CN100419402C - Dynamometer system for motorcar chassis - Google Patents
Dynamometer system for motorcar chassis Download PDFInfo
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- CN100419402C CN100419402C CNB2004101040055A CN200410104005A CN100419402C CN 100419402 C CN100419402 C CN 100419402C CN B2004101040055 A CNB2004101040055 A CN B2004101040055A CN 200410104005 A CN200410104005 A CN 200410104005A CN 100419402 C CN100419402 C CN 100419402C
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Abstract
The present invention relates to a power measuring system for automobile chassis, which comprises a signal conditioning module, a data collecting card, an industrial computer, a frequency changer, a load controller, a chassis power measuring machine, a sensor, a direct current motor and a fan, wherein the input terminal of the signal conditioning module is connected with the chassis power measuring machine through the sensor, and the output terminal is connected with the input terminal of the data collecting card of which the output terminal is connected with the industrial computer. The control output terminal of the signal conditioning module is simultaneously connected with the frequency changer of the fan, and the load controller connected with the motor. The present invention can simulate various operating conditions when an automobile runs on roads indoors so as to measure out the output power of driving wheels of an automobile; the system can also analyze the tail gas exhaust of an automobile, and can also test the conditions of acceleration, slide and oil consumption.
Description
Technical field
The present invention relates to a kind of dynamometer system for motorcar chassis that automobile chassis and other wheel machines are measured.
Background technology
Automobile is carried out vehicle performance test, normally carry out working condition measurement with real vehicle, its test process more complicated, the test required time is long, because of the differentia influence measuring accuracy of road surface existence.And the introducing road simulation dynamometer, then can be to vehicle in the indoor test of carrying out simulated condition, the effect that is reached is identical.Road simulation dynamometer is the equipment that car load dynamic property, fuel economy and the car load of automobile and other wheel machines is fitted into performing check.Generally be to adopt the current vortex loader to do resistant load in existing dynamometer machine, this current vortex loader does not have the function of control loaded, and control loaded need have other control system, makes complex structure.In the measurement of power process, the key problem that needs to solve also has: the calculating of (1) moment of torsion in addition; (2) transient state loads; (3) road conditions simulation.
Summary of the invention
Technical matters to be solved by this invention is at the above-mentioned defective of existing in prior technology, a kind of various operating modes that can be when lab simulation goes out automobile in travels down are provided, and then measure the dynamometer system for motorcar chassis of automobile driving wheel output power, this system can also analyze the exhaust emissions of automobile, and test is quickened, slided and the oil consumption situation.
The technical scheme that solution the technology of the present invention problem is adopted is this dynamometer system for motorcar chassis, include the signal condition module, data collecting card, industrial computer, frequency converter, loading control, man machine operation interface, chassis dynamometer, sensor, direct current generator and blower fan, wherein, the input end of signal condition module receives the signal of chassis dynamometer by sensor, its output terminal is connected with the input end of data acquisition fixture block, the output terminal of data collecting card is connected with industrial computer, and signal condition module controls output terminal also is connected with the loading control that is connected with direct current generator with the frequency converter that is connected with blower fan simultaneously.
Among the present invention:
Described sensor is torque sensor and speed pickup, fuel consumption meter, flowmeter, and these sensors all can adopt the sensor with required function of the prior art;
Described chassis dynamometer adopts the double rotating drum chassis dynamometer;
Loading control adopts electric feedback loading controller;
There is man machine operation interface to be connected with the signal condition module;
Data collecting card adopts the data collecting card of sampling rate with 12 precision, 200K, 16 road analog input channels, 2 tunnel analog output channels, 8 way word output channels.
Among the present invention, industrial computer can carry out the calculating of moment of torsion by after obtaining signal from signal condition module and data collecting card, is promptly finished the calculating of moment of torsion by software, thereby has saved hardware resource, has also improved the accuracy of calculating simultaneously.
Use direct current generator both to can be used as resistant load among the present invention, also can be used as power drive, Direct Torque Control loads, and has overcome the shortcoming that used current vortex machine in the prior art can only be used as resistant load.In constant speed measurement of power process, direct current generator adopts PID (ratio-differential one integration) control, simplified the operating process of constant speed measurement of power, and shortening consuming time, precision improves, and adopts direct current generator to load, can directly drive rotary drum, in multinomial test and debug process such as sliding, can use automobile, only need the parameters of input tested vehicle to get final product.The present invention has normally solved the problems such as calculating, transient state loading and road conditions simulation of moment of torsion effectively in the measurement of power process.
