Collision Angle Measuring Device and Method

Abstract

A collision angle measuring device and method. The collision angle measuring device includes: a laser emitting device; a support frame, on which scale marks are provided along the vertical direction, and the scale marks are used to identify the position of the laser emitting device; a transmission device, mounted on the support frame, and the transmission device is used to drive the laser emitting device to move vertically on the support frame; an angle adjusting device, used to adjust the tilt angle of the laser emitting device. The collision angle measuring device has a simple adjustment structure, convenient operation, and can quickly and accurately obtain the data required for calculating the collision angle.

Description

Technical Field

[0001] The present invention relates to the field of measurement technology, and particularly to a collision angle measurement device and method. Background Art

[0002] With the development of technology, the installation rate of automotive safety equipment is very high, but it mainly focuses on the active and passive safety aspects of occupant protection and does not involve the protection of pedestrians and cyclists. Third-party evaluation and testing structures such as ENCAP (European New Car Assessment Programme) in Europe and CNCAP in China have formulated automotive pedestrian protection performance evaluations for this situation, aiming to improve the protection ability of automobiles for pedestrians. In the pedestrian protection evaluation rules of ENCAP, the working condition of the WAD775 thigh test is specified, as Figure 12 shown. The working condition requirements are as follows: use the thigh impactor to quickly impact the position of the WAD775 marked point. The impact angle is determined according to the height marked point (IBRL) of the front anti-collision beam of the vehicle and the position of the WAD930 marked point, and the impact speed is determined according to Equation 1, where α is the collision angle.

[0003] Collision speed vt = 9.33×cos(1.2α) (Equation 1)

[0004] According to the test specifications, it can be known that the collision angle α is crucial. However, due to the complex spatial structure of the front part of the vehicle itself, it is very difficult to accurately obtain the value of the angle α. The common method is to perform spatial modeling on the height marked point (IBRL) of the front anti-collision beam of the vehicle and the WAD930 marked point using a coordinate measuring machine, and then obtain the angle through complex spatial calculations. However, the operation process is cumbersome, with high requirements for test personnel, and it is neither convenient nor practical. Summary of the Invention

[0005] In view of the above situation, it is necessary to provide a collision angle measurement device and method for solving the problem of difficult measurement of the collision angle in automotive pedestrian protection performance evaluation.

[0006] A collision angle measurement device includes:

[0007] A laser emission device;

[0008] A support frame, on which scale marks are provided along the vertical direction, and the scale marks are used to identify the position of the laser emission device;

[0009] A transmission device, installed on the support frame, and the transmission device is used to drive the laser emission device to move vertically on the support frame;

[0010] An angle adjustment device, used to adjust the tilt angle of the laser emission device.

[0011] Further, in the above collision angle measuring device, the angle adjusting device includes a mounting base, a mounting plate and an inclined stop bar. The mounting base is fixedly connected to the driving device. The mounting plate is placed on the mounting base and is hinged to the mounting base at one side. The laser emitting device is fixed on the mounting plate. The inclined stop bar is detachably fixed to the mounting base. After the mounting plate rotates along the hinge point, it can be lapped on the inclined stop bar to incline the laser emitting device.

[0012] Further, in the above collision angle measuring device, the transmission device includes a ball screw and a hand wheel. The hand wheel is connected to the ball screw through a worm and worm gear mechanism. The end of the ball screw is connected to the support frame through a bearing. A screw nut is sleeved on the ball screw. The mounting base is fixedly connected to the screw nut.

[0013] Further, in the above collision angle measuring device, the support frame includes two relatively arranged bottom plates and a plurality of support rods connected to the peripheries of the two bottom plates. The two ends of the ball screw are respectively connected to the two bottom plates through screw shafts.

[0014] Further, in the above collision angle measuring device, the mounting base is slidably connected to the support rod.

[0015] Further, in the above collision angle measuring device, a guide block is fixedly provided on the mounting base, and a guide groove adapted to the guide block is provided along the length direction of the support rod.

[0016] Further, in the above collision angle measuring device, two mounting brackets with different heights are provided on the mounting base for mounting the inclined stop bar. The two mounting brackets are respectively used to make the inclination angle between the mounting plate and the horizontal plane be 15° and 45°.

[0017] Further, in the above collision angle measuring device, a scale parallel to the laser emitting device is fixedly provided on the mounting plate. The scale is used to measure the position of the laser emitted by the laser emitting device.

[0018] Further, the above collision angle measuring device further includes a moving device fixedly provided at the bottom of the support frame. The moving device is used to control the movement of the collision angle measuring device.

