CN106840710B - Tire noise testing device and tire noise data acquisition system - Google Patents
Tire noise testing device and tire noise data acquisition system Download PDFInfo
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- CN106840710B CN106840710B CN201710063009.0A CN201710063009A CN106840710B CN 106840710 B CN106840710 B CN 106840710B CN 201710063009 A CN201710063009 A CN 201710063009A CN 106840710 B CN106840710 B CN 106840710B
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- vehicle body
- tire
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- noise
- testing device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
- G01M17/025—Tyres using infrasonic, sonic or ultrasonic vibrations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention provides a tire noise testing device, which relates to the technical field of tire noise testing and comprises a vehicle body, a traction part, a load, an acoustic hood and a noise detection device; the traction part is connected with the vehicle body, and the load is arranged on the vehicle body; the vehicle body is provided with a mounting position for mounting the tire, and the sound-absorbing cover is connected to the vehicle body and covers the mounting position, so that the tire on the mounting position is accommodated in the sound-absorbing cover; a noise detection device for detecting the noise of the tire is arranged in the sound-absorbing cover. The technical problem of high test cost of a rotary drum method and a sliding method is solved, the noise elimination cover can isolate environmental noise in the test process, test data are more accurate, and measurement accuracy is improved. The invention also provides a tire noise data acquisition system which comprises a data acquisition system, a sound sensor, a wheel speed sensor and a temperature measuring instrument which are respectively connected with the tire noise testing device. The method solves the problem of consistency of testing conditions in the testing process, and improves the accuracy of tire noise testing and the effectiveness of data.
Description
Technical Field
The invention relates to the technical field of tire noise testing, in particular to a tire noise testing device and a tire noise data acquisition system.
Background
With the increasing environmental protection awareness of people, the automobile noise problem is more and more focused, and the automobile noise is mainly derived from engine noise, exhaust noise, fan noise, transmission system noise, brake system noise, tire noise, wind noise and the like, wherein the tire noise is generated by friction between a tire and a road surface when a vehicle runs at a high speed, and the worse road condition is the greater the tire noise, so the tire noise is a main source of the noise of the automobile under the high-speed running condition. In this regard, a vehicle tire noise testing apparatus has been studied to test noise generated when tires and road surfaces are operated under different loads and different speeds by different tires.
The noise testing methods adopted at present mainly comprise a rotary drum method and a sliding method. The drum method can be used for evaluating the pattern vibration noise of the tire, the drum equipment is required to be placed in a semi-sound-absorbing chamber or a full-sound-absorbing chamber during measurement, the surface of the drum can simulate various road surfaces, the tire rolls on the drum according to a preset rotating speed, and the noise level or frequency spectrum can be recorded; the drum method is adopted for measurement, the measurement is required to be carried out indoors, the influence of the climate condition and the environmental condition is small, the measurement time is short, the repeatability of the measurement result is good, and the comparability of the measurement result is good; however, the drum method requires expensive drum equipment and semi/full-sound-absorbing chambers, resulting in high measurement cost, strong directivity of tire noise, the measured near-field value cannot represent the actual influence of far-field noise outside the vehicle on pedestrians, in addition, the drum has a certain curvature, the tire follows the drum and forms a horn mouth shape different from the actual road surface, the horn mouth sound amplification effect is different from that of the actual road surface driving, and the noise of the drum also affects the measurement result.
The sliding method is to test noise generated by a controlled vehicle running at a certain speed by installing a microphone at a certain distance and height on the road side; the practical situation of the radiation of the noise of the tire/road surface to the external far field can be well represented by the tested result of the sliding method, and the measurement accuracy is higher; however, the cost of measurement is high, a test road section meeting a certain standard is required, the test is long in time consumption, the external influence, especially the influence of the climate condition is large, the traffic area must be far away, the equipment measured during measurement is limited, and the test of a single tire cannot be performed.
Disclosure of Invention
The invention aims to provide a tire noise testing device, which solves the problems in the prior art that the measurement cost is high, the field is affected and the measurement data is inaccurate by adopting a rotary drum method; the cost of the measuring equipment adopting the sliding method is high, the requirement on the test road section is high, and the technical problem that the test equipment is limited due to the external influence is solved.
