| 摘要 |
An angular rate sensor structure displaying high immunity to noise and feedback vibration is disclosed. Mounting means (15, 31A) supports by one end each of a pair of vibratory elements (10, 30) in symmetrical alignment about a nodal axis (20). The vibratory elements (10, 30) are driven in a first mode of movement, in direct opposition to one another about the nodal axis (20). Sensing means detect movement of the vibratory elements (10, 30) in directions other than in the first mode of movement resulting from application of external angular rate forces applied to the vibratory elements (10, 30). In one illustrated embodiment the vibratory elements (10) each comprise a pair of rectangular piezoelectric bender crystals (10A, 10B) joined end to end but rotated 90 DEG from one another, whilst in another embodiment the vibratory elements (30A, 30B) are driven electromagnetically in the first mode of movement, and their vibration in other directions is sensed by electromagnetic sensing means (38, 39). |
