CN102004169B - Off-pulse fault diagnosing and velocity reading correcting method for photoelectric speed sensor of train - Google Patents
Off-pulse fault diagnosing and velocity reading correcting method for photoelectric speed sensor of train Download PDFInfo
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- CN102004169B CN102004169B CN2010102816919A CN201010281691A CN102004169B CN 102004169 B CN102004169 B CN 102004169B CN 2010102816919 A CN2010102816919 A CN 2010102816919A CN 201010281691 A CN201010281691 A CN 201010281691A CN 102004169 B CN102004169 B CN 102004169B
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Abstract
The invention discloses an off-pulse fault diagnosing and velocity reading correcting method for a train photoelectric speed sensor. The method comprises the following steps of: measuring the running speed of a train by using a photoelectric speed sensor; smoothing the running speed of the train by a Holt method; when the train passes through a transponder near a rail, acquiring the positioning of the train, and calculating a running distance of the train; and then estimating and correcting the off-pulse amount of the train photoelectric speed sensor by comparing the running distance calculated by the transponder with the running distance calculated by the photoelectric speed sensor. In the method, the conventional rail facilities and train equipment are used, excessive additional investment is not needed, the aims of monitoring the off-pulse fault of the train photoelectric speed sensor and correcting the velocity reading can be fulfilled exactly and effectively, and the safe running of the train is guaranteed.
Description
Technical field
The present invention relates to rail vehicle detection technique field, relate in particular to a kind of train-installed light electricity velocity sensor and fall pulse fault diagnosis and velocity readings bearing calibration.
Background technology
The security of train operation receives widely always and paying close attention to.And train-installed speed pickup conduct provides the equipment of velocity information, and its reliability is directly related with the safety of train operation.In use, performance degradation takes place because receiving the influence of external environment condition and train self-operating in speed pickup unavoidably.The speed pickup that adopts ON TRAINS at present mainly is light electricity velocity sensor (photoelectric code disk).The present invention then relates to and a kind ofly falls pulse fault diagnosis and velocity readings method of correcting to train-installed light electricity velocity sensor.
Train-installed light electricity velocity sensor is installed on the train wheel.When train operation, it converts the velocity of rotation of train wheel into electric impulse signal through grating and photovoltaic principals, after Computer Processing, obtains the velocity information of train operation.But owing to be given a shock the influence of unfavorable factors such as impact and greasy dirt obstruction, its performance possibly degenerated along with the growth of service time in actual use.Under identical travelling speed, the electric pulse number that the unit interval inner sensor obtains may reduce, so the velocity amplitude that truck-mounted computer obtains can be less than normal.If the driver controls train operation according to velocity amplitude less than normal, then possibly cause the train overspeed, be unfavorable for the safe operation of train.If can monitor, and utilize the velocity readings of correcting measuring as a result of monitoring, then can greatly improve the security of train operation the pulse fault of falling of train-installed light electricity velocity sensor.But also lacking effective means now realizes this goal.
Summary of the invention
The objective of the invention is deficiency, provide a kind of train-installed light electricity velocity sensor to fall pulse fault diagnosis and velocity readings bearing calibration to prior art.
The step that train-installed light electricity velocity sensor falls pulse fault diagnosis and velocity readings bearing calibration is following:
1) in train travelling process; Through train-installed light electricity velocity sensor, measure the travelling speed
of train
2) adopt the holter method that train running speed is carried out smoothing processing;
3) according to the sampling period T of light electricity velocity sensor and the train running speed after smoothing processing
according to formula
calculate in each sampling time section travel distance
and with the travel distance addition in each time period, total walking distance
of train effective current time
4) when the transponder of train process rail side, communicate, obtain the accurate locating information of train, and will deduct initial position location, extrapolate total walking distance L of train current time accurately by the train current location that transponder provides with the other transponder of rail;
5) total walking distance
step 4) of the train current time that obtains according to step 3) extrapolates accurately that total walking distance L and the light electricity velocity sensor shadow shield of train current time should have raster count N, and what estimation obtained train-installed light electricity velocity sensor according to formula
falls umber of pulse
6) According to the train car off the photoelectric speed sensor pulses
According to the formula
obtained after correction of the running speed of the train
Described in train travelling process; Through train-installed light electricity velocity sensor; The step that measures the travelling speed of train is: beginning from the initial alignment position, during train operation, is in the sampling period of T a length; Train operation makes wheel drive the shadow shield motion; Many gratings are arranged on the shadow shield, and it rotates the light path of discontinuity blocking-up from the light source to the sensor, thereby forms
individual light pulse; After photoelectric sensor receives light pulse; Corresponding light pulse is converted to
individual electric pulse, k=1 wherein, 2; 3; ... be the discrete time index, the current travelling speed
that adopts following formula train effective wherein, D is the train wheel diameter; N is a due raster count on the shadow shield, and T is the sampling period.
