Structural Health Monitoring (SHM) / 結構健康監測






Guided ammunition / 制導彈藥
Accelerometer for missile guiding systems / 加速度導彈導向系統
Dynamic GPS tracking systems / 動態GPS跟踪系統
Dynamic platform stabilization / 動態平台穩定
Ground motion detection / 地面運動檢測
AHRS MEMS accelerometers / (AHRS)加姿態航向參考系統,MEMS加速度計
Inertial Navigation Systems / 慣性導航系統
Helicopter Attitude, Heading and Reference System (AHRS) / 直升機姿態,航向參考系統(AHRS)
Active Suspension Systems / 主動懸掛系統
Active Tilting Systems / 主動傾斜系統
Bogie Monitoring Systems / 轉向架監測系統
Train Positioning Systems / 列車定位系統
Wind Turbines / 風力發電機
Drilling sensor / 鑽孔傳感器
Static Antenna Stabilization / 靜態天線穩定
Automotive testing accelerometer / 汽車加速度檢測
Machine Health Monitoring (MHM) / 機器健康監測
Structural Health Monitoring (SHM) / 結構健康監測
Inclination monitoring / 傾斜角監控
Seismic Detection / 地震探測


Structural Health Monitoring (SHM) / 結構健康監測

Today, the society has built an innumerable amount of buildings, with sometimes complex architecture designs. Long-term monitoring, also known as SHM, has a high degree of importance when the structures are subject to heavy physical loads, aging, and other external factors (e.g. corrosion, seismic damage). It involves the installation of many sensors fixed to critical areas in order to track internal strains, microscopic deformations and frequency responses.

Performance Required

Wireless sensors communicate through radios and need a source of energy to operate correctly. To increase the durability of the system, the power consumption of each component – including the accelerometer – should be as low as possible.

A small bias derivation improve the overall reliability of the sensor: each day, they endure thermal variations and frequent switches, generating new errors after each measurement. It is key to perform recalibration and have stable sensors in order to avoid false alarms.

The Appropriate Technology

The number of sensors partially depends on the configuration and on the duration of the monitoring. Piezoceramic sensors were the first to be selected for standard SHM. They have a very large frequency bandwidth, however they cannot measure DC signals. Wired SHM and crash testing are typical applications where piezo sensors are implied.
More recently, MEMS capacitive accelerometers (VC) proved to offer good advantages, due to its simple yet efficient design. They need a very small current to operate, as they function in an open loop configuration. MEMS VC sensors are ideal for wireless long term monitoring, as they offer portability, reliability and durability. Furthermore, piezo and VC sensors can be combined to increase their overall performances.

Colibrys’ Sensors

Colibrys offers the VS1000 series, a family of high performance, open loop vibration sensors. This MEMS product has one of the largest frequency bandwidth, capable of measuring signals typically from DC 0 Hz to 2500 Hz at ±5% FS, and up to 7000 Hz at ±3 dB. The ranges considered for SHM would be ±2g, ±5g, and ±10g. With a spectral density down to 7 µg/√Hz, and a non-linearity of 0.1% FS, the VS1000 is considered as the most accurate vibration sensor made by Colibrys. It is estimated that it can function during 11 months, as long as it is powered by two AA batteries .


上次更新日期: 2022年08月03日。