| 摘要 |
The invention concerns a transducer for measuring an angular velocity formed by a single piezoelectric tuning fork ( 21 ) that rotates at said angular velocity. The tuning fork includes two vibrating legs( 23, 24 ) extending from a base ( 22 ), means ( 25 a, 25 b, 26 a, 26 b) exciting a first vibration of the tuning fork, arranged on the excitation leg ( 23 ), and means ( 27 a, 27 b, 28 a, 28 b) detecting a second vibration of the tuning fork generated in response to the first vibration and to a rotation of the tuning fork, arranged on the detection leg ( 24 ). The detection leg has a cross-shaped section including two top lateral faces ( 33, 34 ) and two bottom lateral faces ( 37, 38 ), separated by protruding parts ( 41, 42 ) projecting with respect to said faces. The detection means include first ( 27 a) and second ( 28 a) detection electrodes arranged facing each other, each being arranged on one of the top lateral faces ( 33, 34 ), such that the electrical field between the first and second detection electrodes is substantially rectilinear through the detection leg, and third ( 27 b) and fourth ( 28 b) detection electrodes arranged facing each other, each being arranged on one of the bottom lateral faces ( 37, 38 ), such that the electrical field between the third and fourth detection electrodes is substantially rectilinear through the detection leg.
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