CN112146863A - Device and method for measuring real-time pressure in air bag after side air curtain is ignited - Google Patents
Device and method for measuring real-time pressure in air bag after side air curtain is ignited Download PDFInfo
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- CN112146863A CN112146863A CN202011023554.5A CN202011023554A CN112146863A CN 112146863 A CN112146863 A CN 112146863A CN 202011023554 A CN202011023554 A CN 202011023554A CN 112146863 A CN112146863 A CN 112146863A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/08—Means for indicating or recording, e.g. for remote indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0052—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to impact
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
Abstract
The invention discloses a device and a method for measuring real-time pressure in an air bag after a side air curtain is ignited, wherein the device comprises a base, a pressing plate, an air pipe and an air pressure sensor; the base is including the installation department and the fastening portion that connect gradually, the installation department is used for being connected with gas generator, fastening portion will the inner wall of clamp plate compresses tightly the laminating on the outer wall of air pocket, form between the inner wall of clamp plate and the outer wall of air pocket and be used for holding tracheal accommodation space, tracheal head end is used for stretching into in the air pocket, tracheal tail end with gas pressure sensor connects. The device and the method for measuring the real-time pressure in the air bag after the side air curtain is ignited have the advantages of simple structure, less material consumption during measurement, low cost, simple, convenient and quick operation during test, and accurate real-time pressure data in the measured air bag.
Description
Technical Field
The invention relates to the technical field of side air curtain detonation tests, in particular to a device and a method for measuring real-time pressure in an air bag after side air curtain detonation.
Background
When the vehicle rolls and is collided by the side face, the side air curtain can effectively reduce the injury to people, and after the side air curtain is exploded, the longer the pressure maintaining time (working pressure) of the popped air bag is, the better the safety performance is. In the trial-manufacturing stage of the side air curtain, a sample needs to be detected, the side air curtain needs to be sampled and detected during mass production, the air curtain pressure maintaining performance needs to be tested during an automobile collision test, and the pressure data in the air bag of the side air curtain needs to be acquired after the side air curtain is exploded, so that a device and a method capable of accurately measuring the real-time pressure in the air bag are needed.
Disclosure of Invention
In view of this, the present invention is directed to overcome the defects in the prior art, and provides a device and a method for measuring real-time pressure in an air bag after a side air curtain is ignited.
The invention discloses a device for measuring real-time pressure in an air bag after a side air curtain is ignited, which comprises a base, a pressing plate, an air pipe and a gas pressure sensor, wherein the base is provided with a plurality of air holes; the base is including the installation department and the fastening portion that connect gradually, the installation department is used for being connected with gas generator, fastening portion will the inner wall of clamp plate compresses tightly the laminating on the outer wall of air pocket, form between the inner wall of clamp plate and the outer wall of air pocket and be used for holding tracheal accommodation space, tracheal head end is used for stretching into in the air pocket, tracheal tail end with gas pressure sensor connects.
Further, the fastening portion still includes fastening bolt, be provided with the screw hole on the fastening portion, fastening bolt passes the screw hole and support and lean on the outer wall of clamp plate will the inner wall of clamp plate compresses tightly the laminating on the outer wall of air pocket.
Further, the installation department is the ring structure, the middle part of ring structure is provided with can overlap the mounting hole of establishing on gas generator.
Furthermore, an avoiding notch is formed in one side, facing the side air curtain, of the circular ring structure.
Further, the inner wall of the fastening part, the outer wall of the pressing plate and the inner wall of the pressing plate are all arc surfaces; the edges and corners of the pressing plate facing to one side of the air bag are rounded.
Further, the inner wall of the pressing plate is provided with a mounting groove for forming the accommodating space, and the mounting groove is recessed along the direction far away from the air bag.
Further, the mounting groove is a semi-cylindrical groove, and the overall shape of the mounting groove is one of a straight shape, an L shape and a T shape.
Furthermore, the air pipe adopts a high-pressure soft air pipe.
