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The SG-Link® -RGD -LXRS® ia a versatile, ruggedized four-channel analog sensor node with integrated triaxial accelerometer.

Product Highlights

  • Four analog input channels, integrated three-axis accelerometer, and an internal temperature sensor
  • Integrated strain sensor signal conditioning, embedded processing, and environmentally hardened form factor ideal for permanently mounting over strain gauges
  • Supports conventional bonded foil, piezoelectric-resistive, Wheatstone bridge, and modular Columbia Research
  • Labs-type strain gauges
  • Integrated triaxial accelerometer with MEMS technology and +/- 16 g range
  • User-programmable sample rates up to 4096 Hz
Datasheet Software
Where to Buy?
U.S. International OEM

Wireless Simplicity, Hardwired Reliability

High Performance

  • Node-to-node synchronization up to ±32 microseconds
  • High resolution data with 16-bit A/D converter
  • Scalable, long range wireless sensor networks up to 2 km

Ease of Use

  • Flex bonding cable and node form factor allow quick installation over existing strain gauges
  • Low profile, environmentally sealed enclosure
  • On-board shunt calibration

Cost Effective

  • Reduction of costs associated with wiring
  • Out-of-the box wireless sensing solution reduces development and deployment time.
General

Sensor input channels

Differential analog, 4 channels

Integrated sensors

Triaxial MEMS accelerometer, 3 channels

Internal temperature, 1 channel

Data storage capacity

2 M bytes (up to 1,000,000 data points, data type dependent)

Analog Input Channels

Measurement range

Differential: full-bridge, 350 Ω (factory configurable)

Accuracy and resolution

± 0.1% full scale typical, 16 bit resolution

Anti-aliasing filter bandwidth

Single-pole Butterworth

-3 dB cutoff @ 250 Hz

Bridge excitation voltage

+2.7 V dc, 50 mA total for all channels

(pulsed @ sample rates 16 Hz to conserve power)

Measurement gain and offset

User-selectable in software on differential channels gain values from 104 to 1800

Integrated Accelerometer Channels

Measurement range

± 16 g

Accuracy and resolution

± 4 mg, 13 bit resolution

Integrated Temperature Channel

Measurement range

-40 °C to 85 °C

Accuracy and resolution

± 2 °C (at 25 °C) typical, 16 bit resolution

Sampling

Sampling modes

Synchronized, low duty cycle, datalogging

Sampling rates

Continuous sampling: 1 sample/hour to 512 Hz

Periodic burst sampling: 32 Hz to 4096 Hz

Datalogging: 32 Hz to 4096 Hz

Sample rate stability

± 3 ppm

Network capacity

Up to 2000 nodes per RF channel (and per gateway) depending on the number of active channels and sampling settings. Refer to the system bandwidth calculator: http://www.microstrain.com/configure-your-system

Synchronization between nodes

± 32 μsec

Operating Parameters

Radio frequency (RF)

transceiver carrier

2.405 to 2.470 GHz direct sequence spread spectrum over 14 channels, license free worldwide, radiated power programmable from 0 dBm (1 mW) to 16 dBm (39 mW); low power option available for use outside the U.S.- limited to 10dBm (10mW)

Range for bi-directional RF link

70 m to 2 km line of sight with RF power setting

RF communication protocol

IEEE 802.15.4

Power source

Replaceable 3.7 V dc, 1.7 Ah Tadiran TL-5935 1/6 D-cell battery

Power consumption

960 uA ( 3.46 mW) @ 3.6 V dc, 32 HZ, 3 ch, no duty cycling

10.6 mA (38.16 mW) @ 3.6 V dc, 256 Hz, 3 ch, no duty cycling

4.0 mA (14.4 mW) @ 3.6 V dc, 256 Hz, 1 ch, no duty cycling

Operating temperature

-40 ˚C to + 85 ˚C

Acceleration limit

500 g standard (high g option available)

Physical Specifications

Dimensions

101 mm x 46 mm x 26 mm

Weight

150 g (including battery)

EMI/EMC rating

MIL-STD-461F

Enclosure material

Clear polycarbonate

Integration

Compatible gateways

All WSDA® base stations and gateways

Compatible sensors>

Bridge type analog sensors

Connectors

Flex cable terminal/solder pads (flex cable included)

Shunt calibration

Internal shunt calibration resistor 499 KΩ, differential channels<

Software<

SensorCloud™, SensorConnect™, Node Commander®, Windows 7 (or newer)

Software development

Open-source MicroStrain Communications Library (MSCL) with sample code available in C++,Python,and.NET formats (OS and computing platform independent): http://lord-microstrain.github.io/MSCL/

Regulatory compliance

FCC (U.S.), IC (Canada), ROHS

 

The WSDA-RGD (with internal GX3 inertial sensor) is configured to produce the following messages on startup.

GPS Data (1 Hz):

  • UTC Time
  • LLH Position
  • NED Velocity

AHRS Data (100 Hz):

  • Euler Angles

From this output the WSDA logs:

GPS (1 Hz):

  • latitude
  • longitude
  • height above ellipsoid
  • height above MSL
  • horizontal accuracy
  • vertical accuracy
  • speed

AHRS (100 Hz):

  • roll
  • pitch
  • yaw

The WSDA-RGD does not log any data until it gets a valid time, if it is set to get time from GPS only it will not log any output from the GX3 until the UTC timestamp from the GX3 is valid, even though the GX3 is producing valid AHRS data.

This data is not user configurable and is not available as a live stream through LiveConnect.

All LORD MicroStrain wireless sensor nodes, wireless base stations, and wireless sensor data aggregators are shipped from the factory with their radio frequency set to channel 15 (2.425 GHz).

This channel setting was established during 2012.

Previously all wireless products were set to channel 25 (2.475 GHz).

If you are mixing new nodes and base stations with older nodes and base stations, please be cognizant of these different channel settings.

The Node Discovery function of Node Commander will help you sort out which nodes are on what channels; Node Discovery is channel independent and allows the base station to communicate with any node, no matter what channel it is on

Sampling methods such as synchronized sampling, low duty cycle, network broadcast, etc. require that all nodes are on the same frequency so you will want to insure that you have adjusted the channels settings of the nodes to suit.

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If you would like to speak to someone directly call 802-862-6629.