CN106525452A - Method and system for testing heat fading performance - Google Patents
Method and system for testing heat fading performance Download PDFInfo
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- CN106525452A CN106525452A CN201611013544.7A CN201611013544A CN106525452A CN 106525452 A CN106525452 A CN 106525452A CN 201611013544 A CN201611013544 A CN 201611013544A CN 106525452 A CN106525452 A CN 106525452A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Regulating Braking Force (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a test system and test method for heat fading performance detection. The test method includes controlling a rotation device on a rotating hub testbed to cooperate with wheels of an automobile, and controlling the rotation device to rotate at uniform speed; collecting a temperature signal sent by a temperature sensor and a first pressure signal sent by a first pressure sensor; controlling the starting moment and ending moment of a test according to the temperature signal, and obtaining first wheel edge force and second wheel edge force separately; and calculating according to the first wheel edge force, second wheel edge force and first pressure signal to obtain a heat fading rate. The method for testing the heat fading performance provided by the invention realizes relatively high consistency with actual heat fading performance in the test, thereby guaranteeing test accuracy; and at the same time, through the arrangement of the rotating hub testbed, the test system provided by the invention solves the problem in the prior art that a test result is inaccurate due to factors such as a test site and environment.
Description
Technical field
The present invention relates to automobile technical field, more particularly to a kind of method of testing and test system of character of heat-fading energy.
Background technology
The heat fading of brake efficiency refers to that brake strip temperature influence occurs a series of physicochemical change, makes
The coefficient of friction of brake diminishes, and moment of friction is reduced, and then causes the brake efficiency of automobile to decline.
Friction plate has been cured substantial amounts of specific Organic substance in process of production, when brake operation temperature is more than a constant temperature
When spending, the Organic substance in friction plate understands decomposes, and produced gas and liquid are between friction plate and brake drum or brake disc
It is full of, plays lubrication, but while the coefficient of friction for also resulting in friction plate diminishes, moment of friction is significantly reduced, that is, occur
Brake efficiency heat fading problem, if heat fading rate can not meet the requirement of each operating mode during running car, is easily caused automobile and loses system
Kinetic force, cause a traffic accident accident.
In prior art to character of heat-fading can test generally with an auxiliary brake as test object, the result pair tested
Car load brake-fade performance characterization is inaccurate, the goodness of fit is not high；Additionally, during with all brakes of car load as object of study,
Generally implement road immobilization test, but as the factors such as test site, weather, environment, equipment and safety are to brake temperature side
There is certain limitation in the research in face, can lower the reliability of test data.
The content of the invention
It is an object of the invention to provide the method for testing and test system of a kind of character of heat-fading energy, to solve above-mentioned existing skill
Problem in art, it is ensured that the accuracy of test.
Method of testing of the instinct invention there is provided a kind of character of heat-fading energy, it is characterised in that comprise the steps：
Tumbler on control revolving drum test table is coordinated with the wheel of automobile, and controls the tumbler with first turn
Fast uniform rotation；
The first pressure signal that the temperature signal and first pressure sensor that collecting temperature sensor sends sends；According to institute
The Startup time and end time of temperature signal control test are stated, and obtains first round power in power and the second wheel respectively；
According to the first round, in power, second wheel, power and the first pressure signal of change obtain heat fading rate.
Method of testing as above, these, it is preferred to, temperature signal and the first pressure that collecting temperature sensor sends
The first pressure signal that force transducer sends；The Startup time and end time of test are controlled according to the temperature signal, and is divided
Not Huo Qu the first round while power and second wheel while power specifically include：
When judging that the temperature signal reaches the first temperature value, start test, and obtain first round side power；
Judge whether the temperature signal reaches second temperature value；
If it is, terminating test, and obtain the second wheel side power.
