JPH10326505A - Apparatus for controlling irradiation direction of lighting tool - Google Patents

Apparatus for controlling irradiation direction of lighting tool

Info

Publication number
JPH10326505A
JPH10326505A JP9135124A JP13512497A JPH10326505A JP H10326505 A JPH10326505 A JP H10326505A JP 9135124 A JP9135124 A JP 9135124A JP 13512497 A JP13512497 A JP 13512497A JP H10326505 A JPH10326505 A JP H10326505A
Authority
JP
Japan
Prior art keywords
stepping motor
rotation speed
command
signal
lamp
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
Application number
JP9135124A
Other languages
Japanese (ja)
Other versions
JP3128618B2 (en
Inventor
Makoto Izawa
誠 伊澤
Masaaki Ishikawa
雅章 石川
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.)
Koito Manufacturing Co Ltd
Original Assignee
Koito Manufacturing 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=15144390&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JPH10326505(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Koito Manufacturing Co Ltd filed Critical Koito Manufacturing Co Ltd
Priority to JP09135124A priority Critical patent/JP3128618B2/en
Priority to GB9810896A priority patent/GB2325757B/en
Priority to DE1998123487 priority patent/DE19823487C2/en
Publication of JPH10326505A publication Critical patent/JPH10326505A/en
Application granted granted Critical
Publication of JP3128618B2 publication Critical patent/JP3128618B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/06—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle
    • B60Q1/08—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle automatically
    • B60Q1/10—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle automatically due to vehicle inclination, e.g. due to load distribution
    • B60Q1/115—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle automatically due to vehicle inclination, e.g. due to load distribution by electric means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2200/00—Special features or arrangements of vehicle headlamps
    • B60Q2200/30—Special arrangements for adjusting headlamps, e.g. means for transmitting the movements for adjusting the lamps
    • B60Q2200/38—Automatic calibration of motor-driven means for adjusting headlamps, i.e. when switching on the headlamps, not during mounting at factories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/10—Indexing codes relating to particular vehicle conditions
    • B60Q2300/13—Attitude of the vehicle body
    • B60Q2300/132—Pitch

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Control Of Stepping Motors (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

PROBLEM TO BE SOLVED: To accurately and speedily determine an initial position of a stepping motor in an irradiation control device for a lighting tool using the stepping motor. SOLUTION: In an irradiation direction control device 1, a driver 4 for directing an irradiation direction of a lighting tool 5 toward a desired direction comprises a stepping motor 6 and a drive mechanism 7 driven by the motor 6. A rotating angle range of the stepping motor 6 depends upon a movable range of the drive mechanism 7. When an instructing device 2 sends, to a controller 3, a command signal for determining an initial position of the driver 4 after the operation of the control device 1, the controller 3 sends, to the stepping motor 6, a control signal inclusive of an angular command beyond the rotating angle range corresponding to the movable range of the drive mechanism 7 and a speed command for rotating the stepping motor 6 at a first rotating speed N1 at that time. Thereafter, the controller 3 sends, to the stepping motor 6, a control signal for rotating the stepping motor 6 by the predetermined number of steps at a second rotating speed N2 (lower than the first rotating speed N1), thereby reducing a vibration width generated when the drive mechanism 7 reaches a limit position within the movable range.

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、灯具の照射方向を
所望の方向に向けるための駆動源にステッピングモータ
を用いた灯具の照射方向制御装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illumination direction control device for a lamp using a stepping motor as a drive source for directing the illumination direction of the lamp to a desired direction.

【０００２】[0002]

【従来の技術】車輌に付設された灯具の照射方向を手動
操作により若しくは自動的に変化させることができるよ
うした装置が知られており、前者の例としては積載条件
や乗車条件の変化に応じて車内の操作スイッチを用いて
灯具の照射方向を調整する、所謂レベリング装置が知ら
れており、また、後者の例としては、車輌の姿勢変化に
よって車輌に付設された灯具の照射光の向きが一定しな
くなるのを防止するために、車輌の走行姿勢の変化に対
して、当該変化を打ち消すように灯具の照射方向を常時
補正する装置（所謂オートレベリング装置）が知られて
いる。2. Description of the Related Art There is known a device capable of changing the irradiation direction of a lamp attached to a vehicle by manual operation or automatically, and as the former example, it responds to changes in loading conditions and riding conditions. A so-called leveling device, which adjusts the direction of illumination of a lamp using an operation switch in the vehicle, is known.As an example of the latter, the direction of illumination of a lamp attached to the vehicle due to a change in the attitude of the vehicle is known. There is known a device (so-called auto-leveling device) that constantly corrects the irradiation direction of a lamp so as to cancel the change in the running posture of a vehicle in order to prevent the vehicle from becoming unstable.

【０００３】この種の装置では、灯具の照射方向をある
角度範囲内で変化させるために何等かの駆動手段を有し
ており、例えば、ステッピングモータを用いたアクチュ
エータによって反射鏡の傾動角を制御するようにした装
置であって、コスト低減の観点あるいは装置に大きな衝
撃が加わった場合に位置ズレが起きる（モータに給電し
ていないとローターが動き易いため。）といった理由か
ら位置検出手段をあえて付設しないように構成された装
置がある。This type of apparatus has some driving means for changing the irradiation direction of the lamp within a certain angle range. For example, the tilt angle of the reflecting mirror is controlled by an actuator using a stepping motor. The position detecting means is deliberately used from the viewpoint of cost reduction or a position shift when a large impact is applied to the device (because the rotor is likely to move unless power is supplied to the motor). Some devices are configured not to be attached.