The invention also provides a tire noise data acquisition system, which is used for solving the technical problems that in the prior art, test data for tire noise test is easy to lose, the test result is greatly influenced by environmental noise, and the accuracy is difficult to control.
The invention provides a tire noise testing device, which comprises a vehicle body, a traction part, a load, an acoustic hood and a noise detection device, wherein the vehicle body is provided with a plurality of wheels;
the traction part is connected with the vehicle body, and the load is arranged on the vehicle body; the vehicle body is provided with a mounting position for mounting the tire, and the sound-absorbing cover is connected to the vehicle body and covers the mounting position, so that the tire on the mounting position is accommodated in the sound-absorbing cover; a noise detection device for detecting the noise of the tire is arranged in the sound absorption cover.
Further, the load comprises a connecting rod and a plurality of balancing weights;
one end of the connecting rod is connected to the vehicle body, and the plurality of balancing weights are selectively sleeved on the connecting rod to adjust the quality of a load mounted on the vehicle body.
Further, the device also comprises a sliding mechanism;
the sliding mechanism comprises a first lead screw, a hand wheel, a first sliding block and a sliding rod;
one end of the first screw rod is connected to the vehicle body and arranged on one side of the vehicle body, the other end of the first screw rod is connected with a hand wheel, and the first sliding block is connected to the first screw rod and connected with an acoustic hood of the vehicle body; the second sliding block is arranged on the sound-absorbing cover, the sliding rod is connected to the other side of the vehicle body, and the second sliding block is connected to the sliding rod;
when the hand wheel rotates, the first sliding block is driven to move along the vertical direction, and the first sliding block drives the sound-absorbing cover to enable the second sliding block to move along the sliding rod in the vertical direction.
Further, the noise detection device comprises a support frame and a detector;
the detector is connected to one end of the supporting frame, and the other end of the supporting frame is connected to the inside of the sound-absorbing cover.
Further, the vehicle further comprises a lifting mechanism connected to the vehicle body, wherein the lifting mechanism comprises a second screw rod, a supporting seat and a worm gear;
one end of the second screw rod is connected to the vehicle body, the other end of the second screw rod is connected to the supporting seat, and the worm gear is connected to the second screw rod and can adjust the distance between the vehicle body and the ground.
Further, the device also comprises an elastic piece;
the elastic piece is connected to the vehicle body, the tire is connected to the vehicle body through the axle, the middle part of the elastic piece is connected to the axle through the hanging piece, and two ends of the elastic piece are respectively connected to the vehicle body through the fixing seat.
Further, the support frame and the detector are correspondingly multiple.
Further, the traction part is connected with a bracket, and the bracket supports the vehicle body.
Further, the sound absorbing material is arranged in the sound absorbing cover.
The invention also provides a tire noise data acquisition system, which comprises a data acquisition system, a sound transmitter, a wheel speed sensor, a temperature measuring instrument and the tire noise testing device, wherein the data acquisition system, the sound transmitter, the wheel speed sensor and the temperature measuring instrument are respectively connected with the tire noise testing device.
According to the tire noise testing device provided by the invention, the traction part is connected to the lower surface of the vehicle body, and the traction part is used for traction the vehicle body to move forwards; the upper surface of the vehicle body is connected with a load, and the load can be detached at any time according to the requirement so as to adjust the weight of the vehicle body; two mounting positions are arranged at the lower part of the vehicle body, and tires are respectively mounted in the two mounting positions and support the vehicle body; the sound-absorbing cover is connected to two sides of the vehicle body, covers the installation position and covers the two tires in the sound-absorbing cover; and a noise detection device is arranged in the sound-absorbing cover so that the noise detection device detects the noise of the tire.
The invention also provides a tire noise data acquisition system, the tire noise testing device is connected with the data acquisition system of the system, and when the tire noise testing device is tested, the data acquisition system stores the data measured by the tire noise testing device and then stores the data in a designated folder, so that a worker can conveniently analyze the measured data, and the testing working efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without any inventive effort for a person skilled in the art.
