JPH0499962A - Judging apparatus for collision of vehicle - Google Patents
Judging apparatus for collision of vehicleInfo
- Publication number
- JPH0499962A JPH0499962A JP21700090A JP21700090A JPH0499962A JP H0499962 A JPH0499962 A JP H0499962A JP 21700090 A JP21700090 A JP 21700090A JP 21700090 A JP21700090 A JP 21700090A JP H0499962 A JPH0499962 A JP H0499962A
- Authority
- JP
- Japan
- Prior art keywords
- collision
- waveform
- vehicle
- acceleration sensor
- output
- 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.)
- Granted
Links
- 230000001133 acceleration Effects 0.000 claims abstract description 41
- 238000000605 extraction Methods 0.000 claims abstract description 30
- 239000000284 extract Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 238000001228 spectrum Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
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Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は車両の衝突判定装置に関し、特に、衝突時の加
速度センサの出力波形の特徴を抽出することにより衝突
を判定する車両の衝突判定装置に係る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vehicle collision determination device, and particularly to a vehicle collision determination device that determines a collision by extracting characteristics of the output waveform of an acceleration sensor at the time of a collision. Pertains to.
従来、車両の衝突判定は、加速度センサを車両に複数個
設け、それらから得られる加速度の絶対値により判定を
行うもの、あるいは加速度センサの出力信号を積分し、
その積分値から判定を行うもの等がある。Conventionally, vehicle collisions have been determined by installing multiple acceleration sensors in the vehicle and making a determination based on the absolute value of the acceleration obtained from them, or by integrating the output signals of the acceleration sensors.
There are methods that make judgments based on the integral value.
これらは、いずれも加速度センサからの出力信号から車
両の衝突を定量的に判断するものである。All of these methods quantitatively determine a vehicle collision based on an output signal from an acceleration sensor.
ところで、上記のもののように加速度センサの出力信号
から車両の衝突を定量的に判断するものでは、車両の衝
突のみを確実に検知するには不十分である。By the way, the method of quantitatively determining a vehicle collision based on the output signal of an acceleration sensor as described above is insufficient to reliably detect only a vehicle collision.
本発明は上記実情に鑑みて創案されたものであって、車
両の衝突時における加速度センサの出力波形の特徴に着
目し、この出力波形の特徴から車両の衝突のみを確実に
検知することができる車両の衝突判定装置を提供しよう
とものである。The present invention was devised in view of the above circumstances, and focuses on the characteristics of the output waveform of an acceleration sensor at the time of a vehicle collision, and can reliably detect only vehicle collisions from the characteristics of this output waveform. The present invention aims to provide a collision determination device for a vehicle.
本発明は上記目的を達成するために、車両の加速度を検
出する加速度センサと、加速度センサの出力信号から波
形の特徴を抽出する波形特徴抽出部と、波形特徴抽出部
が抽出した波形の特徴から衝突かいなかを判定する衝突
判定部とを備えて構成された。In order to achieve the above object, the present invention includes an acceleration sensor that detects the acceleration of a vehicle, a waveform feature extractor that extracts waveform features from the output signal of the acceleration sensor, and a waveform feature extractor that extracts waveform features from the waveform feature extractor. The vehicle is configured to include a collision determination section that determines whether or not there is a collision.
また、前記衝突判定部は波形特徴抽出部が抽出した波形
の特徴が衝突時の波形の特徴に類似しているかいなかに
より衝突かいなかを判定する構成とした。Further, the collision determination section is configured to determine whether there is a collision or not based on whether the waveform features extracted by the waveform feature extraction section are similar to the waveform characteristics at the time of the collision.
また、前記衝突判定部は波形特徴抽出部が抽出した波形
の周波数に衝突時の波形の周波数があるかいなかにより
衝突かいなかを判定する構成とした。Further, the collision determination unit is configured to determine whether there is a collision or not based on whether the frequency of the waveform at the time of collision is included in the frequency of the waveform extracted by the waveform feature extraction unit.
さらに、前記加速度センサの出力信号が一定以上である
かいなかを判別する加速度判別部を備え、前記衝突判定
部は加速度判別部及び波形特徴抽出部からの出力信号の
負論理積をとることにより(h突かいなかを判定するこ
とが好ましい。Furthermore, it includes an acceleration determination unit that determines whether the output signal of the acceleration sensor is above a certain level, and the collision determination unit calculates the negative AND of the output signals from the acceleration determination unit and the waveform feature extraction unit. It is preferable to judge whether or not h is hit.