【０００４】[0004]

【発明が解決しようとする課題】ところで、上記した装
置にあっては、動作開始時にステッピングモータのロー
ター位置が不定であるため、原点位置を検出するために
該モータを所定の方向に回転させて、その回転が停止す
る位置、つまりアクチュエータの可動範囲の上限位置若
しくは下限位置において位置出し（初期位置の決定）を
するための初期動作が１回だけ行われる。By the way, in the above-described apparatus, since the rotor position of the stepping motor is not fixed at the start of the operation, the motor is rotated in a predetermined direction to detect the origin position. The initial operation for positioning (determining the initial position) is performed only once at the position where the rotation stops, that is, at the upper limit position or lower limit position of the movable range of the actuator.

【０００５】その際、アクチュエータのフルストローク
分（つまり上限位置と下限位置との間の距離差）に相当
する位相角でもって、ステッピングモータを灯具の照射
方向制御時における回転速度と同程度の速度で回転させ
たのでは、限界位置（上限位置若しくは下限位置）にお
いて正確かつ短時間に位置出しを行うのが難かしいとい
う問題がある。At this time, the phase angle corresponding to the full stroke of the actuator (ie, the distance difference between the upper limit position and the lower limit position) causes the stepping motor to rotate at the same speed as the rotation speed when controlling the irradiation direction of the lamp. If the rotation is performed at the limit position, there is a problem that it is difficult to accurately and quickly locate the position at the limit position (the upper limit position or the lower limit position).

【０００６】例えば、図１１に示すように、横軸に装置
の動作開始時点を起点とする時間ｔをとり、縦軸に位置
ｘ（つまり、ステッピングモータの回転角又はアクチュ
エータの移動距離）をとって初期動作の様子を概念的に
示した場合に、アクチュエータの可動部がｔ＝０でｘ＝
ｘ０に位置している状態から、矢印Ｌで示す速度をもっ
てステッピングモータを回転させたときに、該モータは
位置座標の原点０（例えば、アクチュエータの可動範囲
の下限点）を越えて回転することが許されないため、図
示するように振動してリバウンドが発生する。その振動
の幅を「Δｘ」とすると、ステッピングモータの回転停
止時において理想的にはΔｘ＝０となることが望ましい
が、上記のような方法ではΔｘの値が大きいため正確な
原点位置を認識することが困難である。For example, as shown in FIG. 11, the horizontal axis represents time t starting from the start of operation of the apparatus, and the vertical axis represents position x (ie, the rotation angle of the stepping motor or the moving distance of the actuator). When the state of the initial operation is conceptually shown, the movable part of the actuator is t = 0 and x =
When the stepping motor is rotated at the speed indicated by the arrow L from the state of being located at x0, the motor may rotate beyond the origin 0 of the position coordinates (for example, the lower limit of the movable range of the actuator). Since it is not allowed, vibration occurs and rebound occurs as shown. Assuming that the width of the vibration is “Δx”, it is desirable that Δx = 0 ideally when the rotation of the stepping motor is stopped. However, in the above method, since the value of Δx is large, an accurate origin position is recognized. Is difficult to do.

【０００７】そこで、本発明は、ステッピングモータを
用いた灯具の照射制御装置において、モータの初期位置
の決定を正確かつ迅速に行うことを課題とする。Accordingly, an object of the present invention is to determine an initial position of a motor accurately and quickly in a lighting control device for a lamp using a stepping motor.

【０００８】[0008]

【課題を解決するための手段】本発明は上記した課題を
解決するために、装置の作動後に駆動手段の初期位置を
決定するための指令信号を指令手段が制御手段に対して
送出した場合に、駆動機構の可動範囲に相当する回転角
範囲を越える角度指令及びその際にステッピングモータ
を第１の回転速度でもって回転させるための速度指令を
含む制御信号を、制御手段がステッピングモータに送出
した後、上記第１の回転速度より低速とされる第２の回
転速度をもって所定のステップ数だけステッピングモー
タを回転させるための制御信号を制御手段がステッピン
グモータに送出するようにしたものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a case where a command signal for determining an initial position of a driving means is transmitted to a control means after the operation of the apparatus. The control means sends to the stepping motor a control signal including an angle command exceeding a rotation angle range corresponding to the movable range of the drive mechanism and a speed command for rotating the stepping motor at the first rotation speed. Then, the control means sends a control signal to the stepping motor to rotate the stepping motor by a predetermined number of steps at a second rotation speed lower than the first rotation speed.

【０００９】従って、本発明によれば、駆動手段の初期
位置の決定にあたって、先ず、ステッピングモータを第
１の回転速度で回転させて、該ステッピングモータがそ
れ以上の角度をもって回転しなくなってから、より低速
の第２の回転速度で回転させているので、振動によるリ
バウンドの幅を小さくすることができる。Therefore, according to the present invention, in determining the initial position of the driving means, first, the stepping motor is rotated at the first rotation speed, and after the stepping motor stops rotating at an angle larger than that, Since the rotation is performed at the lower second rotation speed, the width of the rebound due to the vibration can be reduced.

【００１０】[0010]

【発明の実施の形態】図１は、本発明に係る装置の基本
構成を示すものである。FIG. 1 shows a basic configuration of an apparatus according to the present invention.

