CN202814714U - 3D four-wheel position finder needing no car pushing - Google Patents
3D four-wheel position finder needing no car pushing Download PDFInfo
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- CN202814714U CN202814714U CN 201220227906 CN201220227906U CN202814714U CN 202814714 U CN202814714 U CN 202814714U CN 201220227906 CN201220227906 CN 201220227906 CN 201220227906 U CN201220227906 U CN 201220227906U CN 202814714 U CN202814714 U CN 202814714U
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Abstract
The utility model discloses a 3D four-wheel position finder needing no car pushing. The position finder comprises an image processing and analysis general module, an automobile location compensation module, a hardware parameter compensation module, two cameras, and four target disks with regular patterns. The product can overcome the defect that a 3D four-wheel position finder needing car pushing is complicated in operation, the target disks are hanged, and car pushing is not needed, a test can be conducted directly, the use is very simple, and the data is relatively accurate. Directing at the characteristic that car pushing of a 3D four-wheel position finder needing car pushing in the market is complicated, the product does not need car pushing, the target disks are mounted to conduct measurement directly. The use technology of the product is totally different from that of a 3D four-wheel position finder needing car pushing, the 3D four-wheel position finder needing car pushing makes use of the changes of the positions of target disks before and after pushing a car to calculate positioning data of four wheels of the car, and the product makes use of the spacial structure of the target disks to calculate positioning data of four wheels of the car.
Description
Technical field
The utility model relates to the automobile four-wheel field of locating technology, in particular a kind of 3D four-wheel position finder that does not need go-cart.
Background technology
Common four-wheel position finder on the present market, mainly in the majority with laser type and 3D, other also have PSD and CCD etc.
The PSD four-wheel position finder is a kind of old-fashioned traditional four-wheel position finder; he utilizes laser to propagate in air is the characteristics of straight line; the main accessory of its equipment is; four sensors; each sensor can receive laser and Emission Lasers, when automobile carries out the four-wheel position monitor, four sensors is hung on four tires; the laser of the sensor in left side is beaten on the sensor on right side; the photosensitive-member of sensor converts light signal to position signalling, is input to computer, thereby finishes position monitor; in like manner; the laser lamp of the sensor on right side is beaten on the sensor in left side, and the completing place is detected, and this sensor is high especially to the requirement of light; as daytime and evening light variation large; disturb greatly, often can occur and can't monitor, it is larger perhaps to detect error; the situations such as the easy damage of spare and accessory parts, but certain market is arranged now.
The 3D four-wheel position finder principle of operation of existing go-cart is, on the automobile suspension behind the destination disk, each people before and after the automobile, click the current state of computer record destination disk this moment, then the automobile outrunner, with slowly backward go-cart of automobile, approximately promote the distance of passing by of 20 ° of tire rotations, this moment computer record current goal dish state, then back one people slowly pushes away car forward, also be approximately to promote 20 ° of distances of passing by of tire rotation, shift original position onto.The state of the current destination disk of computer record this moment.Twice go-cart before and after altogether needing, because the doughnut model is in different size, so diameter of tyres is different, so go-cart distance different (about 20 ° of go-cart tire rotation) if go-cart is not in place, has perhaps pushed through, need to continue to push away, until shift the position that needs onto, therefore operation is very complicated
3D four-wheel position finder on the market needs toward about 20 ° of pusher when doing the automobile four-wheel location, push away again about 20 ° forward, if push away not in placely, push away before and after needing repeatedly, complicated operation, and the data out of true moves forward and backward by this artificial go-cart, the variation of the front and back position by car body, obtain the four-wheel locator data, short about 5 minutes of time can push away, and all may not push away more than the half an hour of time length, and can't do the tire compensation.The 3D four-wheel position finder of go-cart comes from the national products such as American-European the earliest, now very general in American-European countries, also very general in China, this orientator adopts image recognition technology, utilize the industrial camera collection of high definition to hang over image information on the wheel destination disk, manually shift wheel onto and move forward and backward, obtain its coordinate and angle.Utilize the conversion of destination disk position, the about 20 ° of front and back of go-cart to extrapolate the automobile four-wheel locator data.
