CN102768119B - Automobile safety air bag unfolding speed and acceleration test buffering device - Google Patents
Automobile safety air bag unfolding speed and acceleration test buffering device Download PDFInfo
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- CN102768119B CN102768119B CN201210281338.XA CN201210281338A CN102768119B CN 102768119 B CN102768119 B CN 102768119B CN 201210281338 A CN201210281338 A CN 201210281338A CN 102768119 B CN102768119 B CN 102768119B
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Abstract
The invention discloses an automobile safety air bag unfolding speed and acceleration test buffering device which comprises a buffering cavity left plate, a rotary encoder, a buffering cavity cover board, a buffering cavity right plate, a rotating shaft, an acceleration sensor, a coupling, a buffering cover board, a buffering cavity front plate and a throttling valve. One narrow edges of the buffering cavity left plate and the buffering cavity right plate are connected with the inner lateral surface of the buffering cavity cover board by screws; the buffering cavity front plate is connected with the other narrow edges of the buffering cavity left plate and the buffering cavity right plate by screws; the buffering cover board is fixedly connected with the rotating shaft; the rotating shaft is arranged at the top end of the buffering cavity front plate by a buffering cavity left bearing seat, a buffering cavity right bearing seat and a rolling bearing; the coupling is arranged at the left end of the rotating shaft; a positioning block is arranged at the upper end of the buffering cavity front plate; bottom end positioning plates are arranged at the bottom ends of the left side of the buffering cavity left plate and the right side of the buffering cavity right plate; the input end of the rotary encoder is connected with the coupling; the acceleration sensor is arranged on the buffering cover board; and the throttling valve is arranged on the buffering cavity front plate.
Description
Technical field
The present invention relates to the proving installation of the static expansion process of a kind of safe automobile air bag.The test snubber assembly that speed when more particularly, the present invention relates to a kind of record and simulated automotive air bag and dynamically launch and acceleration are assessed safe automobile air bag correlated performance.
Background technology
Along with the surge of automobile quantity and the raising of the speed of a motor vehicle, it is frequent and serious that traffic hazard becomes, and the security of automobile is valued by the people day by day.Safe automobile air bag is supplementary constraints system and the matching used security system of three-point safety belt.Effect is the secondary collision injury that the huge inertial force that brings causes driver and conductor of reduce colliding, and relaxes the impact that occupant is subject to and also absorbs collision energy, protection driver and conductor safety.Safe automobile air bag is divided into again the kinds such as DAB, PAB, SAB, PAS, CAB, ECU.
Safe automobile air bag is generally comprised of sensor (sensor), ECU (Electrical Control Unit) (ECU), gasbag (bag), gas generator (inflator), support etc.When the collision of automobile makes momentum that sensor is subject to surpass setting, ECU (Electrical Control Unit) is sent a trigger pulse to gas generator, trigger the detonator in gas generator, blasting cap detonation punctures the fuel cassette of dress gas generator, fixed fuel is lighted and is produced high temperature and high pressure gas (nitrogen), high temperature and high pressure gas is fast by filtrator, is filtered after cooling and pours gasbag.Gasbag expands rapidly in 20～50ms, washes air bag cover plate and instrument panel open and launches, with driver and conductor's safety in securing band mating protection car.
The static expansion test of air bag in GB/T 19949.2-2005/ISO 12097-2:1996 is design vehicle air bag and the indispensable experiment of checking safe automobile air bag performance.Static initial velocity and the initial acceleration of launching the main measured automobiles air-bag deployment of test of safe automobile air bag, the material, method for folding and the different gas generators that its objective is test gasbag launch the impact of combination property on gasbag, calculate the dynamics that gasbag launches, whether checking safe automobile air bag is qualified.Simultaneously also for body frame and instrument panel design provide needed critical data.
Comprehensive GB/T 19949.2-2005/ISO 12097-2:1996 provides safe automobile air bag static test method and the domestic prior art launched, the static test employing high-speed camera that launches of gasbag records the process that whole gasbag launches, by image treating and limited element analysis technique, calculate change of shape amount, speed and the acceleration that gasbag launches, other parameters that need by these numerical evaluation testing automobile air bags; The method experimentation cost is high, calculated amount is large, process is loaded down with trivial details, test bit and actual value exist error, can not deal with the test assignment of miscellaneous safe automobile air bag.
