KR20150025608A - A crash sensing appliance and control method of a vehicle - Google Patents

A crash sensing appliance and control method of a vehicle Download PDF

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Publication number
KR20150025608A
KR20150025608A KR20130103370A KR20130103370A KR20150025608A KR 20150025608 A KR20150025608 A KR 20150025608A KR 20130103370 A KR20130103370 A KR 20130103370A KR 20130103370 A KR20130103370 A KR 20130103370A KR 20150025608 A KR20150025608 A KR 20150025608A
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KR
South Korea
Prior art keywords
acceleration sensor
acceleration
vehicle
airbag
threshold value
Prior art date
Application number
KR20130103370A
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Korean (ko)
Inventor
정석현
Original Assignee
현대모비스 주식회사
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Publication date
Application filed by 현대모비스 주식회사 filed Critical 현대모비스 주식회사
Priority to KR20130103370A priority Critical patent/KR20150025608A/en
Publication of KR20150025608A publication Critical patent/KR20150025608A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B60R21/0136—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to actual contact with an obstacle, e.g. to vehicle deformation, bumper displacement or bumper velocity relative to the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R2021/01013—Means for detecting collision, impending collision or roll-over
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/304—Acceleration sensors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

The present invention relates to a crash sensing apparatus of a vehicle and a control method comprising: an airbag module, a first acceleration sensor which is installed at the front of the vehicle to measure the acceleration in a crash, and an airbag controller which is installed in the first acceleration sensor to control the air bag module according to the collision, wherein the airbag controller includes a second acceleration sensor measuring the acceleration of the lateral side and front side in the crash and the airbag module operates if a measured value measured in the first acceleration sensor and a measured value measured of the acceleration of the front of the second acceleration sensor are greater than a predetermined threshold. The control method of the crash sensing apparatus of the vehicle when the airbag is unfolded comprises: a first step of transferring the threshold measured of an acceleration signal of the vehicle to the airbag controller; a second step of calculating the threshold in the first step to average; and a third step of comparing the air bag module with the threshold with the calculated average value so that the airbag module operates if the threshold is greater than and equal to the average value.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a collision detection apparatus and a control method for a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a collision sensing apparatus and a control method for a vehicle, and more particularly,

BACKGROUND ART [0002] In recent years, accidents of a vehicle have become frequent. In general, a frontal impact sensor (FIS) is installed on a side member of a front end module to detect a collision of a vehicle. The FIS senses the collision position of the vehicle by the collision object and transmits a signal to the airbag module, and the airbag module actuates the airbag corresponding to the collision position.

When the measurement values transmitted to the airbag control unit in the acceleration sensor or the like installed to measure the speeds in the forward direction (X axis) and the lateral direction (Y axis) in the traveling direction of the vehicle are simultaneously higher than a predetermined threshold value, the restraint device is deployed, The forward (X-axis) force also acts when the vehicle collides obliquely instead of vertically, thereby causing the passenger restricting device to open in the morning.

In the above case, in order to utilize the lateral (Y axis) acceleration signal generated in the front (X axis) collision in the lateral (Y axis) collision but not the front The Y-axis threshold value for determining the passenger protection device is set to be low, and the passenger protection device can be opened in the morning.

SUMMARY OF THE INVENTION It is an object of the present invention to reduce a malfunction of a passenger restraint device in a frontal collision and a side collision in an airbag control part in a collision detection device and a control method of a vehicle.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, in a collision sensing apparatus and method for a vehicle according to an embodiment of the present invention, there is provided an apparatus and a method for controlling a collision of a vehicle, the collision sensing apparatus including a first acceleration sensor installed in front of the vehicle, And an airbag control unit for controlling the airbag module according to a collision, wherein the airbag control unit includes a second acceleration sensor for measuring an acceleration at the time of a frontal collision and a lateral collision, The control unit compares the measurement value measured by the second acceleration sensor with the measured value of the second acceleration sensor so as to advance the operating point of the airbag module when the measurement value is higher than a predetermined threshold value or lower than a predetermined threshold value, And the control method at the time of deployment of the airbag is a first method for transmitting the measurement value measured by the acceleration signal of the vehicle to the airbag control unit A second step of calculating an average value by calculating the measured value in the first step, and a second step of comparing the measured value with a threshold value obtained by averaging in the second step, and if the measured value is greater than or equal to the measured value, And a third step.

The details of other embodiments are included in the detailed description and drawings.

According to the present invention, there is one or more of the following effects.

