JPH06138358A - Method and device for controlling motor of optical apparatus - Google Patents
Method and device for controlling motor of optical apparatusInfo
- Publication number
- JPH06138358A JPH06138358A JP4290398A JP29039892A JPH06138358A JP H06138358 A JPH06138358 A JP H06138358A JP 4290398 A JP4290398 A JP 4290398A JP 29039892 A JP29039892 A JP 29039892A JP H06138358 A JPH06138358 A JP H06138358A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- lens
- motors
- driving
- drive
- 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
Links
Landscapes
- Lens Barrels (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はカメラ等の光学機器にお
けるモータ制御方法及び装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor control method and apparatus for optical equipment such as a camera.
【０００２】[0002]
【従来の技術】最近のカメラ等の精密機器においては少
なくとも２台以上のモータが搭載されているものが多
い。従って、該機器全体で消費される電力量も無視でき
ぬ量になっており、カメラ等の小型携帯機器の場合には
搭載する電池の容量を小さくするために、各モータの電
力消費量ができるだけ小さいことが望ましい。2. Description of the Related Art In recent years, many precision instruments such as cameras are equipped with at least two motors. Therefore, the amount of power consumed by the device as a whole cannot be ignored, and in the case of a small portable device such as a camera, the power consumption of each motor should be reduced as much as possible in order to reduce the capacity of the battery to be installed. Smaller is desirable.
【０００３】従来、一眼レフカメラ用交換レンズの中に
はレンズ駆動用モータ等を内蔵したものがあり、この公
知のモータ内蔵型交換レンズでは、変倍レンズ駆動用モ
ータ及び合焦レンズ駆動用モータとして２台の直流モー
タもしくはステッピングモータが搭載され、該両モータ
は、たとえばＰＷＭ（パルス幅変調）方式によるパルス
信号によりチョツパー駆動（デューティ駆動）されるよ
うになっていた。Conventionally, some interchangeable lenses for single-lens reflex cameras have a lens driving motor or the like built therein. In this known interchangeable lens with a built-in motor, a zoom lens driving motor and a focusing lens driving motor are known. As an example, two DC motors or stepping motors are mounted, and both the motors are designed to be chopper-driven (duty-driven) by a pulse signal based on, for example, a PWM (pulse width modulation) method.
【０００４】図７において、１はＣＰＵ、１５は変倍レ
ンズ、１６は合焦レンズ、１３は変倍レンズ駆動用のモ
ータ、１４は合焦レンズ駆動用のモータ、１１及び１２
は該モータ１３及び１４に通電を制御する駆動回路、９
及び１０は該駆動回路１１及び１２にパルス信号を印加
するためのコンパレータ、６は該コンパレータ９及び１
０にのこぎり波或いは三角波を入力するのこぎり波パル
スもしくは三角波パルス発生回路、４ａ及び４ｂはＣＰ
Ｕ１からコンパレータ９及び１０に入力される所定のリ
ニア駆動信号、である。In FIG. 7, 1 is a CPU, 15 is a variable power lens, 16 is a focusing lens, 13 is a motor for driving a variable power lens, 14 is a motor for driving a focusing lens, and 11 and 12
Is a drive circuit for controlling energization of the motors 13 and 14, and 9
And 10 are comparators for applying pulse signals to the drive circuits 11 and 12, and 6 is the comparators 9 and 1.
Sawtooth pulse or triangle wave pulse generation circuit for inputting sawtooth wave or triangle wave to 0, 4a and 4b are CP
A predetermined linear drive signal input from U1 to the comparators 9 and 10.