Summary of the invention
Technical matters to be solved by this invention be overcome that prior art exists that experimentation cost is high, calculated amount is large, process is loaded down with trivial details, there is error in test bit and actual value, can not deal with the problem of the test assignment of miscellaneous safe automobile air bag, a kind of safe automobile air bag development rate and acceleration test snubber assembly are provided.
For solving the problems of the technologies described above, the present invention adopts following technical scheme to realize: safe automobile air bag development rate and acceleration test snubber assembly are comprised of mechanical part and control section.Described mechanical part comprises 2 bottom location-plate, cushion chamber left plate, rotary encoder, cushion chamber cover plate, reinforcement location-plate, cushion chamber right plate, rotating shaft, acceleration transducer, location-plate, sensor support post, shaft coupling, cushion chamber left-hand axis bearing, cushion chamber right-hand axis bearing, buffering cover plate, locating piece, cushion chamber header board and throttling valve that structure is identical.
The cushion chamber left plate being parallel to each other is connected with the medial surface screw of a narrow end surface of cushion chamber right plate and cushion chamber cover plate, cushion chamber header board is connected with another narrow end surface screw of cushion chamber right plate with the cushion chamber left plate being parallel to each other, the medial surface top rail of cushion chamber cover plate is equipped with reinforcement location-plate, buffering cover plate adopts screw to be fixedly connected with rotating shaft with pin, rotating shaft is by being arranged on the cushion chamber left-hand axis bearing on cushion chamber left plate and cushion chamber right plate, cushion chamber right-hand axis bearing and 2 identical rolling bearings of structure are arranged on the top of cushion chamber header board, the left end of rotating shaft is provided with shaft coupling, the position that is positioned at buffering cover plate below of cushion chamber header board upper end is provided with locating piece, the left side of cushion chamber left plate adopts bolt that the bottom location-plate that structure is identical is installed with the bottom on the right side of cushion chamber right plate, the employing sensor support post that rotary encoder is arranged on rotating shaft left side is arranged on the location-plate on cushion chamber left plate, the input end of rotary encoder is connected with the shaft coupling of rotating shaft left end, on buffering cover plate, acceleration transducer is installed, throttling valve is arranged on cushion chamber header board.
Cushion chamber left plate described in technical scheme is the plate structure part that structure is identical with cushion chamber right plate, and cushion chamber left-hand axis bearing is the disc-like structural member that structure is identical with cushion chamber right-hand axis bearing.
Rotating shaft described in technical scheme is a multidiameter class formation part, rotating shaft left end is arranged to the shaft coupling axle equipped with shaft coupling, rotating shaft right-hand member is arranged to tetragonal body or hexahedron, tetragonal body or hexahedron and shaft coupling axle inboard are respectively arranged with and 2 equipped bearing shaft of bearing that structure is identical, the diameter of tetragonal body or hexahedron is less than the diameter of bearing shaft and is greater than the diameter of shaft coupling axle, between two sections of bearing shaft, for installation, cushion the buffering plate shaft of cover plate, the diameter of buffering plate shaft is greater than the diameter of bearing shaft, the buffering plate shaft bearing shaft adjacent with its two ends forms respectively the shaft shoulder playing the role of positioning, on buffering plate shaft, be provided with vertically from left to right the groove of U font, buffering plate shaft is evenly equipped with vertical countersunk head tapped through hole and the tapered dowel through hole of two elongated slot walls with the groove of U font from top to bottom.
Buffering cover plate described in technical scheme adopts screw to be fixedly connected with and to refer to rotating shaft with pin: insert in the groove of the U font in rotating shaft buffering cover plate one end, adopts pin to be located by connecting, and adopts screw to be fixedly connected with.
Compared with prior art the invention has the beneficial effects as follows:
1. safe automobile air bag development rate of the present invention and acceleration test snubber assembly can be applicable to design and the test of safe automobile air bag, the impact that the method for folding of assessment gasbag and gas generator launch gasbag, and simultaneously for body of a motor car skeleton, seat, instrument panel etc. provide important design parameter.