Method of testing as above, these, it is preferred to, according to the first round in power, the second wheel power and described
First pressure signal of change obtains heat fading rate and specifically includes following steps：
First heat fading coefficient and the end of test moment of test start time are determined respectively according to heat fading coefficient equation
The second heat fading coefficient, the heat fading coefficient equation is：
ηa=Fa/p
ηb=Fb/p
Wherein, ηaFor the first heat fading coefficient, ηbFor the second heat fading coefficient, FaFor first round side power, FbFor the second wheel side
Power, p are brake piping pressure；
Heat fading rate is determined according to heat fading rate equation, the heat fading equation is：
δ=ηa/ηb
Wherein, δ is heat fading rate.
Method of testing as above, these, it is preferred to, judging it is warm whether the temperature signal reaches described second
After angle value, the method for testing also includes：
If not, judging the testing time whether setting value of over-time；
If the testing time exceedes the setting value of the time, terminate after testing the time for being set, and
Obtain second and take turns side power.
Method of testing as above, these, it is preferred to, in the step " temperature signal that collecting temperature sensor sends
The first pressure signal sent with first pressure sensor；When controlling the Startup time of test and terminate according to the temperature signal
Carve, and obtain first round power in power and the second wheel respectively " also include step before：The tumbler is controlled with the second rotating speed
Uniform rotation, to preheat to testing automobile.
Present invention also offers a kind of test system of character of heat-fading energy, wherein, including：
Revolving drum test table, is provided with the tumbler matched with automotive wheel on the revolving drum test table；
Temperature sensor, the temperature sensor are fixedly installed in the brake of automobile；
First pressure sensor, the first pressure sensor are fixedly installed on the brake piping of automobile；
The first pressure that main control module, the temperature signal sent for collecting temperature sensor and first pressure sensor send
Force signal；The Startup time and end time of test are controlled according to the temperature signal, and obtains first round side power and the respectively
Two wheel side power；According to the first round, in power, second wheel, power and the first pressure signal of change obtain heat fading rate.
Test system as above, these, it is preferred to, the main control module includes：
First judging unit, for judging, when the temperature signal reaches the first temperature value, to start test, and obtain the
One wheel side power；
Second judging unit, for judging whether the temperature signal reaches second temperature value, if it is, terminating surveying
Examination, and obtain the second wheel side power；
3rd judging unit, for judging the testing time whether setting value of over-time, if it is, test is carried out
Terminate after the time of setting.
Test system as above, these, it is preferred to, the temperature sensor includes front-wheel temperature sensor with after
Wheel temperature sensor；
The front-wheel temperature sensor is fixedly installed on the front wheel brake of automobile；
The trailing wheel temperature sensor is fixedly installed on the rear wheel brake of automobile.
Test system as above, these, it is preferred to, also including second pressure sensor, the second pressure is passed
Sensor is fixedly installed on the brake pedal of automobile.
Test system as above, these, it is preferred to, also including angular displacement sensor, the angular displacement sensor
It is fixedly installed on the brake pedal.
The test system of the character of heat-fading energy that the present invention is provided, by arranging revolving drum test table, solves in prior art
The factors such as place, environment that are put to the test and cause the inaccurate problem of result of the test；Meanwhile, heat fading provided in an embodiment of the present invention
The method of testing of performance, realizes the concordance that test can be higher with actual middle character of heat-fading, it is ensured that the degree of accuracy of test.
Description of the drawings
Fig. 1 is the flow chart of method of testing provided in an embodiment of the present invention；
Fig. 2 is the state diagram that automotive wheel and the tumbler on revolving drum test table coordinate；
Structural representations of the Fig. 3 for brake system of car；
Fig. 4 is assembled to the state diagram on brake piping for first pressure sensor；
Fig. 5 is that second pressure sensor and angular displacement sensor are arranged on the structural representation on brake pedal.
Description of reference numerals：
100- revolving drum test table 110- tumbler 200- wheels
210- front wheel brake 220- rear wheel brake 230- brake pipings
300- brake pedal 310- second pressure sensor 320- angular displacement sensors
400- first pressure sensor 410- threeways
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
Fig. 1 is the flow chart of method of testing provided in an embodiment of the present invention.
