CN107607339A - A kind of city railway vehicle skid resistance assessment system and appraisal procedure - Google Patents
A kind of city railway vehicle skid resistance assessment system and appraisal procedure Download PDFInfo
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- CN107607339A CN107607339A CN201710784695.0A CN201710784695A CN107607339A CN 107607339 A CN107607339 A CN 107607339A CN 201710784695 A CN201710784695 A CN 201710784695A CN 107607339 A CN107607339 A CN 107607339A
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Abstract
A kind of city railway vehicle skid resistance assessment system, including data collecting system, data handling system, described data collecting system is formed by testing with sensor and collecting unit, the output signal of collection sensor is transmitted to data handling system, described data handling system extends multiple embedded controllers, the signal that data collecting system transmits is handled, realize that passage configures, real-time display, storage, playback and off-line analysis, simultaneously, call analysis of experiments subprogram, to the parallel data processing of acquisition channel, simultaneously data are acquired in each sampling period, the real-time display of result of calculation and storage.Assessed securely and reliably using the system is anti-skidding, assess comprehensively, reduce the quantity of testing equipment, be easy to carry and test, improve the reliability of experiment, improve the efficiency of skid resistance test.
Description
Technical field
The present invention relates to field of track traffic, more particularly to a kind of skid resistance assessment system of city railway vehicle and assessment side
Method.
Background technology
With the raising of urban rail transit vehicles speed, the probability increase of wheel sliding, wheel sliding bring braking away from
From extension and take turns to abrasive adverse effect.In order to ensure that city railway vehicle has more preferable slide protective, palpus in low stick together under road conditions
The skid resistance of vehicle is assessed and verified.
The brake force of city railway vehicle mainly includes electric braking and air damping, and both of which belongs to adhesion braking, braked
During power applies, inevitably there is the problem of wheel sliding due to sticking together condition change between wheel track, go out in city railway vehicle
, it is necessary to carry out vehicle limited slip capability evaluation before factory's operation.In existing measuring technology, more by the comparison of axle speed and speed,
Whether braking distance, viewing vehicle are abraded to assess the non-skid property of vehicle, and these determination methods are not to circuit
Initial adhesion assess, do not have to assess the degree that vehicle slides yet, assessment it is more unilateral.Also, anti-skidding
Need measurement signal more in experiment, including GES, each axle speed signal, current of electric, acceleration signal, these signals
Conversion equipment is different, and equipment is more dispersed, it has not been convenient to carries, reduces the efficiency and reliability of experiment.Axle speed sensor
It is not easy to operate when mounted, also need to punch installation on brake shoe sometimes, potential safety hazard is brought to test vehicle.
The content of the invention
The purpose of the present invention is provides the skid resistance appraisal procedure of a kind of urban rail transit vehicles and a set of integrated
Anti-skidding test system, system occupy little space, workable, can Automatic analysis to test data.
For achieving the above object, the present invention provides a kind of city railway vehicle skid resistance assessment system, it is characterised in that：
Including data collecting system, data handling system, described data collecting system is formed by testing with sensor and collecting unit,
Tachogenerator includes velocity radar, electric moter voltage sensor, current sensor, accelerometer, and collecting unit includes and each biography
The interface of sensor, the output signal for gathering sensor are transmitted to data handling system, using network signal line and setting address and partially
Shifting amount reads the axle speed signal of former car network, and described data handling system is collecting computer Portable machine box, computer
Extend multiple embedded controllers, the signal that data collecting system transmits handled, realize passage configuration, real-time display,
Storage, playback and off-line analysis, meanwhile, analysis of experiments subprogram is called, to the parallel data processing of acquisition channel, while
Each sampling period is acquired data, the real-time display of result of calculation and storage.