【０００５】[0005]
【発明が解決しようとする課題】前述した公知のカメラ
用交換レンズでは、各モータがパルス信号によりチョツ
パー駆動されるので非パルス駆動にくらべれば電力消費
は少ないが、図６のように２台のモータが同時に駆動さ
れる時に各モータへの駆動パルス信号の位相が重なると
両モータへの通電時間が重なるため、電池は２台のモー
タに同時に通電することになり、従って大きな電池容量
が必要であった。また、両モータへの通電時間が重なる
ため、両モータが各駆動パルス毎に同時に起動されるの
でモータから生じる騒音や振動もかなり大きなものとな
っていた。In the above-mentioned known interchangeable lens for a camera, each motor is chopper-driven by a pulse signal, so that power consumption is smaller than non-pulse driving, but as shown in FIG. If the phases of the drive pulse signals to the motors overlap when the motors are driven simultaneously, the energization times to both motors will overlap, so the batteries will be energized to the two motors at the same time, and therefore a large battery capacity is required. there were. Further, since the energization time to both motors overlaps, both motors are simultaneously started for each drive pulse, so that noise and vibration generated from the motors are considerably large.
【０００６】すなわち、前記従来の交換レンズでは、比
較的大きな電池を必要とするため重量が大きいこと、変
倍レンズと合焦レンズとが同時に駆動される時には発生
騒音や振動が大きいこと、等の問題があった。That is, the conventional interchangeable lens requires a relatively large battery and therefore is heavy, and when the variable power lens and the focusing lens are simultaneously driven, noise and vibration are large. There was a problem.
【０００７】本発明の目的は、前記問題を解決し、従来
の光学機器よりも軽量であり、且つ騒音や振動の少な
い、改良された光学機器を実現できる、光学機器のモー
タ制御方法及び装置を提供することである。An object of the present invention is to provide a motor control method and apparatus for an optical device which solves the above-mentioned problems and which can realize an improved optical device that is lighter in weight than conventional optical devices and has less noise and vibration. Is to provide.
【０００８】[0008]
【課題を解決するための手段】本発明の制御方法は、パ
ルス信号により駆動される少なくとも２台のモータを有
する光学機器において、該両モータが同時に駆動される
時には該両モータを時分割制御することを特徴とする。According to a control method of the present invention, in an optical device having at least two motors driven by pulse signals, both motors are time-divisionally controlled when both motors are simultaneously driven. It is characterized by
【０００９】また、本発明によるモータ制御装置では、
該両モータが同時に駆動される時には、該両モータの駆
動回路に印加されるパルス信号の位相を互いに重ならぬ
ようにするためのパルス位相制御手段が設けられている
ことを特徴とする。Further, in the motor control device according to the present invention,
When both the motors are driven simultaneously, pulse phase control means is provided for preventing the phases of the pulse signals applied to the drive circuits of the both motors from overlapping each other.
【００１０】[0010]
【作用】本発明の方法及び装置によれば、２台のモータ
が同時に駆動される場合であっても、瞬時的には両モー
タへの通電時間は互いに重ならないので、電池は１台分
のモータの電流を流せるだけの容量ですみ、また、各瞬
時のモータ発生騒音及び発生振動はモータ１台分だけと
なるため、該機器全体の発生騒音及び振動が従来の光学
機器のそれよりも小さくなり、その結果、本発明によれ
ば、従来の光学機器よりも軽量且つ小型で、しかも、消
費電力も小さく、振動及び騒音の小さい、改良された光
学機器を実現できる。According to the method and apparatus of the present invention, even when two motors are driven at the same time, the energizing times to both motors do not momentarily overlap each other, so that the battery for one motor is used. The capacity to pass the current of the motor is sufficient, and the noise and vibration generated by the motor at each moment is only one motor, so the noise and vibration of the entire device is smaller than that of conventional optical devices. As a result, according to the present invention, it is possible to realize an improved optical device which is lighter and smaller than the conventional optical device, and which consumes less power and has less vibration and noise.
