| 摘要 |
PROBLEM TO BE SOLVED: To obtain a vibrational gyro which can eliminates the drift components by using a simple circuit, without individually correcting the temp. characteristics of vibrators. SOLUTION: The vibrational gyro comprises a vibrator 22 composed of a vibrator body 24 and piezoelectric elements 26a-26c output signal of which are inputted to an oscillator circuit 38 composed of an inverted amplifier circuit 40 and AGC circuit 42 through buffer circuits 36a, 36b to obtain a driving signal to be inputted to the piezoelectric element 26c. Output signal of the buffer circuits 36a, 36b are inputted to a detector circuit 44 composed of a differential circuit 46, synchronous detector circuit 48, smoother circuit 52 and d-c amplifier 54. The synchronous detector circuit 48 detects the output signal of the differential circuit 46 synchronously with a reference signal from a phase shifter circuit 50 which comprises a thermosensitive element to adjust the phase of the output signal of the inverted amplifier circuit 40 according to the temp. to provide a reference signal. |
