digi-Bolt Instrumented Rebar
The digi-Bolt allows engineers to monitor the development of strain and load along rigid bolts. As such it is possible to assess the Factor of Safety against steel rupture and the potential to predict the risk of catastrophic structural failure.
- Output
- Microcontroller provides output directly in strain
- Strain gauges
- 2 to 6 epoxy resin encapsulated strain gauges
- Gauge type
- Miniature long base length inductive strain gauge, recessed into a 3.2mm groove
Overview
In detail
Bolt strain gauge
Geosystems offer the digi-Bolt strain gauge with 2 to 6 epoxy resin encapsulated strain gauges, in two diametrically opposed slotted channels, which are designed to withstand the traumas of installation. Each digi-Bolt strain gauge is subjected to a multipoint calibration. The coefficients are written into a microcontroller memory, and a precise linear function is used to enhance linearity, the output signal, and applied strain.
How does it work?
The digi-Bolt is based on a miniature long base length inductive strain gauge, small enough to be recessed into a 3.2mm groove in the bolt. A miniature inductive displacement sensor comprising a precision coil and a high permeability core attached to a stainless steel rod. The ends of the displacement sensor are secured to the bolt at a specified distance apart referred to as the base length (BL). This base length may vary between 300mm and 2000mm so comprising a long baselength strain gauge.
Applications
The technology can be applied to rebar, threaded bolts, and various other steel elements used in mining and civil construction/engineering. Utilising inductive strain gauge technology the digi-Bolt provides data that allows engineers to improve designs, installation quality controls, and long-term operational assessment of projects.
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Specifications
Technical specifications
- Strain gauges
- 2 to 6 epoxy resin encapsulated strain gauges
- Gauge type
- Miniature long base length inductive strain gauge, recessed into a 3.2mm groove
- Base length
- 300mm to 2000mm
- Readout head
- Encapsulated in a stainless steel tube
- Output
- Microcontroller provides output directly in strain
- Calibration
- Every instrument multipoint calibrated, with a calibration report
- Peripherals
- digi_LOGGER data-logging and GATEWAY TCP/IP upload
Downloads
Documentation, openly available
Everything you need to specify, install and integrate the digi-Bolt Instrumented Rebar — no login, no paywall.
Related
Often specified alongside
Geosystems
Vibrating Wire Strain Gauge SM-5
- Range
- 3000 µε
- Accuracy
- +/- 0.5% F.S.
- Temp
- −20 to +80°C
- Range
- 200 to 35,000 kPa (standard steps up to 35,000 kPa)
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