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Technical Details

6

A4263-3.5

HBM: public

FS64

: High multiplexing capability

Connection of a large number of sensors to a single opti
cal fiber, reducing network and installation complexity.

: Remote sensing

Large distance between sensors and interrogator (sev
eral kilometers).

: Compatible with most interrogators

Provided with calibration sheet, allowing easy and accu
rate configuration.

: Self-referenced

Based on the measurement of an absolute parameter -
the Bragg wavelength - independent of power fluctua
tions.

1.1.3

Applications

HBM FiberSensing tilt sensors can be used in a large
range of monitoring applications, such as in slopes and
bridge pillars.

: Civil Engineering
: Geotechnics

1.1.4

Quality

All HBM FiberSensing's processes are strictly controlled
from development to production. Each product is sub
jected to high standard performance and endurance
tests, individually calibrated and checked before ship
ping.

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Содержание FS64

Страница 1: ...Installation Guide English FS64 Tilt Sensor...

Страница 2: ...ncelos Costa 277 4470 640 Maia Portugal Tel 351 229 613 010 Fax 351 229 613 020 fibersensing hbm com www hbm com fs Mat 7 2002 4263 DVS A4263 3 5 HBM public 05 2015 Sensor Design Version v2 1 E Hottin...

Страница 3: ...10 2 1 2 Needed Tools 11 2 2 Parallel Tilt Sensor 12 2 2 1 Preparing the Surface 12 2 2 2 Placing the Sensor 14 2 2 3 Unlocking the Sensor 16 2 2 4 Vertically Aligning 21 2 2 5 Protecting the Sensor 2...

Страница 4: ...3 3 5 HBM public FS64 3 Sensor Configuration 33 3 1 Sensor Calibration Sheet 33 3 1 1 General Information 34 3 1 2 Technical Information 34 3 1 3 Tilt Computation 34 3 2 Temperature Effect on the Sens...

Страница 5: ...erview The FS64 Tilt Sensor is a Fiber Bragg Grating FBG based sensor designed to measure small variations of angle towards the vertical The sensor uses two FBGs in an innovative push pull configurati...

Страница 6: ...nd accu rate configuration Self referenced Based on the measurement of an absolute parameter the Bragg wavelength independent of power fluctua tions 1 1 3 Applications HBM FiberSensing tilt sensors ca...

Страница 7: ...nsing networks in large structures is made simpler with HBM FiberSensing accessories These include cables especially designed to resist harsh environments as in civil engineering not only during const...

Страница 8: ...flectivity 65 Side lobe suppression 10 dB Inputs Outputs Cable type 3 mm outdoor armor Cable length 2 m each side 5 cm Connectors FC APC SC APC NC No Connectors Environmental Operation temperature 20...

Страница 9: ...4263 3 5 HBM public 9 1 2 1 Signal Convention The FS64 Tilt Sensor signal convention sets negative angle value for clockwise rotation and positive angle value for counterclockwise rotation see Fig 1 1...

Страница 10: ...Sensor Package Included Material Parallel Tilt Sensor1 Orthogonal Tilt Sensor2 Biaxial Tilt Sensor3 Tilt Sensor 1 1 2 Calibration Sheet 1 1 2 Mounting plate sheet 2 2 Bracket 4 4 Umbrako Screw 8xM6 L...

Страница 11: ...ted screwdriver L30 D2 8 E0 7 mm L100 D2 8 E0 7 mm L100 D2 8 E0 7 mm D7 0 E1 1 mm D7 0 E1 1 mm D7 0 E1 1 mm Mechanical anchor Hilti HSA R M6 5 suggested Hilti HSA R M8 5 suggested Hilti HSA R M8 5 sug...

Страница 12: ...be vertical and regular Information If the sensor wall is not vertical it will not have the expected behavior There is the possibility to design mounting plates to ensure the right position of the sen...

Страница 13: ...igh tening up the sensor its back can get deformed which will influence the sensor s behavior Afterwards mark two points 20 cm apart and vertically aligned Fig 2 2 Information The tilt sensor has a sl...

Страница 14: ...mm Verify the screws position with a measuring tape and then anchor them definitely Fig 2 3 tightening them with a torque of 5Nm Remove the nut before proceeding 2 2 2 Placing the Sensor Carefully tak...

Страница 15: ...g 2 4 Fig 2 5 Place the washer and hexagon nut on both anchors Fig 2 5 With the help of a bubble level rotate the sensor along the slot and place the sensor as close to the vertical as possible Fig 2...

