CN102004169A - Off-pulse fault diagnosing and velocity reading correcting method for train photoelectric speed sensor - Google Patents
Off-pulse fault diagnosing and velocity reading correcting method for train photoelectric speed sensor Download PDFInfo
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- CN102004169A CN102004169A CN 201010281691 CN201010281691A CN102004169A CN 102004169 A CN102004169 A CN 102004169A CN 201010281691 CN201010281691 CN 201010281691 CN 201010281691 A CN201010281691 A CN 201010281691A CN 102004169 A CN102004169 A CN 102004169A
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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 is subjected to paying close attention to widely always.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 being subjected to the influence of external environment condition and train self-operating in speed pickup unavoidably.The speed pickup that adopts ON TRAINS mainly is light electricity velocity sensor (photoelectric code disk) at present.The present invention then relates to a kind of method of falling pulse fault diagnosis and velocity readings correction at train-installed light electricity velocity sensor.
Train-installed light electricity velocity sensor is installed on the train wheel.When train operation, it is converted to electric impulse signal with the velocity of rotation of train wheel by grating and photovoltaic principals, after machine is handled as calculated, 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 may be 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 may 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 at the deficiencies in the prior art, provide a kind of train-installed light electricity velocity sensor to fall pulse fault diagnosis and velocity readings bearing calibration.
The step that train-installed light electricity velocity sensor falls pulse fault diagnosis and velocity readings bearing calibration is as follows:
1) in train travelling process,, measures the travelling speed of train by train-installed light electricity velocity sensor
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 the travel distance in each sampling time section
And, calculate total walking distance of train current time with the travel distance addition in each time period
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 of the train current time that obtains according to step 3)
Step 4) extrapolates accurately that the total walking distance L and the light electricity velocity sensor shadow shield of train current time should have raster count N, according to formula
Estimate to obtain the umber of pulse of falling of train-installed light electricity velocity sensor
6) according to the umber of pulse of falling of train-installed light electricity velocity sensor
According to formula
The travelling speed of the train after obtaining to proofread and correct
Described in train travelling process, by train-installed light electricity velocity sensor, the step that measures the travelling speed of train is: 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 the light source to the sensor, thereby forms
Individual light pulse after photoelectric sensor receives light pulse, converts corresponding light pulse to
Individual electric pulse, k=1 wherein, 2,3 ... be the discrete time index, adopt following formula to calculate the current travelling speed of train
Wherein, D is the train wheel diameter, and 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: to train running speed
Carry out obtaining after the smoothing processing train running speed after 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 according to the train running speed of following formula calculating after smoothing processing
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.
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 positioning information comparatively accurately, by 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
Shown in accompanying drawing 1,2, the step that train-installed light electricity velocity sensor falls pulse fault diagnosis and velocity readings bearing calibration is as follows:
1) in train travelling process,, measures the travelling speed of train by train-installed light electricity velocity sensor
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 the travel distance in each sampling time section
And, calculate total walking distance of train current time with the travel distance addition in each time period
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 of the train current time that obtains according to step 3)
Step 4) extrapolates accurately that the total walking distance L and the light electricity velocity sensor shadow shield of train current time should have raster count N, according to formula
Estimate to obtain the umber of pulse of falling of train-installed light electricity velocity sensor
6) according to the umber of pulse of falling of train-installed light electricity velocity sensor
According to formula
The travelling speed of the train after obtaining to proofread and correct
Described in train travelling process, by train-installed light electricity velocity sensor, the step that measures the travelling speed of train is: 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 the light source to the sensor, thereby forms
Individual light pulse after photoelectric sensor receives light pulse, converts corresponding light pulse to
Individual electric pulse, k=1 wherein, 2,3 ... be the discrete time index, adopt following formula to calculate the travelling speed of train
Wherein, D is the train wheel diameter, and 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: to train running speed
Carry out obtaining after the smoothing processing train running speed after 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 according to the train running speed of following formula calculating after smoothing processing
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.
Embodiment:
At three kinds of different train operation situations, described method is applied to monitor train-installed light electricity velocity sensor.These three kinds of situations 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, by this section running distance; Situation 3, train is with the constant speed of the 200km/h running distance by preceding 500m, again with 0.04m/s
2Acceleration by remaining distance.In each case again at eight kinds different fall the pulse fault, concrete steps of the present invention are as follows:
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, and sampling period T=0.1s notes the umber of pulse that each sampling obtains
Utilize formula
Calculate the travelling speed of train, 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. calculate total walking distance of current time according to the train running speed after smoothing processing and sampling time
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
With total walking distance L of the accurate train that obtains by step 4, substitution formula
In, calculate the pulsed quantity that falls of light electricity velocity sensor
Diagnostic result is as shown in table 1:
Table 1 falls pulse fault diagnosis result table
As can be seen, in different train operation situations 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 from monitoring result, 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 by 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 proofreaies and correct the result as shown in Figure 3.
From proofreading and correct the result as can be seen, do not carrying out timing, the travelling speed of the train that measures and actual motion speed have than big-difference, and 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 as follows:
1) in train travelling process,, measures the travelling speed of train by train-installed light electricity velocity sensor
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 the travel distance in each sampling time section
And, calculate total walking distance of train current time with the travel distance addition in each time period
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 of the train current time that obtains according to step 3)
Step 4) extrapolates accurately that the total walking distance L and the light electricity velocity sensor shadow shield of train current time should have raster count N, according to formula
Estimate to obtain the umber of pulse of falling of 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, by train-installed light electricity velocity sensor, the step that measures the travelling speed of train is: from the initial alignment position, during train operation, a length is in the sampling period of T, train operation makes wheel drive the shadow shield motion, many gratings are arranged on the shadow shield, 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, converts corresponding light pulse to
Individual electric pulse, k=1 wherein, 2,3 ... be the discrete time index, adopt following formula to calculate the travelling speed of train
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 after the smoothing processing train running speed after 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 according to the train running speed of following formula calculating after smoothing processing
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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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
CN104835102A (en) * | 2015-05-05 | 2015-08-12 | 北京交通大学 | Train speed measuring scheme evaluation method and apparatus |
CN108663534A (en) * | 2017-03-30 | 2018-10-16 | 比亚迪股份有限公司 | Train and its speed-measuring method and system |
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 |
-
2010
- 2010-09-10 CN CN2010102816919A patent/CN102004169B/en not_active Expired - Fee Related
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 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
CN104835102A (en) * | 2015-05-05 | 2015-08-12 | 北京交通大学 | Train speed measuring scheme evaluation method and apparatus |
CN108663534A (en) * | 2017-03-30 | 2018-10-16 | 比亚迪股份有限公司 | Train and its speed-measuring method and system |
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 |
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CN102004169B (en) | 2012-01-25 |
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