CN104534998B - A kind of automobile basic parameter measurement apparatus and its measuring method - Google Patents
A kind of automobile basic parameter measurement apparatus and its measuring method Download PDFInfo
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- CN104534998B CN104534998B CN201510028297.7A CN201510028297A CN104534998B CN 104534998 B CN104534998 B CN 104534998B CN 201510028297 A CN201510028297 A CN 201510028297A CN 104534998 B CN104534998 B CN 104534998B
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Abstract
The invention provides a kind of automobile basic parameter measurement apparatus and its measuring method, using laser range sensor as direct measurement instrument, laser range sensor is installed on the support with elevating mechanism and rotating mechanism, support is driven by linear drive apparatus and can be moved along base length direction, so as to the position that laser range sensor moves to needs be measured.It is used to position the center for finding wheel present invention additionally comprises wheel center positioner, wheelspan measurement servicing unit is used for subsidiary or so tyre tread, and angular surveying servicing unit is used for the approach angle and departure angle of subsidiary vehicle.The present invention can solve the problem that traditional manual measurement method measurement error is larger at present, the problems such as inconvenient operation, can realize to automobile length, wheel base and, the accurate measurement of wheelbase and approach angle departure angle.
Description
Technical field
The present invention relates to automobile basic parameter fields of measurement, there is provided one kind measurement automobile length, wheel base, axle
Away from and the basic parameter such as approach angle departure angle device extremely measuring method.
Background technology
The length of automobile, wheel base, wheelbase and approach angle, departure angle are the basic parameters of Automobile Design, together
When be also basic data required for other control system.And these data be exploitation automobile other systems or design vehicle when must
Indispensable data.Especially in some applications of military domain, such as just must account for sky during remote transport vehicle
Between make full use of, the parameter such as length and width are high of vehicle at this moment must be just accurately known that to arrange loading pattern to be transported；More
Wild car by property, must just measure approach angle, departure angle.At present, the testing agency of China's automobile is for vehicle overall dimension
Measurement, still continuing to use steel tape, tape measure and mark post carries out hand dipping, and not only labour intensity is big for this kind of method, and efficiency is low, surveys
Amount resultant error is larger, and it is also very inconvenient to operate, such as measure automobile highly, peak often in automobile top,
And top to level ground distance with regard to bad measurement.But can both facilitate accurate measurement automobile length, wheel base,
Wheelbase and approach angle, the integral test system of departure angle do not occur also.Therefore, developing one being capable of accurate measurement automobile
Length, wheel base, wheelbase, and the composite measurement platform of approach angle departure angle are necessary.
The content of the invention
The present invention devises a kind of automobile basic parameter measurement apparatus for above-mentioned technical problem, solves traditional at present
Manual measurement method measurement error is larger, the not enough problem such as inconvenient operation, realizes the accurate measurement to automobile parameter.
A kind of automobile basic parameter measurement apparatus, including：
Base, it is placed horizontally on ground, used as carrying platform；
Linear drive apparatus, its both sides for being arranged at the base is arranged along the base length direction；
Support, including vertical rack and horizontal stand, the vertical rack are connected on the linear drive apparatus, in institute
Base length direction linear motion described in the driving lower edge of linear drive apparatus is stated, the horizontal stand connects with the vertical rack
Connect, in horizontally disposed, rotating mechanism and elevating mechanism are provided with support；
Laser range sensor, it is arranged on the horizontal stand, measurement target to the laser range sensor
Distance；
Wheel center positioner, its outside for being arranged at wheel can position the center of wheel outermost plane, make to swash
Upright plane where ligh-ranging sensor finds the center of wheel is measured；
Wheelspan measurement servicing unit, it is arranged at two wheels of left and right, and the wheelspan measurement servicing unit is auxiliary with two
Measuring surface is helped, between measuring the distance in described two subsidiary faces so as to obtain left and right wheelses by using laser range sensor
Distance；
Angular surveying servicing unit, it is arranged at wheel, and upper flat plate props up wheel and most prominent with automotive suspension bottom
Position be in contact, lower flatbed horizontal is placed, and uses laser range sensor to measure on upper flat plate between two fixed measuring points
Distance, obtains the angle of the wheel tangent line and lower flat board upper surface by the contact point, so that it may obtain automobile approach angle and from
Beveling.
Preferably, levelling gear and level meter are provided with the base, adjustment and institute by the levelling gear
Stating the verification of level meter makes the base upper surface holding level.
