CN119246083A - A vehicle collision test bias parameter calibration system and method - Google Patents
A vehicle collision test bias parameter calibration system and method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/0078—Shock-testing of vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
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Abstract
本发明公开了一种汽车碰撞试验偏置参数校准系统及方法，属于汽车碰撞校准技术领域，首先通过车辆宽度测量机构进行整车宽度L的测量校准，将对称测量标尺调整为居中状态，以车身中心为零位，标尺刻度向两侧延伸，以此测量出二分之一车身宽度，进而计算出任意车身宽度及碰撞点位刻线。其次使用重叠校准机构，此机构呈平行四边形连杆联动机构，并使用双层框架，加强其稳定性，通过激光校准装置，进行车辆与刚性壁障体的位置校准，通过激光距离传感器，与激光距离传感器保持垂直，通过调整重叠校准机构，实现刚体壁障与车身重叠位置的校准调整。通过该重叠校准机构的矫正调整，可将车辆重叠偏移误差控制在±1mm，极大的减小了误差，提高了汽车偏置碰撞试验的精度。
The present invention discloses a vehicle collision test offset parameter calibration system and method, which belongs to the field of vehicle collision calibration technology. First, the vehicle width L is measured and calibrated by a vehicle width measuring mechanism, and the symmetrical measuring ruler is adjusted to a centered state. The center of the vehicle body is taken as the zero position, and the ruler scale extends to both sides, so as to measure half of the vehicle body width, and then calculate any vehicle body width and collision point position line. Secondly, an overlapping calibration mechanism is used. This mechanism is a parallelogram linkage mechanism, and a double-layer frame is used to enhance its stability. The position of the vehicle and the rigid barrier is calibrated by a laser calibration device. The laser distance sensor is used to keep it perpendicular to the laser distance sensor. By adjusting the overlapping calibration mechanism, the calibration adjustment of the overlapping position of the rigid barrier and the vehicle body is realized. Through the correction adjustment of the overlapping calibration mechanism, the vehicle overlapping offset error can be controlled within ±1mm, which greatly reduces the error and improves the accuracy of the vehicle offset collision test.
Description
Technical Field
The invention belongs to the technical field of automobile collision calibration, and particularly relates to a system and a method for calibrating offset parameters of an automobile collision test.
Background
The management rules of the whole vehicle collision test mainly comprise 15 working conditions marked by national standards, C-NCAP, C-IASI and Euro NCAP aiming at an ACU controller algorithm, wherein partial working conditions need to test the vehicle to carry out local overlap collision tests relative to a barrier system (fixed, movable, rigid, deformed barriers and the like), and the overlapping rates are 25%, 40% and 50% respectively. The effectiveness of the test vehicle on occupant protection, the advancement of the vehicle body structure design, the maintainability of the vehicle after collision and the accuracy and the robustness of the ACU algorithm configured by the vehicle under different overlapping rates are evaluated.
Taking the "25% frontal offset crash test procedure on driver side (2023 edition)" as an example in the chinese insurance automobile safety index (C-IASI) evaluation procedure, it is required that the test vehicle and the fixed rigid barrier perform frontal crash at 25% overlap rate on driver side. That is, the test vehicle is required to strike a rigid barrier with an edge having a radius of 150mm at a speed of 64.4km/h + -1 km/h, and the width of the overlapping portion in the vehicle traveling direction (i.e., X direction) must be strictly controlled within a range of 25% + -1% of the vehicle width (1% being about 17mm to 20 mm) at the first moment when the two are in contact, otherwise the test is judged to be ineffective. The factors for analyzing the influence overlapping rate are as follows, 1, before the test, the minimum offset distance between the collision arc edge of the rigid barrier and the center line of the traction track in the Y direction is 25% of the width of the vehicle, the position error requirement is less than or equal to 1mm, 2, before the test, 3 collision mark lines are required to be marked on the test vehicle hood, respectively, 24%, 25% and 26% of the width of the vehicle, and are parallel to the X-direction center plane, the measurement error requirement is less than or equal to 1mm, 3, when the test vehicle is started, the X-direction center plane of the test vehicle coincides with the center line of the traction track, the measurement error requirement is less than or equal to 1mm, 4, after the test, the vehicle passes through the acceleration process of about 90m, and the Y-direction offset error is less than or equal to 10mm. Because the factor 4 is greatly influenced by the adjustment states of the vehicle chassis in different development stages, the error cannot be further reduced by the technical means, and therefore whether the factors 1,2 and 3 are accurately measured is the key for influencing whether the test is successful.