The invention also provides a method for measuring the real-time pressure in the gas bag after the side gas curtain is ignited, the device for measuring the real-time pressure in the gas bag after the side gas curtain is ignited is adopted, and the method comprises the following steps:
step one, forming a through hole on the air bag close to one side of the outlet end of the automobile generator, wherein the through hole enables the interior of the air bag to be communicated with the exterior of the air bag;
step two, the head end of the air pipe extends into the air bag through the through hole, and glue is coated between the through hole and the air pipe for sealing;
step three, connecting the tail end of the air pipe with the gas pressure sensor;
fourthly, attaching the inner wall of the pressing plate to the outer wall of the air bag, enabling the air pipe to correspond to the mounting groove in position, and enabling the middle of the pressing plate to cover the through hole;
connecting the mounting part with a gas generator, enabling the inner wall of the fastening part to face the outer wall of the pressing plate, screwing the fastening bolt, enabling the fastening bolt to penetrate through the threaded hole and abut against the outer wall of the pressing plate, and pressing and attaching the inner wall of the pressing plate to the outer wall of the gas bag;
and step six, igniting the side gas curtain, wherein the real-time data acquired by the gas pressure sensor is the real-time pressure in the gas bag.
The invention has the beneficial effects that: the invention discloses a device for measuring the real-time pressure in an air bag after a side air curtain is ignited, wherein a gas pressure sensor is communicated with the interior of the air bag through a gas pipe, the pressure in the air bag is measured in real time, the shape and the relative position of the gas pipe, a gas generator and the air bag near a through hole are prevented from changing through a pressing plate and a base, the tearing near the through hole of the air bag can be prevented, the gas pipe can be prevented from being separated from the air bag, the pressure data measured by the gas pressure sensor is accurate, the device has a simple structure, the consumed materials in measurement are few, and the cost is low; the method for measuring the real-time pressure in the air bag after the side air curtain is ignited is simple, convenient and quick to operate during testing, and the measured real-time pressure data in the air bag is accurate.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is an exploded view of FIG. 2;
FIG. 4 is a schematic structural diagram of a base according to the present invention;
FIG. 5 is a schematic view of the construction of the platen of the present invention;
FIG. 6 is a plot of real-time pressure inside the airbag after a side curtain has been ignited, plotted against data collected in accordance with the present invention.
Description of the main reference numerals: 10-base, 11-mounting part, 111-mounting hole, 112-avoiding notch, 12-fastening part, 121-threaded hole, 122-fastening bolt, 20-pressing plate, 21-mounting groove, 30-air pipe, 40-air pressure sensor, 50-air generator, 60-side air curtain, 61-air bag and 611-through hole.
Detailed Description
As shown in fig. 1 to 5, the device for measuring the real-time pressure in the air bag after the side air curtain is ignited in the present embodiment comprises a base 10, a pressure plate 20, an air pipe 30 and a gas pressure sensor 40; base 10 is including the installation department 11 and the fastening part 12 that connect gradually, installation department 11 is used for being connected with gas generator 50, fastening part 12 will the inner wall of clamp plate 20 compresses tightly the laminating on the outer wall of air pocket 61, it is used for holding to form between the inner wall of clamp plate 20 and the outer wall of air pocket 61 trachea 30 accommodation space, trachea 30's head end is used for stretching into in the air pocket 61, trachea 30's tail end with gas pressure sensor 40 connects. After the side gas curtain 60 is exploded, the pressure inside the gas bag 61 changes, the gas pipe 30 can enable the gas pressure sensor 40 to be communicated with the inside of the gas bag 61, therefore, the pressure data measured by the gas pressure sensor 40 is the pressure data inside the gas bag 61, the gas pressure sensor 40 adopts the existing finished product which can be directly purchased in the market, and the specific structure and the working principle of the gas pressure sensor 40 are not described in detail herein. Because the air tube 30 needs to be perforated on the air bag 61 after extending into the air bag 61, the perforated hole 611 is easy to tear after the side air curtain 60 is exploded, which causes the measured pressure data to have larger deviation with the actual real pressure data, therefore, the present invention is provided with a pressing plate 20 and a base 10, a mounting portion 11 of the base 10 is connected with a gas generator 50, a fastening portion 12 of the base 10 presses the inner wall of the pressing plate 20 against the outer wall of the gas bag 61, a gas pipe 30 is placed in a receiving space between the inner wall of the pressing plate 20 and the outer wall of the gas bag 61, therefore, the base 10 and the pressure plate 20 can prevent the gas pipe 30, the gas generator 50, and the air bag 61 near the through hole 611 from being changed in shape and relative position, can prevent the air pipe 30 from being torn near the through hole 611 of the air bag 61, and can prevent the gas pipe 30 from being separated from the air bag 61, thereby making the pressure data measured by the gas pressure sensor 40 accurate.