Described employing holter method is carried out the smoothing processing step to train running speed and is: train running speed
is carried out obtaining first train running speed that the train running speed
after smoothing processing obtains for sampling after the smoothing processing; Be k=1; Then
then passes through wherein
speed linearity growth factor for estimating of formula
calculating
for k=2; For k>=3; Then according to following formula calculate after smoothing processing train running speed
and the linear growth factor
promptly in
formula a and b be the coefficient of holter method; Span is (0; 1), value is neglected actual needs greatly and is decided.
The present invention according to the principle of work of train-installed light electricity velocity sensor and fall pulsed quantity and speed and distance between relation design light electricity velocity sensor fall the pulse fault monitoring method.Its basic thought is when there is to fall the pulse fault in train-installed light electricity velocity sensor, and the speed that measures and the speed of actual motion there are differences, thereby the travel distance that causes calculating according to measuring speed also has deviation with actual value.And the other transponder of rail can provide Train Location information comparatively accurately, through comparing the pulsed quantity that falls that two distances can obtain light electricity velocity sensor.
The present invention utilizes existing orbital facilities and train-installed equipment, need not too much extra investment, can realize accurately and effectively the monitoring of falling the pulse fault of train-installed light electricity velocity sensor and the purpose of correction rate reading, guarantees the safe operation of train.
Description of drawings
Fig. 1 falls the process flow diagram of pulsed quantity monitoring method for train-installed light electricity velocity sensor;
Fig. 2 is the process flow diagram of train-installed light electricity velocity sensor velocity readings bearing calibration;
Fig. 3 is the result of implementation of train-installed light electricity velocity sensor velocity readings bearing calibration.
Embodiment
Like accompanying drawing 1, shown in 2, the step that train-installed light electricity velocity sensor falls pulse fault diagnosis and velocity readings bearing calibration is following:
1) in train travelling process; Through train-installed light electricity velocity sensor, measure the travelling speed
of train
2) adopt the holter method that train running speed is carried out smoothing processing;
3) according to the sampling period T of light electricity velocity sensor and the train running speed after smoothing processing
according to formula
calculate in each sampling time section travel distance
and with the travel distance addition in each time period, total walking distance
of train effective current time
4) when the transponder of train process rail side, communicate, obtain the accurate locating information of train, and will deduct initial position location, extrapolate total walking distance L of train current time accurately by the train current location that transponder provides with the other transponder of rail;
5) total walking distance
step 4) of the train current time that obtains according to step 3) extrapolates accurately that total walking distance L and the light electricity velocity sensor shadow shield of train current time should have raster count N, and what estimation obtained train-installed light electricity velocity sensor according to formula
falls umber of pulse
6) According to the train car off the photoelectric speed sensor pulses
according to the formula
obtained after correction of the running speed of the train
Described in train travelling process; Through train-installed light electricity velocity sensor; The step that measures the travelling speed of train is: beginning from the initial alignment position, during train operation, is in the sampling period of T a length; Train operation makes wheel drive the shadow shield motion; Many gratings are arranged on the shadow shield, and it rotates the light path of discontinuity blocking-up from the light source to the sensor, thereby forms
individual light pulse; After photoelectric sensor receives light pulse; Corresponding light pulse is converted to
individual electric pulse, k=1 wherein, 2; 3; ... be the discrete time index, the travelling speed
that adopts following formula train effective wherein, D is the train wheel diameter; N is a due raster count on the shadow shield, and T is the sampling period.
