CN102749209A - Channel type automobile wheel positioner and detection method thereof - Google Patents
Channel type automobile wheel positioner and detection method thereof Download PDFInfo
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Abstract
The invention relates to a channel type automobile wheel positioner and a detection method thereof. The channel type automobile wheel positioner comprises a computer system, four positioning targets, wheel clamps assembled on the positioning targets in a one-to-one correspondence manner and two opposite vertical columns, wherein a first camera and a second camera are sequentially mounted on each vertical column from top to bottom; the first camera and the second camera on one of the vertical columns are respectively axisymmetric with the first camera and the second camera on the other vertical column; and the distance between the two vertical columns is matched with the transverse width of a detected automobile. According to the channel type automobile wheel positioner, multiple groups of cameras with different focal lengths are used for shooting and valuing images, so that the problem that the requirement for the measurement of an automobile having a large-span wheelbase can not be met in the prior art is solved; and by adopting a channel type measurement mode, multi-axle automobiles can be detected section by section, thereby greatly improving the measurement precision.
Description
Technical field
The present invention relates to the vehicle detection technical field, be specifically related to a kind of channel-type wheel alignment meter and detection method thereof.
Background technology
At present; Along with the expansion gradually of the commercial car location market space, the domestic enterprise that sets foot in the producing and selling of commercial car orientator also increases gradually, though product is many; But there is not unified standard; No matter, still all exist different gaps on service, the price, compare analysis at present from following existing measuring technology in technology, precision:
1) backguy is measured: the chi measurement is measured, drawn in backguy is the metering system that the most original commercial car is located, and because of the precision that can't guarantee to measure and adjust, on passenger car is measured, thoroughly eliminated, but the sub-fraction maintenance depot of commercial car is still using.
2) PSD measures: PSD is a kind of photoelectrical position sensor of simulation; The PSD measuring technique is used more extensive at the initial stage that orientator gets into the home market; But because PSD element temperature influence is big and its linearity is also relatively poor; On passenger car equipment, also be eliminated basically, and early stage use commonplace on the commercial car positioning equipment is eliminated at present basically.
3) IR survey: its theoretical precision of infrared rays survey can reach 0.01 degree even higher; But any object or luminophor all can distribute infrared light in the real life; How to remove interfering with each other between extraneous infrared light and the measuring light; Become a global difficult problem, also do not have good solution on the home market at present, therefore cause measuring accuracy to reduce.Be not used basically at present yet.
4) laser measurement: laser has many good qualities, and such as high directivity, monochromaticity, high brightness, so general laser measurement source is difficult to disturbed, stability is also fine.But be used for the laser sensor of four-wheel position finder, belong to semiconductor laser, the life-span, theoretical measuring accuracy was lower than 0.1 degree only at 5000 hours, and actual measuring accuracy generally is difficult to reach 0.1 degree.And laser has very strong injury to human eye, from protection laborer's purpose, and the rules that country has restriction to use to the product of this type.So this series products is at the row of eliminating gradually.
5) CCD measures: the CCD device then is nearly ten years light receiving sensor spares that just occur; What export is digital signal; It has, and the linearity is good, temperature stability is good, can distinguish various stray lights through special filtering algorithm, is the optical sensor spare that present foreign brand name extensively adopts.Measurement range generally can reach more than positive and negative 20 degree, and all between 0.015 to 0.025 degree, precision is then many about 0.01 degree for optical resolution in theory.Promoted more at present and even in the future and adopted.
Nearly 2 years; Along with the production of passenger car (dolly) 3D shooting four-wheel position finder with popularize; Derive a kind of commercial car 3D orientator of transition nature; In fact it is exactly the passenger car 3D positioning system of having amplified, and the size of the camera crossbeam that extended is in order to measuring the commercial car of broad, but this 3D positioning system based on the passenger car exploitation has significant limitation.
