CN107764572A - A kind of method of testing of city railway vehicle tractive effort at wheel rim - Google Patents
A kind of method of testing of city railway vehicle tractive effort at wheel rim Download PDFInfo
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- CN107764572A CN107764572A CN201710784744.0A CN201710784744A CN107764572A CN 107764572 A CN107764572 A CN 107764572A CN 201710784744 A CN201710784744 A CN 201710784744A CN 107764572 A CN107764572 A CN 107764572A
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Abstract
A kind of city railway vehicle tractive effort at wheel rim method of testing, current sensor is exported first, voltage sensor output and accelerometer output incoming analog signal interface, radar signal access computer, test collecting unit be connected with computer；Then one section of straight track is selected to be tested, handle shifts the full level of traction onto, utilizes each sensor signal of computer acquisition；The passage that allocation of computer test collecting unit uses, turnover speed, traction electric machine efficiency, transmission efficiency, the running resistance model of vehicle and the sample frequency of system are set, according to the data of sample frequency successively acquisition configuration passage, according to the voltage of collection, electric current, speed and acceleration signal, situation is divided to calculate tractive effort at wheel rim by computer.The present invention reduces the equipment of test, is easy to carry and tests.Computer automatic data collection, calculating and display, method of testing in test process is simply efficient.
Description
Technical field
The present invention relates to field of track traffic, more particularly to a kind of method of testing of city railway vehicle tractive effort at wheel rim.
Background technology
The tractive effort at wheel rim of urban rail transit vehicles is particularly significant, is related to pulling figure and the acceleration examination of train
Test.The relative motion of rotation and wheel track yet with wheel shaft, tractive effort at wheel rim during driving are difficult to direct measurement.Existing
In measuring technology, typically using indirect test method test tractive effort at wheel rim, due to the vehicle letter of indirect test method application
Number source and species it is different, testing crew frequently with scattered kinds of experiments instrument and equipment, add experiment complexity,
Reduce the efficiency and reliability of experiment.Simultaneously as the tractive force of indirectly testing is not acquired directly, testing crew needs
Great number tested data is analyzed and handled.The above do not comply with integrated modern measure, facilitation, automation will
Ask.
The content of the invention
It is an object of the invention to provide a kind of indirect test method of city railway vehicle tractive effort at wheel rim, this method can reduce survey
Equipment required during tractive force is tried, test process simply, conveniently, to the automatic sampling of test data and analysis, improves pulling figure
Train type approval test efficiency and analysis precision.
To achieve the above object, the present invention provides a kind of city railway vehicle tractive effort at wheel rim method of testing, it is characterised in that bag
Include the following steps：
Step 1：Placement sensor ON TRAINS：With the line electricity of three current sensor measurements, one axletree traction electric machine
Flow iu、ivAnd iw, use three voltage sensors to connect the three-phase windings measurement line voltage u into traction electric machine in a manner of △ connectsu、uv
And uw；The speed per hour v of radar surveying train is installed outside train；Accelerometer is fixed in compartment, measures the longitudinal direction acceleration of train
Spend a；
Step 2：Current sensor is exported, voltage sensor exports and the output incoming analog signal of accelerometer connects
Mouthful；
Step 3：Radar signal is accessed into computer, test collecting unit is connected with computer；
Step 4：One section of straight track of selection is tested, and handle shifts the full level of traction onto, is respectively passed using computer acquisition
Sensor signal；
Step 5：The passage that allocation of computer test collecting unit uses, turnover speed, traction electric machine efficiency are set, passed
Efficiency of movement, the running resistance model of vehicle and the sample frequency of system, according to the data of sample frequency successively acquisition configuration passage,
According to the voltage of collection, electric current, speed and acceleration signal, situation is divided to calculate tractive effort at wheel rim by computer：
1. speed is less than turnover speed, trailer system is operated in permanent torque area：
Fi=ωi+m×ai
Fi=ω i+m × ai
Wherein：ωiFor running resistance at various speeds；
aiFor acceleration at various speeds, m/s2；
2. speed is more than or equal to turnover speed, vehicle operation is in invariable power area：
(1) active power of traction electric machine is calculated：
Wherein：PiFor running resistance value at various speeds, kW；
The electric cycle of T traction electric machines, s；
(2) power of all traction electric machines is calculated, thus calculates the tractive effort at wheel rim of train：
Wherein：FiTractive effort at wheel rim, kN；
V car speeds, km/h；
ηiElectric efficiency (persistently puts electric efficiency)；
ηeMachinery driving efficiency；
N test systems sample the traction electric machine number of calculating；
The sum of traction electric machine on N trains；
Step 6：According to result of calculation, export and draw force curve under different speeds.
Described test collecting unit uses embedded technology, includes power module, sensor interface unit, signal condition
Unit, signal conversion unit and micro-control unit, the measured signal for realize collection, nursing one's health and change trailer system；Power module
Powered for whole collecting unit, sensor interface unit is connected with sensor, for sensor power supply and input pickup electric signal；
Sensor interface unit is connected to signal condition unit, completes the shaping, computing and LPF of sampled signal；Conditioning unit
Output is changed into data signal from analog signal, micro-control unit is transferred to through internal bus by the processing of signal conversion unit.
