CN113820269B - Road surface function rapid tester - Google Patents
Road surface function rapid tester Download PDFInfo
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- CN113820269B CN113820269B CN202111147733.4A CN202111147733A CN113820269B CN 113820269 B CN113820269 B CN 113820269B CN 202111147733 A CN202111147733 A CN 202111147733A CN 113820269 B CN113820269 B CN 113820269B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0228—Low temperature; Cooling means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/023—Pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0244—Tests performed "in situ" or after "in situ" use
- G01N2203/0246—Special simulation of "in situ" conditions, scale models or dummies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0298—Manufacturing or preparing specimens
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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Abstract
The invention provides a rapid tester for road surface functions, which comprises an environment box, a test piece placing platform, a loading control device and a control console, wherein a temperature regulator and a humidity regulator are arranged in the environment box, a water injection hole and a water drainage hole are formed in the environment box, the test piece placing platform is arranged in the environment box, a test piece is arranged on the test piece placing platform, the loading control device is arranged above the test piece placing platform and comprises a pressurizing mechanism, a lifting rod and a test wheel set, the pressurizing mechanism provides pressure for the lifting rod and drives the lifting rod to lift, a rotating motor is arranged at the bottom of the lifting rod and drives the test wheel set to rotate through the rotating motor, a rotating turn number sensor, a speed sensor and an acceleration sensor are arranged on the test wheel, and the control console is arranged outside the environment box.
Description
Technical Field
The invention relates to the technical field of road engineering, in particular to a rapid tester for a road surface function.
Background
With the rapid development of the construction of transportation infrastructures and automobile reserves in China, about 20 thousands of traffic accidents occur every year in China, wherein the proportion of road safety accidents caused by motor vehicles reaches more than 90%. The method is irrelevant to the lack of effective means for detecting the safety of road surface functions in the road traffic infrastructure in China.
At present, the development of a method for detecting the quality and the structural function of road surface materials such as a road surface, an airport pavement, a racing track and the like and a related test device are relatively perfect, however, in the related technology, a functional detection device for the road surface is not provided, the braking conditions of vehicles, airplanes and the like under different environments and surface layer material conditions cannot be simulated, the braking distance and the braking time of the vehicles, the airplanes and the like cannot be measured, the abrasion degree of the road surface, the durability of the road surface materials and the like cannot be detected, if the experiment is carried out on the problems of the braking distance, the skid resistance and the like related to the driving safety on an actual road, time and labor are wasted, the driving of other vehicles is influenced, and safety accidents are easy to occur.
Disclosure of Invention
In view of the shortcomings of the prior art, it is an object of the present invention to provide a rapid tester for road surface functions, which can simulate the braking condition of a vehicle or an airplane, measure the braking distance and the braking time, and detect the degree of wear of a road surface and the degree of durability of a road surface material.
In order to solve the technical problems, the invention adopts the technical scheme that:
the utility model provides a road surface function rapid tester which characterized in that: comprises an environment box, a test piece placing platform, a loading control device and a control console;
a temperature regulator and a humidity regulator are arranged in the environment box, a water injection hole and a water drain hole are arranged on the environment box, and the water injection hole and the water drain hole can be plugged tightly through a plug;
the test piece placing platform is arranged in the environment box, the test piece is arranged on the test piece placing platform, and a buckle is arranged on the test piece placing platform and used for clamping the test piece;
the loading control device is arranged above the test piece placing platform and comprises a pressurizing mechanism, a lifting rod and a test wheel set, the top of the lifting rod is connected with the pressurizing mechanism, the pressurizing mechanism provides pressure for the lifting rod and drives the lifting rod to lift, a rotating motor is arranged at the bottom of the lifting rod, the test wheel set comprises a wheel shaft and test wheels, the two test wheels are arranged on two sides of the wheel shaft, tires are arranged on the test wheels, a brake mechanism is arranged in each test wheel, an output shaft of the rotating motor is connected with the wheel shaft, the test wheel set is driven to rotate through the rotating motor, and a rotating turn number sensor, a speed sensor and an acceleration sensor are arranged on each test wheel;
the control console is arranged outside the environment box and used for controlling the temperature regulator, the humidity regulator, the pressurizing mechanism and the rotating motor to work and collecting data of the rotating turn number sensor, the speed sensor and the acceleration sensor.
