CN108955605A - The foundation of level ground of the M1 class vehicle in reverse-engineering and calibration method - Google Patents
The foundation of level ground of the M1 class vehicle in reverse-engineering and calibration method Download PDFInfo
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- CN108955605A CN108955605A CN201810470923.1A CN201810470923A CN108955605A CN 108955605 A CN108955605 A CN 108955605A CN 201810470923 A CN201810470923 A CN 201810470923A CN 108955605 A CN108955605 A CN 108955605A
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- level ground
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
- G01B21/042—Calibration or calibration artifacts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
- G01B21/24—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes for testing alignment of axes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
Abstract
The invention discloses a kind of foundation of level ground of M1 class vehicle in reverse-engineering and calibration methods, comprising the following steps: at least 3 groups of standard apparatuses are arranged on the symmetrical feature locations of vehicle body of vehicle;Establish three-dimensional references coordinate system;Standard apparatus central point under each loaded-up condition of scanning survey is at a distance from Current terrestrial;Through the standard apparatus central point under three-dimensional references coordinate system and each loaded-up condition measured at a distance from Current terrestrial, the level ground under each loaded-up condition is established;Through the standard apparatus central point under three-dimensional references coordinate system and each loaded-up condition measured at a distance from corresponding level ground, the level ground under each loaded-up condition is calibrated.The foundation of level ground of the M1 class vehicle of offer of the invention in reverse-engineering and calibration method can establish the symmetrical level ground of vehicle point cloud for obtaining scanning and three-dimensional references coordinate system, ensure that the accuracy and validity of subsequent analysis work.
Description
Technical field
The present invention relates to technical field of vehicle, in particular to level ground of a kind of M1 class vehicle in reverse-engineering is built
Vertical and calibration method.
Background technique
In the reverse-engineering of vehicle, need accurately to measure competing product vehicle.Since actual vehicle is not
It is symmetrical, therefore when analysis measures the size of corresponding short transverse, there is very big error.Guarantee that theory is got on the bus
The bilateral symmetry of body, it is ensured that in subsequent competing product measurement analytic process, the accuracy of various sizes makes itself and exploitation
The comparison of vehicle has more directive significance.In the prior art, usually consider that the ground corresponding to the vehicle under different loads is closed
System, and ground is optimized, to guarantee the bilateral symmetry characteristic of theoretically vehicle body.
Therefore, the corresponding level ground of the vehicle under various loaded-up conditions how is established, and how to be optimized various
The corresponding level ground of vehicle under loaded-up condition, becomes most important problem.
Summary of the invention
In order to solve how to establish the symmetrical three-dimensional of vehicle body that can guarantee under various loaded-up conditions in the prior art
The problem of frame of reference and level ground, the embodiment of the invention provides a kind of M1 class vehicles in reverse-engineering horizontally
The foundation in face and calibration method.The technical solution is as follows:
A kind of foundation of the level ground of M1 class vehicle in reverse-engineering and calibration method, comprising the following steps:
S1, at least 3 groups of standard apparatuses are set on the symmetrical feature locations of vehicle body of vehicle;
S2, three-dimensional references coordinate system is established;
The loaded-up condition of S3, the adjustment vehicle, scanning survey correspond to standard apparatus central point under each loaded-up condition and
The distance of Current terrestrial;
S4, by standard apparatus central point under the three-dimensional references coordinate system and each loaded-up condition measured with work as
The distance on preceding ground establishes the level ground under each loaded-up condition;
Standard apparatus central point under S5, each loaded-up condition of measurement is at a distance from corresponding level ground;
S6, by standard apparatus central point under the three-dimensional references coordinate system and each loaded-up condition measured with it is right
The distance for answering level ground calibrates the level ground under each loaded-up condition;
Level ground after being calibrated under S7, output associated vehicle body point cloud and each loaded-up condition.
Preferably, the level ground that step S4 is established under each loaded-up condition in the method specifically includes:
By taking average value of the central point of every group of standard apparatus at a distance from Current terrestrial, as every group of standard apparatus
The downward distance value of Z axis is prolonged at the midpoint of line of centres line segment, generates one group of point in Y0 plane, organizes point fitting one directly with this
This straight line is prolonged Y direction and stretched by line, the level ground under the correspondence loaded-up condition being as fitted.
