CN104568312A - Vehicle barycentre height detection method - Google Patents
Vehicle barycentre height detection method Download PDFInfo
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- CN104568312A CN104568312A CN201310520598.2A CN201310520598A CN104568312A CN 104568312 A CN104568312 A CN 104568312A CN 201310520598 A CN201310520598 A CN 201310520598A CN 104568312 A CN104568312 A CN 104568312A
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Abstract
The invention discloses a vehicle barycentre height detection method. The vehicle barycentre height detection method comprises the following steps: step I, determining a position of a first vertical plane located by the barycentre relative to the vehicle wheel grounding face when a vehicle is in a first angle position; step II, determining the position of a second vertical plane located by the barycentre relative to the vehicle wheel grounding face when the vehicle is in the second angle position; step III, with the position of the vehicle wheel grounding face as a benchmark, determining the position of an intersecting line between the second vertical plane and the first vertical plane, wherein the height of the intersecting line is the height of the vehicle barycentre; the angle position is the angle position when the vehicle is inclined front and back; and the vertical plane is the vertical plane vertical to the anteroposterior direction of the vehicle. The detection method is easy to implement, low in cost and high in accuracy and is safer.
Description
Technical field
The present invention relates to automobile technical field, particularly relate to a kind of vehicle's center of gravity height detection method.
Background technology
The confirmation method of center of gravity three coordinates of conventional truck is as follows.Center of gravity, at the coordinate of X-direction (working direction), can be calculated according to the difference of front and back axle load.The coordinate of center of gravity (left and right directions) in the Y direction, can calculate according to the difference of left and right wheels load.But the coordinate of Z-direction (short transverse) is difficult to detect.
The detection of usual vehicle's center of gravity height, special inclination monitor station need be used to detect, storing cycle rolls to and raises the wheel of side on roll over detection platform when being 0 to the pressure of table top (now vehicle is in the critical point of inclination), the R line at the angle that registration of vehicle rolls and now center of gravity place, asks R line and Z
0the intersection point of line, can determine the coordinate of center of gravity at Z-direction (above-below direction), is exactly the height of C.G. of vehicle.This kind of Measures compare is complicated and have some shortcomings.
Schematic diagram when Fig. 1 is right position and the front and back position of conventional drum type vehicle detection platform of the prior art detection vehicle's center of gravity.The vehicle 2 be positioned on drum-type vehicle detection platform 5 has been shown in Fig. 1.Vehicle 2 has front-wheel 1, trailing wheel 4, and its center of gravity is positioned at centre of gravity place 3, and is in Z
0on perpendicular represented by line, be understandable that, this perpendicular is perpendicular to the fore-and-aft direction of vehicle.The wheel ground plane of vehicle 2 and the supporting surface of drum-type vehicle detection platform 5.Position shown in Fig. 1, the wheel ground plane of vehicle 2 is surface level, that is, does not both tilt, and does not also tilt forward and back.
Drum-type vehicle detection platform 5 detects the heavy GL(the near front wheel of revolver and left rear wheel weight sum respectively) and right wheel load GR(off-front wheel and off hind wheel weight sum).Complete vehicle weight G=GL+GR can be calculated thus.Detect that left and right wheels is apart from Q, according to principle of moment balance, can determine the coordinate of center of gravity left and right directions.For ease of illustrating, suppose that left and right wheels is equal in weight, like this, vehicle's center of gravity is positioned at the center of vehicle on left and right directions (Width).
Drum-type vehicle detection platform 5 detects heavy (the front-wheel weight sum) G1 of front axle and heavy (trailing wheel weight sum) G2, the complete vehicle weight G=G1+G2 of back axle respectively.The wheelbase L between front-wheel and trailing wheel is obtained based on specifications parameter
0, or detection obtains wheelbase L
0.With front-wheel earth point for reference point, according to principle of moment balance, the distance D between center of gravity and front-wheel axis place vertical plane can be tried to achieve
0=G2
0* L
0/ (G1
0+ G2
0), determine the Z at centre of gravity place 3 place thus
0line (vertical curve).If with front-wheel earth point M for initial point, with ray MN for X-axis forward, using the ray upwards vertically extended from M as Z axis forward, Z
0line can be expressed as x=D
0.
