CN115144206B - A calibration target and a K&C test method based on the calibration target - Google Patents
A calibration target and a K&C test method based on the calibration target Download PDFInfo
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- PCTMTFRHKVHKIS-BMFZQQSSSA-N (1s,3r,4e,6e,8e,10e,12e,14e,16e,18s,19r,20r,21s,25r,27r,30r,31r,33s,35r,37s,38r)-3-[(2r,3s,4s,5s,6r)-4-amino-3,5-dihydroxy-6-methyloxan-2-yl]oxy-19,25,27,30,31,33,35,37-octahydroxy-18,20,21-trimethyl-23-oxo-22,39-dioxabicyclo[33.3.1]nonatriaconta-4,6,8,10 Chemical compound C1C=C2C[C@@H](OS(O)(=O)=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2.O[C@H]1[C@@H](N)[C@H](O)[C@@H](C)O[C@H]1O[C@H]1/C=C/C=C/C=C/C=C/C=C/C=C/C=C/[C@H](C)[C@@H](O)[C@@H](C)[C@H](C)OC(=O)C[C@H](O)C[C@H](O)CC[C@@H](O)[C@H](O)C[C@H](O)C[C@](O)(C[C@H](O)[C@H]2C(O)=O)O[C@H]2C1 PCTMTFRHKVHKIS-BMFZQQSSSA-N 0.000 description 6
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
本申请公开了一种校验靶、基于校验靶的K&C试验方法，涉及K&C试验技术领域，包括利用校验靶，对K&C试验台的四个角平台外侧的轮心位移传感器分别进行初始值设定。将车辆的四个车轮分别放置与K&C试验台的四个角平台上表面，将每个轮心位移传感器的连结盘均与相应轮胎的轮毂连接后，进行K&C试验，通过轮心位移传感器得到相应轮胎的前束角的绝对值和变化值、以及外倾角的绝对值和变化值。本申请通过将校验靶安装于K&C试验的角平台上表面，利用校验靶中圆形板与竖直面之间的不同角度来对角平台外侧的轮心位移传感的前束角和外倾角初始绝对值进行设定，从而能够通过K&C试验台获取前束角和外倾角的绝对值和变化值，实现不同试验设备和方法的坐标系统一。
The present application discloses a calibration target and a K&C test method based on the calibration target, and relates to the technical field of K&C test, including using the calibration target to set the initial values of the wheel center displacement sensors on the outer sides of the four corner platforms of the K&C test bench. The four wheels of the vehicle are placed on the upper surfaces of the four corner platforms of the K&C test bench respectively, and the connecting plates of each wheel center displacement sensor are connected to the wheel hubs of the corresponding tires, and then the K&C test is performed, and the absolute value and change value of the toe angle of the corresponding tire, as well as the absolute value and change value of the camber angle are obtained through the wheel center displacement sensor. The present application sets the initial absolute values of the toe angle and camber angle of the wheel center displacement sensor on the outer side of the corner platform by installing the calibration target on the upper surface of the corner platform of the K&C test, and using the different angles between the circular plate in the calibration target and the vertical surface, so that the absolute value and change value of the toe angle and camber angle can be obtained through the K&C test bench, and the coordinate system of different test equipment and methods is realized.
Description
Technical Field
The application relates to the technical field of K & C tests, in particular to a verification target and a K & C test method based on the verification target.
Background
We look at the vehicle from the front or back of the vehicle, the wheels are not necessarily perfectly perpendicular to the ground, but form a slight angle with the ground, which is the Camber angle (Camber) of the wheels, which is generally not noticeable unless viewed with mind. Looking from the front (back) direction, the two wheels are in a positive splayed shape (also called as an external splayed shape), are set with a negative inclination angle, the two wheels are completely vertical to the ground and have a 0 inclination angle, and are in an inverted splayed shape (also called as an internal splayed shape), and are in a positive inclination angle.
A typical Front-end-gine Front-drive (FF) vehicle has Front wheels with a 0-pitch angle or slightly positive pitch angle and rear wheels with a negative pitch angle to some extent. Under the condition of load, the front wheel can form an ideal linear walking state with a 0-degree dip angle due to the dip angle Gain (cam Gain). In the state of 0 degree dip angle, the contact area between the tire and the ground reaches the maximum, and the acceleration and braking performance is also optimal. The front-mounted front-drive vehicle type rear wheel is light in weight, meanwhile, the front-mounted front-drive vehicle type rear wheel is not responsible for driving the vehicle, the burden of braking is relatively light, the ground contact area of the tire in the curve can be increased by setting the negative inclination angle to a certain extent, the over-curve stability is enhanced, and the degree of inner side eccentric wear caused by the negative inclination angle is quite slight.
Turning to a high performance rear wheel drive or four-wheel drive vehicle type, it is evident that the four wheels all have a degree of negative camber, with the objective being quite apparent, also to increase the ground contact surface and stability during aggressive maneuvers.
The automobile is preferably near 0 camber angle when traveling straight, and the automobile is more preferably at a negative camber angle when turning to help over-bend. So that the special design of the tilt angle gain is suspended in the automobile. Meaning that the wheel is not fully vertically moving upward when subjected to pressure, but the more upward the wheel moves, the greater the negative camber angle. In the first-class formula racing car of the world top, the front wheel is set with obvious negative inclination angles for coping with rapid and violent curves, and the inclination angles of the rear wheel are not obvious because the rear wheel is a driving wheel. Moreover, the set angle of the racing car is related to the type of the track curve and the proportion of the curve.