At present, a metric ruler is commonly adopted in the industry to be matched with a laser level meter with a tripod for distance measurement, and the defects of 1, repeated steps and low efficiency are obvious. Each set of the specified dimensions requires that a metric ruler is used to measure whether the line of the laser on the ground is parallel to the center of the track, and if the laser angle is slightly deviated, multiple measurements are needed to ensure the parallelism, and the whole process requires at least 15 minutes. In addition, if the number of the sizes is multiple, the steps are repeated, so that the test preparation time is further prolonged, and 2, the manual measurement has errors, and the accuracy is poor. Because of the need of matching with personnel for multiple measurement, the measurement deviation can enlarge the parallel error of the laser and the track on a large scale, and 3, the number of people is large, and the input-output ratio is low. Because the laser needs to be ensured to be parallel to the whole size of the track, a straight line is determined according to two points, the measuring point needs to be at least one position at a distance from each other, and more points can be actually obtained, so that at least two persons are required to coordinate and measure.
Disclosure of Invention
In order to solve the problems, the invention provides a system and a method for calibrating offset parameters of an automobile crash test. Firstly, the vehicle width measuring mechanism is used for measuring and calibrating the width L of the whole vehicle, a symmetrical measuring scale is adjusted to be in a centered state, the center of the vehicle body is used as a zero position, scale scales extend to two sides, one half of the vehicle body width is measured, and then 25% of the vehicle body width and collision point scribing lines are calculated. And secondly, an overlapping calibration mechanism is used, the mechanism is a parallelogram connecting rod linkage mechanism, a double-layer frame is used for enhancing the stability of the mechanism, and a lower layer X-direction first connecting rod is provided with a locking centering device for centering adjustment and locking with a driving track. The upper layer X-direction second connecting rod is provided with an X-direction bidirectional laser calibration device for calibrating the positions of the vehicle and the rigid wall barrier, and is provided with an X-direction Y-direction level bar so as to ensure that the upper layer X-direction second connecting rod keeps a horizontal state during laser calibration, one end of the upper layer X-direction second connecting rod is provided with an X-direction laser distance sensor, a laser irradiation reference plane is kept vertical to the laser distance sensor on the side surface of the upper layer X-direction first connecting rod, and the calibration and adjustment of the overlapping position of the rigid wall barrier and the vehicle body are realized by adjusting an overlapping calibration mechanism. Through the correction and adjustment of the overlapping calibration mechanism, the overlapping offset error of the vehicle can be controlled to be +/-1 mm, so that the error is greatly reduced, and the accuracy of the automobile offset collision test is improved.
The automobile crash test bias parameter calibration system comprises an overlapping calibration mechanism, a vehicle width measurement calibration mechanism, a crash vehicle and a rigid wall barrier body, wherein the overlapping calibration mechanism is arranged between the crash vehicle and the rigid wall barrier body, and the travel route of the crash vehicle;
the overlapping calibration mechanism is a frame structure formed by a plurality of connecting rods and pin shafts in a surrounding mode, and the reflecting reference plate is arranged on the frame structure;
One of the connecting rods is provided with a bidirectional laser calibrating device and a laser distance sensor, the reflecting reference plates are arranged on the light-emitting paths of the laser distance sensor, the number of the pins is four, the inside of the reflecting reference plates is hollow, the top of the reflecting reference plates is provided with threaded through holes for connecting the connecting rods to form a parallelogram connecting rod linkage mechanism, and the connecting rods can rotate by taking the pins as axes;
the vehicle width measurement calibration mechanism comprises a T-shaped symmetrical scale and measurement targets, wherein the measurement targets are respectively erected on two sides of a collision vehicle, so that the measurement targets and the wheel center of the wheel are kept in a plane and perpendicular to the ground, and the measurement targets are matched with the T-shaped symmetrical scale.