【００１１】[0011]
【実施例】以下に図を参照して本発明の実施例を説明す
る。 ＜実施例１＞図１において、１はモータを制御するＣＰ
Ｕ、２はタイマ、３は変倍レンズモータ駆動用時間と合
焦レンズモータ駆動用時間を分割する時分割制御信号、
４は該信号３によって決められたモータの駆動出力信
号、５は時分割回路、６はＰＷＭ用基準のこぎり波形発
生回路、７は変倍レンズ駆動信号、８は合焦レンズ駆動
信号、９及び１０はコンパレータ、１１及び１２はＰＷ
Ｍ駆動回路、１３は変倍レンズ駆動用ステッピングモー
タ、１４は合焦レンズ駆動用ステッピングモータ、であ
る。Embodiments of the present invention will be described below with reference to the drawings. <Embodiment 1> In FIG. 1, reference numeral 1 is a CP for controlling a motor.
U, 2 are timers, 3 is a time-division control signal for dividing the time for driving the zoom lens motor and the time for driving the focusing lens motor,
Reference numeral 4 is a motor drive output signal determined by the signal 3. Reference numeral 5 is a time division circuit. Reference numeral 6 is a PWM reference sawtooth waveform generation circuit. Reference numeral 7 is a variable lens drive signal. Reference numeral 8 is a focusing lens drive signal. Is a comparator, 11 and 12 are PW
Reference numeral 13 is an M drive circuit, 13 is a stepping motor for driving a variable magnification lens, and 14 is a stepping motor for driving a focusing lens.
【００１２】上記構成において、ＣＰＵは３の時分割制
御信号を変倍レンズ側にセットする。次に変倍レンズ駆
動信号を４に出力し、５の時分割回路で７の変倍レンズ
駆動信号となり、以下ＰＷＭで変倍レンズを駆動する。In the above arrangement, the CPU sets the time-division control signal of 3 on the variable power lens side. Next, the variable-magnification lens drive signal is output to 4, and the time-division circuit of 5 becomes the variable-magnification lens drive signal of 7. Then, the variable-magnification lens is driven by PWM.
【００１３】図２（ｄ）のように、時間ｔ1 で合焦レン
ズ側にセットして、こんどは合焦レンズを前記変倍レン
ズと同様の方法で駆動する。時間ｔ2 で再び変倍レンズ
側、時間ｔ3 で合焦レンズ側となるように交互に駆動し
ていく。変倍レンズ、合焦レンズに流れる電流はそれぞ
れ図２（ａ），（ｂ）のようになる。したがって、この
２個の駆動モータに流れるトータルの電流は図２（ｃ）
のようになり、モータ１個を駆動する電流でモータ２個
を駆動することができる。また、モータを１個ずつ駆動
しているので、振動もモータ１個から発生するのみとな
り、低減できる。As shown in FIG. 2D, the focusing lens is set at the time t 1 , and the focusing lens is driven in the same manner as the variable power lens. At time t 2 , the zoom lens is driven again, and at time t 3 , the lens is moved to the focusing lens side alternately. The currents flowing through the variable power lens and the focusing lens are as shown in FIGS. 2 (a) and 2 (b), respectively. Therefore, the total current flowing through these two drive motors is shown in FIG.
Thus, the two motors can be driven by the current that drives one motor. Further, since the motors are driven one by one, vibrations are generated only from one motor, which can be reduced.
【００１４】また、上記タイマ２と時分割回路５は、Ｃ
ＰＵ１内でソフトウェアで作成することもできる。Further, the timer 2 and the time division circuit 5 are C
It can also be created by software in PU1.
【００１５】＜実施例２＞図３は図１の回路を使用し
て、変倍レンズの敏感度に対応して合焦レンズを駆動す
る場合を示したフローである。図３を用いて説明する。<Embodiment 2> FIG. 3 is a flow chart showing a case where the focusing lens is driven according to the sensitivity of the variable power lens by using the circuit of FIG. This will be described with reference to FIG.
【００１６】図４で示されるうちの１つの変倍レンズ速
度が図１のＣＰＵ１により設定され、変倍レンズはその
速度で駆動される。One of the zoom lens speeds shown in FIG. 4 is set by the CPU 1 in FIG. 1, and the zoom lens is driven at that speed.
