JPH10318861A - Seating detecting device - Google Patents

Seating detecting device

Info

Publication number
JPH10318861A
JPH10318861A JP9130858A JP13085897A JPH10318861A JP H10318861 A JPH10318861 A JP H10318861A JP 9130858 A JP9130858 A JP 9130858A JP 13085897 A JP13085897 A JP 13085897A JP H10318861 A JPH10318861 A JP H10318861A
Authority
JP
Japan
Prior art keywords
seated
pressure
seat
seating
sensor
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP9130858A
Other languages
Japanese (ja)
Inventor
Takafumi Kuboki
尚文 久保木
Hirokazu Takewaki
広和 武脇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Furukawa Electric Co Ltd
Original Assignee
Furukawa Electric Co Ltd
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.)
Filing date
Publication date
Application filed by Furukawa Electric Co Ltd filed Critical Furukawa Electric Co Ltd
Priority to JP9130858A priority Critical patent/JPH10318861A/en
Priority to DE19880187T priority patent/DE19880187T1/en
Priority to PCT/JP1998/000081 priority patent/WO1998030413A1/en
Priority to US09/142,694 priority patent/US6345839B1/en
Publication of JPH10318861A publication Critical patent/JPH10318861A/en
Pending legal-status Critical Current

Links

Landscapes

  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Air Bags (AREA)

Abstract

PROBLEM TO BE SOLVED: To make it possible to identify whether a seated body on a seat is a human being or an object and to identify his physical builds in case of the human being by a method wherein the seated body is identified from a change in terms of time in a pressure force detected by a pressure sensing sensor which is arranged and installed at a seat cushion part and which detects the pressure force of the seated body. SOLUTION: A device is arranged and installed at a seat cushion part 1a at a seat 1 in an automobile or the like, and it is provided with a seated-body discrimination part 3 in which the pressure force of a seated body T is detected by a pressure sensing sensor 2 and which identifies the seated body T on the basis of a change in terms of time in the pressure force. The seated-body discrimination part 3 is connected, e.g. to a triggering device 7 for an air bag 6 via a triggering control part 9, and it controls the operation of the triggering device 7 from an identification result. In addition, a measuring unit 4 which measures the pressure force detected by a pressure sensing sensor 2 and a memory 8 which stores a reference value or the like in an identifying operation are connected to the seated-body discrimination part 3. Whether the seated body T is a human being or an object is identified from a change in terms of time in the pressure force applied to the pressure sensing sensor 2, and a physical build is identified from a pressure distribution.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、自動車等の車両に
装備されるエアバック装置等各種装置を制御するために
用いられる着座検知装置に関し、特に、座席上の着座体
が人物か物体か、人物の場合にはその体格を判別できる
着座検知装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seating detection device used for controlling various devices such as an airbag device mounted on a vehicle such as an automobile. In the case of a person, the present invention relates to a seating detection device capable of determining its physique.

【0002】[0002]

【従来の技術】近年、自動車等では衝突事故から乗員を
保護するためにエアバック装置が装備されるようになっ
た。エアバック装置は、通常、インストルメントパネル
内に格納されており、衝突時の衝撃を感知すると、起爆
装置が作動して、エアバックをバルーン状に膨張させ、
乗員が前に倒れ込むのを防止するものである。
2. Description of the Related Art In recent years, airbag devices have been provided in automobiles and the like to protect occupants from collisions. The airbag device is usually stored in the instrument panel, and when the impact at the time of collision is sensed, the detonator is activated to inflate the airbag into a balloon shape.
This prevents the occupant from falling forward.

【0003】このようなエアバック装置は、運転席側だ
けでなく、助手席側にも配備されている。しかし、助手
席には常に乗員が着座しているとは限らず、乗員が着座
していないにもかかわらず、エアバック装置が作動して
しまうと、インストルメントパネルの修繕費が高くなる
場合があった。
[0003] Such an airbag device is provided not only on the driver's seat side but also on the passenger's seat side. However, occupants are not always seated in the passenger seat, and if the airbag device is activated even though the occupant is not seated, the repair cost of the instrument panel may be high. there were.

【0004】このような不具合に鑑み、助手席に乗員が
着座していない場合には、助手席用のエアバックを膨張
しないようにしたエアバック作動装置が実登第2519
546号公報に開示されている。このエアバック作動装
置は、インストルメントパネルに設けられた超音波距離
測定機を用いて乗員が助手席に着座しているかどうかを
検知することができるようにしたものである。そして、
乗員が着座しているときのみ、起爆装置の作動が許容さ
れ、衝撃が感知されると、エアバックが膨張するように
なっている。
In view of such a problem, when an occupant is not seated in the passenger seat, an airbag operating device for preventing the airbag for the passenger seat from inflating is actually used.
No. 546 discloses this. This airbag operating device is capable of detecting whether or not an occupant is sitting in a passenger seat by using an ultrasonic distance measuring device provided on an instrument panel. And
Only when the occupant is seated, the operation of the detonator is permitted, and when an impact is sensed, the airbag is inflated.

