KR20060024032A - Passenger sensing system for vehicle - Google Patents

Abstract

The present invention relates to a vehicle occupancy sensing system, and more particularly, by mounting a membrane switch and a ball in a bowl-shaped container, which is determined by the behavior of the ball depending on the attitude of the passenger. The present invention relates to a vehicle occupancy detection system that detects a signal from a position and recognizes a pattern according to a passenger's attitude to improve not only the passenger's posture but also the sensitivity of the passenger's out of position (OOP).

To this end, the present invention is a vehicle occupancy detection system installed in the seat cushion, a plurality of compartment sensors disposed at equal intervals inside the seat cushion for detecting the pattern according to the attitude of the passenger; It provides a vehicle occupancy sensing system including an airbag ECU for receiving the signal of the compartment sensor to control the operation of the airbag.

Seat Cushion, Block Sensor, Membrane Switch, Ball, Airbag ECU, Child Seat

Description

Passenger sensing system for vehicle             

1 is a plan view showing a car occupant detection system according to the present invention.

Figure 2 is a side view showing a car occupant detection system according to the present invention.

3 is a partially enlarged view of 'A' of FIG.

4 is an enlarged partial view of 'B' of FIG.

5 is a schematic diagram illustrating the membrane switch of FIG. 4.

Figure 6 is an operating state of the vehicle occupancy detection system according to the present invention.

7 is an operating state when the child seat (Child Seat) is applied to the vehicle occupancy detection system according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: seat cushion 3: seat back

10: segment sensor 12: first track

14 second track 16 compartment

20: membrane switch 22: cover

24: first contact tape 26: upper circumference

28: Sphere 30: Ball                 

32: lower circuit 34: second contact tape

36: partition 38: plate

40: airbag 42: child seat

The present invention relates to a vehicle occupancy sensing system, and more particularly, by mounting a membrane switch and a ball in a bowl-shaped container, which is determined by the behavior of the ball depending on the attitude of the passenger. The present invention relates to a vehicle occupancy detection system that detects a signal from a position and recognizes a pattern according to a passenger's attitude to improve not only the passenger's posture but also the sensitivity of the passenger's out of position (OOP).

In general, various safety devices such as seat belts and airbags are installed in a vehicle to prevent the passenger from being injured in front of the vehicle in case of a collision.

In particular, the airbag device is an expensive safety device provided by installing an airbag and an operating device on a steering wheel or a crash pad. The airbag is cushioned on the passenger's chest as the airbag is deployed at the same time as the collision detection sensor mounted on the front bumper is sensed. By providing this, it is possible to prevent the passenger from being thrown forward or hitting the steering wheel and being injured.

However, the conventional airbag system is inflated / deployed toward the face and chest of the front driver by the airbag sensor when the vehicle crashes, and thus cushions the driver's face, so that the vehicle has a constant impact regardless of the presence or absence of the passenger and the posture of the passenger. When applied, the airbag is deployed.

Conventional techniques that are used as a way to compensate for the disadvantages of such an airbag system include OCS (Occupant Classification System), WCS (Weight Classification System) and Passive Occupant Detective System (PODS).

The OCS is a system for determining the presence or absence of passengers by the pressed shape of the Force Sensing Resister (FSR) sensor according to the shape of the passenger load, and the WCS is a system for detecting and measuring the resistance value of the strain guage due to the load. In addition, the PODS is a system for detecting a change in pressure through the bladder.

As shown in the left figure of FIG. 6, the situation such as (a) and (c) has no problem even when the airbag 40 is deployed at a normal pressure. Injury may be required, and the airbag ECU must be commanded to lower the deployment pressure or to not deploy.

However, the conventional method of recognizing the load pattern and the method of recognizing the weight has a problem that it is difficult to determine the situation. This is because the load patterns in each case appear similar.

On the other hand, as shown in Figure 7, the airbag is incorrectly deployed due to the determination and error that can occur when mounting the child seat on the seat may be injured children.

In this case, the OCS can accurately classify the child seat, but when using the auxiliary material in the child seat is difficult to accurately measure, the WCS has a disadvantage that does not properly distinguish a relatively simple system or child seat.

In addition, the PODS has a disadvantage in that it is temperature sensitive and the division of the child seat is unclear.

