CN105292177A - Method for measuring track corrugation by utilizing axle box vibration and impact information - Google Patents
Method for measuring track corrugation by utilizing axle box vibration and impact information Download PDFInfo
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Abstract
The invention provides a method for measuring track corrugation by utilizing axle box vibration and impact information. A vibration and impact information acquisition device contains a rotating speed sensor S arranged on a wheel set shaft of an operating vehicle, a vibration and impact detection sensor A1 and a vibration and impact detection sensor A2 which are arranged on an axle box bearing block at the two ends of a wheel set, an online monitoring device JKQ and a corrugation ground analysis system DMXT, wherein the rotating speed sensor S, the vibration and impact detection sensor A1 and the vibration and impact detection sensor A2 are connected with the online monitoring device JKQ, and detection, acquisition, diagnosis, analysis and decision of vehicular corrugation information of the operating vehicle are realized by virtue of the online monitoring device JKQ or by downloading data of the online monitoring device JKQ to the corrugation ground analysis system DMXT. The method for measuring the track corrugation by utilizing the axle box vibration and impact information has the advantages that the axle box vibration and impact information of the operating vehicle are acquired, based on a generalized resonance measurement principle, vehicular real-time track corrugation wave length and wave depth measurement and analysis or track corrugation wave length and wave depth measurement and analysis after downloading is completed are realized, and the manual workload is greatly reduced.
Description
Technical field
The invention belongs to track traffic track field, be specifically related to the method for the vibration of a kind of axle box, impact information measurement track ripple mill, be mainly used in, by detecting vibration acceleration, the impact information of the axle box of supporting wheel axletree in the rail traffic vehicles motions such as subway, measuring wavelength, the depth of convolution of track ripple mill in real time.
Background technology
Track ripple mill is the irregularity phenomenon of raceway surface wave-like, is a kind of form of track defect.Track ripple mill all can produce great impact to wheel rail relation, train EEF bogie fault, the harm caused has: one is potential safety hazard, such as vehicle grinds crest by ripple, produce strong vibration when falling trough, not only make the ripple mill expansion of track, the mode of operation of wheel, vehicle each parts relevant with rail is worsened, accelerate the mechanical damage of the associated components such as bogie truck, to overstep the limit risk and routine servicing maintenance cost when increasing train operation, and cause the EEF bogie unit failures such as the fracture of axle fracture, bracket fixing bolt, truck frame crackle; Two is noise emissioies, and when vehicle is interval by ripple mill, can send howling, be the main source of rail transit noise, has a strong impact on the comfort level of passenger; More seriously, rail corrugation develops into a certain degree, implies the danger causing the grave accident such as vehicle derailing, overturning.
For these reasons, each big city MTR of China formulates regular track polishing plan, reduces the impact of ripple mill on vehicle, reduces the inordinate wear of wheel track, reduce train operation noise and improve operation stability with this.In order to determine the interval that track ripple mill occurs, need to measure in time track ripple mill, evaluate.
At present, two parameters are mainly understood to the concern of track ripple mill: wavelength and the depth of convolution.When train is by track that wavelength is different with the depth of convolution, the vibration of corresponding generation is different with impact, also different to the degree of injury of vehicle.Wavelength and the depth of convolution concentrated expression light and heavy degree of ripple mill.Related data shows: when the depth of convolution of ripple mill reaches 0.5mm, when wavelength is 0.3m, about speed of a motor vehicle 60km/h, and the live load that track rail level bears will be increased to 151% of static weight, cause rail to shorten 50% ~ 75% service life thus; And by ripple grind the Wheel Rail Vibration caused also cause vehicle part accelerate damage.
In early days to the measurement of track ripple mill, main employing ripple mill surveys chi and ripple mill waggon, and main dependence manual operation is implemented.Stage has developed " track checking car ".
Ripple mill is surveyed chi and is mainly adopted static pointwise hand dipping, measure length and be generally 1 ~ 1.2m, ripple mill within the scope of rail longitudinal length 0.8 ~ 1m can be measured, wavelength can be surveyed and be limited in scope, this method detection efficiency is very low, when often wanting ripple mill formed and be developed to very serious could by ground ironworker be engaged in personnel find.Known according to relevant report, because each polishing ability of rail grinding machine is 0.1 ~ 0.2mm.When work business personnel find ripple mill track, probably ripple mill situation is comparatively serious, needs repeatedly to polish to it, therefore polishes with high costs., polish not in place, track ripple mill continues place in operation when not being eliminated in time meanwhile, causes ripple to grind and continues to spread, finally can only switch tracks, cause great cost consumption.
Ripple mill waggon can be used for rail long distance continuous gauging, expands and can survey range of wavelength, surveys chi mode, use more convenient, measure efficiency higher relative to the ripple mill of pure hand dipping.But this metering system is very slow because measuring car gait of march, can not carry out when subway is normally operated, production time has generally been arranged in operations task on the same day, after the whole off-line warehouse-in of vehicle, in the of short duration period operation in midnight to morning, because monitoring mileage is long, task amount is large, monitoring equipment and human input must be increased.