Chinese patent application number is 201020677907.9 novel four-wheel position finder, improve on basis at the 3D of go-cart four-wheel position finder, this patent adopts digital ccd image technology, horizontal 4 infrared emission of high precision become the 32 totally-enclosed light velocity measurements of bundle and utilize the mobile sensor technology to finish the measurement of 3D dynamic image at the car body quadrilateral, therefore four-wheel position finder can be finished toe-in fast and accurately, camber, reverse caster, Kingpin inclination and thrust angle, the mensuration of the wheel positional parameters such as wheel beat and the monitoring of wheelbase wheelspan length.This patented technology also is a kind of 3D four-wheel position finder that needs go-cart.
Therefore, there is defective in prior art, needs to improve.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of 3D four-wheel position finder that does not need go-cart for the deficiencies in the prior art.
The technical solution of the utility model is as follows:
A kind of 3D four-wheel position finder that does not need go-cart, the destination disk that comprises the total module of image processing and analyzing, automobile position compensating module, hardware parameter compensating module, two cameras, four regular patterns, two cameras are fixed on the two ends, the left and right sides of camera cross bar, left camera is taken the destination disk that is fixed on the near front wheel and the destination disk that is fixed on left rear wheel simultaneously, and right camera is taken the destination disk that is fixed on off-front wheel and the destination disk that is fixed on off hind wheel simultaneously; The emission invisible light LED lamp group of high brightness is housed on the camera; Control two cameras and grab the destination disk colour picture, in the total module of image processing and analyzing, utilize opencv that this colour picture is converted to black and white picture, then obtain this destination disk profile, in 3D imaging space analysis module, analyze the 3D imaging space coordinate that obtains the destination disk profile, be converted to Cartesian coordinates through the Cartesian coordinates modular converter and namely get destination disk in the position in space, can calculate acquisition four-wheel locator data in the position in space according to this destination disk, then carry out the automobile position compensation at the automobile position compensating module, in the hardware parameter compensating module, carry out at last the hardware parameter compensation, this moment, the four-wheel locator data after over-compensation was only real automobile four-wheel locator data, can show at data disaply moudle, and record, print.
Described 3D four-wheel position finder, described cross bar is positioned at the vehicle front position, and camera cross bar length is 1515mm, and the cross bar perpendicular direction is in lifting machine carriage or trench track; Cross bar keeps horizontal positioned, and the centre distance of the rotation angle disk on cross bar and lifting machine carriage or the trench track: horizontal direction is 2700mm, vertical direction 490mm, and the center of cross bar and lifting machine carriage or trench track intersect at the center line of automobile fore-and-aft direction.
Described 3D four-wheel position finder, two destination disks of described vehicle front are the black round square matrix of 5*5=25 rule, and two destination disks of automobile back wheel are the black round square matrix of 6*6=36 rule.
Described 3D four-wheel position finder, only have two kinds of colors on the described destination disk: complete black circle and complete white bottom surface, (be fixed on after on the front and back wheel by the four paws anchor clamps with the inner underside of each destination disk, take near a side of automobile as inboard) black circle as the first row first row as benchmark, each destination disk increases a white circle at the second row secondary series, white diameter of a circle is about half of black circular diameter, the center of circle of Bai Yuan forms this Bai Yuanwei reference circle of black annulus take the center of circle of the black circle of the second row secondary series as the center of circle.
Described 3D four-wheel position finder, the principle of described automobile position compensation is that the position of central point of four destination disks will calculating is as the present position of automobile, compare with the position of the track on the lifting machine carriage at automobile place or trench both sides, the position recovering that automobile is present is the position that is parallel to the carriage of track or lifting machine, carry out the automobile position compensation data, this step is used for the Compensation Objectives dish at location parameter, wheelbase, the wheelspan in space.
