CN107741541A - A kind of rail traffic vehicles built-in field intensity near-field test method and system - Google Patents
A kind of rail traffic vehicles built-in field intensity near-field test method and system Download PDFInfo
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- CN107741541A CN107741541A CN201710947960.2A CN201710947960A CN107741541A CN 107741541 A CN107741541 A CN 107741541A CN 201710947960 A CN201710947960 A CN 201710947960A CN 107741541 A CN107741541 A CN 107741541A
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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
- 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
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
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- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a kind of rail traffic vehicles built-in field intensity near-field test method, first, by when rail traffic vehicles are run, the electromagnetic signal of target location is collected, obtains the corresponding electromagnetic signal of the radiation intensity of any specified location in electromagnetic field environment residing for each parts in rail traffic vehicles；Then, the electromagnetic signal disturb, be mixed conversion, filtering and detection processing, obtain effective electromagnetic signal, and obtain electromagnetic field intensity angle value corresponding with effective electromagnetic signal, reference can be provided for tester.As can be seen here, this method of testing is after each component device entrucking, and the electromagnetic signal by collecting target location can effectively evaluate the electromagnetic environment radiation intensity residing for each parts, to instruct each component device in the rational deployment of vehicle interior.In addition, the invention also discloses a kind of rail traffic vehicles built-in field intensity near field test system, effect is as above.
Description
Technical field
The present invention relates to field of track traffic, more particularly to a kind of rail traffic vehicles built-in field intensity near-field test
Method and system.
Background technology
Electromagnetic compatibility refer generally to electrically and electronic equipment can perform respective function in common electromagnetic environment shape coexists
State, that is, require above-mentioned various equipment in same electromagnetic environment can normal work, do not interfere with each other again, reach compatibility status.
At present, in order to ensure the Electro Magnetic Compatibility of rail traffic vehicles, although before component device entrucking, can be
Parts level degree of the disturbing experiment of the antijamming capability for verifying rail traffic vehicles component device is carried out in laboratory, still
Because each component device of rail traffic vehicles is after entrucking, high current, the component device of senior engineer's working frequency and low current,
The component device of low working frequency coexists in same working environment, and the electromagnetic environment of vehicle interior becomes extremely complex,
So that although each component device before entrucking, is tested by the parts level degree of disturbing that is carried out in laboratory internal, but
Be, when rail traffic vehicles are run, still have component device the normal work of other component devices is impacted or by
The interference of other component devices and can not the situation of normal work occur.
Therefore, how after each component device entrucking, the electromagnetic environment radiation effectively assessed residing for each parts is strong
Degree, in the rational deployment of vehicle interior it is that the technology that those skilled in the art need to solve at present is asked to instruct each component device
Topic.
The content of the invention
It is an object of the invention to provide a kind of rail traffic vehicles built-in field intensity near-field test method and system, energy
Enough after each component device entrucking, the electromagnetic environment radiation intensity residing for each parts is effectively assessed, to instruct each zero
Rational deployment of the part equipment in vehicle interior.
In order to solve the above-mentioned technical problem, the present invention additionally provides a kind of rail traffic vehicles built-in field intensity it is near
Field method of testing, including：
When rail traffic vehicles are run, the electromagnetic signal of target location is collected；
The electromagnetic signal disturb, is mixed conversion, filtering and detection processing, obtains effective electromagnetic signal；
It is for reference to obtain electromagnetic field intensity angle value corresponding with the effectively electromagnetic signal.
Preferably, described when rail traffic vehicles are run, the electromagnetic signal for collecting target location specifically includes：
In the control system and accessory system of the rail traffic vehicles to remain static after electricity, the mesh is collected
The electromagnetic signal of cursor position；
When dynamic operation under the rail traffic vehicles are in tractive force by the rule of small increase, the target location is collected
Electromagnetic signal；
When the rail traffic vehicles in tractive force by dynamic operation under the rule that reduces greatly when, collect the target location
Electromagnetic signal.
Preferably, it is described when dynamic operation under the rail traffic vehicles are in tractive force by the rule of small increase, collect
The electromagnetic signal of the target location is specially：
When the traction handle of the rail traffic vehicles is sequentially placed into 30% traction level, 50% traction level, 100% leads
When drawing level, the electromagnetic signal of the target location is collected.