FIG. 1 is a schematic side view of a structure according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another side structure according to an embodiment of the present invention;
fig. 3 is an enlarged view of a portion a in fig. 2;
FIG. 4 is a schematic view of a partial split according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a traction portion according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of the sound-absorbing cover according to the embodiment of the invention when lifted;
FIG. 7 is a schematic view of a side of a vehicle body without a muffler provided in an embodiment of the present invention;
fig. 8 is an enlarged view of a portion B in fig. 7;
fig. 9 is a schematic structural diagram of a noise detection device according to an embodiment of the present invention;
FIG. 10 is a schematic view of another side of a vehicle body without a muffler provided in an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a lifting mechanism according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of an elastic member according to an embodiment of the present invention.
Icon: 11-a vehicle body; 12-a traction part; 13-loading; 14-an acoustic hood; 15-noise detection means; 16-a sliding mechanism; 17-a lifting mechanism; 18-an elastic member; 121-a bracket; 131-connecting rods; 132-balancing weight; 141-a second slider; 151-supporting frames; 152-a detector; 161-a first lead screw; 162-a hand wheel; 163-first slider; 164-slide bar; 171-a second lead screw; 172-supporting seats; 173-worm gear; 181-hanging pieces; 182-fixing seat.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be a mechanical connection or an electrical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases by those of ordinary skill in the art.
FIG. 1 is a schematic side view of a structure according to an embodiment of the present invention; FIG. 2 is a schematic diagram of another side structure according to an embodiment of the present invention; fig. 3 is an enlarged view of a portion a in fig. 2; FIG. 4 is a schematic view of a partial split according to an embodiment of the present invention; fig. 5 is a schematic structural diagram of a traction portion according to an embodiment of the present invention; fig. 6 is a schematic structural diagram of the sound-absorbing cover according to the embodiment of the invention when lifted; FIG. 7 is a schematic view of a side of a vehicle body without a muffler provided in an embodiment of the present invention; fig. 8 is an enlarged view of a portion B in fig. 7; fig. 9 is a schematic structural diagram of a noise detection device according to an embodiment of the present invention; FIG. 10 is a schematic view of another side of a vehicle body without a muffler provided in an embodiment of the present invention; fig. 11 is a schematic structural diagram of a lifting mechanism according to an embodiment of the present invention; fig. 12 is a schematic structural diagram of an elastic member according to an embodiment of the present invention.
As shown in fig. 1 to 6, the invention provides a tire noise testing device, which comprises a vehicle body 11, a traction part 12, a load 13, an acoustic hood 14 and a noise detection device 15;
the traction part 12 is connected with the vehicle body 11, and the load 13 is mounted on the vehicle body 11; the car body 11 is provided with a mounting position for mounting tires, and the sound-absorbing cover 14 is connected to the car body 11 and covers the mounting position, so that the tires on the mounting position are accommodated in the sound-absorbing cover 14; a noise detection device 15 for detecting noise of the tire is installed in the noise damper 14.
The vehicle body 11 comprises a bottom plate, side plates at two sides, a top plate and tires, wherein the bottom plate, the side plates at two sides and the top plate are connected into a closed cavity, the tires are connected at two sides of the rear position of the bottom plate and support the rear position of the cavity, the two tires are connected through an axle, and the axle is connected at the lower position of the bottom plate; the traction part 12 is a traction rod, as shown in fig. 5, the right section of the traction rod is a connecting rod, the left section of the traction rod is provided with three square rods, the right ends of the three square rods are connected with the left ends of the connecting rod, the left ends of the three square rods are distributed in a fan shape, the three square rods are connected to the bottom plate of the vehicle body 11 and are contained at the front position of the chamber, so that the front part of the chamber seals the three square rods, the appearance effect is better, and when the connecting rod of the right section is pulled rightwards, the three square rods of the left section are driven to pull the vehicle body 11 to move to the right; the load 13 may be connected to the bottom plate of the vehicle body 11 in a movable connection manner, or may be connected to the bottom plate of the vehicle body 11 in a fixed connection manner, so as to adjust the weight of the vehicle body 11 at any time; two mounting positions are respectively arranged on two sides of the rear part of the bottom plate of the car body 11, and two tires are respectively mounted in the mounting positions for fixing; the sound-absorbing cover 14 is connected to two side plates of the vehicle body 11, the sound-absorbing cover is arranged at the installation position, two tires are respectively accommodated in the sound-absorbing cover 14, the sound-absorbing cover 14 is a sound-absorbing and noise-reducing cover body, a hollow body is formed by sealing a plurality of side plates and top plates, the tires are arranged in the sound-absorbing cover 14, and the sound-absorbing and noise-reducing effects of the tires are obvious; as shown in fig. 6, the side plate and the top plate of the sound-absorbing cover 14 can be lifted upwards by adopting hinge connection between the sound-absorbing cover 14 and the side plate of the vehicle body 11, so that the tire can be replaced conveniently; a noise detection device 15 is fixedly connected in the noise reduction cover 14, and the noise detection device 15 detects the noise of the tire.
