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LORD Sensing USER MANUAL

Torque-Link-LXRS

Wireless Torque Sensor

Содержание Torque-Link-LXRS

Страница 1: ...LORD Sensing USER MANUAL Torque Link LXRS Wireless Torque Sensor ...

Страница 2: ...liston VT 05495 United States of America Phone 802 862 6629 Fax 802 863 4093 9 00 AM to 5 00 PM Eastern Time US Canada http www microstrain com sensing_support LORD com sensing_sales LORD com Document 8500 0059 Revision E Subject to change without notice ...

Страница 3: ...n 13 3 2 System Connections 13 3 3 Gateway USB Communication 14 3 4 Connect to Nodes 14 3 4 1 Adding a Node by Address 15 3 4 2 Using Node Discovery 15 3 5 Channel Configuration 15 3 6 Sensor Calibration 17 3 7 Sampling Settings 17 3 8 Data Acquisition 18 3 8 1 Connect to SensorCloud 22 3 8 2 Navigating Menus 22 3 8 3 Sensor Data Files 25 4 Installing Strain Gauges 27 4 1 Node Differential Inputs ...

Страница 4: ...mula 45 7 1 Maintenance 47 7 2 Changing the Batteries 48 8 Troubleshooting 49 8 1 Troubleshooting Guide 49 8 2 Device Status Indicators 53 8 3 Optimizing the Radio Link 54 8 3 1 Range Test 54 8 4 Battery Connector 55 8 5 Updating Node Firmware 57 8 6 Repair and Calibration 59 9 Parts and Configurations 61 9 1 Standard Configurations 61 9 2 Replaceable Parts 62 9 3 Recommended Strain Gauges 62 9 4 ...

Страница 5: ...10 3 Torque Link RPM Limits 66 10 4 Power Profile 67 10 5 Radio Specifications 68 10 6 Frequency Setting 69 11 Safety Information 70 11 1 Battery Hazards 70 11 2 Disposal and Recycling 70 12 References 72 12 1 Related Documents 72 ...

Страница 6: ...ny types of sensors including accelerometers strain gauges pressure transducers load cells torque and vibration sensors magnetometers 4 to 20 mA sensors thermocouples RTD sensors soil moisture and humidity sensors inclinometers and orientation and displacement sensors Some nodes come with integrated sensing devices such as accelerometers System sampling capabilities include lossless synchronized s...

Страница 7: ...re and post event buffers To acquire sensor data the Torque Link LXRS is used with any LORD Sensing LXRS data gateway such as the WSDA 101 and WSDA 1500 and either the Node Commander or SensorCloud software interfaces The Node Commander software is included with the gateways and allows configuration of the node Figure 1 LXRS 2 1 Component List The Torque Link LXRS comes with the components shown i...

Страница 8: ...tments for the node electronics and battery pack and cutouts for a strain gauge and wiring The electronics compartment is potted at the factory to make it suitable for harsh environments The other half simply has the cutouts for the strain gauge and wiring In the optional two channel version of the Torque Link LXRS both haves have an electronics and battery compartment For more information see Par...

Страница 9: ... 2 Interface and Indicators Indicator Behavior Node Status Device status indicator OFF Node is OFF Rapid flashing on start up Node is booting up 1 slow pulse per second Node is idle and waiting for a command Table 1 Indicator Behaviors 9 ...

Страница 10: ...r driver Figure 3 Disassembly 2 4 Node Operational Modes Sensor nodes have three operational modes active sleep and idle When the node is sampling it is in active mode When sampling stops the node is switched into idle mode which is used for configuring node settings and allows toggling between sampling and sleeping modes The node will automatically go into the ultra low power sleep mode after a u...

Страница 11: ...nual Figure 4 Node Operational Modes NOTE The Torque Link LXRS is powered on whenever the battery is connected With no activity it goes into sleep mode and must be reactivated with an idle wake or stop command to resume use 11 ...