【0005】また、特開平1−160747号公報に
は、乗員が着座しているかどうかを検出する検知スイッ
チをシートの内部に設けた着座検出機構付シートが開示
されている。この技術を用いれば、助手席に乗員が着座
していない場合には、助手席用のエアバックを膨張させ
ないように制御することが可能である。
Japanese Unexamined Patent Publication No. 1-160747 discloses a seat with a seating detection mechanism in which a detection switch for detecting whether an occupant is seated is provided inside the seat. If this technique is used, it is possible to control so that the passenger airbag is not inflated when the passenger is not seated in the passenger seat.

【0006】[0006]

【発明が解決しようとする課題】最近、助手席に着座し
ていた子供がエアバックに圧迫される事故が発生し、大
きな問題となっている。これは、助手席にいる乗員の体
格等とは無関係にエアバック装置が作動してしまうため
であるが、従来の技術では、座席上の物体の有無や人の
存在の有無については判別することができるが、座席上
に着座している者の体格を判別することができないの
で、上記問題を解決することができなかった。
Recently, an accident has occurred in which a child sitting in a passenger seat is compressed by an airbag, which has become a major problem. This is because the airbag device operates regardless of the physique, etc. of the occupant in the passenger seat.However, in the conventional technology, it is necessary to determine whether there is an object on the seat or whether there is a person. However, since the physique of the person sitting on the seat cannot be determined, the above problem cannot be solved.

【0007】また、従来の技術では、座席上にあるのが
人物か物体かを判別することができないので、座席上に
荷物等の物体が置いてある場合でもエアバック装置が通
常通り作動してしまい、エアバックの取替えやインスト
ルメントパネルの修繕等の無駄な出費が生じたり、エア
バックの圧迫により物体が損傷するという問題があっ
た。
Further, in the prior art, it is not possible to determine whether a person or an object is on the seat, so that even when an object such as luggage is placed on the seat, the airbag device operates normally. As a result, there is a problem that wasteful expenses such as replacement of the airbag and repair of the instrument panel are generated, and the object is damaged by the pressure of the airbag.

【0008】本発明は、上記課題を解決するためになさ
れたものであり、座席上の着座体が人物か物体か、人物
の場合にはその体格を判別でき、エアバック装置等各種
装置を制御するために用いられる着座検知装置を提供す
ることを目的とする。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can determine whether a seated body on a seat is a person or an object, and in the case of a person, the physique, and control various devices such as an airbag device. It is an object of the present invention to provide a seating detection device used to perform a seating operation.

【0009】[0009]

【課題を解決するための手段】本発明の着座検知装置
は、少なくともシートクッション部に配設され、着座体
の押圧力を検知する感圧センサと、その感圧センサによ
って検知された押圧力の時間変動に基づいて着座体を判
別する着座体判別手段と、を有することを特徴とするも
のである。
A seating detecting device according to the present invention is provided at least in a seat cushion portion, and detects a pressing force of a seating body, and detects a pressing force detected by the pressure sensor. And a seating body discriminating means for discriminating the seating body based on the time variation.

【0010】本発明によれば、着座体判別手段が感圧セ
ンサに加えられた押圧力の時間変動に基づいて、座席上
に荷物が載せられているか、人物が着座しているか、及
び人物であればどのような体格であるかを判別すること
ができる。すなわち押圧力の時間変動がなく一定であれ
ば、着座体は物体であると判別し、時間変動が認められ
れば、何らかの姿勢変化があることになり、着座体が人
物であると判別することができる。また、例えば、感圧
センサに加えられる押圧力の範囲が広い場合には、着座
体は大柄の人物であると判別し、狭い場合には、小柄の
人物であると判別することができる。
According to the present invention, the sitting body discriminating means determines whether a load is placed on the seat, whether a person is seated, and whether the person is seated, based on the time variation of the pressing force applied to the pressure-sensitive sensor. If so, it is possible to determine what the physique is. That is, if the pressing force does not fluctuate with time and is constant, the seated body is determined to be an object, and if time fluctuation is recognized, there is some change in posture, and it can be determined that the seated body is a person. it can. Further, for example, when the range of the pressing force applied to the pressure-sensitive sensor is wide, it is possible to determine that the seated body is a large person, and when it is narrow, it is possible to determine that it is a small person.

【0011】感圧センサは、例えば、2次元マトリック
ス状に配置された複数のセンサ素子を有する。
The pressure-sensitive sensor has, for example, a plurality of sensor elements arranged in a two-dimensional matrix.

【0012】また、着座体の温度を検知するセンサを有
する場合には、そのセンサが着座体(人物)の体温を検
知できるので、着座体Tの判別をより確実に行うことが
できる。
When a sensor for detecting the temperature of the sitting body is provided, the sensor can detect the body temperature of the sitting body (person), so that the determination of the sitting body T can be performed more reliably.

【0013】[0013]

【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて詳細に説明する。図1は、本発明の着座検知
装置を概略的に示す側面図であり、図2は、本発明の着
座検知装置の感圧センサを示す平面図である。
Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view schematically showing a seating detection device of the present invention, and FIG. 2 is a plan view showing a pressure-sensitive sensor of the seating detection device of the present invention.

