CN112304638A - Pedestrian protection aPLI leg dynamic calibration device and method - Google Patents
Pedestrian protection aPLI leg dynamic calibration device and method Download PDFInfo
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- CN112304638A CN112304638A CN202011190111.5A CN202011190111A CN112304638A CN 112304638 A CN112304638 A CN 112304638A CN 202011190111 A CN202011190111 A CN 202011190111A CN 112304638 A CN112304638 A CN 112304638A
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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
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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Abstract
The invention discloses a dynamic calibration device and a dynamic calibration method for a pedestrian protection aPLI leg, wherein the dynamic calibration device comprises a suspension mechanism, a capturing mechanism and an impact mechanism; the suspension mechanism comprises a suspension module, a vertical sliding assembly, a balance module, a transverse connecting piece, a suspension angle adjusting module, an electromagnet and a suspension module; the aPLI leg is connected to the electromagnet in a vertical state through the suspension module; the electromagnet is connected to the transverse connecting piece through an electromagnet mounting block and a suspension angle adjusting module, and the suspension angle adjusting module is used for adjusting the vertical angle of the aPLI leg; the transverse connecting piece can be connected to the suspension module in a vertically movable mode through the vertical sliding assembly and the balance module; the impact mechanism is arranged in front of the aPLI leg and used for impacting the aPLI leg; the catching mechanism is arranged behind the aPLI leg and used for catching the aPLI leg. The dynamic calibration device has the advantages of simple structure, wide application range, high calibration precision and efficiency and effective protection of the aPLI leg.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a dynamic calibration device and method for a pedestrian protection aPLI leg.
Background
The aPLI legs are used for simulating the process that the front part of the automobile impacts the real human lower leg shape to evaluate the collision protection performance of the automobile on the lower leg shape of the pedestrian. To ensure that the performance of the aPLI leg meets the use requirements, the aPLI leg needs to be dynamically calibrated after a certain number of impacts. Whether the calibration result is accurate directly influences the test result, in the aPLI leg calibration process, strict requirements are imposed on the position, posture and the like of a leg impacted by regulations, the weight of the aPLI leg reaches 25kg, the aPLI leg is freely flown after being dynamically impacted by a honeycomb aluminum block with the initial speed of 40km/h, and the problem of how to ensure that the aPLI leg is not damaged after being flown is also a problem.
In addition, dynamic calibration of the aPLI leg for protecting pedestrians is a very important link in test preparation work, and the time consumption and the accuracy of the dynamic calibration of the aPLI leg directly influence the test efficiency and the accuracy of the test result. How to efficiently and accurately complete the dynamic calibration of the pedestrian protection aPLI leg is one of the subjects of intensive research.
Disclosure of Invention
The invention aims to solve the technical problem of providing a dynamic calibration device for a pedestrian protection aPLI leg, which has the advantages of simple structure, wide application range, high calibration precision and efficiency and effective protection of the aPLI leg.
The invention also aims to solve the technical problem of providing a dynamic calibration method for the pedestrian protection aPLI leg, which is simple to operate, does not need to repeatedly adjust the position and the height of an impact module, and effectively improves the precision and the efficiency of calibration.
In order to solve the technical problem, the invention provides a dynamic calibration device for a pedestrian protection aPLI leg, which comprises a suspension mechanism, a capturing mechanism and an impact mechanism, wherein the suspension mechanism is arranged on the upper portion of the leg;
the suspension mechanism comprises a suspension module, a vertical sliding assembly, a balance module, a transverse connecting piece, a suspension angle adjusting module, an electromagnet and a suspension module;
the aPLI leg is connected to the electromagnet in a vertical state through the suspension module;
the electromagnet is connected to the transverse connecting piece through an electromagnet mounting block and a suspension angle adjusting module, and the suspension angle adjusting module is used for adjusting the vertical angle of the aPLI leg;
the transverse connecting piece can be connected to the suspension module in a vertically movable mode through the vertical sliding assembly and the balance module;
the impact mechanism is arranged in front of the aPLI leg and used for impacting the aPLI leg; the catching mechanism is arranged behind the aPLI leg and used for catching the aPLI leg.