Described 3D four-wheel position finder, described hardware parameter compensation is the making error parameter of destination disk, the making error parameter of destination disk is demarcated frame by standard and is demarcated when dispatching from the factory, leave in the database, deduct the making error parameter in advance demarcated with the data of trying to achieve this moment, is used for compensation camber angle, toe-in angle, wheelspan.
Described 3D four-wheel position finder, described 3D four-wheel position finder also is used for the tire compensation, the method of tire compensation is that automobile is lifted with the lifting machine carriage, four tires are in vacant state, the four paws anchor clamps are clipped on some positions of tyre rim, control camera crawl destination disk picture is also analyzed, camber angle and toe-in angle data after analyzing are stored in the internal memory, then take off the four paws anchor clamps, manually with automobile working direction about 180 ° of the tire that turns clockwise, again the four paws anchor clamps are clipped on the tire, four paws clamp destination disk, regulate the destination disk pattern as far as possible towards the automobile dead ahead, control camera crawl destination disk picture is also analyzed, and camber angle and toe-in angle data after analyzing are stored in the internal memory; Camber angle and the toe-in angle of this twice measurement are taken the mean respectively camber angle and toe-in angle after the tire compensation that Here it is.
This product can overcome the 3D four-wheel position finder complicated operation defective of go-cart, hangs up destination disk, does not need go-cart, and directly test is used very simply, and data are more accurate.For the characteristics of the 3D four-wheel position finder go-cart complexity of go-cart on the market, this product does not need go-cart, directly measures by upper destination disk.
Accurately whether problem can't physical verification for the 3D four-wheel position finder measurement data of go-cart, and this product can add laser lamp, and by physical verification, whether data are accurate.Through multiple authentication, this product measurement data and real data error can be controlled within 0 °～0.1 ° fully, meet location requirement fully.
This product passes through camera imaging, physical arrangement according to image and destination disk, the restore target dish is in the position in space, thereby accurately calculates the four-wheel locator data of automobile, and the four-wheel of go-cart location utilizes the conversion of the position of target before and after the go-cart to calculate the four-wheel locator data of automobile.
The laser lamp that this product can externally be got ready, the characteristics of rectilinear propagation in air by light, point is got at a distance (for example 10 meters) verify the data of this product by the geometric transformation in space accuracy, and the 3D four-wheel position finder of go-cart can't be verified with physical method, that is to say, whether the data that the 3D four-wheel position finder of go-cart is calculated are accurate, can't verify with physical method.
The 3D four-wheel position finder operation technique of this product operation technique and go-cart is fully different, the 3D four-wheel position finder of go-cart utilizes the variation of destination disk position, automobile go-cart front and back to calculate the four-wheel locator data of automobile, and the space structure of this product utilization destination disk is calculated the automobile four-wheel locator data.
Description of drawings
Fig. 1 is the overall flow figure that the utility model does not need the 3D four-wheel position finder of go-cart;
Fig. 2 is back rake angle, leaning angle test module process flow diagram;
Fig. 3 is destination disk locus synoptic diagram;
Fig. 4 is the destination disk structural representation, and 4-1 is front view, and 4-2 is side view;
Fig. 5 is automobile four-wheel locator data measuring principle;
Embodiment
Below in conjunction with specific embodiment, the utility model is elaborated.
Embodiment 1
The used main accessory of this product, a high configuration computer server, two high resolution industrial digital cameras, camera is fixed on the two ends of camera cross bar, cross bar is positioned at the vehicle front position, camera cross bar length is about 1515mm, and the cross bar perpendicular direction is in lifting machine carriage or trench track.Cross bar keeps horizontal positioned, and the centre distance of the rotation angle disk on cross bar and lifting machine carriage or the trench track, horizontal direction approximately are 2700mm (measuring during practical operation).The about 490mm of vertical direction, intersect at the center line of automobile fore-and-aft direction with lifting machine carriage or trench track as far as possible at the center of cross bar.Such two cameras can photograph respectively revolver and right wheel of automobile, left camera is taken the destination disk that is fixed on the near front wheel and the destination disk that is fixed on left rear wheel simultaneously, and right camera is taken the destination disk that is fixed on off-front wheel and the destination disk that is fixed on off hind wheel simultaneously.
