CN114018590A - Test device and test method for simulating rain - Google Patents
Test device and test method for simulating rain Download PDFInfo
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- CN114018590A CN114018590A CN202111278981.2A CN202111278981A CN114018590A CN 114018590 A CN114018590 A CN 114018590A CN 202111278981 A CN202111278981 A CN 202111278981A CN 114018590 A CN114018590 A CN 114018590A
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- 238000012360 testing method Methods 0.000 title claims abstract description 98
- 238000010998 test method Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 121
- 238000004088 simulation Methods 0.000 claims abstract description 18
- 239000007921 spray Substances 0.000 claims description 58
- 239000011521 glass Substances 0.000 claims description 12
- 230000000007 visual effect Effects 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 abstract description 9
- 238000005507 spraying Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 230000001276 controlling effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000013100 final test Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012113 quantitative test Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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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
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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
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention relates to a test device for simulating rain and a test method thereof, wherein the test device comprises: a support bracket for securing to a vehicle; the supporting frame is provided with a mounting frame which can move along the vertical direction; the water tank is arranged on the support frame; the sprinkler is installed on the mounting frame and connected with the water tank, and a flow regulating valve is arranged between the sprinkler and the water tank. According to the test device and the test method for simulating the rain, provided by the embodiment of the invention, the flow of the water sprayer is controlled through the flow regulating valve, the rain state simulation with quantitative flow can be realized, the test device is arranged on a vehicle, a wind tunnel laboratory is not needed, the test cost is reduced, meanwhile, the test device can adapt to vehicles with different heights through the mounting rack with adjustable height, adapt to different vehicle speeds through the adjustment of the height of the mounting rack, the water of the water sprayer is reduced from falling out of the vehicle, and the rainfall simulation is closer to the actual working condition.
Description
Technical Field
The invention relates to the field of automobile testing, in particular to a test device for simulating rain and a test method thereof.
Background
At present, in order to ensure the safe driving of a vehicle in a rainy day, a water flow path outside a cab is planned, so that the water flow direction does not affect the visual field of a driver, and in order to test the effect of the water flow path planning of the cab, a rain test is performed on the vehicle so as to measure the actual visual field condition of the cab when the vehicle is in a rainy day.
In the correlation technique, in order to compare the actual effects of different schemes conveniently, the rainfall needs to be controlled to be consistent, the rainfall factor in the rainy day environment is complex and changeable, the rainfall cannot be controlled in the real situation, in order to keep the rainfall consistent, the working condition that the vehicle runs in the rainy day is often simulated by adopting an automobile wind tunnel test, and the actual rainfall is replaced by spraying the vehicle, so that the flow can be accurately controlled.
However, due to the fact that the design schemes of the vehicle are different during measurement and the working conditions required to be measured are different, dozens of working conditions need to be simulated before and after verification from the initial design to the final scheme, and the wind tunnel test is expensive, so that the test cost is increased sharply.
Disclosure of Invention
The embodiment of the invention provides a test device for simulating rain and a test method thereof, which aim to solve the problem that wind tunnel test in the related technology is expensive.
In a first aspect, a test device for simulating rain is provided, which includes: a support bracket for securing to a vehicle; the supporting frame is provided with a mounting frame which can move along the vertical direction; the water tank is arranged on the support frame; the sprinkler is installed on the mounting frame and connected with the water tank, and a flow regulating valve is arranged between the sprinkler and the water tank.
In some embodiments, the sprinkler includes a first spray head, a second spray head, and a third spray head; the first spray head is used for facing the front glass; the second spray head is used for facing a side window of the vehicle; the third spray head is used for facing the roof of the vehicle.
In some embodiments, the mount includes a support arm and a telescoping arm; the supporting arm is arranged on the supporting frame and can move along the width direction of the vehicle; the telescopic arm is mounted on the supporting arm, the telescopic arm can move along the driving direction of the vehicle, and the water sprayer is mounted on the telescopic arm.