Страница 12: ...utput is connected to channel 3 of the Torque Link LXRS l Refer to the node specification table for the temperature sensor operating parameters see Operating Specifications on page 66 l The temperature sensor has a measurement range of 40 C to 85 C range with an accuracy of 2 C 25 C l The sensor is made by Texas Instruments part number LM60 Specifications may be found on the manufacturer s website...

Страница 13: ...Node Commander Software Suite on the host computer run the installer executable file and follow the on screen prompts The software is provided with all gateways and is also available on the LORD Sensing website see References on page 72 The suite includes the following programs l SensorConnect is used for configuring nodes and acquiring viewing and saving data l Live Connect is a TCP IP to serial ...

Страница 14: ...n 1 Power is applied to the gateway through the USB connection Verify the gateway status indicator is illuminated showing the gateway is connected and powered on 2 Open the Node Commander software 3 The gateway should appear in the Controller window automatically with a communication port assignment Figure 6 USB Gateway Communication If the gateway is not automatically discovered verify the port i...

Страница 15: ...node discovery For more information see Troubleshooting Guide on page 49 1 Turn the node power on Within a few seconds the node will transmit a message with its operating frequency 2 When the device status indicator on the node ends the rapid flash sequence and begins pulsing at one second intervals the node has completed the normal boot up sequence and is running in idle mode At this point the no...

Страница 16: ...Torque Link LXRS User Manual Figure 8 Node Channels Menu Figure 9 Channel Setup 16 ...

Страница 17: ...0 Sample Settings Menu In general when determining what sample mode and rate is most suitable for the application refer to the following guidelines l Use a sample rate at least twice the value of the target measurement frequency This is the minimum sample rate required to produce an accurate digital representation of the measured signal The higher the sample rate the more accurate the digital repr...

Страница 18: ...ing a Sampling Session When a synchronized sampling session is started the sampling menu appears and includes settings to enable optional sampling features configure nodes and to specify where the data will be saved The built in bandwidth calculator displays the total bandwidth used by the nodes selected for synchronized sampling Figure 12 Synchronized Sampling Menu a Save Location indicates where...

Страница 19: ...ransmission to initiate sampling When this option is selected default the gateway beacon is enabled and will begin transmitting at a fixed interval when sampling is started Disabling the beacon on start unchecking the box will set the nodes to wait for the beacon but it does not actually start the beacon when sampling is started This can be used if there is a need for sampling to be initiated late...

Страница 20: ...device name b Node information includes node serial number and sampling statistics Right click on the node name for more menu options such as Stop Nodes c Data is a display of the sampled data with each channel in its own column d Radio strength indicates the strength of the communication between the gateway and node See Range Test on page 54 e Data file is the location and size of the data file a...

Страница 21: ...Select the x axis width and y axis zoom percentage or use the Auto check box for automatic scaling c Graph The node graph shows the sampled data Each active channel is displayed in a different color The x axis is time in seconds and the y axis is the A D value bits Right click on the graph for additional menu options such as View Graph Key Pan Zoom Pause and Remove Graph d View menu Allows user to...

Страница 22: ...ty systems Basic SensorCloud services are available to all users free of charge at http www sensorcloud com Figure 15 SensorCloud Log in or Register 3 8 1 Connect to SensorCloud Go to the SensorCloud website and select sign in to enter the log in credentials or register as a new user if needed http www sensorcloud com Figure 16 SensorCloud Log in or Register 3 8 2 Navigating Menus The SensorCloud ...

Страница 23: ...ploader The data upload feature enables data from any source such as non Ethernet LORD Sensing gateways or third party sensor to be uploaded to the SensorCloud platform The data must be in the LORD Sensing CSV format Data This view is only available after a device is selected It displays data that is collected from sensor nodes or uploaded from files Data selections are listed by node channel or a...

Страница 24: ...Torque Link LXRS User Manual Figure 18 SensorCloud Data View Figure 19 MathEngine View 24 ...

