CN112444404B - A unsmooth road surface analogue means for automotive test - Google Patents
A unsmooth road surface analogue means for automotive test Download PDFInfo
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Abstract
A concave-convex road surface simulation device for automobile testing belongs to the field of unmanned automobile testing equipment and is used for solving the problem that obstacles or potholes with different sizes and shapes which can be automatically changed and can be conveniently moved and simulated on a real road surface; the top surface of the barrier block is a barrier surface, the block part below the barrier surface is provided with a hollow part in the transverse direction, and the hollow part enables the roller at the top corner of the partition plate to be in rolling contact with the lower surface of the barrier surface, so that the barrier block has the effect of automatically changing barriers with different sizes and shapes.
Description
Technical Field
The invention belongs to the field of unmanned vehicle test equipment, and particularly relates to a concave-convex road surface simulation device
Background
The unmanned automobile technology integrating a plurality of technologies such as automatic control, a system structure, artificial intelligence, visual calculation and the like is a highly developed product of computer science, mode recognition and intelligent control technology, and has wide application prospect in the fields of national defense and national economy. The unmanned automobile is an intelligent automobile which senses road environment through a vehicle-mounted sensing system, automatically plans a driving route and controls the automobile to reach a preset target. The existing unmanned driving scheme is realized by means of high-precision maps, radars, positioning technologies and the like based on real vehicles, and senses the surrounding environment of the vehicles by utilizing vehicle-mounted sensors, and controls the steering and the speed of the vehicles according to the road, vehicle position and obstacle information obtained by sensing, so that the vehicles can safely and reliably run on the road. The situations of obstacle avoidance of the automatic driving vehicle and safe processing of road surface emergency are particularly important, the existing theoretical research of the automatic driving vehicle road test is very deep, the actual research and development are not mature, and continuous testing is needed for verification and perfection. However, at present, a test field which is close to the real driving environment and can flexibly adjust the test mode according to the requirement and has the standard capability of avoiding obstacles and processing road surface emergency for the automatic driving vehicle is lacked, so that a simulated road surface obstacle test device which is close to the real driving environment and can carry out the standard capability of avoiding obstacles and processing road surface emergency for the automatic driving vehicle is urgently needed. However, the existing simulated road obstacle scheme also has some problems: the device is realized based on real vehicles, radars, cameras and the like, so that the equipment cost is high; the obstacle or the required pothole of manual laying of testing personnel of needs when simulation road surface obstacle or pothole excavates on the road surface, wastes time and energy to can not change its size and position when simulating the concave-convex road surface, can't be in the actual test quick, nimble obstacle type on the adjustment road surface of needs, test condition is not abundant enough and efficiency is lower, can not test out the reaction of unmanned vehicle face when multiple obstacle well.
Disclosure of Invention
In order to solve the problem that obstacles or potholes with different sizes and shapes which can be automatically changed and possibly appear on a real road surface can be conveniently moved and simulated, the invention provides the following technical scheme: the concave-convex road surface simulation device for the automobile test comprises a slideway, a support frame and an obstacle block; the slideway is a base with grooves, the bottom surface of the base is arranged on a test road surface, two parallel transverse grooves are formed in the top surface of the base, the two transverse grooves are longitudinally arranged, transverse ratchets are paved on the base part outside the transverse grooves, and the transverse length of the transverse ratchets is as long as or shorter than the grooves; the support frame comprises a plurality of drawer-shaped frame bodies which are transversely arranged and used for supporting the barrier blocks, each frame body is formed by surrounding a bottom plate, two partition plates and a baffle plate, the frame body is provided with a top opening and a barrier block inlet which is positioned on the side face, the bottom plate is provided with two pulleys which move along the transverse grooves, the two pulleys are arranged in the two grooves, the two partition plates are arranged in the transverse direction of the bottom plate, and the baffle plate is arranged in the longitudinal direction of the bottom plate, is close to the ratchets and is opposite to the barrier block inlet; the outer plate surface of the baffle is provided with a rotary lock catch, and the peripheral surface of the lock catch body is provided with ratchets which can be meshed with the transverse ratchets; the top of the peripheral surface of the roller is higher than the upper edge of the partition plate; the top surface of the barrier block is a barrier surface, and in the transverse direction, the block part below the barrier surface is provided with a hollow part, and the hollow part enables the roller at the top corner of the partition plate to be in rolling contact with the lower surface of the barrier surface.