Preferably, the level ground that step S6 is calibrated under each loaded-up condition in the method specifically includes:
It checks at a distance from the central point of symmetrical standard apparatus measured and corresponding level ground, if control
It apart from unequal, then rotates the level ground under respective loads state around X datum axis, adjusts to the basic phase of distance of left and right
Together.
Preferably, step S2 includes: in the method
Vehicle point cloud of the scanning record vehicle under the first loaded-up condition, is established three-dimensional on the basis of the vehicle point cloud
The frame of reference, wherein first loaded-up condition is the state of vehicle loading one driver and a copilot.
Preferably, step S2 is specifically included in the method:
The midpoint A that the front left and right wheel center line of the vehicle is arranged is origin, front left and right wheel center line
Midpoint A to rear left and right wheel center line midpoint B direction be X-axis direction, the excessively described origin of X0 plane, Y0 plane mistake
The origin and X-axis, while vertical with X0 plane, the excessively described origin of Z0 plane and vertical with X0 plane and Y0 plane.
Preferably, step S2 in the method further include:
The midpoint of the line of centres of the every group of standard apparatus scanned and the line of centres is compared with Y0 plane, point
Analyse and eliminate the error of Y direction.
Preferably, the error analyzed and eliminate Y-direction specifically includes: adjustment Y0 plane, makes every group of benchmark dress as far as possible
The line of centres set is vertical with Y0 plane, and keeps the midpoint of the line of centres of every group of standard apparatus small as far as possible at a distance from Y0.
Preferably, the loaded-up condition further include unloaded WT state, empty mass state, vehicle half cargo condition and
Vehicle full load condition.
Preferably, the standard apparatus includes RPS three-dimensional references bead and/or concentric loop patch.
Preferably, the feature locations include white body part, and preferably white body is welded part.
The foundation of level ground of the M1 class vehicle provided in an embodiment of the present invention in reverse-engineering and calibration method, pass through
It scans vehicle point cloud of the obtained vehicle under the first loaded-up condition and establishes accurate three-dimensional references coordinate system, pass through three-dimensional references
Standard apparatus central point under coordinate system and each loaded-up condition measured establishes each loaded-up condition at a distance from Current terrestrial
Under level ground, and calibrate by the three-dimensional references coordinate system level ground under each loaded-up condition.Therefore, compared to existing
Technology, the foundation of level ground of the M1 class vehicle provided in an embodiment of the present invention in reverse-engineering and calibration method, have with
It is lower the utility model has the advantages that
1, the level ground and three-dimensional references coordinate system established are more accurate;
2, the vehicle point cloud bilateral symmetry that the level ground and three-dimensional references coordinate system established can be such that scanning obtains;
3, the accuracy and validity of further analysis work be ensure that;
4, ensure that subsequent general arrangement size comparison analyzes work is completed under same standard and benchmark, general to early period
Reading the work that size defines has important directive significance.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is foundation and the calibration method of level ground of the M1 class vehicle provided in an embodiment of the present invention in reverse-engineering
Flow chart:
Fig. 2 is foundation and the calibration method of level ground of the M1 class vehicle provided in an embodiment of the present invention in reverse-engineering
In three-dimensional references coordinate system schematic diagram.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached in the embodiment of the present invention
Figure, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only this
Invention a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
To make the object, technical solutions and advantages of the present invention clearer, below to some arts being related in the present invention
Language makes description below:
M1 class vehicle: at least 4 wheels, or have 3 wheels, and manufacturer's total mass is more than 1t, remove operator's seat
Position is outer, and passenger-seat is no more than 8 passenger carrying vehicles.
Level ground: theoretically parallel to the ground, the consistent face of height, level ground refers to the reference in CAD software herein
Ground.
Current terrestrial: plane locating for vehicle when referring to scanning survey.
ML1 load: also referred to as kerb weight, whole equipments of normal vehicle operation and 90% vehicle fuel or generation
For product, coolant liquid, fire extinguisher, spare tyre and other accessories.
ML1+1 load: also referred to as empty mass increases a driver compared to ML1 load.
ML1+2 load: increase a copilot compared to ML1+1 load.
ML2 load: also referred to as Car design quality or semi-load compare ML1+2 load, 4 or 5 cars, in second row seat
Chair increases a passenger, 6 or 7 automobiles, and second row increases by two passengers, and eight-seater, third row sits 3 passengers, if third
Row only has 2 seats, then wherein a people sits to second row.