【００１７】（ステップ１）変倍レンズモータを駆動し
て変倍レンズを移動させる。(Step 1) The variable power lens motor is driven to move the variable power lens.
【００１８】（ステップ２）変倍レンズ駆動時間が終了
かどうかを、図１タイマ２からのクロックをＣＰＵ１が
カウントしていき、例えば図４の変倍レンズ速度１の場
合１０カウントしたかどうかにより判定する。終了であ
れば変倍レンズの駆動を停止してステップ３へ進み、終
了でなければステップ１へ進む。(Step 2) The CPU 1 counts the clock from the timer 2 in FIG. 1 to determine whether or not the variable-magnification lens drive time has ended. For example, in the case of the variable-magnification lens speed 1 in FIG. judge. If it is ended, the driving of the variable power lens is stopped and the process proceeds to step 3, and if it is not ended, the process proceeds to step 1.
【００１９】（ステップ３）変倍レンズの停止位置を読
む。(Step 3) Read the stop position of the variable power lens.
【００２０】（ステップ４）ステップ３で読んだ変倍レ
ンズの位置から合焦レンズの移動量を算出し、その移動
量と合焦レンズを駆動する所定の移動速度から、合焦レ
ンズ駆動時間を算出し、変倍レンズと同様図５のような
テーブルからタイマカウント数を決定する。(Step 4) The moving amount of the focusing lens is calculated from the position of the variable power lens read in step 3, and the focusing lens driving time is calculated from the moving amount and a predetermined moving speed for driving the focusing lens. It is calculated, and the timer count number is determined from the table as shown in FIG.
【００２１】（ステップ５）合焦レンズを所定の移動速
度で駆動して移動させる。(Step 5) The focusing lens is driven and moved at a predetermined moving speed.
【００２２】（ステップ６）合焦レンズ駆動時間が終了
かどうかを判定し、終了であれば合焦レンズの駆動を停
止してプログラムを終了する。終了でなければ、ステッ
プ５に進む。合焦レンズ駆動時間の終了は、ステップ４
で算出した合焦レンズ駆動時間・タイマカウント数によ
り判定する。(Step 6) It is judged whether or not the focusing lens drive time is over, and if it is over, the focusing lens drive is stopped and the program ends. If not completed, the process proceeds to step 5. Step 4 is the end of the focusing lens drive time.
The determination is made based on the focusing lens drive time and the timer count calculated in step.
【００２３】[0023]
【発明の効果】以上説明したように、本発明の方法及び
装置によれば、モータ２個を駆動する場合、駆動電流を
時分割で流すように制御することにより、また、変倍レ
ンズの敏感度により合焦レンズの駆動時間を可変するこ
とによりモータ駆動用トータル電流はモータ１個分の最
大電流容量で可能となり、モータ２個同時駆動時に２個
のモータから発生していた振動も１つのモータからの発
生のみになる。As described above, according to the method and apparatus of the present invention, when two motors are driven, the driving current is controlled to flow in a time-division manner, and the sensitivity of the variable power lens is increased. By changing the drive time of the focusing lens depending on the degree, the total current for motor drive can be made the maximum current capacity of one motor, and the vibration generated from two motors when two motors are driven simultaneously is also one. Only generated from the motor.
【図１】本発明の方法によるモータ制御装置を適用した
レンズ駆動装置の構成を示した図。FIG. 1 is a diagram showing a configuration of a lens driving device to which a motor control device according to the method of the present invention is applied.
【図２】本発明の方法及び装置を適用して構成されたレ
ンズ駆動装置におけるモータ駆動信号及びモータ通電時
間を示す図。FIG. 2 is a diagram showing a motor drive signal and a motor energization time in a lens drive device configured by applying the method and device of the present invention.
