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LORD QUICK START GUIDE

SHM-Link-201

Ruggedized Wireless Structural Health Monitoring Node

NODEOVERVIEW

The SHM- Link- 201 structural health monitoring node is used for in- situ,

multidimensional measurement and analysis of component strain and fatigue.

The SHM-Link-201 has three input channels and is designed to integrate with

field-installed strain gauge rosettes.

The SHM-Link-201 embedded processing algorithms provide sophisticated data

outputs, including damage estimations using user- configurable strain number

curves, estimations along various user-configurable angles, and an ASTM e1049

rainflow- counting histogram output. Sampling modes include continuous and

activity-sense. The SHM-Link-201 is designed for extended use with a lithium

battery.

To acquire sensor data, the SHM-Link-201 is used with any LORD Sensing data

gateway, such as the WSDA

-Base -10

-LXRS

, or the network-ready WSDA

1500 - LXRS

. The SensorConnect software interface is used for node

configuration, and SensorCloud™ is available for advanced data visualization,

aggregation, and analysis. Users can also build custom software interfaces with

the MicroStrain Communications Library (MSCL).

Figure 1 - Wireless Sensor Node

Figure 2 - Node Components

Item Description Quantity

A SHM-Link-201node assembly 1

B Battery compartment cap 1

C Battery compartment o-ring 1

D Battery tray 1

E Strain gauge bonding cable 1

F Dielectric grease (not shown) 1

Table 1 - Component List

Wireless Simplicity, Hardwired Reliability™

Summary of content (11 pages)

PAGE 1
LORD QUICK START GUIDE SHM-Link-201 Ruggedized Wireless Structural Health Monitoring Node NODE OVERVIEW The SHM- Link- 201 structural health monitoring node is used for in- situ, multidimensional measurement and analysis of component strain and fatigue. The SHM-Link-201 has three input channels and is designed to integrate with field-installed strain gauge rosettes.
PAGE 2
Wireless Sensor Node Quick Start Guide The SHM- Link- 201 interfaces includes a battery compartment and accommodations for strain gauges and node installation. A device status indicator is visible through a light-pipe below the product label.
PAGE 3
Wireless Sensor Node Quick Start Guide 1. Remove the SHM-Link-201 battery compartment cap. 2. Position a pliers or a hook-ended tool behind the battery tray screw-head. Pull firmly outward, or leverage the edge of the housing, to release the tray from the terminals inside. It should unseat and slide out. Figure 3 - Battery Compartment Assembly 3. Apply dielectric grease to the battery tray terminals. 4. Install the battery. Test Fit Node and Gauge Assembly 7.
PAGE 4
Wireless Sensor Node Quick Start Guide 9. Wire the strain gauges to the bonding cable so that the strain gauge assembly will be positioned in the central cutout . 10. Bond the cable and strain gauges onto the surface of the component to be monitored with strain gauge adhesive or equivalent. Install the gauges in the desired orientation for measurement and in accordance with the strain gauge manufacturers installation instructions. 13.
PAGE 5
Wireless Sensor Node Quick Start Guide Make System Connections To acquire sensor data, the SHM-Link-201 is used with a LORD Sensing data gateway such as the WSDA ®-200-USB or WSDA ® -1500 - LXRS ®. Connect the gateway to the computer or network and to a power source as required. Refer to the gateway user manual for more information.
PAGE 6
Wireless Sensor Node Quick Start Guide Synchronized Sampling Use the Base Station menu to start sampling for multiple nodes in Synchronized Sampling mode. For single nodes, or non- synchronized sampling, the node menu can be used. Figure 10 - SensorConnect Home Page Figure 9 - Base Station Menu SensorConnect automatically detects any LORD Sensing device plugged into an active port. Device connections are managed on the Devices page.
PAGE 7
Wireless Sensor Node Quick Start Guide Devices list - Found devices appear in the device list. This list also includes previously found devices even when the software is restarted. Selected device and device menu - Each type of device has its own menu. Once selected, the device name is highlighted, and the corresponding menu displayed. Menu options vary between devices but typically include device configuration, start sampling, sensor mode selections, and data downloading.
PAGE 8
Wireless Sensor Node Quick Start Guide Create Data Views IMPORTANT: Auto- calibration must be performed anytime sampling settings are changed. Start Sampling Data sampling is initiated for each device through its device menu. For a wireless sensor network, sampling can also be started for the entire network by initiating sampling from the network gateway menu. The sampling menu options vary depending on the type of device.
PAGE 9
Wireless Sensor Node Quick Start Guide The widget configuration menu is different for each type of widget but typically includes sensor or channel selections and widget settings such as titles and legends. The SensorCloud interface has six main views . When logging in as a registered user, the Device view is the default. Navigate to other views by clicking the view name at the top of the page. The Data and Settings views are only available once a device is selected from the device list.
PAGE 10
Wireless Sensor Node Quick Start Guide Figure 19 - MathEngine® View Figure 20 - FFT Graph in SensorCloud™ For more information about SensorCloud features and navigation, refer to the SensorCloud website or contact LORD Sensing Technical Support. http://sensorcloud.
PAGE 11
Wireless Sensor Node Quick Start Guide Radio Specifications The SHM-Link-201 employs a 2.4GHz IEEE 802.15.4-compliant radio transceiver for wireless communication. The radio is a direct- sequence spread spectrum radio and can be configured to operate on 16 separate frequencies ranging from 2.405 GHz to 2.480 GHz. Following the 802.15.4 standard, these frequencies are aliased as channels 11 through 26. For all newly manufactured nodes, the default setting is 2.425 GHz (channel 15).