JP2005112101A - Display device of inter-vehicle distance - Google Patents

Display device of inter-vehicle distance Download PDF

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JP2005112101A
JP2005112101A JP2003347747A JP2003347747A JP2005112101A JP 2005112101 A JP2005112101 A JP 2005112101A JP 2003347747 A JP2003347747 A JP 2003347747A JP 2003347747 A JP2003347747 A JP 2003347747A JP 2005112101 A JP2005112101 A JP 2005112101A
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JP4211978B2 (en
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Kengo Takeno
謙吾 竹野
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Kenwood KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device of inter-vehicle distance which displays the numerical value of the necessary inter-vehicle distance and does not display the numerical value of the inter-vehicle distance which is unnecessary or gives a driver and fellow passengers cause for anxiety. <P>SOLUTION: The display device of inter-vehicle distance is equipped with a preceding vehicle inter-vehicle distance detection part 2 measuring the inter-vehicle between the preceding vehicle existing in front of an own vehicle and the own vehicle, a vehicle information analysis part 1 where a signal is inputted from the preceding vehicle inter-vehicle distance detection part and an image signal is calculated, and a display part 3 where the signal is inputted from the vehicle information analysis part 1, the preceding vehicle 3a is displayed at the position according to the inter-vehicle distance between the preceding vehicle and the own vehicle, and the inter-vehicle distance 3b is numerically displayed. When the inter-vehicle distance is not more than a predetermined value, the numerical value display 3b is not performed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明は安全運転支援システムに係わり、特に、車両の走行中に自車両の前方に存在する先行車両と自車両との車間距離を表示する車間距離表示装置に関する。   The present invention relates to a safe driving support system, and more particularly, to an inter-vehicle distance display device that displays an inter-vehicle distance between a preceding vehicle and the own vehicle existing ahead of the own vehicle while the vehicle is traveling.

従来、車両走行の安全性を高めるために先行車両と自車両との車間距離を表示する車間距離表示装置が知られている。図３は従来の先行車両と自車両との車間距離を表示する車間距離表示装置の例を示すブロック図である。図３に示す２は車両の中央より前方の左右配置された２つのカメラにより三角測量により先行車両との車間距離を計測してそのデータを車両情報解析部１に出力する先行車間距離検出部である。なお、車間距離はレーザ光を発射してそれが反射されて戻る時間を計測することによっても得ることができる。   2. Description of the Related Art Conventionally, an inter-vehicle distance display device that displays an inter-vehicle distance between a preceding vehicle and the host vehicle is known in order to enhance vehicle safety. FIG. 3 is a block diagram showing an example of an inter-vehicle distance display device that displays an inter-vehicle distance between a conventional preceding vehicle and the host vehicle. Reference numeral 2 shown in FIG. 3 is a preceding inter-vehicle distance detection unit that measures the inter-vehicle distance from the preceding vehicle by triangulation using two cameras arranged in front of the center of the vehicle and outputs the data to the vehicle information analysis unit 1. is there. The inter-vehicle distance can also be obtained by emitting a laser beam and measuring the time it is reflected and returned.

車両情報解析部１は入力された先行車間距離のデータにより表示部３に表示する画像信号を算出して表示部３に出力する。表示部３は車間距離に応じた位置に前車表示３ａを表示し、固定位置に車間の数値表示３ｂを表示する。   The vehicle information analysis unit 1 calculates an image signal to be displayed on the display unit 3 based on the input preceding inter-vehicle distance data and outputs the image signal to the display unit 3. The display unit 3 displays a front vehicle display 3a at a position corresponding to the inter-vehicle distance, and displays an inter-vehicle numerical value display 3b at a fixed position.