Страница 25: ...rCloud using the CSV Uploader The data files can be found on the host computer in the default directory or the location specified The files are organized in separate folders by mode and then further categorized by date session and or node serial number The default directory is C ProgramData Microstrain NodeCommander Data Synchronized sampling and low duty cycle files are found in the Sampled Data ...

Страница 26: ...Torque Link LXRS User Manual Figure 21 Exploring Data NOTE The Microsoft Excel the Time data column in the data file may have to be changed to m d yyyy h mm ss 000 format to make it more readable 26 ...

Страница 27: ...ltage to the sensor and measure the resulting sensor signal output The sensor signal goes through a programmable gain amplifier PGA and is then processed in the node by a16 bit analog to digital A D converter over the 3 V dc range The resolution of the sensor measurement is dependent on the operating range of the sensor If the application is such that only a small portion of the 3V dc range is bei...

Страница 28: ...cing all four resistors is a full bridge configuration Figure 24 Full Bridge Wiring In all configurations strain gauges and the circuits they interface with are designed for use with specific circuit impedance values and must be selected accordingly Common values are 350 or 1000 ohms Figure 24 Full Bridge Wiring The physical placement and orientation of the gauge elements on the object being measu...

Страница 29: ...sistance when compared to the half bridge configuration whch results in higher accuracy For these reason full bridge configurations are recommended for measuring torque or axial strain with the Torque Link LXRS 4 3 Strain Gauge Installation This section describes the recommend strain gauge placement and bridge configuration for torque measurements with the Torque Link LXRS Wireless Torque Sensor N...

Страница 30: ...t the primary considerations are the orientation of the gauges and the position of the gauges relative to the Torque Link LXRS assembly and the cutouts for the gauges and wiring For torque measurement the phenomenon being measured is shearing of the shaft surface To measure this shear the gauges should be installed at a 45 angle from the shaft center line Figure 26 Placement for Full Bridge Torque...

Страница 31: ...e 27 Strain Gauge Placement Gauges terminals and wiring are installed so that they are completely contained within the cutouts when the Torque Link LXRS is installed Check fit the assembly over the gauges during the gauge installation process to ensure proper clearance see Torque Link LXRS Installation on page 34 The connectors between the strain gauges and node electronics will be tucked into the...

Страница 32: ...o the wiring terminal The connector is included with the node or can be ordered separately see Parts and Configurations on page 61 The wires are soldered on to the strain gauge terminals in accordance with the strain gauge manufacturers signal designations For the connector wiring refer to Table 2 Strain Gauge Wiring It is best practice to keep the wires as short as possible and the same length as...

Страница 33: ...Wiring is shown for dual element full bridge configuration see Wheatstone Bridge Tutorial on page 27 Connector pin Signal Wire color Strain element 3 V red R1 R4 5 S yellow element 2 center 6 S green element 1 center 1 GND black R2 R3 Table 2 Strain Gauge Wiring 33 ...

Страница 34: ...ar over the shaft carefully aligning the gauge cutout see Interface and Indicators on page 8 over the gauge element and wiring channels over the terminal strip and wiring Connect the strain gauge connector to the electronic compartment connector and tuck them into the strain gauge pocket Train the wiring into the wiring channel 4 Press the first half of the collar on the shaft to temporarily stick...

Страница 35: ...ld be a small gap equal on both sides between the collar halves Figure 28 Assembly Installation 5 2 Re Using the Assembly The Torque Link LXRS assembly can be re used on other shaft assemblies as long as the shaft is the same size Use new collar placement tape for the new installation see Parts and Configurations on page 61 New installations or new strain gauges will need to be re calibrated after...

Страница 36: ...strain is not exactly linear but may be accurate enough for many applications If more precision is desired the calibration slope and offset calculation can be done using strain and then converted from strain to torque using the theoretical torque formula 1 Open Node Commander and establish communication with the gateway and node See System Operation on page 13 2 Right click on the node name and se...