In some embodiments, the sprinkler includes a first spray head; the telescopic boom is far away from a front mounting support is installed at one end of the support frame, the included angle between the front mounting support and the telescopic boom is adjustable, and the first spray head is installed on the front mounting support.
In some embodiments, the support arm comprises a second fixed arm and two first fixed arms, and the sprinkler comprises a second sprinkler head and a third sprinkler head; the two first fixing arms are positioned on two opposite sides of the second fixing arm and used for enabling the second spray head to face to a side window of the vehicle; the second fixing arm is used for installing the third spray head above the vehicle.
In some embodiments, the telescopic arm comprises a telescopic bracket and an adjusting bracket, the telescopic bracket is mounted on the supporting arm, the telescopic bracket can move along the driving direction of the vehicle, and the water sprayer is mounted on the adjusting bracket; one side of the telescopic support is rotatably connected with the adjusting support, the other side of the telescopic support is connected with the adjusting support through a telescopic rod, and the telescopic rod can adjust the included angle between the telescopic support and the adjusting support through stretching.
In some embodiments, a mounting groove is provided on the adjusting bracket, the sprinkler is mounted to the mounting groove, and the sprinkler is movable in the mounting groove.
In some embodiments, the support frame comprises a first pressing plate and a second pressing plate which are arranged oppositely, the distance between the first pressing plate and the second pressing plate is adjustable, and the first pressing plate and the second pressing plate are used for being clamped on a vehicle.
In a second aspect, a test method of a test device for simulating raining is provided, which is characterized by comprising the following steps: mounting the support frame on a vehicle; adjusting the height of the mounting frame to enable the distance between the mounting frame and the roof to meet the requirement of measuring the vehicle speed; turning on a water sprayer to spray water in the water tank to the cab; controlling the flow of the water sprayer to enable the flow of the water sprayer to meet the requirement of the test rainfall; and controlling the speed of the test vehicle to reach the measured speed, and recording test data.
In some embodiments, after the controlling the vehicle speed of the test vehicle to reach the measured vehicle speed and recording the test data, the method further comprises the following steps: according to the probability of the vehicle in use under different working conditions, weighting treatment is carried out on different test working conditions, so that the sum of the weights of all the working conditions is one; according to test data measured under different working conditions, scoring the rainy-day visual field characteristics under different working conditions to obtain the rainy-day visual field characteristic score corresponding to the working conditions; multiplying the rainy-day view characteristic score under each working condition by the weight of the corresponding working condition to obtain the weighted score of the corresponding working condition; and summing the weighted scores of all the working conditions to obtain the final score of the vehicle rainy-day visual field characteristic measurement.
The technical scheme provided by the invention has the beneficial effects that:
the embodiment of the invention provides a test device for simulating rain and a test method thereof, because a support frame can be arranged on a vehicle, a water tank and a mounting frame are arranged on the support frame, a water sprayer is arranged on the mounting frame, the rain simulation can be carried out on the vehicle through the water sprayer, compared with a wind tunnel test, the cost is greatly reduced, a flow regulating valve is arranged between the water sprayer and the water tank, the flow control of the water sprayer can be realized, the rain simulation test can be qualitatively and quantitatively carried out, different vehicles can carry out the test under the same flow, the reliability of test data is improved, the mounting frame provided with the water sprayer can move along the vertical direction, the rain simulation of the vehicles with different heights can be met, meanwhile, aiming at different working conditions of the same vehicle, the water sprayed by the water sprayer can be more fit with the actual rainfall, for example, the working condition with large vehicle speed, the height of the mounting frame is reduced, the water with the sprayer of exempting from drifts off outside the vehicle, causes the skew reality of simulation operating mode far away, consequently, both accessible the device realize the simulated rainfall of different operating modes, reduces the expense at wind tunnel test, and through the height of adjusting the mounting bracket, can adapt to different mounting height and measure the speed of a motor vehicle simultaneously, the water of reducible sprayer drifts off outside the vehicle, makes the rainfall simulation more press close to actual conditions.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a test apparatus for simulating raining according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first fixing arm according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a test device for simulating raining according to an embodiment of the present invention at a position of a water tank;
FIG. 4 is a schematic view of the front mounting bracket position;
FIG. 5 is a schematic view of the test apparatus viewed from the side and the rear;
FIG. 6 is a flow chart of a testing method of a testing device for simulating raining according to an embodiment of the present invention;
fig. 7 is a flowchart after step S5 in fig. 6.