Schematic diagram when Fig. 2 is conventional truck roll over detection platform of the prior art detection vehicle height of C.G..Vehicle 2, vehicle roll monitor station 6, protective device backstop 9 and basic point 7 have been shown in Fig. 2.Monitor station table top attachment coefficient is 0.7.
First vehicle 2 is placed on the brace table of vehicle roll monitor station 6.Slowly tilt vehicle to side (in example with the right side of off hind wheel 4 for basic point 7, be tilted to the right), when detecting that raising side wheel (example is revolver) weight is 0, stops tilting.Measure the angle of inclination of the brace table of now vehicle roll monitor station 6, and obtain the angle of inclination C of critical line R, wherein, the angle of inclination of brace table and the angle of inclination C sum of critical line R are 90 degree.By angle of inclination C and critical line R through these two conditions of basic point 7, the position of critical line R relative to the brace table of vehicle roll monitor station 6 can be determined.Ask critical line R and Z
0the intersection point of line is exactly the height of C.G. of vehicle.For preventing vehicle roll, vehicle roll monitor station 6 is also provided with protective device backstop 9.
In the said method of prior art, use special inclination monitor station to detect vehicle height of C.G., because roll over detection platform is specialized equipment (is exclusively used in measure and rolls), negligible amounts, therefore, testing cost is higher.And vehicle need roll to critical point in testing process, more dangerous, easily there is inclination accident in vehicle.In addition, because tyre contact patch tilts, when tire is positioned on horizontal support face, tire and wheel hub exception is stressed, easily impaired; Servo-actuated dip plane is set and then makes structure and the increase of complicated cost.
Therefore, wish that a kind of vehicle's center of gravity height detection method overcomes or at least alleviates the above-mentioned defect of prior art.
Summary of the invention
The object of the present invention is to provide a kind of vehicle's center of gravity height detection method to overcome or at least alleviate the above-mentioned defect of prior art.
For achieving the above object, the invention provides a kind of vehicle's center of gravity height detection method, described vehicle's center of gravity height detection method comprises the steps:
Step 1: the position of the first perpendicular relative to wheel ground plane determining the center of gravity place of vehicle when the first angle position;
Step 2: the position of the second perpendicular relative to wheel ground plane determining the center of gravity place of vehicle when the second angle position;
Step 3: with the position of wheel ground plane for benchmark, determines the position of the intersection between described second perpendicular and the first perpendicular, the height of described intersection and the height of described vehicle's center of gravity,
Wherein, angle position is the angle position that vehicle tilts forward and back, and perpendicular is perpendicular to the perpendicular of vehicle fore-and-aft direction.
Preferably, described vehicle's center of gravity height detection method comprises the steps: to make vehicle rear wheel and vehicle front-wheel OQ t further, and adjusts the angle position of vehicle.Preferably, determine that vehicle comprises in the step of the perpendicular at the center of gravity place of set angle position:
Determine the first weight component G1 on the one that vehicle acts in the described front-wheel of described vehicle or described both trailing wheels;
Determine the second weight component G2 on the another one that vehicle acts in the described front-wheel of described vehicle or described both trailing wheels;
The position of described perpendicular is limited: described perpendicular is relative to the angle B of the wheel ground plane of vehicle when set angle position with following two parameters; And the distance D of the ground contact point of described one in described perpendicular and described front-wheel or described both trailing wheels,
Wherein,
B=90 degree-A, angle of inclination when A is described set angle position (vehicle with respect to the horizontal plane tilt forward and back angle);
D=G2*L
0* cosA/(G1+G2), L
0it is the distance between the axis of described front-wheel and the axis of described trailing wheel.
Preferably, the first weight component G1 when set angle is 0 degree is measured with drum-type vehicle detection platform
0with the second weight component G2
0.
Preferably, the first weight component G1 when any set angle is measured with drum-type vehicle detection platform, G2=(G1
0+ G2
0)-G
1.
Preferably, the step that vehicle rear wheel is elevated relative to vehicle front-wheel is comprised: with lifting machine, the trailing wheel of described vehicle is lifted the distance that is greater than lifting lift simultaneously; And the below placing height of taking turns in the rear equals the backing plate of described lifting lift H, wherein, described lifting lift H meets following formula: H=L
0* sinA.
Preferably, the step that vehicle rear wheel is elevated relative to vehicle front-wheel comprised: with lifting machine, the wheel of the described side of described vehicle is lifted the distance equaling lifting lift simultaneously, wherein, described lifting lift H meets following formula: H=L
0* sinA.