Preferably, the base both sides are provided with two straight-line grooves, and the linear drive apparatus are installed on described straight
In line groove, dust cover is provided with the groove, prevents dust from falling into the linear drive apparatus.
Preferably, position measurement sensor is provided with the linear drive apparatus, the straight line can be measured and driven
The position of dynamic device motion.
Preferably, the rotating mechanism is arranged on vertical rack, including bottom bearings and is installed on the bearing
Bearing in seat, the vertical rack is installed in bearing block, and can rotate and then adjust the position of horizontal stand makes it along institute
Base length direction is stated to extend or extend in the width direction.
Preferably, the elevating mechanism includes vertical bar, quill, pulley and steel wire, the quill with it is perpendicular
Straight-bar is slidably connected, and on the pulley, another point is fixedly connected quill to the steel wire one ends wound, rotates pulley and passes through
The lifting of quill is realized in the drive of steel wire, so as to adjust the height of the laser range sensor being arranged on.
Preferably, the wheel center positioner includes chuck and location-plate, and the chuck blocks car
The excircle of wheel, by measure distance measuring sensor to the side two location-plates between range difference, it becomes possible to obtain vehicle
The distance between center in former and later two lateral wheel faces of side.
Preferably, the wheelspan measurement servicing unit includes first baffle, second baffle and crossbeam, the first baffle
It is fixedly connected with crossbeam, the second baffle is slidably connected with crossbeam, the first baffle is arranged in parallel with the second baffle,
The first baffle is fitted with left wheel outside, and second baffle is fitted with right side wheels inner side.
Preferably, the angular surveying servicing unit includes upper flat plate, lower flat board and support bar, and the upper flat plate is with
Flat board one end is connected through the hinge, and makes to form certain angle between the upper flat plate and lower flat board, and the support bar can be fixed
Flat board and lower flat board are allowed to keep fixed angle.
Present invention also offers a kind of automobile basic parameter measuring method using above-mentioned automobile basic parameter measurement apparatus,
Comprise the following steps：
Step one, laser range sensor are moved under linear drive apparatus driving, and measure the point on car to described sharp
The distance of ligh-ranging sensor, is calculated the angle of automobile longitudinal center line and the laser range sensor moving direction,
Angle i.e. between automobile longitudinal center line and base centerline；
Step 2, the laser range sensor of both sides is placed in same horizontal line, measurement automobile is along the base length
Direction and the length and width of width, and along the wheel base in the base length direction, according to automobile longitudinal center
Angle between line and the base centerline, conversion obtains length, width and the wheel base of automobile, and a laser ranging is passed
As for roof end, direct measurement obtains the height of automobile to sensor；
Step 3, two subsidiary faces using the laser range sensor measurement wheelspan measurement servicing unit
Distance, the distance can just be converted into the wheelspan of automobile；
Step 4, the rear that the angular surveying servicing unit is respectively placed in front vehicle wheel front and rear wheel, it is upper flat
Plate props up front and back wheel and the position most prominent with automotive suspension bottom is in contact, and it is measured to upper using laser range sensor
Distance on flat board between two fixed measuring points, obtains the angle of the wheel tangent line and lower flat board upper surface by the contact point, should
Angle is the approach angle and departure angle of automobile.
Beneficial effect of the present invention：Have high precision, speed fast as measurement apparatus using laser range sensor
The characteristics of, only need to be stopped at automobile on base by user, the present apparatus can be automatically performed automobile length, wheelspan, approach angle,
The measurement of departure angle, saves manpower, and it is larger to solve manual measurement method measurement error traditional at present, inconvenient operation
The problems such as.
Brief description of the drawings
Fig. 1 is automobile basic parameter measurement apparatus structural representation of the present invention.
Fig. 2 is linear drive apparatus structural representation of the present invention.
Fig. 3 is linear drive apparatus movable part schematic diagram of the present invention.
Fig. 4 is holder pivots structural scheme of mechanism of the present invention.
Fig. 5 is support lifting mechanism front view of the present invention.
Fig. 6 is support lifting mechanism left view of the present invention.
Fig. 7 is laser range sensor position of the present invention front view.
Fig. 8 is laser range sensor position of the present invention top view.
Fig. 9 is wheel center positioner front view of the present invention.
Figure 10 is wheel center positioner left view of the present invention.
Figure 11 is wheelspan measurement servicing unit front view of the present invention.
Figure 12 is wheelspan measurement servicing unit top view of the present invention.