Страница 37: ...Torque Link LXRS User Manual 5 Select the Auto Balance button to tare the no load value of the strain gauge Observe the value returned for the Auto Balance value Figure 30 Channel Settings 37 ...

Страница 38: ...g the internal shunt resistor Figure 31 Strain Wizard Settings 11 Select Calibrate 12 Verify the calibration looks as shown in Figure 32 Strain Gauge Calibration The green line represents the output of the strain gauge With no load applied it should sit near the Auto Balance baseline value represented by the red dashed line During calibration a shunt resistance selected on the Parameters page is a...

Страница 39: ...Link LXRS User Manual Figure 32 Strain Gauge Calibration 13 Select Finish to end the Strain Wizard Note that the slope and offset values have been calculated automatically Figure 33 Completed Strain Wizard 39 ...

Страница 40: ...ibration 1 Open Node Commander and establish communication with the gateway and node see System Operation on page 13 2 Right click on the node heading and select Configure Configure Node Select the check box for Channel 1 which is where the strain gauge is connected and then select the Configure button Figure 35 Node Configuration Menu 3 Use the following settings Figure 36 Channel Settings a Conv...

Страница 41: ...l 7 Use a calibrated torque wrench or some other way of applying and measuring a known load to the shaft and apply loads at a number of intervals over the expected range of use At each of the calibration intervals record the applied force and the corresponding sweep value on the y axis of the graph the A D value output of the sensor a Zoom in and out on the graph by un checking the Auto Y Axis Zoo...

Страница 42: ...Torque Link LXRS User Manual Figure 38 Node Sampling 42 ...

Страница 43: ...o load on the sensor 12 Observe the value in the stream graph If the stream is not at zero return to the channel configuration menu and adjust the offset by increasing or decreasing the value 13 Once the offset has been zeroed verify the calibration by applying known loads on the shaft throughout the load range observing and verifying the measurement in engineering units 6 2 Calculating a Linear S...

Страница 44: ...e left column x axis value and the applied load in the right y axis value 3 From the Insert menu select Chart Scatter Select the preferred format Figure 40 Generate a Scatter Chart 4 Right click on the graphed line and select Add Trendline 5 Designate the line as Linear and check the option to Display the Equation on the chart Figure 41 Plot Trendline 44 ...

Страница 45: ...r the slope and offset as the conversion values for the sensor channel under the applicable engineering units In this example enter 0 1338 for the slope and 282 36 for the offset for the units conversion values on the measured channel Figure 42 Slope and Offset Values 6 3 Theoretical Torque Formula The theoretical torque formula can be used to convert strain measurements to torque units Accuracy i...

Страница 46: ...Torque Link LXRS User Manual Figure 43 Theoretical Torque Formula 46 ...

Страница 47: ...only user serviceable part in the Torque Link LXRS For instructions on how to change the battery see Changing the Batteries on page 48 To order replacement parts see Parts and Configurations on page 61 For other service or repair needs contact LORD Sensing Technical Support see Technical Support on page 59 47 ...

Страница 48: ...ure 44 Battery Installation 2 Disconnect the battery connecter inside the compartment and remove the battery 3 Install the new battery in its place orienting it so the connectors align and the battery matches the contour of the compartment 4 Reinstall the battery compartment cover ensuring no wires are pinched and the o ring seal under the compartment cover is intact Figure 44 Battery Installation...

Страница 49: ...Torque Link LXRS User Manual 8 Troubleshooting 8 1 Troubleshooting Guide 49 ...

Страница 50: ...pport See Technical Support on page 59 2 COMMUNICATION no communication to the gateway or node 2 1 node or gateway has no power Verify the node and gateway have power applied and that applicable power switches are on Power is indicated on both devices by a status indicator LED 2 2 gateway has no communication with the computer Verify gateway communication in the software Check remove and reconnect...

Страница 51: ...idle state allowing configuration to occur 2 8 gateway or node is damaged Verify all connections power and settings If available try installing alternate nodes and gateways one at a time to see if the faulty device can be identified If no conclusion can be determined or to send a device in for repair contact LORD Sensing Technical Support See Technical Support on page 59 3 DATA ACQUISITION sensor ...