Because the importance of vehicle front location is far longer than the trailing wheel location, so some new cars are only done front alignment and can be satisfied the demands.This product can only be done front alignment, is exactly only to hang up two destination disks of front-wheel.When satisfying location requirement, more simplified like this positioning action, and the 3D four-wheel of go-cart location, judged whether to push away the distance of 20 ° of vehicle wheel rotations during go-cart take some destination disks of trailing wheel as benchmark, therefore, the 3D four-wheel of go-cart location must hang four destination disks.Complicated operation.
The camera horizontal direction is placed, and downward-sloping about 8.3 °, the camera front end is equipped with one group of precise Gaussian wide angle plane camera lens, and the emission invisible light LED lamp group (about 120) of high brightness is housed on the camera.The destination disk of four regular patterns.With reference to figure 4, Fig. 4 is two destination disks of vehicle front, only have two kinds of colors on the destination disk: complete black circle and complete white bottom surface, two destination disks of vehicle front are the black round square matrix of 5*5=25 rule, two destination disks of automobile back wheel are slightly larger than front-wheel, are the black round square matrix of 6*6=36 rule.(be fixed on after on the front and back wheel by the four paws anchor clamps with the inner underside of each destination disk, take near a side of automobile as inboard) black circle as the first row first row as benchmark, each destination disk increases a white circle at the second row secondary series, white diameter of a circle is about half of black circular diameter, the center of circle of Bai Yuan is take the center of circle of the black circle of the second row secondary series as the center of circle, form the black annulus, white diameter of a circle is about half of black circular diameter, this Bai Yuanwei reference circle.When the destination disk position is moved, with the relatively variation of front and back position of this Bai Yuanwei object of reference.The white portion of destination disk is reflectorized material, can reflect this invisible light.Two front-wheels of automobile are placed on respectively on two high strength rotation angle disks, and fillet scale and pointer are arranged on the rotation angle disk, can read the angle of rotation when the tire left and right directions rotates.
With steering wheel return just, four destination disks are clipped on four tyre rims of automobile by high-accuracy clamp.Regulate camera lens, allow light still less enter in the camera, open the LED lamp of emission invisible light, the part of white can reflect this invisible light in camera on the destination disk like this, other parts then can not reflect, and have just formed so chequered with black and white image (black image is the black circle on the destination disk) in camera.
Read the also detail parameters such as focal length of photokymograph, and this parameter is kept in the computing machine in order to using.Camera is kept in the computing machine location parameter of camera in order to using.
With reference to figure 1, for the utility model does not need the overall flow figure of the 3D four-wheel position finder of go-cart, automobile is reached on the carriage of lifting machine or on the track of trench, vehicle front is parked in the center of rotation angle disk as much as possible.Destination disk is hung on the automobile tyrerim by the four paws anchor clamps.Rolling target dish (destination disk axle can free 360 ° of rotations) makes the pattern of destination disk as far as possible towards the automobile dead ahead.
Open computer, enter the four-wheel finder, input this car license number, from database, select this vehicle according to the model of automobile, just read so the standard four-wheel locator data of this vehicle in the computer.
At first control camera and grab destination disk colour picture in the camera, in the total module of image processing and analyzing, utilize opencv that this colour picture is converted to black and white picture, then obtain this destination disk profile, in 3D imaging space analysis module, analyze the 3D imaging space coordinate that obtains the destination disk profile, be converted to Cartesian coordinates through the Cartesian coordinates modular converter and namely get destination disk in the position in space, can calculate acquisition four-wheel locator data in the position in space according to this destination disk, then carry out the automobile position compensation at the automobile position compensating module, in the hardware parameter compensating module, carry out at last the hardware parameter compensation, this moment, the four-wheel locator data after over-compensation was only real automobile four-wheel locator data, can show at data disaply moudle, and record, print.
