Detection apparatus, detection method, and electronic apparatus

Details Detection apparatus, detection method, and electronic apparatus Detection apparatus, detection method, and electronic apparatus

2008-05-08

2011-10-11

Kwok, Helen C. (Department: 2856)

Measuring and testing

Speed, velocity, or acceleration

Angular rate using gyroscopic or coriolis effect

C073S504150

Reexamination Certificate

active

08033171

ABSTRACT:
A detection apparatus is provided which includes a cantilever vibration gyro including a piezoelectric element having a first side provided with a drive electrode and a pair of detection electrodes sandwiching the drive electrode with predetermined gaps therebetween and a second side opposed to the first side and provided with a common electrode, which vibrates by a drive signal input between the drive electrode and the common electrode and generates a pair of detected signals corresponding to Coriolis force from the detection electrodes. The detection apparatus also includes a bias applying section for applying a bias voltage to the detection electrodes, an adding section adding the pair of detected signals, a first phase delay section delaying a phase of the detected signal obtained by the addition by a range larger than 45° and smaller than 90°, and an amplitude control section controlling the delayed detected signal to a predetermined voltage amplitude to output as the drive signal.

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