Further, the load 13 includes a connecting rod 131 and a plurality of weights 132;
one end of the connecting rod 131 is connected to the vehicle body 11, and a plurality of the weights 132 are selectively sleeved on the connecting rod 131 to adjust the mass of the load 13 mounted on the vehicle body 11.
As shown in fig. 7, the connecting rod 131 is a threaded rod, the lower end of the threaded rod is fixedly connected to the bottom plate, the balancing weight 132 is formed with a threaded hole, the threaded rod passes through the threaded hole to connect the balancing weight 132 to the threaded rod, and then the upper end of the threaded rod is screwed and fixed by using a nut to firmly connect the balancing weight to the threaded rod; the balancing weight 132 may be a rectangular plate or a circular plate; the number of the balancing weights 132 may be one or more, when the number of the balancing weights 132 is one, the weight of the balancing weights 132 is fixed, when the balancing weights 132 are mounted on the vehicle body 11, the weight of the balancing weights 11 is increased, and when the number of the balancing weights 132 is more than one, the number of the balancing weights 132 can be increased or reduced at any time, so that the weight of the vehicle body 11 can be adjusted at any time.
Further, a sliding mechanism 16 is included;
the sliding mechanism 16 comprises a first lead screw 161, a hand wheel 162, a first sliding block 163 and a sliding rod 164;
one end of the first screw rod 161 is connected to the vehicle body 11 and is arranged at one side of the vehicle body 11, the other end of the first screw rod 161 is connected with a hand wheel 162, and the first slider 163 is connected to the first screw rod 161 and is connected with the sound-absorbing cover 14 of the vehicle body 11; the second sliding block 141 is arranged on the sound-absorbing cover 14, the sliding rod 164 is connected to the other side of the vehicle body 11, and the second sliding block 141 is connected to the sliding rod 164;
when the hand wheel 162 rotates, the first slider 163 is driven to move in the vertical direction, and the first slider 163 drives the sound-absorbing cover 14 to move the second slider 141 in the vertical direction along the sliding rod 164.
As shown in fig. 8, the lower end of the first screw rod 161 is fixedly connected to the bottom plate of the vehicle body 11 and is disposed on the inner side surface of the side plate of the vehicle body 11, the upper end of the first screw rod 161 is connected to a hand wheel 162, the hand wheel 162 can rotate, the first slider 163 is slidably connected to the first screw rod 161, when the hand wheel 162 rotates, the first slider 163 can be driven to move up and down, the outer side surface of the first slider 163 is fixedly connected to the inner side surface of the sound-absorbing cover 14, and when the first slider 163 moves up and down, the sound-absorbing cover 14 is driven to move up and down; the two sliding rods 164 are fixedly connected to the outer side surface of the side plate of the vehicle body 11 and are arranged on two sides of the first lead screw 161, four second sliding blocks 141 arranged on the same plane are arranged on the sound-absorbing cover 14, two ends of each sliding rod 164 are respectively connected with the two second sliding blocks 141, and when the sound-absorbing cover 14 is driven by the first sliding blocks 163 to move along the vertical direction, the second sliding blocks 141 are driven to move along the sliding rods 164 along the vertical direction; because this device is used for installing the tire of different heights, and carries out the tire noise test, when the tire of different heights is installed in the sound-absorbing cover 14, the distance between sound-absorbing cover 14 and the ground will be the inequality, and when carrying out the test to the tire noise, need the distance between sound-absorbing cover 14 and the ground to keep prescribed invariable distance, in order to make the tire of different heights install in the sound-absorbing cover 14, make the distance between sound-absorbing cover 14 and the ground keep invariable, when carrying out the test to the tire noise, can adjust through slide mechanism 16 to cancel the distance between sound-absorbing cover 14 and the ground.