Preferably, described lifting lift is in the scope of 100 millimeters to 900 millimeters.
Preferably, angle A is tilted forward and back during the first angle position
0it is 0 degree.
Preferably, described vehicle's center of gravity height detection method comprises aligning step further; Described aligning step comprises: the position of the 3rd perpendicular relative to wheel ground plane determining the center of gravity place of vehicle when angular position; With the position of wheel ground plane for benchmark, determine the position of the intersection between described 3rd perpendicular and described first perpendicular and/or described second perpendicular, calibrate with the height of the intersection obtained.
Preferably, to set the wheel of spacing lifting side successively, obtain multiple perpendicular, determine the height of described perpendicular relative to the intersection of the first perpendicular, calibrate with described height.
Preferably, described setting spacing is 100 millimeters.
Preferably, calibrate with sum-average arithmetic method.
Preferably, before sum-average arithmetic, reject the height value outside three times of standard deviations.
Detection method of the present invention easily realizes, and cost is low, and accuracy is high and safer.
Accompanying drawing explanation
Schematic diagram when Fig. 1 is right position and the front and back position of conventional drum type vehicle detection platform of the prior art detection vehicle's center of gravity.
Schematic diagram when Fig. 2 is conventional truck roll over detection platform of the prior art detection vehicle height of C.G. position.
Fig. 3 is the schematic diagram of vehicle's center of gravity height detection method according to an embodiment of the invention.
Fig. 4 is the schematic diagram of the position of the perpendicular that the center of gravity place of vehicle when tilting forward and back angle A is described.
Fig. 5 is with the schematic diagram of mathematical expression computing method determination vehicle's center of gravity height and position.
Reference numeral:
| 1 front-wheel | 8 | Lifting machine |
| 2 vehicles | 9 | Protective device backstop |
| 3 centre of gravity places | 10 | Backing plate |
[0043]
| 4 | Trailing wheel | ||
| 5 | Drum-type vehicle detection platform | ||
| 6 | Vehicle roll monitor station | ||
| 7 | Basic point |
Embodiment
For making object of the invention process, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is further described in more detail.In the accompanying drawings, same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Described embodiment is the present invention's part embodiment, instead of whole embodiments.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.Below in conjunction with accompanying drawing, embodiments of the invention are described in detail.
In describing the invention; it will be appreciated that; term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward " etc. instruction orientation or position relationship be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply indication device or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limiting the scope of the invention.
Vehicle's center of gravity height detection method according to the present invention one broad embodiment comprises the steps:
Step 1: the position of the first perpendicular relative to wheel ground plane determining the center of gravity place of vehicle when the first angle position;
Step 2: the position of the second perpendicular relative to wheel ground plane determining the center of gravity place of vehicle when the second angle position;
Step 3: with the position of wheel ground plane for benchmark, determines the position of the intersection between described second perpendicular and the first perpendicular, the height of described intersection and the height of described vehicle's center of gravity,
Wherein, angle position is the angle position that vehicle tilts forward and back, and perpendicular is perpendicular to the perpendicular of vehicle fore-and-aft direction.
Above-mentioned detection method without the need to by vehicle set to specific critical angle, thus easily realize, cost is low, and accuracy is high, because vehicle tilts the anti-tip ability that epoch anti-tip ability is better than on left and right directions in the longitudinal direction, therefore, safer during test.Wherein, wheel ground plane refers to the plane that the earth point of each wheel of vehicle is common.When the angle position of vehicle is zero, wheel ground plane is surface level.
Fig. 3 is the schematic diagram of vehicle's center of gravity height detection method according to an embodiment of the invention.There is shown front-wheel 1, vehicle 2, centre of gravity place 3, trailing wheel 4, drum-type vehicle detection platform 5, backing plate 10 and lifting machine 8.
Starting most with the method for the method detection vehicle height of C.G. shown in Fig. 3, first obtain the basic parameter of vehicle: the general assembly (TW) G of vehicle and the distance L0 between the front-wheel axis of vehicle and trailing wheel axis.
Distance L0 between the front-wheel axis of vehicle and trailing wheel axis can obtain from the basic specifications parameter of vehicle, also can carry out measurement at the scene and obtain.The vehicle mode of described distance easily realizes in prior art, and be not innovative point of the present invention, therefore, is not described in detail in this patent.
