KR20120037767A - Apparatus for classifying occupant of an automobile - Google Patents

Apparatus for classifying occupant of an automobile Download PDF

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Publication number
KR20120037767A
KR20120037767A KR1020100099424A KR20100099424A KR20120037767A KR 20120037767 A KR20120037767 A KR 20120037767A KR 1020100099424 A KR1020100099424 A KR 1020100099424A KR 20100099424 A KR20100099424 A KR 20100099424A KR 20120037767 A KR20120037767 A KR 20120037767A
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South Korea
Prior art keywords
electrode
electric field
unit
change
passenger
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KR1020100099424A
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Korean (ko)
Inventor
이성훈
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현대모비스 주식회사
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Priority to KR1020100099424A priority Critical patent/KR20120037767A/en
Publication of KR20120037767A publication Critical patent/KR20120037767A/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
    • B60N2/90—Details or parts not otherwise provided for
    • 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
    • B60R21/0153—Passenger detection systems using field detection presence sensors
    • B60R21/01534—Passenger detection systems using field detection presence sensors using electromagneticwaves, e.g. infrared
    • 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
    • B60R21/01556—Child-seat detection systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
    • B60W40/08—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to drivers or passengers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Mathematical Physics (AREA)
  • Electromagnetism (AREA)
  • Seats For Vehicles (AREA)

Abstract

The present invention provides a passenger classification apparatus capable of distinguishing a plurality of passengers.
To this end, the passenger classification apparatus according to the embodiment of the present invention, the first electrode, the second electrode for forming a first electric field between the first electrode and the first electrode to which the first object occupying the sheet, and The first object is distinguished by using a third electrode which forms a second electric field between the first electrode and a second electric field to which the second object occupying the sheet is exposed, and a value output according to the change of the first electric field. And a control device that distinguishes the second object using a value output according to the change of the second electric field.

Description

Apparatus for classifying occupant of an automobile}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passenger classification apparatus, and more particularly, to a passenger classification apparatus that classifies an object occupying a seat by using a capacitance.

In general, a vehicle is provided with various safety devices for the safety of the passenger, and one of them includes an airbag that inflate between the vehicle structure and the passenger during a car collision to protect the passenger.

These airbags are deployed during a car crash to protect passengers, but there is no problem for adults, but infants are likely to act as a life-threatening hazard.

Therefore, in each country, there are regulations for the actual safety evaluation of passengers in the rear seats according to the deployment of airbags.In order to satisfy these regulations, passengers are installed in the rear seats to classify passengers seated in the seats as infants or adults. Thus, the deployment and deployment conditions of the airbag are different.

It is an object of the present invention to provide a passenger classification apparatus capable of distinguishing a plurality of passengers.

The passenger classification apparatus according to the embodiment of the present invention for solving the above problems, the second electrode to form a first electric field between the first electrode and the first object to which the first object occupying the sheet between the first electrode. The first electrode by using an electrode, a third electrode forming a second electric field to which the second object occupying the sheet is exposed between the first electrode, and a value output according to the change of the first electric field; And a control device for classifying objects and classifying the second objects using values output according to the change of the second electric field.

Passenger separator according to the present invention, electrically connecting the first electrode, the second electrode and the third electrode with one control device, occupies the sheet in the first electric field formed between the first electrode and the second electrode. The first object to be exposed is exposed, and the second object occupying the sheet is exposed to a second electric field formed between the first electrode and the third electrode, so that a value outputted according to the change of the first electric field is determined. The control device distinguishes the first object by using the control device, and the control device distinguishes the second object by using a value output according to the change of the second electric field, so that a plurality of passengers can sit on the seat ( For example, when the passenger classification apparatus according to the present invention is applied to a rear seat of a passenger car, there is an effect of distinguishing a plurality of passengers.

1 is a side view showing the main part of the passenger classification apparatus according to an embodiment of the present invention;
2 is a plan view showing a first electrode, a second electrode and a third electrode of the passenger classification apparatus according to the embodiment of the present invention;
3 is a detailed configuration diagram of a passenger classification apparatus according to an embodiment of the present invention;
4 is a control block diagram of a passenger classification device according to an embodiment of the present invention.

With reference to the accompanying drawings, a vehicle according to an embodiment of the present invention will be described in detail.