In this embodiment, the fastening portion 12 further includes a fastening bolt 122, a threaded hole 121 is formed in the fastening portion 12, and the fastening bolt 122 passes through the threaded hole 121 and abuts against the outer wall of the pressing plate 20 to press and attach the inner wall of the pressing plate 20 to the outer wall of the air bag 61; the installation part 11 is a circular ring structure, and the middle part of the circular ring structure is provided with an installation hole 111 which can be sleeved on the gas generator 50. The mounting portion 11 is fitted over the gas generator 50, and can prevent the entire base 10 from moving in the radial direction of the mounting hole 111, the axial direction of the threaded hole 121 is perpendicular to the axial direction of the mounting hole 111, and after the fastening bolt 122 is screwed, and the fastening bolt 122 is passed through the threaded hole 121 and abutted against the outer wall of the pressure plate 20, the inner wall of the pressure plate 20 can be pressed against the outer wall of the gas bag 61. The fastening bolt 122 can be disassembled, so that only one air pipe 30 is consumed in each test, and the base 10, the pressure plate 20 and the air pressure sensor 40 can be reused, so that the cost is low.
In this embodiment, the annular structure is provided with an avoidance gap 112 towards the side of the side air curtain 60. The avoiding gap 112 can prevent the mounting seat from interfering with the side curtain 60 when the mounting portion 11 is sleeved on the gas generator 50, and in this embodiment, the avoiding gap 112 is formed by a section plane intersecting with the circular ring structure, and the section plane is tangent to the mounting hole 111.
In this embodiment, the inner wall of the fastening portion 12, the outer wall of the pressing plate 20, and the inner wall of the pressing plate 20 are all arc surfaces. The outer wall of the air bag 61 close to the outlet end of the gas generator 50 is partially an arc surface, and the inner part of the pressing plate 20 is the arc surface, so that the pressing plate can be better tightly attached to the outer wall of the air bag 61, and the contact area is increased; the inner wall of the fastening part 12 faces the outer wall of the pressing plate 20, both are arc surfaces, and the diameter of the inner wall of the fastening part 12 is larger than that of the outer wall of the pressing plate 20, so that the inner wall of the fastening part 12 does not interfere with the inner wall of the pressing plate 20, and meanwhile, when the fastening stud 122 fails, the inner wall of the fastening part 12 also has a limiting function on the pressing plate 20, although the limiting function is not as good as that of the fastening stud 122, the inner wall also has the functions of preventing the vicinity of the through hole 611 of the airbag 61 from being torn and preventing the air pipe 30 from being separated from the airbag 61, thereby preventing the pressure data measured by the gas pressure sensor 40 from generating large errors when the fastening stud. The mounting portion 11 of the base 10 is fitted over the gas generator 50, so that a portion of the pressure plate 20 is pressed against the joint between the gas bag 61 and the gas generator 50, and the corners of the pressure plate 20 facing the gas bag 61 are rounded, thereby preventing the pressure plate 20 from crushing the gas bag 61 between the gas generator 50 and the pressure plate 20 when the fastening studs 122 are tightened to press the pressure plate 20.