Has the advantages that: the device can conveniently move and simulate obstacles or potholes with different sizes and shapes which can be automatically changed and possibly appear on a real road surface, and provides the unmanned automobile with the road surface testing environment as much as possible.
Drawings
Fig. 1 is a schematic view of the overall structure of the apparatus.
Fig. 2 is a schematic view of a slide rail structure in the device.
Fig. 3 is a schematic view of the structure of the supporting frame in the device.
Fig. 4 is a side view of a support frame in the device.
Fig. 5 is an exemplary diagram of various obstacle blocks in the apparatus.
Fig. 6 is a bottom view of the barrier block in the device.
Fig. 7 is a schematic view of the obstacle block exchanging apparatus.
FIG. 8 is a schematic view of a fixed slide rail and barrier support bracket for use in the unmanned vehicle test.
Fig. 9 is a detail view of the contact of the obstacle block with the support frame for the driverless vehicle road test.
Fig. 10 is a road surface effect diagram for the driverless vehicle road test.
Wherein: 1. the device comprises a sliding rail, 2. a support frame, 21. a pulley, 22. a rotating lock catch, 23. a pulley, 3. a barrier block, 31. an upper surface, 4. a replacing device, 41. a square sleeve, 42. a base, 43 a square supporting plate and 44. a metal sleeve.
Detailed Description
Example 1: the present embodiment aims to provide a rough road surface simulation apparatus, which can provide road side environments with various rough obstacles as required, and can adjust the rough degree and the distance of the obstacles at will in road test. The technical scheme is as follows: as shown in fig. 1, the rough road surface simulation apparatus includes a slide rail 1, a support frame 2, a barrier block 3, and a replacement device 4. The slide rail is of a metal base structure, the bottom end of the slide rail is in contact with a test road surface, and two parallel grooves are formed in the slide rail and matched with wheels on the barrier quick support frame 2. One side of the slide rail is provided with a ratchet which is matched with a rotary lock catch 22 on the support frame and used for fixing the slide rail and the support frame. The quick support frame of obstacle is metal and takes out ladder column structure, comprises bottom plate, partition panel, baffle and the wheel under the bottom plate (wherein the height of partition panel and baffle should be the same) for hold in the palm and carry the obstacle piece. The outer side of the baffle is provided with a rotary lock 22 driven by an asynchronous motor, the asynchronous motor is positioned in the rotary lock 22 and connected with a baffle 24, and the ratchets on the rotary lock 22 can be meshed with the ratchets on the slide rail by the rotation of the asynchronous motor. The partition panel both sides all are equipped with by fixing bearing's pulley 21, and pulley 21 upper surface is a little higher than the partition panel upper edge. Furthermore, the bottom of the support frame is provided with a pulley 23, the pulley 23 is embedded, the upper half part of the pulley is embedded into the bottom plate of the support frame, and the lower half part of the pulley can be placed into the groove of the slide rail. The obstacle blocks are mainly used for simulating various obstacles which may appear on a real road surface, are made of ABS engineering plastics, can change the surface shape, and can be used for manufacturing a plurality of obstacle blocks with different surfaces so as to simulate recesses or projections with different sizes and dimensions. The thickness of the barrier block should be slightly greater than the height of the partition and the baffle of the support frame so that its upper surface 31 can protrude beyond the baffle. In order to keep the device clear of the road, the upper surface of the barrier blocks extends to a length comparable to the thickness of the rotary lock 22 and the ratchet teeth on the track. Furthermore, a metal sheet is arranged inside one side of the barrier block, which is opposite to the baffle plate, and can act with the electromagnet on the surface of the inner sleeve in the pushing device. As shown in fig. 5, the replacing device is composed of a pushing device and a lifting bracket. The lifting support is provided with a plurality of layers of detachable square supporting plates 43, the side face of each layer of supporting