Preferably, it is described when the rail traffic vehicles in tractive force by dynamic operation under the rule that reduces greatly when, collect
The electromagnetic signal of the target location is specially：
When the traction handle of the rail traffic vehicles is sequentially placed into 30% braking level, 50% braking level, 100% system
During dynamic level, the electromagnetic signal of the target location is collected.
Preferably, described when rail traffic vehicles are run, the electromagnetic signal for collecting target location specifically includes：
When the rail traffic vehicles cross split-phase, the electromagnetic signal of the target location is collected.
Preferably, after acquisition electromagnetic field intensity angle value corresponding with the effectively electromagnetic signal, the test side
Method also includes：
Recurrence processing is carried out to each electromagnetic field intensity angle value of the same target location, and drawn according to result
Electromagnetic field intensity tendency chart.
Preferably, the test mode also includes：
When the rail traffic vehicles vehicle powers off, the electromagnetic signal of the target location is collected.
In order to solve the above-mentioned technical problem, a kind of rail traffic vehicles built-in field intensity near field that the present invention also provides
Test system, including：Omnidirectional antenna and the superheterodyne receiver being connected with the omnidirectional antenna；
The omnidirectional antenna is used for the electromagnetic signal for collecting target location；
The superheterodyne receiver is used to analyze and process the electromagnetic signal to obtain effective electromagnetic signal, and
Show the electromagnetic field intensity angle value effectively corresponding to electromagnetic signal.
Preferably, the omnidirectional antenna is connected with the superheterodyne receiver by coaxial cable.
Preferably, the test system also includes being used for the wooden fixed mount for fixing the omnidirectional antenna.
Rail traffic vehicles built-in field intensity near-field test method provided by the invention, first, by being handed over when track
Be open to traffic operation when, collect the electromagnetic signal of target location, obtain electromagnetic field ring residing for each parts in rail traffic vehicles
The electromagnetic signal corresponding with the electromagnetic environment radiation intensity residing for each parts of any specified location in border；Then, to institute
State electromagnetic signal disturb, be mixed conversion, filtering and detection processing, obtain effective electromagnetic signal, and obtain and effectively electricity
Electromagnetic field intensity angle value corresponding to magnetic signal, reference can be provided for tester, reach and instruct tester or related work people
Member carries out the purpose of rational deployment to each component device of vehicle interior.As can be seen here, this method of testing is set in each parts
After standby entrucking, the electromagnetic signal by collecting target location can effectively evaluate the electromagnetic environment radiation residing for each parts
Intensity, to instruct each component device in the rational deployment of vehicle interior.In addition, present invention also offers a kind of rail vehicle
Built-in field intensity near field test system, effect is as above.
Brief description of the drawings
In order to illustrate the embodiments of the present invention more clearly, the required accompanying drawing used in embodiment will be done simply below
Introduce, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ordinary skill people
For member, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of stream of rail traffic vehicles built-in field intensity near-field test method provided in an embodiment of the present invention
Cheng Tu；
Fig. 2 is one kind provided in an embodiment of the present invention flow chart corresponding with step S10；
Fig. 3 is a kind of knot of rail traffic vehicles built-in field intensity near field test system provided in an embodiment of the present invention
Composition.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based on this
Embodiment in invention, those of ordinary skill in the art on the premise of creative work is not paid, obtained it is all its
His embodiment, belongs to the scope of the present invention.
It is an object of the invention to provide a kind of rail traffic vehicles built-in field intensity near-field test method and system, energy
Enough after each component device entrucking, the electromagnetic environment radiation intensity residing for each parts is effectively assessed, to instruct each zero
Rational deployment of the part equipment in vehicle interior.
In order that those skilled in the art is better understood from technical solution of the present invention, below in conjunction with the accompanying drawings and it is embodied
The present invention is described in further detail for mode.
Fig. 1 is a kind of stream of rail traffic vehicles built-in field intensity near-field test method provided in an embodiment of the present invention
Cheng Tu.As shown in figure 1, this method of testing includes：
S10：When rail traffic vehicles are run, the electromagnetic signal of target location is collected.