1 is a side view showing the main part of the passenger classification apparatus according to an embodiment of the present invention, Figure 2 is a plan view showing a first electrode, a second electrode and a third electrode of the passenger classification apparatus according to an embodiment of the present invention, 3 is a detailed configuration diagram of a passenger classification apparatus according to an embodiment of the present invention, Figure 4 is a passenger block classification control block diagram according to an embodiment of the present invention.

1 to 4, the passenger classification apparatus according to the embodiment of the present invention is installed in the rear seat 10. Only an adult sits in the driver's seat (not shown) during driving of the vehicle, but the rear seat 10 includes not only an adult but also an infant or a child, so that the rear seat 10 uses the passenger classification device according to the embodiment of the present invention. The object (1) occupying the vacancy (air), the adult, the infant or child by distinguishing whether the deployment of the airbag and the deployment pressure can be adjusted.

In particular, the rear seat 10 is a plurality of passengers to sit. The core technology of the present invention is to distinguish between a plurality of passengers to be seated on the rear seat 10, so that the air bag deployment and deployment pressure can be adjusted. In the present embodiment, the seat occupancy of the rear seat 10 is limited to two passengers, one of the two passengers sitting on the left side of the back seat seat 10 and the other sitting on the right side will be described. do.

The rear seat 10 includes a seat 12 supporting the hips of the passenger and a back 14 supporting the back of the passenger. The passenger separator may be installed in the seating unit 12 or may be installed in the backrest 14. Hereinafter, the rear seat 10 will be described as a seat 10, the passenger separator device is limited to being installed in the seat 12, the seat 10 means a seat 12.

Passenger separator according to an embodiment of the present invention, the first electrode 20 disposed in the center of the sheet 10, and the second electrode spaced apart from the first electrode 20 to the right of the sheet 10 30, a third electrode 40 spaced apart from the first electrode 20 and disposed on the left side of the sheet 10, the first electrode 20, the second electrode 30, and a third electrode ( And a control device 50 electrically connected with 40).

The first electrode 20, the second electrode 30, and the third electrode 40 are electrically connected to the control unit 51 disposed on the sheet 10, and the control unit 51 is the passenger identification unit 52. Is electrically connected). Here, the controller 51 and the passenger identification unit 52 may be separated from each other, or may be integrated into an ECU (Electronic Control Unit), which is a representative control device 50 of a vehicle.

The second electrode 30 is disposed on the right side of the seat 10 on which the passenger sits, the third electrode 40 is disposed on the left side of the seat 10 on which the passenger sits, and the first electrode 20 Is disposed between the second electrode 30 and the third electrode 40.

The controller 51 includes an AC power supply unit 54 for applying AC power to the first electrode 20.

The AC power supply unit 54 may be formed as one, but in the present embodiment, the AC power supply unit 54 may include a first AC power supply unit 54a for supplying AC power having different voltages to the first electrode 20. A second AC power supply unit 54b is included.

When AC power is applied from the first AC power supply unit 54a to the first electrode 20, the first electrode 20 and the second electrode 30 alternate with a positive electrode and a negative electrode. In operation, an electric field is formed between the first electrode 20 and the second electrode 30.

In addition, when AC power is applied from the second AC power supply unit 54b to the first electrode 20, the first electrode 20 and the third electrode 40 are connected to the positive electrode and the negative electrode. While operating alternately, an electric field is formed between the first electrode 20 and the third electrode 40.

Hereinafter, for the understanding of the description, an electric field formed between the first electrode 20 and the second electrode 30 is called a first electric field, and is formed between the first electrode 20 and the third electrode 40. The electric field will be described as a second electric field.

The object 1 occupying the right side of the sheet 10 is exposed to the first electric field, and the object 1 occupying the left portion of the sheet 10 is exposed to the second electric field. In FIG. 1, the object 1 occupying the sheet 10 is illustrated as an adult, but in general, the object occupying the sheet 10 is the adult and the air together. That is, when the seat 10 is a vacancy, the object which occupies the seat 10 is air. In particular, when an infant or a child sits on the seat 10, a child restraint system (CRS) is mounted on the seat 10, and then the infant or child sits on the infant protection device. The object 1 occupying 10 is the infant protection device, the infant or the child, and air together.

Since the first electrode 20, the second electrode 30, and the third electrode 40 are all disposed in the sheet 10, the sheet 10 is exposed to the first and second electric fields. Therefore, it is preferable that the information on the sheet 10 is zero-set in the control device 50. Of course, it is preferable that the information on the structure of the vehicle that can be exposed to the first electric field and the second electric field is also zero-set.