Described employing holter method is carried out the smoothing processing step to train running speed and is: train running speed
is carried out obtaining first train running speed that the train running speed
after smoothing processing obtains for sampling after the smoothing processing; Be k=1; Then
then passes through wherein
speed linearity growth factor for estimating of formula
calculating
for k=2; For k>=3; Then according to following formula calculate after smoothing processing train running speed
and the linear growth factor
promptly in
formula a and b be the coefficient of holter method; Span is (0; 1), value is neglected actual needs greatly and is decided.
Embodiment:
To three kinds of different trains ruuning situations, described method is applied to monitor train-installed light electricity velocity sensor.These three kinds of situation are respectively: situation 1, and train passes through this section running distance with constant speed 200km/h; Situation 2, train are thought the 200km/h initial velocity, with 0.04m/s
2Be acceleration, through this section running distance; Situation 3, train is with the constant speed of the 200km/h running distance through preceding 500m, again with 0.04m/s
2Acceleration through remaining distance.Be directed against eight kinds in each case again and different fallen the pulse fault, concrete steps of the present invention are following:
1. adopt light electricity velocity sensor to gather the speed of train; Photoelectricity biography speed sensor adopts the shadow shield of raster count N=72 to carry out impulse sampling in this process; Sampling period T=0.1s; Note umber of pulse
that each sampling obtains and utilize the travelling speed of formula
train effective, wherein the wheel diameter D=0.89m of train.
2. the travelling speed to the train that measures adopts the holter method to carry out smoothing processing; Difference according to the discrete time index; Use different formula that the travelling speed of train is handled; To in processing procedure, making a=0.15, b=0.015 obtains the train running speed after smoothing processing
3. total walking of calculating current time according to the train running speed after smoothing processing and sampling time is apart from
4. during through the other transponder of rail, obtain the accurate position location of train at train, and calculate to such an extent that obtain total walking distance L=3000m of accurate train.
5. total walking distance
of the train current time that will obtain by step 3 and total walking distance L of the accurate train that obtains by step 4; In the substitution formula
, calculate light electricity velocity sensor to fall pulsed quantity
diagnostic result as shown in table 1:
Table 1 falls pulse fault diagnosis result table
Can find out that from monitoring result in different trains ruuning situation and different falling under the pulse situation, this method all can effectively be monitored the pulsed quantity that falls of train-installed light electricity velocity sensor, thus the basis of laying for the velocity correction of train.
Adopt the velocity correction method that the travelling speed that measures train is proofreaied and correct below.At first, train earlier with the 200km/h constant speed be the range ability of L=3000m through a segment length.In this section walking process, adopt above-mentioned monitoring method to obtain the pulsed quantity that falls of light electricity velocity sensor
In ensuing driving process, train is an initial velocity with 200km/h, with 0.04m/s
2For acceleration gives it the gun, according to formula
Travelling speed to train is proofreaied and correct, and correcting result is as shown in Figure 3.
Can find out that from correcting result do not carrying out timing, the travelling speed of the train that measures and actual motion speed have than big-difference, this will threaten train traffic safety.The travelling speed of the train after the correction and actual motion speed are close, and can guarantee the security of operation of train.