Staff this moment can according to detect on the computer the four-wheel locator data, four-wheel locator data scope with standard compares, the vehicles chassis, be adjusted to the four-wheel locator data of automobile in the four-wheel locator data scope of standard, the four-wheel locator data after computer meeting this moment real-time update is adjusted.
Back rake angle, camber angle, the toe-in angle of automobile are adjusted in the four-wheel locator data scope of standard, save data is in order to checking next time.Data-printing, with data-printing to paper.
The utility model can measured automobiles the camber angle, toe-in angle, the thrust angle of whole automobile, the angle of shrinking back, Y-axis of leaning angle, back rake angle, front-wheel and trailing wheel of front-wheel apart from, wheel base, can also carry out the tire compensation.Below each embodiment introduce respectively its measuring process and principle.
Embodiment 2
With reference to figure 2, measure toe-in of front wheel angle, back rake angle (choosing is done, because first be that introversion hypsokinesis test operation is comparatively complicated, the secondth, the bearing circle comfortable feel does not need to proofread and correct, and therefore mostly repairs master workers and does not do this project):
The leaning angle of front-wheel and back rake angle, leaning angle refers to the angle of stub axle and tire, back rake angle refers to the angle of stub axle and terrestrial gravitation direction, the measuring method of kingpin inclination and back rake angle is, returning positive dirction makes an inventory and hits the current destination disk state of computer record, control camera crawl destination disk picture is also analyzed, flare and front beam data after analyzing are stored in the internal memory, then rotate bearing circle left, (these number of degrees are known to allow two front-wheels rotate β °, the fillet scale is arranged on the rotation angle disk, can read by the pointer that rotation angle disk carries.20 ° of general selections, be determined on a case-by-case basis), again click the state of the current destination disk of computer record this moment, control camera crawl destination disk picture is also analyzed, flare and front beam data after analyzing are stored in the internal memory, and then rotate bearing circle to the right and allow β ° of two front-wheels rotation, again click the state of the current destination disk of computer record this moment, control camera crawl destination disk picture is also analyzed, flare and front beam data after analyzing are stored in the internal memory, according to flare and front beam data that the state of this destination disk of three times is tried to achieve, computer just can calculate front-wheel kingpin inclination and back rake angle.Annotate: this algorithm can be with reference to total the 113rd phase the 13rd page base of magazine " highway and automotive " in the measuring principle at the main pin of automobile inclination angle of geometric relationship.
Embodiment 3
With reference to figure 5, the camber angle of front and back wheel, toe-in angle test: the camber angle of front-wheel and trailing wheel, the angle of finger wheel tire and terrestrial gravitation line, this angle tire upper part deflection is outer for just, is partial to interior for negative.The toe-in angle of front-wheel and trailing wheel, refer to the angle of tire and automobile fore-and-aft direction, the tire front is inwardly for just, outwards for negative, because destination disk is to be clipped on the tyre rim by high precision four paws anchor clamps, by the locus of the destination disk that calculates above, can be in the hope of flare and the toe-in of destination disk, the flare of doughnut and toe-in are exactly flare and the toe-in of the destination disk of correspondence so.
At first control camera and grab destination disk colour picture in the camera, utilize opencv that this colour picture is converted to black and white picture.Therefore then obtain the profile of this picture, this picture is the imaging of destination disk in camera, be the projection that the black round matrix of the rule of front-wheel and two inclinations of trailing wheel is pressed certain angle.The profile that utilization is tried to achieve calculates the position of the center of circle in picture of each black circle, because black circular projection is the irregular roundness of similar ellipse, utilizes opencv can try to achieve the position of the center of circle in picture of this group circle.