【0014】図1に示すように、本発明の着座検知装置
は、自動車等の座席1の少なくともシートクッション部
1aに配設され、着座体Tの押圧力を検知する感圧セン
サ2と、その感圧センサ2によって検知された押圧力の
時間変動に基づいて着座体Tを判別する着座体判別部3
と、を有する。
As shown in FIG. 1, a seating detecting device according to the present invention is provided at least in a seat cushion portion 1a of a seat 1 of an automobile or the like, and detects a pressing force of a seating body T; Seated body discriminating unit 3 for discriminating seated body T based on the time variation of the pressing force detected by pressure-sensitive sensor 2
And

【0015】感圧センサ2は、シートクッション部1a
の表生地とウレタンフォームの間に設置される。また、
図2に示すように、感圧センサ2は、一対の対向する櫛
歯形状の弾性部材2aに2次元マトリックス状に等間隔
に取り付けられた多数のセンサ素子5を有する。したが
って、シートクッション部1a上に着座した乗員の体格
又は載せられた荷物の重さ及び大きさに応じて、マトリ
ックス状に配置されたセンサ素子5に押圧力が加えられ
る。各センサ素子5は、例えば、押圧力の大きさに応じ
て抵抗値が変化する材料が用いられており、その抵抗値
の変化を計測して押圧力を検知するものである。
The pressure sensor 2 includes a seat cushion 1a.
It is installed between the surface cloth and urethane foam. Also,
As shown in FIG. 2, the pressure-sensitive sensor 2 has a large number of sensor elements 5 attached at equal intervals to a pair of opposed comb-shaped elastic members 2a in a two-dimensional matrix. Therefore, a pressing force is applied to the sensor elements 5 arranged in a matrix according to the physique of the occupant sitting on the seat cushion portion 1a or the weight and size of the loaded luggage. For example, each sensor element 5 is made of a material whose resistance value changes according to the magnitude of the pressing force, and detects the pressing force by measuring the change in the resistance value.

【0016】着座体判別部3は、例えば起爆制御部9を
介してエアバック6の起爆装置7に接続されており、判
別結果に基づいて起爆装置7の作動を制御する。また、
着座体判別部3には、感圧センサ2によって検知された
押圧力を測定する測定ユニット4と、判別する際の基準
となる基準値等を記憶するメモリ8とが接続されてい
る。
The sitting body discriminating section 3 is connected to the detonating device 7 of the airbag 6 via, for example, a detonating control section 9 and controls the operation of the detonating device 7 based on the discrimination result. Also,
A measurement unit 4 that measures the pressing force detected by the pressure-sensitive sensor 2 and a memory 8 that stores a reference value or the like used as a reference for determination are connected to the seating body determination unit 3.

【0017】着座体判別部3及び測定ユニット4は、座
席側ドアが開扉すると、スタンバイ状態となり、閉扉し
た直後からセンサ素子5に加えられた押圧力の時間変動
を測定する。測定時間は閉扉してから数秒〜数十秒程度
の時間、具体的には5秒程度〜30秒程度、好ましくは
10秒程度〜20秒程度とする。
When the seat-side door is opened, the seat-body discriminating unit 3 and the measuring unit 4 enter a standby state, and measure the time variation of the pressing force applied to the sensor element 5 immediately after the door is closed. The measurement time is about several seconds to several tens of seconds after the door is closed, specifically, about 5 seconds to about 30 seconds, preferably about 10 seconds to about 20 seconds.

【0018】着座体判別部3は、感圧センサ2に加えら
れる圧力の時間変動、加圧されたセンサ素子5の数の時
間変動、感圧センサ2の圧力分布の重心位置の時間変動
等から着座体Tが人物か物体かを判別する。また、着座
体判別部3は、上記時間変動のうち2項目以上を同時に
測定し、少なくとも1項目において時間変動が認められ
たときは、着座体Tが人物であると判別する。さらに、
着座体判別部3は、感圧センサ2の圧力分布から臀部の
幅を求め、着座体Tの体格を判別することができる。
The seating body discriminating unit 3 detects the time variation of the pressure applied to the pressure-sensitive sensor 2, the time variation of the number of pressurized sensor elements 5, the time variation of the center of gravity of the pressure distribution of the pressure-sensitive sensor 2, and the like. It is determined whether the seated body T is a person or an object. In addition, the seating body determination unit 3 simultaneously measures two or more items of the above time variation, and determines that the seating body T is a person when the time variation is recognized in at least one item. further,
The seating body determination unit 3 determines the width of the buttocks from the pressure distribution of the pressure-sensitive sensor 2 and can determine the physique of the seating body T.

【0019】次に、本発明の着座検知装置の動作につい
て説明する。
Next, the operation of the seat detection device of the present invention will be described.

