![]() ![]() The conventional tuning-fork type gyro-sensor shown in FIG. 4 shows the overall view of a tuning-fork vibration gyro-sensor described in Japanese Patent Laid Open No. ![]() 11-37761 discloses four examples of prior art tuning-fork type gyro-sensors. A tuning-fork type gyro-sensor is simple in structure and can be compact, so that it can be used in cameras as a detector for steadying an image and in a car navigation system. ![]() BACKGROUND OF THE INVENTIONĪ tuning-fork type gyro-sensor utilizing the Coriolis force is widely used as a sensor to detect the rotation of an object. The present invention relates to a vibration gyro-sensor utilizing the Coriolis force. The piezoelectric vibration gyro-sensor according to claim 1, wherein said tuning fork type vibrator is characterized by a single major crystal axis. The piezoelectric vibration gyro-sensor according to claim 1, wherein said primary electrodes and said secondary electrodes are formed on an X-cut surface.ħ. The piezoelectric vibration gyro-sensor according to claim 1, further comprising: two oscillation circuits and a detector comprising a first frequency detector, a second frequency detector, a differential amplifier, and a synchronous detector.Ħ. The piezoelectric vibration gyro-sensor according to claim 1, further comprising: two oscillation circuits and a detector comprising a frequency mixer, a frequency detector, and a synchronous detector.ĥ. The piezoelectric vibration gyro-sensor according to claim 1, wherein said primary electrodes are drive electrodes and said secondary electrodes are IDT electrodes.Ĥ. ![]() The piezoelectric vibration gyro-sensor according to claim 1, wherein: said tuning fork type vibrator is made of a X-cut quartz crystal and a longitudinal direction of said arms is parallel with a Y-direction of an axis of said quartz crystal.ģ. A piezoelectric vibration gyro-sensor comprising: a tuning fork type vibrator comprising: two rectangular-columnar arms integrated with a base to support lower ends of said arms primary electrodes on each of said two arms and secondary electrodes of a surface acoustic wave element on each of said two arms, wherein: two pairs of said primary electrodes are provided on each said arm, said primary electrodes of each said pair of said primary electrodes on each said arm face each other, and each said pair of said primary electrodes are arranged in parallel at a given distance on said arms each said secondary electrode of said surface acoustic wave element is provided between said primary electrodes at said lower ends of said arms.Ģ. Rail measurement and rail-tilt compensation systems.1.Active Heave Compensation Applications.Stabilization of Pointing and Directional systems.Platform Stabilization of optical systems and payloads, or other sensitive systems on Airborne, Land-based or Marine platforms.The GI-CVG-A2321D is particularly suited to the following applications: This electromechanical system is key to the very low output noise, and facilitates the large dynamic range required in several demanding applications. A closed-loop electronic system is used to control the standing wave oscillation in the resonator, and to null the effects of Coriolis forces induced by the rotation of the resonator, providing as output a signal which is proportional to the gyroscope angular rate. The oscillations in the resonator are generated and detected by piezo-electric actuators, which are attached to the base of the resonator. The protective case which contains the resonator is called a Sensitive Element (SE), and there is one such SE per axis in all CVG gyroscopes. Solid-state Coriolis Vibrating Gyros are based on the control of standing waves in a physical body, called a resonator which is housed within a protective case. ![]()
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