CN213544021U - Dummy is markd with system calibrating device that tests speed and is included its system that tests speed - Google Patents

Abstract

The utility model relates to the technical field of automobile safety detection, and discloses a speed measuring system calibration device for dummy calibration and a speed measuring system comprising the same, wherein the calibration device comprises a longitudinal beam, a grid clamp, a suspension device and two beams which are arranged at relative intervals, two ends of the longitudinal beam are respectively connected with a beam, and the longitudinal beam and the two beams form an I-shaped framework; the grid clamp is used for clamping a grid, the grid clamp is installed on the longitudinal beam, and the grid clamp can rotate and/or slide relative to the longitudinal beam; the suspension device is arranged on the cross beam and is used for being connected with a suspension rope for dummy calibration. The utility model can calibrate each speed measuring system at the same position, and is suitable for calibrating speed measuring systems for various dummy and different position calibration; the heavy dummy or other heavy obstacles with high price do not need to be placed, the pendulum bob does not need to be frequently replaced, the calibration instrument does not need to be moved, and the operation is simple.

Description

Dummy is markd with system calibrating device that tests speed and is included its system that tests speed

Technical Field

The utility model relates to an automobile safety inspection technical field especially relates to a dummy is markd with system calibrating device that tests speed and is reached including its system that tests speed.

Background

The automobile collision test is the most effective method for verifying the safety of automobile collision. The dummy for the automobile crash test can be used for evaluating the damage value of the passenger during the crash. Before the collision test, in order to ensure that the dummy has higher biological simulation degree, the dummy needs to be calibrated, tested and adjusted according to rules or standards.

Dummy calibration is a method of evaluating the condition of a dummy from measured responses by applying a specific load to the dummy or dummy component. During calibration, the dummy is impacted at different speeds using various pendulums to obtain the response of the dummy under such loading conditions. Therefore, the pendulum bob speed directly determines the response of the dummy, and the precision and the stability of the pendulum bob speed measurement system are important preconditions for ensuring the calibration accuracy of the dummy and the accuracy of the whole vehicle collision test result.

The speed measuring system for calibrating the dummy mainly comprises a grating, a laser transmitting and receiving module, a timing module and calibration software. The speed measurement principle is that a row of grids with fixed size passes through a laser beam, and the speed is calculated by the size of the grids and the time taken for passing through the laser beam. Therefore, the main factors influencing the speed measuring system for calibrating the dummy include: 1) grid size; 2) the laser transmitting, receiving and timing module; 3) and (5) calibrating software.

In order to ensure the accuracy and stability of the speed measuring system for calibrating the dummy, the speed measuring system is usually calibrated once every half year. Although there are a plurality of factors affecting the accuracy of the velocity measurement system, the velocity measurement system as a whole can be calibrated during calibration, and the geometric dimension of the grating and the timing module and the like are not calibrated independently. The calibration method comprises the following steps: the existing speed measuring system and another set of calibrated speed measuring system (provided by a third-party calibrating mechanism) are used for measuring the speed of the pendulum bob released from a certain height at the same time, and the speed measuring system for calibrating the dummy is calibrated by comparing the results measured by the two speed measuring systems. In order to ensure the stability of the speed measuring system, a plurality of speed points need to be measured during calibration, and the measured speed needs to cover all the speeds for calibration.

At present, the pendulum bob is usually pulled up and released directly during calibration, so that the pendulum bob obtains the speed required by calibration. And erecting a speed measuring instrument provided by a third-party calibration mechanism to calibrate the speed measuring system for calibrating the dummy. The maximum impact speed of the pendulum is about 7m/s, the maximum pendulum mass is 23.4kg, and the kinetic energy of the pendulum is very large. In order to prevent the pendulum bob from continuously swinging after passing through the velocimeter, a heavy and expensive dummy (the mass of a single dummy is about 85kg, the price is 100-800 thousands and the like) or an object with similar mass and an energy absorption effect needs to be placed. Or the buffer pad is reformed and thickened, and the flexible protective pad or the protective net arranged for preventing falling after being impacted by the pendulum bob is not enough to block the direct impact of the pendulum bob during normal calibration.