Furthermore, the test wheel comprises an outer wheel and an inner wheel, the inner wheel is fixed on the inner side of the outer wheel, the tire is sleeved on the outer wheel, and the brake mechanism is arranged on the inner wheel.
Furthermore, the brake mechanism comprises a brake pad and a brake groove, the brake pad is clamped on the inner wheel, the brake groove is fixed on the brake pad, a pushing piece is arranged on the brake groove, and the pushing piece is used for pushing the brake pad to clamp the inner wheel.
Further, a plurality of sensor placing holes are formed in the environment box, and the sensor placing holes can be plugged through plugs.
Further, the environment box is of a rectangular cavity structure formed by a top plate, 4 side plates and a bottom plate, and rollers are arranged at the bottom of the bottom plate.
Furthermore, the environment box is provided with an observation door, the observation door is provided with an observation window, the test piece placing platform and the bottom of the observation window are on the same horizontal plane, and the observation window is provided with a vertical scale.
Further, the environment box is internally provided with a base, the base is provided with a sliding guide groove, a positioning baffle and a positioning fastener, the test piece placing platform is arranged on the sliding guide groove and clamped on the front side of the test piece placing platform through the positioning baffle, and the positioning fastener is clamped on the rear side of the test piece placing platform.
Furthermore, a positioning plate is arranged on the test piece placing platform, and the buckle is arranged on the positioning plate.
Further, the test piece is used as a material for manufacturing a road surface, a pavement or a track surface.
Furthermore, the pressurizing mechanism provides pressure for the lifting rod through a hydraulic device and drives the lifting rod to lift, and the pushing piece is a hydraulic rod.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the rapid tester for the road surface function has wide application, can be used for testing the functionality and the safety of a series of road surface layers with the tire function, such as roads, airport runways, racetracks and the like, has no hard requirement on the composition materials of test pieces, and is suitable for all road surface or pavement materials which can be manufactured and molded and meet the test requirement size.
2. The rapid tester for the road surface function has comprehensive functions, and the loading control device can adjust the pressurizing size, test the rotating speed of the wheel set and the braking force, and can comprehensively simulate various states of different vehicles in the driving process or the taking-off and landing process of an airplane; the arrangement of the environment box enables the device disclosed by the invention to automatically adjust the test working condition, simulate the test environment under different temperatures, humidity, different water accumulation degrees and even road icing conditions and fit the actual service environment to the maximum extent; simultaneously, this device can be used to the test piece destruction test, and the test piece after the destruction can be taken out and be used for carrying out other structures and material test detection.
3. The rapid tester for the road surface function fills the blank of detection of the road surface functionality and the safety in China, and is beneficial to reducing the potential safety hazards of driving on roads, racing tracks and airport pavement.
Drawings
FIG. 1 is a schematic view of the overall structure of the rapid evaluation device for road surface functions according to the present invention.
FIG. 2 is an exploded view of the rapid evaluation device for road surface function according to the present invention.
FIG. 3 is a schematic view of the loading control device of the present invention.
FIG. 4 is a schematic view of a specimen placement platform of the present invention.
FIG. 5 is a schematic view of a retaining clip of the present invention.
FIG. 6 is a schematic view of a test wheel set of the present invention.
FIG. 7 is a schematic view of the braking mechanism of the present invention.
FIG. 8 is a schematic view of the connection of the brake mechanism of the present invention to the test wheel.
FIG. 9 is a schematic view of a specimen placement platform of the present invention.
Wherein: 1-a pressurizing mechanism; 2-a lifting rod; 3-a top plate; 4-a test wheel set; 5-a brake groove; 6-wheel shaft; 7-test wheel rotation direction; 8-a bottom plate; 9-a sliding guide groove; 10-a test piece placing platform; 11-a movable positioning plate; 12-positioning a baffle; 13-test piece; 14-a knob; 15-positioning grooves; 16-a positioning fastener; 17-rut marks; 18-a hydrophobic tank; 19-side plates; 20-a door frame; 21-an observation window; 22-a handle; 23-a base; 24-a loading control device; 25-scale bar; 26-a sponge plug; 27-a sensor; 28-sensor leads; 29-control buttons; 30-a console; 31-a roller; 32-a base; 33-a drain pipe; 34-an environmental chamber; 35-a brake mechanism; 36-a ball bearing; 37-a sleeve; 38-inner wheel; 39-brake pad; 40-a fixed positioning plate; 41-adjusting plate; 42-sliding guide rail.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
A rapid tester for road surface function, as shown in fig. 1-9, comprises an environmental chamber 34, a test piece placement platform 10, a loading control device 24 and a control console 30.