As shown in Figure 1; Structural representation for the transition type 3D four-wheel position finder of prior art; It comprises computer system, No. 1 location target, No. 2 location targets, No. 3 location targets, No. 4 location targets, column L, column R, camera A, camera B and crossbeams; Column L and column R are used for supporting traverse, and the two ends of crossbeam are installed camera A and camera B respectively, and secondary light source is installed around camera A, the camera B.Computer system generally comprises display and cabinet (in the data processing main frame is arranged), and when state to be measured, No. 1 location target, No. 2 location targets, No. 3 location targets, No. 4 location targets hang over outside the cabinet through corresponding wheel folder respectively.When needing to measure; Go passenger car to column L and column R, No. 1 location target, No. 2 location targets, No. 3 location targets, No. 4 location targets are installed respectively on the wheel rim of front-wheel and trailing wheel, No. 1 location target, No. 2 location targets, No. 3 location targets, No. 4 figures of location on the target all present centrosymmetric geometric figure; During measurement; The direction of operating dish continues adjustment front-wheel and trailing wheel and since target and wheel rim with take turns press from both sides carry out rigidly connected, therefore; The rotation of horizontal direction or vertical direction all appears in No. 1 location target, No. 2 location targets, No. 3 location targets, No. 4 location targets; Camera A, camera B take No. 1 location target, No. 2 location targets, No. 3 location targets, No. 4 location targets continuously, and give computer system image data transmission, and computer system is carried out the space geometry computing according to these view data (data that the target angle changes); Calculate wheel alignment parameter; Described positional parameter comprises toe-in, the camber angle of wheel rim, the kingpin inclination of steering mechanism, kingpin castor angle, wheelspan, wheelbase, push angle, the angle etc. of shrinking back.
From the above; Transition type 3D four-wheel position finder can only satisfy the measurement demand of short vehicle wheelbase (the passenger car wheelbase is generally in 4 meters), and the wheelbase of commercial car is bigger, and the passenger vehicle wheel base generally all surpasses 10 meters; And some high capacity waggon wheelspans even above 20 meters; The size-dependence of camera subject camera lens " depth of field ", one group of camera lens can't satisfy the measurement for the vehicle of the wheelbase of large span like this, and therefore this transition type 3D orientator can only satisfy the parameter measurement of front-wheel basically; And can't trailing wheel be measured; Cause vehicle rear wheel to measure and to adjust, and the toe-in that can't use trailing wheel parameter (trailing wheel go push angle) to carry out front-wheel regulates, cause that the bearing circle of vehicle can't be revised etc.; Its measurement function even be weaker than traditional electronic type orientator, just measuring accuracy and accuracy are higher than traditional electronic type orientator.
Summary of the invention
The objective of the invention is to propose a kind of channel-type wheel alignment meter and detection method thereof, the problem that its transition type 3D four-wheel position finder that can solve prior art can't be measured the trailing wheel parameter of high capacity waggon or semitrailer.
In order to achieve the above object, the technical scheme that the present invention adopted is following:
Channel-type wheel alignment meter, it comprises a computer system, four location targets, and with the wheel fixed mechanism of location target corresponding one by one assembling; It also comprises two columns that are oppositely arranged; Each column is equipped with first video camera, second video camera from top to bottom successively, and first video camera on one of them column, second video camera respectively with another column on first video camera, second video camera become rotational symmetry to distribute; Distance between two columns is complementary with the transverse width of a tested vehicle; First video camera, second video camera all are connected with computer system; First video camera and/or second video camera are respectively applied for continuous shooting and are installed on the location target on the automobile rim and the image that photographs is transferred to computer system, and computer system draws the positional parameter of automotive wheel through computing; Wherein, the camera lens of first video camera, second video camera is tight shot, and the focal length of the camera lens of first video camera, second video camera is all different.
Preferably, but in order to increase the type of testing vehicle, the below of second video camera also is equipped with the 3rd video camera, and the 3rd video camera also is installed on the column; The 3rd video camera also is connected with computer system, also is used for taking continuously the location target that is installed on the automobile rim and the image that photographs is transferred to computer system; The camera lens of the 3rd video camera also is a tight shot, and the focal length of the camera lens of the focal length of the camera lens of the 3rd video camera and first video camera, second video camera is different.
