes outfan and three inputs；
Three inputs of three outfans and the described amplification module of described three-axle magnetic field probe are respectively connected with, described in put
Big three outfans of module are respectively connected with three inputs of described signal conversion module, described signal conversion module defeated
Go out end to be connected with described signal analysis module；
Three outfans of described three-axle magnetic field probe be respectively used to export described first ELECTROMAGNETIC RADIATION SIGNATURE, described second
ELECTROMAGNETIC RADIATION SIGNATURE and described 3rd ELECTROMAGNETIC RADIATION SIGNATURE.
In an embodiment of the present invention, described signal processing module includes time-domain analysis module, display module；
Wherein, one end of described time-domain analysis module is connected with described signal conversion module, described time-domain analysis module
The other end is connected with described display module；
Described time-domain analysis module is for according to the parameter preset described first digital signal to receiving, described second number
In word signal and described 3rd digital signal one or more be filtered, integration sampling, and raw according to described sampled result
Become time domain specification curve, and by the time domain specification curve of described first digital signal, the time domain specification of described second digital signal
One or more in the time domain specification curve of curve and described 3rd digital signal are sent to described display module；
Described first digital signal, described second digital signal and the institute that described time-domain analysis module also receives with calculating
State the vector of the 3rd digital signal, and according to parameter preset, described vector is filtered, integration sampling, and when generating
Territory characteristic curve, and the time domain specification curve of described vector is sent described display module；
Described display module is for showing the time domain specification curve of described first digital signal, described second digital signal
One in time domain specification curve, the described time domain specification curve of the 3rd digital signal, the time domain specification curve of described vector
Or it is multiple.
In an embodiment of the present invention, described signal processing module includes frequency-domain analysis module, display module；
Wherein, one end of described frequency-domain analysis module is connected with described signal conversion module, described frequency-domain analysis module
The other end is connected with described display module；
Described frequency-domain analysis module is for according to the parameter preset described first digital signal to receiving, described second number
In word signal and described 3rd digital signal, one or more carry out fast Fourier transform, and become according to described fast Fourier
The result changed generates frequency domain characteristic curve, and by the frequency domain characteristic curve of described first digital signal, described second digital signal
Frequency domain characteristic curve, described 3rd digital signal frequency domain characteristic curve in one or more be sent to described display mould
Block；
Described first digital signal, described second digital signal and the institute that described frequency-domain analysis module also receives with calculating
State the vector of the 3rd digital signal, and according to parameter preset, described vector carried out fast Fourier transform, and according to institute
The result stating fast Fourier transform generates frequency domain characteristic curve, and is sent by the frequency domain characteristic curve of described vector described
Display module；
Described display module is for showing the frequency domain characteristic curve of described first digital signal, described second digital signal
One in frequency domain characteristic curve, the described frequency domain characteristic curve of the 3rd digital signal, the frequency domain characteristic curve of described vector
Or it is multiple.
In an embodiment of the present invention, described frequency-domain analysis module is additionally operable to the frequency domain characteristic of described first digital signal
Curve, the frequency domain characteristic curve of described second digital signal, the frequency domain characteristic curve of described 3rd digital signal, described vector
Frequency domain characteristic curve in the maximum amplitude of one or more be sent to described display module, described display module is additionally operable to show
Show described maximum amplitude.
In an embodiment of the present invention, described display module also prestores limit graph；Described display module is additionally operable to
Show the frequency domain characteristic curve of described first digital signal, the frequency domain characteristic curve of described second digital signal, described 3rd number
The frequency domain characteristic curve of word signal, described vector frequency domain characteristic curve time, show described limit graph simultaneously.
In an embodiment of the present invention, described signal processing module also includes that waveform preserves module；
Wherein, described waveform preservation module is connected with shown display module；Described waveform preserves module and is used for preserving described
The curve that display module shows.
In an embodiment of the present invention, described railway system low-frequency AC magnetic fields test system also includes that data preserve mould
Block；
Wherein, described data storage module is connected with described signal conversion module；Described data storage module is used for preserving
Described first digital signal, described second digital signal and described 3rd digital signal of described signal conversion module output.
In an embodiment of the present invention, described signal processing module is also connected with described data storage module；Described signal
Processing module be additionally operable to read in described data storage module described first digital signal of storage, described second digital signal and
One or more in described 3rd digital signal.
