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Rincent ND Technologies

Minidyn User Manual

Page 8

1.2

Specifications

Specifications

Value

Hardware

Minidyn version 6

Weight without mass

15 Kg

Falling weight

10 Kg or 20 Kg

Plate diameter

300 mm

Materials

Anodized aluminum

Falling height

75 cm to 100 cm

Environment

IP65

-20°C to +40°C

Load cell

Strain gauge

Max load: 25 kN

Error: < 0.3% FS

Displacement sensor

Vertical geophone

Frequency range: 4.5Hz…2500Hz

Resolution: 1µm

Modulus range

10 Kg weight : 10MPa to 80 MPa

20 Kg weight : 20MPa to 120 MPa

Power

Battery powered

USB charger (5 V, 0.5 A)

Data transfer

USB or Bluetooth

Autonomy

30 h on standby

5 h on measurement

Automatic shutdown after 15 min

Tableau 1: Minidyn hardware specification.

Содержание Minidyn V9

Страница 1: ...bis rue du bois briard 91080 Courcouronnes T l 09 72 32 45 98 E mail rincent ndt rincent fr SARL au capital de 300 000 euros n de SIREN 431 715 689 Rincent Minidyn LightWeigth Deflectometer User manu...

Страница 2: ...Rincent ND Technologies Minidyn User Manual Page 2...

Страница 3: ...1 Modulus calculation steps 17 2 2 Stiffness calculus algorithms 18 2 2 1 Max method 18 2 2 2 Integral method 18 2 2 3 Method comparison 20 2 3 Boussinesq formulae 20 2 4 Correlation algorithms 21 2...

Страница 4: ...Rincent ND Technologies Minidyn User Manual Page 4 3 6 2 Project and report selection 29 3 6 3 Make a measurement 29 3 7 Exportation 30 4 Warranty 31...

Страница 5: ...rsion 1 From 2014 to 2016 Minidyn version 2 Since 2017 Minidyn version 3 Since 2019 Minidyn version 4 Since 2020 Minidyn version 5 Since 2021 Minidyn version 6 Figure 1 Lightweight deflectometer Versi...

Страница 6: ...e is autonomous and send measurement date via USB or Bluetooth User can either Connect to the case using USB cable and Minidyn software on Windows Connect to the case using Bluetooth using an Android...

Страница 7: ...The Minidyn instrument is separated in two different part Measurement plate with sensors and acquisition Guiding rod with falling weight and elastomer buffer Assembling the Minidyn is done by sliding...

Страница 8: ...cm to 100 cm Environment IP65 20 C to 40 C Load cell Strain gauge Max load 25 kN Error 0 3 FS Displacement sensor Vertical geophone Frequency range 4 5Hz 2500Hz Resolution 1 m Modulus range 10 Kg wei...

Страница 9: ...hoc resistant Screen 4 WVGA Data transfer Email using Wi Fi or 3G Direct transfer using USB Storage capacity 100 000 measures Software installed Minidyn Android Functions Acquisition et review Connect...

Страница 10: ...Minidyn in two parts and take one part in each hand Figure 4 Transport de la Minidyn Since version 2 the Minidyn can be transported in one piece using the handle at the base of the plate 1 4 Drop wei...

Страница 11: ...ng of the weight Figure 6 10 kg configuration with 3 buffers left 20kg config with 5 buffers right 1 5 Acquisition case 1 5 1 Description The acquisition cases for all Minidyn version have the same fu...

Страница 12: ...e Minidyn If unused the Minidyn automatically power off after 15 minutes The Minidyn status led has several states Short blink The Minidyn is powered and wait for a Bluetooth or USB connection Slow bl...

Страница 13: ...rger for car or AC wall plug An USB port of a computer The stats for the battery red led are During normal use o Slow blink The battery is low The Minidyn will shut down in about 15 to 30 minutes o Fa...

Страница 14: ...is on the ground rotate the Minidyn back and forth using the handles to ensure a uniform contact with the ground Figure 8 Moving the plate to make a good contact 1 6 2 Make a test point Use the Minidy...

Страница 15: ...the palm of your hand If not the plate can bounce from the ground and make erroneous measurement Do not make two measurements at the same spot The first measurement will compact the ground and the se...

Страница 16: ...axis It is recommended to transport the Minidyn in two part one part in each hand Figure 10 Maximum stress for load cell 1 7 2 Weather You can use the Minidyn under light rain The acquisition box and...

Страница 17: ...eps used for modulus calculation Figure 11 Modulus calculation steps The digitized load and speed measurements from the sensors are filtered using a low pass filter of about 500 Hz Speed is the integr...

Страница 18: ...the ratio of maximum load to the maximum deflection Figure 12 Max method 2 2 2 Integral method The integral method is a method that take into account the dynamic parameters of the ground This method...

Страница 19: ...n also calculates a quality index Iq of the measurement This quality index is obtained calculating the difference between the measured signal and the simulated signal using the m c k parameters that w...

Страница 20: ...ulated the dynamic behavior of the ground the resulting stiffness is lower that the stiffness calculated using Integral method Bias form 10 to 20 is observed and have to be taken into account during t...

Страница 21: ...correlation Linear correlation is used primarily to obtain an equivalent modulus on a restrained modulus value range and for a given platform Coefficient K is typically comprised between 1 and 2 Coeff...

Страница 22: ...0 60 80 150 180 K 1 33 1 60 2 00 2 00 2 14 2 25 Tableau 3 Correlation table ZTVE STB 94 The Minidyn software include an exponential correlation with the EDYN2 equivalent modulus NFP 94 117 2 standard...

Страница 23: ...ogle play store 3 1 2 Bluetooth pairing Pairing must be done between your smartphone and Minidyn before making measurement Steps can vary from Android version for example here are the procedure for 4...

Страница 24: ...Minidyn Bluetooth is in majuscule and without space RNDTBT Figure 17 Pairing the Minidyn 3 1 3 Fist launch At first launch it is recommended to change Default operator name Modulus calculation paramet...

Страница 25: ...tions The information of the current project Navigation button Figure 18 Main interface 3 3 Settings Setting are change using the Setting button If a project is already loaded a windows will pop up to...

Страница 26: ...s open you can change the way the modulus is calculated and all the measurements will be reprocessed accordingly 3 3 2 Acquisition configuration Number of drop per points Several drop of the weight ar...

Страница 27: ...default Software configuration Operator Name of the person or company that do the measurements Demo mode The demonstration mode simulate a fake Minidyn hardware and measurements are software generated...

Страница 28: ...the name of the project is mandatory in the information tab Figure 20 Projects tabs 3 5 2 Report The Report button is activated when a project is selected As for the project you can select or create a...

Страница 29: ...To do test points just touch the Measure button and a temporary project a report will be created 3 6 2 Project and report selection To save measurement you have to create a PV and a report 3 6 3 Make...

Страница 30: ...n done use the stop button to finish the measurement 3 7 Exportation Exportation is used to send all the project information and measurements to an email or a file to be read afterward on the Minidyn...

Страница 31: ...essories have a one year warranty Every degradations resulting from an improper use of the instrument or its accessories are not warrantied form example but not limited to Degradation caused by a fall...

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