Description of drawings
Below in conjunction with the embodiment accompanying drawing the present invention is described in further detail.
Fig. 1 is hardware configuration theory diagram figure of the present invention
Fig. 2 (being accompanying drawing 1A) is the schematic block circuit diagram of module 1 signal condition module among Fig. 1
Among the figure: 1-signal condition module, 2-data collecting card (can adopt NI 6025E data collecting card), 3-industrial computer, 4-frequency converter, the 5-loading control, 6-man machine operation interface, 7-chassis dynamometer, 8-torque sensor, the 9-speed pickup, 10-electrical network, 11-direct current generator, 12-blower fan.
Embodiment
As shown in Figure 1, dynamometer system for motorcar chassis of the present invention, include signal condition module 1, data collecting card 2, industrial computer 3, frequency converter 4, loading control 5, man machine operation interface 6, chassis dynamometer 7, torque sensor 8, pulse rotational speed 9, electrical network 10, direct current generator 11 and blower fan 12.
Wherein, the loading control 5 that is connected on the electrical network 10 is connected with chassis dynamometer 7 by direct current generator 11, and pulse rotational speed 9 and torque sensor 8 are gathered the rate signal and the torque signal of double rotating drum chassis dynamometer 7 respectively, and be converted into electric signal, respectively through pin Count0_C, Countl_C and pin 0_C, 1_C sends into signal condition module 1, signal condition module 1 is at different pending signals, as shown in Figure 2, adopted electric current to change potential circuit, bleeder circuit, amplifying circuit, filtering circuit, difference channel, drive amplifying circuit, existing multiple typical circuit and applied in any combination thereof such as 74 series gate circuit buffer circuits, these functional circuit interblocks interconnect and interface circuit also all is the classical circuit of the simulation simplified most, to realize that the original signal of input is nursed one's health into standard signal (0-5V/4-20mA).These signals are through after nursing one's health, send into the input end of data collecting card 2 by the output terminal of signal condition module 1, data collecting card 2 can be transformed into digital quantity with analog quantity, this is a kind of 12 precision A/D that have, I/O passage more than 8 tunnel, 16/8 tunnel analog differential acquisition channel, 2 tunnel analog output channels, but data collecting card 2 with 2 tunnel 32 I/O counters, it connects industrial computer 3 by pci interface these signals is carried out software processes, and result's (this moment for steering order) fed back to data collecting card 2, send into signal condition module 1 through pin DAC0 and DAC1 again, the control output end DAC_0 of signal condition module 1 and DAC_1 simultaneously also respectively with frequency converter 4, loading control 5 connects, to transmit steering order, make frequency converter 4 regulate blower fan 12, loading control 5 is regulated direct current generator 11, to create the emulation mode that is fit to various operating modes.
In addition, man machine operation interface 6 is connected on the data collecting card 2, so that subsidiary functions such as warning, fault demonstration to be provided.
In the present embodiment, chassis dynamometer 7 adopts the double rotating drum chassis dynamometer, promptly is arranged with two rotary drums (also can be referred to as roller bearing) at automobile driving wheel.When rotary drum rotates, can drive the driving wheel rotation, be called forward and drag, and rotate when driving wheel, then drive drum rotating, then be called oppositely and drag.General loading control generally adopts the current vortex loading control, this loading control has bigger restriction to the control performance of system, and the loading control among the present invention adopts electric feedback loading controller, can drag rotary drum is counter, rotary drum can instead drag starting, load thereby can carry out transient state, directly chassis dynamometer is carried out torque control, improved the efficient and the precision of system engine.
The course of work of the present invention is as follows: at first gather original signal by torque sensor 8 and speed pickup 9, be sent to signal condition module 1, after 1 pair of original signal of signal condition module is carried out processing such as filtering/amplification/conversion, standard signal to data collecting card 2 output standards, data collecting card 2 receives and samples, convert digital signal again to, these digital signals by 3 pairs of receptions of industrial computer are carried out computing, account form is for by mathematical operation, by torque value and the velocity amplitude measured, multiply each other and extrapolate the driving wheel performance number, and draw steering order according to the result; Simultaneously, industrial computer 3 feeds back to data collecting card 2 with steering order, and data collecting card 2 sends steering order by signal condition module 1 to loading control 5 and frequency converter 4 with signal condition module 1 switching signal again.Wherein loading control 5 has played pivotal role in control system of the present invention, and it and chassis dynamometer 7 constitute the hardware platforms of native systems jointly.