【0020】座席側ドアが開扉されると、測定ユニット
4及び着座体判別部3がスタンバイ状態となり、閉扉し
た直後から感圧センサ2に加えられた押圧力の時間変動
等を測定する。乗員は閉扉直後にシートベルトを装着し
たり、シートの位置を調整する等して姿勢を変えるた
め、感圧センサ2に加えられる押圧力が変化する。した
がって、測定時間は上記のように、閉扉してから5秒〜
30秒程度、好ましくは10秒〜20秒程度とする。
When the door on the seat side is opened, the measuring unit 4 and the seat discriminating unit 3 are in a standby state, and the time variation of the pressing force applied to the pressure-sensitive sensor 2 immediately after the door is closed is measured. Immediately after the door is closed, the occupant changes his or her posture by wearing a seat belt or adjusting the position of the seat, so that the pressing force applied to the pressure-sensitive sensor 2 changes. Therefore, as described above, the measurement time is from 5 seconds after the door is closed.
It is about 30 seconds, preferably about 10 to 20 seconds.

【0021】測定ユニット4は、感圧センサ2に加えら
れる圧力の時間変動、加圧されたセンサ素子5の数の時
間変動、感圧センサ2の圧力分布の重心位置の時間変動
を測定し、その測定結果は、着座体判別部3に入力さ
れ、判別が行われる。
The measuring unit 4 measures the time variation of the pressure applied to the pressure-sensitive sensor 2, the time variation of the number of pressurized sensor elements 5, and the time variation of the center of gravity of the pressure distribution of the pressure-sensitive sensor 2. The measurement result is input to the seating body discriminating unit 3 and discrimination is performed.

【0022】感圧センサ2のセンサ素子5に押圧力が加
えられない場合には、着座体判別部3は座席1上に着座
体がないものと判別する。
When no pressing force is applied to the sensor element 5 of the pressure-sensitive sensor 2, the seating body determining section 3 determines that there is no seating body on the seat 1.

【0023】感圧センサ2のセンサ素子5に押圧力が加
えられ、かつ押圧力に時間変動がある場合には、何らか
の姿勢変化があることになり、着座体判別部3は、着座
体が人物であると判別し、時間変動が一定の場合には、
着座体が物体であると判別する。判別においては、上記
時間変動のうち2項目以上を同時に測定し、少なくとも
1項目において時間変動が認められたときは、着座体T
が人物であると判別する。
If a pressing force is applied to the sensor element 5 of the pressure-sensitive sensor 2 and the pressing force fluctuates with time, there will be some change in posture, and the seating body determining unit 3 determines that the seating body is a person. And if the time variation is constant,
It is determined that the seat is an object. In the discrimination, two or more items among the above-mentioned time fluctuations are measured at the same time.
Is determined to be a person.

【0024】また、着座体判別部3は、感圧センサ2の
圧力分布から臀部の幅を求めることができるので、その
臀部の幅から着座体Tの体格が大柄か小柄かを判別する
ことができる。
Further, since the sitting body determination section 3 can determine the width of the buttocks from the pressure distribution of the pressure-sensitive sensor 2, it can determine whether the physical size of the sitting body T is large or small based on the width of the buttocks. it can.

【0025】着座体判別部3によって、座席に着座体が
存在しないと判断した場合及び着座体が物体の場合に
は、起爆装置7が作動しないように制御される。したが
って、自動車が衝突してもエアバック6は膨張すること
がない。これによって、エアバック6の取替えやインス
トルメントパネルの修繕等の無駄な出費や物体の損傷を
未然に防止できる。
When the seating body discriminating section 3 determines that there is no seating body in the seat or when the seating body is an object, control is performed so that the detonating device 7 does not operate. Therefore, even if the vehicle collides, the airbag 6 does not expand. As a result, wasteful expenses such as replacement of the airbag 6 and repair of the instrument panel and damage to objects can be prevented.

【0026】着座体判別部3によって、着座体が子供等
の小柄な人物であると判断した場合には、起爆装置7を
作動させないか、エアバック6の膨張速度を低速にす
る。これによって、助手席に着座していた子供がエアバ
ック6に圧迫されるような事故を未然に防止することが
できる。
When the sitting body discriminating section 3 determines that the sitting body is a small person such as a child, the initiating device 7 is not operated or the inflation speed of the airbag 6 is reduced. Thus, it is possible to prevent an accident in which a child sitting in the passenger seat is pressed by the airbag 6 beforehand.

【0027】着座体判別部3によって、着座体Tが大人
等の大柄な人物であると判断した場合には、通常通り起
爆装置7を作動させる。
When the sitting body discriminating section 3 determines that the sitting body T is a large person such as an adult, the detonating device 7 is operated as usual.

【0028】本発明は、上記実施の形態に限定されるこ
とはなく、特許請求の範囲に記載された技術的事項の範
囲内において、種々の変更が可能である。例えば、感圧
センサ2の他に、温度によって変化する素子等温度を検
知するセンサを所定の箇所に設けることにより、そのセ
ンサが着座体(人物)の体温を検知して、乗員が着座し
ているかどうかを判別することができるので、着座体T
の判別をより確実に行うことができる。
The present invention is not limited to the above embodiment, and various changes can be made within the technical scope described in the claims. For example, in addition to the pressure-sensitive sensor 2, by providing a sensor for detecting a temperature such as an element that changes depending on the temperature at a predetermined location, the sensor detects the body temperature of the seated body (person), and the occupant sits down. It is possible to determine whether or not
Can be more reliably determined.