Therefore, the calibration device of the speed measurement system for calibrating the existing dummy mainly has the following defects:

1. the potential cost is high: during calibration, a plurality of speed values need to be measured, the same speed value needs to be measured for a plurality of times, the maximum speed needs to exceed the normal calibration speed, and an expensive dummy is used for directly blocking the pendulum motion, so that unnecessary loss of the dummy is increased, and even the dummy can be directly damaged;

2. the remanufacturing cost is high: if the pendulum bob is prevented from further moving by adding a protective pad when the speed measuring system for calibration is calibrated, the existing calibration equipment needs to be greatly modified, including reinforcing a supporting structure, thickening a cushion pad and the like, so that the modification cost is high, and a laboratory needs to meet the modification requirement in space;

3. poor operability: 1) the reformed large protection pad may affect the normal calibration of the dummy, so after the speed measurement system is calibrated, the protection pad needs to be dismantled, and a field needs to be searched for and stored, so that the operability is poor; 2) if the pendulum bob falls down from the position with the height of 3 meters to do simple pendulum movement until the pendulum bob stops, longer waiting time is needed, and the feasibility is low; moreover, the pendulum bob has large kinetic energy, so that the pendulum bob can freely stop or be directly blocked by a cushion and the like, a great risk exists when a speed measuring system is calibrated, equipment is easily damaged, and even the personal safety of operators is threatened. 3) There are a large variety of pendulums, each having a fixed grid of a particular size. Some pendulum bob and velocity measurement hardware are one-to-one corresponding, but some velocity measurement hardware equipment of pendulum bob is shared, and these heavy pendulum bob need to be replaced during calibration, so that the operation is very inconvenient; 4) direct calibration requires frequent movement of the calibration device to the vicinity of the support from which the pendulum is suspended, and is also often prone to problems with failure to erect the calibration equipment due to pendulum grille mounting angles and site issues.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the utility model aims at providing a dummy is markd with system calibrating device that tests speed and is included its system that tests speed to solve the potential cost height that current calibrating device exists, reform transform with big and the poor problem of maneuverability.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

dummy is markd with system calibrating device that tests speed, include: the device comprises a longitudinal beam, a grating clamp, a suspension device and two cross beams which are oppositely arranged at intervals, wherein two ends of the longitudinal beam are respectively connected with one cross beam, and the longitudinal beam and the two cross beams form an I-shaped framework; the grid clamp is used for clamping a grid, the grid clamp is installed on the longitudinal beam, and the grid clamp can rotate and/or slide relative to the longitudinal beam; the suspension device is arranged on the cross beam and is used for being connected with a suspension rope for dummy calibration.

Preferably, the energy absorption device further comprises an energy absorption block, wherein the energy absorption block is arranged on one cross beam and is positioned on the side opposite to the longitudinal beam.

Preferably, the lifting sling also comprises a lifting sling which is arranged on the other cross beam.

Preferably, scales are arranged on the surface of the longitudinal beam and the end face, perpendicular to the axis of the longitudinal beam, of the grating clamp.

Preferably, the suspension device comprises four sets of fixed pulleys, and one set of fixed pulleys is respectively mounted at the end part of each beam.

Preferably, the cross-beam is telescopic along its length.

Preferably, the grid anchor clamps include the body and with body fixed connection's first splint and second splint, the body cover is located on the longeron, have the clearance between first splint and the second splint.

Preferably, the cross beam is a cuboid, and the longitudinal beam is a cylinder; the cross beam is perpendicular to the longitudinal beam.

Preferably, the central axes of the longitudinal beams and the central axes of the two cross beams are located in the same plane.

Dummy is markd with system that tests speed, include: the calibration device comprises a calibration device of the speed measuring system for calibrating the dummy, a grating, a laser transmitting and receiving module, a timing module and a controller, wherein a grating clamp of the calibration device clamps the grating, and the laser transmitting and receiving module and the timing module are electrically connected with the controller.

The embodiment of the utility model provides a dummy is markd with system calibrating device that tests speed and is compared with prior art including its system that tests speed, its beneficial effect lies in:

the calibration device for the speed measuring system for calibrating the dummy of the embodiment of the utility model clamps the grids through the arranged grid clamps, and can clamp various grids in the grid clamps because the thicknesses of various grids are basically the same, so that the calibration device of the utility model can be suitable for various grids and can calibrate each speed measuring system at the same position; moreover, because the speed of the pendulum bob when the pendulum bob is swung to the lowest point from a high place is irrelevant to the quality, no matter the grating is fixed on the pendulum bob for calibration with large quality or fixed in the grating clamp of the utility model, the grating is released after being lifted to the same height, the speed measured at the lowest point is equal, therefore, the calibration device of the utility model can be applicable to the calibration of speed measuring systems for calibration of various dummy people and different parts by clamping different gratings for calibration in the grating clamp;