The present invention has been made in view of the above-mentioned, a plurality of compartment sensors are arranged at equal intervals inside the seat cushion, and a membrane switch and a ball are installed inside the compartment sensor, each compartment in the airbag ECU By detecting which section the current is applied from the sensor and recognizing the pattern according to the passenger's posture, it is possible to prevent the safety accident of the passenger by controlling the deployment pressure and operation of the airbag, and not only the posture of the passenger but also the OOP of the passenger. The object of the present invention is to provide a vehicle occupancy detection system capable of improving the sensitivity of the vehicle.

According to an aspect of the present invention, there is provided a car occupancy sensing system installed in a seat cushion, including: a plurality of compartment sensors arranged at equal intervals inside the seat cushion to sense a pattern according to a passenger's posture; It characterized in that it comprises an airbag ECU for controlling the operation of the airbag by receiving the signal of the compartment sensor.

In a preferred embodiment, the compartment sensor comprises: first and second tracks partitioned inward and outward in a concentric manner on an upper surface thereof; A plurality of partitions in which the first and second tracks are repartitioned at equal intervals in the radial direction; A plurality of membrane switches each installed in the plurality of compartments; And a ball provided to move in an outer diameter direction from the center of the partition to be in contact with the membrane switch.

In a more preferred embodiment, there is provided a plate mounted on top of the compartment sensor to transmit the passenger's behavior well; The first and second tracks are characterized in that it further comprises a plurality of partitions formed at equal intervals in the radial direction.

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

1 to 4 are apparatus configuration diagrams illustrating a vehicle occupancy sensing system according to the present invention, and FIG. 5 is a schematic diagram illustrating the membrane switch of FIG. 4.

According to the present invention, a plurality of compartment sensors 10 are arranged at equal intervals inside the seat cushion 1, and a membrane switch 20 and a ball 30 are installed in the compartment sensor 10, thereby providing an airbag ECU. In each compartment sensor 10 to detect the current is applied in which compartment from the compartment and the pattern according to the passenger's posture, by controlling the deployment pressure and the presence of the airbag can prevent the safety accident of the passenger, The focus is on improving posture as well as the passenger's sensitivity to OOP.

The present invention is installed in the seat cushion (1), a plurality of compartment sensors 10 for detecting a pattern according to the posture of the passenger, and receives the detection signal of the compartment sensor 10 of the air bag 40 It consists of an airbag ECU that controls the operation.

In more detail, the plurality of compartment sensors 10 are disposed at equal intervals in the seat cushion 1, and a membrane switch 20 and a ball 30 are installed therein.

The compartment sensor 10 is a bowl shape formed convexly in a downward direction, the upper surface of which is partitioned into a first track 12 and a second track 14 on the inner side of the concentric circle. In this case, the first track 12 and the second track 14 are composed of a plurality of partitions 16 repartitioned at equal intervals in the radial direction.

For example, if the first and second tracks 12 and 14 are divided into eight equal parts, the partition 16 is made up of sixteen in total. Here, a membrane switch 20 is attached to the partition 16. At this time, the membrane switch 20 serves to divide the partition.

The membrane switch 20 is, as is well known, from the top, a cover 22, a first adhesive tape 24, a top circuit 26, a spacer 28, The lower circuit 32 (bottom circuit), the second adhesive tape 34 (adhesive tape) is stacked in order in close contact.

In this case, the membrane switch 20 is connected to a power source such as a battery.

More specifically, the cover 22 covers the membrane switch 20, the first adhesive tape 24 maintains the close contact of the membrane switch 20, the upper circuit 26 is the lower circuit The current flows when a contact is made with (32).

The spacer 28 maintains a gap between the upper and lower circuits 26 and 32 at about 1 to 1.5 mm, and the lower circuit 32 has a current when a contact is made with the upper circuit 26. Flows, and the second adhesive tape 34 maintains close contact between the compartment sensor 10 and the membrane switch 20.

A spherical ball 30 having a predetermined size is provided at the center of the compartment sensor 10, and a plurality of partitions 36 are radially disposed between the compartment 16 and the compartment 16 of the compartment sensor 10. Is formed. At this time, the plate 38 is installed on the upper portion of the plurality of compartment sensors 10.

In addition to the membrane switch 20, any type of switch may be applied as long as the current is applied by the ball 30 to transmit an electrical signal.

In addition, the plate 38 is made of a stretchable material so that the force is well transmitted to the compartment sensor 10 according to the passenger's behavior.

Referring to the operating state of the vehicle occupancy detection system according to the present invention by such a configuration as follows.