The general assembly (TW) G of vehicle can obtain from the existing basic specifications parameter of vehicle, also can carry out measurement at the scene and obtain.The method measured at the scene is such as measuring the heavy GL(the near front wheel of revolver and left rear wheel weight sum with drum-type vehicle detection platform 5) and right wheel load GR(off-front wheel and off hind wheel weight sum).Complete vehicle weight G=GL+GR can be calculated thus.Can also for measuring front wheel load GF(the near front wheel and off-front wheel weight sum with drum-type vehicle detection platform 5) and right wheel load GB(left rear wheel and off hind wheel weight sum).Complete vehicle weight G=GF+GB can be calculated thus.
Then determine, vehicle when tilting forward and back angle and being 0, first perpendicular at vehicle's center of gravity place relative to the distance of nosewheel contact point, namely relative to the distance D0 of front-wheel axis.See Fig. 1, with front-wheel earth point M for reference point, according to principle of moment balance, the distance D between vehicle's center of gravity O and front-wheel axis place vertical plane can be tried to achieve
0=G2*L
0/ (G1+G2), determines the Z at centre of gravity place 3 place thus
0line (vertical curve).If with front-wheel earth point M for initial point, with ray MN for X-axis forward, using the ray upwards vertically extended from M as Z axis forward, Z
0line can be expressed as x=D
0(see Fig. 5).It is pointed out that when inclination of vehicle angle is 0, the distance between vehicle's center of gravity O and front-wheel axis place vertical plane and the distance between vehicle's center of gravity O and nosewheel contact point.
Next, there is the lifting machine 8 of synchronous device with two, both sides trailing wheel 4 is lifted simultaneously, lift height and should be greater than lifting lift H(lifting is carried out to vehicle frame rear portion).Be encased inside under rear left wheel and bottom right rear wheel is highly the backing plate 10 of H.Vehicle is put down and remains on angle of inclination (the i.e. set angle A) place corresponding with lifting lift H.
Be understandable that, synchronous lifting is to improve the stability of vehicle when testing, the present invention is not limited thereto.Lifting lift H and vehicle to tilt forward and back angle A mutually corresponding.More specifically, the angle A that tilts forward and back of lifting lift H and vehicle meets following formula: H=L
0* sinA(formula 4), wherein, L
0* be wheel base, A be vehicle tilt forward and back angle (in the diagram, being the angle between straight line MN and horizontal line MS).
The position of the perpendicular at the center of gravity place of vehicle when tilting forward and back angle A is limited: described perpendicular (in the diagram with following two parameters, line correspondence OK) relative to the angle B (in the diagram, being the angle between straight line OK and straight line MN) of the wheel ground plane of vehicle when tilting forward and back angle A; And ground contact point M(or N of described perpendicular (representing with vertical curve Z line in figure 3) and front-wheel (or trailing wheel)) distance D(see Fig. 4).
B=90 degree-A (formula 1),
Wherein, A be vehicle with respect to the horizontal plane tilt forward and back angle;
D=G2*L
0* cosA/(G1+G2) (formula 2),
Wherein, L
0it is the distance between the axis of described front-wheel and the axis of described trailing wheel.
Z line and Z
0the intersection point of line can draw with graphing method, also can calculate with mathematical expression.
See Fig. 4 and Fig. 5, if with front-wheel earth point M for initial point, with the ray MN extended from front-wheel earth point M to trailing wheel earth point N for X-axis, using the ray upwards vertically extended from front-wheel earth point M as Z axis, set up two-dimensional coordinate system, in the coordinate system,
Z
0line (vertical curve in Fig. 5) can be expressed as x=D
0(formula 5),
Z line (oblique line in Fig. 5) can be expressed as z=tanB*x-D/cosB (formula 6).
Wherein, D
0for vehicle to tilt forward and back angle be zero time, Z
0distance between line place perpendicular (fore-and-aft direction perpendicular to vehicle) and front-wheel axis or nosewheel contact point.According to principle of moment balance, easily try to achieve the distance D between center of gravity and front-wheel axis place vertical plane
0=G2*L
0/ (G1+G2).Distance D corresponding to concrete angle B can calculate based on formula 2 and try to achieve.
Thus, by x=D
0substitution formula 6, can easily calculate Z line and Z
0the height of the intersection point of line.