the utility model has the advantages that the mass of the device is small, the kinetic energy during calibration is small, the device can directly impact a protective cushion which is not required to be modified or an object which is placed at will and has a certain mass during calibration, the kinetic energy of the falling pendulum can be dissipated, the danger is greatly reduced during calibration, and no harm is caused to operators and equipment; moreover, a heavy dummy or other heavy obstacles with high price do not need to be placed, a pendulum bob, a mobile calibration instrument and the like do not need to be frequently replaced, the operation is simple, and the labor cost is effectively reduced;

the calibration device of the utility model is adopted to calibrate the speed measurement system, which can avoid the problem that calibration equipment can not be erected for calibration due to the limitation of the field, and the utility model can directly match the equipment for dummy calibration and the field, and is suitable for all dummy calibration laboratories;

the device of the utility model is simple in structure, low in manufacturing cost, convenient to popularize and use to easy operation, functional stability are strong.

Drawings

Fig. 1 is a schematic three-dimensional structure diagram of a calibration device of a speed measuring system for calibrating a dummy according to an embodiment of the present invention;

fig. 2 is a schematic front view of a calibration device of a speed measuring system for calibrating a dummy according to an embodiment of the present invention;

fig. 3 is a schematic top view of a calibration device of a speed measuring system for calibrating a dummy according to an embodiment of the present invention;

fig. 4 is a schematic side view of a calibration device of a speed measuring system for calibrating a dummy according to an embodiment of the present invention;

fig. 5 is a schematic view of a three-dimensional structure of a calibration device of a speed measuring system for calibrating a dummy according to an embodiment of the present invention after a grid is installed;

fig. 6 is a schematic front view of the calibration device for a speed measuring system for dummy calibration according to the embodiment of the present invention after installing a grid;

fig. 7 is a schematic top view of the calibration device for a speed measuring system for calibrating a dummy according to an embodiment of the present invention after installing a grating;

fig. 8 is a schematic side view of the calibration device for a speed measuring system for calibrating a dummy according to the embodiment of the present invention after installing a grating;

in the figure, 1, an energy absorption block; 2. a fixed pulley; 3. a cross beam; 4. a grid clamp; 41. a through hole; 42. an end face; 43. a body; 44. a first splint; 45. a second splint; 5. a stringer; 6. lifting the hanging rope; 7. a grid.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1-4, the utility model discloses a dummy is markd with system calibrating device that tests speed, include: the artificial man dummy comprises a longitudinal beam 5, a grating clamp 4, a suspension device and two cross beams 3, wherein the two cross beams 3 are arranged in parallel at intervals, two ends of the longitudinal beam 5 are respectively connected to one cross beam 3, the longitudinal beam 5 and the two cross beams 3 form an I-shaped framework, and the size of the I-shaped framework is matched with that of a pendulum hanging rope for the existing dummy calibration; the grating clamp 4 is used for clamping a grating 7, the grating clamp 4 is installed on the longitudinal beam 5, and the grating clamp 4 can rotate and/or slide relative to the longitudinal beam 5 so as to adjust the installation position and the installation direction of the grating clamp and is suitable for fixing various types of gratings; the suspension device is arranged on the cross beam 3 and is used for being connected with a suspension rope for dummy calibration.

The utility model discloses a 4 centre gripping grids 7 of grid anchor clamps to, can adjust the installation orientation of grid 7 in a flexible way as required and front and back position, make its applicable installation in various pendulum grids, can carry out the calibration of each system that tests the speed in same position, be applicable to the calibration of the system that tests the speed of various dummy, different positions mark usefulness.

Preferably, the calibration device further comprises an energy absorption block 1, wherein the energy absorption block 1 is mounted on one of the cross beams 3 and is located on the side opposite to the longitudinal beam 5, the side is a collision end and is used for absorbing energy when the whole device falls, and as shown in fig. 1, the energy absorption block 1 and the longitudinal beam 5 are respectively located on two sides of the cross beam 3 at the collision end. The energy absorption block 1 is arranged to absorb energy, so that the pendulum bob can directly impact a protective pad which does not need to be modified or any placed object with certain mass during calibration, the kinetic energy of the falling pendulum bob can be dissipated, and a heavy and expensive dummy does not need to be placed.

Preferably, the calibration device further comprises a lifting sling 6, said lifting sling 6 being mounted on one of the cross-members 3, the one cross-member 3 being preferably located at the non-impact end for connection to a hook for lifting a calibration pendulum.