The positive effect of the present invention is：
(1) voltage, current signal needed for being calculated using the high test collecting unit of integrated level tractive force are acquired,
Reduce the equipment of test, be easy to carry and test.
(2) computer automatic data collection, calculating and display, method of testing in test process is simply efficient.
Brief description of the drawings
Fig. 1 is the sensor arrangement schematic diagram of traction electric machine；
The connection figure of Fig. 2 test systems；
Fig. 3 is the composition frame chart for testing collecting unit；
Fig. 4 is the inventive method flow chart；
Fig. 5 test result schematic diagrames.
Embodiment
Specific method of testing is as follows：
Step 1：Reference picture 1, Fig. 2, ON TRAINS placement sensor.(1) with three open-type current sensor measurements one
The line current i of individual axletree traction electric machineu、ivAnd iw, current sensor is fixed.Connect using three Hall type voltage sensor △
Mode measure line voltage uu、uvAnd uw, sampling sensor is fixed on plank and plank is placed in electric appliance box.2) in train
One end installation Doppler radar measurement train speed per hour v, the placement location of radar is in the bottom of car.(3) it is fixed in compartment
Accelerometer, measure the longitudinal acceleration a of train；
Step 2：Current sensor is exported, the output access of voltage sensor output signal line and accelerometer is tested
The analog signal interface of collecting unit；
Step 3：By the RS485 communication interfaces of radar signal access computer；Collecting unit is tested by optical fiber with calculating
Machine is connected；
Step 4：One section of straight track of selection is tested, and handle shifts the full level of traction onto, each using the collection of computer
The data of sensor；
Reference picture 3, test collecting unit use embedded technology, are adjusted comprising power module, sensor interface unit, signal
Unit, signal conversion unit and micro-control unit are managed, the measured signal for realize collection, nursing one's health and change trailer system；Power supply mould
Block is powered for whole collecting unit, and sensor interface unit is connected with sensor, for sensor power supply and input pickup telecommunications
Number；Interface unit is connected to signal condition unit, completes the shaping, computing and LPF of sampled signal；Conditioning unit it is defeated
Go out the processing by signal conversion unit, data signal is changed into from analog signal, micro-control unit is transferred to through internal bus.It is micro-
Control unit is managed to gathered data, and transmits computer by bus.
Step 5：Reference picture 4, the tractive force under motor friction speed is analyzed using computer, computational methods are as follows：
(1) in permanent torque area：
Fi=ωi+m×ai
Wherein：ωiFor running resistance value at various speeds；
aiFor acceleration magnitude at various speeds.
(2) in invariable power area：
Calculate the active power of traction electric machine：
Wherein：PiFor running resistance value at various speeds, kW；
The electric cycle of T traction electric machines, s.
The power of all traction electric machines is calculated, thus calculates the tractive effort at wheel rim of train：
Wherein：FiTractive effort at wheel rim, kN；
V subway vehicle speeds, km/h；
ηiElectric efficiency (persistently puts electric efficiency)；
ηeMachinery driving efficiency；
N test systems sample the traction electric machine number of calculating；
The sum of traction electric machine on N trains.
Step 6：Reference picture 5, according to result of calculation, export and draw force curve under different speeds.
Claims (2)
1. a kind of city railway vehicle tractive effort at wheel rim method of testing, it is characterised in that comprise the following steps：
Step 1：Placement sensor ON TRAINS：With the line current i of three current sensor measurements, one axletree traction electric machineu、
ivAnd iw, use three voltage sensors to connect the three-phase windings measurement line voltage u into traction electric machine in a manner of △ connectsu、uvAnd uw；
The speed per hour v of radar surveying train is installed outside train；Accelerometer is fixed in compartment, measures the longitudinal acceleration a of train；
Step 2：Current sensor is exported, voltage sensor exports and the output incoming analog signal interface of accelerometer；
Step 3：Radar signal is accessed into computer, test collecting unit is connected with computer；
Step 4：One section of straight track of selection is tested, and handle shifts the full level of traction onto, utilizes each sensor of computer acquisition
Signal；
Step 5：The passage that allocation of computer test collecting unit uses, turnover speed, traction electric machine efficiency, transmission effect are set
Rate, the running resistance model of vehicle and the sample frequency of system, according to the data of sample frequency successively acquisition configuration passage, according to
Voltage, electric current, speed and the acceleration signal of collection, situation is divided to calculate tractive effort at wheel rim by computer：
(1) speed is less than turnover speed, and trailer system is operated in permanent torque area：
Fi=ωi+m×ai
Wherein：ωiFor running resistance at various speeds；
aiFor acceleration at various speeds, m/s2；
(2) speed is more than or equal to turnover speed, and vehicle operation is in invariable power area：
(a) active power of traction electric machine is calculated：
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Wherein：PiFor running resistance value at various speeds, kW；
The electric cycle of T traction electric machines, s；
(b) power of all traction electric machines is calculated, thus calculates the tractive effort at wheel rim of train：
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<mi>F</mi>
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Wherein：FiTractive effort at wheel rim, kN；
V car speeds, km/h；
ηiElectric efficiency (persistently puts electric efficiency)；
ηeMachinery driving efficiency；
N test systems sample the traction electric machine number of calculating；
The sum of traction electric machine on N trains；
Step 6：According to result of calculation, export and draw force curve under different speeds.