The position of the center of circle in picture according to camera lens parameter and this group circle utilizes lens computing formula l/f=l/u+l/V, f: focal length; U: object distance; V: image distance, all black circles are in the position in space on the restore target dish.These computing method had two steps, can be with reference to " opencv Chinese website " (http://www.opencv.org.cn/index.php/%E9%A6%96%E9%A1%B5), the first step is with reference to " profile (Contour) detection " and " profile (Contour) detects 2 ", can obtain the profile of all black circles, the profile of black circle is pixel scale in image, this rank can not satisfy bearing accuracy, therefore is modified to the sub-pix rank, and precision greatly improves; Second step utilizes all black round positions in the space on each black round reference by location " camera calibration " and " camera calibration and three-dimensional reconstruction " restore target dish.
No matter how rotate according to destination disk, the axle of destination disk is inserted in the reason of invariant position in the aperture of four paws anchor clamps, all black circles that calculate by the upper step the structure of the position in space and destination disk reality utilize space multistory calculate for how much on the destination disk axle a bit.
Fig. 3 is destination disk geometry figure, in the square target dribbling one axle (with reference to figure 4) is arranged, this axle passes the center of destination disk sideling, the axle center of this axle is axial line, axial line passes the center of destination disk, and axial line is at a certain angle with the plane of destination disk, approximately is 35 °, the diameter of axle has two kinds of 18mm and 16mm, and axle can insert on the axle center hole of four paws anchor clamps.ABCD is the plane that destination disk forms among Fig. 3, O is the intersection point of AC and BD, OE is the destination disk axial line, OE is perpendicular to the ABE plane, OE is perpendicular to AE so, FE, BE, ∠ EOF is the angle of axial line OE and destination disk plane ABCD so, this angle is known angle [alpha], namely 35 °, calculate the Cartesian coordinates of the ABCDO of destination disk by the destination disk imaging, according to above geometric relationship, the Cartesian coordinates that just can order in the hope of E, the Cartesian coordinates of all key points of destination disk is all calculated and has been finished like this, this destination disk has just been known in the position in space so, and the camber angle of this destination disk is exactly the camber angle of corresponding doughnut so, and the toe-in angle of this destination disk is exactly the toe-in angle of corresponding doughnut, this model is solid geometric pattern, and the data of calculating are accurately.
Embodiment 4
With reference to figure 5, utilize the locus of four destination disks obtained above can calculate the wheelbase wheelspan of automobile and the information such as angle, thrust angle of shrinking back.The distance of tire before and after wheelbase refers to, wheelspan refers to the distance of left and right sides tire.The computing method of wheelbase are, the center of former and later two corresponding destination disks poor.The computing method of wheelspan are that the center of two destination disks is poor about correspondence, deducts two destination disk centers to the distance of four paws angle, deducts a tire thickness.The thrust angle is that the automobile back wheel line is done a perpendicular line, and this perpendicular line is called thrust line.Deflection is for just to the left for the relative longitudinal axis of thrust line, and deflection is for negative to the right, and this thrust angle is easy to calculate by the center of four destination disks.Front tyre on one side tire than in addition on one side tire comparatively step back as shrinking back the angle, the right angle of just shrinking back that is called when taking turns with respect to revolver forward, the right wheel is called the negative angle of shrinking back when stepping back with respect to revolver, this angle of shrinking back is easy to calculate by the center of four destination disks.
But the data of this moment are inaccurate, and also need the data outside toe-in of front wheel angle and the back rake angle are carried out automobile position compensation and hardware parameter compensation.
Automobile reaches on the track or on the lifting machine time, it is the carriage that is parallel to track or lifting machine under the default situations, but driver's so standard of driving under the actual conditions, need to carry out the automobile position compensation this moment, the principle of automobile position compensation is that the position of the central point of four destination disks will calculating is automobile position, compare with the position of the track on the lifting machine carriage at automobile place or trench both sides, the position recovering that automobile is present is the position that is parallel to the carriage of track or lifting machine, carries out the automobile position compensation data.This step is mainly used in the location parameter of Compensation Objectives dish in the space, wheelbase, wheelspan.