As an improvement of the above scheme, the vertical sliding assembly comprises a vertical guide rail and a vertical sliding group, the vertical guide rail is fixedly connected to the suspension module, and the vertical sliding group is slidably connected to the vertical guide rail;
the balance module comprises a balancer and a steel wire rope, the balancer is fixed at the upper end of the suspension module, one end of the steel wire rope is connected with the vertical sliding group, the other end of the steel wire rope penetrates through the balancer to be connected to the suspension module, and the balancer adjusts balancing force according to the weight of the vertical sliding group.
As an improvement of the scheme, a plurality of semicircular U-shaped holes are formed in the hanging angle adjusting module, and the fixing piece penetrates through the semicircular U-shaped holes to connect the hanging angle adjusting module with the transverse connecting piece.
As an improvement of the scheme, the hanging module comprises a hook and a connecting piece connected with the hook, the hook is magnetically attracted at the bottom of the electromagnet, and the aPLI leg is fixedly connected to the connecting piece.
As an improvement of the scheme, a first inclined plane is arranged at the bottom of the electromagnet, a second inclined plane is arranged at the top of the hook, and the first inclined plane and the second inclined plane are parallel to each other.
As an improvement of the above scheme, the inclination angle of the first inclined plane is 15 to 35 °.
As an improvement of the scheme, a hanging goniometer is arranged on the electromagnet mounting block, and a height sensor is arranged on the transverse connecting piece.
As an improvement of the above scheme, the catching mechanism comprises a catching bracket, a motor assembly and a controller assembly, the motor assembly is arranged above the catching bracket, one end of a rope is connected to the motor assembly, and the other end of the rope is connected to a connecting piece connected with the aPLI leg; the controller is arranged on the capturing bracket and used for receiving the signal of the transmitting system and controlling the motor assembly.
As an improvement of the scheme, the impact mechanism comprises an impact module and a laser module, the laser module is arranged on the impact module, horizontal laser emitted by the laser module is flush with the upper surface of the impact module, and vertical laser emitted by the laser module is coincident with the central line of the impact module.
Correspondingly, the invention also provides a dynamic calibration method for the aPLI leg of the pedestrian protection, which adopts the dynamic calibration device for the aPLI leg of the pedestrian protection to carry out calibration and comprises the following steps:
firstly, suspending an aPLI leg on a suspension module in a vertical state, and connecting a capture mechanism with the aPLI leg through a rope;
secondly, installing an impact module with a honeycomb aluminum block at the front end in a transmitting system, aligning horizontal laser transmitted by a laser module on the impact module with the preset position of the aPLI leg, and enabling vertical laser to coincide with the central line of the aPLI leg;
thirdly, enabling the horizontal front surface of the impact module to impact a preset position of the aPLI leg, enabling the electromagnet to be separated from the suspension module so as to enable the aPLI leg to fly freely, and collecting bending moment of the aPLI leg and data of a displacement sensor;
and fourthly, after the aPLI leg flies freely, the aPLI leg is caught and protected by the catching mechanism through tightening the rope. The implementation of the invention has the following beneficial effects:
according to the invention, the height of the calibration position of the aPLI leg is adjusted by adopting the vertical sliding component, the transverse connecting piece and the height sensor, so that the adjustment of the impact position which moves up to 120mm from the center position of the knee joint can be completed quickly and accurately, the consistent posture of the aPLI leg is ensured, the time for adjusting the impact module is reduced, and the dynamic calibration consistency of the aPLI leg and the calibration efficiency are improved.
In addition, the angle between the side surface of the electromagnet mounting block and the horizontal plane is measured and displayed in real time by adopting the suspension angle meter, and the aPLI leg is ensured to be in a vertical state by adjusting the suspension angle adjusting module. Because the attitude of the aPLI leg directly influences the result of dynamic calibration, the vertical angle of the aPLI leg is measured and displayed in real time by using the goniometer, the efficiency of angle adjustment can be improved, and the precision of the dynamic calibration of the aPLI leg is improved.
After the height position of the aPLI leg is adjusted, because the vertical sliding group, the aPLI leg and the like have certain weights, the vertical sliding group may generate vertical displacement when the locking device of the vertical sliding group is unscrewed or screwed, and further the position of the impact calibration is inaccurate. The balance force is adjusted by the balancer, so that the vertical sliding group can not freely move under the condition of no locking, and the locking device does not need to be screwed down or unscrewed when different impact positions are switched, thereby improving the calibration efficiency and eliminating the position height error caused by screwing down or unscrewing.
