JP2016179769A - Collision determination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a collision determination device that can determine collision mode accurately when a vehicle lateral collision occurs.SOLUTION: The collision determination device includes a partition wall 16 for partitioning a space 15 into multiple space parts 15a, 15b in a vehicle longitudinal direction. Pressure sensors 4a, 4b are respectively disposed in the multiple space parts 15a, 15b partitioned by the partition wall 16. A collision determination part 5 determines collision mode based on a difference between output values of respective pressure sensors 4a, 4b when a vehicle lateral collision occurs.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a collision determination device that determines a collision mode when a side collision (side collision) of a vehicle occurs.

  Conventionally, some vehicles are equipped with an occupant protection device for protecting an occupant at the time of a collision, for example, an airbag device. There are air bag devices that deal with various collisions. For example, when a vehicle has a side collision, the airbag is deployed and inflated between an occupant and a side body member (for example, a side door) and seated on a seat. There is something that protects the side of the passenger. Further, when a collision occurs, it is determined whether or not a collision that requires the airbag apparatus to be activated has occurred, and the airbag apparatus is activated based on the determination result. Specifically, there is one that determines whether or not a collision has occurred based on the pressure in the door at the time of a side collision, acceleration applied to the vehicle body, etc., and deploys an airbag when it is determined that it has occurred (for example, patents) Reference 1).

  Thus, by determining whether or not a collision has occurred based on the pressure in the door at the time of a side collision, acceleration applied to the vehicle body, or the like, the airbag device can be activated in an appropriate situation.

JP 2014-46862 A

  When it is determined that a side collision has occurred as described above, the safety of the occupant is enhanced by activating the occupant protection device such as the airbag device, but the occupant protection device is activated according to the collision mode. It is considered that the safety of passengers can be further improved. For example, it is considered that the safety of the occupant can be further improved by changing the activation method of the occupant protection device depending on whether the collision mode is a so-called pole collision or a barrier collision even in the same side collision.

  However, the present situation is that it is not possible to accurately determine the collision mode in the side collision, and establishment of a collision mode determination technique is desired.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a collision determination device that can accurately determine a collision mode when a side collision of a vehicle occurs.

  According to a first aspect of the present invention for solving the above problems, a pressure sensor for detecting a pressure in a space of a vehicle door formed by an inner panel and an outer panel, and a collision mode based on a detection result of the pressure sensor are provided. A collision determination unit that includes a partition wall that divides the space into a plurality of space portions in a vehicle front-rear direction, and the pressure sensor is divided into the plurality of partition walls. Each of the collision determination units is disposed in a space, and the collision determination unit determines a collision mode based on a difference in output value of each pressure sensor when a side collision of the vehicle occurs. .

  According to a second aspect of the present invention, in the collision determination apparatus according to the first aspect, the partition wall is provided continuously in the vertical direction of the space.

  According to a third aspect of the present invention, in the collision determination device according to the first or second aspect, the collision determination unit determines whether one of the plurality of pressure sensors has an output value exceeding a preset threshold value. In the collision determination apparatus, the collision mode is determined.

  According to the collision determination device of the present invention, it is possible to accurately determine the collision type of the side collision. Therefore, the safety of the occupant can be improved by activating an occupant protection device such as an airbag device in accordance with the determination result.

It is a figure which shows the door structure of a vehicle provided with the collision determination apparatus which concerns on this invention. It is a figure which shows schematic structure of the collision determination apparatus which concerns on this invention. It is a schematic diagram explaining each collision form. It is a graph which shows the fluctuation | variation of the output value of the pressure sensor in each collision form. It is a flowchart which shows an example of the collision determination control which concerns on this invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 and 2, the vehicle 1 includes a collision determination device 2 that determines a collision mode at the time of a side collision (side collision), and an airbag device 3 as an occupant protection device. Since the airbag apparatus 3 is an existing structure, description is abbreviate | omitted.

  The collision determination device 2 includes a plurality of pressure sensors 4 (4a, 4b) and an ECU (electronic control unit) 6 having a collision determination unit 5. In the present embodiment, the plurality of pressure sensors 4 are provided on the door 10 for getting on and off the vehicle.

  The vehicle entrance / exit door 10 includes an outer panel 11 that is an exterior member that forms an outer plate of the vehicle, and a door panel 13 that includes an inner panel 12 that is an interior member disposed on the passenger compartment side of the outer panel 11, and a resin. And a door trim 14 made of a material or the like and disposed on the vehicle compartment side of the inner panel 12. In the space 15 in the door panel 13, although not shown, a door window glass, a door lock system, and the like are accommodated. Each pressure sensor 4 is provided on the inner panel 12 and detects the pressure in the space 15.