Figure 13 is wheelspan measurement servicing unit scheme of installation of the present invention.
Figure 14 is angular surveying assistant apparatus structure schematic diagram of the present invention.
Figure 15 is wheelbase of the present invention and centerlines measuring principle figure.
Figure 16 is length of the present invention and width measure schematic diagram.
Figure 17 is height measurement principle figure of the present invention.
Figure 18 is approach angle of the present invention, departure angle measuring principle figure.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to specification text
Word can be implemented according to this.
As shown in figure 1, being driven the invention provides a kind of automobile basic parameter measurement apparatus, including base 1, support 2, straight line
Dynamic device 3, is provided with the sliding block 4 of linear motion on linear drive apparatus 3, and support 2 is fixed on sliding block 4, in support
On laser range sensor 5 is installed, measured automobile 6 is parked on base 1.The bottom of base 1 is provided with leveling lower margin, base 1
Upper surface four is provided with circular bubble on angle, by adjusting leveling lower margin and checking that circular bubble ensures the upper surface water of base 13
It is flat.There are two grooves arranged along its length the both sides of base 1, and linear drive apparatus 3 are located in groove, by bolt and base
1 is tightly fastened connection, and dust cover is provided with groove, prevents dust from falling into linear drive apparatus 3.
The structure of linear drive apparatus 3 is as shown in Fig. 2 two guide rails 7,8 of the left and right sides are by multiple guide rail support blocks 14
Hold, and be fixedly connected by bolt 24, two sliding shoes 15 are fitted with every guide rail, can be moved on guide rail 7,8,
Four upper planes of sliding shoe 15 are fastenedly connected by bolt with a mobile supporting plate 16, and bolt is passed through below guide rail 7,8
It is connected with backing plate at bottom 13, the backing plate at bottom 13 at guide rail two ends is connected with two supports block 9,10 by bolt 23, the branch at two ends
Bracer 9,10 is fixed on table top by the support block 9,10 at two ends by bearing, is equipped with leading screw 11 built with bearing, leading screw 11
Movable block 25, its top is fixedly connected with mobile support plate 16 by bolt 22, and leading screw 11 passes through shaft coupling 17 and servomotor
12 connections.Fig. 3 is referred in the lump, movable block 25 is connected by screw thread with leading screw 11, movable block bottom is equipped with a Laser emission dress
27 and a laser receiver 28 are put, there is the metal gate glazing bar 26 that a spacing is 1mm, metal gate between the two devices
Glazing bar 26 is connected by bolt with reeded contiguous block 29,30, contiguous block 29,30 respectively with the rest pad 9 at leading screw two ends
It is fixedly connected with 10.Because when not having barrier between laser beam emitting device 27 and reception device 26, reception device 28 is returned to
The signal of control single chip computer is high level, and the signal otherwise passed back is low level, when movable block 25 is moved along leading screw 11, its
The laser beam emitting device 27 and reception device 28 of bottom are moved also along metal gate glazing bar 26, and at this moment laser receiver 28 is passed back
Signal be the alternate pulse signal of low and high level, the number of pulse is write down by monolithic counter function, it is possible to obtain
The distance that movable block 25 is moved along leading screw 11.
Holder pivots mechanism such as Fig. 4, support is fixed on mobile support plate 16, and firm banking 31 leads to mobile support plate 16
Cross bolt to be closely connected, two bearings 33,34 are housed in firm banking 31, rotating part 32 is by bearing 33,34 and base 31
It is assembled together, square-section bar 35 is vertically welded on rotating bearing component 32, in square-section, the lower end of bar 35 is also welded
There is lifting operating mechanism, for controlling the lifting of rack beam, mainly by support bar 36, runner 37 rotates handle 38 and constitutes；Hand
Handle 39 is arranged on rotating stand 32.