Further, the connecting rod comprises an upper layer X-direction first connecting rod, an upper layer X-direction second connecting rod, an upper layer Y-direction first connecting rod, an upper layer Y-direction second connecting rod, a lower layer X-direction first connecting rod, a lower layer X-direction second connecting rod, a lower layer Y-direction first connecting rod and a lower layer Y-direction second connecting rod.
Further, a Y-direction level bar and an X-direction level bar are further arranged on the connecting rod provided with the bidirectional laser calibrating device.
Further, the pin shaft is provided with a universal wheel adjusting mechanism, and the bottom of the pin shaft is provided with a universal wheel.
Further, a positioning locking mechanism is arranged on one of the connecting rods and comprises an adjusting handle, an adjusting cam and a locking pawl, the locking pawl is arranged in the middle of the connecting rod, the adjusting cams are arranged on two sides of the locking pawl, and the adjusting cams are matched with the adjusting handle.
A calibration method for offset parameters of an automobile crash test comprises the following steps:
s1, positioning an overlapping calibration mechanism and calibrating;
s2, placing a collision vehicle and a vehicle width measurement and calibration mechanism;
S3, marking a collision line;
S4, adjusting a rigid wall barrier;
s5, performing calibration operation.
The method comprises the steps of S1, placing a collision vehicle and a rigid wall barrier on a traction runway, wherein the distance between the collision vehicle and the rigid wall barrier is 3 m-5 m, a rigid wall barrier base is fixedly connected with the traction runway, an overlapping calibration mechanism is fixed on the traction runway between the collision vehicle and the rigid wall barrier, a laser calibration device is opened, one side of laser irradiates a test vehicle, the other side of the laser irradiates a barrier system, after the laser is overlapped with the edge of the runway, the position of the laser calibration device and a connecting rod is locked, and the plane where the laser is located is overlapped with the center line of the traction runway.
Further, the step S2 specifically comprises the steps of adjusting the tire pressure of a collision vehicle, ensuring that the four tires are all of the same design tire pressure, positioning the X-direction central plane of the vehicle through the license plate mounting holes of the front bumper and the rear bumper of the collision vehicle, enabling the X-direction central plane of the vehicle to coincide with a laser line, enabling a collision vehicle width measurement calibration mechanism to cross over the axle center of the front wheel of the collision vehicle, enabling measurement targets to be tightly attached to the side surface of the front wheel, and adjusting a T-shaped symmetrical scale to enable zero points of the T-shaped symmetrical scale to be located at the middle position between the two measurement targets, wherein the laser line coincides with the center of the T-shaped symmetrical scale.
Further, the step S3 specifically includes calculating the size to be offset, finding out the corresponding scale on the T-shaped symmetric scale, expanding the overlapping calibration mechanism to enable the laser line to completely coincide with the scale value on the required T-shaped symmetric scale, and marking the collision line along the laser line on the surface of the collision vehicle.
Further, step S4 is specifically to calculate the size to be offset and find the corresponding scale on the T-shaped symmetric scale, expand the overlapping calibration mechanism until the laser line completely coincides with the scale value on the required T-shaped symmetric scale, fine tune the rigid barrier body along the Y direction so that the arc surface at the outermost end of the edge of the rigid barrier body is tangent to the laser line, and fix the collision surface of the barrier system.