plate is provided with six blocking pieces for fixing the position of the supporting plate when the supporting plate is loaded with the obstacle block, the supporting plate is nested in four vertical supporting columns and can slide up and down depending on the supporting columns, four double-layer cylindrical metal sleeves 44 are arranged at the bottom of the lowest layer of supporting plate and close to the inner side of the supporting columns, and the inner layer sleeves can be driven by a pneumatic booster pump to stretch and retract, so that the height of the supporting plate is adjusted. The pushing device consists of a base 42 and a square sleeve 41, the square sleeve is of a double-layer structure, and an inner layer can be pushed out by a pneumatic booster pump to act on the barrier blocks on the supporting plate to move; the surface of the inner sleeve is provided with an electromagnet, and when the current is switched on, the current can be generated to attract the metal sheets on the barrier block.
(1) The device has authenticity, and the shape and the size of the concave-convex barrier are diversified, so that the device can simulate barriers with different sizes and shapes possibly encountered on a real road surface, and can test the safety of the unmanned vehicle facing different barriers. The device has flexibility, and different road surface obstacles can be replaced according to needs under the condition of no need of manual operation of a tester; and the barrier can be arranged at any position in the test pavement environment as required, and is convenient and quick.
(2) The device has safety, and the device does not need testers to manually arrange and control, so that possible accidents are avoided, and the safety of the testers is protected.
(3) Aiming at various conditions possibly met in actual testing, the unmanned vehicle is provided with as many test obstacles as possible, so that the testing efficiency is improved.
(4) And the cost is saved. The surface material of the barrier block in the device is ABS engineering plastic, so that the manufacturing and maintenance cost is low, and the use is convenient.
(5) This barrier is sturdy and durable to mechanical structure is given first place to, is equipped with locking device between support frame and slide rail, can make the barrier appear when the road surface optional position remain stable, effectively prevents to lead to the barrier device to damage because of insecure when unmanned car contacts the barrier to the integrity of this barrier itself reduces the loss that the damage caused.
In setting the device in an actual road test environment, a part of a test road section needs to be excavated into a pit having a certain size and depth for placing the concave-convex road surface simulation device. The concave-convex road surface simulation device comprises a slide rail, nine partition supporting frames, a plurality of obstacle blocks, a lifting support and an obstacle pushing device. The sliding rail is firstly arranged in the pit, and then the pulley below the supporting frame is aligned with the groove on the sliding rail, so that the sliding rail acts on the sliding rail. As shown in fig. 1, a replacement device is placed on one side of a selected road, wherein a lifting support is abutted against a slide rail, a barrier block pushing device is abutted against a support frame, and the pushing device and the slide rail are positioned in the same horizontal plane. In particular, the depth of the depression in which the sliding rail is placed should be the same as the thickness of the obstacle when it is fitted into the support frame, so as to ensure that the area simulating the real road surface is level with the real road surface when the device is used. Meanwhile, the sliding support frame is correspondingly arranged in a hollow, and the depth of the hollow ensures that the pushing device, the uppermost layer supporting plate and the sliding rail are positioned in the same horizontal plane when the double-layer metal sleeve does not extend out, so that the barrier block in each layer of the supporting class can be replaced. Similarly, it is also ensured that when the double-layer metal sleeve is in the longest extension state, the pushing device, the lowest layer supporting plate and the sliding rail are in the same horizontal plane, and meanwhile, a proper number of supporting plates and barrier blocks are installed according to actual needs.