Further, the noise detecting device 15 includes a supporter 151 and a detector 152;
the detector 152 is connected to one end of the supporting frame 151, and the other end of the supporting frame 151 is connected to the inside of the sound-absorbing cover 14.
As shown in fig. 9, the left end of the supporting frame 151 is connected to the inner side of the sound-absorbing cover 14, or may be connected to the rotating shaft of the tire, the right end of the supporting frame 151 is connected to the detector 152, the detector 152 is aligned with the tire, and the detector 152 tests the noise generated by the tire when the tire is running in the sound-absorbing cover 14. In addition, the user can adjust the position between the detector 152 and the tire through the support 151 according to different testing requirements so as to adapt to the testing requirements of different tires.
Further, the vehicle further comprises a lifting mechanism 17 connected to the vehicle body 11, wherein the lifting mechanism 17 comprises a second screw 171, a supporting seat 172 and a worm gear 173;
one end of the second screw 171 is connected to the vehicle body 11, the other end of the second screw 171 is connected to a support seat 172, and the worm gear 173 is connected to the second screw 171 and is capable of adjusting the distance between the vehicle body 11 and the ground.
As shown in fig. 10, the lifting mechanisms 17 are two corresponding lifting mechanisms, which are respectively connected to two end positions of the rear part of the bottom plate of the vehicle body 11 to support the rear part of the bottom plate of the vehicle body 11, or four lifting mechanisms 17 are arranged and respectively connected to four corner positions of the bottom plate of the vehicle body 11 to make the bottom plate of the vehicle body 11 more stable; as shown in fig. 11, the lower end of the second screw rod 171 is connected to a support seat 172, the support seat 172 is cylindrical, the diameter of the support seat 172 is larger than that of the second screw rod 171, so that the support seat 172 supports the bottom end of the second screw rod 171, the upper end of the second screw rod 171 is connected to the vehicle body 11 and can move up and down in a connecting hole of the vehicle body 11, the worm gear 173 is movably connected to the second screw rod 171, when the worm gear 173 is rotated, the second screw rod 171 can be driven to move up and down, one end surface of the inner side of the worm gear 173 on the second screw rod 171 is connected to the sound-absorbing cover 14 to drive the sound-absorbing cover 14 to move up and down, so that the distance between the vehicle body 11 and the ground is increased or decreased, the distance between the bottom plate of the vehicle body 11 and the ground is adjusted, the tire is accommodated in the sound-absorbing cover 14 or the tire is far from the sound-absorbing cover 14, and the tire is convenient to replace. When the tire is required to be replaced, the worm gear 173 is rotated clockwise to lengthen the length of the second screw 171, and the distance between the vehicle body 11 and the ground is lengthened, and at this time, the bottom surface of the vehicle body 11 is supported by the support seat 172, so that the tire is convenient to be replaced; after the tire is replaced, the worm gear 173 is rotated counterclockwise to shorten the length of the second screw 171, and the distance between the vehicle body 11 and the ground is shortened, and at this time, the bottom surface of the vehicle body 11 is supported by two tires, and then a tire noise test is performed. When the tire is replaced, the two lifting mechanisms 17 can be simultaneously opened, so that the two supporting seats 172 support the lower part of the whole vehicle body 11, and then the tire is replaced, thereby improving the stability of tire replacement.
Further, the device also comprises an elastic piece 18;
the elastic member 18 is connected to the vehicle body 11, the tire is connected to the vehicle body 11 through an axle, the middle portion of the elastic member 18 is connected to the axle through a hanger 181, and two ends of the elastic member 18 are respectively connected to the vehicle body 11 through fixing seats 182.
As shown in fig. 10 and 12, the elastic member 18 may be a leaf spring, or may be other elastic members, two tires connected to the bottom plate of the vehicle body 11 are connected by an axle, two ends of the leaf spring are respectively connected to the bottom of the vehicle body 11 by a fixing seat 182, and the middle part of the leaf spring is fixedly connected to the axle by a hanging member 181, or may be fixedly connected to the axle by other locking blocks, and the leaf spring adopts two leaf springs to fix the two ends of the axle and the bottom plate of the vehicle body 11; the leaf spring increases the mechanical damping of the vehicle body 11 and also can act to reduce the vibration of the vehicle body, thereby reducing the impact on the tire noise test.
