CN105651858A - Device and method for testing noise indoors by means of simulating driving of automobile on micro-surfacing road surface - Google Patents

Abstract

The invention discloses a device and a method for testing noise indoors by means of simulating driving of an automobile on a micro-surfacing road surface, and relates to a testing device and a testing method, in particular to the device and method for testing the noise indoors by means of simulating the driving of the automobile on the micro-surfacing road surface. The invention aims to solve the problems that a lot of manpower and material resources are necessarily consumed, and a measurement structure is affected by difficultly-controlled factors, such as wind speed, background noise, traffic flow and the like in a certain degree during the process of testing the noise of the micro-surfacing road surface outdoors. The device comprises a pedestal, a circular runway, a testing wheel, a transverse shaft, a vertical shaft, a driving shaft, a lifting vertical shaft rotary knob, a driven gear, a driving gear, a hinged column base and an engine, wherein the circular runway is arranged on the upper surface of the pedestal; the engine is arranged in the pedestal; the lower end of the driving shaft is arranged at the middle part of the inner bottom surface of the pedestal through the hinged column base; the driven gear is arranged on the driving shaft in a sheathing manner. The device and the method disclosed by the invention are applied to testing of the noise of the micro-surfacing road surface.

Description

A kind of simulated automotive travels at micro-surface area road rumble indoor test device and method

Technical field

The present invention relates to a kind of test device and method, be specifically related to a kind of simulated automotive and travel at micro-surface area road rumble indoor test device and method, belong to traffic and transport field.

Background technology

Micro-surface area has good waterproof, antiskid, wear-resisting and fill the effect of rut, it is possible to significantly improve the serviceability on road surface, and the feature that its short construction period, open to traffic are fast, compared with other maintenance of surface technology, there is bigger advantage. Wideling popularize and widely using in process at micro zooming, it is found that vehicle travel add be covered with on the road surface of micro-surface area time, it is that internal car noise or pass-by noise are all apparently higher than asphalt concrete road surface, not only have impact on the road-ability of driver and crew, also surrounding enviroment are caused a degree of sound pollution, thus constraining the development of micro zooming, hence setting up rational micro-surface area noise rating method and there is important practical significance.

At present, the main method of domestic road pavement noise reduction evaluation is the road surface that on-the-spot making is designed by indoor theory, then at the scene actual road surface is carried out noise actual measurement. The advantage of this method be the data obtained accurately and reliably, for the data that reality really gathers. But, on-the-spot surfacing needs rational test site, substantial contribution and the mechanical and a considerable amount of technical staff of professional construction supporting accordingly. The simultaneously restriction of the wayward factor such as the situ measurements vehicle that to be limited primarily by wind speed, wind direction, temperature, background noise, the service life on road surface, road surface main travels, vehicle flowrate, is unfavorable between different road surface the contrast of noise reduction.

Considering the factor such as experimental condition and feasibility, micro-surfacing mixture is carried out noise rating and has great importance for the contrast of noise reduction and the research and development of low noise micro-surfacing mixture between the application of micro-surfacing mixture, different road surface by contrived experiment scheme in indoor.

Summary of the invention

The present invention solves that micro-surface area road surface outdoor survey noise needs to consume a large amount of manpower and materials, and measurement structure is had a problem of certain impact by the wayward factor such as wind speed, background noise, vehicle flowrate during test noise, and then propose a kind of simulated automotive and travel at micro-surface area road rumble indoor test device and method.

The present invention solves that the problems referred to above adopt the technical scheme that: test device of the present invention includes base, endless track, experimental wheel, transverse axis, vertical pivot, drive axle, lifting vertical pivot knob, driven gear, driving gear, hinged column base and electromotor, endless track is arranged on the upper surface of base, electromotor is arranged in base, the lower end driving axle is arranged on the middle part of base inner bottom surface by hinged column base, driven gear is set with on the driving shaft, driving gear is sleeved on the rotation axle of electromotor, driving gear engages with driven gear, the lower end of vertical pivot is by lifting vertical pivot knob and the upper end driving axle, one end of transverse axis is connected with vertical pivot, the other end of transverse axis is connected with experimental wheel, the wheel rim of experimental wheel and the upper surface of endless track.