As shown in fig. 1, the support frame of the simulation apparatus is preset to nine compartments each having a width of 3m, and accordingly the barrier blocks have a width of 3 m. Whereas the width of a typical national road is 8 meters, the width of the real road surface in the test environment does not exceed the width of three compartments. Obstacle blocks with surfaces close to the real road surface can be placed in the three compartments on the opposite side of the replacing device, and when the test is paused, the sliding rail slides to the replacing device side, so that obstacle blocks with the lengths of at most three compartments are left on the road surface. Not only can restore the real road surface, but also does not need to remove the device. That is, the length direction of the road is crossed with the length direction of the device, and is preferably vertical, namely, the obstacle blocks are moved, so that various simulations can be made on the simulated road surface, and the device is suitable for being used in different environments.
When the concave-convex road surface simulation device is operated, as shown in fig. 8, firstly, the asynchronous motor in the lock catch on the baffle plate of the support frame is powered on, so that the lock catch rotates by 90 degrees, and the locking between the support frame and the slide rail is released; then, the power supply of the asynchronous motor in the pulley 23 at the bottom of the support frame in fig. 4 is switched on, so that the support frame can move transversely in the slide rail and can be locked at any position through the rotation of the lock catch. As shown in fig. 7, when any one of the six compartments on one side of the pushing device runs to be flush with the lifting bracket, the inner layer of the square sleeve 41 is pushed by the pneumatic booster pump to extend out, so that the barrier block slides out and enters the supporting bracket. When the protruding part 32 of the upper surface side of the block comes into contact with the support frame stop 25, it first interacts with the pulley 21. As shown in fig. 9, the pulley 21 is driven to rotate, so that the obstacle blocks can stably enter the supporting frame. When the barrier block is taken out, the inner layer of the square sleeve extends out to be in contact with the barrier block, and meanwhile, current is switched on, so that the electromagnet on the surface of the inner layer of the square sleeve generates strong magnetism to act with the metal sheet inside one side of the barrier block opposite to the baffle plate, and the metal sheet is adhered together through magnetism. At the moment, the pneumatic booster pump works to recycle the inner layer of the sleeve and pull the barrier block into the supporting plate. When the barrier block is replaced, the lifting support arranged in the hollow cavity is driven by the pneumatic booster pump to enable the inner layer of the cylindrical metal sleeve 44 to stretch up and down, so that the height of the supporting plate is adjusted, and the supporting plate is aligned with the pushing device and the sliding rail.
In order to ensure the safety of the vehicle during the test, a certain limit is required to be arranged on the concave or convex of the barrier. The thickness of the barrier block of the device is 30cm, the length of the bulge or the recess in the barrier block example shown in figure 5 can not exceed 30cm, correspondingly, the height of the baffle plate on the side surface of the supporting plate on the lifting support is set to be 32cm, and when a plurality of supporting plates are piled, each layer of supporting plate acts on the baffle plate of the supporting plate on the lower layer, as shown in figure 7.
The device is characterized in that the barrier blocks are diversified, and the roadside environment with various concave-convex barriers can be provided. The obstacle block can be customized to a variety of obstacle types as desired, and several alternative obstacle blocks have been presented as shown in fig. 5. The material of the barrier block is ABS engineering plastic. The ABS engineering plastic is named as plastic alloy in chemical industry, and the material has the excellent heat resistance, weather resistance, size stability and impact resistance of PC resin and the excellent processing flowability of ABS resin. Therefore, the thermoplastic elastomer can be applied to thin-wall and complex-shaped products, and can keep the excellent performance and the formability of the plastic and the material consisting of ester.