It should be noted that the installation position of the hoisting hanging rope 6 is preferably installed in the middle of the cross beam 3, and may also be installed in other positions of the cross beam 3; the number of the lifting hanging ropes 6 can be one, and also can be two or more than two, which are uniformly distributed on the cross beam 3.

In order to facilitate positioning of the installation position and the installation direction of the grating clamp, optionally, scales are provided on the surface of the longitudinal beam 5 and on the end surface 42 of the grating clamp 4 perpendicular to the longitudinal beam axis, wherein the installation position of the grating 7 in the longitudinal direction of the longitudinal beam 5 is adjusted by the scales on the surface of the longitudinal beam 5, and the installation direction of the grating 7 in the circumferential direction of the longitudinal beam 5 is adjusted by the scales on the end surface 42 of the grating clamp 4. Optionally, a limiting block may be further provided on the longitudinal beam 5 for limiting the moving position of the grid clamp 4, so that the grid clamp 4 moves within a certain range.

In an alternative embodiment, the grid clamp 4 is provided with through holes 41, preferably oval holes, and the grid clamp 4 is used for connecting the grid 7, preferably by screws, which pass through the through holes 41 and are fixed by nuts. The thickness of various grids is the same basically, though the length is different, but the utility model discloses a grid anchor clamps 4 adopts oval hole and screw nut to connect, presss from both sides tight fixedly with grid 7, consequently is applicable to the installation of various pendulum grids. Optionally, the grid clamp 4 includes a body 43, and a first clamping plate 44 and a second clamping plate 45 fixedly connected to the body 43, wherein the body 43 is sleeved on the longitudinal beam 5, and a gap is formed between the first clamping plate 44 and the second clamping plate 45. The middle of the body 43 is provided with a through hole for sleeving the grating clamp 4 on the longitudinal beam 5, and the first clamping plate 44 and the second clamping plate 45 are provided with through holes 41 for clamping the grating 7, and the grating 7 passes through the through holes 41 through screws and is fixed by nuts. Wherein, the mounting direction of the first clamping plate 44 and the second clamping plate 45 can be adjusted by 360 degrees. Preferably, the gap between the first clamping plate 44 and the second clamping plate 45 has elasticity so as to adjust the clampable thickness of the first clamping plate 44 and the second clamping plate 45.

As shown in fig. 1 to 4, the suspension device includes four sets of fixed pulleys 2, and the four sets of fixed pulleys 2 are respectively mounted on respective ends of a cross member 3. Namely, the end part of each cross beam 3 is provided with a group of fixed pulleys 2, and the fixed pulleys 2 are flexibly connected with a pendulum hanging rope to hang the whole calibrating device.

In order to match pendulum suspension ropes for different impact pendulum suspensions, the cross beam 3 is optionally telescopic along its length direction, so that the distance between the fixed pulleys 2 respectively located at both ends of the same cross beam 3 is adjustable. For example, the beam 3 may be composed of a plurality of sleeves, and the adjustment of the beam length is achieved by telescoping the sleeves.

In an alternative embodiment, the cross beam 3 is a rectangular parallelepiped, and the longitudinal beam 5 is a cylinder.

Further, the cross beam 3 and the longitudinal beam 5 are perpendicular to each other.

Preferably, the longitudinal beams 5 and the central axes of the two cross beams 3 are located in the same plane.

The utility model also provides a dummy is markd with system of testing speed, include: as shown in fig. 5-8, a grating clamp of the calibration device clamps the grating, and the laser transmitting and receiving module and the timing module are both electrically connected to the controller, wherein the laser transmitting and receiving module is used for emitting a laser beam, and the timing module is used for acquiring the time taken by the grating 7 to pass through the laser beam; the velocity is calculated using the size of the grid and the time it takes for the grid to pass through the laser beam.

It should be noted that, to mark with the system of testing the speed to different dummy, different positions, only need during the calibration install corresponding grid the utility model discloses an among the grid anchor clamps 4 to the cooperation is used corresponding laser emission receiving module and timing module, can calibrate, and it is very simple and convenient to operate, and need not frequently to remove the calibration instrument.

The utility model discloses a theory of operation does: according to the law of conservation of mechanical energy (mgh ═ 0.5 < m > v ^ 2), the speed of pendulum from high to lowest point is independent of mass. Therefore, no matter the grid is fixed on the pendulum for calibration that the quality is big, still fixes in the utility model discloses a grid anchor clamps 4, release after promoting it to the same height, the speed that records at the minimum all equals. Therefore, can use the utility model discloses a calibrating device calibrates the system that tests the speed.

