Gyros

Gyroscope is a sensor that measures the posture, position and orientation of things moving in three-dimensional space.

Tamagawa-Seiki started manufacturing gyroscope for aircraft or vessel in 1942, and has developed variety of products. In recent years, the usage of gyroscope is extended into automated vehicle, construction site, factory automation, etc.

What is MEMS GYRO Sensor?

• Gyro sensor detects an angular velocity per unit time.

• It is also known as Gyroscope or (Angular) Rate Sensor.

• Accuracy is expressed in unit of “deg/sec” or “deg/h”.

• Angle position is calculated by integrating the angular velocity.

Gyro Sensor Line-up

Principle of MEMS Gyro

When the angular velocity is applied to a mass with a speed, the Coriolis force occurs in the direction at a right angle to both speed direction and rotation axis.

Our MEMS gyro vibrates the element in the shape of a tuning fork and detects the electricity produced by change of vibration mode by Coriolis force applied from rotational motion with the electrode which is placed on the sensor element.

Principle of FOG (Fiber Optic Gyro )

A fiber optic gyroscope (FOG) detects the changes in orientation using the interference of light, which is created by two beams injected into the same fiber in opposite directions. The angular velocity is translated as the pattern of interference which is measured.

Principle of RLG (Ring Laser Gyro)

A ring laser gyro (RLG) consists of a optical resonator, laser mirror & narrow glass tubule, where two laser beam are generated in CW and CCW by discharge of He-Ne. When the angular velocity is applied, a displacement of frequency of laser beam is made on a principle of Sagnac effect. A ring laser gyro (RLG) measures the displacement by counting a number of prismatic interference fringes.