Preferably, the focal length of the camera lens of first video camera is 16mm; The focal length of the camera lens of second video camera is 24mm; The focal length of the camera lens of the 3rd video camera is 30mm.Measure propons and use the first shooting camera of lens focus when (comprising the double steering bridge) as 16mm; Use second video camera of lens focus when measuring the back axle of medium truck or passenger vehicle, use three video camera of lens focus when measuring the back axle of large-scale (overlength) lorry as 30mm as 24mm.The tight shot of above-mentioned 16mm, 24mm, 30mm only is wherein a kind of possible focal length combination, can use the tight shot of multiple different focal in theory.
Preferably, in order to practice thrift cost, said first video camera, second video camera, the 3rd video camera are industrial camera.
Preferably, for energy-conserving and environment-protective, secondary light source is installed all around first video camera, second video camera, said secondary light source is LED infrared lamp or LED visible light source etc. (or being other led light sources).
The present invention also proposes a kind of detection method based on above-mentioned channel-type wheel alignment meter, and it may further comprise the steps:
A, with before running car to two column, and the front-wheel of automobile is positioned at 2-5 rice, column the place ahead;
In B, the steps A; When if said automobile is double steering bridge lorry; Installing and locating target respectively on bridge of double steering bridge lorry and the corresponding wheel rim of two bridges then uses first video camera and computer system to measure the corresponding positional parameter of a bridge and the two bridge wheels of double steering bridge lorry (comprising the Kingpin inclination, reverse caster of steering mechanism etc.) then;
In C, the steps A; When if said automobile is jubilee wagon or big bus car; Installing and locating target respectively on the front-wheel of automobile and the corresponding wheel rim of trailing wheel then; Use first video camera and computer system to measure the positional parameter of front-wheel then, use second video camera and computer system to measure the positional parameter of trailing wheel;
In D, the steps A; When if said automobile is overlength flat-bed trailer or container car or trailer; Installing and locating target respectively on the front-wheel of automobile and the corresponding wheel rim of trailing wheel then; Use first video camera and computer system to measure the positional parameter of front-wheel then, use the 3rd video camera and computer system to measure the positional parameter of trailing wheel;
In E, the steps A; If said automobile is two back axle flat-bed trailers or two back axle container car; And when need measuring its trailing wheel parameter; Automobile gone forward to trailing wheel is positioned at the front-wheel situ, and on the corresponding wheel rim of two back axles the installing and locating target, use first video camera and computer system to measure the positional parameter of two back axles then.
In F, the steps A; If said automobile is three back axle flat-bed trailer or container cars; And when need measuring its trailing wheel positional parameter; Automobile gone forward to the wheel of first back axle is positioned at the front-wheel situ, and on first back axle, the corresponding wheel rim of second back axle installing and locating target, use first video camera and computer system to measure the positional parameter of first back axle, second back axle then; Then with the location target dismounting on second back axle, installing and locating target on the wheel rim of third rear axle uses first video camera and computer system to measure the positional parameter of third rear axle then.
The present invention has following beneficial effect:
The present invention uses the video camera of many group different focal to carry out the shooting value work of image; Overcome because the singularity of commercial car; Determined the length of wagon and the wheelbase of commercial car to differ greatly, one group of camera lens can't satisfy the problem for the measurement of the vehicle of the wheelbase of large span like this.Again because the driving system complicacy of commercial car is various; Particularly high capacity waggon adopts the chassis form of double steering bridge and many back axles usually; The present invention is through adopting channel-type metering system (be vehicle can go pass two columns); The vehicle of many axle suspensions is carried out segmentation detect, adopt this metering system can measure between many bridges depth of parallelism of many backs bridge vehicles, bridge parameters such as wheelbase simultaneously, improved measuring accuracy greatly.
