CN1687733A - Method and system for speeding up combination of slope ejection for experiment of vehicle collision - Google Patents
Method and system for speeding up combination of slope ejection for experiment of vehicle collision Download PDFInfo
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- CN1687733A CN1687733A CN 200510077741 CN200510077741A CN1687733A CN 1687733 A CN1687733 A CN 1687733A CN 200510077741 CN200510077741 CN 200510077741 CN 200510077741 A CN200510077741 A CN 200510077741A CN 1687733 A CN1687733 A CN 1687733A
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Abstract
The invention discloses the ramp ejecting assembly accelerating system of the automobile striking test, which comprises the accelerating ramp, the automobile ejecting equipment, the automobile elevating device and the automobile orienting device. The said accelerating ramp is the slippery ground with grade and the orienting slot is in the center of the ground surface; the said ejecting device is the rubber line equipped at two sides of the ramp; the said automobile elevating device comprises the windlass set at the top of the ramp and the tractor; the said automobile orienting device comprises the guide slot in the central orienting slot and the guide cart on the guide track. The invention adds the ejecting equipment when the raising of the automobile.
Description
Technical field
The present invention relates to the apparatus and method that a kind of vehicle quickens, particularly the ramp in the experiment of vehicle collision and the method and the system and device thereof that launch the combination acceleration.
Background technology
Highway construction and automobile transportation fast development, in the highway construction develop rapidly, the also necessary synchronized development of road safety protective equipment, therefore, strengthen the experimental study of road safety protective equipment, the safe and reliable new road security protection facility that exploitation and current highway communication condition adapt reduces and avoids vehicle to weigh down serious accident generations such as precipice, alleviates the severe situation that highway traffic safety faces.
The road safety protective equipment is the safeguard structure of a kind of " just right ", the factor that influences its function is a lot, nonlinear relationship all again, singly be to be difficult to reach a conclusion, finally also must confirm whether its protective capacities satisfies the safety standard requirement with the full scale vehicle collision confirmatory experiment with theoretical analysis, Structure Calculation.This is one of basic skills of the generally acknowledged road safety protective equipment development research in countries in the world.The full scale vehicle collision experiment is a kind of " artificial traffic accident ", and one of key issue that realizes collision experiment is how will test the impact velocity that vehicle accelerates to regulation, and angle and the subject matter with regulation bumps against on appointed positions.Europe, the U.S., Japan etc. all make explicit provisions to the acceleration of experiment vehicle in the correlation technique rules.Can be summarized as follows:
1, speed control is accurate in the error range of experiment laws and regulations requirement, and this scope is: for the maximum tonnage 38t of oversize vehicle, top speed 80
0 + 7%Km/h; For dilly tonnage 1.5t, top speed 113
0 + 7%Km/h;
2, require attitude stabilization before the experiment vehicle collision road safety protective equipment, significantly do not wave, pitching, deflection etc., according to predetermined direction running and the restriction of any other means such as do not turned to;
3, safe, reliable, energy-conservation easy realization.
Satisfy above-mentioned requirements and from security consideration, driving the experiment vehicle by the driver, to finish collision experiment be impossible; The situation of the employing unmanned remote control technology that has, but require high to the dynamic property and the automatic control performance of experiment vehicle.Therefore at present main the employing from other power beyond the experiment vehicle quickened, as: travel in direct current generator traction, oil motor traction, trailer traction, ramp, elastic string launches, weight whereabouts etc.By contrast, direct current generator and oil motor cost an arm and a leg, for the oversize vehicle difficult in acceleration; Trailer traction speed control difficulty and for oversize vehicle traction is difficult to realize.It is very effective for oversize vehicle that quicken in the ramp, but bigger for improving the sloping height that rate request increases more than the 100km/h again, from table 1-1 as can be seen speed arrive 100 and quicken 20km/h more then to need to improve the slope high 22 meters, it is higher to implement cost.It is limited that common elastic string launches acceleration capacity, requires to be subjected to the scale restriction to be difficult to realize to oversize vehicle and high speed.
