Vibration Measure and Alarm for Wind Power

Accelerometer with alarm function for wind turbines

▶ INTRODUCTION

RAM900S Accelerometer is an acceleration sensor independently developed by Rion Technology to

detect vibration and shock. It provides accurate acceleration for the control system through CANopen or

analog interface. The selected capacitive MEMS sensor has the highest operating accuracy, especially at

small amplitudes, where measurement errors due to cross-axis sensitivity are negligible. Therefore, the

RAM900S is ideal for the precise acquisition of vibration, such as vibrations on wind turbine towers. Even

if the accelerometer is mounted on a solid load-bearing machine part, measurement distortions caused

by vibrations can still be excluded. The RAM900S uses a 4th-order low-pass filter to effectively suppress

spurious frequencies, such as those caused by yaw brakes in wind turbines. Not only effectively

compensates for offsets caused by installation errors or temperature drift, but also significantly improves

accuracy. (Configurable: safety relay outputs can be integrated in any safety system and are activated

when specified default limits are exceeded). Four factory-configured frequency bands with different filters

can be fine-tuned according to the requirements of specific equipment types. For wind turbines, the

RAM900S accelerometer is ideal for implementing the safety function "excessive shock and tower

vibration protection". Long-term monitoring can prevent damage or even destruction of equipment. For

the aggressive environment of category C5M, the shell design made of glass fiber reinforced plastic is

the most ideal, and can ensure the long-term and safe operation of offshore engineering equipment. In

terms of product reliability and stability, various measures such as industrial-grade MCU and three-proof

PCB board are also used to improve the reliability of the product.

▶ MAIN FEATURES

★ Compact design

★ Analog and CANopen interfaces

★ Temperature range –40 ... +85 °C

★ 3DB bandwidth 10 Hz

★ Compensates for temperature drift and installation errors

★ IP67 protection level

▶ APPLICATION

★ Anti-sway control of gantry cranes

★ Side sway monitoring of operating platforms

★ Rotation detection of mining bucket excavators

★ Nacelle torsion monitoring of wind turbines

★ Vibration monitoring of large machines and equipment