【００１１】照射方向制御装置１は、指令手段２、制御
手段３、駆動手段４を備えており、制御手段３から駆動
手段４を介して照射方向が制御される灯具５には、例え
ば、車輌用灯具の場合、前照灯（狭義のヘッドランプの
他、フォッグランプ、コーナリングランプ等が含まれ
る。）が挙げられる。The irradiation direction control device 1 includes a commanding unit 2, a control unit 3, and a driving unit 4. A lamp 5 whose irradiation direction is controlled from the control unit 3 via the driving unit 4 includes, for example, a vehicle. In the case of a lamp, a headlamp (a fog lamp, a cornering lamp, and the like are included in addition to a headlamp in a narrow sense).

【００１２】駆動手段４は灯具５の照射方向を所望の方
向に向けるために設けられており、ステッピングモータ
６と該ステッピングモータ６によって駆動される駆動機
構７とを備えている。そして、駆動機構７の可動範囲に
よってステッピングモータ６の回転角範囲が制限される
ように構成されている。The driving means 4 is provided to direct the irradiation direction of the lamp 5 in a desired direction, and includes a stepping motor 6 and a driving mechanism 7 driven by the stepping motor 6. The rotation angle range of the stepping motor 6 is limited by the movable range of the drive mechanism 7.

【００１３】指令手段２は、装置１の作動後に駆動手段
４の初期位置を決定するための指令信号を制御手段３に
対して送出するものであり、制御手段３は当該指令信号
を受けると、先ず駆動機構７の可動範囲に相当する回転
角範囲を越える角度指令及びその際にステッピングモー
タ６を第１の回転速度（以下、これを「Ｎ１」と記
す。）で回転させるための速度指令を含む制御信号をス
テッピングモータ６に送出する。尚、指令手段２は、こ
の他、制御手段３に対して灯具５の照射方向を制御する
ために必要な信号（例えば、手動操作によって灯具の照
射方向を制御する場合にはその操作信号であり、また、
自動的に灯具の照射方向を制御する場合には、その基礎
となる検出信号（オートレベリング装置では車輌姿勢の
検出信号。）である。）を制御手段３に送出する。The command means 2 sends a command signal for determining the initial position of the drive means 4 to the control means 3 after the operation of the apparatus 1, and the control means 3 receives the command signal. First, an angle command exceeding a rotation angle range corresponding to the movable range of the drive mechanism 7 and a speed command for rotating the stepping motor 6 at a first rotation speed (hereinafter referred to as “N1”) at that time are issued. The control signal is transmitted to the stepping motor 6. The command means 2 is a signal necessary for controlling the irradiation direction of the lamp 5 to the control means 3 (for example, an operation signal when the irradiation direction of the lamp is controlled by manual operation). ,Also,
When the irradiation direction of the lamp is automatically controlled, it is a detection signal (a detection signal of a vehicle attitude in an auto-leveling device) which is a basis of the control. ) Is sent to the control means 3.

【００１４】そして、制御手段３はその後、第１の回転
速度Ｎ１より低速とされる第２の回転速度（以下、これ
を「Ｎ２」と記す。）をもって所定のステップ数だけス
テッピングモータ６を回転させるための制御信号をステ
ッピングモータ６に送出する。Then, the control means 3 rotates the stepping motor 6 by a predetermined number of steps at a second rotation speed (hereinafter referred to as "N2") which is lower than the first rotation speed N1. A control signal for causing the stepping motor 6 is sent.

【００１５】図２及び図３は初期動作時において制御手
段３からステッピングモータ６に送出される回転速度指
令を概念的に示すものであり、横軸に時間ｔをとり、縦
軸に回転速度Ｎをとって速度指令の変化を示している。FIGS. 2 and 3 conceptually show a rotational speed command sent from the control means 3 to the stepping motor 6 during the initial operation. The horizontal axis represents time t, and the vertical axis represents the rotational speed N. Indicates the change of the speed command.

【００１６】図２に実線で示すグラフ線ｇ１は上記回転
速度Ｎ１、Ｎ２を一定値とした場合を示しており、０≦
ｔ≦ｔｃで示す期間中ステッピングモータ６の回転速度
Ｎ１はＮａに固定され、ｔｃ＜ｔ≦ｔｅの期間において
ステッピングモータ６の回転速度Ｎ２がＮａに比して充
分低い値Ｎｂ（＜＜Ｎａ）に変更される。尚、これに限
らず同図に１点鎖線のグラフ線ｇ２に示すように、回転
速度を複数の段階に亘って減速させるように制御を行う
こともできるが、初期動作を短時間で行うためにはグラ
フ線ｇ１のように少数の段階で切り替えることが好まし
い。A graph line g1 shown by a solid line in FIG. 2 shows a case where the rotational speeds N1 and N2 are set to constant values, and 0 ≦
During the period t ≦ tc, the rotation speed N1 of the stepping motor 6 is fixed at Na, and during the period tc <t ≦ te, the rotation speed N2 of the stepping motor 6 is a value Nb (<< Na) that is sufficiently lower than Na. Is changed to It is to be noted that the present invention is not limited to this, and as shown by a one-dot chain line graph line g2 in FIG. Is preferably switched in a small number of steps as shown by a graph line g1.

【００１７】図３は回転速度を連続的に減速させるよう
にした例を示しており、同図にグラフ線ｇ３で示す制御
では、第１の回転速度Ｎ１を右下がりに傾斜した線分ｇ
３ａで示すように直線的に減速させた後、期間ｔｃ＜ｔ
≦ｔｅにおける第２の回転速度Ｎ２については、線分ｇ
３ａより傾きの小さい線分ｇ３ｂに示すようにゆっくり
と減速させている。尚、このような直線的な減速制御に
限らず、同図に２点鎖線で示すグラフ線ｇ４のように曲
線的な減速制御を行うことも可能である。FIG. 3 shows an example in which the rotation speed is continuously reduced. In the control shown by a graph line g3 in FIG. 3, a line segment g in which the first rotation speed N1 is inclined downward to the right.
After the linear deceleration as shown by 3a, the period tc <t
For the second rotation speed N2 at ≦ te, the line segment g
As shown by a line segment g3b having a smaller inclination than 3a, the speed is slowly reduced. It is to be noted that the present invention is not limited to such linear deceleration control, and it is also possible to perform curvilinear deceleration control as shown by a two-dot chain line in FIG.