In the figure:
1. a support frame; 2. a mounting frame; 3. a water tank; 4. a water sprayer; 5. a first nozzle; 6. a second nozzle; 7. a third spray head; 8. a support arm; 9. a telescopic arm; 10. a telescopic bracket; 11. adjusting the bracket; 12. mounting grooves; 13. a front mounting bracket; 14. a first fixed arm; 15. a second fixed arm; 16. a first platen; 17. a second platen; 18. a telescopic rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The embodiment of the invention provides a test device for simulating rain and a test method thereof, which can solve the problem of high cost of a wind tunnel test in the related technology.
Referring to fig. 1, 3 and 5, a test device for simulating raining according to an embodiment of the present invention may include: a support frame 1 for fixing to a vehicle; the support frame 1 can be provided with a mounting frame 2, and the mounting frame 2 can move along the vertical direction; the water tank 3, the water tank 3 can be installed on the supporting frame 1; the sprinkler 4, the sprinkler 4 can be installed on the mounting bracket 2, the sprinkler 4 is connected with the water tank 3, a flow regulating valve can be arranged between the sprinkler 4 and the water tank 3, namely, the sprinkler is installed on a vehicle through the supporting bracket 1, the testing device can move along with the vehicle, the vehicle can be drenched with rain when the vehicle runs, the mounting bracket 2 can be arranged on the top of the vehicle, the sprinkler 4 can spray water to a cab of the vehicle to realize the simulation of the rain, the flow regulating valve is arranged between the sprinkler 4 and the water tank 3, the flow control of the sprinkler 4 can be realized, so as to ensure that the flow sprayed to the cab can meet the flow regulation of the test, wherein, the sprinkler can run in rainy days by arranging a flow sensor on a vehicle body, the flow drops to the vehicle in rainy days, the flow is calibrated according to the calibrated flow regulating valve, the flow of the water sprayer 4 sprayed to the vehicle meets the actual rainy environment, the test environment is closer to the real rainy environment, qualitative and quantitative measurement can be realized, the mounting frame 2 can move along the vertical direction, the mounting frame 2 can adapt to cabs with different heights, meanwhile, the height of the mounting frame 2 can be adjusted according to different vehicle speeds of the same vehicle, so that water sprayed to the cabs by the water sprayer 4 under different vehicle speeds can fall on the corresponding position of the cab, the real rainy environment can be closer to, compared with a wind tunnel test, rain simulation under the vehicle driving state can be realized by the support frame 1 arranged on the vehicle, the wind tunnel test can not be adopted for simulation, the test cost is greatly reduced when the simulation of rain driving is completed, in addition, the test time field is more flexible, the test can be carried out immediately when the project needs are met, and the reservation and queuing of the cab are not required, the test time is saved, in the embodiment, the height of the mounting frame 2 is adjusted, the distance between the water outlet point of the water sprayer 4 and the top of the vehicle can be adjusted, the height adjustment range of the water outlet point is 100mm-300mm, when the speed of the test vehicle is high, the height of the water outlet point can be adjusted to be low, otherwise, when the speed of the test vehicle is low, the height of the water outlet point can be adjusted to be high through the mounting frame 2, and therefore the rainfall sprayed by the water sprayer 4 in a cab can meet the actual environment.