In addition, when the vehicle is viewed from above directly above, the four wheels are not intended to be positioned exactly parallel to one another, but are arranged with a slight angle between the front wheels or between the rear wheels. But the included angle is very small and is basically indistinguishable to the naked eye. The function of the toe angle is to compensate the tendency of the tire to roll inwards or outwards due to camber angle and road resistance, ensure the straightness of the vehicle and avoid uneven tire consumption.
The Toe angle (Toe In) is set at a smaller Toe angle between the wheels than the rear. Toe, can symbolize the person's splayfoot. Conversely, the Toe angle (Toe Out) is set with a larger forward distance than rearward distance between the wheels, similar to a person's splayed foot.
Four-wheel positioning parameters of the automobile, such as toe angle, camber angle and the like, directly affect the riding comfort and the operation stability of the automobile. The main four-wheel aligner and K & C test stand (static K & C) test equipment and method are involved in testing the index.
Four wheel alignment measures the absolute value of toe angle and camber angle of a vehicle at a certain static attitude (load). The K & C test performed on the K & C test bed measures the change values of the toe angle and the camber angle of the vehicle in the continuously changing posture (load), which cannot measure the absolute values of the toe angle and the camber angle.
The standards of the two test data are different, and how to unify the data of the whole flow of simulation, design and test based on the same coordinate system is a technical problem which needs to be solved at present and is convenient for upstream and downstream users to read and compare.
Disclosure of Invention
Aiming at the defects in the prior art, the application aims to provide a calibration target and a K & C test method based on the calibration target, wherein different angles between a circular plate and a vertical surface in the calibration target are utilized to set the initial absolute values of the toe angle and the camber angle of the wheel center displacement sensing outside the diagonal platform, so that the absolute values and the variation values of the toe angle and the camber angle can be obtained through a K & C test bench, and the coordinate systems of different test equipment and methods are realized.
In order to achieve the above purpose, the technical scheme adopted is as follows:
a first aspect of the present application provides a verification target comprising:
The verification target is characterized by comprising a target seat and an inserting rod;
The target seat comprises a bottom panel and a vertical panel which are mutually perpendicular, the joint edge of the bottom panel and the vertical panel is a joint edge, a plurality of first mounting holes and a plurality of first plug holes are formed in the bottom panel, and a plurality of second plug holes are formed in the vertical panel;
The inserted link includes the pole setting, and the pole setting top is equipped with the circular plate, and the pole setting bottom is equipped with a plurality of round pins pole, the size of round pins pole respectively with first spliced eye with the second spliced eye matches.
In some embodiments, the corner platform upper surfaces of the K & C test stand are all square;
The bottom panel with the facade panel is the rectangular plate, the length of joint limit is the twice of the length of limit of angle platform upper surface, the bottom panel with the length of all sides that the vertical panel is perpendicular with the joint limit equals with the length of limit of angle platform upper surface.
In some embodiments, the plurality of first mounting holes are formed on one side of the bottom panel, the plurality of first plugging holes are formed on the other side of the bottom panel, the side edge, which is perpendicular to the connecting edge and adjacent to the plurality of first mounting holes, of the bottom panel is a first outer side edge, and the side edge, which is perpendicular to the connecting edge and adjacent to the plurality of first plugging holes, of the bottom panel is a first inner side edge;
The side edge of the vertical panel, which is perpendicular to the connecting edge and is connected with the first outer side edge, is a second outer side edge, the side edge of the vertical panel, which is perpendicular to the connecting edge and is connected with the first inner side edge, is a second inner side edge, and one side, close to the first inner side edge, of the vertical panel is provided with a plurality of second plug holes.
In some embodiments, the plurality of first jack holes include a first hole, a second hole, a third hole, a fourth hole, a fifth hole, a sixth hole, and a seventh hole, and the first hole, the second hole, the third hole, the fourth hole, the fifth hole, and the sixth hole are all located on a circle with the seventh hole as a center and a radius of 5 cm;
the seventh hole is positioned at the center of a line segment which is parallel to the first outer side edge and is 10cm away from the first outer side edge;
the included angle between the connecting line of the first hole and the seventh hole and the first outer side edge is 15 degrees;
the included angle between the connecting line of the second hole and the seventh hole and the first outer side edge is 60 degrees;
The included angle between the connecting line of the third hole and the seventh hole and the first outer side edge is 75 degrees;
The included angle between the connecting line of the fourth hole and the seventh hole and the first outer side edge is 105 degrees;
the included angle between the connecting line of the fifth hole and the seventh hole and the first outer side edge is 120 degrees;
the included angle between the connecting line of the sixth hole and the seventh hole and the first outer side edge is 165 degrees.
