JPH11110045A5 - - Google Patents
Info
- Publication number
- JPH11110045A5 JPH11110045A5 JP1997268458A JP26845897A JPH11110045A5 JP H11110045 A5 JPH11110045 A5 JP H11110045A5 JP 1997268458 A JP1997268458 A JP 1997268458A JP 26845897 A JP26845897 A JP 26845897A JP H11110045 A5 JPH11110045 A5 JP H11110045A5
- Authority
- JP
- Japan
- Prior art keywords
- controlled object
- stepping motor
- detects
- control unit
- mcu
- 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.)
- Abandoned
Links
Description
【００２０】
図１に図解したステッピングモータ制御装置においては、制御対象４の位置を検出する位置検出器６の信号を制御手段１にフィードバックして、制御対象４の実際の移動量を算出するクローズド・ループ構成でステッピングモータ３および制御対象４を制御するので、特に、制御対象４の実際の位置制御を行うので、正確な位置制御が可能になる。
特に、本発明のステッピングモータ制御装置においては、ステッピングモータ３には位置検出器６を装着または配設せず、制御対象４側に位置検出器６を配設して、直接、制御対象４の位置検出を検出する。それにより、制御対象４の正確な位置検出が可能になるとともに、ステッピングモータ３に位置検出器６を装着する困難さが回避できる。
さらに本発明によれば、制御手段１としてのＭＣＵにおいて、ステッピングモータドライバ２に与えた指令と、位置検出器６で検出した制御対象４の実際の位置とを比較して、ステッピングモータ３および制御対象４が正常に動作したか、脱調現象などの異常が発生したか否かを判断できる。[0020]
In the stepping motor control device illustrated in FIG. 1, the signal from the position detector 6, which detects the position of the controlled object 4, is fed back to the control means 1 to control the stepping motor 3 and the controlled object 4 in a closed-loop configuration in which the actual movement amount of the controlled object 4 is calculated. In particular, since the actual position of the controlled object 4 is controlled, accurate position control is possible.
In particular, in the stepping motor control device of the present invention, the position detector 6 is not attached or disposed on the stepping motor 3, but is disposed on the side of the controlled object 4, and directly detects the position of the controlled object 4. This makes it possible to accurately detect the position of the controlled object 4, and also avoids the difficulty of attaching the position detector 6 to the stepping motor 3.
Furthermore, according to the present invention, the MCU as the control means 1 can compare the command given to the stepping motor driver 2 with the actual position of the controlled object 4 detected by the position detector 6 to determine whether the stepping motor 3 and the controlled object 4 are operating normally or whether an abnormality such as a step-out phenomenon has occurred.
【００２８】
ＭＲセンサ９、１０はそれぞれ、３相のＭＲセンサを用いて、サブミクロンオーダの位置まで正確に検出可能なようにしている。
ズームレンズ７の位置を検出するＭＲセンサ９の出力信号は、検出回路１８に入力される。フォーカスレンズ８の位置を検出するＭＲセンサ１０の出力信号は検出回路１７に入力される。
検出回路１７、１８では、その出力信号をＭＣＵ１９のＡ／Ｄコンバーターのダイナミックレンジに合うように増幅し、増幅された信号がＭＣＵ１９内でＡ／Ｄ変換されてフォーカスコントロール部２０およびズームコントロール部２１に提供される。その提供された信号からフォーカスコントロール部２０およびズームコントロール部２１においてフォーカスレンズ８およびズームレンズ７の位置を算出する。[0028]
The MR sensors 9 and 10 each use a three-phase MR sensor, making it possible to accurately detect positions on the order of submicrons.
An output signal of the MR sensor 9 that detects the position of the zoom lens 7 is input to a detection circuit 18. An output signal of the MR sensor 10 that detects the position of the focus lens 8 is input to a detection circuit 17.
The detection circuits 17 and 18 amplify the output signals to match the dynamic range of the A/D converter of the MCU 19, and the amplified signals are A/D converted within the MCU 19 and provided to a focus control unit 20 and a zoom control unit 21. The focus control unit 20 and the zoom control unit 21 calculate the positions of the focus lens 8 and the zoom lens 7 from the provided signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9268458A JPH11110045A (en) | 1997-10-01 | 1997-10-01 | Stepping motor control device and control device for lens drive system of video camera using stepping motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9268458A JPH11110045A (en) | 1997-10-01 | 1997-10-01 | Stepping motor control device and control device for lens drive system of video camera using stepping motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11110045A JPH11110045A (en) | 1999-04-23 |
| JPH11110045A5 true JPH11110045A5 (en) | 2004-11-18 |
Family
ID=17458795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9268458A Abandoned JPH11110045A (en) | 1997-10-01 | 1997-10-01 | Stepping motor control device and control device for lens drive system of video camera using stepping motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11110045A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4747523B2 (en) | 2004-07-02 | 2011-08-17 | ソニー株式会社 | Imaging device and zoom lens control method for imaging device |
| JP2007093467A (en) * | 2005-09-29 | 2007-04-12 | Asahi Kasei Electronics Co Ltd | Hall element connection circuit, lens position detection device, image sensor position detection device, and image pickup device |
| JP5350029B2 (en) * | 2008-03-14 | 2013-11-27 | キヤノン株式会社 | Optical equipment |
| KR101342463B1 (en) * | 2008-09-29 | 2013-12-16 | 삼성테크윈 주식회사 | Apparatus and method for compensating breakaway of lens |
| JP5371417B2 (en) | 2008-12-26 | 2013-12-18 | キヤノン株式会社 | LENS DRIVE DEVICE, OPTICAL DEVICE, AND LENS DRIVE DEVICE CONTROL METHOD |
| US8150253B2 (en) | 2009-10-22 | 2012-04-03 | Panasonic Corporation | Imaging apparatus and interchangeable lens |
| JP5615017B2 (en) * | 2010-04-05 | 2014-10-29 | キヤノン株式会社 | Optical equipment |
| JP5839850B2 (en) | 2010-08-30 | 2016-01-06 | キヤノン株式会社 | Imaging apparatus and control method thereof |
| JP5539157B2 (en) * | 2010-11-01 | 2014-07-02 | キヤノン株式会社 | Imaging apparatus and control method thereof |
| JP5855387B2 (en) * | 2011-08-11 | 2016-02-09 | オリンパス株式会社 | interchangeable lens |
-
1997
- 1997-10-01 JP JP9268458A patent/JPH11110045A/en not_active Abandoned
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