  Here, the door panel 13 is provided with a partition wall 16 that divides the space 15 into a plurality of spaces in the front-rear direction of the vehicle 1. In the present embodiment, the partition wall 16 is provided on a surface of the inner panel 12 on the outer panel 11 side (vehicle width direction outer side), is orthogonal to the inner panel 12, extends in the vertical direction of the space 15, and is provided continuously. It has been. As described above, the door window glass or the like is arranged in the space 15, and the partition wall 16 is provided so as not to interfere with the door window glass or the like that moves up and down. For this reason, the first space portion 15a and the second space portion 15b communicate with each other in a normal state (a state in which no collision occurs) and are partitioned by the partition wall 16 but are completely blocked. Absent.

  The pressure sensors 4 (the first pressure sensor 4a and the second pressure sensor 4b) are disposed on the inner panels 12 of the first space portion 15a and the second space portion 15b. The first pressure sensor 4a detects the pressure in the first space 15a, and the second pressure sensor 4b detects the pressure in the second space 15b. The arrangement of the first pressure sensor 4a and the second pressure sensor 4b is not particularly limited, but in the present embodiment, the first pressure sensor 4a and the second pressure sensor 4b are arranged at the same height across the partition wall 16.

  As described above, although the end of the partition wall 16 is not in contact with the outer panel 11 and is positioned in the vicinity of the outer panel 11, the space between the first space 15a and the second space 15b is completely closed. Absent. However, since the partition wall 16 is provided, even when a pressure fluctuation occurs in one of the first space portion 15a and the second space portion 15b, the influence on the other pressure can be suppressed as small as possible. ing.

  When a side collision occurs in the vehicle 1 and the outer panel 11 of the door 10 is deformed to the indoor side due to a collision load, the volume of the first space portion 15a and / or the second space portion 15b decreases. Accordingly, the pressure in the first space portion 15a or the second space portion 15b or both temporarily rises from the atmospheric pressure at the normal time, but the first space portion 15a and the second space portion 15b Is partitioned by the partition wall 16, the degree of pressure increase in the first space portion 15 a and the second space portion 15 b varies depending on the collision mode. That is, the detected values of the first pressure sensor 4a and the second pressure sensor 4b differ depending on the collision mode.

  Then, when a side collision of the vehicle 1 occurs, the collision determination unit 5 determines a collision mode based on a difference between detection values detected by the first pressure sensor 4a and the second pressure sensor 4b.

  In the present embodiment, when the side collision of the vehicle 1 occurs, the collision determination unit 5 has any of the collision forms of “door front pole collision”, “door rear pole collision”, or “barrier collision”. Determine whether. The “door front pole collision” is a collision mode in which the columnar collision object 100 collides with the front of the door 10 of the vehicle 1 as shown in FIG. The “door rear pole collision” is a collision mode in which the columnar collision object 100 collides with the rear of the door 10 of the vehicle 1 as shown in FIG. The “barrier collision” is a collision mode in which the wall-shaped collision object 101 collides with a relatively wide range of the door 10 of the vehicle 1 as shown in FIG.

  As described above, in each collision mode, a difference occurs in the detection values of the first pressure sensor 4a and the second pressure sensor 4b. When the collision mode is “door front pole collision”, as shown in FIG. 4A, the detection value (solid line in the figure) by the first pressure sensor 4a greatly increases, and the detection by the second pressure sensor 4b. The increase in value (dotted line in the figure) is small. When the collision form is “door rear pole collision”, as shown in FIG. 4B, the detection value (dotted line in the figure) by the second pressure sensor 4b greatly increases and the detection by the first pressure sensor 4a. The increase in value (solid line in the figure) is small. When the collision mode is “barrier collision”, as shown in FIG. 4C, the detection value by the first pressure sensor 4a (solid line in the figure) and the detection value by the second pressure sensor 4b (dotted line in the figure). ) Will rise significantly.

  Therefore, when the side collision occurs, the collision determination unit 5 determines that the side collision is “door front pole collision” or “door rear” based on the difference between the detection values of the first pressure sensor 4a and the second pressure sensor 4b. It can be determined whether the collision mode is “pole collision” or “barrier collision”. Specifically, when the side collision occurs, the collision determination unit 5 exceeds the threshold value P1 set in advance by the detection value by the first pressure sensor 4a, and the detection value by the second pressure sensor 4b exceeds the threshold value P1. When not exceeding, it determines with the collision form being a "door front pole collision" (refer Fig.4 (a)). The collision determination unit 5 determines that the collision mode is “door rear pole collision” when the detection value of the first pressure sensor 4a does not exceed the threshold value P1 and the detection value of the second pressure sensor 4b exceeds the threshold value P1. ] (See FIG. 4B). Further, the collision determination unit 5 determines that the collision mode is “barrier collision” when both the detection value of the first pressure sensor 4a and the detection value of the second pressure sensor 4b exceed the threshold value P1. To do.

