KR20120129114A - A apparatus for sensing passenger - Google Patents

A apparatus for sensing passenger Download PDF

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Publication number
KR20120129114A
KR20120129114A KR1020110047173A KR20110047173A KR20120129114A KR 20120129114 A KR20120129114 A KR 20120129114A KR 1020110047173 A KR1020110047173 A KR 1020110047173A KR 20110047173 A KR20110047173 A KR 20110047173A KR 20120129114 A KR20120129114 A KR 20120129114A
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KR
South Korea
Prior art keywords
line
passenger
voltage
wire
seat
Prior art date
Application number
KR1020110047173A
Other languages
Korean (ko)
Inventor
박유태
Original Assignee
현대모비스 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 현대모비스 주식회사 filed Critical 현대모비스 주식회사
Priority to KR1020110047173A priority Critical patent/KR20120129114A/en
Publication of KR20120129114A publication Critical patent/KR20120129114A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/002—Seats provided with an occupancy detection means mounted therein or thereon
    • 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
    • B60R21/015—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 the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
    • B60R21/01512—Passenger detection systems

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Seats For Vehicles (AREA)

Abstract

PURPOSE: A passenger sensing device is provided to confirm the abnormal state of a first or second wire according to the time that voltage output from a second wire reaches reference voltage. CONSTITUTION: A passenger sensing device comprises a first wire(12), a second wire(14), and a control unit. The firs wire is placed in a seat. The second wire is separately placed from the first wire in the seat. The second wire forms a capacitor with the first wire. The control unit determines the abnormal state of the first or second wire on the basis of the time constant that voltage output from a second wire reaches reference voltage after supplying diagnosis voltage to the first wire.

Description

Passenger detection device {A APPARATUS FOR SENSING PASSENGER}

The present invention relates to a passenger detection device, and more particularly to a passenger detection device for identifying the presence of passengers on the seat.

In general, a vehicle is provided with various safety devices for the safety of passengers, and may include a seat belt which is a device that restrains the passenger to the seat during an accident.

The passenger sitting on the seat must wear a seat belt for safety. Recently, a vehicle is equipped with a passenger detection device that warns the passenger when the passenger does not wear the seat belt after sitting on the seat.

The passenger detecting device is arranged in a seat to detect a passenger's seating and the passenger detection sensor, and receives the signal of the passenger sensor to determine whether the passenger seated on the seat, the seat belt when the passenger is seated on the seat It includes a body control module (BCM) that activates a warning light and an alarm sound to wear.

The passenger sensor is operated by a switch method in which the two wires are attached to each other by being pressed by the load of the passenger, and according to the law, the female body is pressurized by a small 5% female. Therefore, since the two wires are formed in a thin film so that the passenger sensor can be easily pressed against the 5% female, the two wires may be broken or broken.

The problem to be solved by the present invention is to provide a passenger detection device that can determine whether the passenger sensor installed in the seat failure.

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, the passenger detecting device according to an embodiment of the present invention, the first line disposed in the seat, and the first line is disposed in the seat spaced apart from the first line to form a capacitor (capacitor) together with the first line At least one of the first line and the second line based on a time constant at which an output voltage output from the second line reaches a set reference voltage after supplying a diagnostic voltage to the second line and the first line; It includes a control unit for determining whether or not abnormality.

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

The passenger sensing device according to the present invention, after supplying the diagnostic voltage to the first line, according to the time constant (time) until the voltage output from the second line reaches the reference voltage, the first line and the second line There is an effect that can determine whether at least one of the abnormalities.

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

1 is a view showing a passenger detection device according to an embodiment of the present invention,
2 is a plan view of the passenger sensor shown in FIG.
3 is a cross-sectional view taken along line AA of FIG. 2 when the seat is vacant, and a circuit diagram of the passenger sensing device according to it;
4 is a cross-sectional view taken along the line AA of FIG. 2 when a passenger is seated on the seat, and a circuit diagram of the passenger sensing device according to it;
5 is a graph illustrating a voltage input to a first line and a voltage output from a second line;
6 is a graph showing a time constant until the voltage output from the second line reaches the reference voltage;
7 is a flowchart showing an operation algorithm of the passenger sensing apparatus according to the embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by 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 being 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 concept of the invention to those skilled in the art. Is provided to fully convey 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.

Hereinafter, the present invention will be described with reference to the drawings for describing a passenger sensing device according to an embodiment of the present invention.

1 is a view showing a passenger detection apparatus according to an embodiment of the present invention.

Referring to FIG. 1, a passenger detecting device according to an embodiment of the present invention is connected to a passenger detecting sensor 100 disposed in a seat 2 and a passenger detecting sensor 100, and seating of a passenger on the seat 2. It includes a control unit (BCM; Body Control Module, 4) for determining whether or not.

The seat 2 comprises a seat cushion 3 for supporting the passenger's hip and a seat bag 5 for supporting the passenger's back. The passenger sensor 100 may be installed in the seat cushion 3 or may be installed in the seat back 5, but the exemplary embodiment is illustrated as being installed in the seat cushion 3.