In an embodiment of the present invention, described parameter preset includes channel parameters, sample frequency, hits, sampling configuration,
Window length, window function type, one or more of the time of integration and spectrum analysis band alleviating distention in middle-JIAO.
In an embodiment of the present invention, the sectional area of each single shaft of described three-axle magnetic field probe is not more than 100 squares lis
Rice.
In an embodiment of the present invention, the response frequency of described three-axle magnetic field probe is more than 20kHz.
Beneficial effects of the present invention:
One, it is possible to achieve the measurement to each frequency virtual value in tri-directions of X, Y, Z of low-frequency AC magnetic fields, and count
Calculate its vector；
Its two, measurement result can be carried out time-domain analysis and frequency-domain analysis simultaneously, meet various standard-required and measurement
Need；
They are three years old, it is possible to achieve the omnidistance record of measurement data, and realize the off-line analysis to record data, to solve test
The problem that on-the-spot inconvenience carries out data analysis.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of railway system low-frequency AC magnetic fields test system in one embodiment of the invention；
Fig. 2 is the structural representation of the signal analysis module in one embodiment of the invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings and specific embodiment the present invention will be further described, illustrative examples therein and
Illustrate only to be used for explaining the present invention, but not as a limitation of the invention.
In an embodiment of the present invention, as it is shown in figure 1, the invention provides the low-frequency AC magnetic fields test of a kind of railway system
System, including three-axle magnetic field probe 100, amplification module 200, signal modulus of conversion 300, signal processing module 400 and data preserve
Module 500；
Wherein, three-axle magnetic field probe 100 includes three outfans, amplification module 200 include three inputs and three defeated
Going out end, signal conversion module 300 includes outfan and three inputs；
Three outfans of three-axle magnetic field probe 100 are connected with three inputs of amplification module 200, amplification module 200
Three outfans be connected with three inputs of signal conversion module 300, at the outfan of signal conversion module 300 and signal
Reason module 400 and data storage module 500 are connected；
Three-axle magnetic field probe 100 is for measuring the electromagnetism of X-direction, Y direction and Z-direction in low-frequency AC magnetic fields
Radiation signal；And be respectively outputted in amplification module 200 by three outfans, the amplification module 200 X-axis side to receiving
ELECTROMAGNETIC RADIATION SIGNATURE to, Y direction and Z-direction is amplified, and X-direction, Y direction and the Z axis side after amplifying
To ELECTROMAGNETIC RADIATION SIGNATURE be sent to signal conversion module 300；Signal conversion module 300 is by the X-direction received, Y-axis side
To and the ELECTROMAGNETIC RADIATION SIGNATURE of Z-direction be converted into X-axis digital signal, Y-axis numerical signal and Z axis digital signal, and according to
The channel parameters that family is preset selects in described X-axis digital signal, described Y-axis numerical signal and described Z axis digital signal
Kind or multiple be sent in signal analysis module 400 and described data storage module 500；
One in the signal analysis module 400 X-axis digital signal, Y-axis numerical signal and Z axis digital signal to receiving
Or multiple according to parameter preset time-domain analysis and frequency-domain analysis respectively, and show that gained time-domain analysis curve and frequency-domain analysis are bent
Line；
When signal analysis module 400 is simultaneously received described X-axis digital signal, described Y-axis numerical signal and described Z axis number
During word signal, it is additionally operable to calculate described X-axis digital signal, described Y-axis numerical signal and the vector of described Z axis digital signal,
And described vector is carried out time-domain analysis and frequency-domain analysis according to parameter preset, and show gained time-domain analysis curve and frequency domain
Analyze curve；
Signal analysis module 400 is additionally operable to preserve shown various curves.
Data storage module 500 is for when user activates, by the X-axis digital signal received, Y-axis numerical signal and Z
Axle digital signal is saved in body storage device.