[0019] An embodiment of the present invention further provides a collision angle measuring method, which is applied to the collision angle measuring device described in any one of the above. The collision angle measuring method includes:

[0020] Move the collision angle measuring device to the front of the vehicle to be measured;

[0021] Turn on the laser emission device so that the laser projection direction of the laser emission device is horizontally projected onto the vehicle to be measured;

[0022] Adjust the height of the laser emission device through the transmission device, and respectively record the height of the laser emission device when the projection light of the laser emission device aligns with the height marking point on the front anti-collision beam of the vehicle to be measured and the marking point of WAD930, that is, H HB0 and H HW0 ;

[0023] Adjust the laser emission device to tilt by 15° or 45° through the angle adjustment device, and again respectively record the height of the laser emission device when the projection light of the laser emission device aligns with the height marking point on the front anti-collision beam of the vehicle to be measured and the marking point of WAD930, that is, H k and H i ;

[0024] According to the measured heights H HB0 、H HW0 、H k and H i Calculate the collision angle of the vehicle to be measured.

[0025] Further, in the above collision angle measurement method, the collision angle calculation formula is:

[0026]

[0027] where θ is the angle of inclination of the laser emission device.

[0028] The collision angle measurement device in the present invention includes a support frame, a laser emission device, a transmission device and an angle adjustment device. Through the angle adjustment device, the inclination angle of the laser emission device can be adjusted. Through the transmission module, the laser emission device can be moved vertically along the support frame to adjust the height of the laser emission device, and the positions of the laser emission device before and after height adjustment are recorded through the scale on the support frame. Through this device, the horizontal projection measurement and inclination angle measurement of the height marking point of the front anti-collision beam (IBRL) and the position of the WAD930 marking point can be performed, and the projection height data can be obtained. The adjustment structure of the collision angle measurement device in the present invention is simple, the operation is convenient, and the data required for calculating the collision angle can be obtained quickly and accurately. Description of the Drawings

[0029] Figure 1 is a schematic structural diagram of the collision angle measurement device in the embodiment of the present invention;

[0030] Figure 2 is a schematic structural diagram of the transmission device in the embodiment of the present invention;

[0031] Figure 3 It is a schematic structural diagram of the adjusting device in the embodiment of the present invention;

[0032] Figure 4 It is a schematic structural diagram after the adjusting device in the embodiment of the present invention is assembled with the laser emitting device;

[0033] Figure 5 and Figure 6 are inclined stop bars with inclination angles of 15° and 45° respectively;

[0034] Figure 7 It is a schematic structural diagram of the bottom of the collision angle measuring device;

[0035] Figure 8 It is a schematic diagram of the laser emitting device in a horizontal state during the measurement process;

[0036] Figure 9 It is a schematic diagram of the laser emitting device in an inclined state during the measurement process;

[0037] Figure 10 is Figure 9 a schematic structural diagram in the A direction of region B in;

[0038] Figure 11 It is the calculation principle of the collision angle in the embodiment of the present invention;

[0039] Figure 12 It is a schematic diagram of a collision test in the prior art.

[0040] Description of main component symbols

[0041] Detailed implementation manners

[0042] For ease of understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0043] It should be noted that when an element is referred to as being "fixedly provided on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0045] Please refer to Figure 1 , which is the collision angle measuring device 1 in the embodiment of the present invention, including a laser emitting device 10, a support frame 20, a transmission device 30, and an angle adjusting device 40. The laser emitting device 20 is used to emit laser. For example, in the embodiment of the present invention, the laser emitting device adopts a laser level. Scale marks are provided on the support frame 10 along the vertical direction, and the scale marks are used to identify the height of the laser emitting device 20. The transmission device 30 is installed on the support frame 10, and the transmission device 30 is used to drive the laser emitting device 20 to move along the vertical direction on the support frame 10. The angle adjusting device 40 is used to adjust the tilt angle of the laser emitting device 20.

[0046] The support frame 10 includes two bottom plates 11 and a plurality of support rods 12 connected to the peripheries of the two bottom plates 11. The bottom plate 11 is square, and four support rods 12 can be provided and are circumferentially arranged at the edge of the bottom plate 11. The support rods 12 are installed on the bottom plate through fixed brackets, and adjacent support rods 12 are connected by connecting rods, and the connecting rods and the support rods are connected by strengthening brackets to enhance the stability of the support frame.