Along with six speed-raisings of nearly railway transport vehicle during the last ten years, the Quick Extended of railway construction and operation mileage, with the fast development of urban track traffic, the importance that rail corrugation is measured is increasingly outstanding, too impatient to wait to the strick precaution of the potential potential safety hazard of rail corrugation.Therefore, exploitation degree of automation high, technology that dynamic on-line checkingi can be carried out rail corrugation, represent the main trend of this art, the various track checking car technical scheme of numerous and confused research.Wherein, typical scenario is published in " Chinese railway science " 06 phase in 2002, author Liu Lingping etc.: " research and development of rail undulatory wear checking system ", and disclosing one is arranged on track checking car, rail wave mill is carried out to the device of dynamic on-line checkingi.
Liu Lingping etc. disclose this track checking car in " research and development of rail undulatory wear checking system " and carry out dynamic online measuring technique scheme, degree of automation is high, significantly can alleviate the labour intensity of manual type in the past, improve and measure efficiency, good effect can be played in rail corrugation testing.Just, the technical scheme of this track checking car, its limitation and defect are also fairly obvious.Such as, because track checking car detects the conventional operation speed of a motor vehicle of the speed of a motor vehicle lower than railway, its work can not with vehicle in use United Dispatching, and must dispatch and arrange special track checking car ripple mill to detect the period, thus working process affects the normal operation of railway and does not allow frequent use; Thus can not possess the service time detects ripple mill state and the impact on vehicle in real time; Particularly track ripple mill is once occur, and because vehicle is many and intensive, the development of track ripple mill is very fast, and the detection that track checking car is delayed, causes the very large contradiction such as non real-time nature, inadaptability.Meanwhile, in principle of measurement, the program adopts inertia method principle of measurement, carries out equidistant sampling, display and storage to axle box acceleration signal, then exports the displacement or the standard deviation that represent rail corrugation amplitude through digital processing.This inertia method or inertial reference method principle of measurement, its survey precision can not ensure, because acceleration/accel is relevant to the track checking car speed of a motor vehicle, the speed during operation of track checking car speed of a motor vehicle out of reach, acceleration signal is faint, signal to noise ratio is low, and integral operation low frequency signal easily causes saturation integral, is a kind of metering system had much room for improvement.And in recent years in railway, guideway vehicle, fan safe detection technique, adopt generalized resonance, resonance and demodulation, spectrum analysis technique, represent future thrust.
Therefore, exploitation one structurally can adapt to the requirement of high speed vehicle in use mode of operation, can be directly installed on vehicle in use, and adopt advanced generalized resonance, resonance and demodulation, a kind of rail corrugation real-time detecting system carrying out the diagnosis of track ripple mill of spectrum analysis technique, just can overcome the defect of said method, in a creative way under the state of the actual operation operation of vehicle in use, Real-Time Monitoring is carried out to track ripple mill parameter, accomplish that vehicle in use finds rail corrugation problem in the very first time, the very first time differentiates the order of severity, the very first time makes the resolute decision taken safety measures, this is for the deterioration preventing rail corrugation, stop railway and track traffic because rail corrugation seriously cause derailing, the generation of overturning etc. major accident, there is very important effect.
For adapting to subway and urban track traffic fast development, the method that track ripple grinds is measured in a kind of axle box vibration of special proposition, impact information.
Summary of the invention
Technical matters to be solved by this invention is, there is provided a kind of and can greatly reduce labor workload, also do not need the work personnel that are engaged in carry out detecting operation night, be adapted to automatically to carry out when vehicle normally runs, adopt axle box vibration, method that impact information measures track ripple mill.
Technical scheme of the present invention is following realization: one axle box vibrates, impact information measures the method for track ripple mill, its vibration, impact information acquisition device contain be arranged on vehicle in use wheel to the tachogen S on axle, be arranged on wheel to the vibratory impulse detecting sensor A1 on axle two end axles axle box bearing seat, vibratory impulse detecting sensor A2, vehicle-mounted on-line monitoring device JKQ and receive on-line monitoring device JKQ downloading data and carry out the ripple mill ground analysis system DMXT that continues to analyze, described tachogen S, vibratory impulse detecting sensor A1, vibratory impulse detecting sensor A2 is connected with on-line monitoring device JKQ: vibratory impulse detecting sensor A1, the output signal of vibratory impulse detecting sensor A2 all receives the resonance and demodulation passage of the vibration monitoring passage of on-line monitoring device JKQ and the principle of measurement based on generalized resonance, the output signal of tachogen S receives the speed control channel of on-line monitoring device JKQ, on-line monitoring device JKQ tachogen S's or the treated wheel obtained often circle produce N (preferred value is 300-500, more preferred values is 400) individual uniform Pulse Width Control, gather vibratory impulse detecting sensor A1, the vibration acceleration signal a1 of vibratory impulse detecting sensor A2, a2 and impact c1, c2 signal converts based on the principle of measurement of generalized resonance the resonance and demodulation signal g1 obtained through on-line monitoring device JKQ, g2, by on-line monitoring device JKQ, vibration acceleration signal a1 is ground to ripple, a2, resonance and demodulation signal g1, g2 and rotational speed pulse signal ripple grind the depth of convolution, wavelength Vibration identification method and ripple mill wavelength impact the real-time diagnosis that the measurement of track ripple mill information in-vehicle is carried out in recognition methods, analyze, decision-making, or by ripple mill vibration signal a1, a2 of on-line monitoring device JKQ collection, resonance and demodulation signal g1, g2 and rotational speed pulse signal data download to ripple mill ground analysis system DMXT, grind ground analysis system DMXT by ripple and grind vibration acceleration signal a1, a2 to ripple, resonance and demodulation signal g1, g2 and rotational speed pulse signal ripple grind the depth of convolution, wavelength Vibration identification method and ripple mill wavelength impact recognition methods and carry out the diagnosis of track ripple mill information off-line type, analysis, decision-making, warning.
