KR20050061002A - Grade sensor for vehicles and safety belt's tension adjusting system using the same - Google Patents

Abstract

The present invention is a tilt sensor installed in the vehicle; A control unit configured to detect the inclination of the vehicle by receiving the detection information of the inclination detection sensor; A seat belt tension control system including a step motor for adjusting a tension of the seat belt according to a signal of the control unit, and a fixed first member; A second member rotatably coupled to the first member, the second member rotating according to the inclination of the vehicle so that the distance from the first member is closer or further away from the first member; A magnet installed on one of the first member and the second member; And an induction electromotive force sensing means formed of a coil wound around the magnet, the first member and the second member being provided toward the magnet.

Description

Gradient detection sensor of vehicle and tension control system of seat belt using it {GRADE SENSOR FOR VEHICLES AND SAFETY BELT'S TENSION ADJUSTING SYSTEM USING THE SAME}

The present invention relates to a tilt sensor of a vehicle and a tension control system of a seat belt using the same, and more particularly, to a tilt of a vehicle using sensing information of a tilt sensor and sensing information of the tilt sensor. According to the tension of the seat belt is to control the tension control system of the seat belt so that the vehicle driver and passengers feel a sense of stability.

In general, the seat belt of the vehicle is composed of a buckle, webbing and tongue plate, and the driver or passenger sitting on the vehicle seat is configured to fasten the tongue plate to the buckle by adjusting the length of the webbing by pulling the tongue plate. The seat belt of the vehicle protects the driver by preventing the driver from being separated from the seat by supporting the driver when the driver is disengaged from the seat, that is, when the force is applied toward the front window of the vehicle, such as during a collision or sudden braking.

However, such a seat belt is conventionally capable of fastening the driver only during a collision and during a sudden braking, so that the driver cannot be locked when the seat belt is loose when the vehicle descends the slope, so that the driver's body is in front of the vehicle. It cannot be prevented from tilting toward the window side. Therefore, there is a problem that the driver is traveling on the slope in a state in which the driver does not feel a sense of stability by the seat belt.

However, since the seat belt is a device that allows the driver of the vehicle to drive while feeling a sense of safety beyond the function of protecting the driver in the event of a vehicle crash, there is a need for improvement in this problem. In particular, when the driver of the vehicle is inclined to the front of the vehicle while driving on the slope, it is not only an obstacle to safe driving, but also causes the driver to feel tired while driving on the slope because the driver drives in a tensioned state to support his / her body. It becomes a factor.

The present invention devised to solve the above problems, by adjusting the seat belt tension according to the inclination of the vehicle to secure the vehicle driver to the seat, to prevent the vehicle driver from inclining toward the front of the vehicle in a comfortable state An object of the present invention is to provide a tension control device for a seat belt that enables driving while feeling a sense of stability.

In addition, an object of the present invention is to provide an inclination sensor of a vehicle that can efficiently detect the inclination of the vehicle according to the running of the inclined vehicle.

The present invention to achieve the above object, the inclination detection sensor installed in the vehicle; A control unit configured to detect the inclination of the vehicle by receiving the detection information of the inclination detection sensor; It provides a seat belt tension control system comprising a step motor for adjusting the tension of the seat belt in accordance with the signal of the control unit.

According to the invention, the inclination detection sensor, the fixed first member; A second member moving according to the inclination of the vehicle; And sensing means installed on the first member or the second member to sense a distance between the first member and the second member. Preferably, the second member is attached to the first member. Rotatably coupled and rotated such that the distance between the first member and the second member is closer or further away according to the vehicle inclination, and the sensing means is installed on any one of the first member and the second member. And an induction electromotive force sensing means formed of a coil wound around the magnet on the other side, the induction electromotive force sensing means being generated by induction electromotive force generated as the distance from the magnet changes. Configured to input an induced current to the control unit.

In particular, the magnet is composed of an iron core and a coil wound around it, it is preferable that the coil is formed of an alternating electromagnet that is powered through an alternator.

