CN104848923A - Vehicle load detection method and detection device - Google Patents
Vehicle load detection method and detection device Download PDFInfo
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- CN104848923A CN104848923A CN201410186243.9A CN201410186243A CN104848923A CN 104848923 A CN104848923 A CN 104848923A CN 201410186243 A CN201410186243 A CN 201410186243A CN 104848923 A CN104848923 A CN 104848923A
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Abstract
The invention discloses a vehicle load detection method and a vehicle load detection device. The detection method comprises the steps of: S1) detecting an acceleration a of a vehicle; S2) calculating an acceleration resistance Fj of the vehicle; S3) calculating the mass m of the whole vehicle according to the acceleration a of the vehicle and the acceleration resistance Fj of the vehicle; and S4) calculating a vehicle load according to the mass m of the whole vehicle. The vehicle load detection method and vehicle load detection device provided by the invention can help a driver to detect the mass of the whole vehicle, the problem of overloading is prevented, the vehicle is effectively protected, the service lifetimes of the vehicle and parts are prolonged, and the maintenance cost is reduced; in addition, the vehicle load detection device provided by the invention is simple in structure, convenient to maintain and manufacture, and applicable to a lorry of any structure.
Description
Technical field
The present invention relates to load-carrying vehicle and travel field, particularly, relate to a kind of detection method of carload and a kind of pick-up unit of carload.
Background technology
At present for the detection of vehicle load, driver, except weighing load-carrying, does not have better method to calculate vehicle load, but some loads not easily weigh sometimes, may overload of vehicle be caused, greatly consume the serviceable life of vehicle and parts, add maintenance cost.And when the vehicle is running, because overload may cause great injury to the communal facility such as highway, bridge, even cause danger.
Summary of the invention
The object of this invention is to provide a kind of detection method of carload and a kind of pick-up unit of carload, driver can be helped to detect the quality of car load, prevent the problem overloaded, effectively protect vehicle.
To achieve these goals, the invention provides a kind of detection method of carload, this detection method comprises the following steps: S1) detect the acceleration a of vehicle; S2) the acceleration resistance F of vehicle is calculated
j; S3) according to the acceleration a of described vehicle and the acceleration resistance F of described vehicle
jcalculate complete vehicle quality m; And S4) calculate described carload according to described complete vehicle quality m.
Particularly, the acceleration resistance F of described vehicle
jby following formulae discovery: F
j=F
t-F
f-F
w-F
i, wherein F
tfor the driving force of vehicle, F
ffor the resistance to rolling of vehicle, F
wfor the air resistance of vehicle, F
ifor the grade resistance of vehicle.
Wherein, the driving force Ft of described vehicle is by following formulae discovery:
wherein T
tqfor motor torque, i
gfor transmission ratio, i
0for final driver ratio, η
tfor the mechanical efficiency of power train, r is the radius of wheel of vehicle; The resistance to rolling F of described vehicle
fby following formulae discovery: F
f=Wf, wherein W gravity suffered by the tire of vehicle, f is coefficient of rolling resistance; The air resistance F of described vehicle
wby following formulae discovery:
wherein C
dfor coefficient of air resistance, A is front face area, and ρ is atmospheric density, u
rfor the relative velocity of vehicle and wind; And the grade resistance F of described vehicle
iby following formulae discovery: F
i=Gsin α, wherein G is the gravity of vehicle, and α is ground inclination.
Wherein, described coefficient of rolling resistance f is by following formulae discovery: f=0.0076+0.000056u
a, wherein u
afor the speed of a motor vehicle of vehicle.
Wherein, described complete vehicle quality m is by following formulae discovery:
wherein δ is correction coefficient of rotating mass.
The present invention also provides a kind of pick-up unit of carload, and this pick-up unit comprises acceleration transducer, for detecting the acceleration a of vehicle; And controller, be connected with acceleration transducer, for calculate vehicle acceleration resistance Fj, calculate complete vehicle quality m according to the acceleration resistance Fj of the acceleration a of described vehicle and described vehicle and calculate described carload according to described complete vehicle quality m.