Passenger detection sensor 100 is installed in the seat 2, the switch is activated when the seat cushion 3 is pressed by the load of the passenger sitting on the seat 2 to detect the presence of passengers seated on the seat (2) .

The controller 4 supplies a predetermined voltage to the passenger sensor 100, and then determines whether the passenger is seated on the seat 2 according to whether the output voltage falls. That is, when the passenger detection sensor 100 is switched on (ON) by the load of the passenger sitting on the seat 2, the line resistance of the passenger detection sensor 100 is increased to generate a drop in the output voltage. When the voltage output from the sensor 100 drops, the controller 4 may determine that the passenger is seated in the seat 2. A detailed description thereof will be described later.

Of course, the controller 4 controls to activate a warning sound and / or a warning light informing the passenger to wear the seat belt 6 if the seat belt 6 is not worn when the passenger is sitting on the seat 2. .

FIG. 2 is a plan view of the passenger sensor shown in FIG. 1, FIG. 3 is a sectional view taken along the line AA of FIG. 2 when the seat is vacant, and a circuit diagram of the passenger sensor according to it. FIG. 2 is a sectional view taken along line AA of FIG. 2, and a circuit diagram of the passenger sensing device according to the same.

2 to 4, the passenger detection sensor 100 is provided with a plurality of switches 10 that switch by the load of the passenger sitting on the seat 2. As the plurality of switches 10 are turned on / off by the load of the passenger sitting on the seat 2, the passenger sensor 100 outputs a different voltage.

In detail, the passenger sensor 100 may include a first line 20 and a second film 30 spaced apart from each other in the seat 2, and a first line that is a conductive member disposed on the first film 20. (12) and the second line 14, which is a conductive member disposed to face the first line 12 on the second film 30, and the first line 12 and the second line 14 to adhere to each other. An adhesive member 40 is included. In this embodiment, the first film 20 and the second film 30 are each made of polyethylene terephthalate (PET), and the adhesive member 40 is a double-sided tape.

The adhesive member 40 bonds the first line 12 and the second line 14 to form a space S spaced apart between the first line 12 and the second line 14. The switch 10 is bonded to the first wire 12 and the second wire 14 so as to be formed.

The first wire 12 may include a first silver part 12a made of silver, which is printed and disposed on the first film 20, and a first silver part 12a to prevent oxidation of the first silver part 12a. It includes a first carbon portion 12b of the carbon material is printed and disposed on.

The second line 14 is formed in the same structure as the first line 12. That is, the second wire 14 may include a second silver part 14a made of silver, which is printed and disposed on the second film 30, and a second silver part 14 to prevent oxidation of the second silver part 14a. And a second carbon portion 14b made of carbon material which is printed and disposed on the portion 14a).

The bonding member 40 bonds the first carbon portion 12b and the second carbon portion 14b so that the space S is formed, and the sheet 2 is pressed by the load of the passenger sitting on the sheet 2. At this time, while the first film 20 and the second film 30 are pressed and bent, the first line 12 and the second line 14 are brought into contact with each other in the space S so that the switch 10 is turned on. To be.

The first line 12 is connected to an analog input terminal (not shown) of the controller 4 and receives a diagnostic voltage from the controller 4. In addition, the second line 14 is connected to an analog output terminal (not shown) of the controller 4, and the voltage output from the second line 14 is transmitted to the controller 4.

Referring to FIG. 3, when the seat 2 is a vacancy, the passenger sensor 100 may have switches 10 formed by the first line 12 and the second line 14 as shown in FIG. You are away. The passenger sensing device at this time may be represented by a circuit as shown in FIG. That is, the switch 10 performs the function of a capacitor.

Referring to FIG. 4, when a passenger is seated on the seat 2, the switches 10 formed by the first line 12 and the second line 14 are attached to each other as shown in FIG. 4 (a). The passenger sensing device at this time may be represented by a circuit as shown in FIG. That is, the switch 10 may be represented by a resistance, and the line resistance is increased in the circuit, so that the voltage output from the second line 14 drops and is transmitted to the controller 4.

In this way, when the voltage output from the second line 14 drops, the controller 4 can determine that the passenger is seated in the seat 2. With reference to Figure 5 will be described in detail below.

5 is a graph illustrating voltages input to the first line and voltages output from the second line.

Referring to FIG. 5, the controller 4 supplies a diagnostic voltage of a square pulse as shown in (a) to the first line 12. If the seat 2 is vacant without being seated, the voltage output from the second line 14 is increased due to the charging voltage of the switch 10, that is, the capacitor, as shown in (b). In addition, if a passenger is seated on the seat 2, the switch 10 acts as a resistance and the voltage output from the second line 14 drops.

If at least one of the first line 12 and the second line 14 is disconnected, the voltage output from the second line 14 is zero volts. Therefore, when the voltage output from the second line 14 is 0 volts, the controller 4 may determine that at least one of the first line 12 and the second line 14 is disconnected.

6 is a graph showing a time constant until the voltage output from the second line reaches the reference voltage.