Страница 16: ...cking the Sensor Important The following installation steps should be performed in accordance with the presented order Please read the next introduction carefully before unlocking the sensor The FS64...

Страница 17: ...y non removable screw To be unfastened only non removable screw To be unfastened and removed removable screw Fig 2 7 1 Any unlocking action should only be performed after complete fixation of the sens...

Страница 18: ...is control is to configure the sensor so that the tilt value is measured equation shown on number 2 in Fig 2 8 Nevertheless if the available equipment does not have software to perform this auto matic...

Страница 19: ...grating s wavelengths The unlocking of the sensor should be done slowly and by changing sides frequently ensuring that the wavelengths change is performed in a controlled way and equally to both FBGs...

Страница 20: ...unscrew the locking screws on the front panel of the sensor as in Fig 2 10 changes in wavelengths should never be greater than 1 nm See number 3 on Fig 2 7 4 The side locking parts are the last to be...

Страница 21: ...be smaller Nevertheless the unscrewing should be per formed in small steps and alternately as in the front screws 2 2 4 Vertically Aligning Now it is time to set the final alignment of the sensor Ens...

Страница 22: ...ensor If the sensor is to be placed outdoors it should be installed inside a box with a proper IP This box will pro tect the sensor from moisture sun and the influence of the shades on the measurement...

Страница 23: ...tation before being removed from its position To lock the tilt sensor please proceed in reverse order of the explained in sec tion 2 2 3 page 16 2 3 Orthogonal and Biaxial Tilt Sensor 2 3 1 Preparing...

Страница 24: ...Sensor Installation 24 A4263 3 5 HBM public FS64 Fig 2 14 Fig 2 15 Use the four black brakets to keep the plates at a 90 deg angle Fig 2 15...

Страница 25: ...the surface as for a single tilt sensor Using the mounting plate mark and drill the four points in order to anchor the plate vertically Fig 2 16 Drill the holes according to the chosen M8 anchors sug...

Страница 26: ...of 15 Nm is suggested with the desired orien tation Ensure that the orthogonal plate is vertical Fig 2 17 Information If the sensor surface is not vertical it will not have the expected behavior Use t...

Страница 27: ...ion FS64 A4263 3 5 HBM public 27 Fig 2 18 Fig 2 19 Apply the two M6 L30 screws into the two vertically aligned holes on the orthogonal plate Fig 2 19 The mounting plate is now ready to hold the tilt s...

Страница 28: ...lic FS64 Fig 2 20 2 3 3 Placing and Unlocking the Tilt Sensor Take the first tilt sensor out of the transportation box and place it on a stable surface Remove both mass locking screws shown on Fig 2 2...

Страница 29: ...i unlocked Take extra care when handling the sensor or performing any actions next to the sensor Carefully place the sensor on the support Fig 2 22 Proceed as if placing a single tilt sensor Align the...

Страница 30: ...nnect the sensor to the interrogator as explained in section 2 2 3 page 16 Control the wavelengths while unscrewing the locking screws on both sides of the sen sor see number 3 on Fig 2 7 If necessary...

Страница 31: ...se Slowly remove the nuts and change the tilt sensor to the other plate of the mounting base Fig 2 25 Fix the sen sor as described in section 2 2 2 page 14 for a single tilt sensor Finish unlocking th...

Страница 32: ...d tighten up the screws as described for the uniaxial sensor Fig 2 27 Fig 2 27 2 3 5 Protecting the Sensor Protect the sensors as described in the section on the uniaxial sensor 2 3 6 Locking the Sens...

Страница 33: ...guration FS64 A4263 3 5 HBM public 33 3 Sensor Configuration 3 1 Sensor Calibration Sheet Every HBM FiberSensing sensor is provided with a cali bration sheet The layout of this document is presented b...

Страница 34: ...is shown in the technical information table number 2 in Fig 3 1 These values should be used for tilt computation 3 1 3 Tilt Computation Number 3 in Fig 3 1 exemplifies the calculations that should be...

Страница 35: ...n at the zero moment in pm where CWL2 CWL1 S WLn is the measured wavelength of FBG n in pm 3 2 Temperature Effect on the Sensor The tilt sensor is designed with two Fiber Bragg Gratings in a push pull...

Страница 36: ...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 A4263 3 5 7 2002 4263 HBM public...

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