2. safe automobile air bag development rate of the present invention and acceleration test snubber assembly are initial velocity and the initial accelerations of key point motion on gasbag when testing that gasbag is static to launch.The initial velocity that safe automobile air bag launches and initial acceleration are delivered on buffering cover plate, are converted into angular velocity and the acceleration of buffering cover plate upset.
3. safe automobile air bag development rate of the present invention and acceleration test snubber assembly can be realized two-freedom adjustment, be that jacking gear is equipped with in safe automobile air bag development rate and acceleration test snubber assembly bottom, can be according to the distance of requirement of experiment adjustment buffering cover plate and safe automobile air bag upper surface; Safe automobile air bag development rate and acceleration test snubber assembly can move forward and backward, and in order to adjust acceleration transducer on buffering cover plate, overlap with safe automobile air bag upper surface test point.Make safe automobile air bag development rate and acceleration test snubber assembly adapt to safe automobile air bag test experiments dissimilar and that different experiments requires.
4. safe automobile air bag development rate of the present invention and acceleration test snubber assembly are designed with buffering protection function, absorb the kinetic energy of buffering cover plate after completing test, the integrality of protection buffering cover plate.The initial position of the buffering cover plate in device is parallel to surface level, from one end of installation rotary encoder, sees and is rotated counterclockwise 270 °, and Validity Test scope is 0 °-120 °, and 120 °-270 ° is buffer stage.
5. the buffering cover plate in safe automobile air bag development rate of the present invention and acceleration test snubber assembly adopts lightweight and firm metal to form, and design weight is generally at 3.0kg/m
2～4.5kg/m
2.When safe automobile air bag is static while launching, the motion that matches with safe automobile air bag expansion restraining plate of buffering cover plate, is used for imitating the constraint process of automobile instrument panel when safe automobile air bag launches.
6. the cushion chamber header board in safe automobile air bag development rate of the present invention and acceleration test snubber assembly installs throttling valve additional, for the air pressure in cushion chamber, plays adjusting, by the control of gas flow being completed to the buffer protection function to buffering cover plate.
7. safe automobile air bag development rate of the present invention and acceleration test snubber assembly adopt high-speed synchronous data acquiring card to complete the synchronous acquisition to angular velocity and acceleration transducer signals as the core of data acquisition process part, greatly improve sample rate and the precision of safe automobile air bag development rate and acceleration test snubber assembly, shortened the development time, reduce cost of development, improved the reliability of safe automobile air bag development rate and acceleration test snubber assembly.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated:
Fig. 1 is the shaft side projection drawing of safe automobile air bag development rate of the present invention and acceleration test snubber assembly;
Fig. 2 is the front view that safe automobile air bag development rate of the present invention and acceleration test buffer unit structure form;
Fig. 3 is the full sectional view on the right view that forms of safe automobile air bag development rate of the present invention and acceleration test buffer unit structure;
Fig. 4 is the axonometric projection graph of safe automobile air bag development rate of the present invention and acceleration test snubber assembly and instrument panel combination;
Fig. 5 is the structural principle block diagram of control section in safe automobile air bag development rate of the present invention and acceleration test snubber assembly;
In figure: 1. bottom location-plate, 2. cushion chamber left plate, 3. rotary encoder, 4. cushion chamber cover plate, 5. strengthens location-plate, 6. cushion chamber right plate in chamber, 7. rotating shaft, 8. acceleration transducer, 9. base plate, 10. location-plate, 11. sensor support posts, 12. shaft couplings, 13. cushion chamber left-hand axis bearings, 14. cushion chamber right-hand axis bearings, 15. buffering cover plates, 16. cover plate locating pieces, 17. cushion chamber header boards, 18. throttling valve.
Embodiment
Below in conjunction with accompanying drawing, the present invention is explained in detail:
Safe automobile air bag development rate of the present invention and acceleration test snubber assembly are for testing automobile air bag is static while launching on gasbag initial velocity and the initial acceleration of key point motion.In safe automobile air bag development rate and acceleration test snubber assembly, be provided with rotary encoder (angular-rate sensor) and acceleration transducer 8, be used for the initial velocity of measured automobiles air-bag deployment and initial acceleration to convert initial angle speed and the initial acceleration of 15 upsets of buffering cover plate to.The initial angle speed that safe automobile air bag development rate of the present invention and acceleration test snubber assembly are measured and initial acceleration are method for folding and the impact of gas generator on airbag deployment of assessment gasbag, the important parameter of the physical construction of design vehicle air bag and body of a motor car skeleton, seat, instrument panel etc.