The present invention can simulate the operating condition of multiple vehicle, can test output power, tail gas composition, sliding performance, acceleration, the oil consumption of automobile driving wheel, and can verification automotive speedometer, and the data in the process of the test are analyzed.Its function and method are as described below:
1. the output power of constant speed method testing automobile driving wheel
Automobile is travelled on the double rotating drum of chassis dynamometer, and keep air throttle standard-sized sheet all the time.Native system adopts PID (Proprotional ratio-differential-integration) control method, the rotating speed of control double rotating drum is the steady state value of a certain prior setting, because the rotation of double rotating drum, the rotation of driving automobile driving wheel, then the speed of a motor vehicle of automobile also will be limited on the speed measuring point corresponding with this steady state value, measure the moment of torsion of rotary drum simultaneously by torque sensor, the moment of torsion of mensuration and fixed vehicle speed multiply each other and can obtain the driving wheel output power of tested automobile on this speed point.
In whole process, signal condition module, data collecting card carry out early stage to signal to be handled, and is then got corresponding results by the Computer Processing computing.
2. the permanent output power of turning round method testing automobile driving wheel
Similar with function 1, automobile is travelled on the double rotating drum of chassis dynamometer, keep air throttle standard-sized sheet all the time.Native system is exported a certain constant-torque by loading control control motor to double rotating drum, when automobile driving wheel is constant when travelling at a certain speed point, speed pickup is write down this speed point, and the speed of mensuration and constant moment of torsion multiply each other and can draw the driving wheel output power of tested automobile at a certain constant-torque.
3. operating condition method is tested tail gas
4. check the automobile slide performance
Slide test and can not use automobile.In advance in industrial computer the parameters of the tested vehicle of input and setting slide initial velocity, begin the slide process of simulated automotive on actual road surface by native system, by loading control control motor and Frequency Converter Control blower fan, the driving cycle of simulated automotive.When the rotating speed of motor-driven rotary drum reached initialization, speed pickup was sent in the industrial computer after measuring, and industrial computer output steering order makes loading control and frequency converter apply corresponding resistance, slided the test beginning, stopped operating until rotary drum, slided end.Slide in the process whole, be changed to for zero time by initial velocity, and the corresponding resistance size that simulates, can check the sliding performance of automobile by testing vehicle.
5. check the automobile acceleration
This process is roughly opposite with function 4, in advance initial velocity and the termination speed that the input automobile quickens in industrial computer.Begin the slide process of simulated automotive on actual road surface by native system, when the speed of a motor vehicle reaches initial velocity, speed pickup is sent in the industrial computer after measuring, and industrial computer output steering order makes loading control and frequency converter apply corresponding resistance, and accelerated test begins.At this moment, driver's steering vehicle quickens with the fastest speed, and when the speed of a motor vehicle reached termination speed, accelerated test finished automatically, and native system is preserved the data of experiment overall process.In whole accelerator, be changed to the time of termination speed by testing vehicle by initial velocity, and the corresponding resistance size that simulates, can check the acceleration of automobile.
6. verification speedometer
When automobile travels with a certain constant rate of speed, obtain vehicle speed data accurately by the speed pickup of native system, the conversion speed of a motor vehicle then repeats, and as benchmark, automotive speedometer is carried out verification.
7. test oil consumption
Can select " test on time " and " test by measure " oil consumption.(the fuel consumption meter here belongs to other analog sensors to connect fuel consumption meter steadily, can insert untapped pin in the signal condition module) after, the driver controls throttle, drive a car and on chassis dynamometer, travel with a certain constant rate of speed, when arrive to set time/during capacity, native system can be converted to test result the fuel consumption per hundred kilometers of standard.
8. test data analyzer
Gather and keep data in the process of the test in real time, by analysis software formation curve figure, print the experiment form that complies with the national standard requirements at last comprising speed time curve, speed displacement curve, power speed curves, moment of torsion speed curves, oil consumption curve etc.