As shown in Figure 5, Figure 6, quill moving up and down 41 is mounted in square-section to the schematic diagram of support lifting mechanism
On bar 35, there is rectangular recess slideway on each side of square-section bar 35, pulley 47,48,49,50,51,52,53,54 is installed
On the side of quill 41, rectangular opening is provided with the position of the sleeve 41 for installing pulley, pulley is against square by rectangular opening
On the slideway of tee section bar 35, rolled on slideway, and sliding and slideway can be adjusted by the screw on the outside of adjustable pulley
Between position, it is ensured that it is vertical that sleeve moves up and down Shi Nengbao；The top of montant 35 is equipped with pulley mounting seat 42, pulley 43,44,
45 are arranged on base 42；Fixed-hinged support 58 and 61 is mounted by means of bolts on moving sleeve 41, horizontal stand 59 1
End is connected by switching part 60 with fixed-hinged support 61, and the other end is used to install laser range sensor 64, such as Fig. 6, Fig. 7 institute
Show, the one end of drag link 56 is connected with switching part 57 with fixed-hinged support 58, the other end is by same mode and horizontal stand
59 connections.Draw ring 46 is bolted on drag link 56, and for fixing one end of thin steel rope 40, thin steel rope passes through pulley
43rd, 44,45 bottoms are fixed on roller 37, by rotating the rotation roller of handle 38, thin steel rope 40 is wrapped on roller 37, are come
Change the height of the horizontal stand 59 of moving sleeve 41 and connection fixed thereto.
As shown in Figure 9, Figure 10, four claws 69,70,72,73 of chuck are stuck in tire to wheel center positioner
On 68 outer table tops, claw 69,70,72,73 has a fixed mechanism 71, ensure that the displacement of external extension in pawl is consistent, positioning
Plate 74 can turn to core wheel institute planar, for positioning wheel center, laser range sensor be used during measurement.
Wheelspan measurement servicing unit shown in Figure 10, Figure 11 be for measurement wheel away from when take tire tangent plane position, first gear
Plate 75 is fixed with beam 76 and welds and can guarantee that vertical, the other end one sliding block 79 of installation of beam 76, and sliding block 79 is installed on beam 76
Part it is fluted, sliding block with beam 76 contact face on have corresponding projection, be so combined together when ensure that mobile
Gap, second baffle 82 is fixed by bolt with sliding block, and ensures that rest pad 77 is by alignment pin with first when plate 75 is parallel
Nail is fixed on beam 76, and rest pad 80 is bolted on one end of beam 76, is pacified by bolt on two rest pads 77 and 80
Equipped with a circular pin 81, for being oriented to and stabilization second baffle plate 82, spring 78 is housed between circular pin 81 and rest pad 77,
Effect is second baffle 82 is close together with tire medial surface.Second baffle 82 is arranged on sliding block 79 by bolt.This
Specific mounting means is as shown in figure 13, tangent with the lateral surface of wheel 84 on the inside of first baffle 75 when in use for mechanism, and second
The outside of baffle plate 82 is tangent with the medial surface of wheel 83.The distance between two baffle plates measured with laser range sensor can
To calculate the distance between two tire tread centers.
Angular surveying servicing unit connected by pin 86 as shown in figure 14, mainly by upper flat plate 85 and lower flat board 87 and
Into, the handle 91 for lifting upper flat plate 85 is provided with upper flat plate 85, support bar 92 is fixed on base plane by bolt 88
On 87, the other end is connected by lock-screw 93 with upper plane 85, when two flat boards at an angle when, by lock-screw
93 lock support bars 92, can make upper flat plate 85 and lower flat board 87 keep fixing；Upper flat plate 87 be provided with two measurement points 89,
90, the distance of two measurement points is 1m, during measurement angle, by laser range sensor measurement sensor to the vertical of the two points
Distance, then calculating the distance on vertical direction can just obtain angle.
Present invention also offers a kind of automobile basic parameter measuring method, its step is as follows：
Step one, the distance using the point on laser range sensor measurement car to the laser range sensor, calculating
Angle between automobile longitudinal center line and the base centerline, as shown in figure 15, the laser ranging on a side stand is passed
Sensor is turned on the direction along linear drive apparatus, i.e., now laser range sensor is the position A just to wheel, mobile
Support makes the luminous point of laser just to a center for wheel, reads the numerical value of sensor, and this number of degrees just can be regarded as sensing
Device is to wheel center apart from LAF, support is then moved into the position B at another wheel center, the reading of sensor is exactly
Sensor is to wheel center apart from LBG；Another side senser to two distances of wheel center is measured using same method
LCHAnd LDE；Laser range sensor is moved into O positions, sensor to the distance respectively L of two-wheeled core wheel is measuredGRAnd LFQ.Root
According to these parameters for measuring, using equation below, the angle α between automobile longitudinal center line and testboard center line is obtained：
Step 2, automobile is measured using laser range sensor along the length of the base length direction and width and
Width, and along the wheel base in the base length direction, and according to automobile longitudinal center line and the base centerline it
Between angle conversion obtain length, width and the wheel base of automobile, obtain automobile using laser range sensor direct measurement
Height.