The acceleration sensor signal is used in the frontal collision and the side collision of the vehicle to improve the strength of the passenger protection device, thereby providing the advantage that the frontal passenger protection device is deployed in a side collision. It is possible to prevent the passenger injury performance deterioration that may occur due to the deployment of the frontal airbag.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a vehicle,
FIG. 2 is a graph showing an X-axis signal of the first velocity sensing sensor,
3 is a graph showing the Y-axis signal of the second velocity sensing sensor,
4 is a graph showing a Y-axis signal of the second velocity sensing sensor,
5 is a flowchart showing a procedure according to a control method of a collision sensing apparatus of a vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the drawings for explaining a collision sensing apparatus and a control method of a vehicle according to embodiments of the present invention.

A preferred vehicle collision sensing apparatus and control method can be changed by a person skilled in the art, and in the embodiment of the present invention is a collision sensing apparatus and a control method of a vehicle.

2 is a graph showing an X-axis signal of a first velocity sensor, FIG. 3 is a graph showing a Y-axis signal of a second velocity sensor, and FIG. FIG. 4 is a graph showing a Y-axis signal of the second speed sensing sensor, and FIG. 5 is a flowchart showing a sequence according to a control method of a collision sensing apparatus of a vehicle.

1 to 5, an airbag module (not shown) provided in a vehicle for inflating and deploying an airbag with a built-in airbag, a first acceleration sensor 10 installed in front of the vehicle for measuring an acceleration at the time of a frontal collision, And a second acceleration sensor 20 for measuring a forward (X-axis) and lateral (Y-axis) acceleration at the time of a collision in front of the vehicle are installed in a vehicle and are controlled by an airbag control unit (not shown) And a second acceleration sensor (20) mounted to measure an acceleration at the time of a collision, wherein the airbag control unit is mounted with a clearing sensor having a clearing logic set to control a malfunction.

The first acceleration sensor 10 transmits the measurement value obtained by measuring the acceleration at the time of collision in the forward direction (X axis), which is the traveling direction of the vehicle, to the airbag control unit, and is stored in the airbag control unit.

The second acceleration sensor 20 outputs a measurement value of the acceleration measured on the front (X axis) and a measurement value of the acceleration (lateral) measured on the front (X axis) And stored in the airbag control unit. That is, the second acceleration sensor 20 measures forward (X axis) and lateral (Y axis) in a front collision and measures forward (X axis) and lateral (Y axis) .

2 is a graph showing an X-axis signal of the first velocity sensor.

Referring to FIG. 2, a measurement value obtained by measuring a forward (X-axis) acceleration in the first acceleration sensor 10 transmitted to the airbag control unit is compared with a preset threshold value, and the measurement value of the first acceleration sensor 10 (Y axis) acceleration of the second acceleration sensor is lower than a preset threshold value, the airbag module determines that the front passenger protection device is deployed so that the airbag operates do.

3 is a graph showing a Y-axis signal of the second velocity sensing sensor.

3, the measured value of the first acceleration sensor 10 and the measured value measured at the front (X) of the second acceleration sensor 20 are equal to or higher than a preset threshold value for the airbag control unit, If the measurement value of the lateral acceleration (Y axis) of the acceleration sensor is higher than or equal to a predetermined threshold value, the airbag module determines that the front passenger protecting device and the side passenger protecting device are deployed and operates the airbag.

4 is a graph showing a Y-axis signal of the second velocity sensing sensor.

4, a measurement value obtained by measuring the lateral (Y-axis) acceleration of the second acceleration sensor 20 transmitted to the airbag control unit is compared with a preset threshold value, and the measurement value of the second acceleration sensor 20 Is higher than the preset lowest threshold value and lower than the highest threshold value, the airbag module determines that the airbag operates.

5 is a flowchart showing a procedure according to a control method of a collision sensing apparatus of a vehicle.

5, a first acceleration sensor 10, a second acceleration sensor 20, and a clearing sensor (not shown) are provided to detect acceleration due to a collision of a vehicle, The accelerations of the first acceleration sensor signal S110, the second acceleration sensor S130, the Y axis signal S120 and the acceleration signal of the Safing sensor S150) to the airbag control unit.

The X-axis signal S110 of the first acceleration sensor, the X-axis signal S120 and the Y-axis signal S130 of the second acceleration sensor and the signal S150 of the clearing sensor are inputted to the respective low-pass filters S111, S121, S131, and S151. At this time, it is preferable that the low-pass filter passing the signal of the clearing sensor has a -3 dB cut-off frequency of 100 Hz.