Particularly, the acceleration resistance Fj of described vehicle is by following formulae discovery: F
j=F
t-F
f-F
w-F
i, wherein F
tfor the driving force of vehicle, F
ffor the resistance to rolling of vehicle, F
wfor the air resistance of vehicle, F
ifor the grade resistance of vehicle.
Wherein, the driving force F of described vehicle
tby following formulae discovery:
wherein T
tqfor motor torque, i
gfor transmission ratio, i
0for final driver ratio, η
tfor the mechanical efficiency of power train, r is the radius of wheel of vehicle; The resistance to rolling F of described vehicle
fby following formulae discovery: F
f=Wf, wherein W gravity suffered by the tire of vehicle, f is coefficient of rolling resistance; The air resistance F of described vehicle
wby following formulae discovery:
wherein C
dfor coefficient of air resistance, A is front face area, and ρ is atmospheric density, u
rfor the relative velocity of vehicle and wind; And the grade resistance F of described vehicle
iby following formulae discovery: F
i=Gsin α, wherein G is the gravity of vehicle, and α is ground inclination.
Wherein, described coefficient of rolling resistance f is by following formulae discovery: f=0.0076+0.000056u
a, wherein u
afor the speed of a motor vehicle of vehicle.
Wherein, described complete vehicle quality m is by following formulae discovery:
wherein δ is correction coefficient of rotating mass.
By technique scheme, first the present invention detects the acceleration a of vehicle, then according to the driving force F of the vehicle calculated
t, vehicle resistance to rolling F
f, vehicle air resistance F
w, vehicle grade resistance F
idraw the acceleration resistance F of vehicle
j, thus according to the acceleration a of vehicle and the acceleration resistance F of vehicle
jcalculate the quality m of car load, and calculate the load of vehicle by the quality m of car load.
By the detection method of carload provided by the invention and the pick-up unit of carload; driver can be helped to detect the quality of car load; prevent the problem overloaded; effectively protect vehicle; improve the serviceable life of vehicle and parts, reduce maintenance cost, the structure of the detecting device of carload of the present invention is simple simultaneously; keep in repair easily manufactured, the truck of any structure can be applied to.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the process flow diagram of the detection method of carload provided by the invention; And
Fig. 2 is the structural representation of the pick-up unit of carload provided by the invention.
Description of reference numerals
1 acceleration transducer
2 controllers
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
Fig. 1 is the process flow diagram of the detection method of carload provided by the invention.As shown in Figure 1, the detection method of carload provided by the invention comprises the following steps: S1) detect the acceleration a of vehicle; S2) the acceleration resistance F of vehicle is calculated
j; S3) according to the acceleration a of vehicle and the acceleration resistance F of vehicle
jcalculate complete vehicle quality m; And S4) calculate described carload according to described complete vehicle quality m.
Basic method of the present invention is that the quality of the classical mechanics formulae discovery car load utilizing Newton second law F=ma is (when cargo, complete vehicle quality is quality and the cargo mass sum of vehicle itself), and after calculating the quality m of car load, deduct known vehicle mass thus draw the load of vehicle.Therefore need to detect the acceleration a of vehicle and calculate the acceleration resistance F of vehicle
j.But because of vehicle in the process of moving, have the impact of the factor such as landform and weather, therefore the present invention calculates acceleration resistance F
jin time, needs to consider that numerous resistance acts on simultaneously.
Particularly, in step S2) in, the acceleration resistance F of vehicle can pass through following formulae discovery: F
j=F
t-F
f-F
w-F
i, wherein F
tfor the driving force of vehicle, F
ffor the resistance to rolling of vehicle, F
wfor the air resistance of vehicle, F
ifor the grade resistance of vehicle.
As the driving force F of vehicle
tequal the resistance to rolling F of vehicle
f, vehicle air resistance F
wwith the grade resistance F of vehicle
iduring sum, the acceleration of vehicle is 0, as the driving force F of vehicle
tbe not equal to the resistance to rolling F of vehicle
f, vehicle air resistance F
wwith the grade resistance F of vehicle
iduring sum, vehicle produces acceleration.Therefore, primary goal of the present invention needs the driving force F calculating vehicle
twith the resistance to rolling F of vehicle
f, vehicle air resistance F
wwith the grade resistance F of vehicle
ithe difference of three's sum is to obtain the acceleration resistance F of vehicle
j.