[0047] As Figure 2 shown, the transmission device 30 includes a ball screw 31 and a hand wheel 32, and the hand wheel 32 is connected to the ball screw 31 through a worm and gear mechanism. The worm and gear mechanism includes a driving worm 33 and a driving gear 34. The hand wheel 31 is fixedly connected to the end of the driving worm 33, and the driving worm 33 meshes with the driving gear 34. The ball screw 31 is placed between the four support rods 12, and both ends are respectively fixedly connected to the two bottom plates 11 through a screw bearing 35. The driving worm 33 is fixedly connected to the bottom plate 11 at the upper end of the support frame 10 through a worm bearing 36.

[0048] As Figure 3 and Figure 4As shown, the angle adjustment device 40 includes a mounting base 41, a mounting plate 42, and an inclined stop bar 43. The mounting base 41 includes a lead screw nut mounting plate 411, a mounting plate 412, and a fixing plate 413 arranged in sequence from top to bottom. The lead screw nut mounting plate 411, the mounting plate 412, and the fixing plate 413 are fixedly connected by two parallel fixing rods 414. A lead screw nut 37 is sleeved on the ball screw 31. A through hole 415 is formed in the lead screw nut mounting plate 411. The ball screw 31 passes through the through hole 415 and is fixedly connected to the mounting plate 413 through the lead screw nut 37. The laser emitting device 20 is fixed on the mounting plate 42. One side of the mounting plate 42 away from the fixing rod 414 is fixedly connected to the fixing plate 413 through a turning hinge 44, that is, the mounting plate 42 can rotate around the hinge point.

[0049] Further, a height marking bracket 50 is fixedly provided on one side of the fixing plate 413. The height marking bracket 50 is used to indicate the scale on the support frame 10.

[0050] The mounting base 41 is respectively slidably connected to the four support rods 12 through four guide blocks 60. Two of the four guide blocks 60 are respectively located on the two fixing rods 414, and the other two are located on the side of the lead screw nut mounting plate 411 away from the fixing rod 414. A guide groove adapted to the slider 60 is formed on each support rod 12.

[0051] The angle adjustment device 40 and the laser emitting device 20 can be driven by the transmission device 30 to move up and down together along the support rod 12. Specifically, when the handwheel 32 is rotated, the handwheel 32 drives the transmission worm 33 to rotate. The transmission worm 33 drives the transmission worm wheel 34 to rotate, and then the ball screw 31 rotates, causing the lead screw nut 37 to move up and down. Since the laser emitting device 20 is fixedly connected to the lead screw nut 37 through the mounting 41 seat, the laser emitting device 20 can move up and down with the lead screw nut 37.

[0052] The inclined stop bar 43 is detachably fixed on the mounting base 41. Specifically, a mounting bracket 70 is fixedly provided on each of the two fixing rods 414. A card slot adapted to the inclined stop bar 43 is formed on the mounting bracket 70. The inclined stop bar 43 can be clamped in the card slot.

[0053] The installation position of the inclined bar 43 is above the mounting plate 412, and the height from the mounting plate is a height obtained through pre-calculation, that is, it is related to the angle at which the mounting plate 412 needs to be inclined. When the mounting plate 412 rotates around the hinge point, the side away from the hinge point can be lapped on the inclined bar 43, so that the mounting plate 412 is inclined at a certain angle. Specifically, in implementation, a baffle 416 is fixedly provided at one end of the mounting plate 412 away from the hinge point. When the mounting plate 413 is lapped on the inclined bar 43 through the baffle 416, it plays a role in fixing the mounting plate 413.

[0054] In order to reduce the calculation difficulty of the collision angle, the inclination angle of the mounting plate when lapped on the inclined bar is 15° or 45°, that is, the angle with the horizontal plane is 15° or 45°. These two inclination angles can meet the usage requirements of different vehicle models. Generally, micro vehicles adopt a 45° inclination angle, sedans and small SUVs can adopt either a 15° inclination angle or a 45° inclination angle, and pickups and large SUVs adopt a 15° inclination angle.

[0055] In this embodiment, mounting brackets 70 with two heights can be provided on the fixed rod to install the inclined bar, and these two height mounting points meet the requirements of 15° and 45° inclination angles.

[0056] Further, as Figure 5 and Figure 6 shown, in order to make the lap between the inclined bar 43 and the mounting plate 413 more stable, the lap surfaces of the inclined bar 43 are set to two types with inclinations of 15° and 45°, that is, when the mounting plate 413 is lapped on the inclined bar 43, the lap surface fits with the bottom surface of the mounting plate 413.

[0057] Since the laser emitting device 20 is fixed on the mounting plate 412, when the mounting plate 412 is inclined at 15° or 45°, the laser emitting device 20 is also inclined at 15° or 45°, and the corresponding laser emitting angle is also inclined by the corresponding angle.