【００１８】以上のように、初期動作時におけるステッ
ピングモータ６の減速制御については、Ｎ１又はＮ２が
一定値であるか、あるいは、Ｎ１又はＮ２が時間経過に
つれて段階的若しくは連続的に減速される。そして、ｔ
ｅの時点については制御手段３により時間指令として規
定することもできるが、所定のステップ数として規定す
る（即ち、ｔｅの時点は回転速度に依存する。）と、原
点の位置出しの精度をより高くすることができる。つま
り、期間ｔｃ＜ｔ≦ｔｅの初期において発生する駆動機
構７のリバウンドの最大幅は第１の回転速度Ｎ１によっ
てほぼ決定されるので、当該最大幅内においてステッピ
ングモータ６を第２の回転速度Ｎ２（リバウンドが生じ
ない速度）で回転させると、リバウンドの幅をより狭め
ることができる。As described above, in the deceleration control of the stepping motor 6 at the time of the initial operation, N1 or N2 is a constant value, or N1 or N2 is decelerated stepwise or continuously over time. And t
The time point e can be specified as a time command by the control means 3, but if it is specified as a predetermined number of steps (that is, the time point te depends on the rotation speed), the accuracy of the positioning of the origin can be improved. Can be higher. That is, since the maximum width of the rebound of the drive mechanism 7 that occurs in the initial period of the period tc <t ≦ te is substantially determined by the first rotation speed N1, the stepping motor 6 is controlled to operate at the second rotation speed N2 within the maximum width. When rotated at a speed that does not cause rebound, the width of the rebound can be further reduced.

【００１９】尚、駆動手段４による灯具５の照射方向の
変更方法については、駆動手段４により灯具全体を傾動
させることでその照射方向を変化させる方法の他、灯具
の構成部材の一部の駆動制御を行う方法がある。例え
ば、駆動手段４によって反射鏡を鉛直面内で傾動させる
ことで反射光の向きを変化させる方法や、駆動手段４に
よってレンズを傾動させることでレンズを通過した照射
光の向きを変化させる方法等を挙げることができる。こ
の他、反射鏡やレンズについてはその全体を傾動させる
代わりに、それらの一部分の位置制御を行うことによっ
て照射光の主要部を所望の方向に変化させるようにして
も良いし、また、シェードを駆動手段４によって所定の
方向に移動させることによって、灯具の配光パターンに
おける明暗境界を上下に変化させる方法や、反射鏡及び
光源、レンズ及び反射鏡、あるいはレンズ及びシェード
等を組み合わせてこれらを駆動手段４により一緒に移動
することによって照射光の向きを上下方向に変化させる
方法等、灯具の光学的な構成部材の組み合わせの如何に
応じて各種の実施形態が可能である。The method of changing the irradiation direction of the lamp 5 by the driving means 4 includes a method of changing the irradiation direction by tilting the entire lamp by the driving means 4 and a method of driving a part of the components of the lamp. There is a way to control. For example, a method of changing the direction of reflected light by tilting the reflecting mirror in the vertical plane by the driving means 4, a method of changing the direction of irradiation light passing through the lens by tilting the lens by the driving means 4, and the like. Can be mentioned. In addition, instead of tilting the entire reflecting mirror or lens, the main part of the irradiation light may be changed in a desired direction by controlling the position of a part thereof, or the shade may be changed. By moving the light in a predetermined direction by the driving means 4 to change the light / dark boundary in the light distribution pattern of the lamp up and down, or by driving a combination of a reflecting mirror and a light source, a lens and a reflecting mirror, or a lens and a shade. Various embodiments are possible depending on the combination of the optical components of the lamp, such as a method of changing the direction of irradiation light in the vertical direction by moving together with the means 4.

【００２０】[0020]

【実施例】図４乃至図１０は本発明を車輌用灯具の照射
方向制御装置に適用した実施例を示すものである。4 to 10 show an embodiment in which the present invention is applied to an irradiation direction control device for a vehicle lamp.

【００２１】装置８は車輌の姿勢変化に自動的に追従し
て灯具の照射方向を補正するオートレベリング装置であ
り、図４に示すように、制御手段３の機能を実現するた
めにコンピュータを内蔵するＥＣＵ（電子制御ユニッ
ト）９を有しており、該ＥＣＵ９への入力信号は、車輌
前後の車軸部にそれぞれ設けられた車高センサー１０、
１１による検出信号、ヘッドランプスイッチ１２による
点灯指示信号（以下、「ＳＷ」と記す。）、エンジンの
始動信号であるイグニッション信号（以下、「Ｉｇ」と
記す。）、車速センサー１３による検出信号である。The device 8 is an auto-leveling device for automatically following the change in the attitude of the vehicle to correct the irradiation direction of the lamp. As shown in FIG. (Electronic Control Unit) 9 which performs an input signal to the ECU 9, a vehicle height sensor 10 provided on each of axle parts before and after the vehicle,
11, a lighting instruction signal from the headlamp switch 12 (hereinafter, referred to as "SW"), an ignition signal as an engine start signal (hereinafter, referred to as "Ig"), and a detection signal from the vehicle speed sensor 13. is there.