Described safe automobile air bag development rate and acceleration test snubber assembly mainly contain two aspect functions, be when safe automobile air bag launches on the one hand, the initial velocity that safe automobile air bag is launched and initial acceleration are converted into initial angle speed and the initial acceleration of buffering cover plate 15 upsets; Be that buffering cover plate 15 is played to buffering protection function on the other hand, absorb the kinetic energy of buffering cover plate 15 after completing test, the integrality of protection buffering cover plate 15, makes experiment have repetition contrast property.
Consult Fig. 1 to Fig. 3, safe automobile air bag development rate of the present invention and acceleration test snubber assembly are comprised of mechanical part and control section.Described mechanical part comprises cushion chamber (cushion chamber left plate 2, cushion chamber cover plate 4, reinforcement location-plate 5, cushion chamber right plate 6 and cushion chamber header board 17), bottom location-plate 1, rotary encoder (angular-rate sensor) 3, rotating shaft 7, acceleration transducer 8, location-plate 10, sensor support post 11, shaft coupling 12, cushion chamber left-hand axis bearing 13, cushion chamber right-hand axis bearing 14, buffering cover plate 15, locating piece 16 and throttling valve 18.
Described safe automobile air bag development rate and cushion chamber compactness firm in structure and the leakproofness in acceleration test snubber assembly are good.The plate structure part that buffering cover plate 15 is rectangle, buffering cover plate 15 1 long edge positions are evenly equipped with the through hole of tapered dowel through hole and mounting screw, the center of buffering cover plate 15 is provided with the tapped through hole that acceleration transducer 8 is installed, buffering cover plate 15 adopts lightweight and firm metal to form, the air bag cover plate being used on emulation automobile instrument panel.Design weight is generally at 3.0kg/m
2～4.5kg/m
2.Recommend adoption honeycomb aluminum plate.
Described cushion chamber left plate 2, cushion chamber cover plate 4, reinforcement location-plate 5, cushion chamber right plate 6 and cushion chamber header board 17 have formed the cushion chamber in safe automobile air bag development rate and acceleration test snubber assembly.Exactly, cushion chamber left plate 2 is the plate structure part that structure is identical with cushion chamber right plate 6, the cushion chamber left plate 2 being arranged in parallel is connected with the medial surface screw of a narrow end surface of cushion chamber right plate 6 and cushion chamber cover plate 4, cushion chamber header board 17 is connected with another narrow end surface screw of cushion chamber right plate 6 with the cushion chamber left plate 2 being parallel to each other, reinforcement location-plate 5 has been installed on the medial surface of cushion chamber cover plate 4, has been improved intensity and the assembly precision of cushion chamber.Screw and pin are connected as a single entity buffering cover plate 15 and rotating shaft 7.Rotating shaft 7 is fixedly mounted on the top of cushion chamber header board 17 in cushion chamber by being arranged on cushion chamber left plate 2 and cushion chamber left-hand axis bearing 13 on cushion chamber right plate 6, cushion chamber right-hand axis bearing 14 and 2 identical rolling bearings of structure.Wherein: cushion chamber left-hand axis bearing 13 is the disc-like structural member that structure is identical with cushion chamber right-hand axis bearing 14.Adopt rolling bearing to reduce the friction force that rotating shaft 7 rotations produce, improve the measuring accuracy of whole safe automobile air bag development rate and acceleration test snubber assembly.In rotating shaft 7, be processed with elongated slot vertically, the sidewall direction of vertical elongated slot is processed with countersunk head threaded hole and tapered dowel hole, is used for rotating shaft 7 and buffering cover plate 15 to be linked into an integral body.One end of rotating shaft 7 (left side) is processed into and can be coordinated with shaft coupling 12 the shaft coupling axle of installing, and the other end is processed into square toes and is used for assembly wrench, and effect is to rotate buffering cover plate 15 to reset.Locating piece 16 is installed in the position that is positioned at buffering cover plate 15 belows of cushion chamber header board 17 upper ends, is used for adjusting the initial position of buffering cover plate 15, makes its maintenance level.The bottom of the cushion chamber left and right sides is that the bottom on the left side of cushion chamber left plate 2 and the right side of cushion chamber right plate 6 adopts screw to be installed with bottom location-plate 1, by bottom location-plate 1, safe automobile air bag development rate and acceleration test snubber assembly is fixed on to the base plate 9(Lifting platform in jacking gear) on.On bottom location-plate 1, be provided with rectangular through hole, safe automobile air bag development rate and acceleration test snubber assembly can be moved along directions X, the acceleration transducer 8 of adjusting on buffering cover plate 15 overlaps with safe automobile air bag upper surface test point.Safe automobile air bag development rate and acceleration test snubber assembly bottom are arranged on the base plate 9(Lifting platform in jacking gear) upper, the distance by jacking gear adjustment buffering cover plate 15 with safe automobile air bag upper surface.