[0058] Further, in order to facilitate the zero-point calibration of the laser emitting device 20, a scale 80 parallel to the laser emitting device 20 is fixedly provided on the mounting plate 412. The scale 80 is used to measure the position of the laser emitted by the laser emitting device. During the measurement of the collision angle, the position of the laser emitted by the laser emitting device 20 should always remain unchanged. During the initial measurement, the reading of the projection of the level on the scale needs to be recorded, and the recorded data is HA0. This value is used to monitor whether there is displacement when the laser level mounting plate rotates in the subsequent steps. If HA0 changes in the subsequent steps, the installation of the laser level needs to be adjusted to keep HA0 within the range of ±1 mm to ensure the measurement accuracy.

[0059] Further, for the convenience of moving the collision angle measuring device 1, the collision angle measuring device 1 further includes a moving device. As Figure 7 shown, the moving device includes at least three universal wheels 90 installed at the bottom of the support device, and a locking pedal is further provided on the universal wheel 90. When measuring the collision angle, the collision angle measuring device 1 can be moved through the moving device, and the device can be made to face the vehicle to be measured directly by adjusting the universal caster 90, and the locking pedal of the universal wheel 90 is stepped on to keep the measuring device stationary.

[0060] Further, for the convenience of carrying the collision angle measuring device 1, a handle 13 is fixedly installed on the support frame 10.

[0061] The collision angle measuring device in this embodiment includes a support frame, a laser emission device, a transmission device, and an angle adjustment device. The tilt angle of the laser emission device can be adjusted through the angle adjustment device, and the laser emission device can be moved along the support frame in the vertical direction through the transmission module to adjust the height of the laser emission device, and the positions of the laser emission device before and after height adjustment are recorded through the scale on the support frame. By measuring the horizontal projection and tilt angle of the height marking point (IBRL) of the front bumper beam and the position of the WAD930 marking point respectively, the projection height data is recorded, and the collision angle of the collision block can be calculated using the calculation formula.

[0062] The embodiment of the present invention also provides a collision angle measuring method, which is applied to the collision angle measuring device in the above embodiment.

[0063] The collision angle measuring method includes the following steps:

[0064] Step 1, move the collision angle measuring device to the front of the vehicle to be measured;

[0065] Step 2, turn on the laser emission device so that the laser projection direction of the laser emission device projects horizontally onto the vehicle to be measured;

[0066] Step 3, adjust the height of the laser emission device through the transmission device, and record the height of the laser emission device respectively when the projection light of the laser emission device aligns with the height marking point of the front bumper beam and the marking point of WAD930 on the vehicle to be measured, that is, H HB0 and H HW0 ;

[0067] Step 4, adjust the laser emission device to tilt 15° or 45° through the angle adjustment device, and record the height of the laser emission device again respectively when the projection light of the laser emission device aligns with the height marking point of the front bumper beam and the marking point of WAD930 on the vehicle to be measured, that is, H k and Hi ;

[0068] Step 5, according to the measured heights H HB0 、H HW0 、H k and H i calculate the collision angle of the vehicle to be measured.

[0069] The formula for calculating the collision angle is:

[0070]

[0071] where θ is the angle of inclination of the laser emission device.

[0072] As Figure 8 shown, when measuring the collision angle, the laser emission device is pushed to the front of the vehicle to be measured, and the distance from the vehicle to be measured is in the range of 300 mm to 700 mm. Specifically, when implementing, for a test vehicle with a relatively large overall vehicle height, a smaller distance value is taken; for a test vehicle with a relatively small overall vehicle height, a larger distance value is taken. The height of the laser emission device is adjusted through the transmission device so that the laser emitted by the laser emission device is aligned with the height marking point of the front anti-collision beam on the vehicle to be measured, and the scale at the position of the laser emission device on the support frame is recorded, that is, H HB0 .

[0073] As Figure 9 shown, rotate the mounting plate, place a 15-degree inclined strip on the 15-degree inclined strip mounting bracket, and use the inclined strip to support the laser level mounting plate. At this time, the projected laser line of the laser emission device forms a 15-degree angle with the horizontal direction. Again, adjust the height of the laser emission device through the transmission device so that the projected laser line is aligned with the position of the height marking point of the front anti-collision beam, record the corresponding reading on the support frame, and record the data as H HB15 , as Figure 10 shown.

[0074] Remove the 15-degree inclined strip, and adjust the mounting plate back to the initial horizontal position. Adjust the height of the laser emission device through the transmission device so that the laser projection line is aligned with the WAD930 marking point, and record the reading on the scale corresponding to the support frame of the laser emission device at this time. Record the data as H HW0 .