Use calibrating device is for example in dummy's application of demarcating with the system that tests the speed, explains the utility model discloses a working process as follows:

use the utility model discloses a when calibrating device calibration dummy is markd with system of testing speed, at first, connect the pendulum that corresponds and hang rope and fixed pulley 2, hang whole calibrating device. Then, the grating 7 fixed on the pendulum bob to be tested is detached and installed in the grating clamp 4, and the installation direction and the front and back positions of the grating 7 are flexibly adjusted according to the requirement; after the grating 7 is installed, the laser transmitting and receiving module and the timing module (i.e. the hardware devices related to a set of speed measuring system that needs to be calibrated) that are used correspondingly to the grating 7 are respectively placed at the set positions. Will be used for the used another set of tachymeter frame of calibration to erect, will calibrating device uses to demarcate and draws high, release with pendulum hoisting device, and software is markd in the cooperation, can be in order to measure different speeds. And comparing the measured speed with the speed measured by a speed meter (provided by a third-party calibration mechanism) for calibration, and then completing the calibration of the speed measuring system.

To sum up, the embodiment of the utility model provides a dummy is markd with system calibrating device that tests speed, it is different from directly drawing high, release various pendulum, make the pendulum obtain corresponding speed, then carry out the method of system calibration that tests speed, but through the 4 centre gripping grids of grid anchor clamps that can be applicable to multiple grid for the grid of each pendulum all can assemble on this calibrating device, the laser emission receiving module that the cooperation pendulum corresponds the use, timing module and software, can carry out the calibration of each system that tests speed in same position. And, use the utility model discloses a calibrating device need not to place heavy obstacle when calibrating to each system that tests the speed, need not frequently to change pendulum, remove to mark with computer and calibration instrument etc..

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a dummy is markd with speed measurement system calibrating device which characterized in that includes:

a longitudinal beam, a grating clamp, a suspension device and two cross beams which are oppositely arranged at intervals,

the two ends of the longitudinal beam are respectively connected with a cross beam, and the longitudinal beam and the two cross beams form an I-shaped framework;

the grid clamp is used for clamping a grid, the grid clamp is installed on the longitudinal beam, and the grid clamp can rotate and/or slide relative to the longitudinal beam;

the suspension device is arranged on the cross beam and is used for being connected with a suspension rope for dummy calibration.

2. The calibration device for the speed measurement system for calibrating the dummy according to claim 1, further comprising an energy absorption block, wherein the energy absorption block is mounted on one of the cross beams and is located on the side opposite to the longitudinal beam.

3. The calibration device for the speed measurement system for calibrating the dummy according to claim 2, further comprising a lifting sling, wherein the lifting sling is mounted on the other cross beam.

4. The calibration device for the speed measurement system for calibrating the dummy according to claim 1, wherein scales are provided on the surface of the longitudinal beam and on the end surface of the grating clamp perpendicular to the axis of the longitudinal beam.

5. The calibration device for the speed measurement system for calibrating the dummy according to claim 1, wherein the suspension device comprises four sets of fixed pulleys, and one set of fixed pulleys is respectively mounted at the end of each beam.

6. The calibration device for the speed measurement system for calibrating the dummy according to claim 1, wherein the beam is retractable along the length direction thereof.

7. The calibration device for the speed measurement system for calibrating the dummy according to claim 1, wherein the grating clamp comprises a body, and a first clamping plate and a second clamping plate fixedly connected with the body, the body is sleeved on the longitudinal beam, and a gap is formed between the first clamping plate and the second clamping plate.

8. The calibration device for the speed measurement system for calibrating the dummy according to claim 1, wherein the cross beam is a cuboid, and the longitudinal beam is a cylinder; the cross beam is perpendicular to the longitudinal beam.

9. The calibration device for the speed measurement system for calibrating the dummy according to claim 1, wherein the central axes of the longitudinal beam and the two transverse beams are located in the same plane.

10. The utility model provides a dummy is markd and is used speed measurement system which characterized in that includes:

the calibration device of a speed measuring system for calibrating a dummy according to any one of claims 1 to 9, a grating, a laser transmitter-receiver module, a timing module and a controller, wherein the grating clamp of the calibration device clamps the grating, and the laser transmitter-receiver module and the timing module are both electrically connected to the controller.

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