After carrying out the automobile position compensation, next carry out the hardware parameter compensation, because making, hardware has error, hardware parameter mainly is the making error parameter of target, and the error parameter of target is demarcated frame by standard and demarcated when dispatching from the factory, leave in the database, this moment the data of trying to achieve are deducted the error parameter of demarcating in advance, the main compensation of this compensation flare, toe-in, wheelspan, after compensation this moment, data have just been proofreaied and correct.
The data of calculating through the upper step are only real automobile four-wheel locator data, and data are shown on the computer screen.
Staff this moment can according to detect on the computer the four-wheel locator data, four-wheel locator data scope with standard compares, the vehicles chassis, be adjusted to the four-wheel locator data of automobile in the four-wheel locator data scope of standard, the four-wheel locator data after computer meeting this moment real-time update is adjusted.
Hypsokinesis (choosing is done) angle, camber angle, the toe-in angle of automobile are adjusted in the four-wheel locator data scope of standard, and save data is in order to checking next time.
This moment, an automobile was finished with regard to verification, from above step, artificial all operations only are to hang up destination disk, open computer, then input license number and selection vehicle are to adjust vehicle, there is not other any unnecessary operation, therefore this product has been simplified the operating process of four-wheel location greatly, and data are more accurate, operate very simple.
The method that this product provides can also be carried out physical verification, utilizes the method for physics that error is amplified, thereby verifies the accuracy of this product.The physical verification method of this product is that high precision four paws anchor clamps are clipped on the tyre rim, and destination disk is clipped on the four paws anchor clamps, and the laser lamp of getting ready is fixed on the four paws anchor clamps.The point of laser lamp is got at a distance on the wall of (for example 10 meters), then done a record (A point) at luminous point.Then steering wheel rotation makes its tire forward a little an angle at left and right directions gently, the point of laser lamp can be got another one point (B point) by the wall beyond 10 meters so, measure out distance between AB with a yardstick, suppose that AB length is 100mm, the angle that the front and back of calculating with this product so simultaneously are twice is poor to be α, the numerical value of tan (α) * 10000 (10000mm is 10 meters) is between 97～103mm so, and is very identical by the data of physical verification.Thereby proved the data accuracy of this product.
This product is through test of many times, data stability is very good, measurement data stability has two methods to detect respectively the stability of computer program and the stability of hardware, the first detects the stability of computer program, measures the value of flare toe-in, and data are recorded by hand, keep the destination disk position motionless, behind the shut down of computer, again open and measure flare and prenex value, it is the same that the data of at this moment measuring are caught up with inferior data.
The second is the stability of detection hardware, measure the value of flare toe-in, data are recorded by hand, then take off destination disk, take off the four paws anchor clamps, then the four paws anchor clamps are clipped in the same position of automobile tyrerim last time, destination disk is clipped on the four paws anchor clamps, as far as possible towards vehicle front, the data of the flare toe-in that measure this moment are caught up with the data of time hand-kept and are compared with the pattern of destination disk, little difference is arranged, repeatedly measurement data difference is less than 0.1 °, and these number of degrees satisfy the demands, and this difference is because different the causing of dynamics of using during clamper on twice of the precision of four paws anchor clamps and the front and back.
Through the measurement of top several steps, can verify that the stability of this product and corner number of degrees measurement difference all are to meet location requirement fully.
Embodiment 5
Tire is after long-time the use, and wheel hub can be out of shape, and doing the location best bet this moment is to carry out the tire compensation, and the utility model can also carry out the tire compensation.