本発明の構成によれば、加速度センサにより加速度が検
出され、この加速度の出力信号から波形特徴抽出部が波
形の特徴を抽出し、抽出された波形の特徴から衝突判定
部により衝突時かいなかの判定が行われる。According to the configuration of the present invention, acceleration is detected by the acceleration sensor, the waveform feature extraction unit extracts waveform features from the output signal of this acceleration, and the collision determination unit determines whether the collision occurred or not. A judgment is made.
また、衝突判定部は波形特徴抽出部により抽出された波
形の特徴が衝突時の波形の特徴に類似しているかいなか
により衝突かいなかの判定を行う。Further, the collision determination unit determines whether there is a collision or not based on whether the waveform features extracted by the waveform feature extraction unit are similar to the waveform characteristics at the time of the collision.
また、衝突判定部は波形特徴抽出部により抽出された波
形の周波数に衝突時の波形の周波数があるかいなかによ
り衝突かいなかの判定を行う。Further, the collision determination unit determines whether there is a collision or not based on whether the frequency of the waveform extracted by the waveform feature extraction unit includes the frequency of the waveform at the time of collision.
さらに、前記衝突判定部は加速度センサの出力信号が一
定以上であるかいなかを判別する加速度判別部及び前記
波形特徴抽出部からの出力信号の負論理積をとることに
より衝突かいなかを判定する。Further, the collision determining section determines whether there is a collision or not by performing a negative AND of the output signals from the acceleration determining section and the waveform feature extracting section, which determine whether the output signal of the acceleration sensor is above a certain level or not.
本発明を図面に示された一実施例に基づいて説明する。 The present invention will be explained based on an embodiment shown in the drawings.
第1図は回路構成を示すブロック図、第2図は衝突波形
特徴抽出部の回路構成を示すプロ・ツク図、第3図は車
室内で測定された衝突時の加速度センサの出力波形図、
第4図は衝突時の加速度センサの出力波形のスペクトル
図、第5図は衝突時の加速度センサの出力波形の標準パ
ターンスペクトル図である。Fig. 1 is a block diagram showing the circuit configuration, Fig. 2 is a block diagram showing the circuit configuration of the collision waveform feature extraction section, and Fig. 3 is an output waveform diagram of the acceleration sensor at the time of a collision measured inside the vehicle.
FIG. 4 is a spectrum diagram of the output waveform of the acceleration sensor at the time of a collision, and FIG. 5 is a standard pattern spectrum diagram of the output waveform of the acceleration sensor at the time of a collision.
1は車室内に配置され車両の加速度を検出する加速度セ
ンサであり、この加速度センサ1の出力は車両の衝突時
に第3図に示すような出力波形を示す。すなわち、第3
図は、緩やかな周波数のサインカーブで衝撃が伝播し、
この出力波形のスペクトル成分を調べると第4図及び第
5図の八で示すように、約1 kHzの周波数成分を含
む特徴があることが判る。この加速度センサ1からの出
力はローパスフィルター2に入力し、ローパスフィルタ
ー2でノイズ成分が除去された後、A/D変換器3に入
力してディジタル信号に変換される。ディジタル信号に
変換されたセンサ出力信号はオフセント積分演算部4及
び衝突波形特徴抽出部5に入力される。オフセット積分
演算部4では、ノイズ成分等を除去するために約−4G
のオフセット値を設定して入力されたディジクル信号を
積分する。この積分値OFIは、加速度信号aとオフセ
ット積分演算部4のオフセット値athとを用いて次式
により得られる。Reference numeral 1 denotes an acceleration sensor disposed inside the vehicle interior to detect the acceleration of the vehicle, and the output of this acceleration sensor 1 exhibits an output waveform as shown in FIG. 3 when the vehicle collides. That is, the third
The figure shows that the shock propagates along a sine curve with a gentle frequency.
When examining the spectral components of this output waveform, it is found that it has a characteristic including a frequency component of approximately 1 kHz, as shown by 8 in FIGS. 4 and 5. The output from the acceleration sensor 1 is input to a low-pass filter 2, where noise components are removed, and then input to an A/D converter 3 where it is converted into a digital signal. The sensor output signal converted into a digital signal is input to an offset integral calculation section 4 and a collision waveform feature extraction section 5. The offset integral calculation unit 4 uses approximately -4G to remove noise components, etc.
The input digital signal is integrated by setting the offset value of . This integral value OFI is obtained by the following equation using the acceleration signal a and the offset value ath of the offset integral calculation section 4.