Страница 52: ...n connections contact LORD Sensing Technical Support See Technical Support on page 59 3 5 sensor channel not configured correctly Verify that the sensor is configured on the correct channel and has been enabled for data acquisition 3 6 sensor calibration is invalid 52 ...

Страница 53: ...s initially applied Node is booting normally and sending out a status message 1 second pulse green Node is idle Continuously ON green Node is datalogging 1 Hz pulse green Node is sampling in low duty cycle or synchronized sampling mode ON bright green Node is in synchronized sampling mode and is re syncing or taking a burst sample Pulses for each ping Node is sending out communication requests suc...

Страница 54: ...e Radio Frequency Interference RFI from other wireless devices especially those operating in the same frequency range This includes other nodes and 2 4 GHz WIFI routers If other wireless devices are required nearby mount them at different heights to minimize interference Additionally a different radio frequency may be selected using SensorConnect software l Minimize Electromagnetic Interference EM...

Страница 55: ...5 dBm and 0 dBm The devices is still able to communicate between 90 dBm and 75 dBm but it could be intermittent or result in data loss Position the node and gateway antennas where the best RSSI value is observed Figure 46 Range Test Statistics 8 4 Battery Connector The batteries come with the connecter installed but if voltage measurement is needed for troubleshooting or otherwise refer to Table 4...

Страница 56: ...Torque Link LXRS User Manual Battery terminal Signal Wire color Connector pin Battery V red 3 Battery GND black 1 Table 4 Battery Wiring 56 ...

Страница 57: ...ost current version Updates are found on the LORD Sensing website See Technical Support on page 59 for contact and website information 1 Download the LXRS Firmware Upgrade file from the LORD Sensing website 2 Once downloaded extract the contents of the zip file into a folder on the computer Verify there is a file with a zhex extension 3 Launch Node Commander and establish communication between the...

Страница 58: ...e Firmware and the Node Firmware Upgrade window will appear 7 Click Browse and navigate to the downloaded zhex file 8 Click Write and the upgrade sequence will begin When completed Upgrade Success will appear in the Status column Figure 48 Upgrade Firmware Window 58 ...

Страница 59: ...l date of purchase LORD Sensing will repair or replace at its discretion a defective product if returned to LORD Sensing within the warranty period This warranty does not extend to any LORD Sensing products which have been subject to misuse alteration neglect accident incorrect wiring mis programming or use in violation of operating instructions furnished by us It also does not extend to any units...

Страница 60: ..._support LORD com Phone 802 862 6629 Fax 802 863 4093 9 00 AM to 5 00 PM Eastern Time US Canada SKYPE microstrain wireless support Live Chat is available from the website during business hours 9 00 AM to 5 00 PM Eastern Time US Canada 60 ...

Страница 61: ...The Torque Link LXRS is available in standard sizes based on the shaft size it will be installed on It is also available with one or two channels for attaching strain gauges For example part numbers seeTable 5 Example Torque Link LXRS Part Numbers Figure 49 Part Number Designations 61 ...

Страница 62: ...37 9117 0028 Collar placement tape 3M VHB 9203 0008 9 3 Recommended Strain Gauges Description Manufacturer and Part Number Dual element shear torque pattern strain gauge Vishay 062UV series Strain gauge terminal strip for wiring Vishay MM Bondable 9 4 Wireless System Equipment Model Description LORD Sensing Part Number WSDA 1500 SK Ethernet Data Gateway Starter Kit 6314 1501 Node Commander Softwar...

Страница 63: ...g Sensor Input Node various models V Link LXRS Wireless 7 Channel Analog Input Sensor Node various models TC Link LXRS Wireless Thermocouple Node various models DVRT Link LXRS Wireless Displacement Sensor Node various models ENV Link Pro Wireless Environmental Sensor Node various models Watt Link LXRS Wireless Energy Monitoring Sensor Node various models RTD Link LXRS Wireless RTD Sensor Node vari...