In some embodiments, the plurality of second jack holes include an eighth hole, a ninth hole, a tenth hole, an eleventh hole, a twelfth hole, a thirteenth hole, and a fourteenth hole, and the eighth hole, the ninth hole, the tenth hole, the eleventh hole, the twelfth hole, and the thirteenth hole are all located on a circle with a radius of 5cm and a center of the tenth hole;
A tenth four-hole is parallel to the second outer side edge and is separated from the center of the line segment by 10 cm;
The included angle between the connecting line of the eighth hole and the tenth hole and the first outer side edge is 15 degrees;
The included angle between the connecting line of the ninth hole and the tenth hole and the first outer side edge is 60 degrees;
the included angle between the connecting line of the tenth hole and the tenth four holes and the first outer side edge is 75 degrees;
the included angle between the connecting line of the eleventh hole and the tenth hole and the first outer side edge is 105 degrees;
the included angle between the connecting line of the twelfth hole and the tenth hole and the first outer side edge is 120 degrees;
the connecting line of the thirteenth hole and the tenth hole has an included angle of 165 degrees with the first outer side edge.
In some embodiments, the plurality of pin bars includes a first bar, a second bar, and a third bar, the first bar being coaxial with the upright, the first bar, the second bar, and the third bar being in a regular triangle;
the connecting line of the second rod and the third rod is parallel to the circular plate.
In some embodiments, the length of the upright is 50cm, the length of the pin is 1cm, the distance between two adjacent pins is 5cm, and the radius of the circular plate is 10cm.
A K & C test method based on a calibration target, comprising:
Respectively setting initial values of wheel center displacement sensors at the outer sides of four corner platforms of the K & C test stand by using a verification target, wherein the initial values comprise a toe-in value and an camber value;
the verification target is removed from the K & C test bed, four wheels of a vehicle are respectively placed on the upper surfaces of four corner platforms of the K & C test bed, after connecting the connecting disc of each wheel center displacement sensor with the hub of the corresponding tire, K & C test is carried out, and the absolute value and the change value of the toe-in angle and the absolute value and the change value of the camber angle of the corresponding tire are obtained through the wheel center displacement sensor;
each initial value setting includes:
Mounting a bottom panel of the verification target on the upper surface of the corner platform through the plurality of first mounting holes;
The angle of the circular plate is adjusted by inserting a plurality of pin rods of the inserted rod into a plurality of first inserting holes of the bottom panel, and a connecting disc of a wheel center displacement sensor of the K & C test stand is arranged on the circular plate every time the angle of the circular plate is adjusted so as to set the toe-in value of the wheel center displacement sensor according to the angle of the circular plate;
The angles of the circular plates are adjusted by inserting the plurality of pin rods of the inserted rods into the plurality of second inserting holes of the vertical plate, and the connecting discs of the wheel center displacement sensor of the K & C test stand are arranged on the circular plates every time the angles of the circular plates are adjusted so as to set the camber values of the wheel center displacement sensor according to the angles of the circular plates.
In some embodiments, when the initial value of the toe-in value of each wheel center displacement sensor is set, the toe-in value of the wheel center displacement sensor is set by using the included angle between the circular plate and the vertical surface;
When the initial value of the toe-in value of each wheel center displacement sensor is set, the included angle between the circular plate and the vertical surface is used as the camber value of the wheel center displacement sensor.
In some embodiments, when the initial value of the toe-in value of each wheel center displacement sensor is set, the angle of the circular plate is adjusted at least twice to set two different toe-in values of the wheel center displacement sensor according to two different angles of the circular plate;
when the camber value of each wheel center displacement sensor is set to be an initial value, the angle of the circular plate is adjusted at least twice, so that two different camber values of the wheel center displacement sensors are set according to two different angles of the circular plate.
The technical scheme provided by the application has the beneficial effects that the calibration target is arranged on the upper surface of the angle platform for K & C test, and different angles between the circular plate and the vertical surface in the calibration target are utilized to set the initial absolute values of the toe angle and the camber angle of the wheel center displacement sensor at the outer side of the angle platform, so that the absolute values and the variation values of the toe angle and the camber angle can be obtained through the K & C test bed, and the coordinate system unification of different test equipment and methods is realized.
Drawings
Fig. 1 is a toe angle change curve of a vehicle under a continuously changing posture (load) acquired by a K & C test stand in the prior art.
Fig. 2 is a schematic structural diagram of a backing plate according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of a bottom plate of a backing plate in an embodiment of the invention.
Fig. 4 is a schematic structural view of a plunger according to an embodiment of the present invention.
Fig. 5 is a schematic flow chart of setting an initial value of a wheel center displacement sensor according to an embodiment of the present invention.
Reference numerals:
1-first hole, 2-second hole, 3-third hole, 4-fourth hole, 5-fifth hole, 6-sixth hole, 7-seventh hole, 8-eighth hole, 9-ninth hole, 10-tenth hole, 11-eleventh hole, 12-twelfth hole, 13-thirteenth hole, 14-tenth hole, 15-target seat, 16-insert rod, 17-bottom plate, 18-vertical plate, 19-vertical rod, 20-circular plate, 21-first rod, 22-second rod, 23-third rod.
Detailed Description
The present application will be described in further detail with reference to the accompanying drawings and examples.
