KR20140029014A - Apparatus for for seatbelt - Google Patents

Abstract

The present invention relates to a seat belt device. The seat belt device according to the present invention includes a seat belt including a webbing reel in which webbing and webbing are wound, a motor for rotating the webbing reel, a control unit for diagnosing a state of a vehicle and outputting a driving command for the motor. And a communication unit configured to receive a motor driving command, perform a communication between the controller and the motor driving unit to drive the motor, and transmit the motor driving command.

Description

Seat belt device {Apparatus for for Seatbelt}

The present invention relates to a seat belt device of a vehicle, and more particularly, to separate the determination logic and the driving logic related to the driving of the motor for adjusting the restraint force of the seat belt, and to communicate with the logics to drive the motor. It relates to a seat belt device for controlling.

Background Art [0002] In general, a seat belt mounted on a vehicle is intended to prevent a secondary injury from occurring due to an impact force at the time of a collision or the like, by fixing the position of a passenger while the vehicle is running to the seat. In recent years, a function of winding the webbing of the seat belt automatically when the seat belt is provided with a suitable restraining force for the seat belt or when the buckle of the seat belt is separated is applied to the vehicle.

On the other hand, the seat belt device including the motor has a configuration including a control unit having a judgment logic and a drive logic together to control the motor for each seat belt.

However, in this configuration, when the decision logic and the driving logic are included in the same module, the adjacent decision logic and the driving logic may be subjected to electromagnetic interference by high currents.

In addition, when several circuits, such as a power supply circuit, a diagnostic circuit, and a memory circuit, are provided in a single control unit, the volume may be large, which may cause a space limitation for mounting the belt. There is a problem that this increases.

Accordingly, an object of the present invention is to physically separate the decision logic and the driving logic to reduce electromagnetic interference, and to control the number of control unit by controlling a plurality of motors with a control unit including one decision logic seat belt device In providing.

In order to achieve the above object, the seat belt device according to the present invention is a seat belt including a webbing reel, the webbing and the webbing is wound, a motor for rotating the webbing reel, diagnoses the state of the vehicle, the drive for the motor And a control unit for outputting a command, a motor driving unit for receiving the motor driving command, driving the motor, and a communication unit performing communication between the control unit and the motor driving unit to transmit the motor driving command.

In the seat belt device according to the present invention, since the control unit including the determination logic and the motor driving unit including the driving logic are physically separated, electromagnetic interference may be reduced.

The driving of a plurality of motors can be controlled by one control unit, so it is easy to reduce costs and secure space for mounting a seat belt.

In addition, it is possible to check whether communication is received between the control unit and the motor driving unit, thereby improving the reliability of the seat belt driving.

1 is a view schematically showing the configuration of a seat belt device according to an embodiment of the present invention.
2 is a view showing the configuration of a control system of the seat belt device according to an embodiment of the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with 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.

Hereinafter, the present invention will be described with reference to the drawings for describing an airbag system and a method of controlling the same according to embodiments of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view schematically showing a configuration of a seat belt device according to an embodiment of the present invention; FIG.

1, a seat belt apparatus according to an embodiment of the present invention includes a retractor 110 including a motor, a top anchor 120, a bottom anchor 160, a webbing 130, a webbing reel 112, A buckle 140, a tongue plate 150, a motor driving unit 230 for driving the motor, a communication unit 220, and a control unit 210.

 The webbing 130 is wound around a webbing reel 112 rotatably installed on the retractor 110. The webbing reel 112 is wound around the motor 110. The webbing reel 112 is fixed to the lower end of the center pillar (not shown) As shown in Fig. Thus, the restraining force of the seat belt can be controlled by the rotation driving of the motor.

The webbing 112 is inserted into the upper anchor 120 that is pulled out of the retractor 110 and fixed to the upper end of the center pillar 110. The buckle 140 and the tongue plate 160 ) So as to restrain the occupant.

The webbing 130 supporting the occupant is constituted by a chest belt 131 for supporting the chest of the passenger diagonally and a waist belt 132 for supporting the waist of the passenger, and one end of the waist belt 132 is connected to the lower anchor And the lower anchor 160 is fixed to the side of the seat 10 or the lower end of the center pillar.

With this structure, the seat belt is kept loose so that the occupant moves while the vehicle is running, but the control unit 210 determines the state of the vehicle. If the seat belt is determined to be in a dangerous state, Can be controlled.

For example, when a seat belt is restrained due to a collision, a collision, or a sudden deceleration of a vehicle, tension is generated on the seat belt and the seat belt is suddenly drawn out, the rotation of the motor is controlled so that the seat belt is no longer drawn . Thus, it is possible to support the occupant and prevent the occupant from being pushed forward.