As shown in figure 1, a kind of method of testing of character of heat-fading energy is embodiments provided, wherein, including following step
Suddenly：
The wheel of tumbler and automobile on S200, control revolving drum test table coordinates, and controls tumbler with first
Rotating speed uniform rotation；In embodiments of the present invention, first rotating speed can be 20km/h.
Step can also be included before step S200：
S100, control tumbler with the second rotating speed uniform rotation, to preheat to testing automobile.
It should be noted that carry out preheating the preheating time with setting to testing automobile, in the enforcement that the present invention is provided
In example, the preheating time is 40min；And second rotating speed can be 80km/h, with ensure setting preheating time in complete heat
Car, and preferable hot car effect is reached, in order to test.
The first pressure signal that the temperature signal and first pressure sensor that S300, collecting temperature sensor send sends；
The Startup time and end time of test are controlled according to temperature signal, and obtains first round power in power and the second wheel respectively.
It should be noted that in process of the test is carried out, electromotor keeps the state of idling, brake piping is made to keep setting
Pressure, in embodiments of the present invention, the pressure that this sets as 30bar, can be examined by first pressure sensor by the pressure values
Measure.
It is understood that can be by way of trampling brake pedal controlling the pressure on brake piping.
Step S300 can specifically include：
S310, when judging that temperature signal reaches the first temperature value, start test, and obtain first round side power；Judge temperature
Whether signal reaches second temperature value, if it is, terminating test, and obtains the second wheel side power.
Specifically, in embodiments of the present invention, first temperature value can be 70 DEG C, when brake temperature reach this first
During temperature value, then start to carry out automobile the detection of character of heat-fading energy.
S320, after judging whether temperature signal reaches second temperature value, method of testing also includes：
If not, judging the testing time whether setting value of over-time；
If the setting value of testing time over-time, terminate after testing the time for being set, and obtain second
Wheel side power.
It should be noted that the material of friction plate that the testing time can be used according to automobile is set, preferably
, the testing time can be set as 10min, if the testing time has exceeded 10min and has not still reached second temperature value,
Then test and stop after 10min has been carried out.
S400, according to the first round while power, second wheel while power and first pressure signal of change obtain heat fading rate.
Specifically, according to the first round, in power, the second wheel, power and first pressure signal of change acquisition heat fading rate are specifically wrapped
Include following steps：
First heat fading coefficient and the end of test moment of test start time are determined respectively according to heat fading coefficient equation
The second heat fading coefficient, heat fading coefficient equation is：
ηa=Fa/p
ηb=Fb/p
Wherein, ηaFor the first heat fading coefficient, ηbFor the second heat fading coefficient, FaFor first round side power, FbFor the second wheel side
Power, p are brake piping pressure；
Heat fading rate is determined according to heat fading rate equation, heat fading equation is：
δ=ηa/ηb
Wherein, δ is heat fading rate.
Fig. 2 is the state diagram that automotive wheel and the tumbler on revolving drum test table coordinate, and Fig. 3 is brake system of car
Structural representation, Fig. 4 are assembled to the state diagram on brake piping for first pressure sensor.
Referring to Fig. 2 and Fig. 4, the embodiment of the present invention additionally provides a kind of test system of character of heat-fading energy, the survey
Test system is used for the method for testing for implementing character of heat-fading energy provided in an embodiment of the present invention, including revolving drum test table 100, temperature
Degree sensor, first pressure sensor 400 and main control module；Wherein, it is provided with revolving drum test table 100 and automotive wheel 200
The tumbler 110 of matching；Temperature sensor is fixedly installed in the brake of automobile；First pressure sensor 400 is fixed and is set
Put on the brake piping 230 of automobile；Main control module is used for temperature signal and the first pressure biography that collecting temperature sensor sends
The first pressure signal that sensor 400 sends；The Startup time and end time of test are controlled according to temperature signal, and is obtained respectively
First round power in power and the second wheel；According to the first round, in power, the second wheel, power and first pressure signal of change obtain heat fading
Rate.