Further, the number of the supporting frames 151 and the detectors 152 is plural.
As shown in fig. 9, the number of the noise detection devices 15 may be three, the middle noise detection device 15 is arranged along the vertical line direction, and the included angle between the noise detection devices 15 at two ends and the middle noise detection device 15 is 45 degrees, so that the noise detection devices 15 at two ends are vertically arranged, and thus, the noise of the tire can be uniformly collected from multiple aspects, and the test can be accurately performed.
Further, a bracket 121 is connected to the traction portion 12, and the bracket 121 supports the vehicle body 11.
As shown in fig. 1, the right section of the traction portion 12 is a connecting rod, and a bracket 121 is arranged at the lower part of the left end of the connecting rod, so that when a tire is detected, the bracket 121 is used for supporting the lower part of the traction rod at any time, so that the connecting rod of the right section and the three square rods of the left section are always on the same horizontal plane, and the maintenance or the tire replacement of the vehicle body 11 is facilitated.
Further, the sound absorbing material is disposed in the sound absorbing cover 14.
As shown in fig. 2, the sound absorbing material is a wave crest sponge, and other sound absorbing materials can be adopted, the wave crest sponge is made of polyurethane, the surface is concave-convex, the wave crest shape of the wave crest sponge increases the surface area of the wave crest sponge, the wave crest sponge is favorable for absorbing sound better, different colors can be set according to the used scene, and in addition, the wave crest sponge is internally provided with a flame retardant, so that the wave crest sponge has a flame retardant effect and is safer in use.
According to the tire noise testing device provided by the invention, the traction part is used for traction on the movement of the vehicle body, and the load is arranged on the vehicle body, so that the weight of the load can be adjusted at any time according to the testing requirement, and the noise of the tire when working under different loads can be conveniently tested; the outer cover of the tire is provided with the sound-absorbing cover, and the sound-absorbing cover can reduce the influence of the noise of the vehicle body and the environment, so that the reliability of the test is improved; the sound-absorbing cover is connected to the side surface of the vehicle body through the sliding device and can move along the vertical direction, so that the tires can cover or separate from the sound-absorbing cover, the distance between the sound-absorbing cover and the ground when different tires are installed can be adjusted, the distance between the sound-absorbing cover and the ground is constant, the noise of different tires can be conveniently tested, the tires can be quickly detached and installed, the tire changing process is simplified, and the tire changing and test efficiency of the sound-absorbing cover is improved; the automobile body and the axle are connected by adopting a leaf spring, so that impact noise during high-speed running of the automobile body is reduced. The invention adopts the mode, can accurately detect the noise level of different tires under different loads and under the road surface running condition, has simple testing mode and reliable testing result.
The invention also provides a tire noise data acquisition system, which comprises a data acquisition system, a sound transmitter, a wheel speed sensor, a temperature measuring instrument and the tire noise testing device, wherein the data acquisition system, the sound transmitter, the wheel speed sensor and the temperature measuring instrument are respectively connected with the tire noise testing device.