K & C is the abbreviation of KINEMATICS & company, which refers to rigid body kinematics and elastic kinematics of the automobile suspension. The K & C tire coupling test is to apply force and displacement in known directions to a vehicle suspension through a K & C test bed, and to measure the relationship between the force and displacement of the center of the wheel and the ground contact point of the tire. The hardware of the K & C test bed mainly comprises four parts, namely a test bed base, a car body fixing module, a loading module, a measurement and control system and a user interaction interface. The base provides rigidity support, also makes things convenient for platform module adjustment and alignment to adapt to the vehicle test of different wheelbase and wheel base simultaneously, includes four angle platforms. The vehicle body fixing device helps to be completely fixed with the base in a test, and has various clamping fixing mechanisms such as hydraulic, electromagnetic, mechanical and the like. The loading module mainly applies displacement and force to wheels and comprises a loading platform and a power source. The measurement and control system mainly controls the movement of the wheels and obtains data, the obtained data is stored or output to the upper computer after corresponding conversion treatment, the measurement and control system comprises a wheel center displacement sensor which is arranged on the outer side of the angle platform and used for measuring the toe angle and the camber angle of the wheels, the wheel center displacement sensor comprises a mechanical arm, a connecting disc connected with the mechanical arm and a plurality of sensors which are arranged at the junction of the mechanical arm and the connecting disc, and the plurality of sensors can measure the toe angle change value and the camber angle change value of the tires during K & C tests. The user interaction interface is mainly used for providing users with control of test operation through various switch control buttons and control screens, and can observe the operation condition of all main equipment.
As shown in fig. 1, in the prior art, when a K & C test is performed based on the K & C test, a toe-in angle change curve of a vehicle under a continuously changing posture (load) is acquired by a certain wheel center displacement sensor, wherein an X axis is a distance or a displacement value of a wheel moving up and down in the figure, and a Y axis is a toe-in angle change amount. The wheel center displacement sensor in the current K & C test bed cannot measure the absolute values of toe angle and camber angle of the vehicle under a certain static attitude (load), i.e. cannot know what the initial value of the Y axis in fig. 1 is. Before the vehicle is tested in K & C, four-wheel positioning is needed. Four wheel alignment measures the absolute value of toe angle and camber angle of a vehicle at a certain static attitude (load). In other words, since the four-wheel alignment cannot measure the trend of the toe angle and camber angle of the vehicle in a continuously varying posture (load) (since the four-wheel alignment apparatus cannot apply forces in the vertical and horizontal directions to the wheels of the vehicle like the K & C test stand, so that the wheels are varied, and thus the value of the toe angle and camber angle is measured), the K & C test is required.
For the above reasons, the current toe-in angle and camber angle test needs to utilize two sets of equipment of a four-wheel positioning table and a K & C test table, and combine the test results of the two equipment, and manually convert the data based on different time and angle coordinate systems into the same coordinate system for analysis of the test results.
And if the K & C test bed can continuously measure the toe angle and the camber angle absolute value of the vehicle. Then, in fig. 1, the value of the ordinate Y axis is a true value, and meanwhile, the change trend can be reflected, so that the research and development technician is more visual and convenient, the research and development technician does not need to combine and see the data of the four-wheel positioning test when looking at the K & C test data, and the abnormal data can be found timely, and the search reasons can be analyzed timely.
As shown in fig. 2 to 4, an embodiment of the present invention provides a verification target including a backing plate 15 and a plunger 16.
The target seat 15 comprises a bottom plate 17 and a vertical plate 18 which are mutually perpendicular, the joint edge of the bottom plate 17 and the vertical plate 18 is a joint edge, a plurality of first mounting holes and a plurality of first plug holes are formed in the bottom plate 17, and a plurality of second plug holes are formed in the vertical plate 18;
the inserted link 16 includes pole setting 19, and pole setting 19 top is equipped with circular plate 20, and pole setting 19 bottom is equipped with a plurality of round pins pole, the size of round pin pole respectively with first spliced eye with the second spliced eye matches.
In this embodiment, the distribution positions of the plurality of first jack holes on the bottom panel 17 are the same as the distribution positions of the plurality of second jack holes on the elevation panel 18. The plurality of pins at the bottom of the insert rod 16 are inserted into different first inserting holes in the bottom panel 17, so that the circular plate 20 at the top of the insert rod 16 can have different deflection angles, and the deflection angle of the circular plate 20 can be obtained according to the structures of the target seat 15 and the insert rod 16.
The plurality of pins at the bottom of the insert rod 16 are inserted into different first inserting holes in the vertical plate 18, so that the circular plate 20 at the top of the insert rod 16 can have different deflection angles, and the deflection angle of the circular plate 20 can be obtained according to the structures of the target seat 15 and the insert rod 16.
In a preferred embodiment, the corner platform upper surfaces of the K & C test stand are square. The upper surface of the corner platform is horizontally arranged.
The bottom plate 17 and the elevation plate 18 are rectangular plates, the length of the joint edge is twice the side length of the upper surface of the angle platform, and the lengths of all sides of the bottom plate 17 and the elevation plate 18 perpendicular to the joint edge are equal to the side length of the upper surface of the angle platform.
In this embodiment, the bottom panel 17 is a rectangular ABCD in fig. 2, the elevation panel 18 is a CDEF in fig. 3, and the intersecting sides are sides CD. Taking a square with an angle platform of about 50cm as an example, the length of the side CD of the backing plate 15 is about 100cm and the length of the side AB is about 50 cm.
In a preferred embodiment, the plurality of first mounting holes (all the holes except the first hole 11-the seventh hole 77 in the bottom plate 17 are first mounting holes) are formed on one side of the bottom plate 17, the plurality of first plugging holes are formed on the other side, the side, perpendicular to the junction edge, of the bottom plate 17 adjacent to the plurality of first mounting holes is a first outer side, and the side, perpendicular to the junction edge, of the bottom plate 17 adjacent to the plurality of first plugging holes is a first inner side.
