Invention Grant
US08494796B2 Counting device, physical quantity sensor, counting method and physical quantity measuring method 有权
计数装置,物理量传感器,计数方法和物理量测量方法

  • Patent Title: Counting device, physical quantity sensor, counting method and physical quantity measuring method
  • Patent Title (中): 计数装置,物理量传感器,计数方法和物理量测量方法
  • Application No.: US12849330
    Application Date: 2010-08-03
  • Publication No.: US08494796B2
    Publication Date: 2013-07-23
  • Inventor: Tatsuya Ueno
  • Applicant: Tatsuya Ueno
  • Applicant Address: JP Tokyo
  • Assignee: Azbil Corporation
  • Current Assignee: Azbil Corporation
  • Current Assignee Address: JP Tokyo
  • Agency: Troutman Sanders LLP
  • Priority: JP2009-181442 20090804
  • Main IPC: G01R13/02
  • IPC: G01R13/02
Counting device, physical quantity sensor, counting method and physical quantity measuring method
Abstract:
The counting device includes: a signal counter that counts the number of half cycles of input signals during given counting periods; a signal half cycle measurement unit that measures the half cycles; a frequency distribution generator that generates a frequency distribution of the half cycles; a representative value calculator configured to calculate a representative value of a distribution of the half cycles; a correction value calculator configured to calculate a total number Ns and a total number Nwn so as to correct the number of the half cycles, wherein Ns represents the total of the number of the half cycles that are less than 0.5 times the represent value, and Nwn represents the total of the number of the half cycles that are equal to or greater than 2n and less than (2n+2) times the representative value.
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