Referring to fig. 1, in some embodiments, sprinkler 4 may include a first sprinkler 5, a second sprinkler 6, and a third sprinkler 7; the first shower head 5 may be used to face the front glass of the vehicle; the second sprinkler 6 can be used for facing the side window of the vehicle; the third spray head 7 can be used for facing the roof of the vehicle, that is, the measuring device can spray water to the front glass of the vehicle through the first spray head 5 to meet the test evaluation of the front glass of the vehicle, can spray water to the side window of the vehicle through the second spray head 6 to meet the test evaluation of the side window of the vehicle and the rearview mirror beside the side window, can better simulate the actual rain by spraying water to the roof through the third spray head 7, can simulate the water flow from the roof to the front glass and the side window of the vehicle, can better simulate the actual rain by spraying to different positions of the cab, is consistent with the rain weather environment, the rain falling to the vehicle can cover the top and the side surface of the cab, can realize better simulation effect compared with the rain only to the front glass of the vehicle, in the embodiment, the first spray head 5, the second spray head 6 and the third spray head 7 are all spray heads arranged at intervals, and by controlling the intervals of the spray heads, the rain sprayed on the cab is more uniform.
Referring to fig. 1 and 5, preferably, the mounting frame 2 may include a support arm 8 and a telescopic arm 9; the supporting arm 8 can be arranged on the supporting frame 1, and the supporting arm 8 can move along the width direction of the vehicle; the telescopic arm 9 can be installed on the supporting arm 8, the telescopic arm 9 can move along the driving direction of the vehicle, the water sprayer 4 can be installed on the telescopic arm 9, that is, the support arm 8 can be used for adjusting the water sprayer 4 in the width direction of the vehicle, the telescopic arm 9 can be used for adjusting the water sprayer 4 in the length direction of the vehicle, through the adjustment in two directions, one mounting frame 2 can adapt to vehicles with different widths and lengths, the number of test devices is reduced, meanwhile, the test of the same vehicle at different speeds can be aimed at, the positions of the support arm 8 and the telescopic arm 9 can be adjusted, the position of the water sprayer 4 relative to the vehicle can be adjusted, the water flow sprayed by the water sprayer 4 at different speeds can be in accordance with the current rainfall, in the embodiment, the support arm 8 is sleeved on the support frame 1, the extension direction of the rod part is the width direction of the vehicle, the rod part loosens the support arm 8 and the support frame 1, the mounting position of the support arm 8 on the support frame 1 is adjusted again, so that the support arm 8 moves on the support frame 1 along the width direction of the vehicle, the telescopic arm 9 is sleeved on the support arm 8 with the extending direction being the vehicle running direction, similar to the support arm 8, the mounting position of the telescopic arm is adjustable, so that the telescopic arm 9 moves in the vehicle running direction, in other embodiments, the support arm 8 and the telescopic arm 9 can move in other manners, for example, a slide rail is arranged at the mounting position, or relatively moving parts are connected through a telescopic cylinder body to realize the movement of the support arm 8 and the telescopic arm 9, in the embodiment, the water outlet points of the water sprayers 4 at the left side and the right side can be positioned outside the vehicle by adjusting the support arm 8 and the telescopic arm 9, and the distance from the left-right symmetric center of the vehicle is 1500mm-1900mm, so that the spraying of most vehicles can be satisfied, the water outlet point at the foremost end can extend out of the vehicle by 300-500 mm through the telescopic arm 9 in the same way.