Hereinafter, the object 1 which occupies the right part of the sheet 10 is called 1st object, and the object 1 which occupies the left part of the sheet 10 is described as 2nd object.

The control device 50 classifies the first object using a value output according to the change of the first electric field, and classifies the second object using a value output according to the change of the second electric field. . Here, the value output according to the change of the first electric field and the value output according to the change of the second electric field may be any one of a current value, a dielectric constant, and a capacitance, which will be described later. That is, as can be seen in the following [Equation 1] and [Equation 2], the current value, the dielectric constant and the capacitance are correlated.

The controller 50 measures a value output according to the change of the first electric field, and the controller 51 measures a value output according to the change of the second electric field, and the first measured by the controller 51. 1 Passenger identification for classifying the first object using a value output according to the change of the electric field, and classifying the second object using the value output according to the change of the second electric field measured by the controller 51. The determination unit 52 is included.

The controller 51 includes a current measuring unit 56 that measures a first current value according to the change of the first electric field, and measures a second current value according to the change of the second electric field.

The passenger identification unit 52 classifies the first object according to the first current value measured by the current measuring unit 56 and the second current value according to the second current value measured by the current measuring unit 56. 2 We distinguish object.

The current measuring unit 56 includes a first current measuring unit 56a for measuring the first current value, and a second current measuring unit 56b for measuring the second current value.

In addition, the controller 51 filters the data allocated to the first electrode 20, filters the data assigned to the second electrode 30, and sends the filtering unit 58 to the current measuring unit 56. It includes more.

The filtering unit 58 includes a first filtering unit 58a provided at the receiving end of the second electrode 30 and a second filtering unit 58b provided at the receiving end of the third electrode 40.

The first filtering unit 58a filters only data allocated to the second electrode 30 according to the change of the first electric field, and sends the filtered data to the first current measuring unit 56a. 1 The first current value is measured using the data filtered by the filtering unit 58a.

In addition, the second filtering unit 58b filters only the data allocated to the third electrode 40 according to the change of the second electric field and sends the filtered data to the second current measuring unit 56b, and the second current measuring unit 56b. Measures the second current value using the data filtered by the second filtering unit 58b.

Meanwhile, the first current value varies according to the change in the first electric field, and the second current value varies in accordance with the change in the second electric field. That is, the first current value has different values according to the permittivity of the first object exposed to the first electric field, and the second current according to the permittivity of the second object exposed to the second electric field. Current values have different values.

Typically, the dielectric constant of air is about 1, the dielectric constant of water is 80, the dielectric constant of moisture (gas) is 1, the dielectric constant of ice is 100, and the dielectric constant of plastics is 2 to 3, each having a different value. Therefore, as can be seen in Equation 1 below, the capacitance C between the first electrode 20 and the second electrode 30 according to the dielectric constant of the first object exposed to the first electric field is The capacitance C between the first electrode 20 and the third electrode 40 also varies according to the dielectric constant of the second object exposed to the second electric field.

[Equation 1]

Figure pat00001

In Equation 1, C: capacitance between the first electrode 20 and the second electrode 30 or capacitance between the first electrode 20 and the third electrode 40,

Figure pat00002
: Dielectric constant of object between first electrode 20 and second electrode 30 or dielectric constant of object between first electrode 20 and third electrode 40, A: first electrode 20 and second The sum of the areas of the electrodes 30 or the sum of the areas of the first electrode 20 and the third electrode 40, d: the distance between the first electrode 20 and the second electrode 30 or the first electrode ( 20) and the distance between the third electrode 40.

The passenger identification unit 52 receives the first current value measured by the first current measuring unit 56a, and the first electrode 20 and the second electrode 30 through Equation 2 below. Obtaining the capacitance (C) therebetween, and receives the second current value measured by the second current measuring unit 56b through the following [Equation 2] the first electrode 20 and the third electrode 40 The capacitance C between) can be obtained.

[Equation 2]

Figure pat00003

In Equation 2, I: the first current value or the second current value, C: the capacitance between the first electrode 20 and the second electrode 30 or the first electrode 20 and the first electrode 20 The capacitance between the three electrodes 40, V: is the voltage applied from the first AC power supply 54a or the voltage applied from the second AC power supply 54b.

