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ATLAS-F: MULTICHANNEL DATALOGGER
Categories:
Digitizers Daqs, Monitoring
REQUEST FOR PRICING
ATLAS-F is a variant of the ATLAS digitizer that was designed following a customer’s request. Compared to standard ATLAS it offers accessible/removable SD and SIM card slots, hot-swappable dual-slot batteries and the repositioning of all the connectors on one side.
The ATLAS-F is easily transportable in flights, the user can take out the batteries and transport them in the cabin. In addition, the dual battery slot is also useful when ATLAS-F is used for long-term monitoring as the batteries can be replaced one by one without turning off the instrument.
The purpose of positioning the connectors on one side is that the cables are easier to keep in order when the instrument is installed in a box and to save space.
ATLAS-F is available with 3,6 or 9 differential input channels for external sensors.
Description
EXCELLENT PERFORMANCE
The instrument is equipped with high-resolution delta-sigma 24bit ADCs, all the channels are synchronized and the sample rate is adjustable up to 1000 sps per channel. The internal memory (up to 1TByte) has two independent recording zones: the ring-buffer zone which is dedicated to continuous sampling, and the triggering zone which is used for event sampling.
The data format is MiniSEED.
The built-in GNSS receiver synchronizes the system clock with the absolute time so that a network of several units can be created where all the channels are synchronized.
EASY TO USE
You can control ATLAS-F locally via network connection (LAN or WiFi), and remotely using the integrated 4G modem (optional). The SIM card is in micro format which is accessible to the user from the top panel.
Thanks to SeedLink protocol ATLAS-F is compatible with most popular seismic analysis software (Seiscomp3, Antelope, Earthworm).
INTEGRATED UPS
The large capacity internal back up battery guarantees long term recording in the absence of an external power supply (typically 40hrs). This feature is greatly appreciated by customers because it is like having an integrated UPS, which saves space and money; both the 4G modem and the external sensors’ power supply is backed up by the internal battery.
The power supply ranges from 9 to 28 Volt DC and it can be connected to the electric power network using the power supply adapter included.
ATLAS-F can also be connected directly to a solar panel.
ROBUST
The anodized aluminum (INOX AISI316 option) enclosure is CNC milled, shockproof, vibration-resistant weather-resistant IP67.
KEY FEATURES
| ATLAS-F |
|---|
| ADC resolution 24 bit |
| Dynamic range > 136dB@100 sps |
| Sampling rates 1, 20, 25, 50, 100, 200, 250, 500 , 1000 sps synchronous |
| Lan, Wi-fi and 4G modem |
| Built-in GNSS receiver |
| Integrated Ups, 40hrs system autonomy |
| Miniseed Data Format |
| Compatibility with Earthworm, Seiscomp, Geopsy, Seisgram2k |
Application
ATLAS-F is designed to suit various applications and provide a solution to the users needs in the field.
LONG-TERM OR SHORT-TERM MONITORING
ATLAS-F can be used with an accelerometric or a velocimetric sensor.
ATLAS-F can be configured in-situ using WIFI or LAN cable.
If ATLAS-F is used for permanent monitoring, it can be reached remotely using the built-in 4G modem or using LAN connection in order to link it, for example, to an ADSL modem.
LARGE STRUCTURE MONITORING
ATLAS-F is well suited to the monitoring of large structures where multiple sensor information is required.
In such applications sensors are wired up to ATLAS-F and with each device you can acquire up to 9 synchronous channels.
If more channels are needed, connection to an other ATLAS-F device and synchronization with the MASTER is possible. ATLAS-F can be reached locally via WiFi or remotely using the buit-in HSPA modem or by LAN.
STRUCTURAL MONITORING
ATLAS-F is often used in the filed of structural monitoring for calculating the specific resonant frequency of the buildings.
Lunitek has developed ad-hoc firmware based on FFT for real time evaluation of the building’s state of health.
MONITORING STATION
In a typical geophysical monitoring station ATLAS-F is used with a low noise force balance triaxial accelerometer and with a triaxial velocimeter both mounted on a concrete slab.
Both sensors are digitized with high dynamics, high accuracy ADC.
ATLAS-F can be equipped with auxiliary analog inputs in order to monitor enviromental data (temperature or humidity) or with digital input to monitor external events (vault open/closed) or even with output driving capability to comunicate exceeding thresholds (alarms).
Models
ATLAS-F models available
- ATLAS-F 3T: 3 24bit channels on a single MIL connector (size 14, 19 pins) sample rate up to 1Khz.
- ATLAS-F 6T: 6 24bit channels on two MIL connectors (size 14, 19 pins) sample rate up to 500Hz.
- ATLAS-F 9T: 9 24bit channels on three MIL connectors (size 14, 19 pins) sample rate up to 250Hz.
FAQS
FREQUENTLY ASKED QUESTIONS
IS ATLAS CAPABLE OF PERFORMING BOTH REAL-TIME STREAMING AND EVENT-TRIGGERING SIMULTANEOUSLY?
Answer: Yes, ATLAS may do both tasks in parallel. For event-triggering, threshold exceedance instead of STA/LTA is recommended for accelerometers.
WHAT HAPPENS WHEN THE TELEMETRY IS DOWN? CAN THE DATA BE RETRIEVED EASILY?
Answer: The telemetry works through SeedLINK protocol, which holds data in its ring buffer whose size is by default 1GB (expandable): it corresponds to some days of continuous recording. When the telemetry goes down, the client may request data from the last packet received before the break and then recovered all the missing data. This is automatically handled by the SeedLINK client. Whether the telemetry is up or down, the device always stores data in a separate folder and the telemetry (SeedLINK) server detects it, and copies data in its ring buffer, ready to be sent on request.
CAN MULTIPLE ATLAS DIGITIZERS AT DIFFERENT LOCATIONS BE TRIGGERED SIMULTANEOUSLY?
Answer: This could be done in two ways. For example, if the 2 or more ATLAS digitizers are in the same LAN segment, either ATLAS could reach the trigger status and trigger all the other units with a broadcast message. If they are installed in different LAN segments (for example there is a gateway in the middle), this won’t work and we should install an additional module on a Linux machine that catches the alarms from the devices and implements a trigger voting algorithm.
WHAT FORMAT DOES THE ATLAS DIGITIZER USE TO SAVE EVENT FILES?
Answer: MiniSEED, just like the continuous recording. But if we install the QUAKELOGIC Event Watchdog software to the remote server, the trigger files may be sent automatically to a remote server and exported in ASCII format, or the server may extract the event data from the continuous recording and perform the export. For example, this would be the best way to interact with a LABVIEW application.
HOW DOES ATLAS DIGITIZER SEND AN EVENT FILE TO A REMOTE SERVER?
Answer: The ATLAS digitizer can communicate with the remote server (Linux Machine) through MQTT and SeedLINK. The Linux Machine takes care of storing all the continuous recordings from the ATLAS devices and receives the trigger data through MQTT or just extracts it from the continuous buffer. At this point, data is still available in MiniSEED. Once we have a time window for an event, we may export it in ASCII.
HOW CAN ATLAS DIGITIZER BE POWERED BY A SOLAR POWER?
Answer: The ATLAS digitizer can be powered by a 12 V solar panel (>100 W). The system requires a solar panel, 12V backup battery and controller unit. QuakeLogic can provide all these auxiliary hardware including on-site installation.
Datasheet
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