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Patent Searching and Data


Title:
POSITION DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/078268
Kind Code:
A1
Abstract:
A position detection device (10) comprising: a magnetism generating part (11); a hall effect sensor (13) for outputting a signal corresponding to the position thereof relative to the magnetism generating part (11); a memory (15) for storing correction values and various values that are used during the calculation of the correction values; and a DSP (14) which calculates a correction value, corrects, by the correction value, an actual output value based on the output signal of the hall effect sensor (13), and calculates a relative rotational angle of the magnetism generating part (11) relative to the hall effect sensor (13) on the basis of the corrected value. The DSP (14) calculates a first difference which is the difference between the actual output value and an ideal output value, and sets the first difference at n number of correction points, which have been pre-set in a prescribed measurement range, as provisional correction values, and carries out an interpolation process. The DSP (14) also calculates a second difference which is the difference between the post-interpolation output value and the ideal output value, makes minute adjustments, on the basis of the second difference, to the provisional correction value corresponding to the n number of correction points, and sets same as the correction value.

Inventors:
KONO Naoaki (Showa-cho Kariya-cit, Aichi 61, 〒4488661, JP)
YAMANAKA Tetsuji (Showa-cho Kariya-cit, Aichi 61, 〒4488661, JP)
Application Number:
JP2018/038702
Publication Date:
April 25, 2019
Filing Date:
October 17, 2018
Export Citation:
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Assignee:
DENSO CORPORATION (1-1 Showa-cho, Kariya-city Aichi, 61, 〒4488661, JP)
International Classes:
G01D5/20; G01D5/12
Foreign References:
JP2013019829A2013-01-31
JPH03175319A1991-07-30
JP2000123503A2000-04-28
US20060290545A12006-12-28
Attorney, Agent or Firm:
HATTORI Masaki (HATTORI & ASSOCIATES, Eighth Floor Arex BLDG., 4-12, Marunouchi 1-chome, Naka-k, Nagoya-shi Aichi 02, 〒4600002, JP)
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