Description of drawings
Fig. 1 is the structural representation of the transition type 3D four-wheel position finder of prior art;
Fig. 2 is the structural representation of the channel-type wheel alignment meter of preferred embodiment of the present invention;
Fig. 3 is the synoptic diagram of the channel-type wheel alignment meter practical measuring examples one of preferred embodiment of the present invention;
Fig. 4 is the synoptic diagram of the channel-type wheel alignment meter practical measuring examples two of preferred embodiment of the present invention;
Fig. 5 is the synoptic diagram of the channel-type wheel alignment meter practical measuring examples three of preferred embodiment of the present invention;
Fig. 6 is the synoptic diagram of the channel-type wheel alignment meter practical measuring examples four of preferred embodiment of the present invention.
Embodiment
Below, in conjunction with accompanying drawing and embodiment, the present invention done further describing, so that clearerly understand the present invention's technological thought required for protection.
As shown in Figure 2, a kind of channel-type wheel alignment meter, it comprises a computer system, four location targets, and with the wheel fixed mechanism (present embodiment adopts to take turns and presss from both sides) of the corresponding one by one assembling of location target.Four location targets are labeled as No. 1 location target, No. 2 location targets, No. 3 location targets, No. 4 location targets respectively.During state to be tested, the location target is mounted on the cabinet of computer system through the wheel folder of correspondence.
It also comprises column L, the column R that is oppositely arranged; Column L is equipped with LED signal lamp, first industrial camera, second industrial camera, the 3rd industrial camera from top to bottom successively; Column R also is equipped with LED signal lamp, first industrial camera, second industrial camera, the 3rd industrial camera from top to bottom successively, and the LED signal lamp on the column L, first industrial camera, second industrial camera, the 3rd industrial camera respectively with column R on LED signal lamp, first industrial camera, second industrial camera, the 3rd industrial camera become rotational symmetry to distribute; The LED infrared lamp all is installed around first industrial camera, second industrial camera, the 3rd industrial camera; Distance between column L and the column R is complementary with the transverse width of a tested vehicle, and promptly the distance between column L and the column R allows automobile current.The LED signal lamp of present embodiment can not need only as suggesting effect; And the LED infrared lamp sends floor light light as secondary light source, is convenient to first industrial camera, second industrial camera and the 3rd industrial camera photographic images.
LED signal lamp, first industrial camera, second industrial camera, the 3rd industrial camera all are connected with computer system.During measurement; First industrial camera and/or second industrial camera and/or the 3rd industrial camera are respectively applied for continuous shooting and are installed on the location target on the automobile rim and the image that photographs is transferred to computer system, and computer system draws the positional parameter of automotive wheel through computing.
Wherein, the camera lens of first industrial camera, second industrial camera, the 3rd industrial camera is tight shot, and the focal length of the camera lens of first video camera is 16mm; The focal length of the camera lens of second video camera is 24mm; The focal length of the camera lens of the 3rd video camera is 30mm.
The detection method of the channel-type wheel alignment meter of above-mentioned Fig. 2, concrete steps are following:
A, with before running car to two column, and the front-wheel of automobile is positioned at 2-5 rice, column the place ahead;
In B, the steps A; When if said automobile is double steering bridge lorry; As shown in Figure 3; Because the double steering bridge need measure the stub parameter of wheel simultaneously, so must use four location targets simultaneously, installing and locating target respectively on bridge of double steering bridge lorry and the corresponding wheel rim of two bridges then; Use first industrial camera and computer system to measure a bridge and the corresponding positional parameter of two bridge wheels of double steering bridge lorry then, concrete output result can see on the display screen of computer system;
In C, the steps A; When if said automobile is jubilee wagon or big bus car; As shown in Figure 4; No. 1 location target, No. 2 location targets then are installed on the wheel rim of the front-wheel of automobile; No. 3 location targets, No. 4 location targets are installed on the wheel rim of the trailing wheel of automobile, are used first industrial camera and computer system to cooperate No. 1 location target, No. 2 location target measurings to go out the positional parameter of front-wheel then, use second industrial camera and computer system to cooperate No. 3 location targets, No. 4 location target measurings to go out the positional parameter of trailing wheel;
In D, the steps A; When if said automobile is overlength flat-bed trailer or container car or trailer; As shown in Figure 5; No. 1 location target, No. 2 location targets then are installed on the wheel rim of the front-wheel of automobile; No. 3 location targets, No. 4 location targets are installed on the wheel rim of trailing wheel, are used first industrial camera and computer system to cooperate No. 1 location target, No. 2 location target measurings to go out the positional parameter of front-wheel then, use the 3rd industrial camera and computer system to cooperate No. 3 location targets, No. 4 location target measurings to go out the positional parameter of trailing wheel;
In E, the steps A; If said automobile is two back axle flat-bed trailers or two back axle container car; And when need measuring its trailing wheel parameter; Automobile gone forward to trailing wheel is positioned at the front-wheel situ, and on the corresponding wheel rim of two back axles the installing and locating target, use first industrial camera and computer system to measure the positional parameter of two back axles then.