上記した従来の車間距離表示装置では先行車との間が危険な程近距離となったときに、車間距離数値をそのまま表示していると運転者や同乗者がその車間距離数値を確認したときに、不安な気持ちを抱くことになり、その数値に気を取られて安全運行が妨げられることになるという問題があった。また、先行車が近距離となった場合表示部３の前車表示３ａが図３において下方に移動して数値表示３ｂと重なることがあった。   When the above-mentioned conventional inter-vehicle distance display device is dangerously close to the preceding vehicle and the inter-vehicle distance value is displayed as it is, the driver or passenger confirms the inter-vehicle distance value. In addition, there was a problem that the feeling of anxiety was felt and the safe operation was hindered by being distracted by the numerical value. Further, when the preceding vehicle becomes a short distance, the front vehicle display 3a of the display unit 3 may move downward in FIG. 3 and overlap the numerical value display 3b.

また、信号待ち等で停車している場合、車間距離数値を監視することにより前車との接触を避けることは測定誤差等から略不可能であり、実情は前車を見ながら車両を徐々に進めていることから車間距離数値は無意味なものとなつていた。   In addition, when stopping at a signal, etc., it is almost impossible to avoid contact with the previous vehicle by monitoring the distance between the vehicles due to measurement errors, etc. Because of the progress, the inter-vehicle distance numbers were meaningless.

特開平１０−９６７７６号公報に提案された車間距離の表示装置は、測定された先行車両の車間距離と、自車両の走行状態から認識した先行車両との安全車間距離とに基づき、先行車両との追突の危険度に応じた赤、黄、緑等の色彩の車間領域表示する構成となっている。   The inter-vehicle distance display device proposed in Japanese Patent Laid-Open No. 10-96776 is based on the measured inter-vehicle distance of the preceding vehicle and the safe inter-vehicle distance from the preceding vehicle recognized from the traveling state of the host vehicle. The inter-vehicle area is displayed in colors such as red, yellow, and green according to the risk of rear-end collision.

上記特開平１０−９６７７６号公報に提案された車間距離の表示装置では、車間距離の絶対値を表示しない。しかしながらある程度運転を経験すると、安全な車間距離を夫々の運転者が経験で認識しているものであり、そのような運転者は車間距離を知ることにより安心して運転できるが、車間距離を数値で知ることができないと安心して運転ができないという問題があった。
特開平１０−９６７７６号公報、段落００１０〜００１６、図１、図４、図５、図６ The inter-vehicle distance display device proposed in the above-mentioned Japanese Patent Application Laid-Open No. 10-96776 does not display the absolute value of the inter-vehicle distance. However, if you experience a certain amount of driving, each driver recognizes the safe inter-vehicle distance by experience, and such a driver can drive with confidence by knowing the inter-vehicle distance, but the inter-vehicle distance can be expressed numerically. There was a problem that if you could not know, you could not drive safely.
JP-A-10-96776, paragraphs 0010 to 0016, FIG. 1, FIG. 4, FIG. 5, FIG.

この発明は上記した点に鑑みてなされたものであって、その目的とするところは、必要な車間距離は数値表示し、不必要または運転者や同乗者が不安を抱かせる車間距離数値をしない車間距離表示装置を提供することにある。   The present invention has been made in view of the above points, and the object of the present invention is to display the necessary inter-vehicle distance numerically, and not to display the inter-vehicle distance numerical value that is unnecessary or uneasy for the driver or passengers. The object is to provide an inter-vehicle distance display device.

この発明の車間距離表示装置は、自車両の前方に存在する先行車両と自車両との車間距離を測定する先行車車間距検出部と、前記先行車車間距検出部からの信号が入力され映像信号を算出する車両情報解析部と、前記車両情報解析部からの信号が入力され先行車両と自車両との車間距離に応じた位置に先行車両を表示し、さらに、前記車間距離を数値表示する表示部とを備えた車間距離表示装置において、前記車間距離が所定値以下であるときは前記数値表示を行わないように構成したものである。   The inter-vehicle distance display device according to the present invention includes a preceding vehicle inter-vehicle distance detecting unit that measures the inter-vehicle distance between the preceding vehicle existing in front of the own vehicle and the own vehicle, and a signal input from the preceding vehicle inter-vehicle distance detecting unit. A vehicle information analysis unit that calculates a signal, a signal from the vehicle information analysis unit is input, the preceding vehicle is displayed at a position corresponding to the inter-vehicle distance between the preceding vehicle and the host vehicle, and the inter-vehicle distance is numerically displayed In the inter-vehicle distance display device provided with a display unit, the numerical display is not performed when the inter-vehicle distance is equal to or less than a predetermined value.