The present invention provides a tilt sensor for sensing the tilt of the vehicle, to achieve another object, the first member is fixed; A second member rotatably coupled to the first member, the second member rotating according to the inclination of the vehicle so that the distance from the first member is closer or further away from the first member; A magnet installed on one of the first member and the second member; And an induction electromotive force sensing means formed of a coil wound around the magnet, the first member and the second member being provided toward the magnet.

Preferably, the magnet is composed of an iron core and a coil wound thereon, the coil is composed of an alternating electromagnet that is powered through an alternator.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of a tilt sensor of a vehicle according to the present invention, Figure 2 is a configuration diagram of a seat belt tension control system according to the present invention.

Referring to FIG. 1, the inclination sensor 10 of the vehicle according to the present invention includes a fixed first member 12, a second member 14 moving according to the inclination of the vehicle, a magnet and an induced electromotive force sensing means. Include. In particular, the second member 14 is rotatably coupled to the center of the first member and rotates according to the inclination of the vehicle, such that the distance between the first member 12 and the second member 14 depends on the inclination of the vehicle. It is configured to be variable, i.e., closer or farther away. That is, when the vehicle travels in parallel, the second member 14 maintains the horizontal state as in the a state so that the first member 12 and the second member 14 maintain 90 °, and the vehicle is inclined. When the vehicle travels, the second member 14 also rotates according to the inclination angle of the traveling path so that the angle θ between the first member 12 and the second member 14 is changed, so that the first member 12 and the second member are changed. 14 are configured to be close to each other.

A magnet is installed in any one selected from the first member 12 and the second member 14. In this embodiment, the magnet is provided in the fixed first member 12. The magnet may be a permanent magnet, but in the present embodiment, the magnet is composed of an iron core 22 and a coil 23, and is formed of an electromagnet in which magnetic force is formed by applying power to the coil 23 from a power source of the vehicle. In particular, since the inclination sensor installed in the vehicle is to determine the inclination during the driving of the vehicle, it is necessary to connect the coil to the alternator 26 which generates power only while driving to form an AC electromagnet 20 to reduce unnecessary power consumption. It is preferable in terms of.

The second member 14 is provided with an induction electromotive force sensing means 30 composed of a coil 34 wound around the cylindrical member 32 toward the AC electromagnet 20. Induction electromotive force detecting means 30, the magnetic flux passing through the coil changes when the distance to the AC electromagnet 20 is changed according to the electromagnetic induction phenomenon, the induced electromotive force (V) is generated in the coil, and the induced electromotive force ( V) is calculated by Farday's law. That is, as the distance between the induction electromotive force sensing means 30 and the AC electromagnet 20 varies according to the angle θ between the first member 12 and the second member 14, the induction electromotive force sensing means 30. ), Different induced electromotive force is generated by Faraday's law depending on the angle θ.

The inclination sensor according to the present invention is configured to accurately measure the inclination of the vehicle by using the change of the induced electromotive force according to the change of the magnetic flux passing through the coil of the induction sensing means according to the change of the inclination.

2, the seat belt tension control system according to the present invention detects the inclination of the vehicle using the inclination monitoring sensor 10, and inputs the detection information into the control unit 40 to control the unit 40. It is configured to drive the step motor 50 installed in the seat belt of the vehicle to adjust the tension of the seat belt.

 An inclination monitoring sensor 10 according to the present invention may be used a conventional inclination monitoring sensor, according to an embodiment of the present invention, the fixed first member 12, the second member moving in accordance with the inclination of the vehicle And a distance between the first member 12 and the second member 14 by sensing means for sensing the distance between the first member 12 and the second member 14. Detect and tilt the vehicle.

Preferably, the second member 14 is rotatably coupled about the central axis of the first member 12 so that the second member 14 and the first member 12 and the first member 12 rotate as the vehicle is inclined. The distance of the two members 14 is comprised. That is, when the vehicle travels in parallel, the second member 14 maintains the horizontal state, and the first member 12 and the second member 14 maintain 90 °. The second member 14 is also rotated according to the inclination angle of the first member 12 and the second member 14 while the angle θ between the first member 12 and the second member 14 is changed. Configured to be close to each other.