In this embodiment, the inner wall of the pressing plate 20 is provided with an installation groove 21 for forming the accommodating space, the installation groove 21 is recessed along a direction away from the air bag 61, during the test, the air tube 30 is located in the installation groove 21, and the air tube 30 is not easily squeezed and deformed after the side air curtain 60 is ignited.
In this embodiment, the mounting groove 21 is a semi-cylindrical groove, the middle portion of the pressure plate 20 covers the connection portion between the air tube 30 and the air bag 61, the tail end of the air tube 30 extends out of the pressure plate 20 through the mounting groove 21 and is connected with the gas pressure sensor 40, the mounting groove 21 has one of a "one-line" shape, an "L" shape or a "T" shape, on one hand, the extending direction of the tail end of the air tube 30 can have multiple choices, the spatial layout of different test scenes is different, the extending direction of the air tube has multiple choices, which can increase the adaptability of the invention to different test scenes, on the other hand, in order to make the measured pressure data more accurate, two or three through holes 611 can be simultaneously formed in the test, and then the corresponding number of air pipes 30 and the corresponding number of gas pressure sensors 40 are matched, so that multiple groups of data are simultaneously measured in one test, and the accuracy of the measurement result is ensured.
In this embodiment, the air tube 30 is a high-pressure air tube, the head end of the air tube 30 extends into the air bag 61, after the side air curtain 60 is ignited, the pressure inside the air bag 61 of the side air curtain 60 is increased, the air tube 30 may deform, and the pressure data measured by the gas pressure sensor 40 is inaccurate, and the high-pressure air tube can prevent the air tube 30 from deforming.
In this embodiment, a method for measuring a real-time pressure in an air bag after a side air curtain is ignited adopts the above-mentioned device for measuring a real-time pressure in an air bag after the side air curtain is ignited, and includes the following steps:
step one, a through hole 611 is formed in the air bag 61 close to one side of the outlet end of the automobile generator, and the through hole 611 enables the interior of the air bag 61 to be communicated with the exterior of the air bag 61; in the present embodiment, the number of the through holes 611, the air tubes 30, and the gas pressure sensors 40 is one;
step two, the head end of the air pipe 30 extends into the air bag 61 through the through hole 611, and glue is applied between the through hole 611 and the air pipe 30 for sealing; in order to make the test faster, the glue can be quick-drying glue;
step three, connecting the tail end of the air pipe 30 with the gas pressure sensor 40;
step four, attaching the inner wall of the pressing plate 20 to the outer wall of the air bag 61, corresponding the positions of the air pipe 30 and the installation groove 21, and simultaneously covering the middle part of the pressing plate 20 on the through hole 611;
connecting the mounting part 11 with the gas generator 50, facing the inner wall of the fastening part 12 to the outer wall of the pressing plate 20, screwing the fastening bolt 122, wherein the fastening bolt 122 passes through the threaded hole 121 and abuts against the outer wall of the pressing plate 20, and pressing and attaching the inner wall of the pressing plate 20 to the outer wall of the gas bag 61;
and step six, igniting the side air curtain 60, wherein the real-time data acquired by the gas pressure sensor 40 is the real-time pressure in the air bag 61, in order to enable the measured data to be more visual, a real-time pressure curve in the air bag 61 after the side air curtain 60 is ignited is drawn by taking time as an abscissa and the measured real-time pressure as an ordinate, and whether the pressure size and the pressure maintaining capacity of the side air curtain 60 in the test meet the requirements or not can be visually seen from the curve in the graph, as shown in fig. 6.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (9)
1. The utility model provides a device for measuring real-time pressure in gas bag after side gas curtain point explodes which characterized in that: comprises a base (10), a pressure plate (20), an air pipe (30) and a gas pressure sensor (40); base (10) are including installation department (11) and fastening (12) that connect gradually, installation department (11) are used for being connected with gas generator (50), fastening (12) will the inner wall of clamp plate (20) compresses tightly the laminating on the outer wall of air pocket (61), form between the inner wall of clamp plate (20) and the outer wall of air pocket (61) and be used for holding the accommodation space of trachea (30), the head end of trachea (30) is used for stretching into in air pocket (61), the tail end of trachea (30) with gas pressure sensor (40) are connected.