As shown in fig. 1, the environment box 34 is used for constructing an experimental environment, the environment box 34 provides a heat preservation, moisture preservation and water immersion environment, a temperature regulator and a humidity regulator are arranged in the environment box 34, a water injection hole and a water drainage hole are arranged on the environment box 34, the water injection hole and the water drainage hole can be tightly plugged by a plug, and the plug can be a sponge plug 26;
as shown in fig. 4, the test piece placement platform 10 is used for placing a test piece 13 to be tested, the test piece placement platform 10 is arranged in the environment box 34, the test piece 13 is arranged on the test piece placement platform 10, and a buckle is arranged on the test piece placement platform 10 and used for clamping the test piece 13;
as shown in fig. 2 and 3, the loading control device 24 is used for applying pressure to the test piece 13, driving the test piece 13 to rotate and braking the test piece 13, and simulating braking conditions of wheels and airplane wheels, the loading control device 24 is arranged above the test piece placing platform 10, the loading control device 24 comprises a pressurizing mechanism 1, a lifting rod 2, a rotating motor and a test wheel set 4, the top of the lifting rod 2 is connected with the pressurizing mechanism 1, the pressurizing mechanism 1 provides pressure to the lifting rod 2 and drives the lifting rod 2 to lift, the bottom of the lifting rod 2 is provided with the rotating motor, the test wheel set 4 comprises a wheel shaft 6 and test wheels, the two test wheels are arranged on two sides of the wheel shaft 6, tires are arranged on the test wheels, a brake mechanism 35 is arranged in each test wheel, an output shaft of the rotating motor is connected with the wheel shaft 6, the test wheel set 4 is driven to rotate by the rotating motor, and the test wheels are provided with a rotating turn number sensor 27, a speed sensor 27 and an acceleration sensor 27;
as shown in fig. 1 and 2, a console 30 is provided outside the environmental chamber 34 for controlling the operation of the temperature regulator, the humidity regulator, the pressurizing mechanism 1 and the rotating motor and collecting data of the rotation number sensor 27, the speed sensor 27 and the acceleration sensor 27, and a plurality of control buttons 29 are provided on the console 30.
In the process of quickly detecting the road surface function, a molded test piece 13 is placed on the test piece placing platform 10, and the test piece 13 is clamped through a buckle; injecting water to the environment box 34 to a target water level through a water injection hole and a water discharge hole according to experimental requirements, adjusting the temperature in the environment box 34 through a temperature adjuster, adjusting the humidity in the environment box 34 through a humidity adjuster, setting a pressure value pressurized by the pressurizing mechanism 1 and the rotation speed of an output shaft of the rotating motor, and starting an experiment after the experiment is ready; starting the pressurizing mechanism 1, driving the test wheel set 4 to rotate by rotating the motor, enabling the test wheel set 4 to rotatably descend onto the test piece placing platform 10 in a starting state of the rotating motor, applying pressure to the test wheel set 4, driving the test wheel set 4 to rotate by rotating the motor, enabling two test wheels on two sides of the test wheel set 4 to start acting on the surface of the test piece 13, performing brake control by a brake mechanism 35 according to an experiment requirement after a period of time, stopping the rotating motor after the test wheel set 4 brakes, enabling the test wheels to generate rut marks 17, and recording the time of braking, the brake distance and the brake acceleration; after the test is finished, draining water in the environment box 34 through the drain holes, taking out the test piece 13, wherein the test piece 13 after the test can be used for researching the surface rutting depth and the damage condition; the test piece 13 of the same type is tested for a plurality of times by changing the temperature adjusted by the temperature adjuster, the humidity adjusted by the humidity adjuster, the pressure applied by the pressurizing mechanism 1, the rotating speed of the rotating motor driving test wheel set 4 and the tire on the test wheel, and the road surface functional performance is obtained.