Claims (3)
1. a train-installed light electricity velocity sensor falls pulse fault diagnosis and velocity readings bearing calibration, it is characterized in that its step is following:
1) in train travelling process; Through train-installed light electricity velocity sensor, measure the travelling speed
of train
2) adopt the holter method that train running speed is carried out smoothing processing;
3) according to the sampling period T of train-installed light electricity velocity sensor and the train running speed after smoothing processing
according to formula
calculate in each sampling time section travel distance
and with the travel distance addition in each time period, total walking distance
of train effective current time
4) when the transponder of train process rail side, communicate, obtain the accurate locating information of train, and will deduct initial position location, extrapolate total walking distance L of train current time accurately by the train current location that transponder provides with the other transponder of rail;
5) total walking distance
step 4) of the train current time that obtains according to step 3) extrapolates accurately that the total walking distance L and the train-installed light electricity velocity sensor shadow shield of train current time should have raster count N, falls umber of pulse
according to what formula
estimated to obtain train-installed light electricity velocity sensor
2. a kind of train-installed light electricity velocity sensor according to claim 1 falls pulse fault diagnosis and velocity correction method; It is characterized in that described in train travelling process; Through train-installed light electricity velocity sensor; The step that measures the travelling speed of train is: begin from the initial alignment position; During train operation; A length is in the sampling period of T, and train operation makes wheel drive the shadow shield motion, and many gratings are arranged on the shadow shield; It rotates the light path of discontinuity blocking-up from light source to train-installed light electricity velocity sensor; Thereby form
individual light pulse, after train-installed light electricity velocity sensor receives light pulse, corresponding light pulse is converted to
individual electric pulse; K=1 wherein; 2,3 ... be the discrete time index; The travelling speed
that adopts following formula train effective wherein; D is the train wheel diameter, and N is a due raster count on the shadow shield, and T is the sampling period.
3. a kind of train-installed light electricity velocity sensor according to claim 1 falls pulse fault diagnosis and velocity correction method, it is characterized in that described employing holter method carries out the smoothing processing step to train running speed and be: to train running speed
Carry out obtaining the train running speed after smoothing processing after the smoothing processing
First train running speed that obtains for sampling, i.e. k=1, then
For k=2, then pass through formula
Calculate
Wherein
Be the linear growth factor of the speed of estimating; For k>=3, then calculate the train running speed after smoothing processing according to following formula
With the linear growth factor
Promptly
A and b are the coefficient of holter method in the formula, and span is (0,1), and value is neglected actual needs greatly and decided.
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CN2010102816919A CN102004169B (en) | 2010-09-10 | 2010-09-10 | Off-pulse fault diagnosing and velocity reading correcting method for photoelectric speed sensor of train |
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CN2010102816919A CN102004169B (en) | 2010-09-10 | 2010-09-10 | Off-pulse fault diagnosing and velocity reading correcting method for photoelectric speed sensor of train |
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CN102004169A CN102004169A (en) | 2011-04-06 |
CN102004169B true CN102004169B (en) | 2012-01-25 |
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Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103578342A (en) * | 2013-03-22 | 2014-02-12 | 柳州铁道职业技术学院 | Urban rail transit vehicle-mounted locating experimental device |
CN104835102B (en) * | 2015-05-05 | 2020-10-27 | 北京交通大学 | Train speed measurement scheme evaluation method and device |
CN108663534B (en) * | 2017-03-30 | 2020-05-22 | 比亚迪股份有限公司 | Train and speed measuring method and system thereof |
CN110196065A (en) * | 2019-06-04 | 2019-09-03 | 北京磁浮交通发展有限公司 | A kind of speed measuring and calculating of magnetic suspension train and Method for Calculate Mileage and system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2255046Y (en) * | 1996-07-22 | 1997-05-28 | 张跃 | Sensor for measuring speed of a train |
CN1818568A (en) * | 2006-03-13 | 2006-08-16 | 株洲天利铁路机车车辆配件有限公司 | Photoelectric speed monitoring method and device for train with magnetic transmission |
CN2906557Y (en) * | 2006-05-22 | 2007-05-30 | 株洲天利铁路机车车辆配件有限公司 | Contact-less photoelectric train speed sensor |
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2010
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2255046Y (en) * | 1996-07-22 | 1997-05-28 | 张跃 | Sensor for measuring speed of a train |
CN1818568A (en) * | 2006-03-13 | 2006-08-16 | 株洲天利铁路机车车辆配件有限公司 | Photoelectric speed monitoring method and device for train with magnetic transmission |
CN2906557Y (en) * | 2006-05-22 | 2007-05-30 | 株洲天利铁路机车车辆配件有限公司 | Contact-less photoelectric train speed sensor |
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