A kind of 2. city railway vehicle tractive effort at wheel rim method of testing according to claim 1, it is characterised in that：Described test
Collecting unit uses embedded technology, includes power module, sensor interface unit, signal condition unit, signal conversion unit
And micro-control unit, the measured signal for realize collection, nursing one's health and change trailer system；Power module supplies for whole collecting unit
Electricity, sensor interface unit are connected with sensor, for sensor power supply and input pickup electric signal；Sensor interface unit connects
Signal condition unit is connected to, completes the shaping, computing and LPF of sampled signal；The output of conditioning unit is changed by signal
The processing of unit, is changed into data signal from analog signal, and micro-control unit is transferred to through internal bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710784744.0A CN107764572A (en) | 2017-09-04 | 2017-09-04 | A kind of method of testing of city railway vehicle tractive effort at wheel rim |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710784744.0A CN107764572A (en) | 2017-09-04 | 2017-09-04 | A kind of method of testing of city railway vehicle tractive effort at wheel rim |
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| CN107764572A true CN107764572A (en) | 2018-03-06 |
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| CN201710784744.0A Withdrawn CN107764572A (en) | 2017-09-04 | 2017-09-04 | A kind of method of testing of city railway vehicle tractive effort at wheel rim |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883598A (en) * | 2019-04-15 | 2019-06-14 | 中车株洲电力机车有限公司 | A kind of detection method of rail locomotive tractive force |
| CN112083329A (en) * | 2020-08-19 | 2020-12-15 | 中车长春轨道客车股份有限公司 | Debugging system and debugging method for judging rotating direction of traction motor of motor train unit |
| CN114858490A (en) * | 2022-03-21 | 2022-08-05 | 中国第一汽车股份有限公司 | Snowmobile steering load test system and method and snowmobile steering load test system |
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| CN2634457Y (en) * | 2003-06-25 | 2004-08-18 | 重庆宗申技术开发研究有限公司 | Traction force detector for motorcycle start |
| US20090133484A1 (en) * | 2007-11-27 | 2009-05-28 | Ono Sokki Co., Ltd. | Vehicle locking device and vehicle locking method |
| CN102564777A (en) * | 2011-12-22 | 2012-07-11 | 中国北车集团大连机车研究所有限公司 | Centering adjustment method for wheel sets of locomotive test stand and traction force meter stand thereof |
| CN103246274A (en) * | 2013-05-20 | 2013-08-14 | 南车株洲电力机车有限公司 | Locomotive traction performance measuring system |
| CN104596779A (en) * | 2015-01-26 | 2015-05-06 | 中国铁道科学研究院机车车辆研究所 | Testing method for tractive characteristics and electric braking characteristics of motor train unit |
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2017
- 2017-09-04 CN CN201710784744.0A patent/CN107764572A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2634457Y (en) * | 2003-06-25 | 2004-08-18 | 重庆宗申技术开发研究有限公司 | Traction force detector for motorcycle start |
| US20090133484A1 (en) * | 2007-11-27 | 2009-05-28 | Ono Sokki Co., Ltd. | Vehicle locking device and vehicle locking method |
| CN102564777A (en) * | 2011-12-22 | 2012-07-11 | 中国北车集团大连机车研究所有限公司 | Centering adjustment method for wheel sets of locomotive test stand and traction force meter stand thereof |
| CN103246274A (en) * | 2013-05-20 | 2013-08-14 | 南车株洲电力机车有限公司 | Locomotive traction performance measuring system |
| CN104596779A (en) * | 2015-01-26 | 2015-05-06 | 中国铁道科学研究院机车车辆研究所 | Testing method for tractive characteristics and electric braking characteristics of motor train unit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883598A (en) * | 2019-04-15 | 2019-06-14 | 中车株洲电力机车有限公司 | A kind of detection method of rail locomotive tractive force |
| CN109883598B (en) * | 2019-04-15 | 2021-06-04 | 中车株洲电力机车有限公司 | Method for detecting traction force of rail locomotive |
| CN112083329A (en) * | 2020-08-19 | 2020-12-15 | 中车长春轨道客车股份有限公司 | Debugging system and debugging method for judging rotating direction of traction motor of motor train unit |
| CN114858490A (en) * | 2022-03-21 | 2022-08-05 | 中国第一汽车股份有限公司 | Snowmobile steering load test system and method and snowmobile steering load test system |
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Application publication date: 20180306 |