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Manage vibration with SiteHive Hexanode Vibration

📳 Managing vibration with SiteHive Hexanode Vibration 

Our SiteHive Hexanode Vibration Devices is an all-in-one vibration monitoring device for managing structural and human comfort vibration and ground-borne noise.
SiteHive Hexanode Vibration takes away the complexity, making things clear and simple on every level.

Construction site getting excavated. Heavy plant excavator operating

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SiteHive Hexanode Vibration 📳

Exploded view of SiteHive Hexanode Vibration including SiteHive Mainboard, CAT M1 comms module, vibration board with accelerometers, aluminium enclosure and external antenna

Aspects Vibration
Media3 second detailed waveforms for events over thresholds, 1000 samples per second
Measurements & standardsPeak particle velocity, vibration dose values, ground-borne noise (DIN 4150-3, BS 7385-2), 1KHz sampling rate, ±4g measurement range, 0-250Hz frequency range, tested by NMI in line with ISO 16063 - 21:2003
Power0.28W (10+ weeks on 35aH battery)
Dimensions57mm (H) x 140mm (L) x 130mm (W), 1.1kg, IP68 rated
All Hexanode DevicesSet and forget devices on site, designed for construction self sufficient network connectivity, sends data 24/7, IP68 rated housing, multiple mounting options for all site conditions

Mounting your SiteHive Hexanode Vibration Device

SiteHive Hexanode Vibration devices can be installed quickly and easily on site with short and long spike attachments available as well as adhesive methods. The wide range of configuration options allows for deployment in almost any scenario. The SiteHive Hexanode Vibration features an auto orientation capability which means you don't have to worry about orientating or levelling the device on deployment. As soon as your device is mounted, simply power it on to begin recording and publishing measurements - no configuration required!

Hard Ground 

The SiteHive Hexanode Vibration can be mounted on hard ground surfaces like concrete or rock with short spikes or adhesives. The device's aluminium enclosure is heavy enough to act as an inbuilt base plate which keep it fixed to the measuring surface. Short spikes provide a steady attachment to any uneven hard surface. A sandbag can be placed on top to weigh it down further if required.

SiteHive Hexanode Vibration device with short spikes attachment for hard ground mounting

On even surfaces, the device can be mounted on short spikes (as above) or with adhesives. To follow the adhesive method, first clean the measuring surface to remove any grit or dust. Then cover the measuring surface and the base of the device with gaffer tape. Apply adhesive (contact glue or epoxy) between the tape on the measuring surface and the device. Ensure the device stays secure until the glue sets.

Soft Ground

Soft ground mounting methods should be used on surfaces such as grass or soil.  Long spikes provide solid contact for installations in soft ground. Simply position the device where required and press it into the surface until the entire base of the device is in contact with the ground. The device is built to be durable so do not hesitate to step on it to secure it. 

SiteHive Hexanode Vibration device with long spikes attachment for installation in soft ground

It may be necessary to remove loose material or topsoil to get the best connection. The enclosure is IP68 rated so it can be safely buried if required. 

Walls and Heritage Structures

The device can be mounted on vertical surfaces and heritage structures with a combination of tape and adhesive. This method minimises damage caused by traditional wall mounting methods e.g. stud mounting which require drilling.

SiteHive Hexanode Vibration device orientated vertically for wall mounting with adhesives. The external antenna is exposed and pointing upwards

First clean the measuring surface to remove any grit or dust. Then cover the measuring surface and the base of the device with gaffer tape. Apply adhesive (contact glue or epoxy) between the tape on the measuring surface and the device. Ensure the device stays secure until the glue sets. If adhering to a wall, this may mean securing the device with extra tape which can be removed once the device is anchored.

Peak Particle Velocity (PPV)

(Structural Damage)

Velocity is how far the monitor has moved in a period of time, in a given direction. It's usually measured in millimetres per second and expressed as a Peak Particle Velocity (PPV) for a given time period. The graph below shows the PPV each minute over the course of a day:

SiteHive vibration graph for structural damage. Peak Particle Velocities displayed in mm/s for vSum, X Peak, Y Peak and Z Peak with a thresholds and exceedances setup

Events shown on the graph are Waveforms Events, which can be investigated, and explained, in SiteHive. 