Referring to fig. 1 and 4, in some alternative embodiments, the sprinkler 4 may include a first nozzle 5; the end of the telescopic arm 9 far away from the support frame 1 can be provided with a front mounting bracket 13, the included angle between the front mounting bracket 13 and the telescopic arm 9 is adjustable, the front mounting bracket 13 can be provided with a first spray nozzle 5, that is, the front mounting bracket 13 far away from the end of the support frame 1 through the telescopic arm 9 fixes the first spray nozzle 5, so that the first spray nozzle 5 extends out of the front end of the vehicle, the spray of the first spray nozzle 5 to the front glass of the vehicle can be met, the adjustment of the water spray direction of the first spray nozzle 5 can be realized through the front mounting bracket 13 with the adjustable included angle and the telescopic arm 9, the spray of the front glass with different angles can be met, meanwhile, the current observation shows that the raindrops have different falling directions relative to the cab under different vehicle speeds, the water spray direction can be close to the actual rain state through the adjustment of the angle of the first spray nozzle 5, so that the simulation effect of the test device is better, in this embodiment, the first nozzles 5 mounted on the front mounting bracket 13 share one water supply pipeline, and the water supply pipeline is independent of the water supply pipelines of the water sprayers 4 at other positions, and the flow of the front mounting bracket 13 can be independently controlled to be close to actual rainfall, so that the rainfall of the front glass is higher than that of the side window of the vehicle.
Referring to fig. 1 and 2, in some alternative embodiments, the supporting arm 8 may include a second fixed arm 15 and two first fixed arms 14, and the sprinkler 4 may include a second sprinkler head 6 and a third sprinkler head 7; two first fixed arms 14 may be located on opposite sides of second fixed arm 15, first fixed arms 14 may be used to direct second spray head 6 towards the side window of the vehicle; the second fixing arm 15 can be used for installing the third spray head 7 above the vehicle, that is, the second spray head 6 can be arranged at two sides of the vehicle by the first fixing arms 14 arranged at two opposite sides of the second fixing arm 15, so that the second spray head 6 faces the side window of the vehicle, so that the spray of the side window of the vehicle and the rearview mirror can be realized, the third spray head 7 can be arranged above the roof by the second fixing arm 15 arranged at the middle position, so that the third spray head 7 can spray water to the roof, in the embodiment, three second fixing arms 15 arranged in parallel are arranged in the supporting arm 8, and two first fixing arms 14 respectively arranged at the left side and the right side of the vehicle, in other embodiments, the number of the second fixing arms 15 is not limited, the appropriate number of the second fixing arms 15 can be selected according to the spray range of the spray heads and the width of the test vehicle, or a plurality of the first fixing arms 14 can be arranged at one side of the vehicle, in this embodiment, the water flow pipelines of each support arm 8 are independent of each other, and the flow control valves can be arranged on different support arms 8 to accurately control the flow of the water sprayer 4 on each support arm 8.
Referring to fig. 1 and 2, in some alternative embodiments, the telescopic arm 9 may include a telescopic bracket 10 and an adjusting bracket 11, the telescopic bracket 10 may be mounted to the supporting arm 8, the telescopic bracket 10 may be movable in the traveling direction of the vehicle, and the sprinkler 4 may be mounted to the adjusting bracket 11; one side of the telescopic support 10 is rotatably connected with the adjusting support 11, the other side of the telescopic support 10 can be connected with the adjusting support 11 through a telescopic rod 18, the included angle between the telescopic support 10 and the adjusting support 11 can be adjusted through the telescopic rod 18, that is, the telescopic support 10 and the adjusting support 11 can rotate relatively, the angle adjustment of the telescopic support 10 and the adjusting support 11 can be realized through the telescopic rod 18 with the telescopic length, because the water sprayer 4 is arranged on the adjusting support 11, the adjustment of the spraying angle of the water sprayer 4 can be realized, so that the spraying direction of the water sprayer 4 can adapt to the actual rain spraying directions of different working conditions, in the embodiment, the telescopic rod 18 is a telescopic cylinder, in other embodiments, the telescopic rod 18 can also be an electric cylinder or other parts capable of realizing telescopic, in the embodiment, the adjusting support 11 of the second fixing arm 15 arranged on the top of the vehicle can enable the third spray head 7 to be downward substantially, and the adjusting bracket 11 on the first fixing arm 14 tilts the second spray head 6 substantially toward the center of the vehicle.