The beneficial effects of the invention are as follows:
through the application of the overlapping calibration mechanism, the offset distance between a plurality of lasers and the track can be quickly adjusted by single operation, the error is less than 1mm, the efficiency is improved, the accuracy is ensured, and the labor is saved.
Drawings
FIG. 1 is a schematic diagram of an overlay calibration mechanism according to the present invention;
FIG. 2 is a general schematic of the present invention;
FIG. 3 is a schematic view of a vehicle width measurement calibration mechanism according to the present invention;
FIG. 4 is a schematic view of a positioning locking mechanism according to the present invention;
FIG. 5 is a folded state of the overlay calibration mechanism of the present invention;
Fig. 6 is a flow chart of the present invention.
In the figure:
The device comprises a 1-layer overlapping calibration mechanism, an 11-layer X-direction first connecting rod, a 101Y-direction level ruler, a 102 bidirectional laser calibration device, a 103X-direction level ruler, a 104 laser distance sensor, a 12-layer X-direction second connecting rod, a 1201 reflection reference plate, a 13-layer Y-direction first connecting rod, a 14-layer Y-direction second connecting rod, a 15-layer X-direction first connecting rod, a 16-layer X-direction second connecting rod, a 1601 positioning locking mechanism, a 1602 binaural nut, a 1603 adjusting handle, a 1604 adjusting cam, a 1605 locking pawl, a 17-layer Y-direction first connecting rod, a 18-layer Y-direction second connecting rod, a 19 pin shaft, a 110 universal wheel adjusting mechanism, a 2-test vehicle, a 201 vehicle width measurement calibration mechanism, a 2011 measurement standard, a 2012T-type measurement scale, a 202 rigid wall body, a 203X-direction calibration laser beam and a 204Y-direction ranging laser beam.
Detailed Description
It should be noted that, in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured and operate in a specific orientation.
In the present invention, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly, and for example, "fixed" may be a fixed connection, a removable connection, or an integral body, and the connection may be a mechanical connection or an electrical connection, and the connection may be a direct connection or an indirect connection via an intermediary, or may be a communication between two elements or an interaction relationship between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
A system and method for calibrating collision offset parameters of an automobile comprises an overlap calibration mechanism 1, a vehicle width measurement calibration mechanism 201, a collision vehicle 2 and a rigid wall barrier 202.
The overlay calibration mechanism comprises an upper layer X-direction first connecting rod 11, a Y-direction horizontal ruler 101, a bidirectional laser calibration device 102, an X-direction horizontal ruler 103, a laser distance sensor 104, an upper layer X-direction second connecting rod 12, a reflection reference plate 1201, an upper layer Y-direction first connecting rod 13, an upper layer Y-direction second connecting rod 14, a lower layer X-direction first connecting rod 15, a lower layer X-direction second connecting rod 16, a positioning locking mechanism 1601, a lower layer Y-direction first connecting rod 17, a lower layer Y-direction second connecting rod 18, a pin 19 and a universal wheel adjusting mechanism 110.
The upper layer X-direction first connecting rod 11 comprises a Y-direction level 101, a bidirectional laser calibration device 102, an X-direction level 103 and a laser distance sensor 104, wherein the Y-direction level 101 is used for adjusting the Y-direction level parameter of the upper layer X-direction first connecting rod 11, the X-direction level 103 is used for adjusting the X-direction level parameter of the upper layer X-direction first connecting rod 11 so as to ensure the working level of the bidirectional laser calibration device 102, and the bidirectional laser calibration device 102 is used for calibrating the overlapping area of the test vehicle 2 and the rigid wall barrier 202.
The vehicle width measurement calibration mechanism 201 comprises a T-shaped symmetrical scale 2012 and measurement targets 2011, wherein the measurement targets 2011 are respectively erected on two sides of a vehicle body, so that the measurement targets and wheel centers are kept in a plane and perpendicular to the ground, the measurement targets are matched with the T-shaped symmetrical scale 2012 for measuring the actual vehicle body width, the vehicle body width is set to be L, the display scales on the two final sides of the T-shaped symmetrical scale 2012 are L/2, and zero positions of the T-shaped symmetrical scale 2012 are the central axis positions of the vehicle body.
