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Structural Health Sensors

Structural Health Sensors

Structural Health Sensors

Product catalog summary
Introduction
The Structural Health Sensors V1.0 are designed for permanent outdoor structural monitoring, combining a 2-axis accelerometer with a temperature sensor. They feature enhanced surge protection and electromagnetic interference immunity, suitable for tall outdoor structures. These sensors operate in extreme conditions from -40°C to +85°C and are dust and watertight to IP66 standards.

Key Features
  • 4-20 mA current loops for signal immunity and long cable runs.
  • Enhanced surge protection.
  • Capability to measure down to DC for low-frequency structural modes.

Key Benefits
  • Robustness to environmental conditions.
  • Suitable for short-term or permanent long-term monitoring.
  • Effective for monitoring remote areas.

Field of Applications
The sensors are ideal for monitoring slender structures like telecommunication towers, chimneys, and elevated water reservoirs, which are sensitive to dynamic wind loading. Monitoring helps in evaluating structural integrity and preventing damage.

Technical Characteristics
  • Acceleration range: ±5 g with sensitivity at 1.586 mA/g at 25°C.
  • Temperature measurement range: -40 to +85°C with accuracy from -0.15 to +0.15°C within 0 to 70°C.
  • Power supply: 20-28 VDC, 20-80 mA.

Certifications
  • Emission standards: EN 55011 and FCC 47 Part 15.
  • Immunity standards: EN 61000 series for electrostatic, radiated, and conducted disturbances.
  • Operating temperature standards: IEC 60068 series.

Ordering and Customization
Options for different resolutions, special coatings, cables, and integration with monitoring systems are available. Custom adaptations for underwater use can also be provided.

Contact Information
Micromega Dynamics, Rue du Trou du Sart 10, B-5380 Fernelmont, Belgium. Tel: +32(0)81248100, Email: [email protected], Website: www.micromega-dynamics.com
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Catalog excerpts

Structural Health Sensors-1

STRUCTURAL HEALTH SENSORS STRUCTURAL HEALTH SENSORS SENSORS SPECIFICALLY MADE FOR PERMANENT OUTDOOR STRUCTURAL MONITORING The Structural Health Sensors combine a 2-axis accelerometer with a temperature sensor. Their enhanced internal surge protection and electromagnetic interference immunity makes them particularly suitable for the permanent monitoring of tall outdoor structures. The Structural Health Sensors can perform measurements in extreme conditions ranging from -40°C to +85°C. They are of course dust and watertight to IP66. We have a proven track record of several thousands of such sensors operating reliably around the world..

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Structural Health Sensors-2

FIELD OF APPLICATIONS Monitoring of Slender Structures Slender structures, such as telecommunication towers, chimneys and elevated water reservoirs can be very sensitive to dynamic wind loading. Indeed, wind-induced forces can cause significant dynamic response which may lead to structural damages. In the case of telecommunication towers, they can also lead to signal transmission distortion. Therefore, design criteria for slender structures must include dynamic stiffness which depends on the main resonances frequencies and inherent structural damping. These characteristics must be measured when...

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CHARACTERISTICS Acceleration Channel Characteristics – High Resolution Test Condition Sensitivity change with Temperature Zero-g level Zero-g level change with Temperature 2 order low-pass filter cutoff frequency (1) Cross Axis Sensitivity nd Non-linearity Acceleration noise density Sensitivity can be easily derived from 2 measurements at +1g and -1g as accelerometers measure DC Acceleration Channel Characteristics – Standard Resolution Test Condition Sensitivity change with Temperature Zero-g level Zero-g level change with Temperature 2 order low-pass filter cutoff frequency (1) Cross Axis Sensitivity...

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Temperature Channel Characteristics Test Condition Measurement range Accuracy Temperature noise density 2 order Butterworth low-pass filter cutoff frequency Temperature Sensor Response Curve Power Supply Test Condition

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REFERENCE DIRECTIONS

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CERTIFICATIONS Electromagnetic Compatibility Limit / Level Emission Radiated Emission Radiated Emission Electrostatic Immunity Electrical fast transient / burst immunity Immunity to conducted disturbances, induced Criterion A by radio-frequency fields Power frequency magnetic field immunity Short duration field 100A/m 50 & 60Hz Criterion A Operating Temperature Limit / Level Cycling between -40°C and +85°C Operation at -40°C (including cold start)

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ORDERING REFERENCE NOTE When ordering with cable connections, the cable is mounted at the factory. Please specify required length. Standard cable gauge is 0.25 mm² (AWG24). Higher cable gauge might be required for long cable runs. ENGINEERING SERVICES • • • • Other resolutions and/or measurement ranges Special coatings Special cables Integration with monitoring systems and cloud platform • Adaptations for underwater use Rue du Trou du Sart 10 B-5380 Fernelmont | Belgium EU ID.:BE0466034916 [email protected] www.micromega-dyna

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