Specifically comprising the following steps that of method of testing of the present invention

Step one, assembling testing equipment: the micro-surfacing mixture being uniformly mixed poured in eight test moulds and strike off rapidly, being cooled to room temperature, eight being tested in the corresponding groove that moulds embed base upper surfaces;

Step 2, experimental wheel is arranged on the other end of transverse axis, makes the wheel rim of experimental wheel just touch on micro-surface area runway;

Step 3, sound meter is arranged on the upper surface of dividing plate;

Step 4, sound insulation cover buckle is contained on endless track, and makes sound insulation lid and base by thread compact siro spinning technology;

Step 5, collection data:

Step 5 (one), startup electromotor, simulation real road travel speed, experiment with measuring wheel speed reaches the noise that 20km/h, 40km/h, 60km/h, 80km/h make respectively, the traveling radius of experimental wheel is 0.5m, is computed obtaining vertical pivot and is taken turns angular velocity respectively 212r/min, 424r/min, 637r/min, the 849r/min that should reach by transverse axis motoring ring test;

The maximum sound level of the noise that experimental wheel sends when step 5 (two), record rotate at various speeds.

The invention has the beneficial effects as follows: 1, the experimental condition of the present invention is controlled, the influence of noise measurement result that other vehicles when can avoid outdoor measurement, the outside environmental elements such as artificial send, the quiet airtight laboratory measurement noise of indoor selection is accurate; 2, to test required micro-surface area material controlled for the present invention, a lot of situations need the micro-surface area road rumble impact of contrast different gradation, outdoor survey is made an uproar needs to expend lot of materials, manpower and materials are laid section and carried out the test of noise, and the present invention just can carry out the test of noise by the mix of indoor compound in a small amount with mating formation, economize on resources; 3, the present invention is by the influence of noise of comparative evaluation's each of which of noise reduction between different micro-surface area road surfaces, being significant to the research and development of low-noise micro-surfacing compound; 4, in the present invention, tire texture, rate request, micro-surface area road surface are all that simulating actual conditions carries out, and therefore noise testing result and actual noise situation are more or less the same, and error is little; 5, existing micro-surface area noise could must measure after construction completes, and is the later evaluation to micro-surfacing mixture noise situations, it is impossible to before it comes into operation, noise level is estimated, is unfavorable for the selection of micro-surfacing mixture grating. And the indoor micro-surface area noise testing method of the present invention is by the noise testing to different micro-surface area, the noise of micro-surface area can be evaluated, estimates before construction.

Accompanying drawing explanation

Fig. 1 is the perspective view of test device of the present invention, and Fig. 2 is the structural representation of sound insulation lid, and Fig. 3 is the top view of test device of the present invention, and Fig. 4 is the main sectional view of test device of the present invention.

Detailed description of the invention

Detailed description of the invention one: present embodiment is described in conjunction with Fig. 1 to Fig. 4, described in present embodiment, a kind of simulated automotive travels and includes base 1 at micro-surface area road rumble indoor test device, endless track 2, experimental wheel 3, transverse axis 4, vertical pivot 5, drive axle 6, lifting vertical pivot knob 7, driven gear 8, driving gear 9, hinged column base 10 and electromotor 11, endless track 2 is arranged on the upper surface of base 1, electromotor 11 is arranged in base 1, the lower end driving axle 6 is arranged on the middle part of base 1 inner bottom surface by hinged column base 10, driven gear 8 is sleeved on driving axle 6, driving gear 9 is sleeved on the rotation axle of electromotor 11, driving gear 9 engages with driven gear 8, the lower end of vertical pivot 5 is by lifting vertical pivot knob 7 and the upper end driving axle 6, one end of transverse axis 4 is connected with vertical pivot 5, the other end of transverse axis 4 is connected with experimental wheel 3, the upper surface of the wheel rim of experimental wheel 3 and endless track 2.

In present embodiment, the design external diameter of endless track 2 is 0.58m, if diameter is too big, then manufacturing mould cost increases, and Surface of Trial Pavement material requested of mating formation is more every time, simultaneously, diameter again can not be too little, same angular velocity situation, and radius is more big, linear velocity can be reached more big, the width of endless track 2 is 8cm, and the width of experimental wheel 3 is 3.2cm, and diameter is 8cm.

Being arranged in base 1 by electromotor 11 in present embodiment, and base 1 increases base quality with in guarantee test process, whole assay device is not susceptible to shake, and effectively prevents other vibration noise that apparatus working brings.