Further, temperature sensor includes front-wheel temperature sensor and trailing wheel temperature sensor；Front-wheel temperature sensor
It is fixedly installed on the front wheel brake 210 of automobile；Trailing wheel temperature sensor is fixedly installed on the rear wheel brake 220 of automobile
On, it is possible thereby to respectively the front wheels and rear wheels of automobile are tested, by front wheels and rear wheels are individually tested, before can excluding
Wheel and trailing wheel between interfere factor, make test data more accurate.
It should be noted that with reference to Fig. 4, first pressure sensor 400 can be fixedly mounted on brake pipe by threeway 410
On road 230.
Further, main control module includes the first judging unit, the second judging unit and the 3rd judging unit；Wherein,
One judging unit is used to judge, when temperature signal reaches the first temperature value, to start test, and obtain first round side power；Second sentences
Disconnected unit is used to judge whether temperature signal reaches second temperature value, if it is, termination test, and obtain the second wheel side power；
3rd judging unit, for judging the testing time whether setting value of over-time, if it is, test set when
Between after terminate.
Fig. 5 is that second pressure sensor and angular displacement sensor are arranged on the structural representation on brake pedal.
Further, as shown in figure 5, test system provided in an embodiment of the present invention can also include second pressure sensor
310, second pressure sensor 310 is fixedly installed on the brake pedal 300 of automobile, can pass through second pressure sensor 310
Control is applied to the power of brake pedal 300, and then controls the pressure suffered by brake piping 230, the pressure suffered by brake piping 230
Can be simultaneously displayed on first pressure sensor 400 with pressure.
Further, as shown in figure 5, in order to control the angle that brake pedal 300 rotates, survey provided in an embodiment of the present invention
Test system can also also include angular displacement sensor 320, and angular displacement sensor 320 is fixedly installed on brake pedal 300.
Further, test system provided in an embodiment of the present invention can also include blower fan, and the wind speed and automobile of blower fan
Travel speed be consistent, the resistance of the wind to be subject to during simulated automotive actual travel, so ensure test it is accurate
Property.
The test system of character of heat-fading energy provided in an embodiment of the present invention, by arranging revolving drum test table, solves existing
The factors such as place, environment that are put to the test in technology and cause the inaccurate problem of result of the test；Meanwhile, it is provided in an embodiment of the present invention
The method of testing of character of heat-fading energy, realizes the concordance that test can be higher with actual middle character of heat-fading, it is ensured that test
Degree of accuracy.
Construction, feature and the action effect of the present invention, above institute is described in detail above according to the embodiment shown in schema
Only presently preferred embodiments of the present invention is stated, but the present invention is not to limit practical range shown in drawing, it is every according to structure of the invention
Want made change, or be revised as the Equivalent embodiments of equivalent variations, when still covered with diagram without departing from description spiritual,
All should be within the scope of the present invention.
Claims (10)
1. a kind of character of heat-fading can method of testing, it is characterised in that comprise the steps：
Tumbler on control revolving drum test table is coordinated with the wheel of automobile, and it is even with the first rotating speed to control the tumbler
Speed is rotated；
The first pressure signal that the temperature signal and first pressure sensor that collecting temperature sensor sends sends；According to the temperature
The Startup time and end time of degree signal control test, and first round power in power and the second wheel is obtained respectively；
According to the first round, in power, second wheel, power and the first pressure signal of change obtain heat fading rate.
2. method of testing according to claim 1, it is characterised in that temperature signal that collecting temperature sensor sends and the
The first pressure signal that one pressure transducer sends；The Startup time and end time of test are controlled according to the temperature signal,
And acquisition first round power in power and the second wheel is specifically included respectively：
When judging that the temperature signal reaches the first temperature value, start test, and obtain first round side power；
Judge whether the temperature signal reaches second temperature value；
If it is, terminating test, and obtain the second wheel side power.