  For example, as shown in the flowchart of FIG. 5, when the collision determination unit 5 detects a side collision of the vehicle 1 in step S <b> 1, the collision determination unit 5 determines the collision mode after step S <b> 2.

  In step S2, it is determined whether or not the condition that the detection value of the first pressure sensor 4a is larger than the threshold value P1 and the detection value of the second pressure sensor 4b is equal to or less than the threshold value P1 is satisfied. If the condition is satisfied (step S2: Yes), it is determined that the collision mode is “door front pole collision” (step S3). On the other hand, when the condition is not satisfied (step S2: No), the process proceeds to step S4.

  In step S4, it is determined whether or not the condition that the detection value of the first pressure sensor 4a is equal to or smaller than the threshold value P1 and the detection value of the second pressure sensor 4b is larger than the threshold value P1 is satisfied. When this condition is satisfied (step S4: Yes), it is determined that the collision mode is “door rear pole collision” (step S5). On the other hand, if the condition is not satisfied (step S4: No), the detected values of the first pressure sensor 4a and the second pressure sensor 4b both exceed the threshold value P1, so the collision mode is “barrier collision”. (Step S6).

  When the collision mode is determined in this way, appropriate activation of the airbag device 3 is executed according to the determination result. That is, the activation conditions of the airbag device 3, for example, the timing at which the airbag is deployed, the speed at which the airbag is deployed, etc. are preset according to each collision mode, and when the collision mode is determined as described above, The airbag device 3 is activated under a predetermined activation condition corresponding to the determination result.

  Thereby, the airbag apparatus 3 can be started on the starting conditions suitable for each collision form. For example, if it is a “door rear pole collision” as in this embodiment, the deformation location of the door 10 varies depending on each collision mode, such as the amount of deformation in the vicinity of the occupant increases, but by appropriately determining the collision mode, In view of the danger to the passenger, the airbag device 3 corresponding to each collision mode (deformation mode) can be activated. Accordingly, the safety of the passenger can be improved regardless of the collision mode. In addition, the starting conditions of the airbag apparatus 3 in each collision form are not specifically limited, What is necessary is just to set suitably in consideration of the structure of a vehicle.

  Further, in the present embodiment, the partition wall 16 is provided continuously at the middle portion of the inner panel 12 in the vehicle front-rear direction so as to be orthogonal to the inner panel 12 and extending in the vertical direction of the space 15. A difference between the detection values of 4a and the second pressure sensor 4b tends to appear. In particular, when the end of the partition wall 16 comes into contact with the outer panel 11 at the time of a collision, a difference in detection values is more likely to appear. Therefore, the rise of the pressure fluctuation waveform is accelerated and the pressure fluctuation gradient becomes steep, so that it is possible to detect a collision at an early stage. Therefore, it is possible to more accurately determine the collision mode based on the difference between the detected values.

  Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment. The present invention can be variously modified without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the partition wall 16 is provided in the center portion of the door in the front-rear direction of the vehicle, and the first space portion 15a and the second space portion 15b are formed, but the partition wall 16 is provided. The position is not particularly limited. The partition wall 16 is not limited to one, and a plurality of partition walls 16 may be provided in the space 15. In the case where a plurality of partition walls 16 are provided, it is desirable to provide them at equal intervals and in parallel with the front-rear direction of the inner panel 12. As the number of partition walls 16 increases, the number of pressure sensors 4 also increases (the number obtained by adding 1 to the number of partition walls).

  Moreover, although the collision determination apparatus provided with the pressure sensor provided in the door of the vehicle side surface was illustrated in the above-mentioned embodiment, arrangement | positioning of a pressure sensor is not limited to this.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Collision determination apparatus 3 Airbag apparatus 4a 1st pressure sensor 4b 2nd pressure sensor 5 Collision determination part 10 Door 11 Outer panel 12 Inner panel 13 Door panel 14 Door trim 15 Space 15a 1st space part 15b 2nd space Part 16 Partition wall 100, 101 Colliding object

Claims (3)

A collision determination device comprising: a pressure sensor that detects a pressure in a vehicle door space formed by an inner panel and an outer panel; and a collision determination unit that determines a collision mode based on a detection result of the pressure sensor. And
A partition wall that divides the space into a plurality of space portions in the longitudinal direction of the vehicle;
The pressure sensors are respectively disposed in the plurality of spaces defined by the partition walls;
The collision determination device is characterized in that, when a side collision of the vehicle occurs, the collision determination unit determines a collision mode based on a difference between output values of the pressure sensors. The collision determination device according to claim 1,
The collision determination device, wherein the partition wall is provided continuously in the vertical direction of the space. In the collision determination device according to claim 1 or 2,
The collision determination device, wherein the collision determination unit determines the collision mode according to which pressure sensor output value of a plurality of pressure sensors exceeds a preset threshold value.

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