The side edge of the vertical plate 18 perpendicular to the connecting edge and connected to the first outer side edge is a second outer side edge, the side edge of the vertical plate 18 perpendicular to the connecting edge and connected to the first inner side edge is a second inner side edge, and the side of the vertical plate 18 close to the first inner side edge is provided with the plurality of second plug holes.
In this embodiment, the first outer side is the side AD, the first inner side is the side BC, the second outer side is the side DE, and the second outer side is the side CF.
In a preferred embodiment, the plurality of first plugging holes include a first hole 1, a second hole 2, a third hole 3, a fourth hole 4, a fifth hole 5, a sixth hole 6 and a seventh hole 7, and the first hole 1, the second hole 2, the third hole 3, the fourth hole 4, the fifth hole 5 and the sixth hole 6 are all located on a circle with the seventh hole 7 as a center and a radius of 5 cm.
The seventh hole 7 is located in the centre of a line segment parallel to the first outer side and at a distance of 10 cm.
The angle between the line connecting the first hole 1 and the seventh hole 7 and the first outer side edge is 15 degrees.
The angle between the connecting line of the second hole 2 and the seventh hole 7 and the first outer side edge is 60 degrees.
The angle between the line connecting the third hole 3 and the seventh hole 7 and the first outer side edge is 75 degrees.
The angle between the line connecting the fourth hole 4 and the seventh hole 7 and the first outer side edge is 105 degrees.
The angle between the line connecting the fifth hole 5 and the seventh hole 7 and the first outer side edge is 120 degrees.
The angle between the connecting line of the sixth hole 6 and the seventh hole 7 and the first outer side edge is 165 degrees.
In a preferred embodiment, the plurality of second plugging holes include an eighth hole 8, a ninth hole 9, a tenth hole 10, an eleventh hole 11, a twelfth hole 12, a thirteenth hole 13, and a tenth hole 14, and the eighth hole 8, the ninth hole 9, the tenth hole 10, the eleventh hole 11, the twelfth hole 12, and the thirteenth hole 13 are all located on a circle with the fourteenth hole 14 as a center and a radius of 5 cm.
The tenth four holes 14 are parallel to the second outer side and are spaced 10cm apart from the center of the line segment.
The line connecting the eighth aperture 8 and the tenth aperture 14 forms an angle of 15 ° with the first outer side.
The line connecting the ninth hole 9 and the fourteenth hole 14 forms an angle of 60 ° with the first outer side edge.
The line connecting the tenth aperture 10 and the fourteenth aperture 14 is at an angle of 75 ° to the first outer side edge.
The line connecting the eleventh hole 11 and the fourteenth hole 14 forms an angle of 105 deg. with the first outer side edge.
The line connecting the twelfth aperture 12 and the fourteenth aperture 14 is at an angle of 120 ° to the first outer side edge.
The line connecting the thirteenth aperture 13 and the fourteenth aperture 14 is at an angle of 165 ° to the first outer side edge.
In a preferred embodiment, the plurality of pin bars includes a first bar 21, a second bar 22 and a third bar 23, the first bar 21 being coaxial with the upright 19, the first bar 21, the second bar 22 and the third bar 23 being distributed in a regular triangle.
The line connecting the second rod 22 and the third rod 23 is parallel to the circular plate 20.
In this embodiment, the second rod 22 and the third rod 23 each comprise an inclined portion and a vertical portion, the vertical portion being parallel to the upright 19, the inclined portion being at an angle to the upright 19.
In a preferred embodiment, the length of the upright 19 is 50cm, the length of the pin is 1cm, the distance between two adjacent pins is 5cm, and the radius of the circular plate 20 is 10cm.
The embodiment of the invention also provides a K & C test method based on the verification target, which comprises the following steps:
And respectively setting initial values of wheel center displacement sensors at the outer sides of the four corner platforms of the K & C test stand by using a verification target, wherein the initial values comprise a toe-in value and a camber value.
And (3) detaching the verification target from the K & C test bed, respectively placing four wheels of the vehicle on the upper surfaces of four corner platforms of the K & C test bed, connecting the connecting disc of each wheel center displacement sensor with the hub of the corresponding tire, and then performing K & C test to obtain the absolute value and the change value of the toe-in angle and the absolute value and the change value of the camber angle of the corresponding tire through the wheel center displacement sensor.
As shown in fig. 5, each initial value setting includes:
step S1, mounting a bottom plate 17 of the verification target on the upper surface of the corner platform through the plurality of first mounting holes.
Step S2, the angles of the circular plates 20 are adjusted by inserting the pins of the insert rods 16 into the first insert holes of the bottom plate 17, and each time the angles of the circular plates 20 are adjusted, the connecting disc of the wheel center displacement sensor of the K & C test stand is mounted on the circular plates 20 to set the toe-in value of the wheel center displacement sensor according to the angles of the circular plates 20.
Step S3, a plurality of pins of the insert rod 16 are inserted into a plurality of second inserting holes of the vertical plate 18, the angle of the circular plate 20 is adjusted, and each time the angle of the circular plate 20 is adjusted, a connecting disc of the wheel center displacement sensor of the K & C test stand is mounted on the circular plate 20, so as to set the camber value of the wheel center displacement sensor according to the angle of the circular plate 20.