OF I = ((a−ath) dtただし、OFT
≧0゜オフセット積分演算部4により得られた積分値O
FIは第1コンパレータ6に入力され、第1コンパレー
タ6でオフセット積分の基準値0FIoと比較され、比
較結果に応じるで出力信号が衝突判定部7の一方の入力
端に入力する。OF I = ((a-ath) dt However, OFT
≧0° Integral value O obtained by offset integral calculation unit 4
FI is input to the first comparator 6, where it is compared with a reference value 0FIo for offset integration, and an output signal is input to one input end of the collision determination section 7 according to the comparison result.
一方、衝突波形特徴抽出部5は第2図に示すように、複
数個のバンドパスフィルター5A、・・・から構成され
、各バンドパスフィルター5A、・・・により各周波数
のスペクトル成分が抜き出される。この抜き出されたス
ペクトル成分には衝突時においては第4図に示すように
約1kHzの周波数成分を含むことが判る。そして、こ
の衝突波形抽出部5は衝突時において、この約1kHz
の周波数成分を抽出して衝突波形類似性演算部8に出力
する。衝突波形類似性演算部8では第4図に示す衝突時
の波形のスペクトルと第5図に示す衝突時の標準波形パ
ターンのスペクトルとの類似性が演算される。この類似
性は次式により得られる。On the other hand, as shown in FIG. 2, the collision waveform feature extraction unit 5 is composed of a plurality of bandpass filters 5A, . . . , and each bandpass filter 5A, . It will be done. It can be seen that this extracted spectrum component includes a frequency component of approximately 1 kHz at the time of collision, as shown in FIG. The collision waveform extraction unit 5 extracts this approximately 1kHz signal at the time of collision.
frequency components are extracted and output to the collision waveform similarity calculation section 8. The collision waveform similarity calculating section 8 calculates the similarity between the spectrum of the waveform at the time of collision shown in FIG. 4 and the spectrum of the standard waveform pattern at the time of collision shown in FIG. 5. This similarity is obtained by the following equation.
+ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・
+ (NG (f n) −Gf n)2そして、上記
衝突波形類似性演算部8からの出力は第2コンパレータ
9に入力され、第2コンパレータ9で類似性の基準値N
Yoとの比較が行われ、基準値NYo以上のときには信
号が衝突判定部7の他方の入力端に入力する。+ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・
+ (NG (f n) - Gf n)2 The output from the collision waveform similarity calculation unit 8 is input to the second comparator 9, and the second comparator 9 calculates the similarity reference value N.
A comparison with Yo is performed, and when it is greater than or equal to the reference value NYo, a signal is input to the other input terminal of the collision determination section 7.
衝突判定部7では、上記両コンパレータ6.9から出力
信号が同時に入力すると、衝突であることを判定して、
衝突判定信号CJSをエアバックシステム等に出力する
。When the output signals from both the comparators 6.9 are input simultaneously, the collision determination section 7 determines that there is a collision, and
The collision determination signal CJS is output to the airbag system, etc.
かかる構成において、加速度センサ1が加速度を検出し
てローパスフィルター2に信号が出力し、ローパスフィ
ルター2では信号のノイズ成分が除去されてA、 /
D変換器3に出力し、ディジタル信号に変換される。A
/D変換器3でディジタル値に変換された信号はオフセ
ント積分演算部4及び衝突波形特徴抽出部5に出力され
る。オフセント積分演算部4では、オフセット値を設定
して積分が行われ、積分値OFIが第1コンパレータ6
に出力される。第1コンパレーク6では積分4aOF■
と積分の基準値○FIoとの比較が行われ、比較結果に
応じて衝突判定部7に出力される。一方、A/D変換器
3からの信号が入力された衝突波形特徴抽出部5では第
4図に示すように周波数成分を抽出し、抽出結果を衝突
波形類似性演算部8に出力する。衝突波形類似性演算部
8では、第5図に示す衝突時の標準パターンと抽出され
た波形の特徴との間の類似性の有無を演算し、類似性が
あるときは第2コンパレータ9に出力する。第2コンパ
レータ9では衝突波形類似性演算部8からの出力信号N
Yと、類似性基準値NYoとの比較が行われ、比較結果
に応じて衝突判定部7に出力する。衝突判定部7では両
コンパレータ6.9からの出力信号が同時に入力すると
、衝突であると判定して衝突判定信号CJSを出力する
。In this configuration, the acceleration sensor 1 detects acceleration and outputs a signal to the low-pass filter 2, and the low-pass filter 2 removes the noise component of the signal to obtain A, /
The signal is output to the D converter 3 and converted into a digital signal. A
The signal converted into a digital value by the /D converter 3 is output to an offset integral calculation section 4 and a collision waveform feature extraction section 5. The offset integral calculation section 4 performs integration by setting an offset value, and the integral value OFI is sent to the first comparator 6.
is output to. In the first comparator 6, the integral 4aOF■
A comparison is made with the integral reference value ○FIo, and the comparison result is output to the collision determination section 7. On the other hand, the collision waveform feature extraction section 5 to which the signal from the A/D converter 3 is input extracts frequency components as shown in FIG. 4, and outputs the extraction result to the collision waveform similarity calculation section 8. The collision waveform similarity calculation unit 8 calculates whether there is similarity between the standard pattern at the time of collision shown in FIG. do. The second comparator 9 outputs the output signal N from the collision waveform similarity calculating section 8.