【0029】また、感圧センサ2はシートクッション部
1aだけでなく背もたれのシートバック部1bにも配設
してもよい。
The pressure sensor 2 may be provided not only on the seat cushion 1a but also on the seat back 1b of the backrest.

【0030】さらに、本発明の着座検知装置は、助手席
だけでなく運転席や後部座席などにも適用することがで
き、また、エアバック6の起爆装置7だけでなく、シー
ト位置や背もたれの傾斜角度を自動的に調節できる装置
等各種装置に接続してもよい。
Further, the seating detection device of the present invention can be applied not only to the front passenger seat but also to the driver's seat and the rear seat, and not only to the detonating device 7 for the airbag 6 but also to the seat position and the backrest. It may be connected to various devices such as a device that can automatically adjust the tilt angle.

【0031】なお、図1に示すように、着座者のシート
ベルトの着用の有無を確認するシートベルト着用確認装
置10を設けて、これを着座体判別部3に接続して用い
れば、着座者の有無の判別をより確実に行うことができ
る。また、着座者のシート位置の調整の有無を確認する
シート位置調整確認装置11を設けて、これを着座体判
別部3に接続して用いれば、着座者の有無の判別をより
確実に行うことができる。
As shown in FIG. 1, if a seat belt wearing confirmation device 10 for confirming whether or not a seat belt is worn by a seated person is provided and connected to the seated body discriminating section 3, the seated belt is used. Can be more reliably determined. In addition, if a seat position adjustment checking device 11 for checking whether or not the seat position of the seated person is adjusted is provided and connected to the seated body determination unit 3, the presence or absence of the seated person can be determined more reliably. Can be.

【0032】[0032]

【実施例】本発明者は、助手席に乗員が着座した場合
と、荷物を載せた場合に、着座面に加わる荷重、重心の
座標及び加圧されるセンサの数の時間変化を測定する実
験を行った。図3乃至図5は、その実験結果を示すグラ
フである。この実験では、44個×29個のセンサ素子
をマトリックス状に配置した感圧センサが用いられ、各
センサ素子からの出力を0.5秒毎にサンプリングし
た。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present inventor conducted an experiment to measure the time variation of the load applied to the seating surface, the coordinates of the center of gravity, and the number of sensors to be pressurized when an occupant is seated on the passenger seat and when luggage is loaded. Was done. 3 to 5 are graphs showing the results of the experiment. In this experiment, a pressure-sensitive sensor having 44 × 29 sensor elements arranged in a matrix was used, and the output from each sensor element was sampled every 0.5 seconds.

【0033】図3乃至図5の(a)のグラフは、着座面
に加わる荷重の時間変動を、測定を開始したときの最初
の測定値を1として、30秒間測定した結果を示す。図
3乃至図5の(b)のグラフは、車両の前後方向のセン
サ素子番号を横軸にとり、車両の左右方向のセンサ素子
番号を縦軸にとり、車両の前側を右側にして、圧力分布
の重心位置の変動を示す。図3乃至図5の(c)のグラ
フは、全センサ素子を1として、加圧されるセンサ素子
の数を30秒間測定した結果を示す。
The graphs in FIG. 3A to FIG. 5A show the results obtained by measuring the time variation of the load applied to the seating surface for 30 seconds, with the first measured value at the start of the measurement being 1. The graphs of FIGS. 3 to 5B show the pressure distribution of the pressure distribution by taking the sensor element numbers in the front-rear direction of the vehicle on the horizontal axis, the sensor element numbers in the left-right direction of the vehicle on the vertical axis, and the front side of the vehicle on the right side. This shows a change in the position of the center of gravity. The graphs in FIG. 3C to FIG. 5C show the result of measuring the number of pressurized sensor elements for 30 seconds, assuming that all the sensor elements are 1.

【0034】図3は、乗員が通常に本発明の着座検知装
置を配設したシートクッション部に着座した場合を示
す。図3に示すように、着座面に加わる荷重、重心の座
標及び加圧されるセンサの数のいずれも時間変動が認め
られる。したがって、着座面に加わる荷重、重心の座標
及び加圧されるセンサの数のいずれも時間変動が認めら
れると、着座体が人物であると判別することができる。
FIG. 3 shows a case where an occupant normally sits on a seat cushion portion provided with the seating detection device of the present invention. As shown in FIG. 3, the load applied to the seating surface, the coordinates of the center of gravity, and the number of sensors to be pressurized all have time variations. Therefore, if any of the load applied to the seating surface, the coordinates of the center of gravity, and the number of sensors to be pressed show time fluctuations, it can be determined that the seated body is a person.

