Portable Vertical MEMS Inclinometer
The Geosense Portable Vertical Inclinometer system utilises modern communication and Smart devices to enable the tilt data generated by the probe to be managed, stored and transferred directly from site via FTP, API, email or other communication platforms.
The system comprises a slimline detachable probe, a lightweight robust elongation-resistant cable, lightweight reel with Bluetooth communication to the smart android readout device, with a user-friendly app, plus storage and carry cases for all components.
The probe is fitted with industry standard MEMS biaxial sensors together with a signal conditioning board allowing the calibration factors to be stored within the probe. A digital output signal via the reel is sent to the Smart android device where it is converted to engineering units.
The double Vectran® reinforced cable and depth markers have been designed and tested with weight up to 40 kg to ensure their long-term stability.
To ensure data is not compromised by electro-magnetic interference and thus become inaccurate, even on noisy sites, the system has been designed and fitted with full 360 degree EMC protection within the probe, cable and reel and is fully tested in accordance with CE and FCC requirements.
Inclinometer Casing QJ
Geosense® QJ Inclinometer Casing is a quick connecting casing, precision extruded from ABS, with four precise keyways formed at 90 degrees which allow accurate installation of portable and in-place inclinometers.
The quick connecting joint makes it faster and easier to install than traditional glue & socket inclinometer casing with external couplers and does not require any special tools or tapes. On deep installations the time saving is significant.
It can be used in boreholes, fill material, cast into concrete or attached to structures and is designed to move with the ground, material or structure to provide inclination information over a period of time.
As the casing is designed to deform with movement of the ground or structure the useful life of the casing ends when the continued movement of the casing causes deformation of shear so that the inclinometer probe can no longer be placed into the casing. Larger casing generally ensures a longer life.
Where vertical settlement or heave is anticipated to be greater than 2% it is recommended to use telescopic sections to eliminate axial load on the casing which would cause excessive buckling.
A full range of accessories including bottom and top caps, anchors and groutable anchors are available and can be used in conjunction with magnetic targets for combined inclinometer/magnetic extensometers.
Inclinometer Casing XC
Geosense® XC (External Coupler) Inclinometer Casing is a precision extruded from ABS, with four precise keyways formed at 90 degrees which allow accurate installation of portable and in-place inclinometers.
Standard joints are made by using external couplers which are glued to each end of the casing. Telescopic sections are riveted together to allow movement during settlement and sealed with mastic and tape to prevent the ingress of water and grout.
Advantages of the XC Inclinometer casing is that it can be cut and re-joined on site allowing maximum flexibility and makes any damage easily repairable.
It can be used in boreholes, fill material, cast into concrete or attached to structures and is designed to move with the ground, material or structure to provide inclination information over a period of time.
As the casing is designed to deform with movement of the ground or structure the useful life of the casing ends when the continued movement of the casing causes deformation of shear so that the inclinometer probe can no longer be placed into the casing. Larger casing generally ensures a longer life.
Where vertical settlement or heave is anticipated to be greater than 2% it is recommended to use telescopic sections to eliminate axial load on the casing which would cause buckling.
A full range of accessories including bottom and top caps, anchors and groutable anchors are available and can be used in conjunction with magnetic targets for combined inclinometer/magnetic extensometers.
Casing Anchors
Inclinometer Casing Anchors are fixed to the bottom of the casing prior to installation to prevent uplift, usually due to buoyancy forces of water or grout. As soon as the anchor exits the bottom opening of the drill rod/borehole, the spring-loaded arms of the anchor are automatically extended to grip the borehole wall.
Anchors are available for 70 and 85mm casing in both snap seal and glue and socket coupling styles. A Grouting version of the anchor is available and Magnetic targets can also be integrated.
General casing accessories include:
- Repair couplings
- Caps
- Grout Caps
- Suspension Clamps
- Alignment Tool
- Anti-Flotation Tool
In-place Inclinometer
The Geosense® In-Place Inclinometer System (IPI) measures tilt and is used to calculate rotation and/or displacement in a vertical, inclined, or horizontal orientation. It is available in either a Uniaxial or Biaxial version.
The system consists of a series of wheeled sensors placed at various depths within the casing which are connected together either with extension rods or wire rope.
A digital bus system consisting of one single cable runs the length of the chain of connected sensors eliminating the need for a separate cable for each sensor and thus reducing the amount of cable required.
The extension rod system (IPI-ER) uses specially-designed connection rods to link sensors which allows them to move independently to each other without influencing the sensors above or below. This provides a profile of displacement over the complete length of the installation and the extension rod lengths can be varied to suit individual gauge length requirements. Sensors can also be concentrated in areas where movement is expected.
The wire rope system (IPI-WR) is used where only specific zones are of interest rather than the profile of the entire borehole.
Spiral Sensor
The MEMS Inclinometer Spiral Sensor is used to determine down-hole helical deformation of installed inclinometer casing. Installed casing spiral is a function of the manufacturing process, casing coupling, and installation technique.
It can be used with any vertical inclinometer system by using the same cable, reel, and hand-held readout. It is only necessary to read one data set; no 180 degree second reading set is required. Inclinalysis™ Inclinometer Software processes the resulting spiral data set.
Slip Indicator System
The Geosense® Slip Indicator comprises a flexible pipe with base plate which is inserted into the base of a borehole and surrounded with sand. When a lateral differential movement of the soil occurs, the flexible tube will become deformed in the zone of movement. Indicator probes, attached to a length of support rope, are used to determine the zone of movement.