Be the concise and to the point derivation of formula 6 below.
Can be expressed as see Fig. 5, Z line: z=tanB*x-L
mP
L
MP=L
MK*tanB
L
MK=L
MS/sinB
L
MS=D，
Therefore, z=tanB*x-L
mP
=tanB*x-L
MK*tanB
=tanB*x-L
MS/sinB*tanB
=tanB*x-D/cosB。
Wherein, L
mPfor the distance between M, P 2; L
mK* be the distance between M, K 2; L
mSfor the distance between M, S 2.
General truck can the height of lifting larger.Passenger vehicle hangs the larger impact of length by front and back, can the maximum height of lifting between 600-900, can draw and contrast the data of the height of C.G. H of many group vehicles, improve the accuracy of data by a determining deviation (such as 100).
Such as, for passenger vehicle, lifting lift can be arranged in the scope of 100 millimeters to 900 millimeters, and the difference of each lifting lift is 100 millimeters.Like this, when only rising single wheel, except angle of inclination is the angle position of 0, there are 9 angle positions (corresponding respectively to the lifting lift of 100 millimeters, 200 millimeters, 300 millimeters, 400 millimeters, 500 millimeters, 600 millimeters, 700 millimeters, 800 millimeters and 900 millimeters), thus obtain 9 centre-height data.Sum-average arithmetic and exportable final altitude information are carried out to described 9 altitude informations.In order to improve the accuracy of final altitude information further, the quantity of the altitude information obtained can be increased on the one hand; That data are further processed on the other hand.The quantitative approach increasing the altitude information obtained has: the wheel rising opposite side, like this, and can by double for the quantity of data; Reduce the difference of each lifting lift, such as, reduce at 50 millimeters from 100 millimeters, this also can corresponding increase data volume.Being further processed data, can be rejecting abnormalities data, such as, reject the height of C.G. Value Data outside three times of standard deviations.
For lifting trailing wheel 4 in the method for the embodiment above, in alternative embodiments, front-wheel 1 can also be lifted successively with a determining deviation (such as 100), detect heavy (two the trailing wheel 4 weight sums) G4 of back axle, by similar method, draw the data of many group height of C.G. H, then based on described multiple height of C.G. data, determine final height of C.G..
In order to for simplicity, in embodiment above, in two oblique angular position, one is 0 degree.But the present invention is not limited to this.In another embodiment, with any two non-vanishing tilt forward and back angle A1 and A2 time the intersection of perpendicular at center of gravity place to determine the height of vehicle's center of gravity.
With aforementioned similar method establishment coordinate system, the perpendicular at center of gravity place when tilting forward and back angle A1 and A2 can be expressed as:
Z=tanB1*x-D1/cosB1 (formula 7).
Z=tanB2*x-D2/cosB2 (formula 8).
Above-mentioned two linear functions are solved, easily can calculate the value of z, i.e. the height at vehicle's center of gravity place.
In addition, in order to simplify aligning step, described detection method only can introduce the 3rd oblique angular position to correct vehicle height value.Pass through the first oblique angular position and the second oblique angular position, and determining on the basis of vehicle's center of gravity height further, determine the position of the 3rd perpendicular relative to wheel ground plane at the center of gravity place of vehicle when angular position.Then, with the position of wheel ground plane for benchmark, determine the position of the intersection between described 3rd perpendicular and described first perpendicular and/or described second perpendicular, calibrate with the height of the intersection obtained.As previously mentioned, the mathematical algorithm of calibration can be sum-average arithmetic.
Be understandable that, although be the change by making trailing wheel rise setting height (lift height) realize angle of inclination in the foregoing embodiments, but, specific implementation also can be trailing wheel is declined, or make front-wheel rise the change realizing described OQ t and angle of inclination.In addition, moving under gravity after tilting forward and back to prevent vehicle, vehicle can be remained on braking state, and the devices such as block can be set further.
Finally it is to be noted: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit.Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (14)
1. a vehicle's center of gravity height detection method, is characterized in that, comprises the steps:
Step 1: the position of the first perpendicular relative to wheel ground plane determining the center of gravity place of vehicle when the first angle position;
Step 2: the position of the second perpendicular relative to wheel ground plane determining the center of gravity place of vehicle when the second angle position; And
Step 3: with the position of wheel ground plane for benchmark, determines the position of the intersection between described second perpendicular and the first perpendicular, the height of described intersection and the height of described vehicle's center of gravity,
Wherein, angle position is the angle position that vehicle tilts forward and back, and perpendicular is perpendicular to the perpendicular of vehicle fore-and-aft direction.