The invention adopts the electromagnet to adsorb and fix the aPLI leg, can effectively keep the longitudinal vertical plane of the aPLI leg parallel to the longitudinal vertical plane of the impact module, reduces the position adjustment time of the aPLI leg, and can accurately control the moment of leg separation.
In addition, the bottom of the electromagnet and the top of the suspension module are designed into inclined planes, so that the suspension module can be effectively ensured not to interfere with the movement of the aPLI leg, the leg type of the aPLI leg is in a free flight state within 15ms from the first contact moment, and the efficiency and the accuracy of dynamic calibration of the aPLI leg are improved.
According to the invention, the aPLI leg is accurately captured and protected by the capturing mechanism, wherein the controller assembly is connected with the transmitting system to receive signals of the transmitting system, the starting time of the motor assembly is accurately controlled, and meanwhile, the sponge can prevent the aPLI leg from rigidly impacting the capturing support, so that the protection performance of the aPLI leg is effectively improved.
The calibration device is mainly used for a dynamic calibration test of the aPLI leg for protecting pedestrians, can quickly and accurately adjust the calibration posture and height of the aPLI leg through simple operation, can display the vertical angle and height of the aPLI leg in real time, and can also accurately capture the aPLI leg after free flight. For the calibration test of another position, the position and the height of the impact module do not need to be repeatedly adjusted, and the precision and the efficiency of dynamic calibration of the aPLI leg for protecting pedestrians are greatly improved.
Overall, the calibration device is strong in universality, tests of other impact angles and impact heights can be carried out only by adjusting the hook and the vertical sliding group, and equipment cost is effectively saved. In addition, the impact module can be installed in the existing launching system, and meanwhile, the capturing mechanism can also be applied to impact tests, such as impact tests of aPLI legs, so that the aPLI legs or other modules are effectively protected, and the equipment cost is effectively saved.
The calibration method provided by the invention is simple to operate, the position and the height of the impact module do not need to be repeatedly adjusted, and the calibration precision and efficiency are effectively improved. The launching system enables the impact module to impact the aPLI leg according to the speed and the angle required by the laws and regulations, the aPLI leg is separated from the suspension module within 15ms from the first contact moment, the capture support is started after the aPLI leg is separated from the suspension module, the aPLI leg is captured to protect the leg shape, and the leg damage caused by free flight after separation is avoided.
Drawings
FIG. 1 is a perspective view of a pedestrian protection aPLI leg dynamic calibration apparatus of the present invention;
FIG. 2 is a schematic view of the installation of the vertical slide assembly, the balancing module and the transverse connection of the present invention;
FIG. 3 is a schematic view of the balance module of the present invention;
FIG. 4 is a schematic view of a first angular installation of the transverse connection, the suspension angle adjustment module, the electromagnet and the suspension module of the present invention;
FIG. 5 is a second angular installation schematic of the transverse connection, the suspension angle adjustment module, the electromagnet, and the suspension module of the present invention;
FIG. 6 is a schematic view of the mounting of the suspension module of the present invention to the aPLI legs;
fig. 7 is a schematic structural diagram of the pedestrian protection aPLI leg dynamic calibration device of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the dynamic calibration device for the pedestrian protection aPLI leg provided by the invention comprises a suspension mechanism 1, a capturing mechanism 2 and an impact mechanism 3, wherein the suspension mechanism 1 is used for suspending an aPLI leg 4, the impact mechanism 3 is installed in an existing launching system, the impact mechanism horizontally and positively impacts on a preset impact point of the aPLI leg 4 at a specified speed, and the aPLI leg 4 can be separated from the suspension mechanism 1 and can fly freely within a certain time after impact. When the suspension aPLI leg 4 is separated from the suspension mechanism 1 and flies freely, the capture mechanism 2 captures the aPLI leg 4, and the aPLI leg 4 is prevented from being broken.
The impact mechanism 3 comprises an impact module 31 and a laser module 32, the impact module 31 is arranged in front of the aPLI leg 4, the laser module 32 is arranged on the impact module 31, horizontal laser emitted by the laser module is flush with the upper surface of the impact module 31, and vertical laser emitted by the laser module coincides with the central line of the impact module 31. The impact module 31 can be installed in an existing launching system, a special honeycomb aluminum block 33 is fixed at the front end of the impact module, the upper surface of the honeycomb aluminum block 33 is flush with the upper surface of the impact module 31, and the honeycomb aluminum block 33 has specified size and performance.