Claims (7)
1. dynamometer system for motorcar chassis, it is characterized in that including the signal condition module, data collecting card, industrial computer, frequency converter, loading control, chassis dynamometer, sensor, direct current generator and blower fan, the input end of signal condition module is connected with chassis dynamometer by sensor, its output terminal is connected with the input end of data acquisition fixture block, the output terminal of data collecting card is connected with industrial computer, signal condition module controls output terminal also is connected with the loading control that is connected with direct current generator with the frequency converter that is connected with blower fan simultaneously, and loading control is connected to chassis dynamometer by direct current generator;
Described sensor comprises the speed pickup that is used to gather the torque sensor of torque signal and is used for the picking rate signal, described torque sensor and speed pickup are sent to the signal condition module with torque signal and the rate signal of being gathered as original signal, described signal condition module is used for the original signal that receives is handled, and export to data collecting card, described data collecting card becomes the conversion of signals that receives digital signal and is sent to industrial computer, described industrial computer carries out computing to the digital signal that receives, draw the driving wheel performance number, and draw steering order according to result of calculation, and industrial computer feeds back to data collecting card with steering order, data collecting card sends steering order by the signal condition module to loading control and frequency converter with signal condition module switching signal again, so that loading control is regulated direct current generator and make frequency converter regulate blower fan.
2. dynamometer system for motorcar chassis according to claim 1, it is characterized in that, described torque signal and rate signal are obtaining torque value and velocity amplitude through behind signal condition module and the data collecting card, and described industrial computer multiplies each other torque value and velocity amplitude and obtains the driving wheel performance number.
3. dynamometer system for motorcar chassis according to claim 1 is characterized in that described sensor also comprises the flowmeter that is used to test the fuel consumption meter of oil consumption and/or is used to test exhaust flow.
4. dynamometer system for motorcar chassis according to claim 1 is characterized in that described chassis dynamometer adopts the double rotating drum chassis dynamometer.
5. dynamometer system for motorcar chassis according to claim 1 is characterized in that loading control adopts electric feedback loading controller, can drag rotary drum is counter, and rotary drum can instead drag starting.
6. dynamometer system for motorcar chassis according to claim 1 is characterized in that having man machine operation interface to be connected with the signal condition module.
7. dynamometer system for motorcar chassis according to claim 1 is characterized in that the data collecting card employing has the data collecting card of the sampling rate of 12 precision, 200K, 16 road analog input channels, 2 tunnel analog output channels, 8 way word output channels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101040055A CN100419402C (en) | 2004-12-30 | 2004-12-30 | Dynamometer system for motorcar chassis |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101040055A CN100419402C (en) | 2004-12-30 | 2004-12-30 | Dynamometer system for motorcar chassis |
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| CN1796964A CN1796964A (en) | 2006-07-05 |
| CN100419402C true CN100419402C (en) | 2008-09-17 |
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| CNB2004101040055A Active CN100419402C (en) | 2004-12-30 | 2004-12-30 | Dynamometer system for motorcar chassis |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893467A (en) * | 2010-07-28 | 2010-11-24 | 康明斯东亚研发有限公司 | Method for measuring fuel consumption of medium and heavy vehicles |
| CN101666715B (en) * | 2009-10-16 | 2011-12-14 | 湘潭科达电工专用成套设备有限责任公司 | Load running-in test bench for tractor and auto chassis and running-in technology thereof |
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| CN101995338B (en) * | 2009-08-18 | 2012-05-02 | 北汽福田汽车股份有限公司 | Test system and method for traction performance of automobiles |
| JP5206823B2 (en) * | 2011-03-04 | 2013-06-12 | 株式会社明電舎 | Operation display device for chassis dynamometer system |
| CN102426103B (en) * | 2011-08-23 | 2014-03-12 | 中国北方车辆研究所 | High-temperature environment simulation test system of commercial vehicle |
| CN103105781B (en) * | 2013-03-04 | 2016-06-15 | 北京理工大学 | Multiaxis individual motor Chassis dynamometer system roadload simulation loading method and system |
| CN107918585B (en) * | 2016-10-07 | 2023-05-02 | 福特全球技术公司 | Method and device for testing software program |
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| CN111238692A (en) * | 2020-03-11 | 2020-06-05 | 四川建安工业有限责任公司 | Stress monitoring system for automobile chassis parts |
| CN112379193B (en) * | 2020-10-27 | 2022-02-08 | 山东大学 | Method for testing system precision of simple transient working condition method |
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Patent Citations (4)
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| US5542290A (en) * | 1991-06-24 | 1996-08-06 | Kabushiki Kaisha Meidensha | Control system for chassis dynamometer for simulating road test of automotive vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101666715B (en) * | 2009-10-16 | 2011-12-14 | 湘潭科达电工专用成套设备有限责任公司 | Load running-in test bench for tractor and auto chassis and running-in technology thereof |
| CN101893467A (en) * | 2010-07-28 | 2010-11-24 | 康明斯东亚研发有限公司 | Method for measuring fuel consumption of medium and heavy vehicles |
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| CN1796964A (en) | 2006-07-05 |
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