ML3 load: also referred to as vehicle is fully loaded with quality, and under the premise of total weight is allowed as defined in vehicle, each seat is equal
Passenger is taken, and increasing luggage to rear axle in luggage case allows weight or vehicle to allow total weight.Every passenger is according to 68kg
Weight simultaneously carries the calculating of 7kg luggage.
RPS point: i.e. Reference Point System, positioning datum dot system, for the positioning or ginseng in CAD design
Examine datum mark.
Three-dimensional references coordinate system: by coordinate system as defined in GB11562-2014.
As shown in Figure 1, foundation and the calibration method of level ground of the M1 class vehicle provided by the invention in reverse-engineering
Based on CAD software, comprising the following steps:
S1, at least 3 groups of standard apparatuses 1 are set on the symmetrical feature locations of vehicle body of vehicle.
According to one embodiment of present invention, feature locations include white body part, and preferably white body is welded part, but
It is the part for not including vehicle chassis part.Since the rigging error of white body part is smaller, select white body part to make
It is characterized position, it is possible to reduce the measurement error of standard apparatus 1.The selection of the feature locations of standard apparatus 1 is set on vehicle, is removed
It needs outer on the symmetrical position of vehicle body, on the direction from headstock to the tailstock, is evenly distributed as much as possible, in this way, can be with
Accuracy decline when measuring and calibrate caused by avoiding the feature locations due to selection from getting too close to.
Standard apparatus 1 includes RPS three-dimensional references bead and concentric loop patch.RPS three-dimensional references bead can be adsorbed on
Bodywork surface, concentric loop patch can be placed directly against bodywork surface.It should be noted that when scanning vehicle body, by standard apparatus 1
It is swept into vehicle data together, the basis as adjustment vehicle and horizontally relation of plane.When scanning, directly RPS three-dimensional references
The point cloud or the centre of sphere of bead, which scan out, to be come, or the center of circle of concentric loop patch is directly scanned.The setting of standard apparatus 1 is
In order to be distinguished with by the point cloud of feature locations with the point cloud of vehicle body elsewhere, it is easy to determine the symmetrical feature of vehicle body
Position.
It should be noted that the standard apparatus 1 in the application, symmetrical two standard apparatuses 1 are known as one group of benchmark
Device 1.The group number of setting is preferably 3-5 group, and it is 5 groups that standard apparatus 1, which is arranged, in one embodiment of the present of invention.Standard apparatus 1 is set
Set it is very little can not eliminate measurement error, if excessive, measurement efficiency lowers, without practical significance.
S2, three-dimensional references coordinate system is established.
According to one embodiment of present invention, three-dimensional references coordinate system is established, comprising: scanning record vehicle is in the first load
Vehicle point cloud 2 under state, establishes three-dimensional references coordinate system on the basis of vehicle point cloud 2, wherein the first loaded-up condition
For the state of one driver and a copilot of vehicle loading.
According to one embodiment of present invention, before scanning vehicle, method further includes following preparation: selection is suitable
Place gets out scanning device, loaded load etc..
Specifically, as shown in Fig. 2, the method for establishing three-dimensional references coordinate system includes: to adjust vehicle to the first load shape
State, scanning record the vehicle point cloud 2 under the first loaded-up condition, the base of the vehicle point cloud 2 under the first loaded-up condition scanned
On plinth, the midpoint A that the front left and right wheel center line of vehicle is arranged is origin, and the midpoint A of front left and right wheel center line is arrived
The direction of the midpoint B of rear left and right wheel center line is the direction of X axis, the excessively described origin of X0 plane, the excessively described original of Y0 plane
Point and X-axis, while vertical with X0 plane, the excessively described origin of Z0 plane and vertical with X0 plane and Y0 plane.
Wherein, after three-dimensional references establishment of coordinate system is good, the center for the every group of standard apparatus (1) that will be scanned can be passed through
The midpoint of line and the line of centres is compared with Y0 plane, analyzes and eliminate the error of Y direction.
Specifically, the error for analyzing and eliminating Y-direction includes: adjustment Y0 plane, is made in every group of standard apparatus 1 as far as possible
Heart line is vertical with Y0 plane, and keeps the midpoint of the line of centres of every group of standard apparatus 1 small as far as possible at a distance from Y0.