The passenger identification unit 52 compares the capacitance C calculated by receiving the first current value measured by the first current measurement unit 56a with the capacitance preset in the passenger identification unit 52. When the seat 10 satisfies the capacitance when the seat is vacant, the right side of the seat 10 is classified as a vacancy, and when the seat 10 satisfies the capacitance when the adult is seated, the right side of the seat 10 is satisfied. If the adult is sitting on the seat 10, the infant or child equipped with the infant protection device on the seat 10 is satisfied if the capacitance when sitting, the infant or child sitting on the right side of the seat 10 is distinguished.

In addition, the passenger identification determiner 52 receives the capacitance C calculated by receiving the second current value measured by the second current measurer 56b and the capacitance set in advance in the passenger identification determiner 52. In comparison, when the seat 10 satisfies the capacitance when the seat is vacant, the left part of the seat 10 is classified as a vacancy, and when the seat 10 satisfies the capacitance when an adult is seated, the seat 10 The adult is sitting on the left side, and when the infant or child with the infant protection device equipped with the infant protection device is seated on the seat 10, the infant or child is classified on the left side of the seat 10. .

According to the object 1 occupying the seat 10 divided as described above, the passenger identification determiner 52 does not allow the airbag to be deployed, or allows the airbag to be deployed at a deployment pressure that can protect an adult, The airbag may be deployed at deployment pressure such that the infant or child is not injured.

Meanwhile, in the present exemplary embodiment, the first electrode 20, the second electrode 30, and the third electrode 40 are all disposed in the sheet, but the first object is exposed to the first electric field. If the position where the second object can be exposed to the second electric field can be changed in various ways in the vehicle interior. However, when the first electrode 20, the second electrode 30, and the third electrode 40 are all disposed in the sheet 10, the distance between the first electrode 20 and the second electrode 30 is close. Since the distance between the first electrode 20 and the third electrode 40 is close, the intensity of the first electric field and the second electric field is increased according to Coulomb's law, so that the sensing sensitivity is improved and the sheet ( The first electric field and the second electric field limited to 10) may be used, so that the passenger classification due to scattering due to interference with electromagnetic waves generated from an audio device and a mobile phone, etc. may not be clarified. Since it can prevent that, the 1st electrode 20, the 2nd electrode 30, and the 3rd electrode 40 are all arrange | positioned in the sheet | seat 10.

Looking at the operation of the passenger classification apparatus according to an embodiment of the present invention configured as described above are as follows.

First, when AC power is applied from the first AC power supply unit 54a to the first electrode 20, the first electrode 20 and the second electrode 30 are connected to the positive electrode and the negative electrode. While operating alternately, the first electric field is formed between the first electrode 20 and the second electrode 30.

In addition, when the AC power is applied from the second AC power supply unit 54b to the first electrode 20, the first electrode 20 and the third electrode 40 may also serve as positive and negative electrodes. While alternately operating, the second electric field is formed between the first electrode 20 and the third electrode 40.

Thereafter, the first current measuring unit 56a measures the first current value according to the first electric field change, and the second current measuring unit 56b measures the second current value according to the second electric field change. Measure Subsequently, the operation will be described by taking only the first case in which both the left part and the right part of the seat 10 are vacancies, and the second case where the infant is sitting on the left part of the seat 10 and the adult is sitting on the right part. do.

[First case]

If the left part and the right part of the sheet 10 are vacancies, the first object exposed to the first electric field is air, and the second object exposed to the second electric field is also air. Accordingly, the first current value measured by the first current measurement unit 56a is a current value based on the permittivity of air, and the second current value measured by the second current measurement unit 56b also depends on the dielectric constant of air. The current value.

Thereafter, the passenger identification unit 52 calculates the capacitance C between the first electrode 20 and the second electrode 30 through Equation 2 using the first current value, The calculated capacitance C is compared with the capacitance set in the passenger identification unit 52 to determine that the first object is air, and the right part of the seat 10 is determined as a vacancy, and the airbag is deployed. Do not In addition, the capacitance C between the first electrode 20 and the third electrode 40 is calculated by using Equation 2 using the second current value, and the calculated capacitance C is obtained. It is determined that the second object is air compared with the capacitance set in the passenger identification determiner 52, so that the left part of the seat 10 is also determined as a vacancy and the airbag is not deployed.

