Angular speed measuring transducer

A transducer for measuring an angular velocity formed by:

• a single piezoelectric tuning fork that rotates at said angular velocity,
• said tuning fork including first and second vibrating legs extending from a base, each leg having two main top and bottom faces and two lateral faces,
• means for exciting a first vibration of the tuning fork, arranged on one of the two legs, called the excitation leg,
• means for detecting a second vibration of the tuning fork generated in response to said first vibration and to a rotation of the tuning fork, arranged on the other of the two legs, called the detection leg,
• wherein said detection leg includes at least one first groove on said top face and at least one second groove on said bottom face, said first and second grooves each having lateral flanks, and
• wherein said detection means include first and second detection electrodes arranged facing each other, the first detection electrode being arranged on one of the lateral flanks of said first groove, the second detection electrode being arranged such that the electrical field between the first and second detection electrodes is substantially rectilinear through the detection leg, and third and fourth detection electrodes arranged facing each other, the third detection electrode being arranged on one of the lateral flanks of said second groove, the fourth detection electrode being arranged such that the electrical field between the third and fourth detection electrodes is substantially rectilinear through the detection leg.