In an embodiment of the present invention, as in figure 2 it is shown, signal analysis module 400 includes time-domain analysis module 410, frequency domain
Analyze module 420, display module 430 and waveform and preserve module 440；
Wherein, time-domain analysis module 410, frequency-domain analysis module 420, waveform preserve module 440 all with display module 430 phase
Even；
Time-domain analysis module 410 is for by the X-axis digital signal received, described Y-axis numerical signal and described Z axis numeral
Signal ongoing one or more according to calculating the time of integration in parameter preset and sample frequency its virtual value, and according in advance
Sample frequency in setting parameter, hits, sampling configuration carry out time-domain sampling to its virtual value, and when generating X-axis electromagnetic radiation
One or more in domain waveform, Y-axis electromagnetic radiation time domain waveform and Z axis electromagnetic radiation time domain waveform, and pass through display module
430 are shown to user；
Time-domain analysis module 410 is additionally operable to calculate the X-axis digital signal received, described Y-axis numerical signal and described Z axis
The vector that digital signal enters, and calculate the effective of described vector according to the time of integration in parameter preset and sample frequency
Value, and described vector is carried out time-domain sampling according to the sample frequency in parameter preset, hits, sampling configuration, and generates
Total electromagnetic radiation time domain waveform, and it is shown to user by display module 430；
Frequency-domain analysis module 420 is for by the X-axis digital signal received, described Y-axis numerical signal and described Z axis numeral
Signal ongoing one or more according to the time of integration in parameter preset, sample frequency, window function type, window length and frequency spectrum
Analyze bandwidth and it is carried out fast Fourier transform, and according to the sample frequency in parameter preset, hits, sampling configuration to it
Fast Fourier transform result carries out frequency domain sample, and generates X-axis electromagnetic radiation frequency-domain waveform, Y-axis electromagnetic radiation frequency-domain waveform
And one or more in Z axis electromagnetic radiation frequency-domain waveform, and it is shown to user by display module 430；
Frequency-domain analysis module 410 is additionally operable to calculate the X-axis digital signal received, described Y-axis numerical signal and described Z axis
The vector that digital signal enters, and according to the time of integration in the parameter preset in parameter preset, sample frequency, window function class
Type, window length and spectrum analysis bandwidth carry out fast Fourier transform to shown vector, and according to the sampling frequency in parameter preset
Rate, hits, sampling configuration carry out frequency domain sample to described vector, and generate total electromagnetic radiation frequency-domain waveform, and by aobvious
Show that module 430 is shown to user；
Described display module 430 prestores limit graph, at display described X-axis electromagnetic radiation frequency-domain waveform, Y-axis electromagnetism spoke
When radio frequency domains waveform, Z axis electromagnetic radiation frequency-domain waveform and total electromagnetic radiation frequency-domain waveform, show described limit graph simultaneously；
Frequency-domain analysis module 410 is additionally operable to described X-axis electromagnetic radiation frequency-domain waveform, Y-axis electromagnetic radiation frequency-domain waveform, Z
Maximum amplitude in axle electromagnetic radiation frequency-domain waveform and total electromagnetic radiation frequency-domain waveform is sent to display module 430, display module
430 are additionally operable to show in corresponding frequency-domain waveform and mark out described maximum amplitude；
Waveform preserves module 440 and is saved in local storage medium for the various waveforms shown by display module 430.
In an embodiment of the present invention, described signal analysis module 400 is additionally operable to read in data storage module 500 and stores
Digital signal, and the digital signal of described storage is carried out time-domain analysis and frequency-domain analysis, and shows its analysis result.
In the concrete application scenarios of the present invention one, using a kind of railway system provided by the present invention low-frequency AC magnetic fields
When test system is tested, the sectional area of each single shaft of three-axle magnetic field probe 100 is not more than 100 square centimeters and respective tones
Rate is more than 20KHz, and described signal analysis module 400 and data storage module 500 are integrated in the host computer of user；Surveying
During examination, tester can be according to standard-requireds such as 50500:2008, IEC/TS 62579, TB/T 3351:2014 at host computer
In parameter preset is set, and analysis module 400 is set to off-line analysis pattern；
When test, X-direction, Y direction and the Z axis side after amplifying that signal conversion module 300 will receive
To ELECTROMAGNETIC RADIATION SIGNATURE be sent to signal analysis module 400 with the form of digital signal, signal analysis module 400 is to receiving
Signal only carry out time domain and show, do not carry out frequency-domain analysis；Data storage module 500 is state of activation, data storage module 500
The ELECTROMAGNETIC RADIATION SIGNATURE of X-direction, Y direction and Z-direction that number modular converter 300 sends all is saved in the storage of host computer
In equipment；
After test terminates, signal analysis module 400 reads storage data in data storage module 500, and according to storage
Data carry out time-domain analysis and frequency-domain analysis, calculate the vector of described storage data simultaneously, and shown vector carried out
Time-domain analysis and frequency-domain analysis.
