High precision gyroscopes

Precision Angular Rate Sensors – High-Accuracy Measurement of Rotational Motion

Gyroscope sensors are used to measure rotational motion, angular velocity, or rotation rate (°/s) without requiring a fixed reference point. This distinguishes gyroscopes from other instruments that measure rotational position, such as rotary encoders or rotational potentiometers. Thanks to advanced silicon MEMS sensor technology, our high-precision gyroscopes enable accurate measurement of rotational speed even under harsh conditions and high temperatures. Gyroscopes are an integral part of systems used for stabilizing platforms, robots, and aerial objects such as drones.

In addition to high-precision gyroscopes, we also offer:

• Standard gyroscope sensors: MEMS-based gyros with 1, 2, 3, or 6 axes for industrial and OEM applications, offering accuracy and cost efficiency. Measurement range: 100°/s and 200°/s.
• Inertial measurement systems: IMU platforms (Inertial Measurement Units) with three accelerometers and three gyroscope sensors for navigation applications. Measurement range: ±75°/s to ±900°/s.
• Embedded gyroscope sensors: Designed for direct system integration – space-saving, robust, and cost-efficient. Measurement range: ±25°/s to ±900°/s.

How Precision Angular Rate Sensors Work

Precision angular rate sensors typically operate based on the Coriolis effect or use optical methods such as fiber optic gyroscopes (FOG) or other highly accurate measurement principles. They detect rotational speed through the phenomenon of Coriolis force. In our gyroscope sensors, a vibrating or resonating ring is used, manufactured from silicon using a DRIE (Deep Reactive Ion Etching) process. This ring is suspended by eight pairs of symmetrical spokes. The bulk silicon etching process and the unique, patented ring design provide specific geometric properties with tight tolerances for precise balancing and thermal stability.

In MEMS or vibrating gyroscopes, a vibrating structure is used within the sensor. When the sensor rotates, the Coriolis force acts on this structure, altering its vibration. This change is measured and converted into an electrical signal proportional to the angular velocity.

In highly precise systems, such as fiber optic gyroscopes, the phase shift of light within an optical fiber is measured to detect rotational movement with extreme accuracy.

These technologies enable:

• Very low bias drift
• High resolution
• Excellent repeatability
• Stable measurement values over long periods

How Do They Differ from Other MEMS Gyroscopes?

Unlike conventional MEMS gyroscopes, our sensors do not have narrow gaps that can cause interference or stiction issues. This results in superior performance: bias and scale factor remain more stable over a wider temperature range. Additionally, they offer greater resistance to vibration and shock. Another key advantage of this design is its inherent insensitivity to acceleration-induced rate errors.

Typical Applications

Precision angular rate sensors are primarily used in high-end applications:

• Navigation systems (INS / IMU)
• Aerospace
• Defense and security applications
• Platform stabilization
• Robotics and autonomous systems
• Geodetic measurement systems
• Precision measurement technology
• Research and development

Advantages of Precision Angular Rate Sensors

• Highest measurement accuracy
  Ideal for applications with the most demanding requirements for precision and repeatability.
• Very low drift (bias stability)
  Reliable measurement results even during long-term operation.
• High resolution and sensitivity
  Capable of detecting even the smallest rotational movements.
• Stable performance under challenging conditions
  Suitable for demanding environments such as temperature variations or vibrations.
• Integration into complex measurement systems
  Perfect for IMU, INS, and advanced navigation systems.

How to Choose the Right Precision Angular Rate Sensor

Selecting a suitable precision angular rate sensor depends heavily on the specific requirements of the application. Especially for high-accuracy measurements, careful alignment of sensor parameters is essential to ensure reliable results.

• Bias stability and drift behavior
  For high-precision applications—especially in navigation or long-term measurement systems—minimal bias drift is critical. High bias stability ensures that measurement values change only minimally over time.
• Measurement range (angular velocity)
  The sensor must be designed for the expected rotational speeds. Excessively large measurement ranges can reduce resolution, while ranges that are too small may lead to saturation.
• Resolution and noise performance
  Low noise levels and high resolution are essential for reliably detecting even the smallest movements. This is particularly important in precise control or stabilization systems.
• Technology (MEMS, FOG, etc.)
  Different technologies offer specific advantages depending on the application: MEMS sensors for compact and cost-efficient solutions, fiber optic gyroscopes (FOG) for maximum accuracy and minimal drift. The choice of technology significantly impacts overall system performance.
• Environmental conditions
  Temperature ranges, vibration, mechanical stress, and electromagnetic influences can affect measurement accuracy. For demanding environments, robust and temperature-compensated sensors should be selected.
• System integration and interfaces
  Beyond sensor performance, interfaces (analog, digital, CAN, etc.) and ease of integration into existing systems are key considerations. Suitable signal processing and seamless integration save time and improve system reliability.

We are happy to support you in selecting the optimal precision angular rate sensor—from initial requirements to full integration into your measurement system. Feel free to contact us!