Further, in order to make the rough road surface simulation apparatus closer to the real road surface in the actual test, a marked line in the center of the real road surface is also present on the test road surface. The road center markings are three in number as shown in fig. 10. The device is simultaneously provided with the three industrial rubber bands made of the natural rubber, and the industrial rubber bands made of the natural rubber have the characteristics of good elasticity, strong toughness, low cost and the like, and can not be broken due to large deformation generated by external force. The width of the rubber band is equivalent to the width of a mark line on the road surface, the color of the rubber band is the same, the length of the rubber band is slightly longer than the width of the guide rail, and the rubber band is fixed on A, B two sides through iron nails so as to be parallel to the road surface. When testing, barrier piece lateral shifting on the slide rail, no matter barrier piece locking is died in any position, central marking all can appear on the test road surface to more press close to real roadside environment. When the protruding obstacle block of shape was through central marking, the marking of industrial rubber band simulation can take place deformation because of the effect of protruding barrier, is stretched to left side or right side, because of the characteristic of rubber materials, this rubber band can not damage, and when protruding barrier was changed or was putd aside, the marking of this rubber band simulation can get back to original position because of elasticity.
Example 2: a concave-convex road surface simulation device for automobile testing comprises a slideway, a support frame and an obstacle block; the slideway is a base with grooves, the bottom surface of the base is arranged on a test road surface, two parallel transverse grooves are formed in the top surface of the base, the two transverse grooves are longitudinally arranged, transverse ratchets are paved on the base part outside the transverse grooves, and the transverse length of the transverse ratchets is as long as or shorter than the grooves; the support frame comprises a plurality of drawer-shaped frame bodies which are transversely arranged and used for supporting the barrier blocks, each frame body is formed by surrounding a bottom plate, two partition plates and a baffle plate, the frame body is provided with a top opening and a barrier block inlet which is positioned on the side face, the bottom plate is provided with two pulleys which move along the transverse grooves, the two pulleys are arranged in the two grooves, the two partition plates are arranged in the transverse direction of the bottom plate, and the baffle plate is arranged in the longitudinal direction of the bottom plate, is close to the ratchets and is opposite to the barrier block inlet; the outer plate surface of the baffle is provided with a rotary lock catch, and the peripheral surface of the lock catch body is provided with ratchets which can be meshed with the transverse ratchets; the top of the peripheral surface of the roller is higher than the upper edge of the partition plate; the top surface of the barrier block is a barrier surface, and in the transverse direction, the block part below the barrier surface is provided with a hollow part, and the hollow part enables the roller at the top corner of the partition plate to be in rolling contact with the lower surface of the barrier surface.
Further, the rotating shaft of the asynchronous motor is located in the rotating lock 22, the body of the asynchronous motor is connected with the baffle, and the rotating shaft of the asynchronous motor rotates to enable the ratchet of the rotating lock 22 to be meshed with the ratchet on the sliding rail.
Furthermore, the pulleys 23 of the bottom plate of the support frame are embedded, the upper half part of each pulley is embedded into the bottom plate of the support frame, and the lower half part of each pulley is placed into the corresponding transverse groove.
Furthermore, the barrier blocks are used for simulating barriers on a real road surface, different barriers are simulated by the depressions or the protrusions with different areas and depths of different barrier blocks, and the thickness of each barrier block is larger than the height of the partition plate and the baffle of the support frame; the thickness of the upper surface of the barrier block higher than the baffle plate is consistent with the thickness of the rotary lock catch and the ratchet on the slide rail.
Furthermore, a metal sheet is arranged on the side face of the barrier block, which is opposite to the baffle, and the metal sheet and the electromagnet on the surface of the inner-layer cylinder in the pushing device are mutually electromagnetically adsorbed so as to draw the barrier block away from the support frame.
Further, a unsmooth road surface analogue means for vehicle test still includes the change device, and it mainly comprises pusher and liftable support, liftable support has a plurality of layers of detachable layer board, the side of every layer of layer board is erect there is the separation blade, and it is fixed with both sides layer board to support between two-layer board, a plurality of layers of layer board nestification are in four support columns of erectting, and make the layer board be located the not co-altitude of support column, be located the layer board of lower floor, its below is equipped with four double-deck cylinder type metal sleeves, and make the inlayer sleeve stretch out and draw back and adjust its height by pneumatic booster pump drive, four double-deck cylinder type metal sleeves are fixed on the support column, and the inner skleeve is fixed with the layer board bottom of lower floor, make the inner skleeve to the altitude mixture control of a plurality of layers of layer board at the support column.
