公开(公告)号：US20160327411A1

公开(公告)日：2016-11-10

申请号：US15110759

申请日：2015-03-24

Applicant: DENSO CORPORATION

Inventor： Atsushi KOBAYASHI ,  Kenji CHIKUAN

IPC: G01D5/16

CPC classification number: G01D5/16 ,  G01D5/2457

Abstract: A rotation detection apparatus includes a signal detector and a determination circuit. The signal detector outputs a first signal and a second signal based on changes in respective resistance values of magnetoresistive element pairs. The first signal has a waveform corresponding to convexities and concavities of a rotor, while the second signal has a waveform differing in phase from the first signal. Upon receiving the first signal and second signal, the determination circuit compares each of the first signal and second signal against a binarization threshold value to generate a first binarized signal and a second binarized signal. The determination circuit permits output of the first binarized signal during one of a concavity period and a convexity period of the second binarized signal, and prohibits output of the first binarized signal during the other one of the concavity period and convexity period.

Abstract translation: 旋转检测装置包括信号检测器和确定电路。 信号检测器基于磁阻元件对的各个电阻值的变化输出第一信号和第二信号。 第一信号具有对应于转子的凸度和凹部的波形，而第二信号具有与第一信号相位相差的波形。 在接收到第一信号和第二信号时，确定电路将第一信号和第二信号中的每一个与二值化阈值进行比较，以产生第一二值化信号和第二二值化信号。 确定电路允许在第二二值化信号的凹陷周期和凸部周期之一期间输出第一二进制化信号，并且在凹陷周期和凸部周期的另一个期间禁止第一二值化信号的输出。