The four pins 19 are hollow, the top end of each pin is provided with a threaded through hole for connecting each connecting rod to form a parallelogram connecting rod linkage mechanism, the connecting rods can freely rotate along the pins, and due to the design of the hollow structure, the adjustment limit of the overlapping calibration mechanism 1 is that two layers of connecting rods are in a completely overlapped straight line state in the Z direction, and at the moment, the calibration light beam of the bidirectional laser calibration device 102 coincides with the central axis of the vehicle.
The universal wheel adjusting mechanism 110 is built in the pin 19, the height of the universal wheel can be adjusted through the handle, the working level of the overlap calibration mechanism 1 can be adjusted, and the universal wheel can be moved conveniently when the overlap calibration mechanism 1 is moved.
The positioning locking mechanism 1601 comprises a double-lug nut 1602, an adjusting handle 1603, an adjusting cam 1604 and a locking pawl 1605, and is arranged on the lower layer X-direction second connecting rod 16, the locking pawl 1605 is arranged at the middle position and is used for fixing the overlapping calibration mechanism 1, the adjusting cam 1604 is arranged at two sides of the locking pawl 1605, the adjusting cam 1604 is abutted against the inner side of a track by rotating the adjusting handle 1603, so that automatic centering adjustment is realized, the locking pawl 1605 is used for locking the lower layer X-direction second connecting rod 16 on the track, and the purpose of fixing the overlapping calibration mechanism 1 is further realized.
A laser distance sensor 104 is installed at one end of the upper layer X toward the first link 11, and its laser beam is irradiated to the reflection reference plate 1201 for feeding back the calibration value of the overlay calibration mechanism 1. Let the laser distance sensor feedback indicator be L 1, the overlap area of the test vehicle 2 and the rigid wall barrier 202 be L 2, L 2＝L/2-L1, and let the overlap ratio of the vehicle offset crash test be x%, L 2＝x％L＝L/2-L1.
After the working level of the overlap calibration mechanism 1 is adjusted, the connecting rod of the overlap calibration mechanism 1 is expanded and adjusted, the L 1 is adjusted to be target data through the calculated data of the L 1 laser distance sensor 104, then a laser beam is projected in a two-way mode by using the two-way laser calibration device 102, a scribing mark is made on a front cover of the test vehicle 2, and then the relative position of the steel body wall barrier 202 and the test vehicle 2 is corrected and adjusted under the guidance of the laser beam, so that the calibration work of the overlap ratio of the test vehicle and the rigid barrier is realized.
The test vehicle 2 is the target collision test vehicle.
The rigid wall barrier 202 is a transversely movable rigid wall barrier collision body, and ideally forms a rigid structure with the ground, and has enough strength to ensure that the rigid wall barrier 202 does not generate obvious deformation in the collision process, and the relative position of the rigid wall barrier 202 can be adjusted through the Y direction in different overlap ratio collision tests, so as to adapt to different test requirements.
A calibration test method for automobile collision offset parameters comprises the following specific procedures of
Step one, positioning and overlapping a calibration mechanism and calibrating
1.1 Placing a test vehicle and a barrier system on a traction runway (the track is in the center of the traction runway), wherein the distance between the test vehicle and the barrier system is 3 m-5 m in the direction of an extension line of the runway, and a base of the barrier system is fixedly connected with the traction runway according to the specification.
1.2, At a proper position between the test vehicle and the barrier system, firstly shrinking the overlapped calibration mechanism (in a straight line state in the Z direction), then placing an adjusting cam on the lower surface of the lower layer X-direction second connecting rod into a traction track, rotating an adjusting handle to enable the adjusting cam to abut against the inner side of the track to realize automatic centering, then rotating a double-lug nut and a locking pawl to lock the relative position of the lower layer X-direction second connecting rod and the track, finally opening a laser calibration device, and enabling one side of laser to irradiate the test vehicle and the other side of laser to irradiate the barrier system.