2. The apparatus of claim 1 for measuring real-time pressure within the gas bag after a side curtain ignition burst, wherein: the fastening portion (12) further comprises a fastening bolt (122), a threaded hole (121) is formed in the fastening portion (12), the fastening bolt (122) penetrates through the threaded hole (121) and abuts against the outer wall of the pressing plate (20), and the inner wall of the pressing plate (20) is pressed and attached to the outer wall of the air bag (61).
3. The apparatus of claim 2, wherein the apparatus is configured to measure the real-time pressure within the gas bag after the side curtain has been ignited: installation department (11) are the ring structure, the middle part of ring structure is provided with mounting hole (111) that can overlap and establish on gas generator (50).
4. The apparatus of claim 3 for measuring the real-time pressure within the gas bag after the side curtain has been fired, wherein: an avoiding notch (112) is formed in one side, facing the side air curtain (60), of the circular ring structure.
5. The apparatus of claim 2, wherein the apparatus is configured to measure the real-time pressure within the gas bag after the side curtain has been ignited: the inner wall of the fastening part (12), the outer wall of the pressure plate (20) and the inner wall of the pressure plate (20) are all arc surfaces; the edges and corners of the pressure plate (20) facing the air bag (61) are rounded.
6. The apparatus of claim 2, wherein the apparatus is configured to measure the real-time pressure within the gas bag after the side curtain has been ignited: the inner wall of the pressing plate (20) is provided with a mounting groove (21) used for forming the accommodating space, and the mounting groove (21) is recessed along the direction far away from the air bag (61).
7. The apparatus of claim 6, wherein the pressure in the gas bag is measured in real time after the side curtain is ignited: the mounting groove (21) is a semi-cylindrical groove, and the overall shape of the mounting groove (21) is one of a straight shape, an L shape and a T shape.
8. The apparatus of claim 2, wherein the apparatus is configured to measure the real-time pressure within the gas bag after the side curtain has been ignited: the air pipe (30) adopts a high-pressure soft air pipe.
9. A method for measuring the real-time pressure in a gas bag after the ignition of a side gas curtain, which is characterized in that the device for measuring the real-time pressure in the gas bag after the ignition of the side gas curtain as claimed in any one of claims 2 to 8 is adopted, comprising the following steps:
step one, a through hole (611) is formed in an air bag (61) close to one side of an outlet end of an automobile generator, and the through hole (611) enables the interior of the air bag (61) to be communicated with the exterior of the air bag (61);
step two, the head end of the air pipe (30) extends into the air bag (61) through the through hole (611), and glue is smeared between the through hole (611) and the air pipe (30) for sealing;
step three, connecting the tail end of the air pipe (30) with the gas pressure sensor (40);
fourthly, attaching the inner wall of the pressing plate (20) to the outer wall of an air bag (61), enabling the air pipe (30) to correspond to the position of the mounting groove (21), and enabling the middle part of the pressing plate (20) to cover the through hole (611);
connecting the mounting part (11) with the gas generator (50), enabling the inner wall of the fastening part (12) to face the outer wall of the pressing plate (20), screwing the fastening bolt (122), enabling the fastening bolt (122) to penetrate through the threaded hole (121) and abut against the outer wall of the pressing plate (20), and pressing the inner wall of the pressing plate (20) to be attached to the outer wall of the gas bag (61);
and sixthly, igniting the side air curtain (60), wherein the real-time data acquired by the gas pressure sensor (40) is the real-time pressure in the air bag (61).
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| CN202011023554.5A CN112146863B (en) | 2020-09-25 | 2020-09-25 | Device and method for measuring real-time pressure in air bag after side air curtain is ignited |
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| CN202011023554.5A CN112146863B (en) | 2020-09-25 | 2020-09-25 | Device and method for measuring real-time pressure in air bag after side air curtain is ignited |
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