The invention can be used for quickly detecting the surface function of the road when a vehicle runs or an airplane takes off and lands to slide, and meets the requirements of different road surfaces on anti-skid and anti-abrasion quick detection under different environmental temperatures and dry and wet working conditions.
As shown in fig. 2, in order to move the test piece placement platform 10 conveniently, the environment box 34 is of a rectangular cavity structure formed by the top plate 3, the 4 side plates 19 and the bottom plate 8, the water injection holes and the water drain holes are all formed in the side plates 19 and can be sealed through the sponge plugs 26 so as to ensure the sealed environment of the environment box 34, and the bottom of the bottom plate 8 is provided with a plurality of rollers 31 for facilitating the movement of the rapid road surface function tester.
In the invention, in the test process, in order to obtain the surface function of the road surface material, a plurality of tests are carried out on one type of test piece 13, the test piece 13 of the same type is cut into the same size, so that the accurate test result can be conveniently obtained, and meanwhile, the test piece 13 is also conveniently placed on the test piece placing platform 10, the length of the test piece 13 is 300mm, the width of the test piece is 300mm, and the height of the test piece is 40-100mm.
The pressurizing mechanism 1 is provided through a hydraulic device, so that the pressurizing mechanism 1 can provide pressure for the lifting rod 2 and drive the lifting rod 2 to lift, the height of the test piece 13 can be changed, the test piece 13 is conveniently placed and pressure is applied to the test piece 13, a pressure sensor 27 is arranged at the bottom of the lifting rod 2, and the pressure is conveniently controlled. During the test, the pressurizing mechanism 1 drives the lifting rod 2 to extend until the test wheel is connected with the surface of the test piece 13, and simultaneously, the test wheel is rolled on the surface of the test piece 13 under the action of vertical pressure and rotation torque 7, so that the rolling condition of a wheel or an airplane wheel is simulated. The rotating speed of the test wheel is determined by the rotating speed generated by the torque 7, and the test wheel is used for simulating the action of the test wheel on a road surface, a runway or an airport pavement under different axle weights, loads and speeds. The distance between the two test wheels on the test wheel set 4 is 250-270mm, the length of the wheel shaft 6 is 290-310mm, and the diameter is not more than 30mm, so that the test wheels can fall on the surface of the test piece 13 and cannot deviate from the test piece 13 when rotating, the diameter of the test wheels is recommended to be 150-160mm, the test wheels have certain weight, and a counting device, a speed and acceleration sensor 27 are arranged in each test wheel, so that the change of the number of rotation turns, the speed and the acceleration in the test process of the test wheels can be recorded.
As shown in fig. 3, the test wheel set 4 is driven by the rotating motor to rotate in the test wheel rotating direction 7, the test wheel set 4 comprises a wheel shaft 6 and test wheels, the two test wheels are arranged on two sides of the wheel shaft 6, tires are arranged on the test wheels, a brake mechanism 35 is arranged in each test wheel, an output shaft of the rotating motor is connected with the wheel shaft 6, and the test wheel set 4 is driven by the rotating motor to rotate so as to simulate the rolling of wheels or airplane wheels.
Specifically, as shown in fig. 6-8, a sleeve 37 is provided on the wheel shaft 6, the sleeve 37 is fixed to the output shaft of the rotating motor, the test wheel includes an outer wheel and an inner wheel 39, the inner wheel 39 is fixed to the inner side of the outer wheel, the tire is sleeved on the outer wheel, and the brake mechanism 35 is provided on the inner wheel 39. Balls 36 are provided between the axle 6 and the outer wheel for the sensitivity of the outer wheel to roll.
As shown in fig. 6-8, the brake mechanism 35 includes a brake block 39 and a brake slot 5, the brake block 39 is clamped on the inner wheel 39, the brake slot 5 is fixed on the brake block 39, and the brake slot 5 is provided with a pushing member for pushing the brake block 39 to clamp the inner wheel 39. The inner wheel 39 and the outer wheel form a whole and rotate together, the brake block 39 is virtually buckled on the inner wheel 39, when the pushing piece pushes the brake block 39 to tightly clamp the inner wheel 39, the braking of the wheel and an airplane wheel can be simulated, and the tire of the test wheel group 4 can be replaced according to the test requirement to simulate different types of wheels or airplane wheels.