A comparison is made between Y and the similarity reference value NYo, and output to the collision determination unit 7 according to the comparison result. When the output signals from both comparators 6.9 are input simultaneously, the collision determination section 7 determines that there is a collision and outputs a collision determination signal CJS.
第6図は第2実施例を示す。このものは、上記第1実施
例のものが衝突時の出力波形と衝突時の出力波形の標準
パターンとの間の類似性のいかんにより衝突かいなかを
判定し六−ものであるのに対し、衝突時の周波数成分の
有無により(■j突を判別するものである。上記ij突
波形特徴抽出部5の位置に衝突周波数成分抽出演算部5
aが接続されるとともに、この衝突周波数成分抽出演算
部5aと衝突判定部7との間に第2コンパレータ9aが
接続されている。なお、CFは衝突周波数成分抽出演算
部5aの出力信号、GFoは第2コンパレータ9aの陽
極側端子に入力される(■i突同周波数成分基準値ある
。FIG. 6 shows a second embodiment. In contrast to the first embodiment described above, which determines whether or not a collision occurs based on the similarity between the output waveform at the time of a collision and the standard pattern of the output waveform at the time of a collision, Depending on the presence or absence of a frequency component at the time of a collision, (■J collision is determined.) A collision frequency component extraction calculation unit 5 is installed at the position of the above-mentioned ij sudden waveform feature extraction unit 5.
a is connected, and a second comparator 9a is connected between the collision frequency component extraction calculation section 5a and the collision determination section 7. Note that CF is the output signal of the collision frequency component extraction calculation unit 5a, and GFo is input to the anode side terminal of the second comparator 9a (■i There is a sudden frequency component reference value.
そして、A/D変換器3からの出力信号が衝突周波数成
分抽出演算部5aに入力されると、衝突周波数成分抽出
演算部5aでは衝突時の周波数成分、すなわち、1 k
Hzの周波数成分CFが抽出されて第2コンパレータ9
aの陰極側の入力端子に入力され、第2コンパレータ9
aで衝突周波数成分基準値GFoとの比較が行われ、比
較結果に応じて信号が衝突判定部7に出力される。Then, when the output signal from the A/D converter 3 is input to the collision frequency component extraction calculation section 5a, the collision frequency component extraction calculation section 5a extracts the frequency component at the time of the collision, that is, 1 k
The frequency component CF of Hz is extracted and sent to the second comparator 9.
is input to the cathode side input terminal of a, and the second comparator 9
A comparison with the collision frequency component reference value GFo is performed at step a, and a signal is output to the collision determination section 7 according to the comparison result.
以上の説明から明らかなように、本発明によれば、加速
度センサにより検出される出力波形の特徴を抽出し、こ
の出力波形により衝突の有無が定性的に判定できるので
、衝突を確実に判定することができる。As is clear from the above description, according to the present invention, the characteristics of the output waveform detected by the acceleration sensor are extracted, and the presence or absence of a collision can be qualitatively determined based on this output waveform, so that a collision can be reliably determined. be able to.
また、前記衝突判定部は加速度判別部及び波形特徴抽出
部からの出力信号の負論理積をとることにより衝突かい
なかを判定し、定性的かつ定量的に確かな場合に衝突で
あることを判定するので、より一層衝突を確実に判定す
ることができる。Further, the collision determination unit determines whether there is a collision or not by taking the negative AND of the output signals from the acceleration determination unit and the waveform feature extraction unit, and determines that it is a collision if it is qualitatively and quantitatively certain. Therefore, collision can be determined more reliably.