Described collecting unit includes analog signal board, handle level conversion board, data signal board, analog signal
Board has sample circuit, modulate circuit and A/D change-over circuits, and sample circuit includes sensor interface and interface circuit, realizes
Powered to sensor and the measurand in vehicle is switched into electric signal, modulate circuit is using high-precision, high bandwidth integrated
Operational amplifier is filtered and nursed one's health to sampled signal, is changed into data signal eventually through A/D change-over circuits；Data signal board has
There are isolation circuit, level conversion and input/output circuitry, various switching mode hard signals, axle speed sensor on vehicle are carried out
Isolation and shaping, are output to Control card；Handle signal transducer card forms and function is with data signal board, by handle
Level signal Control card is conveyed in the form of digital quantity；Control card is carried out by local bus to each road sampled signal
Management, is controlled using the serial SPI in 56 roads and parallel data bus line, there is the photoelectric switching circuit of fiber optic communication on Control card
And interface, by collecting unit sampling vehicle a large amount of test signals pack upload, and receive data handling system management and
Configuration.
A kind of city railway vehicle skid resistance appraisal procedure, it is characterised in that comprise the following steps：
1st, on-test, the suds of 3%-10% concentration are sprinkled on the track of straight drying, at the beginning of specified
Speed travels, and starts to brake to 100km/h, can be slided in braking procedure, if not sliding, re-starts above-mentioned behaviour
Make；
2nd, initial tack is assessed, in braking procedure, if skidding, during skidding the speed of first wheel pair with
Car speed separation carries out tangent line to rate curve, selects △ t≤0.4s, calculate average retardation rate a, a ＜ as central point
If 0.784, illustrate that the skid conditions have met initial tack standard.If being unsatisfactory for skid conditions, increase solution concentration, weight
New experiment；
3rd, sliding for car wheel-set is assessed, at least half wheel is to sliding, also, axle speed is less than speed
90%, if not satisfied, testing again；
4th, skid resistance is assessed, deceleration and the curve of time are selected, by the deceleration maximum line structure of each fluctuation
Into envelope, deceleration and the area of time and the area of envelope and time shaft are calculated, ratio is more than 80%, is considered as vehicle and prevents
Cunning is functional.
The positive effect of the present invention is：
(1) collecting unit is integrated in a casing, is reduced the quantity of testing equipment, is easy to carry and tests, and is improved
The reliability of experiment, the initial adhesion of circuit is assessed, and the degree that vehicle slides assessed, the comparison of assessment
Comprehensively.
(2) axle speed sensor selection external sensor installation, it also may be selected to read the realization of vehicle network axle speed signal, improve
The reliability and security of experiment.
(3) test software has display, the function of calculating and store, and can judge whether vehicle occurs anti-skidding and car at once
Anti-skidding protective capability, improve the efficiency of skid resistance test.
Brief description of the drawings
Fig. 1 is the structure chart of anti-skidding assessment system provided by the invention；
Fig. 2 is the structure chart of collecting unit；
Fig. 3 is anti-skidding appraisal procedure flow chart；
Fig. 4 is test flow chart of the present invention.
Embodiment
Fig. 1 is the antiskid system structure composition, mainly includes data collecting system and data handling system.Data acquisition system
System mainly includes collection sensor, collecting unit, and sensor includes voltage sensor, current sensor, velocity radar, acceleration
Sensor, wherein current sensor can be open-type or be closed type, any selection as needed, sensor
Number amount and type should meet the needs of experimental test.The output of sensor is connected respectively to according to analog signal or data signal and adopted
Collect the analog signal interface or digital interface of unit, meanwhile, it is voltage or electric current that analog signal interface, which can correspond to output type,
The standard signal of type.Described data handling system is collecting computer Portable machine box, and computer extends multiple embedded controls
Device processed, the signal that data collecting system transmits is handled, realize passage configuration, real-time display, storage, playback and offline
Analysis, meanwhile, call analysis of experiments subprogram, the data of acquisition channel can parallel processing, while carried out in each sampling period
Gathered data, the real-time display of result of calculation and storage.