As shown in figure 16, two supports are made to be located at respectively at two rear and front ends of linear drive apparatus, now two biographies
The distance between sensor is D, and the laser range sensor being at this moment fixed on support is respectively positioned at the anterior with after of tested vehicle
Portion, moving left and right laser range sensor makes measurement luminous point in the most prominent position in automobile front and rear part, and several groups of data are measured respectively,
After take minimum value, be not to be calculated as XfAnd Xr, it is according to the length that these parameters calculate automobile：
L0=(D-Xf-Xr)cosα
As shown in figure 17, two supports move to tested vehicle both sides, and swinging mounting crossbeam makes two for the measurement of vehicle width
Side laser range sensor is just to vehicle body, the most prominent position in range estimation vehicle body both sides, measurement both sides linear drive apparatus to vehicle body
The distance between most prominent position in both sides is respectively Y1And Y2, the distance between both sides linear drive apparatus are B, are calculated
The width of automobile is：
W=(B-Y1-Y2)cosα
Support is located at the both sides of tested vehicle, swinging mounting makes crossbeam be located at directly over automobile, is moved to the position of column
Dynamic laser range sensor, makes laser range sensor be located at vehicle outer side, adjusts horizontal depth of beam, makes the lower plane of crossbeam tight
Above patch vehicle, mobile support finds the peak of automobile, then with laser range sensor measurement distance testing stand
Distance is H1, the distance of the bottom distance measurement lower flat of laser range sensor is H2.Using equation below, vapour is calculated
The height of car is：
H=H1+H2
Step 3, two subsidiary faces using the laser range sensor measurement wheelspan measurement servicing unit
Distance so that obtain wheelspan.Between wheelspan measurement servicing unit is arranged on into two front-wheels in the manner previously described, laser ranging is used
Sensor measures first baffle and second baffle to laser displacement sensor apart from W respectively1And W2, then indulged by the automobile for measuring
The wheelspan of front-wheel is calculated to the angle α between center line and the base centerline:
B1=(W2-W1)cosα
Similarly, between wheelspan measurement servicing unit is arranged on into two trailing wheels in the manner previously described, laser range sensor is used
First baffle and second baffle are measured respectively to laser displacement sensor apart from W3And W4, rear wheel rotation is obtained using equation below
Away from：
B2=(W4-W3)cosα
Step 4, as shown in figure 18, by angular surveying servicing unit be positioned over front vehicle wheel front and rear wheel rear, and
Front and back wheel is propped up, upper flat plate is raised up to and is close to the most prominent position of wheel table top and automobile fore suspension and rear suspension bottom, and will be upper
Flat board is locked, and now, the angle theta between two planes is exactly approach angle or departure angle, is measured with laser range sensor and put down
On plate distance for S two fixing points to laser range sensor apart from P1And P2, obtain approach angle using equation below or leave away
Angle：
Although embodiment of the present invention is disclosed as above, it is not restricted to listed in specification and implementation method
With, it can be applied to various suitable the field of the invention completely, for those skilled in the art, can be easily
Other modification is realized, therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details and shown here as the legend with description.
Claims (8)
1. a kind of automobile basic parameter measurement apparatus, it is characterised in that including：
Base, it is placed horizontally on ground, used as carrying platform；
Linear drive apparatus, its both sides for being arranged at the base is arranged along the base length direction；
Support, including vertical rack and horizontal stand, the vertical rack are connected on the linear drive apparatus, described straight
Base length direction linear motion described in the driving lower edge of line drive device, the horizontal stand is connected with the vertical rack,
In horizontally disposed, rotating mechanism and elevating mechanism are provided with support；
Laser range sensor, it is arranged on the horizontal stand, the distance of measurement target to the laser range sensor；
Wheel center positioner, its outside for being arranged at wheel can position the center of wheel outermost plane, make Laser Measuring
Away from sensor find the center of wheel where upright plane measure；
Wheelspan measurement servicing unit, it is arranged at two wheels of left and right, and there are the wheelspan measurement servicing unit two auxiliary to survey
Amount face, by using laser range sensor measure the distance in described two subsidiary faces so as to obtain between left and right wheelses away from
From；
Angular surveying servicing unit, it is arranged at wheel, and upper flat plate props up wheel and the position most prominent with automotive suspension bottom
Put and be in contact to form contact point, lower flatbed horizontal is placed, and it is measured to two fixations on upper flat plate using laser range sensor
Distance between measurement point, obtains the angle of the wheel tangent line and base upper surface by the contact point, obtains the approach angle of automobile
And departure angle；
The wheel center positioner includes chuck and location-plate, and the chuck blocks the excircle of wheel, leads to
Cross measurement distance measuring sensor to phase the same side two location-plates between range difference, it becomes possible to obtain former and later two of vehicle side
The distance between the center in lateral wheel face；
The rotating mechanism is arranged on vertical rack, including bottom bearings and the bearing that is installed in the bearing block, institute
State vertical rack to be installed in bearing block, can rotate and then adjust the position of horizontal stand makes it along the base length direction
Extend or extend in the width direction.