As shown in fig. 1 and 2, the environmental chamber 34 is provided with a plurality of sensor holes, the sensors 27 are respectively placed in the plurality of sensor holes, and the sensors 27 are connected to the console 30 through sensor leads 28, such as a noise sensor, a humidity sensor and a temperature sensor, so as to facilitate noise monitoring, temperature monitoring and humidity monitoring in subsequent tests.
As shown in fig. 1 and 2, the environment box 34 is a rectangular cavity structure, the environment box 34 is provided with a door frame 20, the door frame 20 is provided with an observation door, the observation door is provided with a handle 22, the observation door is provided with an observation window 21, the bottoms of the test piece placement platform 10 and the observation window 21 are on the same horizontal plane, and the observation window 21 is provided with a vertical scale 25.
As shown in fig. 2 and 4, a base 23 is arranged in the environment box 34, a sliding guide groove 9, a positioning baffle 12 and a positioning fastener 16 are arranged on the base 23, the test piece placement platform 10 is arranged on the sliding guide groove 9 and tightly clamps the rear side of the test piece placement platform 10 through the positioning baffle 12, a sliding guide rail 42 clamped on the sliding guide groove 9 is arranged at the bottom of the test piece placement platform 10, a positioning groove 15 is arranged at the side edge of the sliding guide groove 9, the positioning fastener 16 slides in the positioning groove 15 and tightly clamps the front side of the test piece placement platform 10, a drain groove 18 is arranged on the base 23, so that water can be drained conveniently, and a drain hole is arranged below the drain groove 18.
Be equipped with the locating plate on test piece place the platform 10, the buckle is established on the locating plate for block test piece 13.
In the invention, the size of the test piece placing platform 10 is 400 multiplied by 20mm, a rectangular test piece area is defined by three fixed positioning plates 40 and one movable positioning plate 11 in the center of the test piece placing platform 10 and is used for placing a test piece 13, the size of the test piece area is 302 multiplied by 302mm (the test piece 13 is allowed to have an error within 2 mm), the height of the positioning plate is not more than 20mm, a buckle is a knob 14 penetrating through the movable positioning plate 11, and when the test piece 13 is placed in the test piece area, the buckle is rotated to press the movable positioning plate 11 tightly, so that the test piece 13 is completely fixed.
Specifically, the buckle is the locking screw, compresses tightly test piece 13 through the locating plate, and the locking screw passes the locating plate 11 of fixed plate chucking activity, and then chucking test piece 13.
The test piece 13 is a material used for making a road surface, a pavement surface, or a racetrack surface.
The application process of the rapid tester for road surface function, as shown in fig. 1-9, includes:
step S1, placing a molded test piece 13 on a test piece placing platform 10, and clamping the test piece 13 through a buckle;
s2, injecting water into the environment box 34 to a target water level through a water injection hole and a water discharge hole according to experiment requirements, adjusting the temperature in the environment box 34 through a temperature regulator, and adjusting the humidity in the environment box 34 through a humidity regulator;
s3, setting a pressure value pressurized by the pressurizing mechanism 1 and the rotating speed of the output shaft of the rotating motor, and starting a test after the pressure value and the rotating speed are ready;
s4, starting a pressurizing mechanism 1, driving a test wheel set 4 to rotate by rotating a motor, enabling the test wheel set 4 to rotate and descend onto a test piece placing platform 10, applying pressure to the test wheel set 4, driving the test wheel set 4 to rotate by rotating the motor, enabling two test wheels on two sides of the test wheel set 4 to start acting on the surface of a test piece 13, performing brake control through a brake mechanism 35 according to experiment requirements after a period of time, stopping the motor after the test wheel set 4 brakes, enabling the test wheels to generate rut marks 17, and recording the brake time, brake distance and brake acceleration;
s5, after the test is finished, draining water in the environment box 34 through the drain holes, taking out the test piece 13, wherein the test piece 13 after the test can be used for researching the surface rutting depth and the damage condition;
and S6, testing the same type of test piece 13 for multiple times by changing the temperature adjusted by the temperature adjuster, the humidity adjusted by the humidity adjuster, the pressure applied by the pressurizing mechanism 1, the rotating speed of the rotating motor driving test wheel set 4 and the tire on the test wheel, and obtaining the road surface functional performance.