Reference picture 2, collecting unit include 10 pieces of analog signal boards, 1 piece of handle level conversion board, 1 piece of data signal
Board, Control card.After all sensor signal processing, data handling system is uploaded to by fiber optic communication, while
The control instruction of data handling system is received, completes management and configuration.In addition, Doppler radar is disposed to measure car on vehicle
Speed, and result is uploaded to data handling system by 485 buses.Because axle speed poor signal gathers during experiment, so
Using the axle speed signal of former car network, using network signal line and address and offset is set to read the network signal of former car.
Analog signal board has sample circuit, modulate circuit and A/D change-over circuits.Sample circuit includes sensor interface
And interface circuit, realize and powered to sensor and the measurand in vehicle is switched into electric signal.Modulate circuit is using high-precision
Degree, the integrated operational amplifier of high bandwidth are filtered and nursed one's health to sampled signal.It is changed into data signal by controlling eventually through A/D conversions
Single Component Management processed.
Data signal board has the digital circuits such as isolation circuit, level conversion and input/output circuitry, to each on vehicle
Kind switching mode hard signal, axle speed sensor etc. are isolated and shaping, is output to Control card.
Handle signal transducer card forms and function is with data signal board, by the level signal of handle with digital quantity
Form be conveyed to Control card.
Control card is managed by local bus to each road sampled signal.Typically, using the serial SPI in 56 roads and simultaneously
Row data/address bus is controlled.There are the photoelectric switching circuit and interface of fiber optic communication on Control card, by collecting unit sampling
A large amount of test signals packing of vehicle uploads, and receives the management and configuration of data handling system.
Reference picture 3, anti-skidding appraisal procedure process, is mainly judged from following several respects：
1st, on-test, the suds of 3%-10% concentration are sprinkled on the track of straight drying, at the beginning of specified
Speed travels, and starts to brake to 100km/h, can be slided in braking procedure, if not sliding, re-starts above-mentioned behaviour
Make；
2nd, initial tack is assessed, in braking procedure, if skidding, during skidding the speed of first wheel pair with
Car speed separation carries out tangent line to rate curve, selects △ t≤0.4s, calculate average retardation rate a, a ＜ as central point
If 0.784, illustrate that the skid conditions have met initial tack standard.If being unsatisfactory for skid conditions, increase solution concentration, weight
New experiment；
3rd, sliding for car wheel-set is assessed, at least half wheel is to sliding, also, axle speed is less than speed
90%, if not satisfied, testing again；
4th, skid resistance is assessed, deceleration and the curve of time are selected, by the deceleration maximum line structure of each fluctuation
Into envelope, deceleration and the area of time and the area of envelope and time shaft are calculated, ratio is more than 80%, is considered as vehicle and prevents
Cunning is functional.
Reference picture 4, the test software of collecting computer realize passage using the patterned programming idea exploitations of LabVIEW
The functions such as configuration, real-time display, storage, playback and off-line analysis, testing process are：
(1) initialize, verifying authorization, configure sample rate and passage；
(2) axle speed signal behavior：0, to read vehicle original car signal, sets network address and offset；1 is reading axle speed
Sensor signal；
(3) synchronous each channel data；
(4) major cycle is tested；
1. start to test；
2. handle union test data；
3. output result.
(5) test data is stored and shown, terminate the pilot project.
Claims (3)
- A kind of 1. city railway vehicle skid resistance assessment system, it is characterised in that：Including data collecting system, data handling system, Described data collecting system is formed by testing with sensor and collecting unit, and tachogenerator includes velocity radar, motor electricity Pressure sensor, current sensor, accelerometer, collecting unit include the interface with each sensor, gather the output letter of sensor Number data handling system is transmitted to, using network signal line and sets address and offset to read the axle speed signal of former car network, Described data handling system is collecting computer Portable machine box, and computer extends multiple embedded controllers, data are adopted The signal that collecting system transmits is handled, and realizes passage configuration, real-time display, storage, playback and off-line analysis, meanwhile, adjust With analysis of experiments subprogram, to the parallel data processing of acquisition channel, while data, calculating are acquired in each sampling period As a result real-time display and storage.
