Florida APT Instrumentation and Data Acquisition System |
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Laser Profile System. Dynatest Consulting, Inc.
Surface profile (rut depth) on asphalt pavement systems. Used on concrete slabs for measurement of curling .
This is a custom design, engineered and installed by Dynatest. Produces highly accurate and repeatable results. FDOT has written a Visual Basic program for data analysis.
Description: Titanium Surface Gage
Resistance: 120 Ω
Gage Length: 50 mm
Gage Factor: 2.07
Installation: Surface
Linear Displacement Sensor
Vishay/ Micro Measurements
Model HS-50
General purpose displacement sensor for measuring deformation in asphalt and displacement in concrete slabs.
Strain gage based displacement transducer. Much easier to setup and use than LVDT's. About $550 each.
Embedment strain gage
Vishay/ Micromeasurements
Model EGP-5-350
Strain measurement in concrete slabs greater than 150 mm thick.
Reasonably priced and robust. About $50.00 each.
Embedment strain gage
Soltec/Kyowa
Model KM-120-120-H2-11-W1M3
Strain measurement in concrete slabs less than 150 mm thick.
Same active gage length as the one above, but packaged in a narrower and thinner case making it less obtrusive in thinner slabs.
Vishay Model 6100
Strain and displacement data acquisition in asphalt and concrete.
Easy to setup and operate. Versatile and capable. Can accept 20 cards for strain, displacement, temperature, etc measurement. One channel per card.
Description: Embedded Concrete Foil
Gage Resistance: 120 Ω
Gage Length: 120 mm
Gage Factor: 2.00
Installation: Embedded
Kyowa PC-12 Strain Gage Cement – Cement with hardener used as a gap filler in surface preparation for gage installation on both asphalt and concrete.
Tokyo Sokki CN Strain Gage Adhesive – One part cyanoacrylate adhesive used for the strain gage to test material bond.
¼” – 20 Stainless Steel Threaded Rod and Nuts – Used as the vertical support for embedded concrete gages
1” Width Perforated Steel Strip – Used with the threaded rod and nuts for horizontal concrete gage support (See Figure1)
Figure 1: Concrete gage mounting configuration
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Florida APT Instrumentation and Data Acquisition System |
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Pressure Cell
RST Instruments
Model LPTPC04-S
Pressure cell for use in Hot Mix Asphalt
Selected for its high temperature rating and anticipated survivability in the HMA paving process. Installed three (50 psi, 100 psi and 150 psi) in our most current asphalt test track. All survived. Cost $1075.00 each.
Pressure Cell
Geokon, Inc.
Model 3510-2X-1MPA
Pressure cell for use in soils testing.
Selected as Geokon is known to provide a quality produce. This pressure range provides a reading 75% of full scale under a 6 kip load with the cell buried 6 inchs deep. Of the 18 installed in a recent geotechnical investigation all survived the construct
Figure 2: Earth Pressure Cell
Multi-Point Thermocouple
Pyromation, Inc.
Part Number: KKK38UZZ-006-304-15-T1A-072-012-2
Measurement of asphalt temperature at three depths (surface, 50 mm and 100 mm) during HVS testing.
Custom manufactured thermocouple designed for FDOT's specific testing needs. Rugged and performs exceptionally well. Pyromation, Inc. is customer friendly and easy to deal with.
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Figure 3: Thermocouple tree used to acquire temperatures at different depth intervals of the concrete slab (k-type Wire). Old version |
Figure 4: New Version (plastic rod instead of wood) |
Thermocouple Wire
Pyromation, Inc.
Part Number: K20-1-507
Type K thermocouple wire for general purpose temperature measurement in asphalt, concrete, and ambient air.
This has a Teflon insulation and can be used successfully without further protection in the HMA paving process. We make our own junctions simply by twisting the wires together with a special purpose tool.
Wire Twister Pliers
Making thermocouple junctions.
Handy tool which will save a lot of money by making your own T/C junctions. In a test against commercially procured, welded T/C junctions, the wire twist performed equally well.
Temperature Data Acquisition
National Instruments FieldPoint
Used for temperature data acquisition in concrete.
The FieldPoint system consists of a communications module (serial or Ethernet interface) and mating modules for temperature, strain, voltage, current, etc. A versatile system, but requires a very computer knowledgeable technician to setup and configure.
Vishay Model 6100
Strain and displacement data acquisition in asphalt and concrete.
Easy to setup and operate. Versatile and capable. Can accept 20 cards for strain, displacement, temperature, etc, measurement. One channel per card.
Figure 5: Vishay Model 6100 |
Figure 6: National Instruments PCI-6031E |
Multifunction Data Acquisition System (Figure 6)
National Instruments
PCI-6031E
Currently used only for Pressure Cell data acquisition.
This is a PCI card for installation in a personal computer. Easy to setup and operate. Comes with VI Logger software.
SCXI Modular Data Acquisition and Signal Conditioning System
National Instruments
Single system for the integration of temperature, strain, force, load, pressure, acceleration, etc.
An exceptionally versatile system. Installed in an environmentally controlled enclosure, and positioned on the test tracks near the instrumentation. Short lead length reduces noise effects. Signals are transmitted to the HVS Control Room via a fiber op.
LabVIEW Data Acquisition and Control Software
National Instruments
Collection, filtering, logging and display of data from most any type of instrumentation.
FDOT Staff has written many executables using LabVIEW which we would be happy to share. Just let us know what your needs are.
National Instruments FieldPoint
Tokyo Sokki – KM-100HAS
Description: Embedded H-Gage Resistance: 350 Ω
Gage Factor: 2
Installation: Embedded
Embedment strain gage for use in Hot Mix Asphalt
Figure 7: Tokyo Sokki – KM-100HAS
Description: Surface Gage
Resistance: 120 Ω
Gage Length: 20 mm OR 30 mm
Gage Factor: 2.13
Installation: Surface
General purpose surface foil gauge for surface strain measurements.
Figure 8: Tokyo Sokki – PFL-20-11-5L
Description: Embedded Concrete Foil
Gage Resistance: 350 Ω
Gage Length: ??.?? mm
Gage Factor: 2.00
Installation: Embedded
Sensing (gauge length) is 100mm
Figure 9: Vishay – EGP-5-350