In F, the steps A; If said automobile is three back axle flat-bed trailers or three back axle container cars; And when need measuring its trailing wheel parameter, as shown in Figure 6, automobile gone forward to the wheel of first back axle 100 is positioned at the front-wheel situ; And on first back axle 100, second back axle, 200 corresponding wheel rims the installing and locating target, use first industry and computer system to measure the geometric parameter of first back axle 100, second back axle 200 then; Then with the location target dismounting on second back axle 200, installing and locating target on the wheel rim of third rear axle 300 uses first industrial camera and computer system to measure the positional parameter of third rear axle 300 then.In fact, if the above automobile (as: greater than three back axle flat-bed trailers) of three back axles then can be taked progressively to measure the positional parameter of remaining back axle like the described method by the bridge measurement of this step.That is to say that behind the positional parameter that measures first back axle, second back axle and third rear axle, the location target on first back axle is not dismantled all the time; As standard target; And the location target dismounting on the third rear axle, and install on the 4th back axle, measure the positional parameter of the 4th back axle; The 5th back axle, the 6th back axle ... Positional parameter also be measurement like this, thereby measure many back axles automobile with the method for measuring by bridge.Thereby can once realize " preceding four backs eight ", the kingpin inclination of one, the two bridge depth of parallelisms, the angle of shrinking back, toe-in angle, camber angle and the propons (comprising the double steering bridge) of heavy many bridges long wheelbase trucks such as " preceding four backs four ", the detection and the adjustment of back rake angle.
The channel-type wheel alignment meter of present embodiment adopts the video camera of two or more sets different focal to take computing, and adopts the mounting means of two columns, and vehicle can in the middle of the left and right pillar camera, be passed.Wherein one group of camera adopts the camera lens of 16mm; Measure comparatively near wheel, and possess the high capacity waggon that can measure the double steering bridge simultaneously, middle video camera (i.e. second industrial camera) adopts the camera lens of focal length greatly; In order to measure the vehicle of relatively long wheelbase; Such as bus car, medium-sized container car etc., minimum camera (i.e. the 3rd industrial camera) uses the camera lens of maximum focal length, in order to measure the vehicle of longer wheelbase.The 3rd industrial camera can be used as the apolegamy function, mainly satisfies some users that measure overlength wooden handcart or container car and uses, therefore; The present invention not necessarily adopts three groups of cameras; As long as more than or equal to two groups of cameras, and the tight shot that adopts different focal, all should be within protection scope of the present invention.
In addition, the order of first industrial camera of present embodiment, second industrial camera, the 3rd industrial camera can also reconfigure, and for example the order of the camera on each column can be second industrial camera, the 3rd industrial camera, first industrial camera from top to bottom.The series arrangement of camera can be arranged according to actual needs again.Present embodiment also can not adopt industrial camera, and adopts the video camera of other models.The secondary light source of present embodiment can also be incandescent lamp, daylight lamp, flash bulb, LED visible light source lamp (like the LED red light) etc.