[0075] Rotate the laser level mounting plate, place a 15-degree inclined strip on the 15-degree inclined strip mounting bracket, and use the strip to support the laser level mounting plate. At this time, the projected laser line of the laser level forms a 15-degree angle with the horizontal direction. Again, adjust the height of the laser emission device through the transmission device so that the projected laser line is aligned with the WAD930 marking point, and record the reading corresponding to the scale on the support frame. Record the data as H HW15 .

[0076] The calculation principle of the collision angle refers to Figure 11 , substituting the measured H HB0 , H HW0 , H HB15 and H HW15 into the following formula to calculate the collision angle α:

[0077]

[0078] where θ is the inclination angle of 15°, and the parameter H i is equal to H HW15 , H k is equal to H HB15 .

[0079] It can be understood that in other embodiments of the present invention, when measuring the angle, the mounting plate can also be lapped on the 45° inclined strip, that is, the inclination angle θ of the laser emitting device is 45°. In this case, the calculation principle and formula of the collision angle are the same as those described above.

[0080] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0081] The above-described embodiments only represent the implementation manners of the present invention, and their descriptions are relatively specific and detailed, but should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A collision angle measuring device, characterized in that, Comprising: A laser emission device; A support frame, on which scale marks are provided along the vertical direction, and the scale marks are used to identify the position of the laser emission device; A transmission device, installed on the support frame, and the transmission device is used to drive the laser emission device to move vertically on the support frame; An angle adjustment device, used to adjust the tilt angle of the laser emission device. The angle adjustment device includes a mounting seat, a mounting plate and an inclined stop bar. The mounting seat is fixedly connected to the transmission device. The mounting plate is placed on the mounting seat and is hinged to the mounting seat at one side. The laser emission device is fixed on the mounting plate. The inclined stop bar is detachably fixed on the mounting seat. After the mounting plate rotates along the hinge point on the mounting seat, it can be lapped on the inclined stop bar to tilt the laser emission device. Two mounting brackets with different heights are provided on the mounting seat for mounting the inclined stop bar. The two mounting brackets are respectively used to make the tilt angle of the mounting plate with the horizontal plane be 15° and 45°; A scale is fixedly provided on the mounting plate parallel to the laser emission device, and the scale is used to measure the position of the laser emitted by the laser emission device.

2. The collision angle measuring device according to claim 1, characterized in that The transmission device includes a ball screw and a handwheel. The handwheel is connected to the ball screw through a worm and worm gear mechanism. The end of the ball screw is connected to the support frame through a bearing. A lead screw nut is sleeved on the ball screw, and the mounting seat is fixedly connected to the lead screw nut.

3. The collision angle measuring device according to claim 2, wherein, The support frame includes two oppositely arranged bottom plates and a plurality of support rods connected to the peripheries of the two bottom plates. The two ends of the ball screw are respectively connected to the two bottom plates through screw shafts.

4. The collision angle measuring device according to claim 3, wherein The mounting seat is slidably connected to the support rod.

5. The collision angle measuring device according to claim 4, wherein, A guide block is fixedly provided on the mounting seat, and a guide groove adapted to the guide block is provided on the support rod along its length direction.

6. The collision angle measuring device according to claim 1, wherein, It further includes a moving device fixedly provided at the bottom of the support frame, and the moving device is used to control the movement of the collision angle measuring device.

7. A method for measuring a collision angle, characterized in that, Applied to the collision angle measuring device according to any one of claims 1 to 6, the collision angle measuring method includes: Moving the collision angle measuring device to the front of the vehicle to be measured; Turning on the laser emission device to make the laser projection direction of the laser emission device project horizontally onto the vehicle to be measured; Adjust the height of the laser emission device through the transmission device, and respectively record the height of the laser emission device when the projected light of the laser emission device aligns with the height marking point on the front anti-collision beam of the vehicle to be measured and the marking point of the WAD930, that is, H HB0 and H HW0 ; Adjust the laser emission device to tilt by 15° or 45° through the angle adjustment device, and record again the height of the laser emission device when the projected light of the laser emission device aligns with the height marking point on the front anti-collision beam of the vehicle to be measured and the marking point of WAD930, which are H k and H i ; Based on the measured height H HB0 、H HW0 、H k and H i Calculate the collision angle of the vehicle to be measured 8. The collision angle measurement method according to claim 7, characterized in that, The collision angle calculation formula is: Where θ is the angle of inclination of the laser emission device.

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