The LT-Inclibus gauge is able to monitor local tilting along a line, assuring the alignment, distance and measuring axis orientation between the gauges.
The standard segment is composed by a 2m fibre glass rod with two biaxial waterproof gauges, 1m spaced.
The chain of LT- Inclibus can be installed within a borehole, mounted to a surface of a structure, laid along a trench or buried in a concrete mass.
It is possible to have one or four gauges on the 2m rod upon request.
The rods are connected through mechanical joints, while the gauges are connected in a RS485 chain. The logger can read both the inclination of the two axis in engineering units and the internal sensor diagnostics for each measuring point (temperature, relative humidity and voltage supply).
Customers can use any electronic device compatible with RS485 and Modbus RTU protocol as a logger. The LT-Inclibus gives a complete and transparent array of data in engineering unit, as a result.
• Deck bridges deformation
• Unstable slopes
• LNG tanks
• Deep excavations
• Dam slope stability
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.