Target location can be any specified location in electromagnetic field environment residing for each parts in rail traffic vehicles.Example
Such as, it is possible to specify it is corresponding with the height of target detection parts, distance objective test parts horizontal range for 20cm and/
Or 25cm, and/or 30cm, and/or 35cm position is as target location.
S11：Electromagnetic signal disturb, is mixed conversion, filtering and detection processing, obtains effective electromagnetic signal.
The electromagnetic signal being collected into is high-frequency signal, and wherein doped with interference signal, in order to ensure that foundation is collected into
Electromagnetic signal can obtain more accurate electromagnetic field intensity angle value, can before the electromagnetic signal to being collected into is analyzed
Handled with first carrying out interference to the electromagnetic signal being collected into, specifically, can by preselection filter filtering interference signals, when
So, it is more thorough in order to which interference signal is filtered out, it can also first pass through and decline before by preselection filter filtering interference signals
Subtract device and the original electromagnetic signal being collected into is subjected to attenuation processing.Through the past, the electromagnetic signal of interference processing is more pure, can be with
It is mixed by frequency mixer and standard signal and is converted into intermediate-freuqncy signal, then filtering out effective intermediate frequency by intermediate-frequency filter again believes
Number, and effective intermediate-freuqncy signal is zoomed in or out to carry out detection to effective intermediate-freuqncy signal by wave detector, obtain effective electromagnetism
Signal.Wherein, standard signal can be local oscillation signal, then corresponding, and effective intermediate-freuqncy signal is local oscillator than the electromagnetism after going interference
The high intermediate-freuqncy signal of signal.
It should be noted that above-described to electromagnetic signal disturb, be mixed conversion, filtering and detection processing
Method is only a kind of embodiment, does not represent and only has a kind of above-mentioned implementation method, in actual applications, can also be by other
Method realizes aforesaid operations, and the present invention does not limit.
S12：It is for reference to obtain electromagnetic field intensity angle value corresponding with effective electromagnetic signal.
After effective electromagnetic signal is obtained, can will electromagnetic field intensity angle value corresponding with effective electromagnetic signal over the display
Show, so as to dependence test personnel can according to target location electromagnetic field intensity angle value to the electricity residing for each target parts
Magnetic environment radiation intensity makes effective assessment, and rational deployment is carried out to each component device of vehicle interior.It is it is, of course, also possible to pre-
The normal intensity value first set, reported if electromagnetic field intensity angle value corresponding with effective electromagnetic signal is higher than normal intensity value
It is alert, to prompt dependence test personnel to be made effectively to the electromagnetic environment radiation intensity residing for each target parts according to warning message
Assess, rational deployment is carried out to each component device of vehicle interior.Wherein, the mode of alarm, can be by sound or lamp
Light alarm, buzzer or indicator lamp are such as set.
Therefore, rail traffic vehicles built-in field intensity near-field test method provided in an embodiment of the present invention, first, lead to
During excessive rail traffic vehicles operation, the electromagnetic signal of target location is collected, obtains each parts institute in rail traffic vehicles
Locate the electromagnetic signal corresponding with the electromagnetic environment radiation intensity residing for each parts of any specified location in electromagnetic field environment；
Then, electromagnetic signal disturb, be mixed conversion, filtering and detection processing, obtain effective electromagnetic signal, and obtain with having
Electromagnetic field intensity angle value corresponding to imitating electromagnetic signal, can provide reference for tester, reach and instruct tester or related work
Make the purpose that personnel carry out rational deployment to each component device of vehicle interior.As can be seen here, this method of testing is at each zero
After part equipment entrucking, the electromagnetic signal by collecting target location can effectively evaluate the electromagnetic environment residing for each parts
Radiation intensity, to instruct each component device in the rational deployment of vehicle interior.
When being in due to each component device in different working conditions, the electromagnetic field around it can correspondingly become
To change, the influence of the work to each parts is also not quite similar, so, in order to realize the accurate measurement to electromagnetic field intensity, to mesh
The collection opportunity of electromagnetic signal at cursor position is particularly important.