また、前記車間距離表示装置において、前記車両情報解析部に自車速度検出部からの信号を入力し、自車速度が０または所定値以下のときは前記数値表示を行わないように構成したものである。   Further, in the inter-vehicle distance display device, a signal from the own vehicle speed detecting unit is input to the vehicle information analyzing unit, and the numerical value display is not performed when the own vehicle speed is 0 or less than a predetermined value. It is.

さらに、前記各車間距離表示装置において、前記数値表示を行う状態から前記数値表示を行わない状態とする閾値と前記数値表示を行わない状態から前記数値表示を行う状態とする閾値を異ならせ数値表示の点滅を生じしにくくしたものである。   Further, in each of the inter-vehicle distance display devices, a numerical value display is performed by changing a threshold value for changing the numerical value display state to a state in which the numerical value display is not performed and a threshold value for changing the numerical value display state to not be performed. This makes it difficult to blink.

この発明の車間距離表示装置によれば、必要な車間距離は数値表示し、不必要または運転者や同乗者が不安を抱かせる車間距離数値をしないので運転者が表示に煩わされることがなく、安心して車両を走行させることができる。   According to the inter-vehicle distance display device of the present invention, the necessary inter-vehicle distance is displayed as a numerical value, and the driver is not bothered by the display because the inter-vehicle distance value is not necessary or the driver or passengers are uneasy. The vehicle can be driven with peace of mind.

以下この発明を実施するための最良の形態を実施例に即して説明する。   The best mode for carrying out the present invention will be described below with reference to examples.

図１はこの発明の実施例１である車間距離表示装置を示すブロック図である。図１に示す２は車両の中央より前方の左右配置された２つのカメラにより三角測量により先行車両との車間距離を計測してそのデータを車両情報解析部１に出力する先行車間距離検出部である。車両情報解析部１には速度計等の自車速度検出部４から速度信号も入力される。   FIG. 1 is a block diagram showing an inter-vehicle distance display device that is Embodiment 1 of the present invention. Reference numeral 2 shown in FIG. 1 is a preceding inter-vehicle distance detection unit that measures the inter-vehicle distance from the preceding vehicle by triangulation using two cameras arranged in front of the center of the vehicle and outputs the data to the vehicle information analysis unit 1. is there. The vehicle information analysis unit 1 also receives a speed signal from the own vehicle speed detection unit 4 such as a speedometer.

車両情報解析部１は入力された先行車間距離のデータおよび速度信号により表示部３に表示する画像信号を算出して表示部３に出力する。表示部３は車間距離に応じた位置に前車表示３ａを表示し、固定位置に車間の数値表示３ｂを表示する。   The vehicle information analysis unit 1 calculates an image signal to be displayed on the display unit 3 based on the input preceding inter-vehicle distance data and the speed signal, and outputs the image signal to the display unit 3. The display unit 3 displays a front vehicle display 3a at a position corresponding to the inter-vehicle distance, and displays an inter-vehicle numerical value display 3b at a fixed position.

図２により上記車間距離表示装置の表示処理の動作を説明する。図２に示すルーチンは定期的に実行され、通常、表示部３に前車表示３ａおよび数値表示３ｂを表示するが、数値表示３ｂは表示されない場合がある。   The operation of the display process of the inter-vehicle distance display device will be described with reference to FIG. The routine shown in FIG. 2 is periodically executed, and usually the front vehicle display 3a and the numerical value display 3b are displayed on the display unit 3, but the numerical value display 3b may not be displayed.