Further, the ripple mill depth of convolution, wavelength Vibration identification method are: by under rotating-speed tracking parallel sampling mode, to record and through the vibration acceleration a1 of the process of vibration monitoring passage, output from axle box vibratory impulse detecting sensor A1, to record and through the vibration acceleration a2 of the process of vibration monitoring passage, output, unified definition is vibration acceleration a from axle box vibratory impulse detecting sensor A2
sc; Speed-frequency fn (t) of different time t is exported, by a of instant t with reference to speed control channel
scvalue a
sct () is carried out double integral process and is obtained amplitude x
js(t)=a
sc(t)/fn
2(t), in formula, fn is the frequency of vehicle wheel rotation; Measure x one by one
jst the method for calculating of the depth of convolution of 1st ~ i in () ~ n ripple mill is: calculate x
jst in (), (i-1) individual positive maximum deducts the value of next negative maximum, obtain the depth of convolution X of i-th ripple mill
i, X
ifor X
1, X
2... X
ix
ngeneral formula; Measure x one by one
jsthe sampling number DB of the wavelength of 1st ~ i in (t) ~ n ripple mill
imethod is: calculate x
jst the sampling period in () during (i-1) individual positive maximum goes sampling period when subtracting next positive maximum to obtain the sampling number DB of i-th ripple mill
i, DB
ifor DB
1, DB
2... DB
idB
ngeneral formula; For the respective carter of axle box vibratory impulse detecting sensor A1 and axle box vibratory impulse detecting sensor A2, the wavelength AL of its 1st ~ i ~ n ripple mill
imethod of calculating be:
AL
i＝π*D*DB
i/N，
In formula, AL
ifor AL
1, AL
2... AL
iaL
ngeneral formula, D is vehicle wheel footpath, and N is that wheel often rotates sampling number corresponding to the cycle T N=1/fn of a week.
Further, ripple mill wavelength impacts recognition methods and is: by under rotating-speed tracking parallel sampling mode, the resonance and demodulation signal g1 of c1 through the process of resonance and demodulation monitoring channel, output is recorded from axle box vibratory impulse detecting sensor A1, record the resonance and demodulation signal g2 of c2 through the process of resonance and demodulation monitoring channel, output from axle box vibratory impulse detecting sensor A2, unified definition is resonance and demodulation signal g
sc; Speed-frequency fn (t) of different time t is exported, by the g of instant t with reference to speed control channel
scvalue g
sct () is carried out the process of ripple mill shock pulse extreme value analysis and is obtained impacting positive extreme value sample g
jst (), measures g one by one
jsthe sampling number DB of the wavelength of 1st ~ i in (t) ~ n ripple mill
imethod is: calculate g
jst the sampling period in () during (i-1) individual positive maximum goes sampling period when subtracting next positive maximum to obtain the sampling number DB of i-th ripple mill
i, DB
ifor DB
1, DB
2... DB ... DB
ngeneral formula; For the respective carter of axle box vibratory impulse detecting sensor A1 and axle box vibratory impulse detecting sensor A2, the wavelength GL of its 1st ~ i ~ n ripple mill
imethod of calculating be:
GL
i＝π*D*DB
i/N，
In formula, GL
ifor GL
1, GL
2... GL
igL
ngeneral formula, D is vehicle wheel footpath, and N is that wheel often rotates sampling number corresponding to the cycle T N=1/fn of a week.
Ripple mill is the wavy wearing and tearing that track occurs, its shape (waveform) have close to sinusoidal waveform, the half-wave sinusoidal waveform sharp-pointed close to crest (high position) had.When vehicle is by ripple mill section, wheel, axle box heave and set can be caused to vibrate: when the wheel of vehicle runs to trough by ripple mill crest, wheel, axle box vibrate downwards; When the wheel of vehicle runs to crest by ripple mill trough, wheel, axle box upwards vibrate.When the speed of a motor vehicle is very fast or wavelength very in short-term, wheel rises to the process of crest from trough nadir and is impacted by the rising edge produced ripple mill; When the depth of convolution is very dark, the speed of a motor vehicle is very low, wheel drops to from crest the trough dropping into ripple mill the process of trough by there is free-falling body to be impacted; Axle box vibratory impulse detecting sensor A1, the vibratory impulse detecting sensor A2 of general use same axle detect ripple grind cause vibration, impact information: the vibration physical quantity of acquisition is vibration acceleration a1, a2, it reflects wheel, acceleration amplitude that axle box heave and set vibrates and acceleration frequency; What impact c1, c2 of obtaining were transformed to resonance and demodulation signal g1, g2 reflection through resonance and demodulation is resonance and demodulation amplitude because above-mentioned reason causes wheel track to produce and frequency of impact.