The driving force F of vehicle
tcan following formulae discovery be passed through:
wherein T
tqfor motor torque, i
gfor transmission ratio, i
0for final driver ratio, η
tfor the mechanical efficiency of power train, r is the radius of wheel of vehicle.Motor torque T
tqreal-time Obtaining can be carried out, transmission ratio i by engine
g, final driver ratio i
0, power train mechanical efficiency η
teach car had to the fixed value of its correspondence with the radius of wheel r of vehicle, can pre-enter.
The rigidity friction of the resistance to rolling of vehicle mainly tire and bottom surface causes, and therefore the resistance to rolling Ff of vehicle can pass through following formulae discovery: F
f=Wf, wherein W gravity suffered by the tire of vehicle, f is coefficient of rolling resistance.Gravity W suffered by tire can be obtained by the sensor of tire, and described coefficient of rolling resistance f is by following formulae discovery: f=0.0076+0.000056u
a, wherein u
afor the speed of a motor vehicle of vehicle, speed of a motor vehicle u
acan be detected by vehicle speed sensor.
The air resistance F of vehicle
wcan following formulae discovery be passed through:
wherein C
dfor coefficient of air resistance, A is front face area, and ρ is atmospheric density, u
rfor the relative velocity of vehicle and wind.Each car has different coefficient of air resistance C
dwith front face area A, can measure in advance and input, atmospheric density ρ has fixed value under concrete height above sea level and temperature, the relative velocity u of vehicle and wind
rthe speed of vehicle and wind speed can be utilized to obtain by calculating.
The grade resistance F of vehicle
ifollowing formulae discovery: F can be passed through
i=Gsin α, wherein G is the gravity of vehicle, and α is ground inclination.The gravity G of vehicle and ground inclination α all can be obtained by sensor measurement.
Automobile, when giving it the gun, needs inertial force when overcoming its quality accelerated motion.The quality of automobile is divided into translatory mass and gyrating mass two parts.During acceleration, not only to overcome the inertial force that automobile translation quality produces in accelerator, also will overcome the inertial force that gyrating mass produces simultaneously.For the ease of calculating, generally the inertial force of gyrating mass is converted into the inertial force of translatory mass.Therefore complete vehicle quality m can pass through following formulae discovery:
wherein δ is correction coefficient of rotating mass.This correction coefficient of rotating mass δ has fixed value for each car, can pre-enter.
Fig. 2 is the structural representation of the pick-up unit of carload provided by the invention.As shown in Figure 2, the pick-up unit of carload provided by the invention comprises acceleration transducer 1, for detecting the acceleration a of vehicle; And controller 2, be connected with acceleration transducer, for calculating the acceleration resistance F of vehicle
j, according to the acceleration a of described vehicle and the acceleration resistance F of described vehicle
jcalculate complete vehicle quality m and calculate described carload according to described complete vehicle quality m.
The present invention's degree of will speed up sensor 1 is arranged on the centroid position of vehicle, and utilizes acceleration transducer 1 to detect the acceleration a of vehicle, controller 2 according to the program pre-set, by calculating the resistance of vehicle and driving force to obtain the acceleration resistance F of vehicle
j, thus the quality m of car load is calculated according to the acceleration a of vehicle and the acceleration resistance Fj of vehicle, and the load of vehicle is calculated by the quality m of car load.
Particularly, the acceleration resistance F of described vehicle
jfollowing formulae discovery: F can be passed through
j=F
t-F
f-F
w-F
i, wherein F
tfor the driving force of vehicle, F
ffor the resistance to rolling of vehicle, F
wfor the air resistance of vehicle, F
ifor the grade resistance of vehicle.
The driving force F of vehicle
tcan following formulae discovery be passed through:
wherein T
tqfor motor torque, i
gfor transmission ratio, i
0for final driver ratio, η
tfor the mechanical efficiency of power train, r is the radius of wheel of vehicle.Motor torque T
tqreal-time Obtaining can be carried out, transmission ratio i by engine
g, final driver ratio i
0, power train mechanical efficiency η
teach car had to the fixed value of its correspondence with the radius of wheel r of vehicle, can pre-enter in controller 2.