6 is an operation state diagram of the vehicle occupancy detection system according to the present invention, Figure 7 is an operation state diagram when the child seat (Child Seat) is applied to the vehicle occupancy detection system according to the present invention.

Passengers may take various positions, such as taking a comfortable position while moving or changing their seating positions during sleep and rest.

For example, (a) of FIG. 6 is a case where the passenger sits back with the seat back 3 at a predetermined angle, and the center of gravity of the passenger is tilted rearward (based on the longitudinal direction of the vehicle body), so that the contact portion of the seat cushion 1 is located. Is pushed forward.                     

At the same time, since a plurality of compartment sensors 10 are installed below the contact portion, the ball 30 of the compartment sensor 10 is moved forward in accordance with the direction of the force received by the contact portion.

At this time, when the passenger moves the center of gravity to the left (or right), the ball 30 of the first, fourth and seventh section sensor 10 (or the third, sixth, and nineth section sensor 10). Will move to the right (or left).

The first track 12 may move from the first track 12 to the second track 14 depending on the magnitude of the force applied to the contact portion.

In this manner, (b) of FIG. 6 is a case in which the passenger leans forward, and the center of gravity of the passenger is moved forward, so that the ball 30 of the compartment sensor 10 moves opposite to the above (a). .

At this time, when the center of gravity of the passenger moves to the right or left, the movement of the ball 30 of the compartment sensor 10 is as described above.

In addition, (c) of FIG. 6, since the center of gravity of the passenger is at the center of the seat cushion 1, the ball 30 of the compartment sensor 10 is also located at the center.

When the ball 30 of the compartment sensor 10 moves to any one of the plurality of compartments 16 to pressurize the membrane switch 20 according to the passenger's behavior, the upper circuit 26 and the lower circuit ( 32 is in contact with the current is applied, so that each compartment sensor 10 consisting of a plurality of compartments 16 detects the movement position of the ball (30).

Here, in the case of (a) and (c), there is no problem even when the airbag 40 is deployed at a normal pressure, but in the case of (b), the pressure may be injured when the airbag 40 is deployed. You need to give it a command to avoid lowering it or deploying it.

Therefore, the airbag ECU receives the detection signal of each compartment sensor 10 according to the movement position of the ball 30, recognizes the pattern of the seating position of the passenger and sends a deployment signal to the operating part of the airbag 40. do.

On the other hand, when the child seat 42 is mounted on the seat cushion 1, as shown in Figure 7, the general child seat 42 is recognized as a 'H' shaped pattern. This is a pattern that is difficult to get out of a passenger's seating position.

Therefore, when the 'H' shaped pattern as described above is pre-mapped to recognize that the child seat 42 is mounted, it is possible to prevent misunderstandings that may occur when the seat is mounted, and to prevent child injury due to the opening of the airbag 40. You can stop it.

Of course, the 'I'-shaped child seat 42 is also applicable.

As described above, according to the vehicle occupancy detection system according to the present invention, a plurality of compartment sensors are arranged in the seat cushion at equal intervals, and each of the membrane switch installed in each compartment in the compartment sensor and in the center of the compartment sensor Including the built-in ball, it is possible to recognize the overall pattern of the passenger's seating position by knowing which compartment is applied from all compartment sensors according to the passenger's behavior.

In addition, it is possible to accurately operate a safety device such as an airbag in the event of a vehicle crash by accurately predicting a posture of a passenger seated on a seat by receiving a detection signal from the compartment sensor.

Claims (3)

In the car occupancy detection system installed inside the seat cushion, A plurality of compartment sensors arranged at equal intervals inside the seat cushion to sense a pattern according to a passenger's posture; And an airbag ECU configured to control the operation of the airbag by receiving a signal from the compartment sensor. The system of claim 1, wherein the compartment sensor comprises: first and second tracks partitioned inwardly and outwardly in a concentric manner on an upper surface thereof; A plurality of partitions in which the first and second tracks are repartitioned at equal intervals in the radial direction; A plurality of membrane switches each installed in the plurality of compartments; And a ball provided to move in an outer diameter direction from the center of the partition to be in contact with the membrane switch. A plate according to claim 1, further comprising: a plate mounted on an upper portion of the compartment sensor to transmit a passenger's behavior well; The first and second tracks further comprises a plurality of partitions formed at equal intervals in the radial direction, the vehicle occupancy detection system.

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