- 2. city railway vehicle skid resistance assessment system according to claim 1, it is characterised in that：Described collecting unit bag Board containing analog signal, handle level conversion board, data signal board, Control card, analog signal board have sampling electricity Road, modulate circuit and A/D change-over circuits, sample circuit include sensor interface and interface circuit, realize to sensor power supply simultaneously Measurand in vehicle is switched into electric signal, modulate circuit is using high accuracy, the integrated operational amplifier of high bandwidth to adopting Sample signal filters and conditioning, is changed into data signal eventually through A/D change-over circuits；Data signal board has isolation circuit, electricity Flat turn is changed and input/output circuitry, and to various switching mode hard signals on vehicle, axle speed sensor is isolated and shaping, defeated Go out to Control card；Handle signal transducer card forms and function is with data signal board, by the level signal of handle with The form of digital quantity is conveyed to Control card；Control card is managed by local bus to each road sampled signal, using 56 The serial SPI in road and parallel data bus line are controlled, and are had the photoelectric switching circuit and interface of fiber optic communication on Control card, are used for A large amount of test signals of the vehicle of collecting unit sampling are packed and uploaded, and receive the management and configuration of collecting computer.
- A kind of 3. appraisal procedure of city railway vehicle skid resistance assessment system according to claim 1, it is characterised in that bag Include the following steps：(1) on-test, the suds of 3%-10% concentration are sprinkled on the track of straight drying, according to specified initial velocity row Sail, start to brake to 100km/h, can be slided in braking procedure, if not sliding, re-start aforesaid operations；(2) initial tack is assessed, in braking procedure, if skidding, the speed and car of first wheel pair during skidding Speed separation carries out tangent line to rate curve, selects △ t≤0.4s, calculate average retardation rate a, a ＜ as central point If 0.784, illustrate that the skid conditions have met initial tack standard, if being unsatisfactory for skid conditions, increase solution concentration, weight New experiment；(3) sliding for car wheel-set to be assessed, at least half wheel is to sliding, also, axle speed is less than speed 90%, if It is unsatisfactory for, tests again；(4) skid resistance is assessed, selects deceleration and the curve of time, the deceleration maximum line of each fluctuation is formed into bag Winding thread, calculates deceleration and the area of time and the area of envelope and time shaft, and ratio is more than 80%, is considered as vehicle limited slip Can be good.
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| Application Number | Priority Date | Filing Date | Title |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112197981A (en) * | 2019-07-08 | 2021-01-08 | 中车长春轨道客车股份有限公司 | Method and device for testing anti-skid performance of railway vehicle |
| CN112327705A (en) * | 2020-11-12 | 2021-02-05 | 浙江工业大学 | Intelligent trolley parking control system and method based on copper wire dissolution |
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| CN104458296A (en) * | 2015-01-08 | 2015-03-25 | 青岛四方车辆研究所有限公司 | Detection system for city railway train braking performance |
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| CN207336096U (en) * | 2017-09-04 | 2018-05-08 | 中车长春轨道客车股份有限公司 | A kind of city railway vehicle skid resistance assessment system |
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2017
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Patent Citations (5)
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| KR20010070943A (en) * | 1999-12-07 | 2001-07-28 | 안우희 | A trialrun efficiency test equipment for railroad carriage |
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| CN106895982A (en) * | 2017-02-24 | 2017-06-27 | 中车青岛四方车辆研究所有限公司 | Traction braking integrated test system for performance |
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| CN112197981A (en) * | 2019-07-08 | 2021-01-08 | 中车长春轨道客车股份有限公司 | Method and device for testing anti-skid performance of railway vehicle |
| CN112327705A (en) * | 2020-11-12 | 2021-02-05 | 浙江工业大学 | Intelligent trolley parking control system and method based on copper wire dissolution |
| CN112327705B (en) * | 2020-11-12 | 2021-12-31 | 浙江工业大学 | Intelligent trolley parking control system and method based on copper wire dissolution |
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