3. method of testing according to claim 1, it is characterised in that according to the first round in power, the second wheel power and
The first pressure signal of change obtains heat fading rate and specifically includes following steps：
The first heat fading coefficient of test start time and the of the end of test moment is determined respectively according to heat fading coefficient equation
Two heat fading coefficients, the heat fading coefficient equation is：
ηa=Fa/p
ηb=Fb/p
Wherein, ηaFor the first heat fading coefficient, ηbFor the second heat fading coefficient, FaFor first round side power, FbFor the second wheel side power, p
For brake piping pressure；
Heat fading rate is determined according to heat fading rate equation, the heat fading equation is：
δ=ηa/ηb
Wherein, δ is heat fading rate.
4. method of testing according to claim 2, it is characterised in that judging whether the temperature signal reaches described
After two temperature values, the method for testing also includes：
If not, judging the testing time whether setting value of over-time；
If the testing time exceedes the setting value of the time, terminate after testing the time for being set, and obtain
Second wheel side power.
5. method of testing according to claim 1, it is characterised in that in the step " temperature that collecting temperature sensor sends
The first pressure signal that signal and first pressure sensor send；Startup time and the end of test are controlled according to the temperature signal
Also include step before the only moment, and acquisition first round power in power and the second wheel respectively "：The tumbler is controlled with second
Rotating speed uniform rotation, to preheat to testing automobile.
6. a kind of character of heat-fading can test system, it is characterised in that the test system is used to implementing claim 1-5 arbitrary
Method of testing described in, including：
Revolving drum test table, is provided with the tumbler matched with automotive wheel on the revolving drum test table；
Temperature sensor, the temperature sensor are fixedly installed in the brake of automobile；
First pressure sensor, the first pressure sensor are fixedly installed on the brake piping of automobile；
The first pressure letter that main control module, the temperature signal sent for collecting temperature sensor and first pressure sensor send
Number；The Startup time and end time of test are controlled according to the temperature signal, and obtains first round side power and the second wheel respectively
Bian Li；According to the first round, in power, second wheel, power and the first pressure signal of change obtain heat fading rate.
7. test system according to claim 6, it is characterised in that the main control module includes：
First judging unit, for judging, when the temperature signal reaches the first temperature value, to start test, and obtain the first round
Bian Li；
Second judging unit, for judging whether the temperature signal reaches second temperature value, if it is, terminate test, and
Obtain second and take turns side power；
3rd judging unit, for judging the testing time whether setting value of over-time, if it is, test is set
Time after terminate.
8. test system according to claim 6, it is characterised in that the temperature sensor includes front-wheel temperature sensor
With trailing wheel temperature sensor；
The front-wheel temperature sensor is fixedly installed on the front wheel brake of automobile；
The trailing wheel temperature sensor is fixedly installed on the rear wheel brake of automobile.
9. test system according to claim 6, it is characterised in that also including second pressure sensor, second pressure
Force transducer is fixedly installed on the brake pedal of automobile.
10. test system according to claim 6, it is characterised in that also including angular displacement sensor, the angular displacement are passed
Sensor is fixedly installed on the brake pedal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611013544.7A CN106525452B (en) | 2016-11-17 | 2016-11-17 | The test method and test macro of character of heat-fading energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611013544.7A CN106525452B (en) | 2016-11-17 | 2016-11-17 | The test method and test macro of character of heat-fading energy |
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| CN106525452A true CN106525452A (en) | 2017-03-22 |
| CN106525452B CN106525452B (en) | 2019-05-28 |
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| CN109738203A (en) * | 2018-12-29 | 2019-05-10 | 北京新能源汽车股份有限公司 | The test method of brake test device and automatic driving vehicle dynamic brake performance |
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| CN114878182A (en) * | 2022-04-29 | 2022-08-09 | 东风汽车股份有限公司 | Automobile brake system heat fading performance test method |
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| CN114878182B (en) * | 2022-04-29 | 2024-04-09 | 东风汽车股份有限公司 | Heat fading performance test method for automobile brake system |
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