The slope that table 1 utilizes the acceleration capacity of the every raising of ramp accelerated mode 20km/h to increase is high
| The absolute altitude in ramp (m) | The ramp is to the acceleration capacity (km/h) of experiment vehicle | The slope high (m) that the acceleration capacity of every raising 20km/h need increase |
| ??0 | ??0 | ??- |
| ??2 | ??20 | ??2 |
| ??8 | ??40 | ??6 |
| ??18 | ??60 | ??10 |
| ??31 | ??80 | ??13 |
| ??48 | ??100 | ??17 |
| ??70 | ??120 | ??22 |
From above table as can be seen, when quickened in independent use ramp, the speed of desiring to reach 120km/h then need be up to 70 meters ramp, and economy is relatively poor.
Summary of the invention
The object of the present invention is to provide a kind of slope ejection combination accelerated method and accelerator thereof, to overcome the defective of existing single accelerated method.
The different characteristics of launching these two kinds of accelerated modes at ramp and elastic string, for giving full play to both advantages, reliable to develop, accurately, safety and satisfy the experiment vehicle accelerating system of road safety facility examination criteria, the inventor has furtherd investigate the associated methods of these two kinds of accelerated modes, and has developed the ramp combined vehicle accelerating system of additional catapult-launching gear on this basis.
The slope ejection combination accelerating system of experiment of vehicle collision of the present invention comprises and quickens ramp, vehicle catapult-launching gear, vehicle elevator and vehicle guidance device that described acceleration ramp is the smooth road with gradient, and road surface central authorities are provided with gathering sill; Described vehicle catapult-launching gear is to be arranged on the elastic string that the both sides, ramp are fixed at the two ends of epimere in the ramp; Described vehicle elevator comprises windlass and the trailer wagon that is arranged on the top, ramp, trailer wagon wherein be arranged on domatic on, itself have guiding trolley to link to each other with guide rail; Described vehicle guidance device comprises guide rail that is arranged in the central gathering sill and the guiding trolley that is arranged on the guide rail.
Described combination accelerating system is constituted by ramp and two kinds of accelerated modes of vehicle catapult-launching gear, and two kinds of accelerated modes can quicken for the experiment vehicle simultaneously; The ramp also can be quickened for the experiment vehicle separately; Catapult-launching gear only with the ramp combination condition under could be that the experiment vehicle quickens, catapult-launching gear is used for improving the acceleration capacity of ramp to vehicle.
Described ramp has certain altitude and can guarantee vehicle is accelerated to the speed that needs, and certain length is arranged to guarantee accelerator safety, steady; The ramp is made of straight line accelerating sections, curve accelerating sections, curve transition and flat slope stable section.
Described vehicle catapult-launching gear is by several elastic strings, the top stiff end, bottom turning rack and the fixed pulley that is installed on it, trolley pole guide rail and trolley pole constitute, one end of every elastic string is fixed on road surface one side on top, ramp by the top stiff end, and the fixed pulley that is provided for turning to of the road surface homonymy in a distance, top, distance ramp, the elastic string free end passes the side that fixed pulley on the turning rack is connected to the trolley pole that is arranged on the trolley pole guide rail, opposite side on the road surface is symmetrical arranged the same structure and the elastic string of number, the free end of elastic string is connected to the opposite side of the trolley pole on the trolley pole guide rail, trolley pole becomes the body that helps of vehicle, forms ejection zone between the elastic string turning rack of both sides, ramp and the trolley pole.
The windlass of described vehicle elevator is arranged on the top in ramp, and the wire rope that is provided for drawing; The head of the trailer wagon of described vehicle elevator is provided with pulley gear, afterbody is provided with trip mechanism, wherein the other end of the haulage cable of windlass passes pulley gear and is fixed on the top in ramp, and the trip mechanism of afterbody colludes when being used to draw to be hung the experiment vehicle and test being connected of vehicle and trailer wagon with throwing off before vehicle quickens.