Certain detects ripple mill with certain depth X in section, if wheel by time contact track all the time, then the amplitude of wheel and axle box just equals the degree of depth X of ripple mill all the time.Amplitude x can be obtained to acceleration/accel a double integral, obtain the amplitude sample being similar to ripple mill pattern in this detection section.
The classics definition of vibration acceleration a and amplitude x is:
for sinusoidal vibration x=Asin (2 π ft), have a (t)=-(2 π f)
2asin (2 π ft).Ripple mill itself does not have the concept of frequency, just as the concept that length itself does not have frequency.Only using the speed V of the wheel ripple mill that is L by length as reference, just there is the frequency f that ripple grinds, i.e. f (t)=V (t)/L (t).Whether in time f (t) change depends on speed V (t) and ripple mill length L (t): if wheel is constant V by the speed in ripple mill section, the wavelength of ripple mill is isometric L, it is then constant for detecting by axle box sensor the frequency obtaining the vibration of ripple mill, i.e. f=V/L; If wheel is time dependent V (t) by the speed in ripple mill section, the wavelength of ripple mill is isometric L, it is then time dependent for detecting by axle box sensor the frequency obtaining the vibration of ripple mill, i.e. f (t)=V (t)/L; If wheel is constant V by the speed in ripple mill section, the length of ripple mill is the L (t) of Length discrepancy, and it is then time dependent for detecting by axle box sensor the frequency obtaining the vibration of ripple mill, i.e. f (t)=V/L (t).
In field of track traffic, actual conditions are speed of a motor vehicle is changes, the wavelength of ripple mill section each ripple mill is also unequal, even if in same ripple mill section and each ripple of this section mill length is isometric, (V1 is set to the different speed of a motor vehicle, V2) by time the vibration signal that records ripple mill frequency (being respectively f1=V1/L, f2=V2/L) that reacts also be different.In addition, from axle box vibratory impulse detecting sensor A1, the vibration that vibratory impulse detecting sensor A2 records, impact signal obtains under tracking sampling mode, tracking sampling vibrates, the ripple mill length that impinge on sample reflects is relevant with sampling number, although the time gap between every sampling point is different, but distance interval is identical, even if the sampling number corresponding at the different speed of a motor vehicle inferior long wave mill is also identical, admittedly can by vibration acceleration a double integral be measure each ripple mill sampling number DB after amplitude x after calculate wavelength L, also wavelength L is calculated after can measuring each ripple mill sampling number DB by impinge on sample, because DB and the speed of a motor vehicle have nothing to do, different frequency f1 is produced under considering the different speed of a motor vehicle, the impact that f2 calculates wavelength.Therefore rotating-speed tracking detects vibration and impact has preceence.
But, produce different ripple mill frequency f 1, f2 under the different speed of a motor vehicle and but the expression of the vibration acceleration amplitude recorded from axle box vibratory impulse detecting sensor A1, vibratory impulse detecting sensor A2 had an impact.According to a (t)=-(2 π f)
2asin (2 π ft), the vibration acceleration amplitude of measuring point | a (t) | grind amplitude with ripple | x (t) | pass is | a (t) |=(2 π f)
2| x (t) |, the known vibration acceleration amplitude that records from axle box vibratory impulse detecting sensor A1, vibratory impulse detecting sensor A2 and ripple grind frequency f
2be directly proportional, because of in rotating-speed tracking situation, s-f f is directly proportional to the speed-frequency fn of wheel, Gu | a (t) | with rotating speed fn
2be directly proportional.
Suppose that obtaining ripple mill vibration acceleration signal by the actual measurement of axle box sensor is a
sc, the ripple mill amplitude signal x obtained by Double Integral Calculation
jsrepresent, the definition according to classics has: x
js(t)=∫ ∫ a
sct () dtdt, for sinusoidal vibration a
sct ()=Asin (2 π ft), has
Under rotating-speed tracking sampling condition, from the vibration acceleration a that axle box vibratory impulse detecting sensor A1, vibratory impulse detecting sensor A2 record
sc, for different vehicle wheel rotational speed frequency f n, a
sct () is modified to a
sc(t)/fn
2t () Integral Processing obtains amplitude x
js(t), one by one survey calculation x
jst in (), first positive maximum deducts the value of next negative maximum, obtain each ripple mill depth of convolution X1 ~ Xn, rotating speed fn (t) is obtained by tachogen S.The method of classical evaluation track ripple mill identifies the depth of convolution and in addition limit value, and being such as greater than 0.4mm then needs polishing orbit.The depth of convolution of each ripple mill that this method gained is fixed provides data for evaluating track ripple mill situation.For when wavelength is relatively very short or the speed of a motor vehicle is very fast, the little depth of convolution but causes very large vibration acceleration and destructive force, therefore, according to acceleration/accel a1, a2, each section can also be calculated and grind the acceleration/accel absolute average, acceleration peak value, accelerated speed effective value etc. that cause to the ripple of track and submit to the comprehensive evaluation of ripple mill to car, wheel, rail hazard rating.