【００２２】車高センサー１０、１１は車輌姿勢を検出
する手段であり、静止及び／又は運動中の車輌姿勢（車
輌の進行方向における上下の傾斜を含む。）を検出する
ために設けられ、例えば、車軸のサスペンションの伸縮
量を検出する方法や、車高センサーと地面との間の距離
を超音波やレーザー光等の検出波を使って計測する方
法、あるいはジャイロセンサーを用いる方法（二輪車輌
等に使用される。）等を用いることができる。The vehicle height sensors 10 and 11 are means for detecting the vehicle posture, and are provided for detecting the vehicle posture during stationary and / or motion (including the vertical inclination in the traveling direction of the vehicle). , A method of detecting the amount of expansion and contraction of the suspension of the axle, a method of measuring the distance between the vehicle height sensor and the ground by using a detection wave such as an ultrasonic wave or a laser beam, or a method of using a gyro sensor (such as a motorcycle). Is used.) And the like.

【００２３】ＥＣＵ９の出力する補正信号は、車輌前部
の左右に設けられた灯具の照射方向をそれぞれ制御する
駆動部１４、１４′に送出される。尚、駆動部１４、１
４′には、駆動源であるステッピングモータ１４ａ、１
４′ａや、それらのモータ駆動回路１４ｂ、１４′ｂが
設けられている。尚、ステッピングモータ１４ａ、１
４′ａの回転によって、例えば、灯具１５、１５′内に
設けられたアクチュエータ１４ｃ、１４′ｃの摺動軸が
車輌の前後方向に移動され、これによって反射鏡が鉛直
面内において傾動されることで灯具内の反射鏡の光軸の
向きが変更されて灯具１５、１５′の照射方向がそれぞ
れ制御される。The correction signal output from the ECU 9 is sent to driving units 14 and 14 'for controlling the irradiation directions of the lamps provided on the left and right of the front part of the vehicle. The driving units 14, 1
4 'includes stepping motors 14a, 1
4'a and their motor drive circuits 14b and 14'b are provided. Note that the stepping motors 14a, 1
By the rotation of 4'a, for example, the sliding axes of the actuators 14c and 14'c provided in the lamps 15 and 15 'are moved in the front-rear direction of the vehicle, whereby the reflector is tilted in the vertical plane. As a result, the direction of the optical axis of the reflecting mirror in the lamp is changed, and the irradiation directions of the lamps 15 and 15 'are respectively controlled.

【００２４】図５は要部の構成例を示すものであり、制
御中枢であるコンピュータ１６に電源供給を行う電源回
路１７には、ＳＷ信号及びＩｇ信号がダイオード１８、
１８′によって形成されるＯＲ（和）回路１９を介して
入力される（このＯＲ信号が上記した指令手段２による
信号に相当する。）。つまり、この場合のＳＷ信号は点
灯指示時にＨ（ハイ）レベル信号、消灯指示時にＬ（ロ
ー）レベル信号とされ、また、Ｉｇ信号はエンジン始動
時にＨレベル信号とされ、それ以外の時にＬレベル信号
とされる。FIG. 5 shows an example of the configuration of a main part. A power supply circuit 17 for supplying power to a computer 16 which is a control center is provided with a diode 18 and an SW signal and an Ig signal.
The signal is input through an OR (sum) circuit 19 formed by 18 '(this OR signal corresponds to the signal from the command means 2 described above). In other words, the SW signal in this case is an H (high) level signal when instructing to light, an L (low) level signal when instructing to extinguish, and the Ig signal is an H level signal when the engine is started. Signal.

【００２５】電源回路１７はＳＷ信号又はＩｇ信号がＨ
レベル信号の場合にコンピュータ１６への電源供給を行
うように構成されている。The power supply circuit 17 outputs an H signal when the SW signal or the Ig signal is H.
The power supply is supplied to the computer 16 in the case of the level signal.

【００２６】また、ダイオード２０、２０′によって得
られるＳＷ信号とＩｇ信号とのＯＲ信号がステッピング
モータ１４ａのコイル２１、２１、・・・への電源電圧
として送出される。尚、モータ駆動回路１４ｂはステッ
ピングモータ１４ａの各相コイル２１を直接駆動する半
導体スイッチ素子やダンパー等を有している。The OR signal of the SW signal and the Ig signal obtained by the diodes 20, 20 'is sent out as a power supply voltage to the coils 21, 21,... Of the stepping motor 14a. Note that the motor drive circuit 14b has a semiconductor switch element, a damper, and the like that directly drives each phase coil 21 of the stepping motor 14a.

【００２７】つまり、この回路ではＳＷ信号又はＩｇ信
号がＨレベル信号の場合に電源回路１７からコンピュー
タ１６への電源供給及びステッピングモータ１４ａへの
電源供給が行われ、その際、コンピュータ１６による初
期プログラムの実行によってモータ駆動回路１４ｂを介
してステッピングモータ１４ａによるアクチュエータ１
４ｃのフルストローク駆動が最初に一回だけ行われて原
点の位置出しが行われる。That is, in this circuit, when the SW signal or the Ig signal is an H level signal, the power supply from the power supply circuit 17 to the computer 16 and the power supply to the stepping motor 14a are performed. Of the stepping motor 14a via the motor drive circuit 14b
The full-stroke drive 4c is performed only once at first, and the origin is located.