Described safe automobile air bag development rate and the rotary encoder (angular-rate sensor) 3 in acceleration test snubber assembly are arranged on the location-plate 10 that is positioned at cushion chamber left plate 2 left sides, the input shaft of rotary encoder (angular-rate sensor) 3 is connected with the shaft coupling axle of rotating shaft 7 left ends by shaft coupling 12, can measure angle and the angular velocity of 15 rotations of buffering cover plate.Because experimentation is short, reaction is fast, the general positive coupling that adopts of shaft coupling 12, synchronism and the rapidity of assurance rotary encoder (angular-rate sensor) 3 tests.Location-plate 10 is fixed by screws on the left end of three sensor support posts 11.Sensor support post 11 one end machining internal threads, other end threading, three sensor support posts 11 are distributed in take on the cylindrical that the spindle central of angular-rate sensor (rotary encoder) 3 is radius, improves the concentricity of rotary encoder (angular-rate sensor) 3 and rotating shaft 7.Sensor support post 11 external thread one (right side) ends can replace screw that cushion chamber left-hand axis bearing 13 is fixed on cushion chamber left plate 2, and the input shaft of rotary encoder (angular-rate sensor) 3 is overlapped with the rotation centerline of rotating shaft 7.On buffering cover plate 15, acceleration transducer 8 is installed, is used for measuring the instantaneous acceleration of buffering cover plate 15.
Described rotating shaft 7 is multidiameter class formation parts, and it consists of following several parts: rotating shaft 7 left ends are arranged to the shaft coupling axle equipped with shaft coupling 12, and diameter dimension is minimum, and rotating shaft 7 right-hand members are arranged to tetragonal body or hexahedron, are convenient to coordinate with spanner.Tetragonal body or hexahedron are respectively arranged with shaft coupling axle inboard the bearing shaft that the equipped structure of the bearing identical with structure is identical.The diameter of tetragonal body or hexahedron is less than the diameter of bearing shaft and is greater than the diameter of shaft coupling axle.Between the identical bearing shaft of two-stage structure for the buffering plate shaft of buffering cover plate 15 is installed, buffering cover plate shaft diameter is maximum, be greater than the diameter of bearing shaft, the buffering plate shaft bearing shaft adjacent with its two ends forms respectively the shaft shoulder playing the role of positioning, and two shaft shoulders respectively bearing inner ring end contact identical with structure are connected and realize axial location.The axis of rotation of the axis of symmetry of the axis of rotation of shaft coupling axle, tetragonal body or hexahedron, 2 sections of bearing shaft and the axis of rotation conllinear that cushions plate shaft.On buffering plate shaft, be provided with vertically from left to right the groove of U font, two elongated slot walls of the groove of U font are parallel to each other and are vertical with groove bottom, two elongated slot walls of groove are parallel with the axis of rotation of rotating shaft 7 with groove bottom, and two elongated slot walls of the groove of U font are symmetrical arranged with respect to the axis of rotation of rotating shaft 7.Buffering plate shaft is evenly equipped with vertical countersunk head tapped through hole and the tapered dowel through hole of two elongated slot walls with the groove of U font from top to bottom.Insert in the groove of the U font in rotating shaft 7 buffering cover plate 15 one end, then adopts pin and screw to position with fixing.
