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SG-Link® OEM Wireless Strain Node
Direct strain gauge input datalogging transceiver for use in high speed wireless
sensor networks.
Features and Benefits
- 2.4 GHz direct sequence spread spectrum radio is license free worldwide
- IEEE 802.15.4 open communication architecture
- Supports simultaneous streaming from multiple nodes to PC
- Datalogging rates up to 2048 Hz
- Real-time streaming rates up to 4 KHz
- On-board memory stores up to 1,000,000 measurements
- Communication range up to 70m line-of-sight, 300m with high gain antennas
- Regulated 3 volt sensor excitation supports most analog sensors
- On-board bridge completion resistors
- Includes internal resistor for wireless shunt calibration
- Low power consumption for extended use
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Description
The SG-Link® OEM wireless module is designed to provide sensor manufacturers
with a low cost method of adding wireless capability to their product line.
With one differential channel, which includes full strain gauge conditioning and
programmable off set, and one single-ended channel, the SG-Link® OEM is compatible
with most types of analog sensors including strain gauges, displacement sensors,
load cells, torque transducers, pressure sensors, accelerometers, geophones, temperature
sensors, inclinometers, and others.
Fast and extremely versatile, the SG-Link® OEM is designed to operate as part
of a high speed wireless sensor network. Featuring 2 KHz sweep rates, combined with
2 Mbytes fl ash memory, these little nodes pack a lot of power in a small package.
With every node in the wireless network assigned a unique 16 bit address, a single
host transceiver can address thousands of multi-channel sensor clusters.
A scalable system architecture enables small and large networks of nodes to collect
data simultaneously using a broadcast trigger command to datalog to the nodes internal
memory, or transmit real-time data to a PC or gateway using parallel frequency streaming
(FDMA) or time-slotted communications (TDMA).
OEM manufacturers can develop their own applications with our Software Development
Kit, which includes fully-commented source code and a compiled executable for: Microsoft®
C++, NET 7.1, Microsoft® VB 6.0, Microsoft® VB.NET 2003, Microsoft®
VB.NET 2005 and LabVIEW® 7.1.
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Applications
Enables sensor manufacturers to develop wireless versions of their hardwired sensors.
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Input Channels |
1 full differential input channel, 350Ω resistance or higher (with optional
bridge completion), 1 single ended input (0 - 3 volts maximum), and internal temperature
sensor |
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Temperature Sensor |
-25˚C to 70˚C range, typical accuracy ±0.5˚C (at 25˚C) |
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Measurement Accuracy |
± 0.1% typical |
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Resolution |
± 1 bit 0.0024%
± 1 microstrain typical for 3 wire quarter bridge strain gauge |
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DC Bridge Excitation |
+3 volts DC at 50 mA maximum (pulsed to sensors for samples rates of 100 Hz and
below to conserve power) |
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Programmable Gain |
Software programmable: 20 to 2560 |
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Programmable Offset |
Software programmable |
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Analog to Digital (A/D) Converter |
Successive approximation type, 12 bit resolution
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Data Storage Capacity |
2 megabytes (approximately 1,000,000 data points) |
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Data Logging Mode |
Log up to 1,000,000 data points (from 100 to 65,500 samples or continuous) at 32
Hz to 2048 Hz |
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Sensor event driven trigger |
Commence datalogging when threshold exceeded |
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Real-time streaming mode |
Transmit real time data from node to PC - rate depends on number of active channels:
1 channel - 4 KHz, 2 channels - 2 KHz, 3 channels - 1.33 KHz |
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Low duty-cycle mode |
Supports multiple nodes on single RF channel, total update bandwidth of 500 Hz divided
by number of nodes |
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Synchronization between nodes |
Datalogging 100 µsec ± 50 ppm. LDC mode time stamped at PC |
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Sample rate stability |
Datalogging and LDC (mode(2Hz to 500Hz) 100 µsec ± 25 ppm (90 msec/hour)
LDC mode (1 Hz to 2 samples per hour) ± 10% |
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Wireless shunt calibration |
Channel 1. Internal shunt calibration resistor 499 KΩ |
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Radio Frequency (RF) Transceiver Carrier |
2.4 GHz direct sequence spread spectrum, license free worldwide (2.450 to 2.490
GHz) - 16 channels |
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RF Data Packet Standard |
IEEE 802.15.4, open communication architecture |
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RF Programming & Downloading |
8 minutes to download full memory |
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Range for Bi-directional RF Link |
70 m line-of-sight, up to 300 m with optional high gain antenna |
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Battery |
Customer supplied from 3.2 to 9 volts |
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Power Consumption |
node only: real-time streaming - 25 mA, datalogging - 25 mA, sleeping -
0.5 mA External sensors: 350 Ω strain gauge - 8 mA, 1000 Ω strain gauge
- 3 mA (add sensor consumption to above to calculate total power consumption) |
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Operating Temperature |
-40 to +85˚C |
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Dimensions/Weight |
Standard confi gurations: Potted - 31 mm x 31 mm x 7.8 mm - weight 10 grams Unpotted
- 31 mm x 31 mm x 5 mm - weight 4.3 grams Unpotted - 31 mm x 21 mm x 5 mm - weight
3 grams Custom confi gurations available on request, for example: Unpotted - 25.4
mm diameter x 6.3 mm - weight 3.1 grams |
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Software |
Agile-Link Windows XP® compatible |
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PC Comm |
Serial port, 115.2 kBaud |
*For dimensioned print go to www.microstrain.com
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General Documentation
Mechanical Prints
Technical Notes
FAQ's
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SG-Link® Starter Kits
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SG-Link 1 input channel, USB base station starter kit
OEM-SG-LINK-1CH-2400-SK2
Includes
(2) SG-Link-1CH-2400-M, (1) USB base station, (1) USB cable, (1) SG-Link power supply, (3) antennae, Windows XP compatible software
Part Number: 6308-1042
Online price: $2095.00
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MicroStrain has identified your location as
United States. If this is incorrect please contact
sales at 802-862-6629 or sales@microstrain.com
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OEM-SG-Link 1 input channel, Analog output base station starter kit
OEM-SG-LINK-1CH-2400-SKA
Includes
(1) OEM-SG-Link-1CH-2400-M, (1) Analog output base station, (1) SG-Link power supply, (1) Analog base station power supply, (2) antennae, Windows XP compatible software
Part Number: 6308-1011
Online price: $2145.00
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MicroStrain has identified your location as
United States. If this is incorrect please contact
sales at 802-862-6629 or sales@microstrain.com
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