Referring to fig. 2, in some alternative embodiments, a mounting groove 12 may be disposed on the adjusting bracket 11, the water sprayer 4 may be mounted on the mounting groove 12, and the water sprayer 4 may move in the mounting groove 12, that is, the position of the water sprayer 4 may be adjusted by mounting the water sprayer 4 on the mounting groove 12, in this embodiment, each telescopic bracket 10 is mounted with a corresponding adjusting bracket 11, a plurality of water sprayers 4 are mounted on the mounting groove 12 of each adjusting bracket 11, and the distance between two adjacent water sprayers 4 may be kept consistent through the mounting groove 12, so as to achieve uniform flow rate in each area of the cab during spraying.
Referring to fig. 1 and 5, in some alternative embodiments, the supporting frame 1 may include a first pressing plate 16 and a second pressing plate 17 which are oppositely arranged, the distance between the first pressing plate 16 and the second pressing plate 17 is adjustable, and the first pressing plate 16 and the second pressing plate 17 can be used for clamping on the vehicle, that is, the supporting frame 1 is fixed on the vehicle through the first pressing plate 16 and the second pressing plate 17 which are oppositely arranged, and the distance between the first pressing plate 16 and the second pressing plate 17 is adjustable to adapt to installation positions with different widths, in this embodiment, the mounting frame 2 is provided with a clamping plate for fixing the supporting frame 1 on the vehicle and a clamping plate for fixing the water tank 3, wherein the clamping plates for fixing the supporting frame 1 on the vehicle are divided into two types, one type is fixed on the longitudinal beam of the vehicle and clings to the upper surface of the longitudinal beam through the first pressing plate 16, and the second pressing plate 17 clings to the lower surface of the longitudinal beam, the first pressing plate 16 is connected with the second pressing plate 17 through bolts, the distance between the first pressing plate 16 and the second pressing plate 17 is adjusted through the bolts, the test device can be mounted on a chassis vehicle, and the test device can be mounted on vehicles of different types through clamping plates of different types, wherein the first pressing plate is fixed at the front rail of a carriage.
Referring to fig. 6, a test method of a test device for simulating raining provided by the invention includes the following steps: s1: mounting the support frame 1 on a vehicle; s2: adjusting the height of the mounting rack 2 to enable the distance between the mounting rack 2 and the roof to meet the requirement of measuring the vehicle speed; s3: the water sprayer 4 is turned on, so that water in the water tank 3 is sprayed to the cab; s4: controlling the flow of the water sprayer 4 to enable the flow of the water sprayer to meet the requirement of the test rainfall; s5: controlling the vehicle speed of a test vehicle to achieve a measured vehicle speed, recording test data, namely, after a support frame 1 is installed on the vehicle, adjusting the height of an installation frame 2 on the support frame 1 to enable the installation frame 2 to be higher than the vehicle roof and the distance between the installation frame 2 and the vehicle roof to be matched with the measured vehicle speed, wherein the distance between the installation frame 2 and the vehicle roof can be calibrated in advance to ensure that the water sprayed by a water sprayer 4 is close to the actual rain-drenching state under different vehicle speeds, spraying the water of a water tank 3 to a cab through the water sprayer 4 to realize the simulation of rainy environment, controlling the flow of the water sprayer 4 to enable the spraying effect of the test device to be closer to the actual rain-drenching effect, satisfying the simulation of different rains, enabling a driver to drive the vehicle to achieve the measured vehicle speed, evaluating and recording the test data by related testers, realizing the simulation of the raining of different rains through controlling the flow of the water sprayer 4, through the test under the different speed of a motor vehicle, realize the measurement of more operating modes, compare and test at the rainy day directly, the ration of accessible controllable water sprayer 4 realization flow makes the experimental conclusion more convincing, compare at wind-tunnel test, because it can satisfy to spray the vehicle under the vehicle driving state, its test method can not rely on wind-tunnel laboratory, and the test cost greatly reduced has practiced thrift the test cost, has removed the restriction to the test field simultaneously, can be more nimble test the vehicle.