And 1.3, slightly pushing the upper layer X-direction first connecting rod to the outside to enable the laser to coincide with the edge of the track, if the laser is not coincident with the edge of the track, rotating the laser calibration device along the Z axis until the laser calibration device is completely coincident with the track, and then locking the relative positions of the laser calibration device and the upper layer X-direction first connecting rod.
1.4 Slightly pushing the upper layer X to the first connecting rod inwards to enable the overlap calibration mechanism to be restored to a linear state, and keeping the laser on, wherein the plane of the laser is coincident with the center line of the traction track.
Step two, placing the vehicle and measuring and calibrating the organization of vehicle width
2.1 Adjusting the tire pressure of the test vehicle, and ensuring that 4 tires are all the same design tire pressure.
2.2 Positioning the X-direction center plane of the vehicle through the front and rear bumper license plate mounting holes of the test vehicle, so that the X-direction center plane of the vehicle is overlapped with the laser line.
And 2.3, crossing the vehicle width measuring and calibrating mechanism over the axle center of the front wheel of the test vehicle, and enabling the measuring standard pole to be tightly attached to the side surface of the front wheel.
2.4 Adjusting the T-shaped symmetrical scale to enable the zero point of the T-shaped symmetrical scale to be positioned at the middle position between the two measuring standard poles, and enabling the laser line to coincide with the center of the T-shaped symmetrical scale.
Step three, collision line marking
3.1 Calculating the size of the required offset and finding the corresponding scale on a T-shaped symmetric scale.
And 3.2, slightly pushing the upper layer X to the first connecting rod outwards, and unfolding the overlapping calibration mechanism until the laser line completely coincides with the scale value on the required T-shaped symmetrical scale.
3.3 Marking the impact line along the laser line on the test vehicle surface.
And 3.4, repeating the steps 3.1-3.3 if a plurality of sizes are required to be marked.
Step four, adjusting the barrier system
4.1 Calculating the size of the required offset and finding the corresponding scale on a T-shaped symmetric scale.
And 4.2, slightly pushing the upper layer X to the first connecting rod outwards, and unfolding the overlapping calibration mechanism until the laser line completely coincides with the scale value on the required T-shaped symmetrical scale.
4.3 Trimming the barrier system in the Y-direction so that the outermost camber of its edge is tangential to the laser line.
4.4 Securing the barrier system impact surface.
The foregoing is merely illustrative of specific embodiments of the present invention, and the scope of the invention is not limited thereto, but any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention will be apparent to those skilled in the art within the scope of the present invention. And all that is not described in detail in this specification is well known to those skilled in the art.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Claims (10)
1. A calibration system for offset parameters of an automobile collision test is characterized by comprising an overlapping calibration mechanism, a vehicle width measurement calibration mechanism, an impact vehicle and a rigid wall barrier, wherein the overlapping calibration mechanism is arranged between the impact vehicle and the rigid wall barrier, on the running route of the impact vehicle, the overlapping calibration mechanism is a frame structure formed by encircling a plurality of connecting rods and pin shafts, and a reflection reference plate, one connecting rod is provided with a bidirectional laser calibration device and four laser distance sensors, the reflection reference plate is arranged on the light emergent light path of the laser distance sensor, the pin shafts are hollow, the top of the reflection reference plate is provided with threaded through holes for connecting the connecting rods to form a parallelogram connecting rod linkage mechanism, the connecting rods can rotate by taking the pin shafts as axes, the vehicle width measurement calibration mechanism comprises T-shaped symmetrical scales and measurement targets, the measurement targets are respectively erected on two sides of the impact vehicle, the measurement targets and wheel centers are kept in a plane and are perpendicular to the ground, and the measurement targets are matched with the T-shaped symmetrical scales.