The suspension mechanism 1 comprises a suspension module 11, a vertical sliding assembly 12, a balance module 13, a transverse connecting piece 14, a suspension angle adjusting module 15, an electromagnet 16 and a suspension module 17.
Referring to fig. 2, the vertical sliding assembly 12 is disposed on the suspension module 11, wherein the vertical sliding assembly 12 includes a vertical rail 121 and a vertical sliding group 122, and the vertical rail 121 is fixedly connected to the suspension module 11 by bolts; the vertical sliding group 122 is slidably connected to the vertical guide rail 121, and can slide along the vertical guide rail 121. The vertical guide rail 121 is provided with a groove, the vertical sliding group 122 is provided with a boss, and the boss is embedded in the groove in the vertical guide rail 121, so that the vertical sliding group 122 can slide along the vertical guide rail 121.
The suspension module 11 is preferably of a steel plate fold-welding structure, the thickness of the steel plate is larger than 5mm, the stability of the suspension module can be enhanced through a transverse steel plate, and the bottom of the suspension module 11 is fixed on a test platform through bolts. The vertical guide rails 121 and the vertical sliding group 122 are preferably made of aluminum.
Referring to fig. 2 and 3, the balancing module 13 includes a balancer 131 and a wire rope 132, the balancer 131 is fixedly installed at the upper end of the suspension module 11, one end of the wire rope 132 is connected to the vertical sliding group 122, and the other end of the wire rope 132 passes through the balancer 131 and is connected to the suspension module 11, and the balancing module 13 sets the balancing force of the balancer 131 according to the weight of the vertical sliding group 122, so as to ensure that the vertical sliding group 122 does not fall freely. Wherein the balancing force is adjusted by adjusting the tightness of the spring inside the balancer 131.
The cross connecting member 14 is fixed to the vertical sliding group 122 by bolts, and can move up and down along with the vertical sliding group 122. And a height sensor 18 is arranged on the transverse connecting piece 14, so that the height of the transverse connecting piece 14 can be displayed in real time. The height sensor 18 is mounted on the bottom surface of the transverse connector by means of bolts and measures the distance from the bottom surface of the transverse connector 14 to the test platform. Preferably, the height sensor 18 is a laser height sensor with a measuring range of 0-1000 mm and a precision of 0.1 mm.
According to the invention, the height of the calibration position of the aPLI leg 4 is adjusted by adopting the vertical sliding component 12, the transverse connecting component 14 and the height sensor 18, so that the adjustment of the impact position of the aPLI leg 4 which moves up by 120mm from the center position of the knee joint can be rapidly and accurately completed, the consistent posture of the aPLI leg 4 is ensured, the time for adjusting the impact module 31 is reduced, and the dynamic calibration consistency of the aPLI leg 4 and the calibration efficiency are improved.
When the height position of the aPLI leg 4 is adjusted, the vertical sliding group 122 may be displaced vertically when the locking device of the vertical sliding group 122 is unscrewed or screwed because the vertical sliding group 122, the aPLI leg 4 and the like have a certain weight, and thus the impact calibration position is inaccurate. According to the invention, the balance force is adjusted by the balancer 131, so that the vertical sliding group 122 can not freely move under the condition of no locking, and the locking device does not need to be screwed down or unscrewed when different impact positions are switched, thereby improving the calibration efficiency and eliminating the position height error caused by screwing down or unscrewing.
Referring to fig. 4, the electromagnet 16 is connected to the suspension angle adjusting module 15 through an electromagnet mounting block 161, and the suspension angle adjusting module 15 is fixedly connected to the transverse connecting member 14 through a bolt, wherein the suspension angle adjusting module 15 is provided with four semicircular U-shaped holes, the bolt penetrates through the semicircular U-shaped holes to form a fixed connection with the transverse connecting member 14, and the angle between the side surface of the electromagnet mounting block 161 and the horizontal plane can be adjusted by adjusting the position of the bolt in the semicircular U-shaped holes.
The electromagnet mounting block 161 is provided with a central hole and peripheral through holes, wherein bolts pass through the central through holes to be connected with the electromagnet 16, and other bolts pass through the peripheral through holes to be connected and fixed with the suspension angle adjusting module 15.