このルーチンが実行されると、先ず、ステップＳ１において、先行車両との車間距離がメモリアドレスＡに記憶される。次に、ステップＳ２において、自車の車速データがメモリアドレスＢに記憶されてステップＳ３に移行する。   When this routine is executed, first, the inter-vehicle distance from the preceding vehicle is stored in the memory address A in step S1. Next, in step S2, the vehicle speed data of the own vehicle is stored in the memory address B, and the process proceeds to step S3.

ステップＳ３では、走行中（車速データ＞０）であるか停車中（車速データ＝０）であるかが判断され、走行中であればステップＳ４に移行し、停車中であればステップＳ５に移行する。ステップＳ５では停車中処理が行われ、この場合前車表示３ａのみ表示し数値表示３ｂは表示しない。   In step S3, it is determined whether the vehicle is traveling (vehicle speed data> 0) or stopped (vehicle speed data = 0). If the vehicle is traveling, the process proceeds to step S4. If the vehicle is stopped, the process proceeds to step S5. To do. In step S5, processing during stopping is performed. In this case, only the front vehicle display 3a is displayed and the numerical value display 3b is not displayed.

ステップＳ４では車間距離（Ａ値）の範囲が判断され、Ａ値が１０ｍと１２０ｍの間であれば、ステップＳ６に移行し、Ａ値が１０ｍ以下であればステップＳ７に移行し、Ａ値が１２０ｍ以上またはＡ値が得られない場合はステップＳ８に移行する。   In step S4, the range of the inter-vehicle distance (A value) is determined. If the A value is between 10 m and 120 m, the process proceeds to step S6. If the A value is 10 m or less, the process proceeds to step S7. When 120 m or more or the A value cannot be obtained, the process proceeds to step S8.

ステップＳ６では通常処理が行われ、表示部３の車間距離に応じた位置に前車表示３ａを表示し、固定位置に車間の数値表示３ｂを表示する。ステップＳ７では近距離時処理が行われ、表示部３の車間距離に応じた位置に前車表示３ａを表示し、数値表示は表示しない。ステップＳ８ではエラー処理が行われ前車表示３ａおよび数値表示３ｂを共に表示しない。   In step S6, normal processing is performed, the front vehicle display 3a is displayed at a position corresponding to the inter-vehicle distance on the display unit 3, and the numerical value display 3b between the vehicles is displayed at a fixed position. In step S7, near distance processing is performed, the front vehicle display 3a is displayed at a position corresponding to the inter-vehicle distance on the display unit 3, and the numerical display is not displayed. In step S8, error processing is performed and neither the front vehicle display 3a nor the numerical value display 3b is displayed.

上記処理により安全車間距離で走行するときは数値表示３ｂを時々確認することで夫々の運転者に合った車間距離で安心して走行することができる。そして、数値表示３ｂが消えることにより先行車に近付きすぎたことを知り、数値表示３ｂが表示されるまで車間を開けることができる。そのとき数値を読み取る必要がなく、気を取られて事故を起こすことがない。   When traveling at a safe inter-vehicle distance by the above processing, it is possible to travel safely at an inter-vehicle distance suitable for each driver by checking the numerical display 3b from time to time. Then, when the numerical value display 3b disappears, it is known that the vehicle is too close to the preceding vehicle, and it is possible to open the vehicle until the numerical value display 3b is displayed. At that time, there is no need to read the numerical value, and you will not be distracted by the accident.

また、停車中に無意味な数値表示３ｂが表示されず、煩わしくない。さらに、先行車に近付きすぎたときに前車表示３ａと数値表示３ｂが重なることがない。   Further, the meaningless numerical value display 3b is not displayed while the vehicle is stopped, and it is not troublesome. Furthermore, the front vehicle display 3a and the numerical value display 3b do not overlap when the vehicle approaches the preceding vehicle too much.

