BH-Profile in-place Inclinometers

Reference products codes: S431HD, S432HD, S431HA, S432HA

Borehole profile in-place inclinometers offer continuous remote monitoring of casings deformed by active soil movements.

BH-Profile chain consists of a number of MEMS IPI probes with carbon fiber extension rods and a terminal wheel assembly to close the chain.

Thanks to the digital RS-485 signal output, they can be connected to OMNIAlog datalogger or WR-Log wireless system for remote data management.

BH-Profile in-place inclinometers are compatible with all Sisgeo’s inclinometer casings: standard, Easy Lock and Quick Joint

Tiltmeters are instruments that measure angles respect to the gravity acceleration vector. To get this result an accelerometer is required. It measures the projection of acceleration gravity on its sensing axis. Sensor can have 1, 2 or even 3 sensing axes.

The MEMS (Micro Electro Mechanical Systems) implementation of accelerometers it’s pretty young (about 20years) but mature enough to have its strong reliability been proven. MEMS are indeed silicon chips machined to create a mechanical part inside. The required electronic to read out the signal is inside the same chip.

The working principle is a spring-mass system: a mass (rotor) is anchored with springs to a fix frame (stator). When an acceleration occurs, the rotor moves respect to the stator loading or unloading the springs. That’s it: the displacement measurement is proportional to the applied acceleration. Displacement is measured with different technologies inside the chip but in its simplest form is related to a capacitance measure.

Sisgeo uses the state-of-the-art of MEMS accelerometers that implement several methods to compensate temperature variation and reduce the cross-axis error reaching very high accuracy.

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Digital BH-Profile In-Place Inclinometers chain installation

Digital BH-Profile In-Place Inclinometers chain installation

On 19th and 20th September Sisgeo and our Polish partner GEOD participated to the 3rd Engineering Geology Workshop at the AGH University of Science and Technology Stanisław Staszic in Krakow. The workshop was addressed to professionals, companies and academicians and was organised by the Faculty of Geology, Geophysics and Environmental Protection and Department of Hydrogeology and Engineering Geology. GEOD and SISGEO held a workshop on “Drilling and sampling methods in geotechnical studies”, composed by a theoretical part in class and a practical part on field.