The sensing means may be configured as a distance sensor installed on the first member 12 and the second member 14 to detect a distance between the first member and the second member. For example, a sensor is installed on the first member 12 and a reflector is installed on the second member 14 to reflect the output signal of the sensor. It can be configured to detect.

According to an embodiment of the present invention, the sensing means is composed of a magnet installed on any one selected from the first member 12 and the second member 14 and the induced electromotive force sensing means 30 installed on the other one. In this embodiment, the magnet is provided in the fixed first member 12. The magnet may be a permanent magnet, but in this embodiment, the electromagnet 20 is formed of an iron core 22 and a coil 24 so that power is applied to the coil 24 from a vehicle power source. Is formed. In particular, since the inclination detection sensor installed in the vehicle is for determining the inclination of the vehicle while driving, it is unnecessary to connect the coil 22 to the alternator 26 that generates power only while driving, and to form the AC electromagnet 20. It is desirable in terms of reducing waste.

The second member 14 is provided with an induction electromotive force sensing means 30 composed of a coil 34 wound around the cylindrical member 32 toward the magnet. The induced electromotive force detecting means 30 may detect the induced electromotive force V generated by changing the magnetic flux passing through the coil 34 when the distance from the AC electromagnet 20 changes according to the electromagnetic induction phenomenon. The angle θ varies according to the inclination of the driving path, that is, according to the inclination of the vehicle, and accordingly, the induced electromotive force V changes as the magnetic flux passing through the coil of the induction electromotive force sensing means 30 changes. To measure the inclination of the vehicle.

The control unit 40 according to the present invention is a calculation unit 42 for calculating the inclination in accordance with the change amount of the induced electromotive force (V) input to the inclination sensor 10 as described above, and measured by the calculation unit 42 It is composed of a control unit 44 for driving the step motor 50 in accordance with the steps set according to the inclination. The control unit 44 is pre-set the drive end of the appropriate step motor 50 in accordance with the tension of the appropriate seat belt according to the inclination and the tension required for the seat belt. Accordingly, the controller 44 determines the driving stage of the step motor 50 by comparing the inclination input from the calculator 42 with preset data, and controls the step motor 50 accordingly. The appropriate tension of the seat belt according to the inclination set in the control unit 44, and the driving stage of the step motor is determined in consideration of the characteristics of the vehicle, the characteristics of the seat belt device, and the like. The control unit 40 may be one computer device that integrally performs the functions of the calculator 42 and the controller 44.

An amplifier 41 is provided between the control unit 40 and the induced electromotive force detecting means 30 to amplify the voltage of the induced electromotive force generated in the induced electromotive force detecting means.

Hereinafter, an operation according to an exemplary embodiment of the present invention shown in FIG. 2 will be described with reference to FIG. 3.

The seat belt tension control system according to the present invention determines whether the vehicle is traveling in parallel or entered the ramp by a circulation loop for detecting whether the induced electromotive force monitoring means 30 generates the induced current (S10).

If the vehicle enters the slope, the second member 14 is rotated according to the inclination degree, so that the distance to the first member 12, that is, the angle θ becomes small, and guided according to the size of the angle θ. As the magnetic flux passing through the coil 34 of the electromotive force sensing means 30 is varied, an induced electromotive force corresponding to the angle θ is generated. The calculation unit 42 calculates the inclination of the driving path, that is, the inclination of the vehicle, using the voltage of the induced electromotive force input from the induction electromotive force detecting means 30 (S20).

The controller 44 compares the inclination input from the calculator 42 with the preset data (S25), thereby determining the driving stage of the step motor 50 according to the inclination and controlling the step motor 50 to be driven. do. For example, when the inclination is greater than 0 ° and less than 5 ° (S32), the control unit 44 controls the step motor 50 to be driven in one stage (S42), and when the inclination is greater than 5 ° and less than 10 ° (S34). The unit 44 controls the step motor 50 to be driven in two stages (S44), and when the inclination is less than 10 ° and less than 15 ° (S36), the control unit 44 drives the step motor 50 in three stages. If the inclination exceeds 15 degrees (S38), the control unit 44 controls the step motor 50 to be driven in four stages (S48).

