Sensors

The LSG7ACL-BILH-VIB is a wireless Vibration Meter developed by Worldsensing, designed for long-term, continuous vibration monitoring. It features a tri-axial MEMS accelerometer and advanced edge processing algorithms to detect threshold breaches for parameters such as Peak Particle Velocity (PPV) and frequency.

Key Specifications:

• Sensor Type: 3-axis MEMS accelerometer
• Sampling Rate: 1000 Hz derived from a 4 kHz signal
• Frequency Range: 0.5 Hz to 250 Hz
• Noise Floor: 22.5 μg/√Hz
• Power Source: 3.6 V D-size replaceable battery
• Battery Life: Up to 1.5 years with a 30-minute reporting period, considering a vibration scenario with relevant events triggering alert mode two or three times per week
• Data Transmission: LoRa radio communications (ISM sub-GHz)
• Operating Temperature: -40ºC to 80ºC
• Weather Protection: IP68 rating

Operational Modes:

1. PPV-Based Mode:

   • Reported Parameters: PPVx,y,z (mm/s), fx,y,z (Hz), Temperature (ºC), PVS (mm/s)
   • Velocity Range: 0-60 mm/s (±0.01 mm/s)
   • Frequency Output Range: 1 Hz to 100 Hz (±0.5 Hz)

2. MTVV-Based Mode:

   • Reported Parameters: LAW-x,y,z (dB), Temperature (ºC)
   • Acceleration Range: ±2 g
   • LAW Range: <100 dB (±0.05 dB)
   • Frequency Weighting: Wm

Applications:

The Vibration Meter is suitable for monitoring the impact of vibrations on building integrity and human comfort, complying with industry standards such as DIN 4150-3, BS 7385-2, and ISO 2631-2. It is ideal for construction and mining activities where continuous vibration monitoring is essential.

Mounting Options:

• Surface Mounting: Using the LS-ACC-IN15-HP plate for both horizontal and vertical mounting, fixed with anchor rods or glue.
• Horizontal Surface Mounting: Using the compact LS-ACC-IN-HPTM plate, designed to be glued to the surface for fast and robust fixing.
• Horizontal Surface Mounting with Double Plate: Using the versatile double plate LS-ACC-IN15DP to avoid opening the casing during installation, fixed with glue.

These mounting options ensure precise leveling and secure attachment of the device.

Integration and Configuration:

The device can be configured locally via the Worldsensing App or remotely using CMT Edge for single-net deployments and CMT Cloud for multi-net deployments. It supports seamless integration with various geotechnical and structural instrumentation and monitoring systems.