Fig. 2 is one kind provided in an embodiment of the present invention flow chart corresponding with step S10.As shown in Fig. 2 in Fig. 1 base
On plinth, mode is preferably carried out as one kind, step S10 is specifically included：
S20：In the control system and accessory system of the rail traffic vehicles to remain static after electricity, target position is collected
The electromagnetic signal put.
S21：When dynamic operation under rail traffic vehicles are in tractive force by the rule of small increase, the electricity of target location is collected
Magnetic signal.
S22：When rail traffic vehicles in tractive force by dynamic operation under the rule that reduces greatly when, collect the electricity of target location
Magnetic signal.
It is worth noting that, in order to improve measurement accuracy, if when rail traffic vehicles are run, target location is collected
Electromagnetic signal, then when carrying out magnetic field signal each time and collecting, within certain time (such as 10s) track should be kept to hand over
The current operating conditions being open to traffic are constant.For example, the electricity of target location is collected when maximal rate is run in rail traffic vehicles
Magnetic signal, then rail traffic vehicles should be kept to run at least 10s with maximal rate.
Rail traffic vehicles during dynamic operation, under different traction gears, vehicle plays different tractive force, vehicle
Internal electromagnetic environment accordingly can loudly change.Therefore, mode is preferably carried out as one kind, when rail traffic vehicles are being drawn
Power is by during dynamic operation, the electromagnetic signal for collecting target location is specially under the rule of small increase：When leading for rail traffic vehicles
Draw handle be sequentially placed into 30% traction level, 50% traction level, 100% traction level when, collect target location electromagnetism letter
Number.
Mode is preferably carried out as one kind, when rail traffic vehicles in tractive force by dynamic operation under the rule that reduces greatly
When, the electromagnetic signal for collecting target location is specially：When the traction handle of rail traffic vehicles be sequentially placed into 30% braking level,
When 50% braking level, 100% braking level, the electromagnetic signal of target location is collected.
Rail vehicle can be powered off suddenly when crossing split-phase with it is unexpected electric, cause vehicle interior high current occur high-frequency
Impact signal, so as to strong jamming occur.Therefore, mode is preferably carried out as one kind, when rail traffic vehicles are run, collected
The electromagnetic signal of target location specifically includes：When rail traffic vehicles cross split-phase, the electromagnetic signal of target location is collected.
As can be seen here, the present embodiment is by under the different running statuses of rail traffic vehicles, to the electricity of each target location
Magnetic field intensity measures, and realizes to the accurate of the electromagnetic field that is in around each component device in different working conditions
Measurement, can more efficiently evaluate the electromagnetic environment radiation intensity residing for each parts, to each component device in vehicle
Internal rational deployment plays stronger directive function.
For the ease of assessing the electromagnetic environment radiation intensity residing for each parts, in the base of any of the above-described embodiment
On plinth, mode is preferably carried out as one kind, after execution of step S12, in addition to：To each electromagnetism of same target location
Field intensity value carries out recurrence processing, and draws electromagnetic field intensity tendency chart according to result.Specifically, when getting and target
The height for testing parts corresponds to, and the horizontal range of distance objective test parts is r1First object position electric-field intensity
Value E1When, formula can be utilizedCalculate, distance objective test zero corresponding with the height of target detection parts
The horizontal range of part is the electric field intensity value E of r the second target location；When getting the height pair with target detection parts
Should, the horizontal range of distance objective test parts is r1First object position magnetic field intensity H1When, formula can be utilizedCalculate corresponding with the height of target detection parts, the horizontal range of distance objective test parts is the of r
The field strength values H of two target locations.
In order to exclude due to being disturbed caused by the reflection of the equipment of vehicle interior, on the basis of any of the above-described embodiment,
Mode is preferably carried out as one kind, in addition to：When rail traffic vehicles vehicle powers off, the electromagnetism letter of target location is collected
Number.It is understood that preferably, can be performed before step S10 is performed when rail traffic vehicles vehicle powers off, collect
The step of electromagnetic signal of target location.
Above for a kind of implementation of rail traffic vehicles built-in field intensity near-field test method provided by the invention
Example is described in detail, present invention also offers a kind of test system corresponding with the method for testing, due to components of system as directed
Embodiment and the embodiment of method part mutually correlate, therefore the embodiment of components of system as directed refers to the embodiment of method part
Description, wouldn't repeat here.