According to the tire noise data acquisition system, the tire noise testing device is connected with the data acquisition system, when the tire is subjected to noise testing, the data acquisition system can store multiple groups of data tested by the tire noise testing device and then store the multiple groups of data in the designated folder, so that a tester can conveniently carry out statistical analysis on the multiple groups of test data, and a tire rotating speed signal, a noise signal and a temperature signal can be recorded simultaneously in the testing process and are used for subsequent data analysis, and the testing efficiency is improved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting thereof; while the invention has been described in detail with reference to the foregoing embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme recorded in the foregoing embodiments can be modified or some or all of the technical features of the technical scheme can be replaced equivalently; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. The tire noise testing device is characterized by comprising a vehicle body (11), a traction part (12), a load (13), an acoustic hood (14), a sliding mechanism (16) and a noise detection device (15);
the traction part (12) is connected with the vehicle body (11), and the load (13) is mounted on the vehicle body (11); the vehicle body (11) is provided with a mounting position for mounting the tire, and the sound-absorbing cover (14) is connected to the vehicle body (11) and covers the mounting position, so that the tire on the mounting position is accommodated in the sound-absorbing cover (14); a noise detection device (15) for detecting the noise of the tire is arranged in the sound absorption cover (14);
the sliding mechanism (16) comprises a first lead screw (161), a hand wheel (162), a first sliding block (163) and a sliding rod (164);
one end of the first screw rod (161) is connected to the vehicle body (11) and is arranged on one side of the vehicle body (11), the other end of the first screw rod (161) is connected with a hand wheel (162), and the first sliding block (163) is connected to the first screw rod (161) and is connected with the sound-absorbing cover (14) of the vehicle body (11); the sound-absorbing cover (14) is provided with a second sliding block (141), the sliding rod (164) is connected to the other side of the vehicle body (11), and the second sliding block (141) is connected to the sliding rod (164);
when the hand wheel (162) rotates, the first sliding block (163) is driven to move in the vertical direction, and the first sliding block (163) drives the sound-absorbing cover (14) to enable the second sliding block (141) to move in the vertical direction along the sliding rod (164);
the load (13) comprises a connecting rod (131) and a plurality of balancing weights (132);
one end of the connecting rod (131) is connected to the vehicle body (11), and a plurality of balancing weights (132) are selectively sleeved on the connecting rod (131) to adjust the mass of a load (13) mounted on the vehicle body (11).
2. Tyre noise testing device according to claim 1, wherein said noise detection device (15) comprises a support frame (151) and a detector (152);
the detector (152) is connected to one end of the supporting frame (151), and the other end of the supporting frame (151) is connected to the inside of the sound-absorbing cover (14).
3. Tyre noise testing device according to claim 1, further comprising a lifting mechanism (17) connected to the vehicle body (11), said lifting mechanism (17) comprising a second screw (171), a support seat (172) and a worm gear (173);
one end of the second screw rod (171) is connected to the vehicle body (11), the other end of the second screw rod (171) is connected to the supporting seat (172), and the worm gear (173) is connected to the second screw rod (171) and can adjust the distance between the vehicle body (11) and the ground.
4. Tyre noise testing device according to claim 1, further comprising an elastic element (18);
the elastic piece (18) is connected to the vehicle body (11), the tire is connected to the vehicle body (11) through an axle, the middle part of the elastic piece (18) is connected to the axle through a hanging piece (181), and two ends of the elastic piece (18) are respectively connected to the vehicle body (11) through fixing seats (182).
5. Tyre noise testing device according to claim 2, wherein said support frame (151) and detector (152) are of corresponding plurality.
6. Tyre noise testing device according to claim 1, characterized in that a bracket (121) is connected to the traction portion (12), the bracket (121) supporting the vehicle body (11).
7. Tyre noise testing device according to claim 1, wherein the sound-absorbing material is provided in the sound-absorbing cover (14).
8. A tire noise data acquisition system, comprising a data acquisition system, a sound transmitter, a wheel speed sensor, a temperature measuring instrument and a tire noise testing device according to any one of claims 1 to 7, wherein the data acquisition system, the sound transmitter, the wheel speed sensor and the temperature measuring instrument are respectively connected with the tire noise testing device.
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| JP7011453B2 (en) * | 2017-12-07 | 2022-01-26 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Tire noise test equipment and method |
| CN110441076B (en) * | 2018-05-03 | 2021-06-15 | 上汽通用汽车有限公司 | Silent trailer |
| CN109443793B (en) * | 2018-10-12 | 2021-04-09 | 东风汽车有限公司 | Method for testing noise outside automobile |
| CN109855722B (en) * | 2018-12-27 | 2021-03-16 | 四川轮胎橡胶（集团）股份有限公司 | Method for testing outdoor passing noise of tire |
| CN110455395B (en) * | 2019-08-28 | 2021-07-27 | 哈尔滨工业大学 | Weight-moving type double-wheel noise detection vehicle for tire-road noise test |
| CN112924547B (en) * | 2021-01-28 | 2023-03-10 | 招商局公路信息技术（重庆）有限公司 | Tire/road surface in-situ noise acquisition device and method thereof |
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