図面は本発明に関する車両の衝突判別装置の一実施例を
示し、第1図は回路構成を示すブロック図、第2図は衝
突波形特徴抽出部の回路構成を示すブロック図、第3図
は車室内で測定された衝突時の加速度センサの出力波形
図、第4図は衝突時の加速度センサの出力波形のスペク
トル図、第5図は衝突時の加速度センサの出力波形の標
準パターンスペクトル図、第6図第2実施例の回路構成
を示すブロック図である。
(主要部分を示す図面の簡単な説明)
1・・加速度センサ
4・・オフセット積分演算部
衝突波形特徴抽出部
・衝突周波数成分抽出演算部
第1コンパレータ
衝突判定部
衝突波形類似性演算部
a・・第2コンパレータThe drawings show an embodiment of the vehicle collision determination device according to the present invention, FIG. 1 is a block diagram showing the circuit configuration, FIG. 2 is a block diagram showing the circuit configuration of the collision waveform feature extraction section, and FIG. Figure 4 is a spectrum diagram of the output waveform of the acceleration sensor during a collision measured indoors. Figure 5 is a standard pattern spectrum diagram of the output waveform of the acceleration sensor during a collision. FIG. 6 is a block diagram showing the circuit configuration of the second embodiment. (Brief explanation of the drawing showing the main parts) 1. Acceleration sensor 4. Offset integral calculation section Collision waveform feature extraction section Collision frequency component extraction calculation section First comparator Collision determination section Collision waveform similarity calculation section a... 2nd comparator
Claims (4)
センサの出力信号から波形の特徴を抽出する波形特徴抽
出部と、波形特徴抽出部が抽出した波形の特徴から衝突
かいなかを判定する衝突判定部とを備えて構成されたこ
とを特徴とする車両の衝突判定装置。(1) An acceleration sensor that detects vehicle acceleration, a waveform feature extraction unit that extracts waveform features from the output signal of the acceleration sensor, and a collision determination that determines whether there is a collision or not based on the waveform features extracted by the waveform feature extraction unit. What is claimed is: 1. A collision determination device for a vehicle, comprising:
の特徴が衝突時の波形の特徴に類似しているかいなかに
より衝突かいなかを判定することを特徴とする請求項1
記載の車両の衝突判定装置。(2) The collision determination unit determines whether there is a collision or not based on whether the waveform features extracted by the waveform feature extraction unit are similar to the waveform characteristics at the time of the collision.
A collision determination device for the vehicle described above.
の周波数に衝突時の波形の周波数があるかいなかにより
衝突かいなかを判定することを特徴とする請求項1記載
の車両の衝突判定装置。(3) The vehicle collision determination unit according to claim 1, wherein the collision determination unit determines whether there is a collision or not based on whether the frequency of the waveform extracted by the waveform feature extraction unit includes a frequency of the waveform at the time of the collision. Device.
いなかを判別する加速度判別部を備え、前記衝突判定部
は加速度判別部及び波形特徴抽出部からの出力信号の負
論理積をとることにより衝突かいなかを判定することを
特徴とする請求項1、2乃至3記載の車両の衝突判定装
置。(4) An acceleration determination unit that determines whether the output signal of the acceleration sensor is above a certain level or not, and the collision determination unit calculates the negative AND of the output signals from the acceleration determination unit and the waveform feature extraction unit. 4. A collision determination device for a vehicle according to claim 1, wherein the vehicle collision determination device determines whether or not a collision occurs.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2217000A JP2761800B2 (en) | 1990-08-20 | 1990-08-20 | Vehicle collision determination device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2217000A JP2761800B2 (en) | 1990-08-20 | 1990-08-20 | Vehicle collision determination device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0499962A true JPH0499962A (en) | 1992-03-31 |
JP2761800B2 JP2761800B2 (en) | 1998-06-04 |
Family
ID=16697249
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2217000A Expired - Fee Related JP2761800B2 (en) | 1990-08-20 | 1990-08-20 | Vehicle collision determination device |
Country Status (1)
Country | Link |
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JP (1) | JP2761800B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05288766A (en) * | 1992-04-13 | 1993-11-02 | Honda Motor Co Ltd | Determining apparatus of collision |
JP2003329539A (en) * | 2002-05-15 | 2003-11-19 | Mazda Motor Corp | Method for creating vehicle crash prediction waveform |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4842301A (en) * | 1988-09-02 | 1989-06-27 | General Motors Corporation | Acoustic emission automotive crash sensor |
-
1990
- 1990-08-20 JP JP2217000A patent/JP2761800B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4842301A (en) * | 1988-09-02 | 1989-06-27 | General Motors Corporation | Acoustic emission automotive crash sensor |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05288766A (en) * | 1992-04-13 | 1993-11-02 | Honda Motor Co Ltd | Determining apparatus of collision |
JP2003329539A (en) * | 2002-05-15 | 2003-11-19 | Mazda Motor Corp | Method for creating vehicle crash prediction waveform |
Also Published As
Publication number | Publication date |
---|---|
JP2761800B2 (en) | 1998-06-04 |
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