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HBM MXFS, User Manual

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HBM MXFS User Manual Download Page 60

Operation

60

A05595_02_E00_00

  

HBM: public

MXFS

Strain with temperature compensation

Using a temperature sensor

When using a temperature channel to compensate for the effect of tempera­
ture on the strain measurement, it must be ensured that the changes in tem­
perature felt by the two sensors is the same. The selected channel for temper­
ature compensation with this method must be configured as a temperature
sensor.

Fig. 4.18

Strain with compensation using a temperature sensor

The gauge factor (k) of FBG strain gauges is given in their documentation.

The Temperature Cross Sensitivity (TCS) corresponds to the effect of temper­
ature on the strain sensor, meaning the induced strain to the sensor after
installation due to a change of 1°C on its temperature. It is a value given on the
sensor’s documentation.

Summary of Contents for MXFS

Page 1: ...User Manual English MXFS QuantumX BraggMETER Module...

Page 2: ...ss Rua Vasconcelos Costa 277 4470 640 Maia Portugal Tel 351 229 613 010 Fax 351 229 613 020 fibersensing hbkworld com www hbm com fs Mat DVS A05595_02_E00_00 HBM public 05 2021 E Hottinger Baldwin Mes...

Page 3: ...on 11 2 2 5 Marking of pollutant emission limit values for deliveries to China 11 3 Operation 12 3 1 Connectors 12 3 2 Setting up 13 3 2 1 Power supply 13 3 2 2 Connection to PC or data recorder 14 3...

Page 4: ...Broken connector 41 4 catman software 42 4 1 Starting a project with MXFS 42 4 1 1 Synchronization 43 4 2 Catman project for MXFS 44 4 2 1 Sample rates 46 4 2 1 1 Acquisition rate 46 4 2 1 2 Sampling...

Page 5: ...MXFS A05595_02_E00_00 HBM public 5 4 2 5 Zero balance 66 4 2 6 Reset reference wavelength 68 4 3 Reset the device 69...

Page 6: ...ost suited for monitoring projects or thermal testing of components S High speed mode with 2000 S s sweeping speed most suited for dynamic monitoring or experimental stress analysis Filtering and down...

Page 7: ...heme and setup To operate the module as stand alone you will need to additionally consider Material Numbers Quantity Description 1 KAB271 3 1 Power cord 1 NTX001 1 Power adapter 1 KAB239 2 1 Ethernet...

Page 8: ...together with MXFS without any extra cost S Drivers for LabView S Windows device driver for IEEE1394b FireWire 1 4 Synchronization MXFS follows the available synchronization methods of the QuantumX fa...

Page 9: ...or the environment and human health For more detailed information about disposal of your old appliance please con tact your city office waste disposal service or distributor that purchased the product...

Page 10: ...e or skin injury during normal operation It is safe under all conditions of normal use No safety requirements are needed to use Class 1 laser devices 2 2 3 General Precautions Considerations Everyone...

Page 11: ...ion This product carries the CE marking and complies with the applicable inter national requirements for product safety and electromagnetic compatibility according to the following Directives S Low Vo...

Page 12: ..._02_E00_00 HBM public MXFS 3 Operation 3 1 Connectors Fig 3 1 Front and back view of the MXFS 1 Optical Connectors FC APC 2 Ethernet Connectors 3 STATUS LED 4 Power connector 5 Firewire connectors 6 B...

Page 13: ...low 18 V the modules will switch off We recommend installing an uninterruptible power supply UPS in vehicles with battery operation between battery and module to compensate for voltage drops during st...

Page 14: ...ic MXFS NTX001 or KAB271 3 KAB272 FireWire or Fig 3 2 Connecting options for power supply 3 2 2 Connection to PC or data recorder 3 2 2 1 Single Ethernet connection 10 V 30 V DC TCP IP 100 Mbps KAB293...

Page 15: ...purpose 3 2 2 2 Multiple Ethernet connection with PTP synchronization 10 V 30 V DC Ethernet PTPv2 Switch 10 V 30 V DC Fig 3 4 Multiple connection via Ethernet and synchronization via PTPv2 Modules can...

Page 16: ...et cable is broken 3 2 2 3 Multiple Ethernet connection and FireWire synchronization Fig 3 5 Example of multiple connection via Ethernet with synchronization The supply voltage for the modules is loop...

Page 17: ...PC via Ethernet up to 100 m via FireWire electrically up to 5 m optically up to 300 m or via EtherCAT The following must be noted for TCP IP communication via Ethernet S We recommend that you retain t...

Page 18: ...HCP as well Manual configuration Deactivate DHCP and enter the same subnet mask address as used with your PC Change the IP address of your module so that it permits communication see example below Exa...

Page 19: ...Manual Configuration Module Settings PC Settings Fig 3 6 Example of settings for a direct connection Ethernet settings adjust the IP address of your PC If you want to operate the modules with a fixed...

Page 20: ...perties under TCP IP the Alternative Configuration in the TCP IP properties fixed IP address and subnet mask user defined On the control panel choose Network Connections Select the LAN connection The...