Fig. 3 is a kind of knot of rail traffic vehicles built-in field intensity near field test system provided in an embodiment of the present invention
Composition.As shown in figure 3, this test system includes：Omnidirectional antenna 30 and the superheterodyne receiver 31 being connected with omnidirectional antenna 30.
Omnidirectional antenna 30 is used for the electromagnetic signal for collecting target location；
Superheterodyne receiver 31 is used to analyze and process electromagnetic signal to obtain effective electromagnetic signal, and shows
Imitate electromagnetic field intensity angle value corresponding to electromagnetic signal.
It should be noted that in order to ensure the measurement accuracy of test system, can be in the survey provided using the present embodiment
Before test system, the antenna factor of omnidirectional antenna 30 is calibrated in fully anechoic chamber, and knows superheterodyne receiver 31
Other omnidirectional antenna 30 is to establish being reliably connected between superheterodyne receiver 31 and omnidirectional antenna 30.In addition, using this survey
During test system, in order to avoid interference, ensure measurement accuracy, omnidirectional antenna 30 should be fixed using non-magnet_conductible material.
For promotion signal transmission performance, mode, omnidirectional antenna 30 and superheterodyne are preferably carried out as one kind
Machine 31 is connected by coaxial cable.
In order to ensure the measurement accuracy of test system, mode, the survey that the present embodiment provides are preferably carried out as one kind
Test system also includes being used for the wooden fixed mount (such as wooden tripod) for fixing omnidirectional antenna 30.It is it is, of course, understood that solid
The device for determining omnidirectional antenna 30 can be with fixed mount made of other non-magnet_conductible materials, and such as non-magnetic glass fibre material is made
Fixed mount.
In specific implementation, the reception impedance of superheterodyne receiver 31 can be arranged to 50 Ω, and surveying in dynamic
During examination, the bandwidth of superheterodyne receiver 31 can be arranged to -3dB, can be by superheterodyne receiver in static test
31 bandwidth is arranged to -6dB.
In summary, rail traffic vehicles built-in field intensity near field test system provided in an embodiment of the present invention, can
When rail traffic vehicles is run, the electromagnetic signal of target location is collected by omnidirectional antenna, obtains rail traffic vehicles
Any specified location is relative with the electromagnetic environment radiation intensity residing for each parts in electromagnetic field environment residing for interior each parts
The electromagnetic signal answered；Then superheterodyne receiver is recycled to electromagnetic signal disturb, be mixed conversion, filtering and detection
Processing, effective electromagnetic signal is obtained, and show electromagnetic field intensity angle value corresponding with effective electromagnetic signal, can carried for tester
For reference, the mesh for instructing tester or relevant staff to carry out rational deployment to each component device of vehicle interior is reached
's.As can be seen here, this test system can have after each component device entrucking by the electromagnetic signal for collecting target location
Effect evaluates the electromagnetic environment radiation intensity residing for each parts, to instruct each component device in the reasonable cloth of vehicle interior
Office.
Rail traffic vehicles built-in field intensity near-field test method and system provided by the present invention are carried out above
It is discussed in detail.Each embodiment is described by the way of progressive in specification, each embodiment stress be with it is other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention,
Some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into the protection domain of the claims in the present invention
It is interior.
It should also be noted that, in this manual, such as first and second etc relational terms are used merely to one
Individual entity either operates to be made a distinction with another entity or operation, and is not necessarily required and either implied these entities or behaviour
Any this actual relation or order between work be present.Moreover, term " comprising ", "comprising" or its any variant are intended to
Cover including for nonexcludability, so that process, method, article or equipment including a series of key element not only include that
A little key elements, but also other key elements including being not expressly set out, either also include for this process, method, article or set
Standby intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Other identical element in the process including the key element, method, article or equipment also be present.
Claims (10)
- A kind of 1. rail traffic vehicles built-in field intensity near-field test method, it is characterised in that including：When rail traffic vehicles are run, the electromagnetic signal of target location is collected；The electromagnetic signal disturb, is mixed conversion, filtering and detection processing, obtains effective electromagnetic signal；It is for reference to obtain electromagnetic field intensity angle value corresponding with the effectively electromagnetic signal.
