Title:
車両用指示計器の初期設定方法
Document Type and Number:
Japanese Patent JP4888506
Kind Code:
B2
Abstract:
According to a method for initializing an indicating instrument for a vehicle, zero-reset processing is performed. In the zero-reset processing, a control device is made to control a drive signal to rotate a pointer in a zero-reset direction in order to force a step motor to lose synchronization. Furthermore, synchronization loss detection processing is performed. In the detection processing, a physical phenomenon generated in a rotary drive system due to forcible synchronization loss of the motor during the zero-reset processing, is detected. Then, an electrical angle of the drive signal at a time of detection of the phenomenon is selected as a synchronization loss electrical angle. Finally, zero point setting processing is performed. In the setting processing, the electrical angle phase-shifted from the synchronization loss electrical angle in an indication value increasing direction by 180 degrees or less, is set as a zero point stored in the control device.
Inventors:
Hideyuki Nakane
Application Number:
JP2009075028A
Publication Date:
February 29, 2012
Filing Date:
March 25, 2009
Export Citation:
Assignee:
株式会社デンソー
International Classes:
G01D11/00; G01D11/16; G01D13/22; H02P8/00
Domestic Patent References:
| JP2002112589A | ||||
| JP3770095B2 | ||||
| JP2008005648A | ||||
| JP2007093524A | ||||
| JP2006352948A | ||||
| JP2006101655A | ||||
| JP2003125599A | ||||
| JP2000050695A | ||||
| JP2002272190A |
Attorney, Agent or Firm:
Kazuyuki Yahagi
Taihei Nonobe
Takanori Kubo
Taihei Nonobe
Takanori Kubo