Consult Fig. 4, on described safe automobile air bag development rate and the buffering cover plate 15 in acceleration test snubber assembly, can combine with the restraining plate of airbag deployment, to fascia, seat outside surface carries out emulation.When the object of testing is to imitate safe automobile air bag to break through instrument panel, push the process of automobile safe airbag lid plate development open, test air bag cover plate, the impact that the external factor such as instrument panel are launched safe automobile air bag, for the overall design of safe automobile air bag provides parameter.
Described safe automobile air bag development rate and the course of work of acceleration test snubber assembly:
Buffering cover plate 15 is turned to initial position cushions cover plate 15 and is opened to horizontal level, adjust the position of safe automobile air bag development rate and acceleration test snubber assembly directions X and be fixed on the base plate 9 in testing table elevating mechanism, the acceleration transducer 8 that makes to cushion on cover plate 15 overlaps with safe automobile air bag upper surface central point.Buffering cover plate 15 can, according to requirement of experiment, be adjusted by testing table elevating mechanism with the spacing of safe automobile air bag upper surface in Z direction.When the moment of air-bag deployment, buffering cover plate 15 is subject to the impulsive force that gasbag instantaneous expansion produces, and starts High Rotation Speed.Now, acceleration transducer 8 and rotary encoder (angular-rate sensor) 3 starts acceleration and the magnitude of angular velocity of acquisition buffer cover plate 15.The motion process of the buffering cover plate 15 in safe automobile air bag development rate and acceleration test snubber assembly is divided into 3 stages: i.e. test phase, buffer stage and recovery stage.Test phase scope is at 0 °-120 °, this stage is imitated the motion process of automobile instrument panel air bag cover plate when safe automobile air bag launches, the angular velocity and the acceleration that after the impulsive force that the initial velocity that during the static expansion of testing automobile air bag, on gasbag, key point is moved and acceleration and buffering cover plate 15 are launched by gasbag, overturn.Buffer stage is at 120 °-180 °, and effect is the kinetic energy of absorption buffering cover plate 15 after completing test, and protection buffering cover plate 15 utilizes air in chamber that the Speed Reduction of buffering cover plate 15 is arrived to zero.Recovery stage is at 180 °-270 °, and buffering cover plate is fallen by free gravity rotation, turns to final position.
Cushion chamber header board 17 centers are provided with throttling valve 18, and effect is at buffer stage, by controlling cushion chamber, to get rid of the flow of gas, regulates the air pressure difference in cushion chamber and outside cushion chamber, reaches the buffering protection function to buffering cover plate 15.
The circular arc center of circle of the cushion chamber cover plate 4 in cushion chamber and the rotation center decentraction that cushions cover plate 15, make to cushion cover plate 15 with respect to cushion chamber cover plate 4 eccentric rotaries in cushion chamber.The arc track of buffering cover plate 15 motions forms a spiral of Archimedes with respect to the circular arc center of circle of cushion chamber cover plate 4, cushions cover plate 15 and with the anglec of rotation, increases and diminish gradually, so better enhancing buffering effect with the gap of cushion chamber cover plate 4.
The design size of cushion chamber, vent port size and gap and internal and external equilibrium pressure differential can be by converting and draw with next group fluid mechanics computing formula.