【００２８】図６は初期動作に係る制御手順の一例を示
すフローチャート図であり、装置の動作が上記したＯＲ
信号によって指示されると、Ｓ１においてステッピング
モータ１４ａを、所定の方向（灯具又は反射鏡の光軸を
水平面に対して下向きに向ける方向）に向けて、アクチ
ュエータ１４ｃのフルストローク分に相当する回転角
（位相角）をもって回転速度Ｎ１で回転させる。FIG. 6 is a flowchart showing an example of a control procedure relating to the initial operation.
When instructed by the signal, in step S1, the stepping motor 14a is turned in a predetermined direction (the direction in which the optical axis of the lamp or the reflecting mirror is directed downward with respect to the horizontal plane), and the rotation angle corresponding to the full stroke of the actuator 14c. (Phase angle) and rotate at the rotation speed N1.

【００２９】そして、Ｓ２では上記Ｓ１の回転指示が終
了したか否か、つまり、アクチュエータ１４ｃに係るフ
ルストローク分の駆動が終了したか否かを判断し、終了
すれば次のＳ３に進み、終了していなければＳ１に戻
る。In S2, it is determined whether or not the rotation instruction in S1 has been completed, that is, whether or not the drive for the full stroke of the actuator 14c has been completed. If not, the process returns to S1.

【００３０】アクチュエータ１４ｃがその可動範囲の限
界位置に達した場合にはリバウンドを起こすため、Ｓ３
ではリバウンドを起さない程低速値に規定された回転速
度Ｎ２をもってステッピングモータ１４ａを回転させる
（パルスレートを低い周波数に規定する。）とともに、
回転のステップ数を所定値（これを「ＴＳ」と記す。）
に規定する。例えば、回転速度Ｎ１に相当するパルスレ
ートが１５０乃至２００ＰＰＳ（Ｐｕｌｓｅ Ｐｅｒ
Ｓｅｃｏｎｄ）程度である場合に、リバウンドの最大値
が仮に１０ステップ数分の距離であるとすると、この１
０ステップに数ステップを加えてステッピングモータ１
４ａの最小駆動ステップ数の整数倍となるようにＴＳの
値を規定する。When the actuator 14c reaches the limit of its movable range, rebound occurs.
Then, the stepping motor 14a is rotated at a rotation speed N2 set to a low value so as not to cause rebound (the pulse rate is set to a low frequency), and
The number of rotation steps is a predetermined value (this is referred to as “TS”).
Defined in For example, if the pulse rate corresponding to the rotation speed N1 is 150 to 200 PPS (Pulse Per
If the maximum value of the rebound is supposed to be a distance corresponding to 10 steps in the case of about (Second), this 1
Stepping motor 1 by adding several steps to 0 steps
The value of TS is defined so as to be an integral multiple of the minimum drive step number of 4a.

【００３１】Ｓ４では、ステップ数ＴＳの駆動が終了し
たか否かを判断し、終了時には次のＳ５に進むが、終了
前であればＳ３に戻る。In S4, it is determined whether or not the driving of the number of steps TS has been completed. At the end, the process proceeds to the next S5, but if not completed, the process returns to S3.

【００３２】Ｓ５ではオートレベリングの基準位置（つ
まり、灯具の照射方向制御の基準位置）を設定するため
に、ステッピングモータ１４ａを回転速度Ｎ１でもって
それまでとは反対向きに回転させ、アクチュエータ１４
ｃを駆動させる。そして、次のＳ６でアクチュエータ１
４ｃを駆動が終了したか否かを判断し、終了時には初期
動作を完了し、終了前である場合にはＳ５に戻る。In step S5, in order to set a reference position for auto-leveling (that is, a reference position for controlling the irradiation direction of the lamp), the stepping motor 14a is rotated at a rotation speed N1 in the opposite direction to that before, and the actuator 14 is rotated.
Drive c. Then, in the next S6, the actuator 1
It is determined whether or not the driving of 4c has been completed. When the driving has been completed, the initial operation is completed. When the driving has not been completed, the process returns to S5.

【００３３】図７乃至図１０はアクチュエータ１４ｃの
移動軸の速度（これを「Ｖ」と記す。）や位置（これを
「ｘ」と記す。）についての時間的変化（時間軸を
「ｔ」とする。）を簡略的に示したものであり、図７及
び図８はアクチュエータ１４ｃの移動軸がその上限位置
の近くにある状況で上記初期動作を行った場合を示して
おり、また、図９及び図１０はアクチュエータ１４ｃの
移動軸がその可動範囲の中程にある状況で上記初期動作
を行った場合を示している。尚、図中の「ｘｎ」はオー
トレベリングの基準位置に対応するｘ値を示している。FIGS. 7 to 10 show the temporal change (the time axis is represented by "t") of the velocity (this is represented by "V") and the position (this is represented by "x") of the moving axis of the actuator 14c. 7 and 8 show the case where the initial operation is performed in a situation where the movement axis of the actuator 14c is near its upper limit position. FIGS. 9 and 10 show the case where the above-described initial operation is performed in a situation where the movement axis of the actuator 14c is in the middle of its movable range. Note that “xn” in the drawing indicates an x value corresponding to the reference position of the auto-leveling.

【００３４】速度Ｖは、図７に示すように、期間０≦ｔ
≦ｔａにおいて「Ｖ１」、期間ｔａ＜ｔ≦ｔｂにおいて
「Ｖ２」、期間ｔｂ＜ｔ≦ｔｎにおいて「−Ｖ１」とさ
れ、期間ｔｂ＜ｔ≦ｔｎはオートレベリングの基準位置
への移行期間を示している。The speed V is, as shown in FIG.
“V1” for ≦ ta, “V2” for period ta <t ≦ tb, “−V1” for period tb <t ≦ tn, and period tb <t ≦ tn indicates a period of transition to the reference position of auto-leveling. ing.