Waveform events 

(Structural Damage)

Waveform events generate detailed summaries of movement where the peak velocity crosses a threshold (set on the device), for a short time period. Not only is the velocity important, but also what frequency of wavelength caused that movement. 

SiteHive provides visual summaries of these waveform events, which can then be explored in detail, comparing the time-series plot of the velocity of the event on the left, with the frequency at peak on the right, plotted against the DIN-4150:3 standard. Waveforms can also be explained in SiteHive, for your full system of record. 

Vibration Waveform or Trace triggered by an exceedance. The waveform precisely shows the profile of a vibration exceedance by breaking it into millisecond granularity and splitting into three axes. The peak velocity and frequency at peak are displayed on a separate frequency vs velocity graph plotted against the DIN 4150-3 standard

Frequency vs Velocity 

(Structural Damage)

The SiteHive Frequency vs Velocity graph (shown below) shows the dominant frequency of each peak record across the whole day (in this case, the peak each 15 minutes), plotted against the DIN-4150:3 standard

The DIN-4150 standard is important in this context, as the tolerance of the standard increases as the frequency of the vibration increases, and there are different tolerances for sensitive (e.g. heritage), residential and commercial receptors. 

SiteHive frequency vs velocity scatter plot colour coded by axis. The thresholds for commercial, residential and sensitive structures specified in DIN 4150 are plotted for comparison

Vibration Dose Value (VDV)

(Human Comfort)

Individuals can detect building vibration values that are well below those that can cause damage to the building or its contents. The level of vibration that affects amenity is lower than that associated with building damage. Where occupants can detect vibration in buildings, this may potentially impact on their quality of life or working efficiency. In contrast, people tolerate much higher vibration values in vehicles than in buildings.

As such, Vibration Dose Value (VDV) is used as a measure to assess intermittent vibration. VDV accumulates the vibration energy received over the daytime and night-time periods, and is calculated based on acceleration values. Velocity can be used, but is more of an approximation. 

If your device is sending VDV values to SiteHive, you can turn on the VDV settings in Site Details > Manage Device for that device: 

SiteHive Device Management Page with toggle to Vibration Dose Value graph if your vibration monitor is reporting those values

When turned on, SiteHive Enviro Pro will automatically process this data, and calculate the cumulative sum for the day. SiteHive's application of VDV calculations, thresholds, and day/night periods are determined in Assessing vibration: a technical guideline. The VDV graph, shown below, shows the cumulative VDV value, which is reset each day/night period:SiteHive representation of Vibration Dose Value which accumulates across a period then resets at daytime and night timeWhilst these graphs on the SiteHive Enviro Pro Dashboard are useful for managing the impacts in real-time, over longer periods they aren't useful, as the values for each period have already been determined. As such, in the SiteHive Enviro Pro Reporting > Stats & Analysis page, daily results are shown for the selected period in a concise summary table. Each row highlights the total value for that day's night time (ending that day), and daytime period: 

SiteHive vibration stats and analysis page displaying VDV summary statistics for each monitoring point

The axis (X/Y/Z) that recorded the highest value is shown next to each result. These tables also appear in any PDF Reports generated, if the VDV options are turned on (in Device Details) and selected in the Report Configuration: 

SiteHive PDF Report configuration window showing toggleable options for stats cards, daily maximums table and vdv statistics

Where to locate your Hexanode Vibration Calibration Certificate

The Hexanode Vibration provides measurements in line with various international standards, for both structural monitoring (DIN 4150-3 & BS 7385-2), and human comfort (DIN 4150-2). The Hexanode Vibration is calibrated in line with ISO/IEC 16063-21:2003.

An image of the SiteHive Enviro Dashboard, with a vibration tile highlighted as well as the 'manage vibration' button.

An image of the manage vibration window, with the details tab selected.

Connect a third party vibration device

If you have your own third party vibration device, you can contact us to to connect them. We can connect a wide range of suppliers, including

Whilst not all devices are created equally, SiteHive can process any vibration monitoring data via a number of methods, including API connections, s/ftp transfer, and even email integrations.