When the speed of a motor vehicle is very fast or wavelength very in short-term, wheel rises to the impact that will produce the upthrow side to ripple mill the process of crest from trough; When the depth of convolution is very dark, the speed of a motor vehicle is very low, wheel drops to from crest the trough dropping into ripple mill the process of trough by there is free-falling body to be impacted; Axle box vibratory impulse detecting sensor A1, the vibratory impulse detecting sensor A2 of general use same axle detect ripple and grinds the impact information caused, and what impact c1, c2 of obtaining were transformed to that resonance and demodulation signal g1, g2 reflect through resonance and demodulation is resonance and demodulation amplitude because above-mentioned reason causes wheel track to produce and frequency of impact.The mechanism of this impact contains that the speed of a motor vehicle is fast, the depth of convolution is dark and short three characteristic factors of wavelength; This impact means that Wheel Rail Vibration impact conditions worsens: at wheel by producing 1 group of (comprising 1 time or more) impact during ripple mill.Detected the output information g impacted by resonance and demodulation, just contain the consequence of above-mentioned 3 features, namely the sampling number between this i-th-1 to i group of impacting is DBi.
If the ripple mill of track only has vibration and do not impact caused by the above-mentioned speed of a motor vehicle, the depth of convolution and wavelength three factors, then the harm of tracking, wheel, car is still low; And if also cause impact, then endanger increase, therefore for i-th ripple mill of the same section of each track, same position, grind the depth of convolution, wavelength Vibration identification method and ripple mill wavelength by ripple and impact the wavelength AL that recognition methods obtains
iand GL
i, average, obtain mean wavelength L
i=(AL
i+ GL
i)/2; If Li/Ali<0.5, then ripple mill harm intensity Q i=0, characterizes ripple mill and causes vibration but not yet cause obvious impact; If Li/ALi>0.5 and Li/GLi>2, then ripple mill harm intensity Q i=1, characterizes ripple mill and causes and vibrate and cause obvious impact; If 1.1>Li/ALi>0.9 and 1.1>Li/GLi>0.9, then ripple mill harm intensity is Qi=2, characterizes ripple mill and not only causes vibration, and cause thump; L in formula
il
1, L
2... L
il
ngeneral formula; If Qi=2, decision-making ripple mill length is Li=(AL
i+ GL
i)/2, otherwise, then decision-making ripple mill length Li=Ali;
If Q=is (Q1+Q2+ ... + Qi+ ... + Qn)/n>1, namely the ripple mill harm intensity more than half of n the ripple mill in this section reaches 2, then send ripple mill and report to the police.
Damage vibration that the vibration produced with rail contact and impact, axle box bearing inner body fault produce and the detection analysis that impulsive disturbance track ripple grind to prevent the fault of wheel tread itself, usual way is: ensure the wheel tread that the axle box of installation axle box vibratory impulse detecting sensor A1, axle box vibratory impulse detecting sensor A2 is corresponding and bearing state good; Further support method is, the vibration obtained described detection, impact information are intended to the filtering of rejecting tread, bearing fault information; It is so the mechanism that can realize is: the rotating speed fn of tread, bearing fault information and wheel has strict functional relation.Shown in accompanying drawing 4, be namely the impact resonance and demodulation signal (up waveform) and the vibration signal (downward traveling waveform) that detect certain section of track obtained simultaneously, visible: the impact when vibrating large is also large, the crest of the ripple mill waveform in vibration signal and the crest one_to_one corresponding impacting resonance and demodulation waveform, can by acceleration/accel maxim (g) in both this ripple of combined calculation mill sections, effective value (g), earthquake intensity (mm/s), most long wave mill (mm), the maximum depth of convolution (mm), most shortwave mill (mm), the minimum depth of convolution (mm), and play (beginning) kilometer post (km), (end) be kilometer post (km) only, the initial rotating speed (r/min) detected, the termination rotating speed (r/min) detected, information between the station detected, the time etc. of sampling.
The present invention utilizes vibration under rotating-speed tracking sample mode, ripple mill information rule expressed by impact signal, " mechanical fault diagnosis of generalized resonance and resonance and demodulation " is developed, is applied to the track ripples such as subway and grinds detection field.
The present invention utilizes axle box vibration, impact information, realize the measurement of track ripple mill wavelength, the depth of convolution, survey chi relative to ripple mill, ripple mill waggon is measured and track checking car metering system, can with speed of a motor vehicle Natural matching of normally operating, greatly reduce labor workload, do not need work business personnel night work, reach the object measuring ripple mill in real time yet.