Furthermore, the concave-convex road surface simulation device for automobile testing further comprises a replacing device which mainly comprises a pushing device and a support, wherein the pushing device mainly comprises a base and a square sleeve, the base is fixed at a height and faces to the barrier block in the bracket at the height, the square sleeve is of a double-layer inner sleeve structure, an inner layer cylinder is located inside an outer layer cylinder, the inner layer is connected with a pneumatic booster pump, the pneumatic booster pump is started and can be pushed out from the outer layer, and the inner layer cylinder contacts the barrier block on the supporting plate and enables the barrier block to move.
Furthermore, the surface of the inner layer sleeve is provided with an electromagnet, when the inner layer sleeve is electrified, the electromagnet generates current, the inner layer is pushed out from the outer layer by the booster pump and is in contact with the side surface of the barrier block in the support frame, the side surface is the side surface opposite to the baffle plate and is provided with a metal sheet, and the metal sheet and the electromagnet on the surface of the inner layer sleeve in the pushing device are mutually electromagnetically adsorbed to draw the barrier block out of the support frame.
Furthermore, the replacing device is positioned on one side of the slide way, the base is fixed at a position which is equal to the height of the barrier block arranged in the supporting frame, the support is positioned between the base and the barrier block, the metal sheet and the electromagnet on the surface of the inner layer cylinder in the pushing device are mutually and electromagnetically adsorbed, and the barrier block is pulled away from the supporting frame and is arranged on the surface of the supporting plate at the equal height position.
Further, the support is a lifting support, and is provided with a plurality of layers of detachable supporting plates, a separation blade is erected on the side surface of each layer of supporting plate, the supporting plates are nested in four vertical supporting columns and are installed at different heights of the supporting columns, the supporting plate at the lowest layer is provided with four double-layer cylindrical metal sleeves at the bottom and clings to the inner side of the supporting columns, and the inner layer sleeves are driven by a pneumatic booster pump to stretch and retract so as to adjust the height.
A method for testing the drive of car with different concave-convex obstacles includes such steps as digging a part of the road to be tested and its both sides to form concave-convex blocks with a certain area and depth, arranging a slide way in the concave-convex blocks, aligning the pulleys on the bottom plate of supporting frame to the transverse slot of slide way, arranging a replacing unit between the supporting frame and push unit, fixing the push unit to the position flush with the current height of supporting frame, and arranging the blocks in the concave-convex blocks to have the same depth as the thickness of the blocks, the bracket is arranged in a hollow on one side or two sides of the test road section, and the depth of the hollow enables the pushing device, the supporting plate opposite to the pushing device and the support frame to be flush with the current height; the support frame is provided with a plurality of frame bodies, the support frame is divided into a plurality of compartments by partition plates, barrier blocks are installed in the frame bodies of the support frames, barrier blocks loaded with original pavements are arranged in the barrier blocks, in a pavement simulation test, the support frame and the barrier blocks in the support frame are moved through a slide way, the needed frame bodies and the needed barrier blocks used for the test are moved to the slide way in the test road section, and after the test is finished, the support frame and the barrier blocks in the support frame are moved through the slide way, and the barrier blocks loaded with the original pavements are moved to the slide way in the test road section.
Furthermore, the method for moving the required obstacle block for the current test to the slide way in the test road section by moving the support frame and the obstacle block in the support frame through the slide way is as follows: the rotating lock catch of the support frame baffle is electrified through an asynchronous motor connected with a rotating shaft to rotate the rotating lock catch, so that ratchets of the rotating lock catch are not meshed with transverse ratchets of the slide way any more, and the locking between the support frame and the slide way is released; the asynchronous motor connected with the pulley of the bottom plate of the support frame through the rotating shaft is electrified to enable the support frame to transversely move in the transverse groove of the slideway, the asynchronous motor connected with the rotating lock catch of the baffle plate of the support frame is electrified to rotate the rotating lock catch so as to enable the ratchet of the rotating lock catch to be meshed with the transverse ratchet of the slideway, and the support frame and the slideway are locked.