【0035】図4は、荷物を本発明の着座検知装置を配
設したシートクッション部に載せた場合を示す。図4に
示すように、着座面に加わる荷重、重心の座標及び加圧
されるセンサの数のいずれも測定を開始した直後からほ
ぼ一定であり、特に重心の座標は全く移動しない。した
がって、着座面に加わる荷重、重心の座標及び加圧され
るセンサの数のいずれもが一定であれば、着座体が物体
であると判別することができる。
FIG. 4 shows a case where a load is placed on a seat cushion provided with the seating detecting device of the present invention. As shown in FIG. 4, all of the load applied to the seating surface, the coordinates of the center of gravity, and the number of sensors to be pressed are almost constant immediately after the start of the measurement, and the coordinates of the center of gravity do not move at all. Therefore, if all of the load applied to the seating surface, the coordinates of the center of gravity, and the number of sensors to be pressed are constant, it is possible to determine that the seated body is an object.

【0036】図5は、乗員が静かに本発明の着座検知装
置を配設したシートクッション部に着座した場合を示
す。図5に示すように、着座面に加わる荷重、重心の座
標及び加圧されるセンサの数のいずれも測定を開始した
直後に若干の時間変動があるものの、その後時間変動は
ほとんどない。ただし、重心位置は明確に変化してい
る。したがって、静かに着座する乗員であっても、重心
位置の変化を検知することにより、着座体が人物である
と確実に判別することができる。
FIG. 5 shows a case where an occupant is quietly seated on a seat cushion provided with the seating detecting device of the present invention. As shown in FIG. 5, the load applied to the seating surface, the coordinates of the center of gravity, and the number of sensors to be pressed have slight time fluctuations immediately after the measurement is started, but there is almost no time fluctuation thereafter. However, the position of the center of gravity has clearly changed. Therefore, even if the occupant sits quietly, it is possible to reliably determine that the seated body is a person by detecting a change in the position of the center of gravity.

【0037】着座体判別部3は、感圧センサ2の圧力分
布から臀部の幅を求め、着座体Tの体格を判別すること
ができる。例えば、身長が1mで体重が15.2kgの
幼児の場合、圧力分布は図6に示すようになり、臀部の
幅が20cmと算出できた。身長が1.37mで体重が
22.9kgの子供の場合、圧力分布は図7に示すよう
になり、臀部の幅は25cmと算出できた。身長が1.
56mで体重が45.5kgの大人の場合は、圧力分布
は図8に示すようになり、臀部の幅は27cmと算出で
きた。
The seating body judging section 3 obtains the width of the buttocks from the pressure distribution of the pressure sensor 2 and can judge the physical size of the seating body T. For example, in the case of an infant having a height of 1 m and a weight of 15.2 kg, the pressure distribution was as shown in FIG. 6, and the width of the buttocks was calculated to be 20 cm. In the case of a child having a height of 1.37 m and a weight of 22.9 kg, the pressure distribution was as shown in FIG. 7, and the width of the buttocks was calculated to be 25 cm. Height is 1.
In the case of an adult of 56 m and weighing 45.5 kg, the pressure distribution was as shown in FIG. 8, and the width of the buttocks was calculated to be 27 cm.

【0038】このように、算出された臀部の幅から着座
体Tの体格が大柄か小柄かを判別することが可能であ
る。
As described above, it is possible to determine whether the physique of the sitting body T is large or small from the calculated width of the buttocks.

【0039】[0039]

【発明の効果】本発明によれば、少なくともシートクッ
ション部に配設され、着座体の押圧力を検知する感圧セ
ンサと、その感圧センサによって検知された押圧力の時
間変動に基づいて着座体を判別する着座体判別手段と、
を有するので、座席上の着座体が人物か物体か、人物の
場合にはその体格を確実に判別できる。
According to the present invention, the pressure sensor is provided at least in the seat cushion portion and detects the pressing force of the seating member, and the seating is performed based on the time variation of the pressing force detected by the pressure sensor. A sitting body determining means for determining a body,
Therefore, if the seated body on the seat is a person or an object, and if the person is a person, the physique can be reliably determined.

【0040】従って、本発明の着座検知装置による判別
結果に基づいて、例えばエアバックの起爆装置等の作動
を制御すれば、荷物が載せられているときにエアバック
が膨張することを防止することができるため、無駄にエ
アバックの交換やインストルメントパネルを修繕する必
要がなくなる。
Therefore, if the operation of, for example, the airbag detonator is controlled based on the result of the discrimination by the seating detection device of the present invention, it is possible to prevent the airbag from expanding when a load is loaded. Therefore, there is no need to replace the airbag or repair the instrument panel needlessly.

【0041】さらに、乗員の体格に応じてエアバックの
膨張速度を制御することができるため、子供がエアバッ
クに圧迫されるという事故を未然に防止することができ
る。
Furthermore, since the inflation speed of the airbag can be controlled according to the occupant's physique, it is possible to prevent a child from being compressed by the airbag.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の着座検知装置を概略的に示す側面図で
ある。
FIG. 1 is a side view schematically showing a seating detection device according to the present invention.

【図2】本発明の着座検知装置の感圧センサを示す平面
図である。
FIG. 2 is a plan view showing a pressure-sensitive sensor of the seating detection device of the present invention.

