| 摘要 |
PURPOSE:To improve temperature sensitivity characteristics by setting the input resistance of a preamplifier which receives the output of a piezoelectric element almost to 1/Comega (where C is the electrostatic capacity of the piezoelectric element and omega is the oscillation angular speed of a tuning fork mass part). CONSTITUTION:The angular of deviation of a tuning fork system around an input axis is converted by the piezoelectric element 30 into an electrical signal, which is amplified by a preamplifier 35; and its amplification output and the signal of an AC signal source are inputted to a demodulator. Then, the output of the preamplifier 35 is rectified synchronously to obtain a voltage proportional to an angular speed. Then, the resistance value R of the input resistance 35-1 of the preamplifier 35 is set to R 1/Comega to remove errors due to the electrostatic capacity C of the piezoelectric element 30 and temperature characteristics of a coefficient of electromechanical coupling, improving temperature sensitivity characteristics. |