Accompanying drawing explanation
Fig. 1 is the apparatus structure schematic diagram realizing the method that track ripple mill is measured by axle box vibration, impact information of the present invention;
Fig. 2 is the ripple mill diagnosis of No. 5 line uplink segment K13+334 ~ K13+379 in Guangzhou through ripple mill ground analysis system DMXT diagnosis, analysis, decision-making output;
Fig. 3 is the ripple mill diagnosis of No. 5 line uplink segment K9+737 ~ K9+783 in Guangzhou through ripple mill ground analysis system DMXT diagnosis, analysis, decision-making output;
Fig. 4 detects the impact resonance and demodulation signal in certain section of track obtained and vibration signal and automatically analyzing message simultaneously.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment
With reference to Fig. 1, the present invention vibrates with axle box, impact information measures the method for track ripple mill, its vibration, impact information acquisition device contain be arranged on vehicle in use wheel to the tachogen S on axle, be arranged on wheel to the vibratory impulse detecting sensor A1 on axle two end axles axle box bearing seat, vibratory impulse detecting sensor A2, vehicle-mounted on-line monitoring device JKQ and receive on-line monitoring device JKQ downloading data and carry out the ripple mill ground analysis system DMXT that continues to analyze, described tachogen S, vibratory impulse detecting sensor A1, vibratory impulse detecting sensor A2 is connected with on-line monitoring device JKQ: vibratory impulse detecting sensor A1, the output signal of vibratory impulse detecting sensor A2 all receives the resonance and demodulation passage of the vibration monitoring passage of on-line monitoring device JKQ and the principle of measurement based on generalized resonance, the output signal of tachogen S receives the speed control channel of on-line monitoring device JKQ, on-line monitoring device JKQ tachogen S's or the treated wheel obtained often circle produce N (N is 400) individual uniform Pulse Width Control, gather vibratory impulse detecting sensor A1, the vibration acceleration signal a1 of vibratory impulse detecting sensor A2, a2 and impact c1, c2 signal converts based on the principle of measurement of generalized resonance the resonance and demodulation signal g1 obtained through on-line monitoring device JKQ, g2, by on-line monitoring device JKQ, vibration acceleration signal a1 is ground to ripple, a2, resonance and demodulation signal g1, g2 and rotational speed pulse signal ripple grind the depth of convolution, wavelength Vibration identification method and ripple mill wavelength impact the real-time diagnosis that the measurement of track ripple mill information in-vehicle is carried out in recognition methods, analyze, decision-making, or by ripple mill vibration signal a1, a2 of on-line monitoring device JKQ collection, resonance and demodulation signal g1, g2 and rotational speed pulse signal data download to ripple mill ground analysis system DMXT, grind ground analysis system DMXT by ripple and grind vibration acceleration signal a1, a2 to ripple, resonance and demodulation signal g1, g2 and rotational speed pulse signal ripple grind the depth of convolution, wavelength Vibration identification method and ripple mill wavelength impact recognition methods and carry out the diagnosis of track ripple mill information off-line type, analysis, decision-making, warning.
The ripple mill depth of convolution, wavelength Vibration identification method are: by under rotating-speed tracking parallel sampling mode, to record and through the vibration acceleration a1 of the process of vibration monitoring passage, output from axle box vibratory impulse detecting sensor A1, to record and through the vibration acceleration a2 of the process of vibration monitoring passage, output, unified definition is vibration acceleration a from axle box vibratory impulse detecting sensor A2
sc; Speed-frequency fn (t) of different time t is exported, by a of instant t with reference to speed control channel
scvalue a
sct () is carried out Integral Processing and is obtained amplitude x
js(t)=a
sc(t)/fn
2(t), in formula, fn is the frequency of vehicle wheel rotation; Measure x one by one
jst the method for calculating of the depth of convolution of 1st ~ i in () ~ n ripple mill is: calculate x
jst in (), (i-1) individual positive maximum deducts the value of next negative maximum, obtain the depth of convolution X of i-th ripple mill
i, X
ifor X
1, X
2... X
ix
ngeneral formula; Measure x one by one
jsthe sampling number DB of the wavelength of 1st ~ i in (t) ~ n ripple mill
imethod is: calculate x
jst the sampling period in () during (i-1) individual positive maximum goes sampling period when subtracting next positive maximum to obtain the sampling number DB of i-th ripple mill
i, DB
ifor DB
1, DB
2... DB
idB
ngeneral formula; For the respective carter of axle box vibratory impulse detecting sensor A1 and axle box vibratory impulse detecting sensor A2, the wavelength AL of its 1st ~ i ~ n ripple mill
imethod of calculating be:
AL
i＝π*D*DB
i/N，
In formula, AL
ifor AL
1, AL
2... AL
iaL
ngeneral formula, D is vehicle wheel footpath, and N is that wheel often rotates sampling number corresponding to the cycle T N=1/fn of a week.
Ripple mill wavelength impacts recognition methods and is: by under rotating-speed tracking parallel sampling mode, the resonance and demodulation signal g1 of c1 through the process of resonance and demodulation monitoring channel, output is recorded from axle box vibratory impulse detecting sensor A1, record the resonance and demodulation signal g2 of c2 through the process of resonance and demodulation monitoring channel, output from axle box vibratory impulse detecting sensor A2, unified definition is resonance and demodulation signal g
sc; Speed-frequency fn (t) of different time t is exported, by the g of instant t with reference to speed control channel
scvalue g
sct () is carried out the process of ripple mill shock pulse extreme value analysis and is obtained impacting positive extreme value sample g
jst (), measures g one by one
jsthe sampling number DB of the wavelength of 1st ~ i in (t) ~ n ripple mill
imethod is: calculate g
jst the sampling period in () during (i-1) individual positive maximum goes sampling period when subtracting next positive maximum to obtain the sampling number DB of i-th ripple mill
i, DB
ifor DB
1, DB
2... DB
idB
ngeneral formula; For the respective carter of axle box vibratory impulse detecting sensor A1 and axle box vibratory impulse detecting sensor A2, the wavelength GL of its 1st ~ i ~ n ripple mill
imethod of calculating be:
GL
i＝π*D*DB
i/N，
In formula, GL
ifor GL
1, GL
2... GL
igL
ngeneral formula, D is vehicle wheel footpath, and N is that wheel often rotates sampling number corresponding to the cycle T N=1/fn of a week.