When buffering cover plate 15 rotates under buffer status, formula is passed through in the variation of cushion chamber internal gas pressure:
Gas pressure intensity in p-cushion chamber, the .Pa of unit;
Gas volume in v-cushion chamber, the .mm of unit
3;
Gas temperature in T-cushion chamber, unit. ℃;
K-constant
When buffering cover plate 15 rotates under buffer status, the variation formula of cushion chamber energy:
E
k＝∫Δp·△v·dα （2）
E
kenergy in-cushion chamber, the J of unit;
The air pressure change value of △ p-cushion chamber, the Pa of unit;
△ v-cushion chamber inner volume changing value, the mm of unit
3;
The anglec of rotation of α-buffering cover plate, the rad of unit;
When buffering cover plate 15 rotates under buffer status, the variation formula of cushion chamber pore flow:
Q-gas flow, the m of unit
3/ h;
C
d-coefficient of flow
A
0-vent port area, the m of unit
2;
△ p-cushion chamber external and internal pressure is poor, the Pa of unit;
ρ-gas density, units/kg/m
3;
Described safe automobile air bag development rate and the cushioning principle of acceleration test snubber assembly:
Whole safe automobile air bag development rate and acceleration test snubber assembly are equivalent to an accumulator, by the kinetic transformation of buffering cover plate 15, are gas compression energy.The vent port of the throttling valve 18 that pressure gas is installed by cushion chamber header board 17 centers is discharged, and consumes the gas compression energy in cushion chamber, reduces the speed of buffering cover plate 15.Make to cushion cover plate 15 when moving to final position, kinetic energy reduces to can not destroy buffering cover plate 15.In cushion chamber, gas pressure intensity changing value can be obtained by formula (1), and obtain the compression energy in chamber by formula (2), and be aided with law of conservation of energy and set up energy equilibrium formula, relation between balance compression energy, kinetic energy and loss heat energy thereof, finally can calculate the size of cushion chamber required vent port when reaching balance by formula (3).By above equation, can calculate the relevant design parameter of cushion chamber in safe automobile air bag development rate and acceleration test snubber assembly.And can the throttling valve 18 in cushion chamber be adjusted according to the difference of testing requirements, guarantee security and the accuracy of whole safe automobile air bag development rate and acceleration test snubber assembly.
Referring to Fig. 5, the control section of safe automobile air bag development rate of the present invention and acceleration test snubber assembly is mainly comprised of high-speed camera, industrial computer, multi-channel synchronous data acquisition card, signal condition module, rotary encoder (angular-rate sensor) 3, acceleration transducer 8 and application software.
Described safe automobile air bag development rate and the control section of acceleration test snubber assembly adopt multi-channel synchronous data acquisition card as the core of data acquisition process part.Start test, start safe automobile air bag, when launching, safe automobile air bag promotes 15 upsets of buffering cover plate, rotary encoder (angular-rate sensor) 3 and acceleration transducer 8 in safe automobile air bag development rate and acceleration test snubber assembly are started working, the simulating signal that rotary encoder (angular-rate sensor) 3 and acceleration transducer 8 produce is sent in signal condition module, signal condition module settling signal amplifies, filtering etc., and the signal of collection is converted to the standard signal that multi-channel synchronous data acquisition card can identify and is sent in multi-channel synchronous data acquisition card.Multi-channel synchronous data acquisition card converts a plurality of standard signals to digital quantity simultaneously and is delivered to and in industrial computer, carries out analyzing and processing, and save data and generate laboratory report automatically.
Described safe automobile air bag development rate and acceleration test snubber assembly can with high-speed camera equipment connection, while starting to test, picture pick-up device completes the static image acquisition of launching whole process of safe automobile air bag, and is sent to and in industrial computer, carries out image processing and analyzing.
Claims (4)
1. a safe automobile air bag development rate and acceleration test snubber assembly, comprise mechanical part and control section, it is characterized in that, described mechanical part comprises 2 bottom location-plates (1) that structure is identical, cushion chamber left plate (2), rotary encoder (3), cushion chamber cover plate (4), strengthen location-plate (5), cushion chamber right plate (6), rotating shaft (7), acceleration transducer (8), location-plate (10), sensor support post (11), shaft coupling (12), cushion chamber left-hand axis bearing (13), cushion chamber right-hand axis bearing (14), buffering cover plate (15), locating piece (16), cushion chamber header board (17) and throttling valve (18), described control section comprises high-speed camera, industrial computer, multi-channel synchronous data acquisition card, signal condition module, rotary encoder (3) and acceleration transducer (8),
The cushion chamber left plate (2) being parallel to each other is connected with the medial surface screw of cushion chamber cover plate (4) with a narrow end surface of cushion chamber right plate (6), cushion chamber header board (17) is connected with another narrow end surface screw of cushion chamber right plate (6) with the cushion chamber left plate (2) being parallel to each other, the medial surface top rail of cushion chamber cover plate (4) is equipped with strengthens location-plate (5), buffering cover plate (15) adopts screw to be fixedly connected with rotating shaft (7) with pin, rotating shaft (7) is by being arranged on the cushion chamber left-hand axis bearing (13) on cushion chamber left plate (2) and cushion chamber right plate (6), cushion chamber right-hand axis bearing (14) and 2 identical rolling bearings of structure are arranged on the top of cushion chamber header board (17), the left end of rotating shaft (7) is provided with shaft coupling (12), the position that is positioned at buffering cover plate (15) below of cushion chamber header board (17) upper end is provided with locating piece (16), the left side of cushion chamber left plate (2) adopts bolt that the bottom location-plate (1) that structure is identical is installed with the bottom on the right side of cushion chamber right plate (6), the employing sensor support post (11) that rotary encoder (3) is arranged on rotating shaft (7) left side is arranged on the location-plate (10) on cushion chamber left plate (2), the input end of rotary encoder (3) is connected with the shaft coupling (12) of rotating shaft (7) left end, the upper acceleration transducer (8) of installing of buffering cover plate (15), throttling valve (18) is arranged on cushion chamber header board (17).