The tire compensation is an important content in the four-wheel location, the tire compensation is that diverse location on tyre rim is measured to the flare of automobile and toe-in, averaged, hub is the circle of a standard in theory, but after automobile is exercised for a long time or is knocked, hub is out of shape, the method of tire compensation is that automobile is lifted with the lifting machine carriage, four tires are in vacant state, the four paws anchor clamps are clipped on some positions of tyre rim, control camera crawl destination disk picture and according to the methods analyst of embodiment 1, flare and front beam data after analyzing are stored in the internal memory, then take off the four paws anchor clamps, because the place that lifting machine lifts is the domain of automobile, four tires are unsettled, so manually can rotate freely, manually with automobile working direction about 180 ° of the tire that turns clockwise, again the four paws anchor clamps are clipped on the tire, four paws clamp destination disk, regulate the destination disk pattern as far as possible towards the automobile dead ahead, control camera crawl destination disk picture is also analyzed, and flare and front beam data after analyzing are stored in the internal memory; Flare and the toe-in of this twice measurement are taken the mean respectively, and flare and toe-in after the compensation of Here it is tire if automobile on the trench track, need to be held the automobile domain with the cart jack on the trench, are lifted automobile and are made that tire is unsettled does the tire compensation.
And need the 3D four-wheel location of go-cart because the four paws anchor clamps are clipped on the same position of tyre rim always, and therefore can't do the tire compensation, can't improve the locator data accuracy.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection domain of the utility model claims.
Claims (4)
1. 3D four-wheel position finder that does not need go-cart, it is characterized in that, the destination disk that comprises two cameras, four regular patterns, two cameras are fixed on the two ends, the left and right sides of camera cross bar, left camera is taken the destination disk that is fixed on the near front wheel and the destination disk that is fixed on left rear wheel simultaneously, and right camera is taken the destination disk that is fixed on off-front wheel and the destination disk that is fixed on off hind wheel simultaneously; The emission invisible light LED lamp group of high brightness is housed on the camera.
2. 3D four-wheel position finder according to claim 1 is characterized in that, described cross bar is positioned at the vehicle front position, and camera cross bar length is 1515mm, and the cross bar perpendicular direction is in lifting machine carriage or trench track; Cross bar keeps horizontal positioned, and the centre distance of the rotation angle disk on cross bar and lifting machine carriage or the trench track: horizontal direction is 2700mm, vertical direction 490mm, and the center of cross bar and lifting machine carriage or trench track intersect at the center line of automobile fore-and-aft direction.
3. 3D four-wheel position finder according to claim 1, it is characterized in that, two destination disks of described vehicle front are the square matrix that comprises the black circle of 5*5=25 rule, and two destination disks of automobile back wheel are the square matrix that comprises the black circle of 6*6=36 rule.
4. 3D four-wheel position finder according to claim 1, it is characterized in that, inner underside take each destination disk on the described destination disk is black round as the first row first row, each destination disk increases a white circle at the second row secondary series, white diameter of a circle is about half of black circular diameter, the center of circle of Bai Yuan forms the black annulus take the center of circle of the black circle of the second row secondary series as the center of circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220227906 CN202814714U (en) | 2012-05-18 | 2012-05-18 | 3D four-wheel position finder needing no car pushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220227906 CN202814714U (en) | 2012-05-18 | 2012-05-18 | 3D four-wheel position finder needing no car pushing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202814714U true CN202814714U (en) | 2013-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220227906 Expired - Fee Related CN202814714U (en) | 2012-05-18 | 2012-05-18 | 3D four-wheel position finder needing no car pushing |
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| Country | Link |
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| CN (1) | CN202814714U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236926A (en) * | 2014-09-01 | 2014-12-24 | 深圳市圳天元科技开发有限责任公司 | Four-wheel positioning method and positioning instrument system capable of being used in two-pillar lifter and small shearing lifter |
-
2012
- 2012-05-18 CN CN 201220227906 patent/CN202814714U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236926A (en) * | 2014-09-01 | 2014-12-24 | 深圳市圳天元科技开发有限责任公司 | Four-wheel positioning method and positioning instrument system capable of being used in two-pillar lifter and small shearing lifter |
| CN104236926B (en) * | 2014-09-01 | 2018-07-17 | 深圳市圳天元科技开发有限责任公司 | It is a kind of to can be used in two columns or the small four-wheel aligner method for cutting lifting machine and position indicator system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20140518 |