Further, when the initial value of the toe-in value of each wheel center displacement sensor is set, the included angle between the circular plate 20 and the vertical surface is used as the toe-in value of the wheel center displacement sensor.
When the initial value of the toe-in value of each wheel center displacement sensor is set, the included angle between the circular plate 20 and the vertical surface is taken as the camber value of the wheel center displacement sensor.
Further, when the initial value of the toe-in value of each wheel center displacement sensor is set, the angle of the circular plate 20 is adjusted at least twice to set two different toe-in values of the wheel center displacement sensor according to two different angles of the circular plate 20.
When the camber value of each wheel center displacement sensor is set as an initial value, the angle of the circular plate 20 is adjusted at least twice to set two different camber values of the wheel center displacement sensor according to two different angles of the circular plate 20.
In this embodiment, the verification target holder 15 is first manufactured, specifically, a rectangular iron plate ABCD is manufactured, a rectangular iron plate CDEF is connected above the edge CD of the rectangular iron plate, the rectangular iron plate ABCD is perpendicular to the rectangular iron plate CDEF, the rectangular iron plate ABCD is used as the bottom plate 17 in the target holder 15 of the verification target, and the rectangular iron plate CDEF is used as the vertical plate 18 in the target holder 15 of the verification target.
For convenience of explanation, the side AD is positive in X-axis, the side BA is positive in Y-axis, and the vertical horizontal plane ABCD is positive in upper Z-axis.
Then, a checking inserted rod 16 of the checking target is manufactured, a vertical rod 19 with the height of 50 cm is manufactured, and three pin rods distributed in a regular triangle are arranged at the lower end of the vertical rod 19. Three pin bars form a regular triangle HIJ, wherein the first bar 21 is coaxial with the upright 19, the side length of the regular triangle HIJ is 5cm, the diameter of the pin bar is 6cm, and the length of the vertical part in the pin bar is not less than 1cm. The upper end of the upright 19 is provided with a circular plate 20P with a diameter of 20 cm. The holes and dimensions of the circular plate 20 are adapted to the coupling discs to allow the coupling discs of the wheel center displacement sensor to be mounted on the circular plate 20P.
A seventh hole 7 is defined at a center position of the side BC and at a distance of 10cm from the side BC, and the first hole 1, the second hole 2, the third hole 3, the fourth hole 4, the fifth hole 5 and the sixth hole 6 are defined on a circle having a radius of 5cm with the seventh hole 7 as a dot.
Taking the initial value setting of the toe-in angle of the wheel center displacement sensor at the left front wheel of the vehicle as an example, the bottom plate 17 is placed on the upper surface of the corner platform, a coupling disc is mounted on the circular plate 20 on the side away from the second lever 22 and the third lever 23, and the wheel center displacement sensor is mounted through the coupling disc.
When the first rod 21 of the upright 19 is inserted into the seventh hole 7, the third rod 23 is inserted into the fifth hole 5, the second rod 22 is inserted into the second hole 2, and the plane of the circular plate 20 is parallel to the ZX plane, the toe-in value of the connecting disc of the wheel center displacement sensor should be 0 after the connecting disc is mounted on the circular plate 20. The toe value of the wheel center displacement sensor at this time is changed to 0 in the system.
When the first rod 21 of the upright 19 is inserted into the seventh hole 7, the third rod 23 is inserted into the third hole 3, and the second rod 22 is inserted into the first hole 1, the plane of the circular plate 20 forms an angle of 45 degrees with the ZX plane, and at this time, the toe-in value of the connecting disc of the wheel center displacement sensor should be 45 degrees after the connecting disc is mounted on the circular plate 20. The toe value of the wheel center displacement sensor at this time is changed to 45 deg. in the system.
When the first rod 21 of the upright 19 is inserted into the seventh hole 7, the third rod 23 is inserted into the sixth hole 6, and the second rod 22 is inserted into the fourth hole 4, the plane of the circular plate 20 forms an angle of 135 degrees with the ZX plane, and at this time, the toe-in value of the coupling disc of the wheel center displacement sensor should be-45 degrees (according to the toe-in definition) after the coupling disc is mounted on the circular plate 20. The toe value of the wheel center displacement sensor at this time is changed to-45 deg. in the system.
Thus, the toe-in calibration of the wheel center displacement sensor at the left front wheel of the vehicle is completed. The toe-in calibration of the other wheel center displacement sensors is similar to the wheel center displacement sensor calibration at the left front wheel.
The camber is then calibrated. The camber target hole is the second plug hole on the CDEF plane perpendicular to the ABCD.
Similar to the calibration of the toe angle, on the vertical surface plate 18, the tenth four holes 14 are base holes, and the eighth holes 8, the ninth holes 9, the tenth holes 10, the eleventh holes 11, the twelfth holes 12 and the thirteenth holes 13 are distributed on a circle with a radius of 5cm and the tenth four holes 14 as the circle center.
When the first rod 21 of the upright 19 is inserted into the tenth hole 14, the third rod 23 is inserted into the twelfth hole 12, the second rod 22 is inserted into the ninth hole 9, and the plane of the circular plate 20 is parallel to the ZX plane, the camber value of the coupling disc of the wheel center displacement sensor should be 0 after the coupling disc is mounted on the circular plate 20. The camber value of the wheel center displacement sensor at this time is changed to 0 in the system.