【図３】本発明の第２実施例の制御フローチャート。FIG. 3 is a control flowchart of a second embodiment of the present invention.
【図４】本発明の第２実施例の変倍レンズ駆動時間変換
タイムテーブル。FIG. 4 is a time table for converting a variable-magnification lens drive time according to a second embodiment of the present invention.
【図５】本発明の第２実施例の合焦レンズ駆動時間変換
タイムテーブル。FIG. 5 is a focusing lens drive time conversion time table according to the second embodiment of the present invention.
【図６】従来の光学機器における変倍レンズ駆動用モー
タと合焦レンズ駆動モータにおける駆動電流を示した
図。FIG. 6 is a diagram showing drive currents in a variable power lens drive motor and a focusing lens drive motor in a conventional optical device.
【図７】従来の光学機器におけるレンズ駆動装置の構成
を示した図。FIG. 7 is a diagram showing a configuration of a lens driving device in a conventional optical device.
１…駆動を制御するＣＰＵ ２…時分割制御用
タイマ ３…時分割制御信号 ４…駆動信号 ５…時分割回路 ６…ＰＷＭ用のこ
ぎり波発生回路 ９，１０…コンパレータ １１，１２…駆動
回路 １３…変倍レンズ駆動用ステッピングモータ １４…合焦レンズ駆動用ステッピングモータ １５…変倍レンズ １６…合焦レンズDESCRIPTION OF SYMBOLS 1 ... CPU which controls drive 2 ... Time division control timer 3 ... Time division control signal 4 ... Drive signal 5 ... Time division circuit 6 ... PWM sawtooth wave generation circuit 9, 10 ... Comparator 11, 12 ... Drive circuit 13 ... Magnification lens driving stepping motor 14 ... Focusing lens driving stepping motor 15 ... Magnification lens 16 ... Focusing lens
Claims (4)
信号により駆動される第一及び第二のモータを有してい
る光学機器のモータ制御方法にして、該第一及び第二の
モータが同時に駆動される時には該一及び第二のモータ
に対する通電位相が互いに重ならぬように該両モータを
時分割駆動することを特徴とする、光学機器のモータ制
御方法。1. A motor control method for an optical apparatus having first and second motors which are fed from the same power source and driven by pulse signals, wherein the first and second motors are simultaneously driven. A method of controlling a motor of an optical device, characterized in that both motors are time-divisionally driven so that energization phases of the first and second motors do not overlap each other.
信号により駆動される第一及び第二のモータと、該第一
のモータに対する通電を制御する第一の駆動回路と、該
第二のモータに対する通電を制御する第二の駆動回路
と、該第一の駆動回路にパルス信号を印加する第一のパ
ルス信号発生手段と、該第二の駆動回路にパルス信号を
印加する第二のパルス発生手段と、を有する光学機器の
モータ制御装置において、 該第一のモータと該第二のモータが同時に駆動される期
間においては該第一及び第二のパルス信号発生手段の出
力パルスを交互に発生させるスイッチ手段が該第一及び
第二のパルス信号発生手段の入力端に接続されているこ
とを特徴とする、光学機器のモータ制御装置。2. A first and a second motor which are supplied with power from the same power source and driven by a pulse signal, a first drive circuit which controls energization of the first motor, and a second motor. A second drive circuit for controlling energization, a first pulse signal generation means for applying a pulse signal to the first drive circuit, and a second pulse generation means for applying a pulse signal to the second drive circuit And a motor control device for an optical device, wherein output pulses of the first and second pulse signal generating means are alternately generated in a period in which the first motor and the second motor are simultaneously driven. A motor control device for optical equipment, wherein a switch means is connected to the input ends of the first and second pulse signal generating means.