【図3】乗員が通常に本発明の着座検知装置を配設した
シートクッション部に着座した場合であって、(a)は
着座面に加わる荷重の時間変動、(b)は重心の座標の
時間変動、(c)は加圧されるセンサ数の時間変動をそ
れぞれ示すグラフである。
FIGS. 3A and 3B show a case where an occupant normally sits on a seat cushion unit provided with the seating detection device of the present invention, wherein FIG. 3A shows a time variation of a load applied to a seating surface, and FIG. (C) is a graph showing the time variation of the number of pressurized sensors, respectively.

【図4】荷物を本発明の着座検知装置を配設したシート
クッション部に載せた場合であって、(a)は着座面に
加わる荷重の時間変動、(b)は重心の座標の時間変
動、(c)は加圧されるセンサ数の時間変動をそれぞれ
示すグラフである。
4A and 4B show a case where a load is placed on a seat cushion portion provided with a seating detection device of the present invention, wherein FIG. 4A shows a time variation of a load applied to a seating surface, and FIG. 4B shows a time variation of coordinates of a center of gravity. And (c) are graphs respectively showing the time variation of the number of pressurized sensors.

【図5】乗員が静かに本発明の着座検知装置を配設した
シートクッション部に着座した場合であって、(a)は
着座面に加わる荷重の時間変動、(b)は重心の座標の
時間変動、(c)は加圧されるセンサ数の時間変動をそ
れぞれ示すグラフである。
FIGS. 5A and 5B show a case where an occupant quietly sits on a seat cushion portion on which the seating detection device of the present invention is disposed, wherein FIG. 5A shows a time variation of a load applied to a seating surface, and FIG. (C) is a graph showing the time variation of the number of pressurized sensors, respectively.

【図6】幼児が本発明の着座検知装置を配設したシート
クッション部に着座したときの圧力分布を3次元的に表
示した図である。
FIG. 6 is a view three-dimensionally showing a pressure distribution when an infant is seated on a seat cushion portion provided with the seating detection device of the present invention.

【図7】子供が本発明の着座検知装置を配設したシート
クッション部に着座したときの圧力分布を3次元的に表
示した図である。
FIG. 7 is a diagram three-dimensionally showing a pressure distribution when a child is seated on a seat cushion provided with the seating detection device of the present invention.

【図8】大人が本発明の着座検知装置を配設したシート
クッション部に着座したときの圧力分布を3次元的に表
示した図である。
FIG. 8 is a diagram three-dimensionally displaying a pressure distribution when an adult sits on a seat cushion portion provided with the seating detection device of the present invention.

【符号の説明】[Explanation of symbols]

T:着座体 1:座席 1a:シートクッション部 2:感圧センサ 3:着座体判別部(着座体判別手段) 4:測定ユニット 5:センサ素子 6:エアバック 7:起爆装置 8:メモリ 9:起爆制御部 10:シートベルト着用確認装置 11:シート位置調整確認装置 T: Seated body 1: Seat 1a: Seat cushion section 2: Pressure sensor 3: Seated body discriminating section (seated body discriminating means) 4: Measurement unit 5: Sensor element 6: Air bag 7: Detonator 8: Memory 9: Detonation control unit 10: Seat belt wearing confirmation device 11: Seat position adjustment confirmation device

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】少なくともシートクッション部に配設さ
れ、着座体の押圧力を検知する感圧センサと、その感圧
センサによって検知された押圧力の時間変動に基づいて
着座体を判別する着座体判別手段と、を有することを特
徴とする着座検知装置。
1. A pressure-sensitive sensor provided at least in a seat cushion portion for detecting a pressing force of a seating body, and a seating body for discriminating the seating body based on a time variation of the pressing force detected by the pressure-sensitive sensor. And a determination unit.
【請求項2】前記感圧センサは、2次元マトリックス状
に配置された複数のセンサ素子を有することを特徴とす
る請求項1に記載の着座検知装置。
2. The seating detection device according to claim 1, wherein the pressure sensor has a plurality of sensor elements arranged in a two-dimensional matrix.
【請求項3】着座体の温度を検知するセンサを有するこ
とを特徴とする請求項1又は2に記載の着座検知装置。
3. The seating detecting device according to claim 1, further comprising a sensor for detecting a temperature of the seating body.
JP9130858A 1997-01-13 1997-05-21 Seating detecting device Pending JPH10318861A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP9130858A JPH10318861A (en) 1997-05-21 1997-05-21 Seating detecting device
DE19880187T DE19880187T1 (en) 1997-01-13 1998-01-13 Seat with seat sensor, seat recognition device and airbag device
PCT/JP1998/000081 WO1998030413A1 (en) 1997-01-13 1998-01-13 Seat fitted with seating sensor, seating detector and air bag device
US09/142,694 US6345839B1 (en) 1997-01-13 1998-01-13 Seat fitted with seating sensor, seating detector and air bag device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9130858A JPH10318861A (en) 1997-05-21 1997-05-21 Seating detecting device

Publications (1)

Publication Number Publication Date
JPH10318861A true JPH10318861A (en) 1998-12-04

Family

ID=15044351

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9130858A Pending JPH10318861A (en) 1997-01-13 1997-05-21 Seating detecting device