The guide rail of described vehicle guidance device is to be arranged in the road surface central authorities gathering sill and the two guide rails road surface opposing parallel, and guiding trolley is arranged on this two guide rail, and is provided with locating slot at the top of guiding trolley, is used for and tests vehicle and be connected.
Described road surface central authorities gathering sill is the Buffer Pool of deep trouth shape in the afterbody setting of guide rail, and two guide rails are curved in Buffer Pool is bent downwardly, and is provided with energy dissipator in the end.
Slope ejection accelerated method of the present invention at first, with the top in the vehicle towed ramp to predetermined altitude of experiment, improves experiment vehicle gravitional force, and carrys additionally catapult-launching gear in the traction uphill process, the elastic potential energy of savings catapult-launching gear; Then, unhook rolling experiment vehicle, the experiment vehicle glides in the ramp, synergy lower edge of the elastic potential energy of self gravitation potential energy and catapult-launching gear, quickens; In quickening the downslide process, test not offset direction of vehicle by the guide piece control that is positioned on the ramp.
Launch accelerator owing on the basis of traditional ramp acceleration, increased, make acceleration effect better, can reach the acceleration request of the needed collision experiment of big dilly.Successfully developed in experiment field in this way and had 40 tons of the maximum tonnages of oversize vehicle, F-Zero 90km/h, to 1.8 tons of dillies, the additional catapult-launching gear ramp combination of the experiment vehicle of F-Zero 120km/h accelerating system.The acceleration capacity of this accelerating system and velocity control accuracy all satisfy the requirement that internal and international rules are quickened for road (safety) guard system test experience vehicle.Realize that with the ramp price that above-mentioned acceleration request needs will exceed this combined system cost more than 30% separately; And the independent acceleration capacity that almost can't realize having this system with catapult-launching gear.With other accelerated method as: direct current generator traction, oil motor traction, trailer traction, weight do not fall etc. and to compare, and this combination accelerated method also has special advantages aspect acceleration capacity, economy, the reliability.
Description of drawings
Fig. 1 is the vertical alignment synoptic diagram in ramp of the present invention;
Fig. 2 is the structural arrangement synoptic diagram that the present invention launches accelerator;
Fig. 3 is the cross-sectional configuration synoptic diagram in ramp of the present invention;
Fig. 4 is a guide piece structural representation of the present invention;
Fig. 5 is a gathering sill of the present invention end Buffer Pool structural representation;
Fig. 6 is a vehicle elevator structural representation of the present invention.
Embodiment
Slope ejection combination accelerating system of the present invention is that car ramp accelerating system and vehicle are launched a kind of accelerator of accelerating system combination.
As shown in Figure 1, ramp of the present invention itself is respectively straight line accelerating sections 1, curve accelerating sections 2, curve transition 3 and flat slope stable section 4 four parts by there being four sections to constitute.Ramp height and the length tentatively definite according to the ramp acceleration principle, the ramp vertical section of design, vehicle and subject matter bump in the process, and vehicle should be in horizontal movement state, promptly should have one section flat ramp surface to adjust the flat slope stable section 4 of running attitude before the collision.For making vehicle after descending acceleration, can steadily enter the flat slope stable section, need to be provided with curve transition 2 and 3 between ramp straight line accelerating sections 1 and the horizontal stable section 4 along the ramp.
Ramp design impact velocity depends on the choose reasonable of the ramp height and the gradient.The gravitional force of experiment vehicle should be converted into acceleration kinetic energy as much as possible.On certain height, the gradient is steep more, and length of grade is short, and kinetic energy rejection is more little, and the speed of a motor vehicle is just fast, but the gradient can have influence on the security and the operability of accelerator too suddenly again; The gradient is too slow, length of grade is big, and kinetic energy rejection is also big, and the speed of a motor vehicle is just slow; Here just there is the choose reasonable problem of the ramp height and the gradient.