And S7, after the test is stopped, adjusting the temperature in the environment box 34 to normal temperature through the temperature regulator, opening the drain hole to drain the water in the environment box 34, taking out the test piece 13, observing the surface damage condition of the test piece, and using the test piece for further tests, such as surface structure depth test.
In step S1, the test piece 13 may be an asphalt concrete pavement layer test piece made of any material. It should be noted here that, if the cement concrete test piece is subjected to necessary curing, the test of the present invention can be performed after the expected test conditions are achieved.
In step S2, if a low-temperature environment in winter needs to be simulated, a water pipe is extended to inject water into the environment box 34, the water discharge pipe 33 is opened, the water level is repeatedly adjusted according to the scale 25 until the water level is about 2mm higher than the surface of the test piece 13, then the water injection hole and the water discharge hole are blocked through the sponge plug 26, the temperature control switch is turned on, the experimental environment temperature of 0-5 ℃ is set, and a period of time is waited until a thin ice film is condensed on the surface of the test piece 13. If the experimental conditions change, such as a summer high temperature environment or a rainy day immersion environment needs to be tested, the temperature, humidity and water level in the environmental chamber 34 need to be adjusted according to the specific experimental conditions.
In step S4, since the test object of the present invention is to determine the anti-skid performance and the anti-abrasion performance of the road surface, when the driving distance of the test wheel reaches the test requirement (e.g., 20 km) and the driving speed reaches the designed speed per hour (e.g., 40 km/h), the brake mechanism 35 is turned on, the target braking force is applied, and the rotating motor is turned off, so that the test wheel set 4 generates translational friction on the surface of the test piece 13 until the test piece stops moving, and the number of horizontal rotation turns, the speed change and the acceleration of the test wheel during the process from the start of braking to the stop of the test wheel are obtained, thereby calculating the braking distance of the road surface under the designed speed per hour condition in the test state. Meanwhile, the noise sensor synchronously records the noise level condition in the test process, and the noise level condition is collected and displayed by the control console 30.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. The utility model provides a road surface function rapid tester which characterized in that: comprises an environment box, a test piece placing platform, a loading control device and a control console;
a temperature regulator and a humidity regulator are arranged in the environment box, a water injection hole and a water drain hole are arranged on the environment box, and the water injection hole and the water drain hole can be plugged tightly through a plug;
the test piece placing platform is arranged in the environment box, the test piece is arranged on the test piece placing platform, and a buckle is arranged on the test piece placing platform and used for clamping the test piece;
the loading control device is arranged above the test piece placing platform and comprises a pressurizing mechanism, a lifting rod and a test wheel set, the top of the lifting rod is connected with the pressurizing mechanism, the pressurizing mechanism provides pressure for the lifting rod and drives the lifting rod to lift, a rotating motor is arranged at the bottom of the lifting rod, the test wheel set comprises a wheel shaft and test wheels, the two test wheels are arranged on two sides of the wheel shaft, tires are arranged on the test wheels, a brake mechanism is arranged in each test wheel, an output shaft of the rotating motor is connected with the wheel shaft, the test wheel set is driven to rotate through the rotating motor, a rotating turn number sensor, a speed sensor and an acceleration sensor are arranged on each test wheel, each test wheel comprises an outer wheel and an inner wheel, the inner wheel is fixed on the inner side of the outer wheel, each tire is sleeved on the outer wheel, the brake mechanism is arranged on the inner wheel, each brake mechanism comprises a brake pad and a brake groove, each brake pad is clamped on the inner wheel, the brake groove is fixed on the brake pad, and is used for pushing the brake pad to clamp the inner wheel;
the control console is arranged outside the environment box and used for controlling the temperature regulator, the humidity regulator, the pressurizing mechanism and the rotating motor to work and collecting data of the rotating turn number sensor, the speed sensor and the acceleration sensor;
in the process of quickly detecting the road surface function, a molded test piece is placed on the test piece placing platform, and the test piece is clamped through a buckle; injecting water to the environment box to a target water level through a water injection hole and a water discharge hole according to experiment requirements, adjusting the temperature in the environment box through a temperature adjuster, adjusting the humidity in the environment box through a humidity adjuster, setting a pressure value pressurized by a pressurizing mechanism and the rotating speed of an output shaft of a rotating motor, and starting an experiment after the experiment is ready; starting a pressurizing mechanism, driving a test wheel set to rotate by rotating a motor, enabling the test wheel set to rotationally fall onto a test piece placing platform in a starting state of the rotating motor, applying pressure to the test wheel set, driving the test wheel set to rotate by rotating the motor, enabling two test wheels on two sides of the test wheel set to start acting on the surface of a test piece, performing brake control by a brake mechanism according to experimental requirements after a period of time, stopping the rotating motor after the test wheel set brakes, enabling the test wheels to generate rut marks, and recording the time of braking, the braking distance and the braking acceleration; after the test is finished, discharging water in the environment box through the drain holes, taking out the test piece, wherein the test piece after the test can be used for researching the surface rutting depth and the damage condition; through changing the temperature that temperature regulator adjusted, humidity that humidity regulator adjusted, the pressure that the loading system applyed, rotate the motor drive test wheelset pivoted speed and the tire on the test wheel, carry out the test many times to same type of test piece, acquire road surface functional performance.