When the first rod 21 of the upright 19 is inserted into the tenth hole 14, the third rod 23 is inserted into the tenth hole 10, and the second rod 22 is inserted into the eighth hole 8, the plane of the circular plate 20 forms an angle of 45 ° with the ZX plane, and at this time, the camber value of the coupling disc of the wheel center displacement sensor should be 45 ° after the coupling disc is mounted on the circular plate 20. The camber value of the wheel center displacement sensor at this time is changed to 45 deg. in the system.
When the first rod 21 of the upright 19 is inserted into the tenth and fourth holes 14, the third rod 23 is inserted into the thirteenth hole 13, and the second rod 22 is inserted into the eleventh hole 11, the plane of the circular plate 20 forms an angle of 135 ° with the ZX plane, and the camber value of the connecting disc of the wheel center displacement sensor should be-45 ° (defined by camber) after the connecting disc is mounted on the circular plate 20. The camber value of the wheel center displacement sensor at this time is changed to-45 deg. in the system.
The camber calibration of the wheel center displacement sensor at the left front wheel of the vehicle is finished. The camber calibration of the other wheel center displacement sensors is similar to the wheel center displacement sensor calibration at the left front wheel.
In summary, since the absolute initial values of the foregoing and camber of the wheel center displacement sensor have been found and given, unification of the coordinate system of the four-wheel alignment measurement data and the K & C test data is completed. The data unification of the whole flow of simulation, design and test (different tests) is realized, and the reading and comparison of upstream and downstream are convenient. Because a test such as a K & C test can be checked (calibrated) by other test equipment, visual data (e.g., K & C test data, absolute values can be read in time, and the range of values is wide) can be obtained in time when testing is facilitated. The abnormal data can be found out in time, and the reasons can be analyzed and found out.
The application is not limited to the embodiments described above, but a number of modifications and adaptations can be made by a person skilled in the art without departing from the principle of the application, which modifications and adaptations are also considered to be within the scope of the application.
Claims (10)
1. The verification target is characterized by comprising a target seat and an inserting rod;
The target seat comprises a bottom panel and a vertical panel which are mutually perpendicular, the joint edge of the bottom panel and the vertical panel is a joint edge, a plurality of first mounting holes and a plurality of first plug holes are formed in the bottom panel, and a plurality of second plug holes are formed in the vertical panel;
the inserted link includes the pole setting, and the pole setting top is equipped with the circular plate, the wheel center displacement sensor of circular plate installation K & C test bench, the pole setting bottom is equipped with a plurality of round pins, the size of round pin pole respectively with first spliced eye with the second spliced eye matches.
2. The verification target of claim 1, wherein the corner platform upper surfaces of the K & C test stand are all square;
The bottom panel with the facade panel is the rectangular plate, the length of joint limit is the twice of the length of limit of angle platform upper surface, the bottom panel with the length of all sides that the vertical panel is perpendicular with the joint limit equals with the length of limit of angle platform upper surface.
3. The verification target of claim 1, wherein one side of the bottom panel is provided with the plurality of first mounting holes, the other side of the bottom panel is provided with the plurality of first plugging holes, the side of the bottom panel perpendicular to the junction edge and adjacent to the plurality of first mounting holes is a first outer side, and the side of the bottom panel perpendicular to the junction edge and adjacent to the plurality of first plugging holes is a first inner side;
The side edge of the vertical panel, which is perpendicular to the connecting edge and is connected with the first outer side edge, is a second outer side edge, the side edge of the vertical panel, which is perpendicular to the connecting edge and is connected with the first inner side edge, is a second inner side edge, and one side, close to the first inner side edge, of the vertical panel is provided with a plurality of second plug holes.
4. The verification target of claim 3, wherein the plurality of first plug holes comprises a first hole, a second hole, a third hole, a fourth hole, a fifth hole, a sixth hole, and a seventh hole, each of the first hole, the second hole, the third hole, the fourth hole, the fifth hole, and the sixth hole being located on a circle centered on the seventh hole and having a radius of 5 cm;
the seventh hole is positioned at the center of a line segment which is parallel to the first outer side edge and is 10cm away from the first outer side edge;
the included angle between the connecting line of the first hole and the seventh hole and the first outer side edge is 15 degrees;
the included angle between the connecting line of the second hole and the seventh hole and the first outer side edge is 60 degrees;
The included angle between the connecting line of the third hole and the seventh hole and the first outer side edge is 75 degrees;
The included angle between the connecting line of the fourth hole and the seventh hole and the first outer side edge is 105 degrees;
the included angle between the connecting line of the fifth hole and the seventh hole and the first outer side edge is 120 degrees;
the included angle between the connecting line of the sixth hole and the seventh hole and the first outer side edge is 165 degrees.
