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V-Link® Wireless Voltage Node
Analog 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
- Datalogging rates up to 2048 Hz, storing up to 1,000,000 measurements
- Real-time streaming rates up to 4 KHz
- Communication range up to 70 m line-of-sight, 300 m 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
- Internal rechargeable battery
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Introduction
Fast, compact, and extremely versatile, V-Link® wireless voltage nodes are
designed to operate as part of a high speed wireless sensor network.
Featuring 2 KHz sweep rates, combined with 2 Mbytes flash 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.
On-board sensor excitation, bridge completion, programmable gains & offsets,
and differential & single ended inputs provide an extremely versatile sensor
interface.
The bi-directional RF communications link can trigger a sample to be logged
from 70 meters, or request real-time data to be transmitted to the host PC for
data acquisition/analysis. The frequency agile system enables simultaneous
real-time streaming from up to 16 nodes in the 2.4 GHz range.
The scaleable system architecture and programmable sensor interface enables a
new generation of wireless sensor networks. The V-Link® is compatible with a
wide range of analog sensors, including strain gauges, displacement sensors,
load cells, torque transducers, pressure sensors, accelerometers, geophones,
temperature sensors, inclinometers, and others.
A Software Development Kit is available, which includes fully-commented source
code and a compiled executable for Microsoft® Visual Studio 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
Condition-based monitoring of machines
Health monitoring of civil structures and vehicles
Smart structures and materials
Experimental test and measurement
Robotics and machine automation
Vibration and acoustic noise testing
Sports performance and sports medicine analysis
Distributed security networks
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Input Channels |
Up to 8 input channels: 4 full differential, 350 Ω resistance or higher
(with optional bridge completion), 3 single ended inputs (0-3 volts maximum),
and internal temperature sensor |
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Temperature Sensor |
-40˚C to +70˚C range, accuracy ±2˚C (at 25˚C) |
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Anti-aliasing Filter Bandwidth |
-3 dB cutoff at 250 Hz (factory adjustable) |
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Measurement Accuracy |
±0.1% full scale typical |
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Resolution |
1 bit: 0.024%
1 microstrain typical for 3 wire full bridge strain gauge (when used in accordance with MicroStrain® recommendations) |
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DC Bridge Excitation |
+3 volts DC at 50 mA maximum (pulsed to sensors for sample rates of 100 Hz and
below to conserve power)
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Programmable Gain |
Software programmable for differential input channels from 210 to 4844 (can be
reduced with hardware resistor change) |
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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 million data points at sampling rates from 32Hz to 2048Hz per channel in fixed (from 100 to 65,500 samples) or continuous (until memory full) sessions |
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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, 4
channels - 1 KHz, 5 channels - 800 Hz, 6 channels - 666 Hz, 7 channels - 570
Hz, 8 channels - 500 Hz |
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Low Duty-cycle Mode |
Supports multiple nodes on single RF channel |
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Synchronization Between Nodes |
Datalogging ±4 µsec ±50 ppm, LDC mode time stamped at PC |
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Sample Rate Stability |
±25 ppm for sample rates > 1 Hz, ±10% for sample rates < 1 Hz |
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Wireless Shunt Calibration |
Channels 1 to 4, 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 (2.405 to
2.480 GHz) - 16 channels, radiated power 0 dBm (1mW) |
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RF Data Packet Standard |
IEEE 802.15.4, open communication architecture |
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RF Data 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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Internal Li-Ion Battery |
3.7 volt lithium ion rechargeable battery, 740 mAh capacity
Customer may supply external power from 3.2 to 9 volts |
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Power Consumption |
V-Link® 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 |
-20˚C to +60˚C with standard internal battery and enclosure, extended
temperature range optional with custom battery and enclosure. -40˚C to +85˚C
for electronics only |
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Maximum Acceleration Limit |
500 g standard (high g option available) |
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Dimensions |
88 mm x 72 mm x 26 mm (enclosure without antenna)
72 mm x 65 mm x 12 mm(circuit board assembly only)
For dimensioned print go to Documentation tab |
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Weight |
97 grams (with enclosure) |
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Enclosure Material |
ABS plastic |
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Software |
Node Commander® Windows XP/Vista compatible
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Compatible Base Stations |
USB, RS-232, Analog, WSDA® |
Patents Pending
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General Documentation
Mechanical Prints
Technical Notes
FAQ's
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V-Link® Starter Kits
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V-Link Wireless Voltage Starter Kit
V-LINK-2400-SK2
Includes
(2) V-Link-2400-M, (1) USB base station, (1) USB cable, (1) power supply, (3) antennae, Windows XP compatible software
Part Number: 6312-0042
Online price: $2595.00
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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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V-Link Wireless Voltage Starter Kit
V-LINK-2400-SKA
Includes
(1) V-Link-2400-M, (1) Analog output base station, (1)power supply, (1) Analog base station power supply, (2) antennae, Windows XP compatible software
Part Number: 6312-0011
Online price: $2395.00
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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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