In present embodiment, the setting of transverse axis 4 size must being fulfilled for being rigidly connected at itself and vertical pivot 5 locating the requirement of allowable stress, and concrete calculation procedure is as follows:

The material of transverse axis 4 adopts Q235 steel, allowable stress [��]=160MPa, density p=7.85g/cm³, length l₀For 0.5m, wheel mass is less ignores, and wheels travel acceleration is not easily measured, and in reality, the conventional acceleration time shows automobile acceleration capacity, if acceleration is 1m/s², transverse axis radius is r, then transverse axis cross section maximum tension stress ��_maxFor

${\mathrm{\σ}}_{\max }=\frac{M}{W_z}$ ��

$W_z=\frac{{\mathrm{\πd}}^3}{32}$ ��

$M=F\·l=m\·a\·\frac{l_0}{2}={\mathrm{\ρ\πr}}^{2}a\frac{l_0}{2}$ ��

Then transverse axis cross section maximum stress ��_maxFor:

${\mathrm{\σ}}_{max}=\frac{M}{W_z}=\frac{2{\mathrm{\ρal}}_0}{r}=\frac{2\×7850\×1\×0.5}{r}=\[\mathrm{\σ}\]=160MPa$

$r=\frac{7850}{160\×{10}^6}=5\×{10}^{-5}m;$

Formula 1. 2. 3. in: W_zRepresenting module of anti-bending section, M represents that section turn moment, m represent transverse axis quality, and a represents transverse axis central acceleration, and l represents the arm of force of production cross section moment of flexure;

Known by acquired results is 1m/s at acceleration²Time, radius has only to 5 �� 10^-5Namely m meets rigidity requirement, it is assumed that instantaneous acceleration can reach 100m/s², allow that tension stress requirement, required radius are 0.5cm for meeting, therefore mould transverse axis diameter is set as that 2cm is sufficient for rigidity requirement.

Detailed description of the invention two: present embodiment is described in conjunction with Fig. 1 to Fig. 4, the endless track 2 that a kind of simulated automotive described in present embodiment travels at micro-surface area road rumble indoor test device is tested the mould 2-1 endless track 2 formed by eight, the upper surface of base 1 is provided with the cannelure being made up of eight groove 1-1, is embedded in a test mould 2-1 in each groove 1-1 respectively. Mating formation of so setting, the convenient dismounting of one side and micro-surface area, another aspect can carry out the noise testing of multiple different micro-surface area or other compounds simultaneously. Other composition and annexation and detailed description of the invention one identical.

Detailed description of the invention three: present embodiment is described in conjunction with Fig. 1 to Fig. 4, described in present embodiment, a kind of simulated automotive travels and also includes sound insulation lid 12 at micro-surface area road rumble indoor test device, sound insulation lid 12 spiral-lock is on endless track 2, and the lateral wall on the medial wall of sound insulation lid 12 bottom and base 1 top is threaded connection.The height of sound insulation lid 12 is 40cm, before on-test, by sound insulation lid 12 spiral-lock on endless track 2, and sound insulation lid 12 is tightened, and sound insulation lid is positioned on control handle, both makes test carry out under airtight noise without external environment, also made control handle not be blocked. Other composition and annexation and detailed description of the invention one or two identical.

Detailed description of the invention four: present embodiment is described in conjunction with Fig. 1 to Fig. 4, described in present embodiment, a kind of simulated automotive travels and also includes sound meter 13 and dividing plate 14 at micro-surface area road rumble indoor test device, dividing plate 14 is arranged on the inner side of endless track 2, and sound meter 13 is arranged on dividing plate 14. Other composition and annexation and detailed description of the invention three identical.

Detailed description of the invention five: present embodiment is described in conjunction with Fig. 1 to Fig. 4, a kind of simulated automotive described in present embodiment travels specifically comprising the following steps that at micro-surface area road rumble indoor test method

Step one, assembling testing equipment: poured into by the micro-surfacing mixture being uniformly mixed in eight test mould 2-1 and strike off rapidly, being cooled to room temperature, test in the mould 2-1 corresponding groove 1-1 embedding base 1 upper surfaces by eight;

Step 2, experimental wheel 3 is arranged on the other end of transverse axis 4, makes the wheel rim of experimental wheel 3 just touch on micro-surface area runway;

Step 3, being arranged on the upper surface of dividing plate 14 by sound meter 13, sound meter A spectrum overlapping characteristic and F time character of weighting are selected in the measurement of noise, select the maximum of sound meter to keep (HOLD) function under A weighting network;

Step 4, by sound insulation lid 12 spiral-lock on endless track 2, and make sound insulation lid 12 and base 1 by screw thread compact siro spinning technology;

Step 5, collection data:

Step May Day, start electromotor 11, simulation real road travel speed, experiment with measuring is taken turns 3 speed and is reached the noise that 20km/h, 40km/h, 60km/h, 80km/h make respectively, the traveling radius of experimental wheel 3 is 0.5m, is computed obtaining angular velocity respectively 212r/min, 424r/min, 637r/min, 849r/min that vertical pivot 5 should be reached by transverse axis 4 motoring ring test wheel 3;

The maximum sound level of the noise that experimental wheel 3 sends when step 5 two, record rotate at various speeds.