The electromagnet mounting block 161 is provided with a suspension goniometer 19 for measuring the side angle of the electromagnet mounting block 161. Preferably, the suspension goniometer 19 is a hall effect type angle sensor with a measurement accuracy of 0.05 degrees, is powered by a battery, and has a measured angle value of the angle between the side surface of the electromagnet mounting block 161 and the horizontal plane, which is displayed in real time by a display screen, and has a display accuracy of 0.01 degrees.
The invention adopts the suspension angle gauge 19 to measure and display the angle between the side surface of the electromagnet mounting block 161 and the horizontal plane in real time, and ensures that the aPLI leg 4 is in a vertical state by adjusting the suspension angle adjusting module 15. Because the attitude of the aPLI leg 4 directly affects the result of dynamic calibration, the goniometer is used for measuring and displaying the vertical angle of the aPLI leg 4 in real time, the efficiency of angle adjustment can be improved, and the precision of dynamic calibration of the aPLI leg 4 can be improved.
The transverse connecting member 14 may be a transverse bracket or a transverse beam, but is not limited thereto.
Referring to fig. 5 and 6, the aPLI legs 4 are connected to the electromagnets 16 by suspension modules 17 in an upright position. Specifically, the hanging module 17 comprises a hook 171 and a connecting piece 172 connected with the hook 171, the hook 171 is magnetically attracted to the bottom of the electromagnet 16, and the aPLI leg 4 is connected to the connecting piece 172. Wherein the connecting member 172 is fixed to the aPLI leg 4 by a bolt, and the end thereof is connected to the hook 171 by a bolt, so that the angle of the hook 171 is rotated and fixed in a vertical plane with respect to the centerline of the aPLI leg 4.
Preferably, the bottom of the electromagnet 16 is provided with a first inclined plane, the top of the hook 171 is provided with a second inclined plane, and the first inclined plane and the second inclined plane are parallel to each other, so that the suspension module 17 is effectively ensured not to interfere with the movement of the aPLI leg 4, the aPLI leg 4 is in a free flight state within 15ms from the first contact moment, and the efficiency and accuracy of dynamic calibration of the aPLI leg 4 are improved.
Preferably, the inclination angle of the first inclined plane is 15 to 35 °.
More preferably, the inclination angle of the first inclined plane is 20-30 degrees.
Most preferably, the angle of inclination of the first ramp is 25 °.
The electromagnet 16 is preferably a cylindrical sucker electromagnet 16 with the adsorption capacity of 40kg, a neat and smooth appearance and a through threaded hole in the central axis.
The bottom of the electromagnet 16 is further provided with a groove, the top of the hook 171 is provided with a protrusion matched with the groove, and during installation, the protrusion is inserted into the groove so as to realize accurate assembly of the electromagnet 16 and the hook 171.
According to the invention, the aPLI leg 4 is adsorbed and fixed by the electromagnet 16, so that the longitudinal vertical plane of the aPLI leg 4 can be effectively kept parallel to the longitudinal vertical plane of the impact module 31, the position adjustment time of the aPLI leg 4 is shortened, and the electromagnet 16 can accurately control the moment of leg detachment.
In addition, the bottom of the electromagnet 16 and the top of the suspension module 17 are designed into inclined planes, so that the suspension module 17 can be effectively ensured not to interfere with the movement of the aPLI leg 4, the leg type of the aPLI leg 4 is in a free flight state within 15ms from the first contact moment, and the efficiency and the accuracy of dynamic calibration of the aPLI leg 4 are improved.
Referring to fig. 1 and 7, the catching mechanism 2 includes a catching bracket 21, a motor assembly 22, a sponge 23 and a controller assembly 24, the catching bracket 21 is disposed behind the aPLI leg 4, the motor assembly 22 is disposed above the catching bracket 21, one end of a rope 25 is connected to the motor assembly 22, and the other end is connected to a connecting member 172 connected to the aPLI leg 4. The motor assembly 22 is preferably a motor with a rated power of 2kW and a rotation speed of 800 rpm. The controller is arranged on the catching bracket 21 and used for receiving signals of the transmitting system and realizing the control of the motor assembly 22 and the electromagnet 16.
According to the invention, the aPLI leg 4 is accurately captured and protected by the capturing mechanism 2, wherein the controller assembly 24 is connected with the transmitting system to receive signals of the transmitting system, the starting time of the motor assembly 22 is accurately controlled, and meanwhile, the sponge 23 can prevent the aPLI leg 4 from rigidly impacting the capturing bracket 21, so that the protection performance of the aPLI leg 4 is effectively improved.
