发明名称 |
ACCELERATION SENSOR CIRCUIT |
摘要 |
An acceleration sensor circuit 1 of the invention includes an acceleration sensor 11 having a first capacitor C1 whose capacitance changes according to a position of a first movable electrode and a second capacitor C2 whose capacitance changes as opposed to the first capacitor according to a position of a second movable electrode moved together with the first movable electrode, a first circuit 15A for generating a sinusoidal AC signal of a predetermined frequency, a second circuit 12 for generating a signal according to the positions of the movable electrodes, and an arithmetic circuit 14 for analyzing data in which a signal generated by the second circuit 12 is encoded and outputting data of acceleration. |
申请公布号 |
US2014230551(A1) |
申请公布日期 |
2014.08.21 |
申请号 |
US201214348075 |
申请日期 |
2012.09.28 |
申请人 |
AKEBONO BRAKE INDUSTRY CO., LTD. ;JAPAN OIL, GAS AND METALS NATIONAL CORPORATION |
发明人 |
Kunimi Takashi;Sekine Toru |
分类号 |
G01P15/125 |
主分类号 |
G01P15/125 |
代理机构 |
|
代理人 |
|
主权项 |
1. An acceleration sensor circuit comprising:
an acceleration sensor including a first capacitor whose capacitance changes according to a position of a first movable electrode, and a second capacitor whose capacitance changes as opposed to the first capacitor according to a position of a second movable electrode moved together with the first movable electrode; a first circuit for generating a sinusoidal AC signal of a predetermined frequency for being applied to the first capacitor and the second capacitor in mutually opposite phases; a second circuit for generating a signal according to the positions of the first movable electrode and the second movable electrode based on a difference between a capacitance of the first capacitor and a capacitance of the second capacitor and the sinusoidal AC signal applied to the first capacitor and the second capacitor; and an arithmetic circuit for analyzing data in which a signal generated by the second circuit is encoded, extracting a signal of a frequency component of substantially the same frequency as the predetermined frequency from the data, and outputting data of acceleration based on the extracted signal. |
地址 |
Chuo-ku, Tokyo JP |