The loaded-up condition of S3, the adjustment vehicle, scanning survey correspond to 1 central point of standard apparatus under each loaded-up condition
At a distance from Current terrestrial.
According to one embodiment of present invention, loaded-up condition further includes in addition to including the first loaded-up condition (ML1+2 load)
Unloaded WT state (ML1 load), empty mass state (ML1+1 load), vehicle half cargo condition (ML2 load) and vehicle
Full load condition (ML3 load).Plane locating for vehicle when Current terrestrial refers to scanning survey.
Specifically, adjusting vehicle to different loaded-up conditions, then scanning survey is corresponded under each loaded-up condition respectively
Standard apparatus (1) central point records this distance at a distance from Current terrestrial one by one.
S4, by 1 central point of standard apparatus under the three-dimensional references coordinate system and each loaded-up condition measured with
The distance of Current terrestrial establishes the level ground under each loaded-up condition.
According to one embodiment of present invention, the level ground under each loaded-up condition is established, comprising: by taking every group of benchmark
Prolong at the midpoint of average value of the central point of device 1 at a distance from Current terrestrial, the line of centres line segment as every group of standard apparatus 1
The downward distance value of Z axis generates one group of point in Y0 plane, organizes point fitting straight line with this, this straight line is prolonged Y direction
It stretches, the plane of formation is the level ground under the respective loads state being fitted, under each loaded-up condition that fitting is obtained
Level ground records one by one.
1 central point of standard apparatus under S5, each loaded-up condition of measurement is at a distance from corresponding level ground.
Specifically, measuring 1 central point of standard apparatus and corresponding water in the vehicle point cloud under each loaded-up condition in CAD software
The distance of plane earth, and record one by one.
S6, by 1 central point of standard apparatus under the three-dimensional references coordinate system and each loaded-up condition measured with
The distance of corresponding level ground, calibrates the level ground under each loaded-up condition.
According to one embodiment of present invention, the level ground calibrated under each loaded-up condition specifically includes: inspection measures
Each loaded-up condition under symmetrical one group of standard apparatus 1 central point at a distance from corresponding level ground, if left and right
It apart from unequal, then rotates the level ground under respective loads state around X datum axis, adjusts to the basic phase of distance of left and right
Together.Level ground under each loaded-up condition after calibration is recorded one by one.
Level ground after being calibrated under S7, output associated vehicle body point cloud and each loaded-up condition.
According to one embodiment of present invention, it exports after being calibrated under associated vehicle body point cloud and each loaded-up condition horizontally
Face is ready to carry out the measurement of next step general arrangement size and General Arrangement with production.
When specific measurement, vehicle body point cloud is calibrated to three-dimensional by the standard apparatus 1 under corresponding first loaded-up condition
In the frame of reference, thus guarantee that analyzing work to the size comparison of vehicle is completed under same standard and benchmark, Jin Erbao
The accuracy and validity of further analysis work are demonstrate,proved.
In conclusion the foundation and calibration of level ground of the M1 class vehicle provided in an embodiment of the present invention in reverse-engineering
Method is established accurate three-dimensional references coordinate system by scanning vehicle point cloud of the obtained vehicle under the first loaded-up condition, is made
The three-dimensional references coordinate system that must be established is more accurate.And method provided in an embodiment of the present invention is sat by above-mentioned three-dimensional references
Standard apparatus central point under mark system and each loaded-up condition measured is established at a distance from Current terrestrial and calibrates each load
Level ground under state.Therefore, compared with the prior art, M1 class vehicle provided in an embodiment of the present invention is in reverse-engineering
The vehicle point that the foundation of level ground and calibration method, the level ground of foundation and three-dimensional references coordinate system can be such that scanning obtains
Cloud bilateral symmetry reduces error when analysis measures the size of corresponding short transverse, ensure that the standard of further analysis work
True property and validity, and ensure that subsequent general arrangement size comparison analyzes work is completed under same standard and benchmark, it is right
The work that early period, concept size defined has important directive significance.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
All the above alternatives can form alternative embodiment of the invention using any combination, herein no longer
It repeats one by one.