Further, the method for installing the obstacle blocks in the support body of each support frame comprises the following steps: during the installation, the support frame that will install the obstacle piece removes to pusher's relative position through the slide, the support frame, the placing of support prepares obstacle piece layer board and pusher of installation at current high parallel and level, square telescopic inlayer section of thick bamboo is released by pneumatic booster pump, makes the obstacle piece roll-off layer board that is located the layer board, and in pushing the support body in the support frame, the top surface of obstacle piece, with the gyro wheel rolling contact of partition panel installation in the apex angle department of obstacle piece import side, and by the gyro wheel guide obstacle piece get into in the support frame.
Further, the method for unloading the obstacle blocks in the support body of the support frame comprises the following steps: the inner layer cylinder of the square sleeve is pushed out and is contacted with the barrier block by the front end face of the inner layer cylinder, the current is switched on at the same time, the electromagnet on the surface of the inner layer cylinder of the square sleeve generates strong magnetism, the side face, opposite to the baffle, of the barrier block is provided with a metal sheet, the electromagnet on the surface of the inner layer cylinder is interacted with the metal sheet and is adhered together by the magnetism, at the moment, the pneumatic booster pump works, the inner sleeve is recycled into the square sleeve, and the barrier block is pulled into a supporting plate of the support.
Furthermore, the method for replacing the barrier block by using the replacing device comprises the steps that the lifting support arranged in the hollow is driven by the pneumatic booster pump to enable the four double-layer cylindrical metal sleeves to stretch out and draw back, the height positions of the support plates which are positioned at different heights of the supporting columns are adjusted, the height of the support plate on which the barrier block to be replaced is positioned is adjusted, the support bodies of the support frames of the support plates, the pushing device and the slide way are aligned, and the barrier block on which the support plate is arranged in the support bodies of the support frames.
Furthermore, the transverse length of each barrier block is 3m, the thickness of each barrier block is 30cm, the protruding or recessed length of each hollow is not more than 30cm, the height of each baffle plate between the supporting plates of the lifting support is 32cm, and the barrier blocks are made of ABS engineering plastics.
Furthermore, a rubber band is used for simulating a marking line in the center of a real road surface on the obstacle block, the width of the rubber band is equivalent to that of the marking line on the road surface, the color of the rubber band is the same, the length of the rubber band is slightly longer than that of the guide rail, and the rubber band is fixed to A, B two sides through iron nails so as to be parallel to the road surface; during testing, the barrier blocks transversely move on the slide ways, and no matter the barrier blocks are locked at any position, a central marking line appears on a test road surface; when the protruding obstacle block passes through the central marking line, the marking line simulated by the rubber band can be deformed under the action of the protruding obstacle and stretched to the left side or the right side, and when the protruding obstacle is replaced or moved away, the marking line simulated by the rubber band can return to the original position due to elasticity.