【００３５】図８に示すように、ｔ＝ｔａの時点におい
てアクチュエータ１４ｃの移動軸が下限位置に突き当た
って跳ね返ったときに偏差ｈ（下限位置からの距離）が
生じるが、その後が偏差ｈが徐々に小さくなっていき、
ｔ＝ｔｂの時点ではほぼゼロとなる。As shown in FIG. 8, a deviation h (distance from the lower limit position) occurs when the moving axis of the actuator 14c strikes the lower limit position and rebounds at t = ta, and thereafter the deviation h gradually increases. And become smaller,
At the time of t = tb, it becomes almost zero.

【００３６】また、図９では、ｔ＝ｔａに達する前にア
クチュエータ１４ｃの移動軸がその下限位置に到達する
ため、期間Ｔｒ中に移動軸のリバウンドが発生する。In FIG. 9, since the moving axis of the actuator 14c reaches its lower limit position before reaching t = ta, the moving axis rebounds during the period Tr.

【００３７】よって、図１０に示すように、ｔ＝ｔａ′
（＜ｔａ）の時点においてアクチュエータ１４ｃの移動
軸が下限位置に突き当たってリバウンドが繰り返えされ
て、その間、同図の大円内に拡大して示すように、偏差
ｈ（最大１０ステップ程度）がほぼ周期的に生じるが、
ｔ＝ｔｂの時点に近づく頃には偏差ｈが数ステップ内に
収まっているので、位置出しの誤差が低減される。Therefore, as shown in FIG. 10, t = ta '.
At the time point (<ta), the movement axis of the actuator 14c hits the lower limit position, and rebound is repeated. During that time, as shown in the enlarged circle in FIG. Occurs almost periodically,
Since the deviation h is within several steps when approaching the time point of t = tb, the positioning error is reduced.

【００３８】尚、ｘ＝ｘｎに達するのに要する時間ｔｎ
が、上記Ｉｇ信号をＨ信号として直ちにＳＷ信号をＨ信
号とした時点から灯具が点灯するのに要する時間に比し
て短くなるように設定すると、初期動作を灯具の点灯前
に完了させることができる。つまり、初期動作が遅れる
と灯具の照射方向が変化するために、車輌の運転者に不
信感を抱かせる原因となる虞がある。The time tn required to reach x = xn
However, if the Ig signal is set to the H signal and the SW signal is immediately set to the H signal and set so as to be shorter than the time required for the lamp to light, the initial operation can be completed before the lamp is turned on. it can. In other words, if the initial operation is delayed, the irradiation direction of the lamp changes, which may cause a driver of the vehicle to feel distrust.

【００３９】[0039]

【発明の効果】以上に記載したところから明らかなよう
に、請求項１に係る発明によれば、駆動手段の初期位置
の決定にあたって、先ず、ステッピングモータを第１の
回転速度でもって回転させて、該ステッピングモータが
それ以上の角度をもって回転しなくなってから、より低
速の第２の回転速度でもってモータを回転させているの
で、振動によるリバウンドの幅が小さくなり、よって、
原点の位置出しの精度が高くなり、また、そのために長
い時間を費やすことがない。As is apparent from the above description, according to the first aspect of the present invention, when determining the initial position of the driving means, first, the stepping motor is rotated at the first rotation speed. Since the stepping motor stops rotating at an angle larger than that, and then rotates the motor at the lower second rotation speed, the width of the rebound due to the vibration is reduced.
The accuracy of positioning the origin is increased, and a long time is not spent for that.

【００４０】請求項２に係る発明によれば、第１の回転
速度又は第２の回転速度を一定値とすることによって制
御や装置構成の簡単化及び初期動作の迅速化を図ること
ができる。According to the second aspect of the present invention, by setting the first rotation speed or the second rotation speed to a constant value, it is possible to simplify the control and the device configuration and to speed up the initial operation.

【００４１】請求項３に係る発明によれば、第１の回転
速度又は第２の回転速度を、時間経過につれて段階的若
しくは連続的に減速することによって、駆動機構がその
可動範囲の限界位置に達した時点以後に生じる振動の幅
を低減することができる。According to the third aspect of the present invention, the first rotation speed or the second rotation speed is reduced stepwise or continuously over time, so that the drive mechanism moves to the limit position of the movable range. It is possible to reduce the width of the vibration that occurs after the time when the vibration has been reached.

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

【図１】本発明に係る装置の基本構成を示すブロック図
である。FIG. 1 is a block diagram showing a basic configuration of an apparatus according to the present invention.

【図２】初期動作制御の一例を示すグラフ図である。FIG. 2 is a graph showing an example of initial operation control.

【図３】図２とは異なる初期動作制御例を示すグラフ図
である。FIG. 3 is a graph showing an example of an initial operation control different from that of FIG. 2;

【図４】図５乃至図１０とともに本発明の実施例を示す
ものであり、本図は装置の構成を示すブロック図であ
る。FIG. 4 shows an embodiment of the present invention together with FIG. 5 to FIG. 10, and FIG. 4 is a block diagram showing a configuration of the apparatus.

【図５】装置の要部の構成を示すブロック図である。FIG. 5 is a block diagram showing a configuration of a main part of the device.

【図６】初期動作の流れを示すフローチャート図であ
る。FIG. 6 is a flowchart illustrating a flow of an initial operation.

【図７】図８とともにアクチュエータの移動軸がその上
限位置の近くにある状況で初期動作を行った場合を示し
ており、本図は移動軸の速度の時間的変化を示す説明図
である。FIG. 7 shows a case where an initial operation is performed in a state where the moving axis of the actuator is near its upper limit position together with FIG. 8, and FIG. 7 is an explanatory diagram showing a temporal change in the speed of the moving axis.