Carry out the preresearch estimates design for height and length to the ramp, the accelerator of vehicle is reduced to uniformly accelrated rectilinear motion, there therefore have following equation to form to be upright:
V
t---the design rate that experiment vehicle in the end, slope should reach, km/h
V
0---at the initial velocity of the experiment vehicle on slope top, km/h
T---vehicle is running time on the ramp, s
The acceleration that a---vehicle is descending along the ramp, and a=(g-g ') sin α, g is an acceleration of gravity, g '---consider to roll and air resistance brief acceleration loss value, know that by Theoretical Calculation and practice experiment its value is at 1～2m/s
2In the scope;
Present embodiment, when getting α=30 °, a ≈ 4.15m/s
2, get V
t=27.8m/s (100km/h), V
0=0, then can solve: t=7.6s, S=93.1m by following formula.
This moment sloping high H
1=S sin α=48m
The primary design parameter value that we obtain the ramp by above analytical calculation is:
1) the ramp height should be more than 48.0m;
2) gradient in ramp is 60% (the domatic elevation angle is 31 °).
Be provided with as follows through above-mentioned each section of actual computation present embodiment:
The horizontal length of its cathetus accelerating sections 1 is 37.58m, and the gradient is 64.64% (with 32.82 ° at the surface level elevation angle), height H
DirectlyBe 24.24m, domatic physical length 44.72m, it is K0+000～+ 037.58 that pile No. is set;
Curve accelerating sections 2 (circular curve 1), radius is 161.09m, 41.56 meters of horizontal lengths, highly (H
Circle 1) be 19.08 meters, the domatic physical length of curve is 45.89m, pile No. is K0+37.58～+ 079.14;
Curve transition 3 (circular curve 2), radius is 150m, 42.6 meters of horizontal lengths, highly (H
Circle 2) be 6.18 meters, the domatic physical length of curve is 43.20m, pile No. is K0+079.14～+ 121.74;
Horizontal stable section 4, vehicle operating do not exist owing to quicken kinetic energy when the horizontal stable section, but the frictional resistance of resistance to rolling, vehicle transmission system and air resistance still exist, and car speed can descend to some extent, so the horizontal stable section is unsuitable long, gets 18.26m.
Ramp vertical section design net result is:
Ramp height H=H
Directly+ H
Circle 1+ H
Circle 2=24.24+19.08+6.18=49.5m;
Ramp horizontal length (S) is 140m, and road face physical length (L) is 152.07m;
32.82 ° of maximum elevations.
Through actual experiment, the experiment humping of cars that above-mentioned pits rampway structure can will be dragged to the top accelerates to 100km/h, but can not satisfy the acceleration request of 120km/h.The structure in ramp can satisfy the experiment vehicle and operate steadily in accelerator and after quickening.
Because the above-mentioned independent acceleration request that can not satisfy 120km/h with the ramp accelerating system, thereby increased again on the present invention basis of quickening in the ramp and launched accelerator, this catapult-launching gear is the India rubber rope that is arranged on the ramp epimere, A has indicated the installation site of catapult-launching gear on the ramp among the figure of ramp, is provided with several India rubber ropes in device of the present invention.As shown in Figure 2, the side on the road surface, an end of those elastic strings 6 is fixed on the top fixed support 9 that is positioned at top, ramp one side, and the other end passes the bottom turning rack 5 that fixed pulley 13 is housed as free end, is fixed on an end of trolley pole 11 after turning to again.Opposite side on the road surface, also as the said structure setting, elastic string passes the other end that is fixed on trolley pole from the fixed pulley 13 on the bottom turning rack 12, thereby makes trolley pole 11 become the body that helps of present embodiment.For making the go-cart better effects if of launching of the present invention, be that the both sides on road surface respectively are provided with a trolley pole guide rail 8 at the two ends of trolley pole 11, trolley pole guide rail 8 is used to control the running status of trolley pole 11.11 of trolley poles are slidingly connected by slide block 10 and guide rail 8.Also be provided with the impact damper 7 of alleviating elastic energy in the lower end of guide rail 8.