Claims (5)
1. A concave-convex road surface simulation device for automobile testing is characterized by comprising a slideway, a support frame and an obstacle block; the slideway is a base with grooves, the bottom surface of the base is arranged on a test road surface, two parallel transverse grooves are formed in the top surface of the base, the two transverse grooves are longitudinally arranged, transverse ratchets are paved on the base part outside the transverse grooves, and the transverse length of the transverse ratchets is as long as or shorter than the grooves; the support frame comprises a plurality of drawer-shaped frame bodies which are transversely arranged and used for supporting the barrier blocks, the frame bodies are formed by surrounding and connecting a bottom plate, two partition plates and a baffle plate, the frame bodies are provided with top openings and barrier block inlets which are positioned on the side faces, the bottom plate is provided with two pulleys which move along the transverse grooves, the two pulleys are arranged in the two grooves, the two partition plates are arranged in the transverse direction of the bottom plate, and the baffle plate is arranged in the longitudinal direction of the bottom plate, is close to the ratchets and is opposite to the barrier block inlets; the outer plate surface of the baffle is provided with a rotary lock catch, and the peripheral surface of the lock catch body is provided with ratchets which can be meshed with the transverse ratchets; at least one side of the partition plate is provided with a roller at the vertex angle of the inlet side of the barrier block, and the top of the peripheral surface of the roller is higher than the upper edge of the partition plate; the top surface of the barrier block is a barrier surface, and the block part below the barrier surface is hollowed in the transverse direction, and the hollow parts enable the rollers at the top corners of the partition plates to be in rolling contact with the lower surface of the barrier surface;
the replacing device comprises a pushing device base and a square sleeve, the pushing device base is fixed at a height and faces to the barrier block in the bracket at the height, the square sleeve is of a double-layer barrel structure, the inner barrel is located inside the outer barrel and connected with the pneumatic booster pump, and the pneumatic booster pump is started to push the inner barrel out of the outer barrel, contact the barrier block on the supporting plate and move the inner barrel;
the support is a lifting support and is provided with a plurality of layers of detachable supporting plates, a baffle sheet is erected on the side face of each layer of supporting plate, the supporting plates are nested in four vertical supporting columns and are installed at different heights of the supporting columns, four double-layer cylindrical metal sleeves are arranged at the bottom of the supporting plate at the lowest layer and close to the inner sides of the supporting columns, and the inner layer sleeves are driven by a pneumatic booster pump to stretch and retract to adjust the height;
the surface of the inner layer sleeve is provided with an electromagnet which generates current when being electrified, the inner layer sleeve is pushed out by the outer layer sleeve by the pneumatic booster pump and is contacted with the side surface of the barrier block positioned in the support frame, the side surface is the side surface opposite to the baffle plate, the side surface of the barrier block is provided with a metal sheet, and the metal sheet and the electromagnet on the surface of the inner layer sleeve in the pushing device are mutually electromagnetically adsorbed so as to draw the barrier block away from the support frame.
2. The rough road surface simulation apparatus for automobile testing according to claim 1, wherein the rotary latch, a rotating shaft of the asynchronous motor is located therein, and a body of the asynchronous motor is connected with the baffle plate, and the rotating shaft of the asynchronous motor rotates to engage the ratchet teeth of the rotary latch with the ratchet teeth of the slide way.
3. The device for simulating an uneven road surface for automobile testing according to claim 1, wherein the pulleys of the bottom plate of the supporting frame are embedded, the upper half portion is embedded in the bottom plate of the supporting frame, and the lower half portion is placed in the transverse groove.
4. The rough road surface simulation apparatus for automobile testing according to claim 1, wherein the barrier blocks are used for simulating obstacles on a real road surface, different barrier blocks simulate different obstacles by recesses or protrusions with different areas and depths, and the thickness of the barrier blocks is larger than the heights of the partition plates and the baffles of the support frame; the thickness of the upper surface of the barrier block, which is higher than the baffle plate, is consistent with the thickness of the rotary lock catch and the ratchet on the slide way.
5. The device for simulating an uneven road surface for automobile testing according to claim 1, wherein the replacing device is located on one side of the slide way, the pusher base is fixed at a position having the same height as the barrier block mounted in the supporting frame, the bracket is located between the pusher base and the barrier block, the metal sheet and the electromagnet on the surface of the inner-layer cylinder in the pusher are electromagnetically adsorbed to each other, and the barrier block is drawn out of the supporting frame and placed on the surface of the supporting plate at the same height.
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| CN201910816278.9A CN112444404B (en) | 2019-08-30 | 2019-08-30 | A unsmooth road surface analogue means for automotive test |
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| CN112444404A (en) | 2021-03-05 |
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