【図８】移動軸の位置の時間的変化を示す説明図であ
る。FIG. 8 is an explanatory diagram showing a temporal change in the position of a moving axis.

【図９】図１０とともにアクチュエータの移動軸がその
可動範囲の中程にある状況で初期動作を行った場合を示
しており、本図は移動軸の速度の時間的変化を示す説明
図である。9 shows a case where the initial operation is performed in a state where the moving axis of the actuator is in the middle of the movable range together with FIG. 10, and FIG. 9 is an explanatory diagram showing a temporal change in the speed of the moving axis. .

【図１０】移動軸の位置の時間的変化を示す説明図であ
る。FIG. 10 is an explanatory diagram showing a temporal change in the position of a moving axis.

【図１１】従来の問題点についての説明図である。FIG. 11 is an explanatory diagram of a conventional problem.

【符号の説明】[Explanation of symbols]

１…灯具の照射方向制御装置、２…指令手段、３…制御
手段、４…駆動手段、５…灯具、６…ステッピングモー
タ、７…駆動機構REFERENCE SIGNS LIST 1 irradiation direction control device for lamp 2 commanding device 3 control device 4 driving device 5 lamp device 6 stepping motor 7 driving mechanism

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 灯具の照射方向を所望の方向に向けるた
めの駆動手段が、ステッピングモータと該ステッピング
モータによって駆動される駆動機構とを備えており、駆
動機構の可動範囲によってステッピングモータの回転角
範囲が制限されるように構成された灯具の照射方向制御
装置において、 （イ）装置の作動後に駆動手段の初期位置を決定するた
めの指令信号を指令手段が制御手段に対して送出するこ
と、 （ロ）指令手段からの指令信号を制御手段が受けた場合
に、駆動機構の可動範囲に相当する回転角範囲を越える
角度指令及びその際にステッピングモータを第１の回転
速度でもって回転させるための速度指令を含む制御信号
を、制御手段がステッピングモータに送出すること、 （ハ）（ロ）の角度指令の後、上記第１の回転速度より
低速とされる第２の回転速度をもって所定のステップ数
だけステッピングモータを回転させるための制御信号を
制御手段がステッピングモータに送出することを特徴と
する灯具の照射方向制御装置。1. A driving means for directing an irradiation direction of a lamp in a desired direction includes a stepping motor and a driving mechanism driven by the stepping motor, and a rotation angle of the stepping motor depends on a movable range of the driving mechanism. In the illumination direction control device for a lamp configured to have a limited range, (a) the command device sends a command signal for determining an initial position of the driving device to the control device after the device is operated; (B) When the control means receives a command signal from the command means, an angle command exceeding the rotation angle range corresponding to the movable range of the drive mechanism and, at that time, rotating the stepping motor at the first rotation speed. The control means sends a control signal including the speed command to the stepping motor; (c) after the angle command in (b), the control signal is output from the first rotation speed. An illumination direction control device for a lamp, wherein the control means sends a control signal to the stepping motor to rotate the stepping motor by a predetermined number of steps at a low second rotation speed. 【請求項２】 請求項１に記載した灯具の照射方向制御
装置において、 第１の回転速度又は第２の回転速度が一定値であること
を特徴とする灯具の照射方向制御装置。2. The illumination direction control device for a lamp according to claim 1, wherein the first rotation speed or the second rotation speed is a constant value. 【請求項３】 請求項１に記載した灯具の照射方向制御
装置において、 第１の回転速度又は第２の回転速度が、時間経過につれ
て段階的若しくは連続的に減速されることを特徴とする
灯具の照射方向制御装置。3. The lighting direction control device for a lamp according to claim 1, wherein the first rotation speed or the second rotation speed is reduced stepwise or continuously over time. Irradiation direction control device.
JP09135124A 1997-05-26 1997-05-26 Illumination direction control device for vehicle lighting Expired - Fee Related JP3128618B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP09135124A JP3128618B2 (en) 1997-05-26 1997-05-26 Illumination direction control device for vehicle lighting
GB9810896A GB2325757B (en) 1997-05-26 1998-05-20 Irradiation direction control apparatus for lamp
DE1998123487 DE19823487C2 (en) 1997-05-26 1998-05-26 Control apparatus for the direction of radiation from a lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP09135124A JP3128618B2 (en) 1997-05-26 1997-05-26 Illumination direction control device for vehicle lighting

Publications (2)

Publication Number Publication Date
JPH10326505A true JPH10326505A (en) 1998-12-08
JP3128618B2 JP3128618B2 (en) 2001-01-29

Family

ID=15144390

Family Applications (1)

Application Number Title Priority Date Filing Date
JP09135124A Expired - Fee Related JP3128618B2 (en) 1997-05-26 1997-05-26 Illumination direction control device for vehicle lighting

Country Status (3)

Country Link
JP (1) JP3128618B2 (en)
DE (1) DE19823487C2 (en)
GB (1) GB2325757B (en)

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US7511440B2 (en) 2005-07-29 2009-03-31 Koito Manufacturing Co., Ltd. Emitting direction control apparatus for lamp
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Also Published As

Publication number Publication date
DE19823487A1 (en) 1998-12-03
GB9810896D0 (en) 1998-07-22
GB2325757A (en) 1998-12-02
GB2325757B (en) 1999-07-07
DE19823487C2 (en) 2002-09-19
JP3128618B2 (en) 2001-01-29

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