5. The verification target of claim 3, wherein the plurality of second mating holes includes an eighth hole, a ninth hole, a tenth hole, an eleventh hole, a twelfth hole, a thirteenth hole, and a fourteenth hole, each of the eighth hole, the ninth hole, the tenth hole, the eleventh hole, the twelfth hole, and the thirteenth hole being located on a circle centered on the tenth fourth hole and having a radius of 5 cm;
A tenth four-hole is parallel to the second outer side edge and is separated from the center of the line segment by 10 cm;
The included angle between the connecting line of the eighth hole and the tenth hole and the first outer side edge is 15 degrees;
The included angle between the connecting line of the ninth hole and the tenth hole and the first outer side edge is 60 degrees;
the included angle between the connecting line of the tenth hole and the tenth four holes and the first outer side edge is 75 degrees;
the included angle between the connecting line of the eleventh hole and the tenth hole and the first outer side edge is 105 degrees;
the included angle between the connecting line of the twelfth hole and the tenth hole and the first outer side edge is 120 degrees;
the connecting line of the thirteenth hole and the tenth hole has an included angle of 165 degrees with the first outer side edge.
6. The verification target of claim 3, wherein the plurality of pins comprises a first rod, a second rod, and a third rod, the first rod being coaxial with the upright, the first rod, the second rod, and the third rod being in a regular triangle;
the connecting line of the second rod and the third rod is parallel to the circular plate.
7. The verification target of claim 6, wherein said uprights are 50cm in length, said pins are 1cm in length, the distance between two adjacent pins is 5cm, and the radius of said circular plate is 10cm.
8. A K & C test method based on a calibration target, characterized in that it is based on a calibration target according to any one of claims 1-7, comprising:
Respectively setting initial values of wheel center displacement sensors at the outer sides of four corner platforms of the K & C test stand by using a verification target, wherein the initial values comprise a toe-in value and an camber value;
the verification target is removed from the K & C test bed, four wheels of a vehicle are respectively placed on the upper surfaces of four corner platforms of the K & C test bed, after connecting the connecting disc of each wheel center displacement sensor with the hub of the corresponding tire, K & C test is carried out, and the absolute value and the change value of the toe-in angle and the absolute value and the change value of the camber angle of the corresponding tire are obtained through the wheel center displacement sensor;
each initial value setting includes:
Mounting a bottom panel of the verification target on the upper surface of the corner platform through the plurality of first mounting holes;
The angle of the circular plate is adjusted by inserting a plurality of pin rods of the inserted rod into a plurality of first inserting holes of the bottom panel, and a connecting disc of a wheel center displacement sensor of the K & C test stand is arranged on the circular plate every time the angle of the circular plate is adjusted so as to set the toe-in value of the wheel center displacement sensor according to the angle of the circular plate;
The angles of the circular plates are adjusted by inserting the plurality of pin rods of the inserted rods into the plurality of second inserting holes of the vertical plate, and the connecting discs of the wheel center displacement sensor of the K & C test stand are arranged on the circular plates every time the angles of the circular plates are adjusted so as to set the camber values of the wheel center displacement sensor according to the angles of the circular plates.
9. The K & C test method based on the calibration target according to claim 8, wherein when the initial value of the toe-in value of each of the wheel center displacement sensors is set, the toe-in value of the wheel center displacement sensor is set by using the angle between the circular plate and the vertical plane;
When the initial value of the toe-in value of each wheel center displacement sensor is set, the included angle between the circular plate and the vertical surface is used as the camber value of the wheel center displacement sensor.
10. The K & C test method based on a calibration target according to claim 8, wherein when the initial value of the toe-in value of each of the wheel center displacement sensors is set, two different toe-in values of the wheel center displacement sensors are set according to two different angles of the circular plate by adjusting the angle of the circular plate at least twice;
when the camber value of each wheel center displacement sensor is set to be an initial value, the angle of the circular plate is adjusted at least twice, so that two different camber values of the wheel center displacement sensors are set according to two different angles of the circular plate.
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| CN203069386U (en) * | 2013-01-15 | 2013-07-17 | 同济大学 | Double wishbone suspension wheel location parameter measuring apparatus |
| CN105910834A (en) * | 2016-06-14 | 2016-08-31 | 华晨汽车集团控股有限公司 | Automobile four-wheel positioning detection device and method |
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| GB732586A (en) * | 1953-02-05 | 1955-06-29 | Edward David Wilkerson | Improvements in or relating to methods and apparatus for testing vehicle wheel alignment |
| US4457075A (en) * | 1980-12-15 | 1984-07-03 | Toyota Jidosha Kogyo Kabushiki Kaisha | Method and an apparatus for measuring wheel alignment of motor vehicles |
| DE59304664D1 (en) * | 1992-10-16 | 1997-01-16 | Schenck Komeg Gmbh | Device for calibrating measuring units for tracking, camber and dachshund running measurement on motor vehicle wheels in a chassis position |
| JPH08261747A (en) * | 1995-03-23 | 1996-10-11 | Nissan Motor Co Ltd | Wheel alignment measuring device |
| CN105699098B (en) * | 2016-01-25 | 2018-08-21 | 华中科技大学 | Device for measuring wheel alignment parameter and KC testing stands |
| CN205808733U (en) * | 2016-06-14 | 2016-12-14 | 华晨汽车集团控股有限公司 | A kind of automobile four-wheel locating and detecting device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203069386U (en) * | 2013-01-15 | 2013-07-17 | 同济大学 | Double wishbone suspension wheel location parameter measuring apparatus |
| CN105910834A (en) * | 2016-06-14 | 2016-08-31 | 华晨汽车集团控股有限公司 | Automobile four-wheel positioning detection device and method |
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