Страница 64: ...gating to the product page and using the Buy feature http www microstrain com wireless For further assistance our sales team is available to help with product selection ordering options and questions Sales Support sensing_sales LORD com Phone 802 862 6629 Fax 802 863 4093 9 00 AM to 5 00 PM Eastern Time US Canada 64 ...

Страница 65: ...tions 10 1 Physical Specifications The Torque Link LXRS is available in many sizes to fit a variety of standard shaft diameters see Parts and Configurations on page 61 All variations are the same height Figure 50 Torque Link LXRS Dimensions 65 ...

Страница 66: ... 2 475 GHz with14 channels RF communication protocol IEEE 802 15 4 Power source Replaceable non rechargeable battery pack 3 0 V dc 1 2 Ah Li MnO2 batteries in series configuration Power consumption 1 to 25 mA configuration dependent see user manual Operating temperature 20 C to 80 C Angular acceleration limit 500 g standard high g option available Maximum RPM 2500 to 4200 RPM diameter dependent se...

Страница 67: ...Node power use is highly dependent on the operational parameters such as sample mode and rate More active channels and higher sample rates equate to increased power use Below is an example approximation of the power profile of a Torque Link LXRS over a range of sample rates operating in Synchronized Sampling mode 67 ...

Страница 68: ...wing 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 FCC ID XJQMSLINK000 IC ID 8505A MSLINK000 Torque Link LXRS This device complies with Part 15 of the United States FCC Rules and Industry Canada s license exempt RSSs Operation is subject to the following two conditions 1 This device may not...

Страница 69: ... nodes operating on different frequencies by using the Node Discovery feature in SensorConnect In this routine the gateway listens for node broadcasts on the frequency channel to which it is set If the node is in normal boot up mode it will provide the broadcast when it is initially powered on and it will broadcast on all channels As long as the node is powered on after activating the Node Discove...

Страница 70: ...mpt to recharge the batteries Do not expose the batteries to water When replacing batteries use only the batteries specified for the node see Parts and Configurations on page 61 Follow the battery installation instructions observing polarity and battery orientation and taking care not to short circuit the battery terminals see Changing the Batteries on page 48 Li MnO 2 batteries contain toxic chem...

Страница 71: ...oxic chemicals and heavy metals that are harmful to humans health and the environment Disposal is subject to federal and local laws Do not discard the device or batteries in the trash Follow proper electronic and battery waste disposal protocol as dictated by federal and local authorities Some states have programs for extracting reusable parts for recycling 71 ...

Страница 72: ...upport documentation Product Application Notes http www microstrain com applications NIST Calibration Procedures http www nist gov calibrations ASTM Testing Procedures http www astm org Standard standards and publications html ASTM Strain Gauge Installation Guide ASTM E1237 93 http www astm org Standards E1237 htm Table 7 Related Documents These terms are in common use throughout the manual A D Va...

Страница 73: ...Configuration Protocol is the standardized networking protocol used on Internet Protocol IP networks which automatically configures devices that are attached to it by assigning and configuring the device IP address EMI Electromagnetic Interference is an inductive or radiated disturbance that can create signal degradation on electrical signals including loss of data ESD Electrostatic Discharge is t...

Страница 74: ...coordinate m is the slope and b is the offset Oversampling In signal processing oversampling is a technique used to achieve increased signal resolution and better noise immunity by recording readings at a higher frequency than the output of the device being measured In analog to digital conversion the higher the oversampling rate the better the recreated analog signal Packet unit of sampled data P...

Страница 75: ... sampling mode in which all active channels and the sensors attached to them are measured and the acquired data is transmitted to the gateway and software The data is not written to non volatile memory during streaming Streaming can either be finite have a user defined start and end time or continuous continued until the power is cycled on the node Synchronized Sampling a sampling mode that automa...

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