ズを駆動するための変倍レンズ駆動モータであり、該第
二のモータが該光学機器の合焦用レンズを駆動する合焦
レンズ駆動モータであり、該レンズの敏感度に応じて該
第一のモータの駆動時間により該第二のモータの駆動時
間を変化させることを特徴とする請求項１の光学機器の
モータ制御方法。3. The focusing motor driving the zoom lens of the optical device, wherein the first motor is a zoom lens driving motor for driving the zoom lens of the optical device, and the focusing motor driving the focusing lens of the optical device. 2. The motor control method for an optical device according to claim 1, wherein the motor is a lens drive motor, and the drive time of the second motor is changed according to the sensitivity of the lens according to the drive time of the first motor.
ズを駆動する変倍レンズ駆動モータであり、該第二のモ
ータが該光学機器の合焦用レンズを駆動する合焦レンズ
駆動モータであり、該レンズの敏感度に応じて該第一の
モータの駆動時間により該第二のモータの駆動時間を変
化させる制御手段が設けられていることを特徴とする請
求項２の光学機器のモータ制御装置。4. The first lens is a variable power lens drive motor for driving a variable power lens of the optical device, and the second motor is a focusing lens drive for driving a focusing lens of the optical device. 3. The optical device according to claim 2, further comprising a control unit that is a motor and that changes the drive time of the second motor in accordance with the drive time of the first motor according to the sensitivity of the lens. Motor controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4290398A JPH06138358A (en) | 1992-10-28 | 1992-10-28 | Method and device for controlling motor of optical apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4290398A JPH06138358A (en) | 1992-10-28 | 1992-10-28 | Method and device for controlling motor of optical apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06138358A true JPH06138358A (en) | 1994-05-20 |
Family
ID=17755498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4290398A Pending JPH06138358A (en) | 1992-10-28 | 1992-10-28 | Method and device for controlling motor of optical apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06138358A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006184580A (en) * | 2004-12-27 | 2006-07-13 | Casio Comput Co Ltd | Camera device and lens driving method |
| JP2007148075A (en) * | 2005-11-29 | 2007-06-14 | Sharp Corp | Lens driving device and lens driving method |
| JP2007316505A (en) * | 2006-05-29 | 2007-12-06 | Sharp Corp | Lens drive control method and camera module for executing the method |
| JP2008070721A (en) * | 2006-09-15 | 2008-03-27 | Casio Comput Co Ltd | Imaging apparatus and program thereof |
| JP2011133908A (en) * | 2011-03-25 | 2011-07-07 | Casio Computer Co Ltd | Imaging apparatus and program thereof |
| JP2012128315A (en) * | 2010-12-17 | 2012-07-05 | Canon Inc | Lens system |
| JP2012255910A (en) * | 2011-06-09 | 2012-12-27 | Nikon Corp | Imaging apparatus |
| JP2015011112A (en) * | 2013-06-27 | 2015-01-19 | キヤノン株式会社 | Imaging device, method for controlling the same, and control program |
-
1992
- 1992-10-28 JP JP4290398A patent/JPH06138358A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006184580A (en) * | 2004-12-27 | 2006-07-13 | Casio Comput Co Ltd | Camera device and lens driving method |
| JP2007148075A (en) * | 2005-11-29 | 2007-06-14 | Sharp Corp | Lens driving device and lens driving method |
| JP2007316505A (en) * | 2006-05-29 | 2007-12-06 | Sharp Corp | Lens drive control method and camera module for executing the method |
| JP2008070721A (en) * | 2006-09-15 | 2008-03-27 | Casio Comput Co Ltd | Imaging apparatus and program thereof |
| JP2012128315A (en) * | 2010-12-17 | 2012-07-05 | Canon Inc | Lens system |
| JP2011133908A (en) * | 2011-03-25 | 2011-07-07 | Casio Computer Co Ltd | Imaging apparatus and program thereof |
| JP2012255910A (en) * | 2011-06-09 | 2012-12-27 | Nikon Corp | Imaging apparatus |
| JP2015011112A (en) * | 2013-06-27 | 2015-01-19 | キヤノン株式会社 | Imaging device, method for controlling the same, and control program |
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