Long 50 meters have been used in the present embodiment, the elastic string that diameter is 26 millimeters.Elastic string bottom turning rack 5 is arranged on the both sides, road surface apart from 40 meters on top, ramp.Like this between turning rack 12 and 5 and trolley pole 11 just formed ejection zone.
Present embodiment is owing to only be provided with 50 meters long elastic strings, and its design maximum elongation amount is 30 meters, so be provided with 35 meters trolley pole guide rail 8.Elastic string quantity is being installed 8 (both sides install quantity and) when following in actual the use, elastic string 6 can be directly acted on the afterbody of experiment vehicle, elastic string to be acted on trolley pole 11 more than 8, and act on the afterbody of experiment vehicle again by trolley pole 11.
In the process that the experiment vehicle quickens, also must remain the stable of vehicle operating, most importantly predetermined direction can not be departed from, otherwise the big even the failure of an experiment of experimental data deviation will be made.The present invention also is provided with guide piece on the ramp, as shown in Figure 3, Figure 4, this guide piece is at first to be provided with gathering sill 17 with the ramp opposing parallel in the road surface in ramp 15 central authorities, and in this gathering sill 17, be provided with two parallel guide rails 18, on two parallel guide rails 18, guiding trolley 19 is set, this guiding trolley 19 will be along guide rail 18 operations, and the central part in the ramp slides forward, can offset direction.When experimentizing, with propons 22 guide grab 20 of burn-oning of experiment vehicle, guide grab 20 inserts locating slot 21 connections at the top that is positioned at guiding trolley 19, just can keep testing the travel direction of vehicle.And realized that plug connects and breaks away from automatically.
Testing vehicle ' to flat slope stable section 4, need experiment vehicle and guiding trolley 19 to break away from, special tail end at gathering sill 17 is provided with Buffer Pool 23, as shown in Figure 6, this Buffer Pool 23 is darker than gathering sill 17, in this Buffer Pool 23, guide rail 18 is also parallel with road surface 15, but is the camber line bending downwards.This realizes that in order to guarantee guiding trolley 19 and experiment vehicle break away from setting automatically, are provided with a kind of energy dissipator 24 again in the end of guide rail 18, i.e. the energy dissipating pad of being made by elastomeric material.And in this Buffer Pool 23, fill water, to absorb the kinergety of guiding trolley 19.
Certainly, quicken for the ramp of realizing vehicle, what can not lack will test the vehicle elevator that vehicle rises to the top, ramp in addition.As shown in Figure 6, this lifting gear comprises windlass 25 that is positioned at the top, ramp and the trailer wagon 27 that is arranged on the guide rail, and windlass can rise to the top, ramp with trailer wagon 27 by wire rope 26.And trailer wagon 27 afterbodys are provided with trip mechanism 28, are hooked on the afterbody of experiment vehicle when traction, will test vehicle and rise to the top, ramp, and before vehicle quickened, disengagement experiment vehicle was connected with trailer wagon.
The slope ejection combination accelerating system of this invention in use, at first will test vehicle and move to flat slope stable section 4, and welding guide grab 20 on the propons 22, in the locating slot 21 that guide grab 20 is inserted on the guiding trolley, the afterbody of testing vehicle is connected with the trip mechanism 28 of trailer wagon 27 again.At this moment start windlass 25, windlass just together rises to trailer wagon 27 and experiment vehicle the predetermined altitude in ramp.Car speed if desired just can not use catapult-launching gear in 100km/h, and directly trip mechanism 28 is broken away from, and makes the rolling of experiment vehicle nature, just can rely on the speed that vehicle potential energy reaches to be needed.