実施例は以上のように構成されているが、停車と徐行を繰り返す場合に数値表示しないようにしてもよい。その場合にはステップＳ３での走行中か否かの判断の車速度を０より僅かに大きい数値で判断する。また、車間距離の閾値は１０ｍや１２０ｍ以外の数値としてもよい。   Although the embodiment is configured as described above, numerical values may not be displayed when stopping and slowing down are repeated. In that case, the vehicle speed for determining whether or not the vehicle is traveling in step S3 is determined by a numerical value slightly larger than zero. Further, the threshold value of the inter-vehicle distance may be a numerical value other than 10 m or 120 m.

また、数値表示３ｂの表示・非表示が繰り返されるのを避けるため、表示となる閾値と非表示となる閾値を異ならせてもよい。その場合は表示状態（ステップＳ６）である場合と非表示状態（ステップＳ７、Ｓ８）とで異なる閾値を設定する。   Further, in order to avoid repeated display / non-display of the numerical value display 3b, the display threshold value and the non-display threshold value may be different. In that case, different threshold values are set for the display state (step S6) and the non-display state (steps S7, S8).

さらに、先行車に近付きすぎて数値表示が消えるときに音声により知らせるようにしていもよい。   Furthermore, when the numerical value display disappears too close to the preceding vehicle, it may be notified by voice.

この発明の実施例１の車間距離表示装置を示すブロック図である。It is a block diagram which shows the inter-vehicle distance display apparatus of Example 1 of this invention. 同車間距離表示装置の動作を示すフローチャートである。It is a flowchart which shows operation | movement of the same inter-vehicle distance display apparatus. 従来の車間距離表示装置の例を示すブロック図である。It is a block diagram which shows the example of the conventional inter-vehicle distance display apparatus.

符号の説明Explanation of symbols

１ 車両情報解析部
２ 先行車車間距検出部
３ 表示部、３ａ 前車表示、３ｂ 数値表示
４ 自車速度検出部 DESCRIPTION OF SYMBOLS 1 Vehicle information analysis part 2 Leading vehicle inter-vehicle distance detection part 3 Display part, 3a Front vehicle display, 3b Numerical display 4 Own vehicle speed detection part

Claims (3)

自車両の前方に存在する先行車両と自車両との車間距離を測定する先行車車間距検出部と、前記先行車車間距検出部からの信号が入力され映像信号を算出する車両情報解析部と、前記車両情報解析部からの信号が入力され先行車両と自車両との車間距離に応じた位置に先行車両を表示し、さらに、前記車間距離を数値表示する表示部とを備えた車間距離表示装置において、前記車間距離が所定値以下であるときは前記数値表示を行わないように構成した車間距離表示装置。 A preceding vehicle inter-vehicle distance detection unit that measures the inter-vehicle distance between the preceding vehicle existing in front of the own vehicle and the own vehicle, and a vehicle information analysis unit that receives the signal from the preceding vehicle inter-vehicle distance detection unit and calculates a video signal; A vehicle distance display comprising: a signal input from the vehicle information analysis unit, a preceding vehicle displayed at a position corresponding to a distance between the preceding vehicle and the host vehicle, and a display unit for numerically displaying the distance between the vehicles In the apparatus, an inter-vehicle distance display device configured not to perform the numerical display when the inter-vehicle distance is equal to or less than a predetermined value. 前記車両情報解析部に自車速度検出部からの信号を入力し、自車速度が０または所定値以下のときは前記数値表示を行わないように構成した請求項１の車間距離表示装置。 The inter-vehicle distance display device according to claim 1, wherein a signal from the vehicle speed detection unit is input to the vehicle information analysis unit, and the numerical display is not performed when the vehicle speed is 0 or less than a predetermined value. 前記数値表示を行う状態から前記数値表示を行わない状態とする閾値と前記数値表示を行わない状態から前記数値表示を行う状態とする閾値を異ならせ数値表示の点滅を生じしにくくした請求項１または２の車間距離表示装置。 The threshold value for changing the numerical value display state from the state where the numerical value display is not performed to the threshold value for changing the numerical value display state from the state where the numerical value display is not performed to make the numerical value display less likely to blink. Or a distance between two vehicles.
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