CN219416523U - System for pressure test when automobile side air curtain point explodes - Google Patents
System for pressure test when automobile side air curtain point explodes Download PDFInfo
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- CN219416523U CN219416523U CN202320326814.9U CN202320326814U CN219416523U CN 219416523 U CN219416523 U CN 219416523U CN 202320326814 U CN202320326814 U CN 202320326814U CN 219416523 U CN219416523 U CN 219416523U
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- side curtain
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Abstract
The utility model relates to a system for testing pressure when an automobile side air curtain is in explosion. A system for pressure test when automobile side air curtain point explodes, includes film pressure sensor, resistance and data acquisition unit, film pressure sensor's sensing area is located between car roof and the interior plaque, film pressure sensor's a wiring stitch links to each other with the resistance, and another wiring stitch links to each other with data acquisition unit, the resistance with data acquisition unit links to each other. The utility model can accurately measure the partial pressure of the ceiling to the inner decorative plate in the side air curtain unfolding process.
Description
Technical Field
The utility model relates to the technical field of automobile part testing, in particular to a system for testing pressure during automobile side air curtain explosion.
Background
In the development process of the automobile, an automobile side air curtain subsystem explosion test needs to be developed. According to the test, the side air curtain assembly, the ceiling, the A-pillar interior trim part, the B-pillar interior trim part, the C-pillar interior trim part, the side ceiling lamp, the safety handrail and other sample parts are required to be installed on a white automobile body or a whole automobile according to the actual automobile state, the side air curtain ignition wire is led out to the outside of the automobile body, and the side air curtain is subjected to spot explosion through the spot explosion system so as to study the conditions of the side air curtain, such as unfolding gesture, splashing and the like. During the development stage, the side curtain may be unfolded to damage the inner decoration board and generate hard splash. Therefore, to further improve the analysis, it is desirable to measure the partial pressure of the ceiling against the interior trim panel as the side curtain is deployed. However, since the overlapping width of the ceiling and the interior trim part is small (usually less than 10 mm), and the side curtain unfolding process is complex, no relevant measuring scheme exists at present.
Disclosure of Invention
The utility model aims to provide a system for testing pressure when a side air curtain of an automobile is exploded, so as to accurately measure partial pressure of a ceiling to an interior trim panel in the process of expanding the side air curtain.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a system for pressure test when car side air curtain point explodes, includes film pressure sensor, resistance and data acquisition ware, when the test, film pressure sensor's sensing area is located between car roof and the interior plaque, film pressure sensor's one wiring stitch links to each other with the resistance, and another wiring stitch links to each other with data acquisition ware, the resistance with data acquisition ware connects in parallel.
According to the technical means, when the pressure test is carried out, the local pressure of the ceiling to the interior trim panel in the side air curtain unfolding process can be accurately measured by arranging the film pressure sensor between the automobile ceiling and the interior trim panel and arranging the resistor and the data collector connected with the film pressure sensor, and the device has the advantages of simplicity in operation, high accuracy and low cost. The system has wide application range, and can meet other requirements for carrying out force measurement in a narrow space.
The experimental test shows that the pressure born by the sensing area of the film pressure sensor has a higher linear relation with the inverse of the corresponding resistance value, so that the film pressure sensor is matched with a proper constant value resistance to manufacture a half-bridge measuring circuit, and the voltage response of the half-bridge measuring circuit has a higher linear relation with the pressure loaded on the film pressure sensor. The sensitivity coefficient and the zero drift of the half-bridge measuring circuit are obtained through testing, the sensitivity coefficient and the zero drift are input into the data acquisition device, and the device can be directly used for directly measuring the pressure of the ceiling to the interior trim part when the side air curtain is in point explosion, and has the advantages of simplicity in operation and high accuracy.
The film pressure sensor has the advantages of small volume, light weight, quick response, flexibility, low price, difficult damage and the like. The film pressure sensor is generally composed of a polyester film, a high-conductivity material and a nanoscale pressure sensing material. The bottom layer is a flexible film and a conductive layer, and the top layer is a flexible film and a pressure-sensitive material, so that the flexible film can bear larger pressure without damage.