Referring to fig. 7, in some alternative embodiments, after step S5, the method further includes the following steps: s6: according to the probability that the vehicle is used under different working conditions, weighting processing is carried out on different test working conditions, the weight sum of all working conditions is one, for example, the weight sum of some vehicles cannot run at a high speed for a long time due to use requirements, the weight sum of some vehicles under the low-speed working conditions is higher, the weight sum of some vehicles under the high-speed working conditions is reduced, and the weight sum of some vehicles under the heavy rain environment can be properly reduced because some vehicles do not have the requirement of running under the heavy rain environment; s7: according to test data measured under different working conditions, the rainy day visual field characteristics of different working conditions are scored to obtain the rainy day visual field characteristic score of the corresponding working condition, in the embodiment, the concentration degree of water flow on the glass and the disappearance speed of the water flow are observed as judgment standards, and in order to obtain a more detailed scoring result, the front glass of the vehicle, the side window of the vehicle and the rearview mirror of the vehicle are scored respectively; s8: multiplying the rainy-day view characteristic score under each working condition by the weight of the corresponding working condition to obtain the weighted score of the corresponding working condition; s9: the weighted scores of all the working conditions are summed to obtain the final score of the field of view characteristics of the measured vehicle in rainy days, namely, the probability of running of the vehicle under different working conditions is different according to different using environments of different vehicles, the scoring weights of different working conditions are determined according to the probability of running under different working conditions, the weight of a scene with high using probability is higher, and the final test evaluation is more in line with the actual requirements of customers.
The principle of the test device and the test method for simulating rain provided by the embodiment of the invention is as follows:
because the mounting frame 2 is provided with the support frame 1, the support frame 1 can move along the vertical direction, the water sprayers 4 arranged on the mounting frame 2 can be arranged at the tops of vehicles with different heights, water in the water tank 3 is sprayed to a cab, the height of the water sprayers 4 from the roof can be adjusted through the mounting frame 2 with adjustable height, the rainfall test under different vehicle speeds can be adapted, the rainfall simulation is realized, a flow regulating valve is arranged between the water tank 3 and the water sprayers 4, the flow of the water sprayers 4 is controlled through the flow regulating valve, the rainfall environment with different rainfall can be simulated, compared with the direct rain test, the flow can be controlled, the qualitative and quantitative test can be realized by comparing the visual field performance of different vehicles under the same flow, compared with the wind tunnel test, the test device avoids using a wind tunnel laboratory, the test cost is reduced, and simultaneously the test field is not limited, more flexible testing can be achieved.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is to be noted that, in the present invention, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a test device of simulation rain, its characterized in that, it includes:
a support frame (1) for fixing to a vehicle; the supporting frame (1) is provided with a mounting frame (2), and the mounting frame (2) can move along the vertical direction;
the water tank (3), the said water tank (3) is mounted to the said supporting arm (1);
the water sprayer (4), the water sprayer (4) install in mounting bracket (2), water sprayer (4) with water tank (3) link to each other, water sprayer (4) with be provided with flow control valve between water tank (3).
2. A test rig for simulating rain according to claim 1, wherein:
the water sprayer (4) comprises a first spray head (5), a second spray head (6) and a third spray head (7);
the first spray head (5) is used for facing the front glass of the vehicle;
the second spray head (6) is used for facing a side window of the vehicle;
the third spray head (7) is used for facing the roof of the vehicle.
3. A test rig for simulating rain according to claim 1, wherein:
the mounting rack (2) comprises a supporting arm (8) and a telescopic arm (9);
the supporting arm (8) is arranged on the supporting frame (1), and the supporting arm (8) can move along the width direction of the vehicle;
the telescopic arm (9) is mounted on the supporting arm (8), the telescopic arm (9) can move along the driving direction of the vehicle, and the water sprayer (4) is mounted on the telescopic arm (9).