Page 21: ...Operation MXFS A05595_02_E00_00 HBM public 21 Select the Internet Protocol TCP IP and click on the Properties button Fig 3 8 Fig 3 8 TCP IPv4...

Page 22: ...Operation 22 A05595_02_E00_00 HBM public MXFS Set the IP address and the Subnet mask Fig 3 9 Fig 3 9 IP and Subnet Press OK...

Page 23: ...he DHCP server requires a certain amount of time to assign an IP address to the QuantumX module After connecting the hardware to the network or PC wait about 30 seconds before starting catman Otherwis...

Page 24: ...man comes with the firmware included This is usually stored under C Program Files HBM catman Firmware QuantumX B Please refer to the generic Quantum X user manual document A03031 available for downloa...

Page 25: ...h Flashing orange Download active system is not ready Firmware upgrade Red Error 3 4 Factory reset It is possible to reset the MXFS module to its factory settings which will delete the configuration i...

Page 26: ...on its front panel see Fig 3 1 The device is ready to receive several Fiber Bragg Grating FBG sensors connected in series on the same optical fiber Temperature Strain Strain Tilt Fig 3 12 Typical sen...

Page 27: ...00 nm to 1600 nm 2 Measured spectrum of the connected fiber reflection 3 Minimum wavelength in nm 4 Maximum wavelength in nm 5 Reference wavelength in nm value against which relative wavelength measur...

Page 28: ...3 FBG peak 4 Wavelength value in nm Reference Wavelength The wavelength value to which every measurement is compared to is called the reference wavelength Per each defined channel one reference wave...

Page 29: ...avelength value of the FBG peak at each acquired sample 3 5 1 4 Power The power value corresponds to the optical power reflected by the fiber Bragg grating at peak wavelength Fig 3 15 Power 1 Power ax...

Page 30: ...l interrogator is referred as the range of power values in between a fiber Bragg grating can be correctly identified and mea sured Fig 3 16 Dynamic Range 1 Power axis in dBm 2 Wavelength axis in nm 3...

Page 31: ...tion of the individual measurement of an FBG peak inside each configurable band MXFS considers a fixed threshold value of 3 dB easing the configuration of the device Fig 3 17 Every wavelength value is...

Page 32: ...either permanently or occasionally that multiple peaks overcome the threshold 4 and SPD eliminates problems on the measurements also for this situation Summarily the increased robustness provided is e...

Page 33: ...n be scaled to physical values Fig 3 19 Signal 1 Reference wavelength defined for the channel 0 in nm 2 Measured wavelength within the channel in nm 3 Wavelength variation within the channel in nm If...

Page 34: ...ts S2 S1 and S0 Conver sion formula is a second order poly nomial s2 0 2 s1 0 s0 Acceleration Converted wavelength variation into acceleration based on calibration coefficients S Conversion formula is...

Page 35: ...age 46 for more details Information Changing speed modes is only possible to perform via catman software 3 6 2 Distance effect For sweeping laser based Optical Interrogators such as the BraggMETER fro...

Page 36: ...tances increase Absolute wavelength measurement error Wavelength shift caused by acquisition rate and distance is Wavelength shift due to sweeping laser speed d 2 n RepRate FullRange DutyCycle c Where...

Page 37: ...4 347 6 200 23 2 463 4 500 57 9 1158 5 1000 115 9 2317 0 1500 173 8 3475 5 2000 231 7 4634 1 5000 579 3 11585 1 Tab 3 1 Shift in wavelength pm Distance compensation The distance compensation is advis...

Page 38: ...speed of light 3 108 m s 100 S s is the sensor wavelength measured at low acquisition speed 100 S s 2000 S s is the sensor wavelength measured at high acquisition speed 2000 S s With the distance rig...

Page 39: ...magnified connector is presented The dark gray circle corresponds to the fiber cladding and the small light gray circle is the core of the fiber One picture of a clean connector and one picture of a d...

Page 40: ...or spectrum 4 Dirty connector spectrum 5 Dynamic range reduction To clean an optical interrogator adapter use an appropriate cotton swab there are several cleaning swabs in the market frequently used...

Page 41: ...nnector It may also occur that the interrogator adapter sleeve breaks In this case when an optical connector is inserted it will not get proper alignment and measurements will be compromised A broken...

Page 42: ...es one license for catman Easy software which should be used to configure the device MXFS is compatible with catman versions 5 4 1 or above 4 1 Starting a project with MXFS Launch catman software On t...

Page 43: ...Fig 4 2 Connectivity Start a new measurement project Information MXFS gateway functionality is not supported in catman Please switch it off with MX Assistant before using MXFS with catman 4 1 1 Synch...

Page 44: ...MXFS 128 Fig 4 3 DAQ channels Channels that have defined bands ranges of wavelength on the device are seen as active and non defined channels are seen as inactive See sec tion 4 2 2 Configuring range...

Page 45: ...Operation MXFS A05595_02_E00_00 HBM public 45 Fig 4 4 Hiding inactive channels...

