| タイトル | Twin-capacitive shaft angle encoder with analog output signal |
| 本文（外部サイト） | http://hdl.handle.net/2060/19770024460 |
| 著者（英） | Wilson, R. L.; Hruby, R. J. |
| 著者所属（英） | NASA Ames Research Center |
| 発行日 | 1977-08-02 |
| 言語 | eng |
| 内容記述 | A precision capacitive shaft encoder providing a dc signal corresponding to the angular position of a shaft is described. Two variable capacitances are coupled in tandem by a rotatable shaft. Each capacitor has a capacitance that varies linearly with a change in the angular position of the shaft. The sum of the two capacitances is always constant for any angular position of the shaft. Each capacitance is alternately coupled to a reference dc voltage and a discharge circuit. The capacitances are electrically coupled in series and the charge periodically acquired at the junction of the capacitance is a function of the position of the shaft. An error-compensating voltage is imposed on the junction when the capacitances are coupled to the reference voltages. The junction is coupled to sample-and-hold apparatus provided with a error-correcting circuit. |
| NASA分類 | ELECTRONICS AND ELECTRICAL ENGINEERING |
| レポートNO | 77N31404 |
| 権利 | No Copyright |