2. The system of claim 1, wherein the links comprise an upper layer X-direction first link, an upper layer X-direction second link, an upper layer Y-direction first link, an upper layer Y-direction second link, a lower layer X-direction first link, a lower layer X-direction second link, a lower layer Y-direction first link, and a lower layer Y-direction second link.
3. The system for calibrating offset parameters of automobile crash test according to claim 1, wherein the connecting rod provided with the bidirectional laser calibrating device is further provided with a Y-direction level bar and an X-direction level bar.
4. The system for calibrating offset parameters in a car crash test according to claim 1, wherein the pin is provided with a universal wheel adjusting mechanism, and the bottom is provided with a universal wheel.
5. The system for calibrating offset parameters of automobile crash test according to claim 1, wherein one of the connecting rods is provided with a positioning locking mechanism comprising an adjusting handle, an adjusting cam and a locking pawl, the locking pawl is arranged in the middle of the connecting rod, the two sides of the locking pawl are provided with the adjusting cams, and the adjusting cams are matched with the adjusting handle.
6. The method for calibrating the offset parameters of the automobile crash test is characterized by comprising the following steps of:
S1 positioning and calibrating the overlay calibration mechanism of any one of claims 1-5;
s2, placing a collision vehicle and a vehicle width measurement and calibration mechanism;
S3, marking a collision line;
S4, adjusting a rigid wall barrier;
s5, performing calibration operation.
7. A method for calibrating offset parameters of automobile crash test according to claim 6 is characterized by comprising the following steps of placing a crash vehicle and a rigid wall barrier on a traction runway, wherein the distance between the crash vehicle and the rigid wall barrier is 3 m-5 m, a rigid wall barrier base is fixedly connected with the traction runway, an overlapping calibration mechanism is fixed on a traction track between the crash vehicle and the rigid wall barrier, a laser calibration device is opened, one side of laser irradiates the test vehicle, the other side irradiates the barrier system, after the laser coincides with the edge of the track, the laser calibration device and the position of a connecting rod are locked, and the plane of the laser coincides with the center line of the traction track.
8. The method for calibrating the offset parameters of the automobile crash test according to claim 6 is characterized by comprising the following steps of adjusting the tire pressure of a crashed automobile, ensuring that four tires are all of the same design tire pressure, positioning an X-direction center plane of the automobile through front and rear bumper license plate mounting holes of the crashed automobile to enable the X-direction center plane of the automobile to coincide with a laser line, enabling a crashed automobile width measuring and calibrating mechanism to cross over the axle center of a front wheel of the crashed automobile, enabling measuring standard poles to be required to be closely attached to the side surface of the front wheel, and adjusting a T-shaped symmetrical scale to enable zero points of the T-shaped symmetrical scale to be located at the center position between the two measuring standard poles, wherein the laser line coincides with the center of the T-shaped symmetrical scale.
9. The method for calibrating offset parameters of an automobile crash test according to claim 6, wherein the step S3 is specifically to calculate the size of the offset to be required, find the corresponding scale on the T-shaped symmetric scale, expand the overlapping calibration mechanism to make the laser line completely coincide with the scale value on the required T-shaped symmetric scale, and mark the crash line along the laser line on the surface of the crashed automobile.
10. The method for calibrating offset parameters of an automobile crash test according to claim 6, wherein step S4 comprises calculating the size of the offset to be measured, finding the corresponding scale on the T-shaped symmetric scale, expanding the overlapping calibration mechanism until the laser line is completely coincident with the scale value on the T-shaped symmetric scale, trimming the rigid barrier body along the Y direction so that the arc surface of the outermost edge of the rigid barrier body is tangent to the laser line, and fixing the crash surface of the barrier system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411253746.3A CN119246083A (en) | 2024-09-09 | 2024-09-09 | A vehicle collision test bias parameter calibration system and method |
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| CN202411253746.3A CN119246083A (en) | 2024-09-09 | 2024-09-09 | A vehicle collision test bias parameter calibration system and method |
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