Present embodiment is only represented the channel-type measurement with two column modes, can also adopt many columns mode to use as hyperchannel in fact, and many vehicle are passed through, and measures simultaneously.And; The described column of present embodiment is only represented a kind of form of expression that has fixed function and can let vehicle pass through, for example; Be installed in camera set on irremovable two face walls; Distance between two face walls also allows vehicle to pass through, and so, this embodiment also should be within protection scope of the present invention.
Generally speaking, the major technique characteristics of present embodiment are following:
1) adopt the three-dimensional camera shooting technology: industrial camera is taken continuously and is installed on the location target on the automobile rim, and image transfer is arrived computing machine, and computer software carries out the space geometry computing according to these images, calculates the geometric parameter on wheel and chassis;
2) because the commercial car wheelbase is long, the restriction of camera subject camera lens " depth of field " uses the cameras of many group different focal to carry out the shooting value work of image;
Therefore 3) commercial car is more various than the driving system complicacy of passenger car, and the double steering bridge that particularly high capacity waggon adopted and the chassis form of many back axles adopt the channel-type metering system, the vehicle of many axle suspensions is carried out segmentation detect;
Because the singularity of commercial car; Determined the length of wagon and the wheelbase of commercial car to differ greatly; General jubilee wagon wheelbase is greatly about about 4 meters; And the wheelbase of high capacity waggon or semitrailer can meet or exceed more than 20 meters, and the size-dependence of camera subject camera lens " depth of field ", one group of camera lens can't satisfy the measurement for the vehicle of the wheelbase of large span like this.The depth of field is meant the axial depth that on the conjugate image plane of object plane, is sharply defined image, is exactly the distance (along camera lens optical axis) of tight shot ability shooting clear image in simple terms.Because the high-speed industrial camera pixel is limited; For improving the precision of images; Usually adopt focal length be 16mm to the camera lens between the 30mm, under equal lens aperture, the big more depth of field of focal length is more little; This just makes the camera set of organizing focal lengths must use intersect value more; And the captured image of the camera of all different focal must be unified under the same coordinate system, and many focal lengths camera calibration system of present technique exploitation is that present camera parameter with different focal of first success in the world is unified in the intrinsic coordinates system, and this has guaranteed fundamentally that also this measurement pattern is achieved.
For a person skilled in the art, can make other various corresponding changes and distortion, and these all changes and distortion should belong within the protection domain of claim of the present invention all according to the technical scheme and the design of above description.
Claims (10)
1. channel-type wheel alignment meter, it comprises a computer system, four location targets, and with the wheel fixed mechanism of the corresponding one by one assembling of location target; It is characterized in that; Also comprise two columns that are oppositely arranged; Each column is equipped with first video camera, second video camera from top to bottom successively, and first video camera on one of them column, second video camera respectively with another column on first video camera, second video camera become rotational symmetry to distribute; Distance between two columns is complementary with the transverse width of tested vehicle; First video camera, second video camera all are connected with computer system; First video camera and/or second video camera are respectively applied for continuous shooting and are installed on the location target on the automobile rim and the image that photographs is transferred to computer system, and computer system draws the positional parameter of automotive wheel through computing; Wherein, the camera lens of first video camera, second video camera is tight shot, and the focal length of the camera lens of first video camera, second video camera is all different.
2. channel-type automobile orientator as claimed in claim 1 is characterized in that the below of second video camera also is equipped with the 3rd video camera, and the 3rd video camera also is installed on the column; The 3rd video camera also is connected with computer system, also is used for taking continuously the location target that is installed on the automobile rim and the image that photographs is transferred to computer system; The camera lens of the 3rd video camera also is a tight shot, and the focal length of the camera lens of the focal length of the camera lens of the 3rd video camera and first video camera, second video camera is different.
3. channel-type as claimed in claim 2 wheel alignment meter is characterized in that the focal length of the camera lens of first video camera is 16mm; The focal length of the camera lens of second video camera is 24mm; The focal length of the camera lens of the 3rd video camera is 30mm.