2. vehicle's center of gravity height detection method as claimed in claim 1, is characterized in that, comprise the steps: further to make vehicle rear wheel and vehicle front-wheel OQ t, and adjust the angle position of vehicle.
3. vehicle's center of gravity height detection method as claimed in claim 2, is characterized in that, determine that vehicle comprises in the step of the perpendicular at the center of gravity place of set angle position:
Determine the first weight component G1 on the one that vehicle acts in described front-wheel and described both trailing wheels;
Determine the second weight component G2 on the another one that vehicle acts in described front-wheel and described both trailing wheels;
The position of described perpendicular is limited: described perpendicular is relative to the angle B of wheel ground plane during set angle position with following two parameters; And the distance D of the ground contact point of described one in described perpendicular and described front-wheel or described both trailing wheels,
Wherein,
B=90 degree-A (formula 1)
Angle is tilted forward and back when A is described set angle position;
D=G2*L
0* cosA/(G1+G2) (formula 2)
Wherein, L
0it is the distance between the axis of described front-wheel and the axis of described trailing wheel.
4. vehicle's center of gravity height detection method as claimed in claim 3, is characterized in that, measures the first weight component G1 when set angle is 0 degree with drum-type vehicle detection platform
0with the second weight component G2
0.
5. vehicle's center of gravity height detection method as claimed in claim 4, is characterized in that, measures the first weight component G1 when any set angle with drum-type vehicle detection platform, and with following calculating G2,
G2=(G1
0+ G2
0)-G
1(formula 3).
6. vehicle's center of gravity height detection method as claimed in claim 3, is characterized in that, the step that vehicle rear wheel is elevated relative to vehicle front-wheel comprised:
With lifting machine, the trailing wheel of described vehicle is lifted the distance that is greater than lifting lift simultaneously; And
The below placing height of taking turns in the rear equals the backing plate of described lifting lift H,
Wherein, described lifting lift H meets following formula: H=L
0* sinA (formula 4).
7. vehicle's center of gravity height detection method as claimed in claim 3, is characterized in that, the step that vehicle rear wheel is elevated relative to vehicle front-wheel comprised: with lifting machine, the wheel of the described side of described vehicle is lifted the distance equaling lifting lift simultaneously,
Wherein, described lifting lift H meets following formula: H=L
0* sinA (formula 4).
8. vehicle's center of gravity height detection method as claimed in claims 6 or 7, it is characterized in that, described lifting lift is in the scope of 100 millimeters to 900 millimeters.
9. the vehicle's center of gravity height detection method according to any one of claim 1-4, is characterized in that, tilts forward and back angle A during described first angle position
0it is 0 degree.
10. vehicle's center of gravity height detection method as claimed in claim 9, is characterized in that, comprise aligning step further; Described aligning step comprises:
Determine the position of the 3rd perpendicular relative to wheel ground plane at the center of gravity place of vehicle when angular position;
With the position of wheel ground plane for benchmark, determine the position of the intersection between described 3rd perpendicular and described first perpendicular and/or described second perpendicular, calibrate with the height value of the intersection obtained.
11. vehicle's center of gravity height detection methods as claimed in claim 9, it is characterized in that, to set spacing lifting front-wheel and/or trailing wheel successively, obtain multiple perpendicular, determine the height of described perpendicular relative to the intersection of the first perpendicular, obtain multiple height value, calibrate with described height value.
12. vehicle's center of gravity height detection methods as claimed in claim 11, it is characterized in that, described setting spacing is 100 millimeters.
13. vehicle's center of gravity height detection methods as claimed in claim 12, is characterized in that, calibrate with sum-average arithmetic method.
14. vehicle's center of gravity height detection methods as claimed in claim 13, is characterized in that, before sum-average arithmetic, reject the height value outside three times of standard deviations.
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| CN111323168B (en) * | 2020-04-16 | 2021-10-01 | 一汽红塔云南汽车制造有限公司 | Method for measuring and calculating height of mass center of automobile |
| CN112326119A (en) * | 2020-10-30 | 2021-02-05 | 安徽江淮汽车集团股份有限公司 | Vehicle mass center height measuring device and method |
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