In the description of invention, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower", " preceding ",
The orientation or positional relationship of the instructions such as " rear ", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" be based on
Orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion institute
The device or element of finger must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this hair
Bright limitation.In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relatively important
Property or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Person implicitly includes one or more of the features.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is
Two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected;It can
To be mechanical connection, it is also possible to be electrically connected;It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Claims (10)
1. foundation and the calibration method of a kind of level ground of M1 class vehicle in reverse-engineering, which is characterized in that including following
Step:
S1, at least 3 groups of standard apparatuses (1) are set on the symmetrical feature locations of vehicle body of vehicle;
S2, three-dimensional references coordinate system is established;
The loaded-up condition of S3, the adjustment vehicle, scanning survey correspond to standard apparatus (1) central point under each loaded-up condition and work as
The distance on preceding ground;
S4, by standard apparatus (1) central point under the three-dimensional references coordinate system and each loaded-up condition measured with work as
The distance on preceding ground establishes the level ground under each loaded-up condition;
Standard apparatus (1) central point under S5, each loaded-up condition of measurement is at a distance from corresponding level ground;
S6, by standard apparatus (1) central point under the three-dimensional references coordinate system and each loaded-up condition measured with it is right
The distance for answering level ground calibrates the level ground under each loaded-up condition;
Level ground after being calibrated under S7, output associated vehicle body point cloud and each loaded-up condition.
2. foundation and the calibration method of level ground of the M1 class vehicle according to claim 1 in reverse-engineering, special
Sign is that the level ground that step S4 is established under each loaded-up condition in the method specifically includes:
By taking average value of the central point of every group of standard apparatus (1) at a distance from Current terrestrial, as every group of standard apparatus (1)
The midpoint of line of centres line segment prolong the downward distance value of Z axis, generate one group of point in Y0 plane, it is straight to organize point fitting one with this
This straight line is prolonged Y direction and stretched by line, the level ground under the correspondence loaded-up condition being as fitted.
3. foundation and the calibration method of level ground of the M1 class vehicle according to claim 1 in reverse-engineering, special
Sign is that the level ground that step S6 is calibrated under each loaded-up condition in the method specifically includes:
It checks at a distance from the central point of symmetrical standard apparatus (1) measured and corresponding level ground, if control
It apart from unequal, then rotates the level ground under respective loads state around X datum axis, adjusts to the basic phase of distance of left and right
Together.
4. foundation and the calibration method of level ground of the M1 class vehicle according to claim 1 in reverse-engineering, special
Sign is that step S2 includes: in the method
Vehicle point cloud (2) of the scanning record vehicle under the first loaded-up condition, establishes three on the basis of the vehicle point cloud (2)
Wiki conventional coordinates, wherein first loaded-up condition is the state of vehicle loading one driver and a copilot.
5. foundation and the calibration method of level ground of the M1 class vehicle according to claim 4 in reverse-engineering, special
Sign is that step S2 is specifically included in the method:
The midpoint A that the front left and right wheel center line of the vehicle is arranged is origin, the midpoint A of front left and right wheel center line
Direction to the midpoint B of rear left and right wheel center line is the direction of X-axis, the excessively described origin of X0 plane, the excessively described original of Y0 plane
Point and X-axis, while vertical with X0 plane, the excessively described origin of Z0 plane and vertical with X0 plane and Y0 plane.
6. foundation and the calibration method of level ground of the M1 class vehicle according to claim 4 in reverse-engineering, special
Sign is, step S2 in the method further include:
The line of centres of every group of standard apparatus (1) scanned and the midpoint of the line of centres are compared with Y0 plane, point
Analyse and eliminate the error of Y direction.
7. foundation and the calibration method of level ground of the M1 class vehicle according to claim 6 in reverse-engineering, special
Sign is that the error analyzed and eliminate Y-direction specifically includes: adjustment Y0 plane makes as far as possible in every group of standard apparatus (1)
Heart line is vertical with Y0 plane, and keeps the midpoint of the line of centres of every group of standard apparatus (1) small as far as possible at a distance from Y0.
8. foundation and the calibration method of level ground of the M1 class vehicle according to claim 1 in reverse-engineering, special
Sign is that the loaded-up condition further includes that unloaded WT state, empty mass state, vehicle half cargo condition and vehicle are fully loaded
State.
9. foundation and the calibration method of level ground of the M1 class vehicle according to claim 1 in reverse-engineering, special
Sign is that the standard apparatus (1) includes RPS three-dimensional references bead and/or concentric loop patch.
10. foundation and the calibration method of level ground of the M1 class vehicle according to claim 1 in reverse-engineering, special
Sign is that the feature locations include white body part, and preferably white body is welded part.
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