The calibration device is mainly used for a dynamic calibration test of the aPLI leg 4 for protecting pedestrians, can quickly and accurately adjust the calibration posture and height of the aPLI leg 4 through simple operation, can display the vertical angle and height of the aPLI leg 4 in real time, and can accurately capture the aPLI leg 4 after free flight. For the calibration test of another position, the position and the height of the impact module 31 do not need to be repeatedly adjusted, and the precision and the efficiency of dynamic calibration of the pedestrian protection aPLI leg 4 are greatly improved.
Overall, the calibration device of the invention has strong versatility, and tests of other impact angles and impact heights can be performed only by adjusting the hook 171 and the vertical sliding group 122, thereby effectively saving equipment cost. In addition, the impact module 31 of the present invention can be installed in the existing launching system, and the capture mechanism 2 can also be applied to impact tests, such as impact tests of the aPLI leg 4, so as to effectively protect the aPLI leg 4 or other modules, and effectively save equipment cost.
Correspondingly, the invention also provides a dynamic calibration method for the aPLI leg of the pedestrian protection, which adopts the dynamic calibration device for the aPLI leg of the pedestrian protection to carry out calibration and comprises the following steps:
firstly, suspending an aPLI leg on a suspension module in a vertical state, and connecting a rope on a capturing mechanism with the aPLI leg;
specifically, the plane of the suspension angle meter on the electromagnet mounting block is perpendicular to the horizontal plane by adjusting the suspension angle adjusting module, namely the suspension angle meter is displayed at 90 degrees; mounting the connecting piece on the top of the aPLI leg, and keeping the front surface of the adjusting hook parallel to the vertical central plane of the aPLI leg; the aPLI leg is suspended at the bottom of the electromagnet through the suspension module, so that the aPLI leg is in a vertical state; and one end of the rope on the catching mechanism is tied on the connecting piece, thereby realizing the connection of the catching mechanism and the aPLI leg.
Secondly, installing an impact module with a honeycomb aluminum block at the front end in a transmitting system, aligning horizontal laser transmitted by a laser module on the impact module with the preset position of the aPLI leg, and enabling vertical laser to coincide with the central line of the aPLI leg;
wherein the preset positions of the aPLI leg comprise the knee joint center position of the aPLI leg and the position of the knee joint center of the aPLI leg 120mm upwards.
Specifically, the ground clearance of the transverse connecting piece is adjusted through a vertical sliding assembly of the suspension mechanism, and the ground clearance of the aPLI leg is determined through a height sensor on the transverse connecting piece, so that horizontal laser emitted by a laser module on the impact module is aligned with a preset position of the aPLI leg.
Thirdly, enabling the horizontal front surface of the impact module to impact a preset position of the aPLI leg, enabling the electromagnet to be separated from the suspension module to enable the aPLI leg to fly freely, and collecting bending moment of the aPLI leg and data of a displacement sensor;
wherein the electromagnet is separated from the suspension module within 15ms from the first contact moment.
And fourthly, after the aPLI leg flies freely, the aPLI leg is caught and protected by the catching mechanism through tightening the rope.
Wherein, the controller assembly is connected with the launching system, and sets the aPLI leg disengaging time and the starting time of the catching mechanism. Preferably, the motor assembly is activated after 60ms disengagement of the aPLI leg to tighten the rope.
The calibration method provided by the invention is simple to operate, the position and the height of the impact module do not need to be repeatedly adjusted, and the calibration precision and efficiency are effectively improved. The launching system enables the impact module to impact the aPLI leg according to the speed and the angle required by the laws and regulations, the aPLI leg is separated from the suspension module within 15ms from the first contact moment, the capture mechanism is started after the aPLI leg is separated from the suspension module, the aPLI leg is captured to protect the leg shape, and the leg damage caused by free flight after separation is avoided.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (10)
1. A dynamic calibration device for a pedestrian protection aPLI leg is characterized by comprising a suspension mechanism, a capturing mechanism and an impact mechanism;
the suspension mechanism comprises a suspension module, a vertical sliding assembly, a balance module, a transverse connecting piece, a suspension angle adjusting module, an electromagnet and a suspension module;
the aPLI leg is connected to the electromagnet in a vertical state through the suspension module;
the electromagnet is connected to the transverse connecting piece through the electromagnet mounting block and the suspension angle adjusting module so as to enable the aPLI leg to be in a vertical state;
the transverse connecting piece can be connected to the suspension module in a vertically movable mode through the vertical sliding assembly and the balance module;
the impact mechanism is arranged in front of the aPLI leg and used for impacting the aPLI leg; the catching mechanism is arranged behind the aPLI leg and used for catching the aPLI leg.