[Second case]

When an adult sits on the right side of the sheet 10 of the sheet 10, the first object exposed to the first electric field is the adult and the air. In addition, when the infant is sitting on the left side, the second object exposed to the second electric field is the infant protection device, infant and air. Accordingly, the first current value measured by the first current measuring unit 56a is a current value based on the permittivity of the adult and the air, and the second current value measured by the second current measuring unit 56b is the infant. The current value by the permittivity of the protective device, the infant and the air.

Thereafter, the passenger identification unit 52 calculates the capacitance C between the first electrode 20 and the second electrode 30 through Equation 2 using the first current value, The calculated capacitance C is compared with the capacitance set in the passenger identification unit 52 to determine that the first object is the adult and the air, and the adult is sitting on the right side of the seat 10. And let the airbag deploy at high pressure to protect the adult. In addition, the capacitance C between the first electrode 20 and the third electrode 40 is calculated by using Equation 2 using the second current value, and the calculated capacitance C is obtained. It is determined that the second object is the infant protection device, the infant and the air by comparing the capacitance set in the passenger identification determiner 52 to determine that the infant is sitting on the left side of the seat 10, and the airbag This is to develop a low pressure to protect the infant.

As described above, in the passenger classification apparatus according to the embodiment of the present invention, the first object occupying the sheet 10 is formed in the first electric field formed between the first electrode 20 and the second electrode 30. The second object occupying the sheet 10 is exposed to the second electric field formed between the first electrode 20 and the third electrode 40 so that the second electric field is exposed according to the change of the first electric field. The passenger identification determiner 52 distinguishes the first object by using the output value, and the passenger identification determiner 52 distinguishes the second object by using the output value according to the change of the second electric field. Therefore, when the passenger classification apparatus according to the present invention is applied to a seat (eg, a rear seat of a passenger car) in which a plurality of passengers can sit, a plurality of passengers can be distinguished by one control unit (ECU) 50. .

In the above, the preferred embodiments of the present invention have been shown and described, but the present invention is not limited to the specific embodiments described above, and the present invention belongs to the present invention without departing from the gist of the present invention as claimed in the claims. Various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

1: target occupying sheet 10: sheet
12: sitting part 14: backrest part
20: first electrode 30: second electrode
40: third electrode 50: controller
51: control unit 52: passenger identification judgment
54: AC power supply 54a: first AC power supply
54b: second AC power supply unit 56: current measurement unit
56a: first current measuring unit 56b: second current measuring unit
58: filtering unit 58a: first filtering unit
58b: second filtering unit

Claims (10)

A first electrode;
A second electrode forming a first electric field between the first electrode and the first object to which the first object occupying the sheet is exposed;
A third electrode forming a second electric field between the first electrode and the second object, the second object occupying the sheet; And
And a controller configured to classify the first object using a value output according to the change of the first electric field, and to classify the second object using a value output according to the change of the second electric field. Separator. The method according to claim 1,
And the first electrode, the second electrode, and the third electrode are all disposed in the seat. The method according to claim 1,
The second electrode and the third electrode, passenger separation device is disposed opposite to each other with the first electrode therebetween. The method according to claim 1,
The control device includes:
A control unit measuring a value output according to the change of the first electric field and measuring a value output according to the change of the second electric field;
The first object is classified using a value output according to the change of the first electric field measured by the controller, and the second object is output using a value output according to the change of the second electric field measured by the controller. Passenger identification device comprising; a passenger identification device comprising a. The method of claim 4,
The control unit includes a current measuring unit measuring a first current value according to the change of the first electric field, and measuring a second current value according to the change of the second electric field,
And the passenger identification unit classifies the first object according to the first current value, and classifies the second object according to the second current value. The method according to claim 5,
The current measuring unit includes a first current measuring unit for measuring the first current value, and a second current measuring unit for measuring the second current value. The method of claim 4,
The control unit further comprises an AC power supply for applying an AC power to the first electrode. The method of claim 7,
The AC power supply unit comprises a first AC power supply for forming the first electric field, and a second AC power supply for forming the second electric field. The method according to claim 5,
The controller further comprises a filtering unit for filtering the data allocated to the first electrode, filtering the data allocated to the second electrode, and sending the filtered data to the current measuring unit. The method according to claim 9,
The filtering unit,
A first filtering unit filtering the data allocated to the first electrode and sending the filtered data to the first current measuring unit;
And a second filtering unit filtering the data allocated to the second electrode and sending the filtered data to the second current measuring unit.
KR1020100099424A 2010-10-12 2010-10-12 Apparatus for classifying occupant of an automobile KR20120037767A (en)

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