In addition, when the vehicle travels the inclination again and then travels in parallel or upward inclination, the operation of the step motor 50 is stopped (S49) and the tension of the seat belt is adjusted to the initial state.

According to the multi-stage driving of the step motor, the tension of the seat belt is adjusted (S50) so that the driver can drive while feeling securely supported in the driver's seat. In addition, when induction electromotive force is generated in the induction electromotive force detecting means again after the tension is adjusted in this way, the tension of the seat belt is adjusted again according to the flow.

According to the present invention, since the induced electromotive force sensing means reacts sensitively to the change of the inclination even when the vehicle enters the inclination parallel again or the inclination of the inclination becomes small, according to the present invention, The tension of the seat belt can be adjusted to the most appropriate state. Therefore, the driver can drive in a safer and more comfortable state.

Although the present invention described above has been described with reference to one embodiment, the present invention is not limited thereto and modifications to such an extent that those skilled in the art can easily carry out the present invention are not limited thereto. It is obvious that it belongs to the technical idea.

According to the seat belt tension control system of the present invention, the tension of the seat belt is adjusted in accordance with the inclination of the vehicle to secure the driver to the seat with the appropriate tension, thereby preventing the driver from inclining toward the front of the vehicle, the driver feels comfortable in a comfortable state You can drive while feeling.

In addition, according to the inclination detection sensor of the present invention, since the inclination of the driving path that the vehicle is traveling, that is, the inclination of the vehicle can be detected using the induced electromotive force generated in the induction electromotive force detecting means, the inclination of the driving path of the vehicle is changed It is possible to accurately detect the point of time and the direction of the inclination change, it is possible to efficiently detect the inclination of the vehicle according to the running of the inclination of the vehicle.

1 is a block diagram of a tilt detection sensor of a vehicle according to the present invention.

2 is a block diagram of a seat belt tension control system according to the present invention.

3 is an operational flowchart according to an embodiment of the present invention shown in FIG.

* Explanation of symbols for main parts of the drawings

10; Tilt sensor 12; A first member;

14; Second member 20; AC electromagnet

30; Induction electromotive force sensing means 40; Control unit

50; Step motor

Claims (7)

A tilt sensor installed in the vehicle; A control unit configured to detect the inclination of the vehicle by receiving the detection information of the inclination detection sensor; Seat belt tension control system characterized in that it comprises a step motor for adjusting the tension of the seat belt in accordance with the signal of the control unit. The tilt sensor of claim 1, A fixed first member; A second member moving according to the inclination of the vehicle; And And a sensing means installed on the first member or the second member to sense a distance between the first member and the second member. The method of claim 2, wherein in the inclination detection sensor, The second member is rotatably coupled to the first member and rotates such that the distance between the first member and the second member becomes closer or further away according to the vehicle inclination, The sensing means is formed of a magnet installed on any one of the first member and the second member, and induction electromotive force sensing means consisting of a coil installed on the other toward the magnet, wound around the cylindrical member, And the induction electromotive force sensing means is configured to input the induction electromotive force generated as the distance from the magnet changes to the control unit. The method of claim 4, wherein The magnet is composed of an iron core and a coil wound thereon, the tension control system of the seat belt, characterized in that the coil is an alternating electromagnet receiving power through an alternator. The method of claim 3 or 4, wherein the control unit A calculation unit calculating a slope using the voltage of the induced electromotive force input from the induced electromotive force sensing means; And And a control unit configured to determine and control the driving stage of the step motor by comparing the inclination input from the operation unit with predetermined data. In the inclination detection sensor for detecting the inclination of the vehicle, A fixed first member, A second member rotatably coupled to the first member, the second member rotating according to the inclination of the vehicle so that the distance from the first member is closer or further away from the first member; A magnet installed on one of the first member and the second member; And And an induction electromotive force sensing means formed of a coil wound around the magnet on the other of the first member and the second member. The method of claim 6, The magnet is composed of an iron core and a coil wound thereon, the tension control system of the seat belt, characterized in that the coil is an alternating electromagnet receiving power through an alternator.