When the speed of needs during greater than 100km/h, then need use catapult-launching gear, the use-pattern of catapult-launching gear also has two kinds, and when not needing trolley pole 11, the afterbody that elastic string 6 is directly hung over the experiment vehicle gets final product.When needs use trolley pole 11, then elastic string 6 is hung on the trolley pole 11, trolley pole 11 contacts with experiment vehicle afterbody, in lifting process and rising simultaneously.In uphill process, elastic string 6 is elongated, thereby has put aside elastic potential energy.The elastic potential energy that elastic string 6 releases are put aside in humping of cars is to vehicle afterbody applied thrust, thereby the combination that accelerator and ramp accelerator are launched in realization improves the speed of testing vehicle.
The elastic string 6 that ejection system of the present invention uses can be most bars, can use 24 at most in the present embodiment, and each side in ramp can be used 12, vertically arranges, and can select the bar number of use according to factors such as vehicle, acceleration requests.
Accelerating system of the present invention can be according to vehicle and acceleration request different, determine to use the quantity of elastic string and the height that vehicle promotes by calculating, error meets the requirements substantially.
Existing 7 experiments are to carry out under the situation of catapult-launching gear being equipped with.These 7 times experiments, the speed of a motor vehicle that records (according to design object speed from low to high) is respectively: 101.87km/h, 104.18km/h, 107.44km/h, 112.1km/h, 116.7km/h, 117.6km/h, 120.6km/h.These experimental datas have proved fully that after additional catapult-launching gear has been installed the vehicle accelerating system can realize any preset vehicle speed from 100～120km/h.But elastic string is not installed to maximum quantity that system allows when carrying out these experiments, and vehicle is not mentioned the extreme higher position yet, and therefore, the acceleration capacity of the reality of this system will be higher than 120km/h, and Theoretical Calculation shows that the experiment acceleration capacity can reach 130km/h.
Combination accelerating system interpretation data see Table 2, have introduced two notions here, " elastic string provides the ability A of energy " and " the capacity usage ratio K of elastic string ".
Table 2 combination accelerating system experimental data
| Hoisting depth | Rubber | Actual measurement | Experiment | Vehicle/(vehicle+guiding | Energy is provided | Capacity usage ratio (%) | System |
| (centre of gravity place m) | The quantity of rope | Speed (km/h) | Date | Dolly+trolley pole quality) (t) | Ability (kJ/m)/length growth rate (%) | Single (%) | On average (%) | Structure type |
| ??44.3 | ??22 | ??120.6 | ??04.11.22 | Beautiful little visitor/1.76 | ??0.32/58 | ??50.31 | ??50.79 | Trolley pole is arranged |
| ??42.6 | ??22 | ??112.1 | ??04.11.26 | Beautiful little visitor/1.76 | ??0.24/46 | ??49.68 | ||
| ??43.5 | ??22 | ??116.7 | ??04.11.27 | Beautiful little visitor/1.76 | ??0.29/49 | ??51.55 | ||
| ??43.7 | ??22 | ??117.6 | ??04.12.4 | The little visitor in Mazda (Hong Kong road administration is put project)/1.83 | ??0.31/50 | ??51.62 | ||
| ??45.7 | ??4 | ??101.87 | ??05.3.9 | Beautiful little visitor/1.64 | ??0.3658/48 | ??61.23 | ??60.68 | No trolley pole |
| ??45 | ??8 | ??107.44 | ??05.3.15 | Beautiful little visitor/1.64 | ??0.3665/47 | ??59.40 | ||
| ??45.2 | ??6 | ??104.18 | ??05.3.16 | Beautiful little visitor/1.64 | ??0.3439/47.2 | ??61.40 |
" elastic string provides the ability A of energy " can be defined as under certain length growth rate condition, and each rice (length under free state) elastic string can offer the energy of experiment vehicle, and unit is kJ/m.From the experimental data of table 2 as can be seen, the size of this amount is subjected to the length growth rate of elastic string and the influence of catapult-launching gear structure.Under the certain situation of catapult-launching gear structure, the A value of same elongation is more approaching; Under the situation of different length growth rates, the A value is directly proportional with the length growth rate of elastic string, but is subjected to extending the restriction of the limit, and the A value can not infinitely increase.From the experiment of being done (comprising model experiment), the A value is between 0.2～0.4kJ/m.This amount can be used for the primary Calculation catapult-launching gear radical of elastic string need be installed.After the object of experiment speed of a motor vehicle is determined, the energy that needs catapult-launching gear to provide can roughly be provided, go out the quantity of needs elastic string then according to the A value range computation of this structure.