Preferably, the data collector is also connected with a computer.
Preferably, the data acquisition device is also connected with an explosion-proof instrument, the explosion-proof instrument is connected with a gas generator, the gas generator is connected with an air bag, and the air bag is positioned between the automobile roof and the inner decorative plate during testing.
The data acquisition device is combined with the explosion instrument, so that the pressure between the automobile ceiling and the inner decorative plate in the whole explosion process can be recorded by taking the explosion moment as the zero moment, and the integrity of measured data is effectively ensured.
Preferably, the thickness of the film pressure sensor is less than 0.5mm.
Preferably, the sensing area of the film pressure sensor is circular, and the diameter of the sensing area is smaller than 5mm.
Through experimental tests, the pressure born by the film pressure sensor with the circular sensing area has a linear relation with the inverse of the corresponding resistance value to a very high degree, so that the sensing area is set to be circular, and the accuracy of a test result is further ensured.
Preferably, the length of the wiring extension of the film pressure sensor is greater than 30mm.
Wherein the wiring extension of the film pressure sensor is flexible and can be bent appropriately.
Preferably, the connection pin is connected to the resistor through a cable.
Preferably, the data collector is connected with the explosion-proof instrument through an integrated communication line.
Preferably, the explosion point instrument is connected with the gas generator through an explosion point line.
Preferably, the data collector is connected with the computer through a communication line.
The utility model has the beneficial effects that:
the system for testing the pressure of the side air curtain during the point explosion of the automobile can accurately measure the partial pressure of the ceiling to the inner decorative plate in the side air curtain unfolding process by arranging the film pressure sensor between the automobile ceiling and the inner decorative plate and arranging the resistor and the data collector connected with the film pressure sensor, has the advantages of simplicity in operation, high accuracy and low cost, has wide application range, can meet the requirements of other application force measurement in a narrow space, and has popularization and application values in the technical field of automobile part testing.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of a structure of a diaphragm pressure sensor;
FIG. 3 is a schematic diagram of a pressure test system during a side curtain ignition of an automobile;
FIG. 4 is a schematic structural view of a membrane pressure sensor assembled with a ceiling and an interior trim panel;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
the device comprises a 1-film pressure sensor, an 11-sensing area, 12-wiring pins and a 13-wiring extension area; 2-resistance; 3-a data collector; 4-a computer; 5-an explosion-igniting instrument; 6-a gas generator; 7-air bags; 8-a cable; 9-an integrated communication line; 10-igniting a wire; 14-communication lines; 15-a ceiling; 16-an interior panel; 17-lap joint.
Detailed Description
Further advantages and effects of the present utility model will become readily apparent to those skilled in the art from the disclosure herein, by referring to the accompanying drawings and the preferred embodiments. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
Examples
As shown in fig. 1 to 5, a system for pressure test during vehicle side curtain ignition comprises a film pressure sensor 1, a resistor 2 and a data collector 3, wherein during test, a sensing area 11 of the film pressure sensor 1 is positioned between a vehicle ceiling and an inner plaque, one wiring pin 12 of the film pressure sensor 1 is connected with the resistor 2, the other wiring pin 12 is connected with the data collector 3, and the resistor 2 is connected with the data collector 3 in parallel.
The film pressure sensor is directly clamped in the gap between the ceiling and the inner decorative plate, so that the acting force of the ceiling on the inner decorative plate can be directly measured, and the acting force is recorded as a pressure curve through the data acquisition device. After the test, complex calculation processing is not needed for the test data, and the collected data can be directly used. The half-bridge measuring circuit consisting of the film pressure sensor and the fixed resistor is simple and reliable, has no complex structure and is simple in manufacturing method. Under the condition of selecting a proper constant resistor, the response has high linearity, and the requirement of measurement accuracy is met.
The film pressure sensor is small in size, so that a plurality of film pressure sensors can be arranged side by side in the same test, and stress conditions of all positions of the lap joint area can be completely collected. And the quality is small (less than 0.5 g), and the double faced adhesive tape can be fixed by only using common cotton paper, and the arrangement is simple and convenient. The film pressure sensor has certain flexibility, is not easy to damage in the test, and has low price and low test cost.