Obviously, above-described embodiment is only used to clearer expression technical solution of the present invention example, rather than right
The restriction of embodiment of the present invention.To those skilled in the art, can also be made other on the basis of the above description
The change of multi-form or variation, without departing from the inventive concept of the premise, these broadly fall into protection scope of the present invention.Cause
The protection domain of this patent of the present invention should be as the criterion with claims.
Claims (10)
1. a railway system low-frequency AC magnetic fields test system, it is characterised in that include three-axle magnetic field probe, amplification module,
Signal conversion module and signal processing module；
Wherein, described three-axle magnetic field probe, described amplification module, described signal conversion module, described signal processing module
It is sequentially connected；
Described signal conversion module for receive described three-axle magnetic field probe record and through described amplification module amplify after
First ELECTROMAGNETIC RADIATION SIGNATURE, the second ELECTROMAGNETIC RADIATION SIGNATURE and the 3rd ELECTROMAGNETIC RADIATION SIGNATURE, and by described first ELECTROMAGNETIC RADIATION SIGNATURE,
Second ELECTROMAGNETIC RADIATION SIGNATURE and the 3rd ELECTROMAGNETIC RADIATION SIGNATURE are converted into the first digital signal, the second digital signal and the 3rd numeral letter
Number, and according to parameter preset by described first digital signal, described second digital signal and described 3rd digital signal
Kind or multiple be sent to described signal processing module；
Described signal processing module is used for receiving described first digital signal, described second digital signal and described 3rd numeral letter
Number one or more, and carry out time-domain analysis and frequency-domain analysis according to the parameter preset signal to receiving, and obtain analysis
Result；
Described signal processing module is additionally operable to calculate and receives described first digital signal, described second digital signal and the described 3rd
Its vector of digital signal, and according to described parameter preset, described vector signal is carried out time-domain analysis and frequency-domain analysis,
And obtain analysis result.
2. the railway system as claimed in claim 1 low-frequency AC magnetic fields test system, it is characterised in that described three-axle magnetic field is visited
Head includes three outfans, and described amplification module includes three inputs and three outfans, and described signal conversion module includes
Outfan and three inputs；
Three outfans of described three-axle magnetic field probe are respectively connected with three inputs of described amplification module, described amplification mould
Three outfans of block are respectively connected with three inputs of described signal conversion module, the outfan of described signal conversion module
It is connected with described signal analysis module；
Three outfans of described three-axle magnetic field probe are respectively used to export described first ELECTROMAGNETIC RADIATION SIGNATURE, described second electromagnetism
Radiation signal and described 3rd ELECTROMAGNETIC RADIATION SIGNATURE.
3. the railway system as claimed in claim 1 or 2 low-frequency AC magnetic fields test system, it is characterised in that at described signal
Reason module includes time-domain analysis module, display module；
Wherein, one end of described time-domain analysis module is connected with described signal conversion module, another of described time-domain analysis module
End is connected with described display module；
Described time-domain analysis module is for according to the described parameter preset described first digital signal to receiving, described second number
In word signal and described 3rd digital signal one or more be filtered, integration sampling, and raw according to described sampled result
Become time domain specification curve, and by the time domain specification curve of described first digital signal, the time domain specification of described second digital signal
One or more in the time domain specification curve of curve and described 3rd digital signal are sent to described display module；
Described first digital signal, described second digital signal and described that described time-domain analysis module also receives with calculating
The vector of three digital signals, and according to parameter preset, described vector is filtered, integration sampling, and it is special to generate time domain
Linearity curve, and the time domain specification curve of described vector is sent described display module.
4. the railway system's low-frequency AC magnetic fields test system as described in arbitrary in claim 1-3, it is characterised in that described letter
Number processing module includes frequency-domain analysis module, display module；
Wherein, one end of described frequency-domain analysis module is connected with described signal conversion module, another of described frequency-domain analysis module
End is connected with described display module；
Described frequency-domain analysis module is for according to the parameter preset described first digital signal to receiving, described second numeral letter
Number and described 3rd digital signal in one or more carry out fast Fourier transform, and according to described fast Fourier transform
Result generates frequency domain characteristic curve, and by the frequency domain characteristic curve of described first digital signal, the frequency of described second digital signal
Territory characteristic curve, described 3rd digital signal frequency domain characteristic curve in one or more be sent to described display module；
Described first digital signal, described second digital signal and described that described frequency-domain analysis module also receives with calculating
The vector of three digital signals, and described vector carried out fast Fourier transform according to parameter preset, and according to described soon
The result of speed Fourier transformation generates frequency domain characteristic curve, and the frequency domain characteristic curve of described vector is sent described display
Module.