The acceleration measurement value of the signal S110 of the first acceleration sensor passes through the low-pass filter S111, integrates the measurement values passed through the low-pass filter by a predetermined number, calculates a moving average, and calculates a moving average value (S112). The moving average value is compared with a preset threshold (S113).

The acceleration measurement value of the Y-axis signal S120 of the second acceleration sensor passes through the low-pass filter S121, integrates the measurement values passed through the low-pass filter by a preset number, calculates a moving average, (S122). The moving average value is compared with a predetermined threshold value or less (S123). The X axis moving average threshold value and the speed threshold value of the second acceleration sensor are calculated by integrating the measured values of the Y axis signals of the first acceleration sensor and the second acceleration sensor.

The moving average threshold value is determined to be true if the moving average value of the first acceleration sensor is greater than or equal to a preset threshold value and the moving average value of the second acceleration sensor Y axis signal is greater than a preset minimum threshold value If it is smaller, the first threshold value is determined to be true and the X-axis signal of the second acceleration sensor is sensed (S140). If it is determined to be false at this time, the second threshold value is transmitted and the X-axis signal of the second acceleration sensor is sensed (S140).

The speed threshold value is determined to be true if the moving average value of the first acceleration sensor is greater than or equal to a preset threshold value and if the moving average value of the second acceleration sensor Y axis signal is greater than a predetermined threshold value or smaller than a predetermined threshold value The first threshold value is transmitted and the X-axis signal of the second acceleration sensor is sensed (S141). If it is determined to be false at this time, the second threshold value is transmitted and the X-axis signal of the second acceleration sensor is sensed (S140).

The acceleration measurement value of the X-axis signal S130 of the second acceleration sensor passes through the low-pass filter S131, integrates the measurement values passed through the low-pass filter by a predetermined number, calculates a moving average, (S132). At the same time, the speed is calculated to calculate the speed value (S134). The moving average value of the X-axis signal of the second acceleration sensor is compared with the moving average threshold value, and if the moving average value is equal to or greater than the moving average value, the detection logic detects (S133) If the speed value is equal to or greater than the speed threshold value, the detection logic simultaneously detects the speed value (S135). At this time, if the moving average value is smaller than the moving average threshold value, the moving average calculation is performed again. If the speed value is smaller than the speed threshold value, the speed calculation is performed again.

The measurement value measured simultaneously with the first acceleration sensor and the second acceleration sensor passes through the low-pass filter S151 and passes through the low-pass filter to perform the shaping logic (S152) A result obtained by comparing the moving average value and the moving average threshold value and a result of comparing the speed value and the speed threshold value are sensed (S153), so that the occupant restraint device is operated. Such a clearing logic can be implemented by various methods, and when the clearing sensor is higher than a predetermined threshold value, the result of the first acceleration sensor and the second acceleration sensor is sensed and the passenger restraint device is activated to deploy the airbag.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

<Detailed Description of Main Drawings>
10: first acceleration sensor 20: second acceleration sensor

Claims (4)

Airbag module;
A first acceleration sensor installed at the front of the vehicle for measuring an acceleration at the time of a frontal collision; And
And an airbag control unit installed in the vehicle for controlling the airbag module according to a collision,
Wherein the airbag-
A second acceleration sensor for measuring an acceleration of the front and the side at the time of a frontal collision is mounted,
Wherein the airbag module operates when the measured value measured by the first acceleration sensor and the measured value measured by the second acceleration sensor are higher than a preset threshold value.
The method according to claim 1,
Wherein the airbag module is operated when the measured value of the lateral acceleration measured by the second acceleration sensor is higher than a predetermined threshold value or lower than a predetermined threshold value.
A first step of transmitting measurement values obtained by measuring front and rear acceleration at the time of a collision of a vehicle to an airbag control unit;
A second step of calculating an average value by calculating the measured value in the first step; And
And a third step of comparing the measured value with a threshold obtained by averaging in the second step and operating the airbag module if the measured value is large.
The method of claim 3,
And a third step of comparing the measured value with the threshold value obtained by the averaging in the second step, and if the measured value is greater than a predetermined threshold value and smaller than a predetermined threshold value, A method of controlling a sensing device.

KR20130103370A 2013-08-29 2013-08-29 A crash sensing appliance and control method of a vehicle KR20150025608A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101704263B1 (en) 2015-09-18 2017-02-08 현대자동차주식회사 Collision detection system for vehicle and corresponding method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101704263B1 (en) 2015-09-18 2017-02-08 현대자동차주식회사 Collision detection system for vehicle and corresponding method

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