Silicon Sensing has confirmed that it will be exhibiting new compact MEMS-based products at the 2022 Oceanology International trade show in London. These products include what Silicon Sensing claims is the highest-performing silicon MEMS inertial measurement unit (IMU) on the market, as well as two inertial sensors designed to deliver enhanced performance in the toughest marine environments.
The DMU41 is a non-ITAR, high-performance, tactical grade IMU measuring just 50x50x50mm and weighing less than 200g. It also consumes significantly less power than its predecessor, the DMU30, yet delivers a performance that competes directly with heavier, larger, and more costly, fibre optic gyro-based products. This IMU is ideal for control of marine unmanned systems such as AUVs (autonomous underwater vehicles).
The CRH03 is a compact, stand-alone single axis gyro designed for tasks such as maritime platform stabilization, guidance and control and precision surveying. It is also non-ITAR restricted and features significantly lower power consumption than its predecessor (30% less than the CRH02). The CRH03 incorporates new drive electronics and improvements to the sensor head that make it highly tolerant to external vibration and able to deliver comparable bias characteristics to FOG (fibre-optic gyros) and DTG (dynamically tuned gyros). It is available in five rate ranges, including a new option of 10 degrees per second.
The CRS39A gyro, developed for use in applications such as downhole drilling and north finding, is an upgrade to the established CRS39 and is also a non-ITAR product. It has a 40% lower volume, achieved by moving to a single board from two, meaning it is far more easily installed in space-limited applications. Upgraded micro electro-mechanical systems (MEMS) and electronics deliver significantly improved bias instability, angle random walk and noise and vibration tolerance whilst multiple on-board temperature sensors mean performance can be specifically tuned to the rigours of the most extreme operating environments.
Steve Capers, General Manager of Silicon Sensing, commented: “Silicon Sensing specialises in compact, high-performance inertial sensors and systems. In the DMU41 our engineering team has achieved an extraordinary 54% reduction in volume and a 42% lowering in weight compared with the previous generation IMU. These are dramatic reductions and mean DMU41 brings real, sustained precision motion sensing to the most compact marine platforms and the most restricted applications for the first time.”
“With each of these new devices we are bringing new choices and opportunities for operators in the marine sector where there is a constant drive for better and more sustained performance in ever-more extreme surface and subsurface conditions.”