4. channel-type as claimed in claim 3 wheel alignment meter is characterized in that said first video camera, second video camera, the 3rd video camera are industrial camera.
5. channel-type as claimed in claim 1 wheel alignment meter is characterized in that, around first video camera, second video camera secondary light source is installed all, and said secondary light source is LED infrared lamp or LED visible lamp source.
6. channel-type as claimed in claim 1 wheel alignment meter is characterized in that, said wheel fixed mechanism is the wheel folder.
7. based on the detection method of the described channel-type of claim 2 wheel alignment meter, it is characterized in that, may further comprise the steps:
A, with before running car to two column, and the front-wheel of automobile is positioned at 2-5 rice, column the place ahead;
In B, the steps A; When if said automobile is double steering bridge lorry; Then installing and locating target respectively on bridge of double steering bridge lorry and the corresponding wheel rim of two bridges uses first video camera and computer system to measure a bridge and the corresponding positional parameter of two bridge wheels of double steering bridge lorry then;
In C, the steps A; When if said automobile is jubilee wagon or big bus car; Installing and locating target respectively on the front-wheel of automobile and the corresponding wheel rim of trailing wheel then; Use first video camera and computer system to measure the positional parameter of front-wheel then, use second video camera and computer system to measure the positional parameter of trailing wheel;
In D, the steps A; When if said automobile is overlength flat-bed trailer or container car or trailer; Installing and locating target respectively on the front-wheel of automobile and the corresponding wheel rim of trailing wheel then; Use first video camera and computer system to measure the positional parameter of front-wheel then, use the 3rd video camera and computer system to measure the positional parameter of trailing wheel;
In E, the steps A; If said automobile is two back axle flat-bed trailers or two back axle container car; And when need measuring its trailing wheel parameter; Automobile gone forward to trailing wheel is positioned at the front-wheel situ, and on the corresponding wheel rim of two back axles the installing and locating target, use first video camera and computer system to measure the positional parameter of two back axles then.
8. detection method as claimed in claim 7; It is characterized in that, in the steps A, if said automobile is three back axle flat-bed trailer or container cars; And when need measuring its trailing wheel positional parameter; Automobile gone forward to the wheel of first back axle is positioned at the front-wheel situ, and on first back axle, the corresponding wheel rim of second back axle installing and locating target, use first video camera and computer system to measure the positional parameter of first back axle, second back axle then; Then with the location target dismounting on second back axle, installing and locating target on the wheel rim of the back axle the 3rd uses first video camera and computer system to measure the positional parameter of third rear axle then.
9. like claim 7 or 8 described detection methods, it is characterized in that the focal length of the camera lens of first video camera is 16mm; The focal length of the camera lens of second video camera is 24mm; The focal length of the camera lens of the 3rd video camera is 30mm.
10. like claim 7 or 8 described detection methods, it is characterized in that said first video camera, second video camera, the 3rd video camera are industrial camera.