Country Status (1)

Country Link
JP (1) JPH10318861A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000044584A1 (en) * 1999-01-27 2000-08-03 The Furukawa Electric Co., Ltd. Occupant detecting device
JP2001201412A (en) * 1999-11-09 2001-07-27 Denso Corp Seating passenger number determining device of vehicle seat
JP2002022577A (en) * 2000-07-05 2002-01-23 Denso Corp Occupant discrimination system for automobile
JP2005003670A (en) * 2003-05-06 2005-01-06 Mitsubishi Electric Information Technology Centre Europa Bv Device for monitoring seat occupant
JP2005536396A (en) * 2002-08-29 2005-12-02 ザトーリウス アクチエン ゲゼルシャフト Device for identifying the occupation type of the support surface
FR2871416A1 (en) * 2004-06-15 2005-12-16 Faurecia Sieges Automobile Adjusting device for vehicle seat, has anchor plate, made up of single piece, presenting U shaped section with median branch from which lateral branches extend, and reducer mounted on plate by fitting in lateral branches` openings
JP2012162196A (en) * 2011-02-08 2012-08-30 Honda Motor Co Ltd Control device for equipment
CN110946584A (en) * 2019-10-18 2020-04-03 沈阳大学 Method for recognizing human body sitting posture by using piezoresistive film pressure sensor group
CN112244562A (en) * 2020-10-14 2021-01-22 珠海格力电器股份有限公司 Mattress system and bedwetting treatment method

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000044584A1 (en) * 1999-01-27 2000-08-03 The Furukawa Electric Co., Ltd. Occupant detecting device
US6490515B1 (en) 1999-01-27 2002-12-03 The Furukawa Electric Co., Ltd. Passenger detecting apparatus
JP2001201412A (en) * 1999-11-09 2001-07-27 Denso Corp Seating passenger number determining device of vehicle seat
JP2002022577A (en) * 2000-07-05 2002-01-23 Denso Corp Occupant discrimination system for automobile
JP2005536396A (en) * 2002-08-29 2005-12-02 ザトーリウス アクチエン ゲゼルシャフト Device for identifying the occupation type of the support surface
JP4675106B2 (en) * 2002-08-29 2011-04-20 ザトーリウス アクチエン ゲゼルシャフト Device for identifying the occupation type of the support surface
JP2005003670A (en) * 2003-05-06 2005-01-06 Mitsubishi Electric Information Technology Centre Europa Bv Device for monitoring seat occupant
FR2871416A1 (en) * 2004-06-15 2005-12-16 Faurecia Sieges Automobile Adjusting device for vehicle seat, has anchor plate, made up of single piece, presenting U shaped section with median branch from which lateral branches extend, and reducer mounted on plate by fitting in lateral branches` openings
JP2012162196A (en) * 2011-02-08 2012-08-30 Honda Motor Co Ltd Control device for equipment
CN110946584A (en) * 2019-10-18 2020-04-03 沈阳大学 Method for recognizing human body sitting posture by using piezoresistive film pressure sensor group
CN112244562A (en) * 2020-10-14 2021-01-22 珠海格力电器股份有限公司 Mattress system and bedwetting treatment method
CN112244562B (en) * 2020-10-14 2022-01-28 珠海格力电器股份有限公司 Mattress system and bedwetting treatment method

Similar Documents

Publication Publication Date Title
JP2781745B2 (en) A device for preventing the operation of a vehicle occupant restraint system
US6056079A (en) Automotive seat weight sensing system
US5997033A (en) Adaptive airbag inflation method and apparatus
US6394490B2 (en) Vehicle occupant position detector and airbag control system
US5573269A (en) Apparatus and method for sensing and restraining an occupant of a vehicle seat
JP2535120B2 (en) Occupant detection device
US6416080B1 (en) Apparatus and method for protecting a vehicle occupant utilizing a correlation between an occupant-associated center and a distance to an occupant-associated surface
KR20000052673A (en) An occupant sensing and crash behavior system
JPH07186879A (en) Device and method for controlling occupant restraint system
JPH05193439A (en) Method and apparatus for controlling crew restriction system using real time vector analysis
JPH10100857A (en) Occupant restriction device
JP2000085524A (en) Side air bag device
JP4761728B2 (en) Crew monitoring device
US6494284B1 (en) Seat arrangement for a vehicle having an actuatable occupant protection device
JPH10318861A (en) Seating detecting device
WO1998030411A1 (en) Automotive seat weight sensing system
US20070182139A1 (en) Advanced Weight Responsive Supplemental Restraint Computer System
US5788271A (en) Air bag safety device for vehicles
EP0892728B1 (en) Automotive seat weight sensing system
JP2000296757A (en) Operation control system for vehicle occupant protection device
JPH10194024A (en) Seating sensor-carried seat
JPH10236197A (en) Seat with seating sensor
JPH10287162A (en) Seat taking detection device
KR100599561B1 (en) Passenger's seat status measurement device in vehicle
KR100337824B1 (en) Operation control device of airbag and seatbelt for automobile