Description
The Move Accelerometer SHM can measure the acceleration of the point where it is installed, on the three axes, with high resolution. All of these Accelerometers SHM can be perfectly synchronised with each other. Thanks to this feature it is possible to measure the Vibration Frequencies and carry out a Modal Analysis of the structure. Like other devices, it is full wireless, and the battery lasts for years, in relation to the transmission frequency (timed and/or by threshold exceeding). The move SHM Accelerometer also integrates a temperature sensor inside.
This device is the next and updated version of the Triaxial Acceleration Monitoring sensor. It’s the SHM Accelerometer, an extremely precise three-axis wireless sensor, capable of synchronizing data samples with all the other Accelerometers SHM in the system. Wireless synchronized sampling is a very important feature that gives many benefits during structural monitoring. Thanks to this feature it is possible to carry out the Modal and Vibrational Analysis of any type of structure. Sample rates are variable and remotely configurable. The SHM Accelerometer also maintains the classic activation threshold operation. The battery-powered device has an operating autonomy of up to 8 years and it also has a temperature sensor.
The wireless SHM Accelerometers transmit accurate readings from the site via the LoRaWAN wireless communication protocol via a gateway. You can view and interact with your data online using the Move Cloud Platform.
Key parameters:
- Triaxial wireless acceleration sensor
- Wireless synchronized sampling operation, scheduled sampling operation, trigger operation
- Relative synchronization 500 μs
- Activation threshold operation
- Integrated temperature sensor
- Extremely simple installation with versatile mounting options
- Ultra low noise performance
- Resolution of 15bit (31.25μg, 62.5μg, 125μg), accuracy of ± 62.5 μg and range ± 0.512g, ± 1.024g, ± 2.048g
- Built-in long-life battery
- IP67 waterproof rating
- Firmware is remotely upgradeable over the air via the gateway, reducing costly site visits.
| OPERATION | |
|---|---|
| Activation threshold mode: | Acquisition of 1024 triaxial acceleration samples subsequent to exceeding the activation threshold set by the user. Acquisition of the temperature in correspondence of each event. |
| Planned acquisitions mode (Modal Analysis): |
Acquisition of 8192 triaxial acceleration samples with a fixed rate set by the user (every 1, 2, 6, 12, 24 hours), synchronized between all sensors. Acquisition of the temperature at each event. |
| Custom Operation Software: | It is possible to request custom features that the client deems necessary for their business. |
| Sample Rate: | 40Hz - 80Hz - 160Hz - 320Hz - 640Hz All derived from a 4 kHz sampling by means of downsampling |
| Absolute synchronization: | ± 5 seconds |
| Relative Synchronization (Modal Analysis): | 500 μs |
| MEASUREMENT | |
|---|---|
| Technology: | MEMS technology - Triaxial |
| Acquisition of: | Acceleration and Temperature |
| Resolution: | 15bit (31.25μg, 62.5μg, 125μg) |
| Accuracy: | ±62.5 μg |
| Range: | ± 0.512g, ± 1.024g, ± 2.048g |
| Noise Density: | 22.5 μg/√Hz |
| SAMPLE RATE | BANDWIDTH (-3dB) | THRESHOLD ACQUISITION DURATION | PLANNED ACQUISITION DURATION |
|---|---|---|---|
| 40Hz | 13.5Hz | 25.6s | 204.8s |
| 80Hz | 27Hz | 12.8s | 102.4s |
| 160Hz | 54Hz | 6.4s | 51.2s |
| 320Hz | 108Hz | 3.2s | 25.6s |
| 640Hz | 216Hz | 1.6s | 12.8s |
| Radio | |
|---|---|
| Radio channel: | LoRaWAN communication protocol |
| Radio channel frequency: | ISM 868Mhz |
| Link coverage: | 1km (line of sight with the Gateway)* |
| GENERAL DATA | |
|---|---|
| Waterproof Rating: | IP67 |
| Battery: | 1 lithium battery type “D” 19Ah 3.6V |
| Operating temperatures: | -40°C/+85°C |
| Dimensions: | 75 x 80 x 57 mm |
| Weight: | 1.1 Kg |
| Case material: | Alloy GD-AlSi12 |
| Corrosion resistance: | >1000 hours in salt spray |
| INSTALLATION | |
|---|---|
| Method: | Two-point mounting using screws and plugs (Ø6mm, L:30mm) |
| Site: | Fixing on wall, on ceiling or ground |
| BATTERY AUTONOMY | |
|---|---|
| Operating mode | Estimated service life |
| Activation threshold | 2 years* |
| Planned acquisitions | 3 years* |
* Wireless coverage of the device may vary depending on the scenario.
* Service life is calculated based on the typical scenario, maybe shortened when operating in extreme conditions.
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