For i-th ripple mill of the same section of each track, same position, grind the depth of convolution, wavelength Vibration identification method and ripple mill wavelength by ripple and impact the wavelength AL that recognition methods obtains
iand GL
i, average, obtain mean wavelength L
i=(AL
i+ GL
i)/2; If Li/Ali<0.5, then ripple mill harm intensity Q i=0, characterizes ripple mill and causes vibration but not yet cause obvious impact; If Li/ALi>0.5 and Li/GLi>2, then ripple mill harm intensity Q i=1, characterizes ripple mill and causes and vibrate and cause obvious impact; If 1.1>Li/ALi>0.9 and 1.1>Li/GLi>0.9, then ripple mill harm intensity is Qi=2, characterizes ripple mill and not only causes vibration, and cause thump; L in formula
il
1, L
2... L
il
ngeneral formula; If Qi=2, decision-making ripple mill length is Li=(AL
i+ GL
i)/2, otherwise, then decision-making ripple mill length Li=Ali;
If Q=is (Q1+Q2+ ... + Qi+ ... + Qn)/n>1, namely the ripple mill harm intensity more than half of n the ripple mill in this section reaches 2, then send ripple mill and report to the police.
Application Example
As shown in Figure 2, be through ripple mill ground analysis system DMXT diagnosis, analyze, the showing interface of certain ripple mill diagnosis of No. 5 line uplink segment K13+334 ~ K13+379 in Guangzhou that decision-making exports.Vibratory impulse detecting sensor A1 or A2 records the ripple mill vibration acceleration of this segment, impact resonance and demodulation information, through ripple mill ground analysis system DMXT process, it is DBi=16 sampling point that the displacement waveform of lower curve shows certain ripple mill trough spacing, the impact resonance and demodulation SV waveform disclosing solution mill trough spacing of top curve is DBi=16 sampling point, according to Li=π * D*DBi/N, in formula, wheel diameter D=715mm, the sampling number N=200 that wheel often circles, this ripple of this segment mill wavelength is Li=3.14*715mm*16/200=179.6mm, the depth of convolution is Xi=0.19mm.
As shown in Figure 3, be through ripple mill ground analysis system DMXT diagnosis, analyze, the showing interface of certain ripple mill diagnosis of No. 5 line uplink segment K9+737 ~ K9+783 in Guangzhou that decision-making exports.Vibratory impulse detecting sensor A1 or A2 records the ripple mill vibration acceleration of this segment, impact resonance and demodulation information, through ripple mill ground analysis system DMXT process, it is DBi=15 sampling point that the displacement waveform of lower curve shows certain ripple mill trough spacing, the impact resonance and demodulation SV waveform disclosing solution mill trough spacing of top curve is DBi=15 sampling point, according to Ln=π * D*DBn/N, this segment ripple mill wavelength is Li=3.14*715mm*15/200=168.4mm, the depth of convolution is Xi=0.19mm, in formula, wheel diameter D=715mm, the sampling number N=200 that wheel often circles.
Claims (4)
1. one kind is vibrated with axle box, impact information measures the method for track ripple mill, its vibration, impact information acquisition device contain be arranged on vehicle in use wheel to the tachogen S on axle, be arranged on wheel to the vibratory impulse detecting sensor A1 on axle two end axles axle box bearing seat, vibratory impulse detecting sensor A2, vehicle-mounted on-line monitoring device JKQ and receive on-line monitoring device JKQ downloading data and carry out the ripple mill ground analysis system DMXT that continues to analyze, described tachogen S, vibratory impulse detecting sensor A1, vibratory impulse detecting sensor A2 is connected with on-line monitoring device JKQ: vibratory impulse detecting sensor A1, the output signal of vibratory impulse detecting sensor A2 all receives the resonance and demodulation passage of the vibration monitoring passage of on-line monitoring device JKQ and the principle of measurement based on generalized resonance, the output signal of tachogen S receives the speed control channel of on-line monitoring device JKQ, on-line monitoring device JKQ tachogen S's or the treated wheel obtained often circle produce N number of uniform Pulse Width Control, gather vibratory impulse detecting sensor A1, the vibration acceleration signal a1 of vibratory impulse detecting sensor A2, a2 and impact c1, c2 signal converts based on the principle of measurement of generalized resonance the resonance and demodulation signal g1 obtained through on-line monitoring device JKQ, g2, it is characterized in that, by on-line monitoring device JKQ, vibration acceleration signal a1 is ground to ripple, a2, resonance and demodulation signal g1, g2 and rotational speed pulse signal ripple grind the depth of convolution, wavelength Vibration identification method and ripple mill wavelength impact the real-time diagnosis that the measurement of track ripple mill information in-vehicle is carried out in recognition methods, analyze, decision-making, or by ripple mill vibration signal a1, a2 of on-line monitoring device JKQ collection, resonance and demodulation signal g1, g2 and rotational speed pulse signal data download to ripple mill ground analysis system DMXT, grind ground analysis system DMXT by ripple and grind vibration acceleration signal a1, a2 to ripple, resonance and demodulation signal g1, g2 and rotational speed pulse signal ripple grind the depth of convolution, wavelength Vibration identification method and ripple mill wavelength impact recognition methods and carry out the diagnosis of track ripple mill information off-line type, analysis, decision-making, warning.