2. according to safe automobile air bag development rate claimed in claim 1 and acceleration test snubber assembly, it is characterized in that, described cushion chamber left plate (2) is the plate structure part that structure is identical with cushion chamber right plate (6), and cushion chamber left-hand axis bearing (13) is the disc-like structural member that structure is identical with cushion chamber right-hand axis bearing (14).
3. according to safe automobile air bag development rate claimed in claim 1 and acceleration test snubber assembly, it is characterized in that, described rotating shaft (7) is a multidiameter class formation part, the shaft coupling axle that rotating shaft (7) left end is arranged to and shaft coupling (12) is equipped, rotating shaft (7) right-hand member is arranged to tetragonal body or hexahedron, tetragonal body or hexahedron and shaft coupling axle inboard are respectively arranged with and 2 equipped bearing shaft of bearing that structure is identical, the diameter of tetragonal body or hexahedron is less than the diameter of bearing shaft and is greater than the diameter of shaft coupling axle, between two sections of bearing shaft, for installation, cushion the buffering plate shaft of cover plate (15), the diameter of buffering plate shaft is greater than the diameter of bearing shaft, the buffering plate shaft bearing shaft adjacent with its two ends forms respectively the shaft shoulder playing the role of positioning, on buffering plate shaft, be provided with vertically from left to right the groove of U font, buffering plate shaft is evenly equipped with vertical countersunk head tapped through hole and the tapered dowel through hole of two elongated slot walls with the groove of U font from top to bottom.
4. according to safe automobile air bag development rate claimed in claim 1 and acceleration test snubber assembly, it is characterized in that, described buffering cover plate (15) adopts screw to be fixedly connected with and to refer to rotating shaft (7) with pin: insert in the groove of the U font in rotating shaft (7) buffering cover plate (15) one end, employing pin is located by connecting, and adopts screw to be fixedly connected with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210281338.XA CN102768119B (en) | 2012-08-08 | 2012-08-08 | Automobile safety air bag unfolding speed and acceleration test buffering device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210281338.XA CN102768119B (en) | 2012-08-08 | 2012-08-08 | Automobile safety air bag unfolding speed and acceleration test buffering device |
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| Publication Number | Publication Date |
|---|---|
| CN102768119A CN102768119A (en) | 2012-11-07 |
| CN102768119B true CN102768119B (en) | 2014-09-03 |
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ID=47095600
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| CN201210281338.XA Expired - Fee Related CN102768119B (en) | 2012-08-08 | 2012-08-08 | Automobile safety air bag unfolding speed and acceleration test buffering device |
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| US10094737B2 (en) * | 2016-02-19 | 2018-10-09 | Ford Global Technologies, Llc | Airbag testing apparatus having an anthropomorphic test device |
| CN105588723B (en) * | 2016-03-07 | 2018-01-05 | 郭燕 | It is a kind of to be used to measure the device and method that automobile air-bag system ignites the period |
| CN110426216B (en) * | 2019-08-01 | 2022-04-12 | 湖北航天化学技术研究所 | Test system for airbag deployment |
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