The rigidity friction of the resistance to rolling of vehicle mainly tire and bottom surface causes, the therefore resistance to rolling F of vehicle
ffollowing formulae discovery: F can be passed through
f=Wf, wherein W gravity suffered by the tire of vehicle, f is coefficient of rolling resistance.Gravity W suffered by tire can be obtained by the sensor of tire, and described coefficient of rolling resistance f is by following formulae discovery: f=0.0076+0.000056u
a, wherein u
afor the speed of a motor vehicle of vehicle, speed of a motor vehicle u
acan be detected by vehicle speed sensor.
The air resistance F of vehicle
wcan following formulae discovery be passed through:
wherein C
dfor coefficient of air resistance, A is front face area, and ρ is atmospheric density, u
rfor the relative velocity of vehicle and wind.Each car has different coefficient of air resistance C
dwith front face area A, can measure in advance and input, atmospheric density ρ has fixed value under concrete height above sea level and temperature, the relative velocity u of vehicle and wind
rthe speed of vehicle and wind speed can be utilized to obtain by calculating.
The grade resistance F of vehicle
ifollowing formulae discovery: F can be passed through
i=Gsin α, wherein G is the gravity of vehicle, and α is ground inclination.The gravity G of vehicle and ground inclination α all can be obtained by sensor measurement.
Automobile, when giving it the gun, needs inertial force when overcoming its quality accelerated motion.The quality of automobile is divided into translatory mass and gyrating mass two parts.During acceleration, not only to overcome the inertial force that automobile translation quality produces in accelerator, also will overcome the inertial force that gyrating mass produces simultaneously.For the ease of calculating, generally the inertial force of gyrating mass is converted into the inertial force of translatory mass.Therefore complete vehicle quality m can pass through following formulae discovery:
wherein δ is correction coefficient of rotating mass.This correction coefficient of rotating mass δ has fixed value for each car, can be pre-entered in controller 2.
By technique scheme, first the present invention detects the acceleration a of vehicle, then according to the driving force F of the vehicle calculated
t, vehicle resistance to rolling F
f, vehicle air resistance F
w, vehicle grade resistance F
idraw the acceleration resistance F of vehicle
j, thus according to the acceleration a of vehicle and the acceleration resistance F of vehicle
jcalculate the quality m of car load, and calculate the load of vehicle by the quality m of car load.
By the detection method of carload provided by the invention and the pick-up unit of carload; driver can be helped to detect the quality of car load; prevent the problem overloaded; effectively protect vehicle; improve the serviceable life of vehicle and parts, reduce maintenance cost, the structure of the detecting device of carload of the present invention is simple simultaneously; keep in repair easily manufactured, the truck of any structure can be applied to.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out combination in any between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. a detection method for carload, is characterized in that, this detection method comprises the following steps:
S1) the acceleration a of vehicle is detected;
S2) the acceleration resistance F of vehicle is calculated
j;
S3) according to the acceleration a of described vehicle and the acceleration resistance F of described vehicle
jcalculate complete vehicle quality m; And
S4) described carload is calculated according to described complete vehicle quality m.
2. detection method according to claim 1, is characterized in that, the acceleration resistance F of described vehicle
jby following formulae discovery:
F
j＝F
t-F
f-F
w-F
i，
Wherein F
tfor the driving force of vehicle, F
ffor the resistance to rolling of vehicle, F
wfor the air resistance of vehicle, F
ifor the grade resistance of vehicle.
3. detection method according to claim 2, is characterized in that, the driving force F of described vehicle
tby following formulae discovery:
Wherein T
tqfor motor torque, i
gfor transmission ratio, i
0for final driver ratio, η
tfor the mechanical efficiency of power train, r is the radius of wheel of vehicle;
The resistance to rolling F of described vehicle
fby following formulae discovery:
F
f＝Wf，
Wherein W gravity suffered by the tire of vehicle, f is coefficient of rolling resistance;
The air resistance F of described vehicle
wby following formulae discovery:
Wherein C
dfor coefficient of air resistance, A is front face area, and ρ is atmospheric density, u
rfor the relative velocity of vehicle and wind; And
The grade resistance F of described vehicle
iby following formulae discovery:
F
i＝Gsinα，
Wherein G is the gravity of vehicle, and α is ground inclination.