Page 46: ...ferent speed modes that correspond to two sweeping laser speeds which can be set in catman S High Speed mode 2000 S s S Low Speed mode 100 S s Fig 4 5 Acquisition rate Right click over any MXFS channe...

Page 47: ...rrection when needed 4 2 1 2 Sampling rate and filters Regardless of the acquisition speed down sampling and filtering is available on the module as any other QuantumX module Available sampling rates...

Page 48: ...500 1000 2000 5 0 1 0 2 0 5 1 2 5 10 20 50 100 200 500 1000 2000 10 0 1 0 2 0 5 1 2 5 10 20 50 100 200 500 1000 2000 20 0 1 0 2 0 5 1 2 5 10 20 50 100 200 500 1000 2000 50 0 1 0 2 0 5 1 2 5 10 20 50...

Page 49: ...ly become active after pressing the Apply button If you exit without applying the changes these will not be visible on the device not the channel list Fig 4 7 Ranges configuration window Visualization...

Page 50: ...k Fig 4 8 Fig 4 8 Update Spectrum Channels on the selected connector can be configured in different ways 4 2 2 1 Automatically define bands for the detected peaks The device can detect peaks on the re...

Page 51: ...MXFS A05595_02_E00_00 HBM public 51 Fig 4 9 Automatic band definition On the bottom of the window Define band width in nm The band width corresponds to the full wave length range of the channels Pres...

Page 52: ...ll be highlighted in blue on the table and the band will be highlighted in green on the graph number 1 in Fig 4 11 Writing on the table the minimum band value maximum band value and reference waveleng...

Page 53: ...e changes performed on the configure ranges interface are initially done only on the software level there is the need to transfer the definitions to the device once ready Press Apply for the changes t...

Page 54: ...be performed upon a selected channel are Delete By right click and selecting Delete Create or edit By double click on cell to fill in or edit Channel name Band minimum wavelength in nm Band maximum wa...

Page 55: ...Operation MXFS A05595_02_E00_00 HBM public 55 Fig 4 13 Editing or creating bands When all the desired bands are defined click on Apply button and close the configuration window...

Page 56: ...device select sensors and select Disconnect and reset sensor Fig 4 14 Disconnect sensors There are different types of sensors that can be configured into the device for more details please refer to s...

Page 57: ...Operation MXFS A05595_02_E00_00 HBM public 57 4 2 4 Sensors on the software Optical sensors are available on catman database under General Sensors Fig 4 15 Optical sensors on sensors database...

Page 58: ...the raw value out of MXFS device That means that it is the wavelength variation of the FBG peak in that channel No calculation is performed on the signal as all is processed inside the device see sec...

Page 59: ...can be defined without or with thermal compensation Strain without compensation Fig 4 17 Strain without compensation The gauge factor k of FBG strain gauges is given in their documentation The refere...

Page 60: ...me The selected channel for temper ature compensation with this method must be configured as a temperature sensor Fig 4 18 Strain with compensation using a temperature sensor The gauge factor k of FBG...

Page 61: ...at the zero strain instant and to the temperature measured by the temperature sensor at that same instant These values should be measured after installation They can be filled by hand or automatically...

Page 62: ...Strain with compensation using compensation FBG This value should be measured after installation It can be filled by hand or automatically defined by an actual measurement using the Measure button Str...

Page 63: ...calibration sheet They show a polynomial behavior with temperature Fig 4 20 Temperature sensor The Sn coefficients are the values given on the sensors documentation The reference wavelength of the te...

Page 64: ...Fig 4 21 Acceleration sensor The calibration coefficient S is the value given on the sensors documenta tion The reference wavelength of the FBG acceleration senor 0 should corre spond to the sensor s...

Page 65: ...ly one FBG Fig 4 22 Generic optical sensor The generic optical sensor computes the measurement as a second order polynomial function a b and c coefficients of the wavelength variation 0 of the FBG The...

Page 66: ...s project configura tion as an easy way to zero values at the beginning of a measurement for example To zero one or more sensors select the desired lines and press the Zero balance button on the top r...

Page 67: ...ature for relative mea surements but has to be performed with care in absolute and calibrated mea surements as for example temperature measurements especially if tempera ture values are being used for...

Page 68: ...t which all wavelength measurements are compared check subsection Reference Wavelength in chapter 3 5 1 3 Wavelength page 28 for more details on the device channel configuration Important While resett...

Page 69: ...he MXFS interrogator can be reset to its factory settings via catman software Right click over the device name and select Device Reset Fig 4 25 Device reset Select reset options Fig 4 26 Device reset...

Page 70: ...ands change sensor type to Wavelenght Relative delete zero balance value 2 Reset channel names will change all channel names to its default Device Name _CH_ Connec tor Channel e g MXFS8_CH_2 13 for ch...

Page 71: ...Operation MXFS A05595_02_E00_00 HBM public 71...

Page 72: ...www hbm com HBM Test and Measurement Tel 49 6151 803 0 Fax 49 6151 803 9100 info hbm com measure and predict with confidence A05595_02_E00_00 HBM public...

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