2. The dynamic calibration device for the legs of the pedestrian protection aPLI as claimed in claim 1, wherein the vertical sliding assembly comprises a vertical guide rail and a vertical sliding group, the vertical guide rail is fixedly connected to the suspension module, and the vertical sliding group is slidably connected to the vertical guide rail;
the balance module comprises a balancer and a steel wire rope, the balancer is fixed at the upper end of the suspension module, one end of the steel wire rope is connected with the vertical sliding group, the other end of the steel wire rope penetrates through the balancer to be connected to the suspension module, and the balancer adjusts balancing force according to the weight of the vertical sliding group.
3. The dynamic calibration device for the aPLI leg for pedestrian protection as claimed in claim 1, wherein the suspension angle adjustment module is provided with a plurality of semicircular U-shaped holes, and the fixing member passes through the semicircular U-shaped holes to connect the suspension angle adjustment module with the transverse connecting member.
4. The dynamic calibration device for the aPLI leg for pedestrian protection as claimed in claim 1, wherein the suspension module comprises a hook and a connecting piece connected with the hook, the hook is magnetically attracted to the bottom of the electromagnet, and the aPLI leg is fixedly connected to the connecting piece.
5. The dynamic calibration device for the aPLI leg for pedestrian protection as claimed in claim 4, wherein the bottom of the electromagnet is provided with a first inclined surface, the top of the hook is provided with a second inclined surface, and the first inclined surface and the second inclined surface are parallel to each other.
6. The dynamic calibration device for the aPLI leg for pedestrian protection as claimed in claim 5, wherein the inclination angle of the first inclined plane is 15 ° to 35 °.
7. The dynamic calibration device for the alpli leg for pedestrian protection of claim 1, wherein a suspension goniometer is arranged on the electromagnet mounting block, and a height sensor is arranged on the transverse connecting piece.
8. The dynamic calibration device for the alpli leg for pedestrian protection of claim 1, wherein the capturing mechanism comprises a capturing bracket, a motor assembly and a controller assembly, the motor assembly is arranged above the capturing bracket, one end of a rope is connected to the motor assembly, and the other end of the rope is connected to a connecting piece connected with the alpli leg; the controller is arranged on the capturing bracket and used for receiving the signal of the transmitting system and controlling the motor assembly.
9. The dynamic calibration device for the aPLI leg for pedestrian protection as claimed in claim 1, wherein the impact mechanism comprises an impact module and a laser module, the laser module is arranged on the impact module, the laser module emits horizontal laser light which is flush with the upper surface of the impact module, and the laser module emits vertical laser light which is coincident with the midline of the impact module.
10. A dynamic calibration method for a pedestrian protection aPLI leg is characterized by being calibrated by adopting the dynamic calibration device for the pedestrian protection aPLI leg of any one of claims 1-9, and comprising the following steps:
firstly, suspending an aPLI leg on a suspension module in a vertical state, and connecting a capture mechanism with the aPLI leg through a rope;
secondly, installing an impact module with a honeycomb aluminum block at the front end in a transmitting system, aligning horizontal laser transmitted by a laser module on the impact module with the preset position of the aPLI leg, and enabling vertical laser to coincide with the central line of the aPLI leg;
thirdly, enabling the horizontal front surface of the impact module to impact a preset position of the aPLI leg, enabling the electromagnet to be separated from the suspension module so as to enable the aPLI leg to fly freely, and collecting bending moment of the aPLI leg and data of a displacement sensor;
and fourthly, after the aPLI leg flies freely, the aPLI leg is caught and protected by the catching mechanism through tightening the rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011190111.5A CN112304638A (en) | 2020-10-30 | 2020-10-30 | Pedestrian protection aPLI leg dynamic calibration device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011190111.5A CN112304638A (en) | 2020-10-30 | 2020-10-30 | Pedestrian protection aPLI leg dynamic calibration device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112304638A true CN112304638A (en) | 2021-02-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114964814A (en) * | 2022-05-26 | 2022-08-30 | 杭州集普科技有限公司 | Leg type dynamic calibration device and method |
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