4. detection method according to claim 3, is characterized in that, described coefficient of rolling resistance f is by following formulae discovery:
f＝0.0076+0.000056u
a，
Wherein u
afor the speed of a motor vehicle of vehicle.
5. detection method according to claim 1, is characterized in that, described complete vehicle quality m is by following formulae discovery:
wherein δ is correction coefficient of rotating mass.
6. a pick-up unit for carload, is characterized in that, this pick-up unit comprises:
Acceleration transducer (1), for detecting the acceleration a of vehicle; And
Controller (2), is connected with described acceleration transducer (1), for calculating the acceleration resistance F of vehicle
j, according to the acceleration a of described vehicle and the acceleration resistance F of described vehicle
jcalculate complete vehicle quality m and calculate described carload according to described complete vehicle quality m.
7. pick-up unit according to claim 6, is characterized in that, the acceleration resistance F of described vehicle
jby following formulae discovery:
F
j＝F
t-F
f-F
w-F
i，
Wherein F
tfor the driving force of vehicle, F
ffor the resistance to rolling of vehicle, F
wfor the air resistance of vehicle, F
ifor the grade resistance of vehicle.
8. pick-up unit according to claim 7, is characterized in that, the driving force F of described vehicle
tby following formulae discovery:
Wherein T
tqfor motor torque, i
gfor transmission ratio, i
0for final driver ratio, η
tfor the mechanical efficiency of power train, r is the radius of wheel of vehicle;
The resistance to rolling F of described vehicle
fby following formulae discovery:
F
f＝Wf，
Wherein W gravity suffered by the tire of vehicle, f is coefficient of rolling resistance;
The air resistance F of described vehicle
wby following formulae discovery:
Wherein C
dfor coefficient of air resistance, A is front face area, and ρ is atmospheric density, u
rfor the relative velocity of vehicle and wind; And
The grade resistance F of described vehicle
iby following formulae discovery:
F
i＝Gsinα，
Wherein G is the gravity of vehicle, and α is ground inclination.
9. pick-up unit according to claim 8, is characterized in that, described coefficient of rolling resistance f is by following formulae discovery:
f＝0.0076+0.000056u
a，
Wherein u
afor the speed of a motor vehicle of vehicle.
10. pick-up unit according to claim 6, is characterized in that, described complete vehicle quality m is by following formulae discovery:
wherein δ is correction coefficient of rotating mass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410186243.9A CN104848923A (en) | 2014-05-05 | 2014-05-05 | Vehicle load detection method and detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410186243.9A CN104848923A (en) | 2014-05-05 | 2014-05-05 | Vehicle load detection method and detection device |
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|---|---|
| CN104848923A true CN104848923A (en) | 2015-08-19 |
Family
ID=53848741
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|---|---|---|---|
| CN201410186243.9A Pending CN104848923A (en) | 2014-05-05 | 2014-05-05 | Vehicle load detection method and detection device |
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| CN106529111A (en) * | 2015-09-14 | 2017-03-22 | 北汽福田汽车股份有限公司 | Method and system for detecting total vehicle weight and vehicle |
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| CN109466562A (en) * | 2018-10-15 | 2019-03-15 | 浙江吉利新能源商用车有限公司 | Vehicle weight obtains automatically, the system and method for vehicle overloading automatic alarm |
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| CN106529111A (en) * | 2015-09-14 | 2017-03-22 | 北汽福田汽车股份有限公司 | Method and system for detecting total vehicle weight and vehicle |
| CN107643117A (en) * | 2016-07-22 | 2018-01-30 | Zf 腓德烈斯哈芬股份公司 | Load profile |
| CN107643117B (en) * | 2016-07-22 | 2021-05-18 | Zf 腓德烈斯哈芬股份公司 | Loading profile |
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| CN111512126B (en) * | 2017-12-26 | 2022-02-25 | 五十铃自动车株式会社 | Vehicle weight estimation device and vehicle weight estimation method |
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