The above, it it is only presently preferred embodiments of the present invention, not the present invention is done any pro forma restriction, although the present invention is disclosed above with preferred embodiment, but it is not limited to the present invention, any those skilled in the art, without departing within the scope of technical solution of the present invention, when the technology contents of available the disclosure above makes a little change or is modified to the Equivalent embodiments of equivalent variations, in every case it is without departing from technical solution of the present invention content, technical spirit according to the present invention, within the spirit and principles in the present invention, the any simple amendment that above example is made, equivalent replacement and improvement etc., all still fall within the protection domain of technical solution of the present invention.

Claims (5)

1. a simulated automotive travels at micro-surface area road rumble indoor test device, it is characterized in that: described a kind of simulated automotive travels and includes base (1) at micro-surface area road rumble indoor test device, endless track (2), experimental wheel (3), transverse axis (4), vertical pivot (5), drive axle (6), lifting vertical pivot knob (7), driven gear (8), driving gear (9), hinged column base (10) and electromotor (11), endless track (2) is arranged on the upper surface of base (1), electromotor (11) is arranged in base (1), the lower end driving axle (6) is arranged on the middle part of base (1) inner bottom surface by hinged column base (10), driven gear (8) is sleeved in driving axle (6), driving gear (9) is sleeved on the rotation axle of electromotor (11), driving gear (9) engages with driven gear (8), the lower end of vertical pivot (5) is by lifting vertical pivot knob (7) and the upper end driving axle (6), one end of transverse axis (4) is connected with vertical pivot (5), the other end of transverse axis (4) is connected with experimental wheel (3), the upper surface of the wheel rim of experimental wheel (3) and endless track (2).

2. a kind of simulated automotive travels at micro-surface area road rumble indoor test device according to claim 1, it is characterized in that: endless track (2) is tested, by eight, the endless track (2) that mould (2-1) forms, the upper surface of base (1) is provided with the cannelure being made up of eight grooves (1-1), is embedded in test mould (2-1) in each groove (1-1) respectively.

3. a kind of simulated automotive according to claim 1 or claim 2 travels at micro-surface area road rumble indoor test device, it is characterized in that: described a kind of simulated automotive travels and also includes sound insulation lid (12) at micro-surface area road rumble indoor test device, sound insulation lid (12) spiral-lock is on endless track (2), and the lateral wall on the medial wall of sound insulation lid (12) bottom and base (1) top is threaded connection.

4. a kind of simulated automotive travels at micro-surface area road rumble indoor test device according to claim 3, it is characterized in that: described a kind of simulated automotive travels and also includes sound meter (13) and dividing plate (14) at micro-surface area road rumble indoor test device, dividing plate (14) is arranged on the inner side of endless track (2), and sound meter (13) is arranged on dividing plate (14).

5. one kind utilizes test unit simulation running car described in claim 1 at micro-surface area road rumble indoor test method, it is characterised in that: described a kind of simulated automotive travels specifically comprising the following steps that at micro-surface area road rumble indoor test method

Step one, assembling testing equipment: the micro-surfacing mixture being uniformly mixed poured in eight tests mould (2-1) and strike off rapidly, it is cooled to room temperature, eight is tested in the corresponding groove (1-1) that mould (2-1) embeds base (1) upper surface;

Step 2, experimental wheel (3) is arranged on the other end of transverse axis (4), makes the wheel rim of experimental wheel (3) just touch on micro-surface area runway;

Step 3, sound meter (13) is arranged on the upper surface of dividing plate (14), sound meter A spectrum overlapping characteristic and F time character of weighting are selected in the measurement of noise, select the maximum of sound meter to keep (HOLD) function under A weighting network;

Step 4, by sound insulation lid (12) spiral-lock on endless track (2), and make sound insulation lid (12) and base (1) by screw thread compact siro spinning technology;

Step 5, collection data:

Step 5 (one), startup electromotor (11), simulation real road travel speed, experiment with measuring wheel (3) speed reaches the noise that 20km/h, 40km/h, 60km/h, 80km/h make respectively, the traveling radius of experimental wheel (3) is 0.5m, is computed obtaining vertical pivot (5) and takes turns, by transverse axis (4) motoring ring test, angular velocity respectively 212r/min, 424r/min, 637r/min, 849r/min that (3) should reach;

The maximum sound level of the noise that experimental wheel (3) sends when step 5 (two), record rotate at various speeds.