CRH high performance MEMS gyroscope for fibre-optic gyro replacement

Outstanding stability and low noise make the CRH01 a viable and more affordable alternative to fibre-optic tuned gyros. The performance is achieved by a new MEMS ring design in Silicon Sensing’s VSG3 technology, ensuring high shock and vibration immunity. The technology uses a ring resonance effect combined with coriolis forces to precisely measure the angular rate. Additional outputs enable the gyros’ temperature and resonant frequency to be used for accurate temperature compensation.

The CRH family covers large measurement range from 400 down to 25°/s, enabling applications such as north finding, direction pointing, drilling guidance, inertial measurement units or rail transportation sensors.

A variant, model CRS39, in the same technology but with temperature range up to 110°C has been developed specifically for down-hole drilling,

Key features:

• FOG like performance
• Lowest range 25°/s up to 400°/s
• Low noise
• Low bias instability of 0.2°/hr in range 25°/s
• Excellent angular random walk 0.04°/hr ^-1/2
• High shock and vibration immunity
• Small size 35x35x25mm

View datasheet