In practical test, the film pressure sensor is fixed on the ceiling, and the ceiling can acquire data from the beginning of compression until the ceiling is separated from the B-pillar trim panel. The film pressure sensor is thin and is not in direct contact with the side air curtain, so that the unfolding posture of the side air curtain is not affected. The accuracy of the test result is effectively ensured.
In order to realize the simultaneous implementation of the explosion process and the data acquisition, the data acquisition device 3 is connected with the computer 4, the data acquisition device 3 is connected with the explosion instrument 5, the explosion instrument 5 is connected with the gas generator 6, the gas generator 6 is connected with the gas bag 7, and the gas bag 7 is positioned between the automobile roof and the inner decorative plate. So that the computer 4 directly controls the explosion instrument 5 to perform explosion.
For convenient arrangement and ensuring the accuracy of the test result, the thin film pressure sensor 1 with the thickness smaller than 0.5mm, the sensing area 11 being circular, the diameter of the sensing area 11 being smaller than 5mm and the length of the wiring extension area 13 being larger than 30mm is selected.
One of the wiring pins 12 is connected with the resistor 2 through a cable 8, the other wiring pin 12 is connected with the data collector 3 through the cable 8, the data collector 3 is connected with the explosion-proof instrument 5 through an integrated communication line 9, the explosion-proof instrument 5 is connected with the gas generator 6 through an explosion-proof line 10, and the data collector 3 is connected with the computer 4 through a communication line 14.
In the system for pressure test during automobile side curtain ignition in this embodiment, when the side curtain ignition test is actually prepared, the sensing area 11 of the film pressure sensor 1 is placed in the gap between the ceiling 15 and the overlap joint part 17 of the B-pillar trim panel 16, and the measuring surface of the sensing area 11 faces the ceiling 15 (the ceiling is softer than the trim part, and the pressure of the measuring surface is more uniform); fixing the film pressure sensor 1 by using cotton paper double faced adhesive tape; arranging the cable 8 of the film pressure sensor 1 to the outside of the vehicle body along the ceiling 15; the film pressure sensor 1 is connected with the fixed value resistor 2 in series, the data collector 3 is used for supplying power to the half-bridge measuring circuit after the series connection, and meanwhile the data collector 3 is used for collecting voltages at two ends of the fixed value resistor 2; in the same test, a plurality of similar film pressure sensors 1 can be arranged at different positions of the region to be tested and used for measuring pressure data of different positions;
connecting the gas generator 6 to the explosion detector 5 through an explosion line 10, wherein the explosion detector 5 can generate voltage enough for the gas generator 6 to be ignited, and the explosion time error can be controlled within 0.1 ms; the data collector 3 is connected with the explosion instrument 5 through the integrated communication line 9, and the integrated communication line 9 can realize communication and power supply functions; the data collector 3 is connected to the system control computer 4 through a communication line 14, so that the test system is built;
the control software of the computer 4 sends out an explosion command, the explosion instrument 5 ignites the gas generator 6, a large amount of gas generated after the explosion of the gas generator 6 is filled into the gas bag 7 of the side gas curtain, the gas bag 7 is gradually unfolded, when the gas bag 7 is contacted with the ceiling 15, the ceiling 15 starts to bear force, the ceiling 15 then applies pressure to the B-pillar inner decoration plate overlapping area 17, the film pressure sensor 1 clamped between the ceiling 15 and the B-pillar inner decoration plate overlapping area 17 generates resistance value change due to the pressure, so that voltage changes at two ends of the fixed value resistor 2 can be caused, the data collector 3 can collect voltage signals of the fixed value resistor 2, and pressure data are calculated through sensitivity coefficients and zero drift and recorded.