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Cited By (14)
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| CN103196679A (en) * | 2013-03-27 | 2013-07-10 | 麦苗 | Remote control method and remote control system for car wheel locator |
| CN104316335A (en) * | 2014-11-19 | 2015-01-28 | 烟台开发区海德科技有限公司 | 3D automobile wheel positioner multi-camera calibration system and method |
| CN104819707A (en) * | 2015-04-23 | 2015-08-05 | 上海大学 | Polyhedral active cursor target |
| CN106813599A (en) * | 2017-03-23 | 2017-06-09 | 深圳市鹰眼在线电子科技有限公司 | Automobile camera shooting measurement assembly and automobile three-dimensional four-wheel aligner method and system |
| CN106949857A (en) * | 2017-03-29 | 2017-07-14 | 鹤山市黑豹电子机械制造有限公司 | A kind of high capacity waggon tire localization method |
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| CN107767725A (en) * | 2017-11-27 | 2018-03-06 | 安徽安凯汽车股份有限公司 | A kind of rear bridge driven intelligent teaching controls practice teaching table |
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| CN108181115A (en) * | 2018-01-11 | 2018-06-19 | 桂林施瑞德科技发展有限公司 | 3D Wheel Aligner for Long Wheelbase Vehicles |
| CN108909834A (en) * | 2018-07-19 | 2018-11-30 | 中国重汽集团济南动力有限公司 | A kind of heavy truck wheel straight trip positioning adjustment device, method and terminal |
| CN111336951A (en) * | 2018-12-18 | 2020-06-26 | 大陆汽车有限责任公司 | Method and apparatus for calibrating external parameters of image sensor |
| CN114018164A (en) * | 2021-10-22 | 2022-02-08 | 广西壮族自治区计量检测研究院 | Method and device for detecting automobile wheelbase difference |
| WO2022057681A1 (en) * | 2020-09-21 | 2022-03-24 | 深圳市道通科技股份有限公司 | Wheel alignment system |
| CN114739301A (en) * | 2022-04-07 | 2022-07-12 | 深圳市道通科技股份有限公司 | Vehicle body height measuring method |
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| CN104819707B (en) * | 2015-04-23 | 2018-07-13 | 上海大学 | A kind of polyhedron active light target |
| CN104819707A (en) * | 2015-04-23 | 2015-08-05 | 上海大学 | Polyhedral active cursor target |
| WO2018010346A1 (en) * | 2016-07-15 | 2018-01-18 | 李开文 | Four wheel locator having wide measuring range |
| CN106813599A (en) * | 2017-03-23 | 2017-06-09 | 深圳市鹰眼在线电子科技有限公司 | Automobile camera shooting measurement assembly and automobile three-dimensional four-wheel aligner method and system |
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| CN106949857A (en) * | 2017-03-29 | 2017-07-14 | 鹤山市黑豹电子机械制造有限公司 | A kind of high capacity waggon tire localization method |
| CN107767725B (en) * | 2017-11-27 | 2023-10-13 | 安徽安凯汽车股份有限公司 | Real standard platform of rear axle drive teaching intelligent control teaching |
| CN107808582A (en) * | 2017-11-27 | 2018-03-16 | 安徽安凯汽车股份有限公司 | A kind of rear bridge driven teaching fixing device |
| CN107808582B (en) * | 2017-11-27 | 2023-10-13 | 安徽安凯汽车股份有限公司 | Rear axle drive fixing device for teaching |
| CN107767725A (en) * | 2017-11-27 | 2018-03-06 | 安徽安凯汽车股份有限公司 | A kind of rear bridge driven intelligent teaching controls practice teaching table |
| CN108181115B (en) * | 2018-01-11 | 2023-08-11 | 桂林施瑞德科技发展有限公司 | 3D Wheel Aligner for Long Wheelbase Vehicles |
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| CN108909834A (en) * | 2018-07-19 | 2018-11-30 | 中国重汽集团济南动力有限公司 | A kind of heavy truck wheel straight trip positioning adjustment device, method and terminal |
| CN111336951B (en) * | 2018-12-18 | 2021-12-21 | 大陆汽车有限责任公司 | Method and apparatus for calibrating external parameters of image sensor |
| CN111336951A (en) * | 2018-12-18 | 2020-06-26 | 大陆汽车有限责任公司 | Method and apparatus for calibrating external parameters of image sensor |
| WO2022057681A1 (en) * | 2020-09-21 | 2022-03-24 | 深圳市道通科技股份有限公司 | Wheel alignment system |
| CN114018164A (en) * | 2021-10-22 | 2022-02-08 | 广西壮族自治区计量检测研究院 | Method and device for detecting automobile wheelbase difference |
| CN114018164B (en) * | 2021-10-22 | 2024-08-06 | 广西壮族自治区计量检测研究院 | Automobile wheelbase difference detection method and equipment |
| CN114739301A (en) * | 2022-04-07 | 2022-07-12 | 深圳市道通科技股份有限公司 | Vehicle body height measuring method |
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