Title:
NEEDLE-POINTER-TYPE METER DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/037673
Kind Code:
A1
Abstract:
In the present invention, when the excitation of a stepper motor starts, a control unit first positions the phase of an excitation signal at a prescribed excitation start position, subsequently moves back the phase of the excitation signal by a prescribed reverse angle so that a needle rotates in a reverse direction, and thereby positions the needle at a stopper position. The control unit then moves the phase of the excitation signal forward by an origin restoration angle and thereby rotates the needle in a positive direction from the stopper position to an origin position removed by a prescribed angle from the stopper position and positions the needle at the origin position. Here, the origin restoration angle is an angle arrived at by summing a backlash angle, a prescribed positive pre-offset angle, and a positive drive error correction angle set on the basis of the drive error of the needle in relation to the stopper. As a result, a needle-pointer-type meter device is provided that is capable of enhancing the freedom of driving error correction.
Inventors:
YAMADA YOSHIHISA (JP)
Application Number:
PCT/JP2014/074115
Publication Date:
March 19, 2015
Filing Date:
September 11, 2014
Export Citation:
Assignee:
YAZAKI CORP (JP)
International Classes:
G01D11/00; G01D13/22; H02P8/00
Foreign References:
| JP2008008728A | 2008-01-17 | |||
| JP2006064437A | 2006-03-09 | |||
| JP2010181287A | 2010-08-19 | |||
| JP2003130694A | 2003-05-08 | |||
| JP2007232436A | 2007-09-13 |
Attorney, Agent or Firm:
TORANOMON-IP FIRM (JP)
Patent business corporation Toranomon intellectual property office (JP)
Patent business corporation Toranomon intellectual property office (JP)
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