The method for calculating the sensitivity coefficient and zero drift of the half-bridge measuring circuit comprises the following steps: after the power supply voltage of the fixed value resistor 2 and the data collector 3 is selected, the linear relation curve between the voltage at two ends of the fixed value resistor 2 and the pressure loaded by the film pressure sensor 1 in the half-bridge measuring circuit can be calculated according to the pressure and resistance curve of the film pressure sensor 1 which is measured in the earlier stage, and the sensitivity coefficient and the zero drift are obtained. In addition, a calibration method can be adopted, a plurality of groups of known pressures are applied to the sensing area 11 of the film pressure sensor 1, the corresponding voltage response of the fixed value resistor 2 is directly measured, a linear relation curve is produced, and the sensitivity coefficient and the zero drift are obtained. After the sensitivity coefficient and the zero drift are obtained, the sensitivity coefficient and the zero drift can be recorded in a data acquisition system, and the data acquisition system can reversely solve and record the pressure value applied to the film pressure sensor 1 according to the voltage at the two ends of the constant resistor 2 in real time.
In summary, according to the system for testing the pressure of the side air curtain during the ignition of the automobile, the film pressure sensor is arranged between the automobile ceiling and the inner decoration plate, and the resistor and the data acquisition device connected with the film pressure sensor are arranged, so that the partial pressure of the ceiling to the inner decoration plate in the side air curtain expanding process can be accurately measured.
The above embodiments are merely preferred embodiments for fully explaining the present utility model, and the scope of the present utility model is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present utility model, and are intended to be within the scope of the present utility model.
Claims (10)
1. The system for pressure testing during automobile side air curtain explosion is characterized by comprising a film pressure sensor (1), a resistor (2) and a data collector (3), wherein during testing, an induction zone (11) of the film pressure sensor (1) is positioned between an automobile ceiling and an inner decoration plate, one wiring pin (12) of the film pressure sensor (1) is connected with the resistor (2), the other wiring pin (12) is connected with the data collector (3), and the resistor (2) is connected with the data collector (3) in parallel.
2. The system for pressure testing at the time of vehicle side curtain ignition according to claim 1, wherein the data collector (3) is further connected with a computer (4).
3. The system for pressure testing during vehicle side curtain ignition according to claim 1, wherein the data collector (3) is further connected with an ignition instrument (5), the ignition instrument (5) is connected with a gas generator (6), the gas generator (6) is connected with a gas bag (7), and the gas bag (7) is positioned between a vehicle roof and an inner decorative plate during testing.
4. System for pressure testing at the time of ignition of a side curtain of a car according to claim 1, characterized in that the thickness of the membrane pressure sensor (1) is less than 0.5mm.
5. System for pressure testing at the time of ignition of a side curtain of a car according to claim 1, characterized in that the sensing area (11) of the membrane pressure sensor (1) is circular, the diameter of the sensing area (11) being smaller than 5mm.
6. System for pressure testing at the time of ignition of a side curtain of a motor vehicle according to claim 1, characterized in that the length of the wiring extension (13) of the film pressure sensor (1) is greater than 30mm.
7. System for pressure testing at the time of ignition of a side curtain of a motor vehicle according to claim 1, characterized in that the wire pins (12) are connected to the resistor (2) by means of a cable (8).
8. A system for pressure testing at the time of vehicle side curtain ignition according to claim 3, characterized in that the data collector (3) is connected with the ignition instrument (5) through an integrated communication line (9).
9. A system for pressure testing at the time of ignition of a side curtain of an automobile according to claim 3, characterized in that the ignition instrument (5) is connected with the gas generator (6) through an ignition line (10).
10. The system for pressure testing at the time of vehicle side curtain ignition according to claim 2, wherein the data collector (3) is connected with the computer (4) through a communication line (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320326814.9U CN219416523U (en) | 2023-02-27 | 2023-02-27 | System for pressure test when automobile side air curtain point explodes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320326814.9U CN219416523U (en) | 2023-02-27 | 2023-02-27 | System for pressure test when automobile side air curtain point explodes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219416523U true CN219416523U (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320326814.9U Active CN219416523U (en) | 2023-02-27 | 2023-02-27 | System for pressure test when automobile side air curtain point explodes |
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| Country | Link |
|---|---|
| CN (1) | CN219416523U (en) |
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- 2023-02-27 CN CN202320326814.9U patent/CN219416523U/en active Active
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