5. the railway system as claimed in claim 4 low-frequency AC magnetic fields test system, it is characterised in that described frequency-domain analysis mould
Block is additionally operable to the frequency domain characteristic curve of described first digital signal, the frequency domain characteristic curve of described second digital signal, described
The frequency domain characteristic curve of the 3rd digital signal, described vector frequency domain characteristic curve in one or more maximum amplitude send
To described display module.
6. the railway system as claimed in claim 4 low-frequency AC magnetic fields test system, it is characterised in that described display module is pre-
There is limit graph；Described display module be additionally operable to display the frequency domain characteristic curve of described first digital signal, described second
The frequency domain characteristic curve of digital signal, the frequency domain characteristic curve of described 3rd digital signal, the frequency domain characteristic song of described vector
In line a kind of and multiple time, show described limit graph simultaneously.
7. the railway system's low-frequency AC magnetic fields test system as described in arbitrary in claim 3-6, it is characterised in that described letter
Number processing module also includes that waveform preserves module；Described waveform preserves module and is connected with shown display module；Described waveform preserves
Module is for preserving the curve that described display module shows.
8. the railway system's low-frequency AC magnetic fields test system as described in arbitrary in claim 1-7, it is characterised in that also include
Data storage module；
Wherein, described data storage module is connected with described signal conversion module；Described data storage module is used for preserving described
Described first digital signal, described second digital signal and described 3rd digital signal of signal conversion module output.
9. the railway system's low-frequency AC magnetic fields test system as described in arbitrary in claim 8, it is characterised in that described signal
Processing module is also connected with described data storage module；Described signal processing module is additionally operable to read in described data storage module
One or more in described first digital signal, described second digital signal and described 3rd digital signal of storage.
10. the railway system's low-frequency AC magnetic fields test system as described in arbitrary in claim 1-9, it is characterised in that described
Parameter preset includes channel parameters, sample frequency, hits, sampling configuration, window length, window function type, the time of integration and frequency spectrum
One or more of analytic band alleviating distention in middle-JIAO.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN108152605A (en) * | 2017-12-27 | 2018-06-12 | 长春长光精密仪器集团有限公司 | A kind of electric field detecting system |
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| CN113341351A (en) * | 2021-06-08 | 2021-09-03 | 广东技术师范大学 | Omnidirectional magnetic induction intensity testing instrument calibration and time-frequency testing method and device |
| CN113359070A (en) * | 2021-06-17 | 2021-09-07 | 北京交通大学 | Low-frequency magnetic field frequency spectrum measuring method and system |
| CN114355066A (en) * | 2021-11-23 | 2022-04-15 | 威凯检测技术有限公司 | Device and method for testing working environment conformity of low-frequency equipment such as subway vehicle transponder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106950885A (en) * | 2017-04-19 | 2017-07-14 | 成都理工大学 | A kind of time and frequency domain analysis system of signal |
| CN108152605A (en) * | 2017-12-27 | 2018-06-12 | 长春长光精密仪器集团有限公司 | A kind of electric field detecting system |
| CN111521958A (en) * | 2020-04-22 | 2020-08-11 | 北京森馥科技股份有限公司 | Low-frequency magnetic field measuring method, device, electronic equipment and storage medium |
| CN113341351A (en) * | 2021-06-08 | 2021-09-03 | 广东技术师范大学 | Omnidirectional magnetic induction intensity testing instrument calibration and time-frequency testing method and device |
| CN113359070A (en) * | 2021-06-17 | 2021-09-07 | 北京交通大学 | Low-frequency magnetic field frequency spectrum measuring method and system |
| CN114355066A (en) * | 2021-11-23 | 2022-04-15 | 威凯检测技术有限公司 | Device and method for testing working environment conformity of low-frequency equipment such as subway vehicle transponder |
| CN114355066B (en) * | 2021-11-23 | 2024-01-05 | 威凯检测技术有限公司 | Device and method for testing working environment compliance of low-frequency equipment such as subway vehicle transponder and the like |
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