2. the method for track ripple mill is measured in axle box vibration according to claim 1, impact information, it is characterized in that, the ripple mill depth of convolution, wavelength Vibration identification method are: by under rotating-speed tracking parallel sampling mode, to record and through the vibration acceleration a1 of the process of vibration monitoring passage, output from axle box vibratory impulse detecting sensor A1, to record and through the vibration acceleration a2 of the process of vibration monitoring passage, output, unified definition is vibration acceleration a from axle box vibratory impulse detecting sensor A2
sc; With reference to speed-frequency fn (t) exporting different time t from speed control channel, by a of instant t
scvalue a
sct () is carried out double integral process and is obtained amplitude x
js(t)=a
sc(t)/fn
2(t), in formula, fn is the frequency of vehicle wheel rotation; Measure x one by one
jst the method for calculating of the depth of convolution of 1st ~ i in () ~ n ripple mill is: calculate x
jst in (), (i-1) individual positive maximum deducts the value of next negative maximum, obtain the depth of convolution X of i-th ripple mill
i, X
ifor X
1, X
2... X
ix
ngeneral formula; Measure x one by one
jsthe sampling number DB of the wavelength of 1st ~ i in (t) ~ n ripple mill
imethod is: calculate x
jst the sampling period in () during (i-1) individual positive maximum goes sampling period when subtracting next positive maximum to obtain the sampling number DB of i-th ripple mill
i, DB
ifor DB
1, DB
2... DB
idB
ngeneral formula; For the respective carter of axle box vibratory impulse detecting sensor A1 and axle box vibratory impulse detecting sensor A2, the wavelength AL of its 1st ~ i ~ n ripple mill
imethod of calculating be:
AL
i＝π*D*DB
i/N，
In formula, AL
ifor AL
1, AL
2... AL
iaL
ngeneral formula, D is vehicle wheel footpath, and N is that wheel often rotates sampling number corresponding to the cycle T N=1/fn of a week.
3. the method for track ripple mill is measured in axle box vibration according to claim 2, impact information, it is characterized in that, ripple mill wavelength impacts recognition methods and is: by under rotating-speed tracking parallel sampling mode, the resonance and demodulation signal g1 of c1 through the process of resonance and demodulation monitoring channel, output is recorded from axle box vibratory impulse detecting sensor A1, record the resonance and demodulation signal g2 of c2 through the process of resonance and demodulation monitoring channel, output from axle box vibratory impulse detecting sensor A2, unified definition is resonance and demodulation signal g
sc; With reference to speed-frequency fn (t) exporting different time t from speed control channel, by the g of instant t
scvalue g
sct () is carried out the process of ripple mill shock pulse extreme value analysis and is obtained impacting positive extreme value sample g
jst (), measures g one by one
jsthe sampling number DB of the wavelength of 1st ~ i in (t) ~ n ripple mill
imethod is: calculate g
jst the sampling period in () during (i-1) individual positive maximum goes sampling period when subtracting next positive maximum to obtain the sampling number DB of i-th ripple mill
i, DB
ifor DB
1, DB
2... DB
idB
ngeneral formula; For the respective carter of axle box vibratory impulse detecting sensor A1 and axle box vibratory impulse detecting sensor A2, the wavelength GL of its 1st ~ i ~ n ripple mill
imethod of calculating be:
GL
i＝π*D*DB
i/N，
In formula, GL
ifor GL
1, GL
2... GL
igL
ngeneral formula, D is vehicle wheel footpath, and N is that wheel often rotates sampling number corresponding to the cycle T N=1/fn of a week.
4. the method for track ripple mill is measured in axle box vibration according to claim 3, impact information, it is characterized in that: for i-th ripple mill of the same section of each track, same position, grind the depth of convolution, wavelength Vibration identification method and ripple mill wavelength by ripple and impact the wavelength AL that recognition methods obtains
iand GL
i, average, obtain mean wavelength L
i=(AL
i+ GL
i)/2; If Li/Ali<0.5, then ripple mill harm intensity Q i=0, characterizes this ripple mill and causes vibration but not yet cause obvious impact; If Li/ALi>0.5 and Li/GLi>2, then ripple mill harm intensity Q i=1, characterizes this ripple mill and causes and vibrate and cause obvious impact; If 1.1>Li/ALi>0.9 and 1.1>Li/GLi>0.9, then ripple mill harm intensity is Qi=2, characterizes this ripple mill and not only causes vibration, and cause thump; L in formula
il
1, L
2... L
il
ngeneral formula; If Qi=2, decision-making ripple mill length is Li=(AL
i+ GL
i)/2, otherwise, then decision-making ripple mill length Li=Ali; If Q=is (Q1+Q2+ ... + Qi+ ... + Qn)/n>1, namely the ripple mill harm intensity more than half of n the ripple mill in this section reaches 2, then send ripple mill and report to the police.
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