2. automobile basic parameter measurement apparatus according to claim 1, it is characterised in that the elevating mechanism includes vertical
Bar, quill, pulley and steel wire, the quill are slidably connected with vertical bar, and the steel wire one ends wound is in the cunning
On wheel, another point is fixedly connected quill, rotates pulley and realizes the lifting of quill by the drive of steel wire, so as to adjust
The height of the laser range sensor being arranged on.
3. automobile basic parameter measurement apparatus according to claim 2, it is characterised in that the wheelspan measurement servicing unit
Including first baffle, second baffle and crossbeam, the first baffle is fixedly connected with crossbeam, and the second baffle is slided with crossbeam
Connection, the first baffle is arranged in parallel with the second baffle, and the first baffle is fitted with left wheel outside, second baffle
Fitted with right side wheels inner side.
4. automobile basic parameter measurement apparatus according to claim 3, it is characterised in that the base both sides are provided with two
Individual straight-line groove, the linear drive apparatus are installed in the straight-line groove, and dust cover is provided with the groove, prevent ash
Dirt is fallen into the linear drive apparatus.
5. automobile basic parameter measurement apparatus according to claim 1, it is characterised in that set on the linear drive apparatus
Position measurement sensor is equipped with, the position of the linear drive apparatus motion can be measured.
6. automobile basic parameter measurement apparatus according to claim 1, it is characterised in that the angular surveying servicing unit
Including upper flat plate, lower flat board and support bar, the upper flat plate and lower flat board one end are connected through the hinge, make the upper flat plate and under
Certain angle is formed between flat board, the support bar can fix upper flat plate and lower flat board is allowed to keep fixed angle.
7. automobile basic parameter measurement apparatus according to claim 6, it is characterised in that be provided with leveling on the base
Mechanism and level meter, make the base upper surface keep water by the adjustment of the levelling gear and the verification of the level meter
It is flat.
8. the automobile basic parameter measurement of the automobile basic parameter measurement apparatus any one of a kind of usage right requirement 1-7
Method, it is characterised in that comprise the following steps：
Step one, laser range sensor are moved under linear drive apparatus driving, and are measured the outermost point of car axle end cap and arrived
The distance of the laser range sensor, is calculated automobile longitudinal center line with the laser range sensor moving direction
Angle, i.e. angle between automobile longitudinal center line and base centerline；
Step 2, the laser range sensor of both sides is placed in same horizontal line, measurement automobile is along the base length direction
With the length and width of width, and along the wheel base in the base length direction, according to automobile longitudinal center line with
Angle between the base centerline, conversion obtains length, width and the wheel base of automobile, by a laser range sensor
Roof end is placed in, direct measurement obtains the height of automobile；
Step 3, two distances in subsidiary face that the wheelspan measurement servicing unit is measured using laser range sensor,
According to the angle between automobile longitudinal center line and the base centerline, conversion obtains the wheelspan of automobile；
Step 4, the rear that the angular surveying servicing unit is respectively placed in front vehicle wheel front and rear wheel, upper flat plate are supported
The firmly wheel and position most prominent with automotive suspension bottom is in contact to form contact point, lower flatbed horizontal is placed, and uses Laser Measuring
It is measured to the distance between two fixed measuring points on upper flat plate away from sensor, obtains the wheel tangent line by the contact point with
The angle of flat board upper surface, so that it may obtain the approach angle and departure angle of automobile.
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| CN201510028297.7A CN104534998B (en) | 2015-01-20 | 2015-01-20 | A kind of automobile basic parameter measurement apparatus and its measuring method |
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| CN201510028297.7A CN104534998B (en) | 2015-01-20 | 2015-01-20 | A kind of automobile basic parameter measurement apparatus and its measuring method |
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| CN104534998B true CN104534998B (en) | 2017-06-13 |
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