- 2. method of testing according to claim 1, it is characterised in that it is described when rail traffic vehicles are run, collect mesh The electromagnetic signal of cursor position specifically includes：In the control system and accessory system of the rail traffic vehicles to remain static after electricity, the target position is collected The electromagnetic signal put；When dynamic operation under the rail traffic vehicles are in tractive force by the rule of small increase, the electricity of the target location is collected Magnetic signal；When the rail traffic vehicles in tractive force by dynamic operation under the rule that reduces greatly when, collect the electricity of the target location Magnetic signal.
- 3. method of testing according to claim 2, it is characterised in that it is described when the rail traffic vehicles tractive force by Under the rule of small increase during dynamic operation, the electromagnetic signal for collecting the target location is specially：When the traction handle of the rail traffic vehicles is sequentially placed into 30% traction level, 50% traction level, 100% draft stage During position, the electromagnetic signal of the target location is collected.
- 4. method of testing according to claim 2, it is characterised in that it is described when the rail traffic vehicles tractive force by Under the rule reduced greatly during dynamic operation, the electromagnetic signal for collecting the target location is specially：When the traction handle of the rail traffic vehicles is sequentially placed into 30% braking level, 50% braking level, 100% retrostage During position, the electromagnetic signal of the target location is collected.
- 5. method of testing according to claim 1, it is characterised in that it is described when rail traffic vehicles are run, collect mesh The electromagnetic signal of cursor position specifically includes：When the rail traffic vehicles cross split-phase, the electromagnetic signal of the target location is collected.
- 6. according to the method for testing described in claim any one of 1-5, it is characterised in that in the acquisition and effective electromagnetism After electromagnetic field intensity angle value corresponding to signal, in addition to：Recurrence processing is carried out to each electromagnetic field intensity angle value of the same target location, and electromagnetism is drawn according to result Field intensity tendency chart.
- 7. according to the test mode described in claim any one of 1-5, it is characterised in that also include：When the rail traffic vehicles vehicle powers off, the electromagnetic signal of the target location is collected.
- A kind of 8. rail traffic vehicles built-in field intensity near field test system, it is characterised in that including：Omnidirectional antenna and with The superheterodyne receiver of the omnidirectional antenna connection；The omnidirectional antenna is used for the electromagnetic signal for collecting target location；The superheterodyne receiver is used to analyze and process the electromagnetic signal to obtain effective electromagnetic signal, and shows The electromagnetic field intensity angle value effectively corresponding to electromagnetic signal.
- 9. test system according to claim 8, it is characterised in that the omnidirectional antenna and the superheterodyne receiver Connected by coaxial cable.
- 10. test system according to claim 8 or claim 9, it is characterised in that also include being used to fix the omnidirectional antenna Wooden fixed mount.
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| CN110740466A (en) * | 2018-07-19 | 2020-01-31 | 比亚迪股份有限公司 | Wireless network performance test platform and method |
| CN112183339A (en) * | 2020-09-28 | 2021-01-05 | 中车长春轨道客车股份有限公司 | Electromagnetic environment assessment method and device and server |
| CN113655733A (en) * | 2021-09-09 | 2021-11-16 | 中车长春轨道客车股份有限公司 | EMC (electromagnetic compatibility) semi-physical simulation method for magnetic field of axle counter of rail transit vehicle |
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| WO2022062987A1 (en) * | 2020-09-28 | 2022-03-31 | 中车长春轨道客车股份有限公司 | Electromagnetic environment evaluation method and device, and server |
| CN112183339B (en) * | 2020-09-28 | 2024-02-20 | 中车长春轨道客车股份有限公司 | Electromagnetic environment assessment method, device and server |
| CN113655733A (en) * | 2021-09-09 | 2021-11-16 | 中车长春轨道客车股份有限公司 | EMC (electromagnetic compatibility) semi-physical simulation method for magnetic field of axle counter of rail transit vehicle |
| CN113655733B (en) * | 2021-09-09 | 2023-09-29 | 中车长春轨道客车股份有限公司 | Magnetic field EMC semi-physical simulation method for axle counter of rail transit vehicle |
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