4. A test rig for simulating rain according to claim 3, wherein:
the sprinkler (4) comprises a first nozzle (5);
the telescopic arm (9) is far away from the one end of the support frame (1) is provided with a front mounting bracket (13), the front mounting bracket (13) is adjustable in included angle between the telescopic arms (9), and the first spray head (5) is arranged on the front mounting bracket (13).
5. A test rig for simulating rain according to claim 3, wherein:
the supporting arm (8) comprises a second fixing arm (15) and two first fixing arms (14), and the water sprayer (4) comprises a second spray head (6) and a third spray head (7);
the two first fixing arms (14) are positioned at two opposite sides of the second fixing arm (15), and the first fixing arms (14) are used for enabling the second spray head (6) to face a side window of a vehicle;
the second fixing arm (15) is used for installing the third spray head (7) above a vehicle.
6. A test rig for simulating rain according to claim 3, wherein:
the telescopic arm (9) comprises a telescopic support (10) and an adjusting support (11), the telescopic support (10) is mounted on the supporting arm (8), the telescopic support (10) can move along the driving direction of a vehicle, and the water sprayer (4) is mounted on the adjusting support (11);
one side of telescopic bracket (10) with adjust support (11) and rotate and connect, the opposite side of telescopic bracket (10) pass through telescopic link (18) with adjust support (11) and connect, through flexible telescopic link (18) are adjustable telescopic bracket (10) with adjust the contained angle between support (11).
7. A test rig for simulating rainfall as claimed in claim 6, wherein:
the adjusting support (11) is provided with a mounting groove (12), the water sprayer (4) is mounted in the mounting groove (12), and the water sprayer (4) can move in the mounting groove (12).
8. A test rig for simulating rain according to claim 1, wherein:
the supporting frame (1) comprises a first pressing plate (16) and a second pressing plate (17) which are arranged oppositely, the distance between the first pressing plate (16) and the second pressing plate (17) is adjustable, and the first pressing plate (16) and the second pressing plate (17) are used for being clamped on a vehicle.
9. A test method using the test device according to claim 1, characterized in that it comprises the steps of:
mounting the support frame (1) on a vehicle;
adjusting the height of the mounting rack (2) to enable the distance between the mounting rack (2) and the roof to meet the requirement of measuring the vehicle speed;
the water sprayer (4) is turned on, so that water in the water tank (3) is sprayed to the cab;
controlling the flow of the water sprayer (4) to enable the flow of the water sprayer (4) to meet the requirement of the test rainfall;
and controlling the speed of the test vehicle to reach the measured speed, and recording test data.
10. The test method of claim 9, after controlling the vehicle speed of the test vehicle to the measured vehicle speed and recording the test data, further comprising the steps of:
according to the probability of the vehicle in use under different working conditions, weighting treatment is carried out on different test working conditions, so that the sum of the weights of all the working conditions is one;
according to test data measured under different working conditions, scoring the rainy-day visual field characteristics under different working conditions to obtain the rainy-day visual field characteristic score corresponding to the working conditions;
multiplying the rainy-day view characteristic score under each working condition by the weight of the corresponding working condition to obtain the weighted score of the corresponding working condition;
and summing the weighted scores of all the working conditions to obtain the final score of the vehicle rainy-day visual field characteristic measurement.
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| CN202111278981.2A CN114018590A (en) | 2021-10-31 | 2021-10-31 | Test device and test method for simulating rain |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111278981.2A CN114018590A (en) | 2021-10-31 | 2021-10-31 | Test device and test method for simulating rain |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118090061A (en) * | 2024-04-28 | 2024-05-28 | 山东智宏新材料科技有限公司 | Tightness detection device for aluminum alloy door and window |
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