" the capacity usage ratio K of elastic string ", it can be defined as the experiment vehicle launches the energy that energy and elastic string had that is obtained from elastic string ratio.What its reflected is the work efficiency of catapult-launching gear, can be used for estimating the quality of catapult-launching gear ruuning situation.By the pulling force of elastic string and the stretching experiment of elongation relation, can determine the energy that elastic string has; But because elastic string itself has weight, elastic string quickens for self when quickening for the experiment vehicle again, add the friction loss of catapult-launching gear etc., so the experiment vehicle is the part of the energy that has of elastic string from the energy that catapult-launching gear obtained, with " the capacity usage ratio K of elastic string ", represent.Facts have proved that it is reliable utilizing the K value with same structure form catapult-launching gear to calculate the quantity and the elongation that need elastic string when testing next time.Prove also that simultaneously the version of catapult-launching gear is bigger to the influence of K value.For the catapult-launching gear K ≈ 0.50 that trolley pole is installed, and for the situation K ≈ 0.60 that does not have trolley pole.Along with the increase of experiment number, the K value can further be revised, and speed control can be more accurate.
Table 3 combination accelerating system speed control error
| Date | Predetermined speed (km/h) | Actual measurement speed (km/h) | Absolute error (km/h) | Relative error (%) |
| ??04.11.22 | ??115 | ??120.6 | ??5.6 | ??5 |
| ??04.11.26 | ??113 | ??112.1 | ??0.9 | ??0.8 |
| ??04.11.27 | ??115 | ??116.7 | ??1.7 | ??1.5 |
| ??04.12.04 | ??115 | ??117.6 | ??2.6 | ??2.2 |
As can be seen from Table 3, the error of combination accelerating system of the present invention can be controlled within the limits prescribed.
Claims (8)
1. the slope ejection of experiment of vehicle collision combination accelerating system comprises and quickens ramp, vehicle catapult-launching gear, vehicle elevator and vehicle guidance device, and described acceleration ramp is the smooth road with gradient, and road surface central authorities are provided with gathering sill; Described vehicle catapult-launching gear is to be arranged on the India rubber rope that both sides, road surface, ramp are fixed at the two ends of epimere in the ramp; Described vehicle elevator comprises windlass and the trailer wagon that is arranged on the top, ramp; Described vehicle guidance device comprises guide rail that is arranged in the central gathering sill and the guiding trolley that is arranged on the guide rail.
2. the slope ejection of experiment of vehicle collision according to claim 1 makes up accelerating system, and it is characterized in that: described combination accelerating system is constituted by ramp and two kinds of accelerated modes of catapult-launching gear, and two kinds of accelerated modes can quicken for the experiment vehicle simultaneously; The ramp also can be quickened for the experiment vehicle separately; Catapult-launching gear only with the ramp combination condition under could be that the experiment vehicle quickens, catapult-launching gear is used for improving the acceleration capacity of ramp to vehicle.
3. the slope ejection of experiment of vehicle collision according to claim 2 makes up accelerating system, and it is characterized in that: described ramp has the speed that certain altitude can guarantee vehicle is accelerated to needs, certain length is arranged to guarantee accelerator safety, steady; The ramp is made of straight line accelerating sections, curve accelerating sections, curve transition and flat slope stable section.