2. The rapid road surface function tester as claimed in claim 1, wherein: the environment box is provided with a plurality of sensor placing holes, and the sensor placing holes can be plugged tightly through plugs.
3. The rapid road surface function tester as claimed in claim 1, wherein: the environment box is of a rectangular cavity structure consisting of a top plate, 4 side plates and a bottom plate, and rollers are arranged at the bottom of the bottom plate.
4. The rapid road surface function tester as claimed in claim 1, wherein: the environment box is provided with an observation door, the observation door is provided with an observation window, the test piece placing platform and the bottom of the observation window are on the same horizontal plane, and the observation window is provided with a vertical scale.
5. The rapid road surface function tester as claimed in claim 4, wherein: the environment box is internally provided with a base, the base is provided with a sliding guide groove, a positioning baffle and a positioning fastener, the test piece placing platform is arranged on the sliding guide groove and passes through the positioning baffle for clamping the front side of the test piece placing platform, and the positioning fastener for clamping the rear side of the test piece placing platform.
6. The rapid road surface function tester as claimed in claim 1, wherein: and the test piece placing platform is provided with a positioning plate, and the buckle is arranged on the positioning plate.
7. The rapid tester of road surface functions of claim 1, characterized in that: the test piece is used as a material for manufacturing a road surface, a pavement or a track surface.
8. The rapid road surface function tester as claimed in claim 1, wherein: the pressurizing mechanism provides pressure for the lifting rod through a hydraulic device and drives the lifting rod to lift, and the pushing piece is a hydraulic rod.
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| CN105954113A (en) * | 2016-04-26 | 2016-09-21 | 长安大学 | Bituminous mixture circuit wheel tracking test device and test method |
| CN209485945U (en) * | 2019-01-29 | 2019-10-11 | 西安凯德液压机电有限责任公司 | A kind of experimental rig of study of tire and practical pavement friction characteristic |
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| US6276189B1 (en) * | 1995-03-13 | 2001-08-21 | James Kevin Hurson | Method and apparatus for continuous monitoring of road surface friction |
| CN203324155U (en) * | 2013-05-06 | 2013-12-04 | 浙江路达机械仪器有限公司 | Wheel rut experimental instrument for sunny and rainy days |
| CN204269495U (en) * | 2014-11-24 | 2015-04-15 | 长安大学 | A kind of ground surface material accelerates abrasion laboratory testing rig |
| CN108508190A (en) * | 2018-04-18 | 2018-09-07 | 长沙理工大学 | A kind of vehicle tracking test instrument under simulation braking state |
| CN109342232B (en) * | 2018-11-15 | 2023-06-02 | 长安大学 | Rut instrument with wear resistance of asphalt pavement |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954113A (en) * | 2016-04-26 | 2016-09-21 | 长安大学 | Bituminous mixture circuit wheel tracking test device and test method |
| CN209485945U (en) * | 2019-01-29 | 2019-10-11 | 西安凯德液压机电有限责任公司 | A kind of experimental rig of study of tire and practical pavement friction characteristic |
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