By the way, when one of the first wire 12 and the second wire 14 is not completely disconnected and damaged, the wire resistance value increases, which causes the time constant value to increase.

That is, as shown in FIG. 6, when both the first line 12 and the second line 14 are in a normal state, when the control unit 4 inputs the diagnostic voltage of the square pulse into the first line 12. The time constant until the voltage output from the second line 14 reaches the reference voltage becomes T, but if at least one of the first line 12 and the second line 14 is damaged, the controller 4 When A) inputs the diagnostic voltage of the square pulse to the first line 12, the time constant until the voltage output from the second line 14 reaches the reference voltage becomes T '.

Therefore, when the time constant until the voltage output from the second line 14 reaches the set reference voltage is increased, at least one of the first line 12 and the second line 14 is damaged. You can judge that you are wearing.

7 is a flowchart showing an operation algorithm of the passenger sensing apparatus according to the embodiment of the present invention.

Referring to Figure 7, look at the operation of the passenger detection device according to an embodiment of the present invention.

First, the controller 4 applies the diagnostic voltage of the square pulse to the first line 12 (S10).

Thereafter, the controller 4 measures the output voltage output from the second line 14 and the time constant until the output voltage reaches the reference voltage (S20). Here, when the output voltage output from the second line 14 is 0 volts, the controller 4 may determine that at least one of the first line 12 and the second line 14 is disconnected.

Thereafter, the controller 4 determines whether the passenger is seated on the seat 2 according to the drop of the output voltage output from the second line 14 (S30). Here, the controller 4 may determine that the passenger is seated in the seat 2 when the output voltage output from the second line 14 drops.

In addition, the controller 4 compares the time constant with a set reference time constant (S40).

Thereafter, when the time constant is greater than the reference time constant, the controller 4 determines that at least one of the first line 12 and the second line 14 is damaged rather than disconnected (S50). In addition, when the time constant is equal to or less than the reference time constant, the controller 4 determines that the first line 12 and the second line 14 are both normal (S55).

As described above, the passenger sensing device according to the present invention, after supplying the diagnostic voltage to the first line 12, the time constant (time) until the voltage output from the second line 14 reaches the reference voltage Accordingly, by checking whether at least one of the first line 12 and the second line 14 is damaged, it is possible to diagnose whether the passenger sensor 100 is broken.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalents thereof are included in the scope of the present invention Should be interpreted.

2: sheet 4: control unit
10: switch = capacitor 12: first wire
12a: first silver portion 12b: first carbon portion
14 second line 14a: second silver portion
14b: second carbon part 20: first film
30: second film 40: adhesive member
100: passenger detection sensor S: separation space

Claims (13)

A first line disposed within the sheet;
A second line disposed in the sheet and spaced apart from the first line to form a capacitor together with the first line; And
After supplying a diagnostic voltage to the first line, at least one of the first and second lines is determined based on a time constant at which the output voltage output from the second line reaches a set reference voltage. Passenger detection device comprising a. The method according to claim 1,
Passenger sensing device further comprises a first film, the first line is disposed, and the second film is disposed so that the second line is facing the first line. The method according to claim 1,
Passenger detection device further comprises an adhesive member for bonding the first line and the second line. The method according to claim 3,
The adhesive member is a passenger sensing device to bond the first line and the second line so that the space is formed between the first line and the second line to form the capacitor. The method according to claim 1,
And the controller is configured to determine whether a passenger is seated on the seat according to a drop in the output voltage. The method according to claim 1,
And the controller determines that at least one of the first and second lines is disconnected when the output voltage is 0 volts. The method according to claim 1,
And the controller determines that at least one of the first line and the second line is damaged when the time constant is greater than a set reference time constant. The method according to claim 1,
And the controller determines that the first line and the second line are normal when the time constant is equal to or less than a set reference time constant. The method according to claim 1,
The diagnosis voltage is a passenger sensing device of a voltage of a square pulse. The method according to claim 2,
The first line includes a first silver part of a silver material disposed on the first film, and a first carbon part of a carbon material disposed on the first silver part to prevent oxidation of the first silver part. Device. The method according to claim 2,
The second wire may include a second silver part of a silver material disposed on the second film, and a second carbon part of a carbon material disposed on the second silver part to prevent oxidation of the second silver part. Device. The method according to claim 2,
The first film and the second film is a passenger sensing device each made of polyethylene terephthalate (PET) material. The method according to claim 3,
The adhesive member is a double-sided tape passenger detection device.
KR1020110047173A 2011-05-19 2011-05-19 A apparatus for sensing passenger KR20120129114A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110047173A KR20120129114A (en) 2011-05-19 2011-05-19 A apparatus for sensing passenger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110047173A KR20120129114A (en) 2011-05-19 2011-05-19 A apparatus for sensing passenger

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KR20120129114A true KR20120129114A (en) 2012-11-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103264674A (en) * 2013-05-23 2013-08-28 廊坊市金色时光科技发展有限公司 Seat passenger occupation sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103264674A (en) * 2013-05-23 2013-08-28 廊坊市金色时光科技发展有限公司 Seat passenger occupation sensor

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