As described above, the control system 200 of the seat belt device including the control unit 210, the communication unit 220 and the motor driving unit 230 for controlling the driving force of the motor to adjust the restraining force of the seat belt in detail below. Let's explain.

2 is a view showing a control system of a seat belt according to an embodiment of the present invention.

2, the control system of the seat belt may include a power supply unit 201, a control unit 210, a communication unit 220, a motor driver 230, and a sensor unit 205.

The power supply unit 201 receives power from the battery and supplies power to internal components of the seat belt control system 200 when the vehicle is started.

The controller 210 operates by receiving power from the power supply 201. The controller 210 may receive information related to the state of the vehicle from various sensor units 205 provided in the vehicle.

The sensor unit 205 may include an acceleration sensor, a wheel speed sensor, a buckle sensor, a collision sensor, a lane departure prevention sensor, a steering angle sensor, a radar, a brake pressure sensor, a rollover sensor, and other vehicle safety related sensors.

Accordingly, the control unit 210 is the safety of the vehicle, such as the acceleration of the vehicle, the speed of the wheel, whether the seat belt buckle detachment, steering angle, brake pressure, lane departure, whether there is an obstacle adjacent to the vehicle from the above sensors You can receive parameters related to.

The controller 210 may determine the dangerous state of the vehicle by analyzing the above-described parameters. In addition, when the dangerous state of the vehicle is determined, the controller 210 may select a motor to drive in response to the determined dangerous state of the vehicle, and control the rotation of the motor with respect to the selected motor.

When the controller 210 outputs a motor driving command to control the driving of the motor, the communication unit 220 receives the motor driving command.

The communicator 220 performs communication between the controller 210 and the motor driver 230. In this case, the communication scheme may be a network scheme such as a controller area network (CAN) scheme, a local interconnect network (LIN) scheme, or a Flex Ray scheme.

For example, when performing a CAN method of communication, the control unit 210 is connected to the CAN bus through the communication unit 220, and performs the CAN system control with the motor driver 230 connected to the CAN bus. Done.

As described above, when the control unit 210 and the motor driving unit 230 are configured as separate modules, the motor driving related determination logic included in the control unit 210 and driving logic included in the motor driving unit 230 are separated. Accordingly, electromagnetic interference between the determination logic and the driving logic is reduced, thereby improving the reliability of driving the motor.

In addition, the communication unit 220 does not unilaterally transmit only the motor driving command from the control unit 210 to the motor driving unit 230 when performing the communication as described above, and provides data for confirming whether or not the motor driving command is received. It can be included to enable intercommunication.

On the other hand, the motor driving unit 230 performs the above-described communication, and receives a motor driving command from the control unit 210, in response to this, to provide a rotation of the motor commanded by the control unit 210, the motor ( 240 to drive current.

The motor 240 is driven by receiving a driving current from the motor driver 230, thereby providing an appropriate restraining force on the seat belt.

In addition, further comprising a current sensor unit (not shown), the current sensor unit may sense the current value flowing in the motor, and feeds back the motor current value to the motor driver 230.

In the above, one seat belt has been described as an example, but may include a plurality of motors and a motor driving unit included in each of the plurality of seat belts.

In this case, the plurality of motor driving units may receive a motor driving command from the one control unit 210 by communicating with one control unit through the communication unit 220, and in response thereto, included in each of the plurality of seat belts. It is possible to control the driving of the motor.

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.

110: retractor 112: webbing reel
120: upper anchor 130: webbing 140: buckle 150: tongue plate
160: lower anchor 210: control unit
220: communication unit 230: motor drive unit
240: motor

Claims (4)

A seat belt including a webbing and a webbing reel to which the webbing is wound;
A motor for rotationally driving the webbing reel;
A control unit for diagnosing a state of the vehicle and outputting a driving command for the motor;
A motor driving unit which receives the motor driving command and drives the motor; And
And a communication unit configured to perform communication between the control unit and the motor driving unit to transmit the motor driving command. The method of claim 1,
And a motor driven by receiving current from the motor driver.
The restraint force of the seat belt is determined by the driving of the motor. The method of claim 1,
The communication method is a seat belt device, characterized in that any one of a controller area network (CAN) method, a local interconnect network (LIN) method and a Flex Ray method. The method of claim 1,
Wherein,
The seat belt device, characterized in that for transmitting the motor drive command including the data that can be confirmed whether the reception of the motor drive command.

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