4. the slope ejection of experiment of vehicle collision according to claim 2 makes up accelerating system, it is characterized in that: described vehicle catapult-launching gear is by several elastic strings, the top fixed support, bottom turning rack and the fixed pulley that is installed on it, trolley pole guide rail and trolley pole constitute, one end of every elastic string is fixed on road surface one side on top, ramp by the top fixed support, and the fixed pulley that is provided for turning to of the road surface homonymy in a distance, top, distance ramp, the elastic string free end passes the side that fixed pulley on the turning rack is connected to the trolley pole that is arranged on the trolley pole guide rail, opposite side on the road surface is symmetrical arranged the same structure and the elastic string of number, the free end of elastic string is connected to the opposite side of the trolley pole on the trolley pole guide rail, trolley pole becomes the body that helps of vehicle, forms ejection zone between the elastic string turning rack of both sides, ramp and the trolley pole.
5. the slope ejection of experiment of vehicle collision according to claim 1 makes up accelerating system, and it is characterized in that: the windlass of described vehicle elevator is arranged on the top in ramp, and the wire rope that is provided for drawing; The head of the trailer wagon of described vehicle elevator is provided with pulley gear, afterbody is provided with trip mechanism, wherein the other end of the haulage cable of windlass passes pulley gear and is fixed on the top in ramp, and the trip mechanism of afterbody colludes when being used to draw to be hung the experiment vehicle and test being connected of vehicle and trailer wagon with throwing off before vehicle quickens.
6. the slope ejection of experiment of vehicle collision according to claim 1 makes up accelerating system, it is characterized in that: the guide rail of described vehicle guidance device is to be arranged in the road surface central authorities gathering sill and the two guide rails road surface opposing parallel, guiding trolley is arranged on this guide rail, and be provided with locating slot at the top of guiding trolley, be used for being connected with the experiment vehicle.
7. the slope ejection of experiment of vehicle collision according to claim 6 makes up accelerating system, it is characterized in that: described road surface central authorities gathering sill is the Buffer Pool of deep trouth shape in the afterbody setting of guide rail, guide rail is curved in Buffer Pool is bent downwardly, and is provided with energy dissipator in the end.
8. the slope ejection of experiment of vehicle collision combination accelerated method at first, with the vehicle towed predetermined altitude to the ramp of experiment, improves experiment vehicle gravitional force, and carrys additionally catapult-launching gear in the traction uphill process, the elastic potential energy of savings catapult-launching gear; Then, unhook rolling experiment vehicle, the experiment vehicle glides in the ramp, synergy lower edge of the elastic potential energy of self gravitation potential energy and catapult-launching gear, and potential energy is converted into kinetic energy, quickens; In quickening the downslide process, test not offset direction of vehicle by the guide piece control that is positioned on the ramp.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507798A (en) * | 2017-12-27 | 2018-09-07 | 南昌大学 | Trolley accelerator on I-beam |
| CN109322805A (en) * | 2018-10-15 | 2019-02-12 | 新元风洞（镇江）有限公司 | A kind of object accelerator |
| CN109357830A (en) * | 2018-11-23 | 2019-02-19 | 江西洪都航空工业集团有限责任公司 | Highway transportation test measurement equipment |
-
2005
- 2005-06-24 CN CNB2005100777410A patent/CN100529710C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507798A (en) * | 2017-12-27 | 2018-09-07 | 南昌大学 | Trolley accelerator on I-beam |
| CN108507798B (en) * | 2017-12-27 | 2023-12-22 | 南昌航空大学 | Trolley accelerating device on I-beam |
| CN109322805A (en) * | 2018-10-15 | 2019-02-12 | 新元风洞（镇江）有限公司 | A kind of object accelerator |
| CN109357830A (en) * | 2018-11-23 | 2019-02-19 | 江西洪都航空工业集团有限责任公司 | Highway transportation test measurement equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100529710C (en) | 2009-08-19 |
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