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Inverted Pendulum shown with RxTx Telependulum (left) with close-up (right)
Inverted Pendulum shown with RxTx Telependulum (left) with close-up (right)
RxTx Telependulum shown outside of completed system Inside, uncovered view of the inverted pendulum tank

PENDULUM SYSTEM

CATEGORY > Inclinometers + Tilt Sensors

PENDULUM SYSTEM

DESCRIPTION

RST’s direct and inverted pendulums are simple, and very reliable and accurate systems used to monitor internal lateral deformations of concrete dams, dam foundations and abutments, tall industrial buildings and bridge piers.

The direct pendulum (plumbline) consists of a stainless steel wire attached to a fix point at a top of structure to be monitored, a weight, and a tank containing damping fluid to damp movements of the weight due to wind and air circulation.

Displacements relative to the wire can be measured by a portable coordinometer or the RxTx Telependulum, which allows remote continuous monitoring of deformations.

The inverted pendulum uses the same readout units, and includes a stainless steel wire anchored in the structure foundation with a float fixed at its upper end. The float, which is free to move in a tank, tensions the wire and keeps it vertical. Once anchored in stable point in foundation it measures absolute deformation of the structure and it’s used as a reference for surface geodetic surveying.

RST’s pendulums are easy to use and very accurate instruments in long- term use, and are an excellent choice for monitoring of concrete dams. The plumblines are usually installed in shafts or pipes extending vertically from crest of the dam to a bottom monitoring gallery located near the dam foundation. Wherever feasible horizontal movements of the dam, in both the upstream-downstream direction and left-right bank direction, are measured at several elevations to obtain the deflected position of the dam section over the full height of the structure.

The length of the plumbline is limited up to 60 m. Longer configurations are not recommended due to excessive vibration of the wire generated by air circulation and wind in the pendulum shaft. To monitor deflection of a complete profile of a very high concrete dam (>> 60 m) several plumblines can be installed in vertical alignment one above the order starting with an inverted pendulum anchored in borehole in the dam foundation.

QUICK SPECS

Precision of ±0.05 mm.


Resolution of 7.5 µm.


Range of 50 x 50 mm.


Frequency of 60/50 Hz ± 10%.


Simple, reliable and accurate systems for long term use.


Available as both direct and inverted pendulum systems.


Inverted pendulum measures absolute deformation of structure and can be used to monitor movement of a structure during its construction.


Inverted pendulum can be successfully used as reference for geodetic surveying.


RxTx Telependulum for remote monitoring and data logging.


Direct pendulum comes with a wire tensioning weight and damper tank.


Inverted pendulum comes with a float unit and anchoring weight.

APPLICATIONS

To monitor internal lateral deformations of concrete dams, the dam foundations and abutments.


To monitor movement of toll industrial buildings and bridge piers.

BENEFITS

Increase Productivity


High Accuracy


High Reliability

DESCRIPTION

RST’s direct and inverted pendulums are simple, and very reliable and accurate systems used to monitor internal lateral deformations of concrete dams, dam foundations and abutments, tall industrial buildings and bridge piers.

The direct pendulum (plumbline) consists of a stainless steel wire attached to a fix point at a top of structure to be monitored, a weight, and a tank containing damping fluid to damp movements of the weight due to wind and air circulation.

Displacements relative to the wire can be measured by a portable coordinometer or the RxTx Telependulum, which allows remote continuous monitoring of deformations.

The inverted pendulum uses the same readout units, and includes a stainless steel wire anchored in the structure foundation with a float fixed at its upper end. The float, which is free to move in a tank, tensions the wire and keeps it vertical. Once anchored in stable point in foundation it measures absolute deformation of the structure and it’s used as a reference for surface geodetic surveying.

RST’s pendulums are easy to use and very accurate instruments in long- term use, and are an excellent choice for monitoring of concrete dams. The plumblines are usually installed in shafts or pipes extending vertically from crest of the dam to a bottom monitoring gallery located near the dam foundation. Wherever feasible horizontal movements of the dam, in both the upstream-downstream direction and left-right bank direction, are measured at several elevations to obtain the deflected position of the dam section over the full height of the structure.

The length of the plumbline is limited up to 60 m. Longer configurations are not recommended due to excessive vibration of the wire generated by air circulation and wind in the pendulum shaft. To monitor deflection of a complete profile of a very high concrete dam (>> 60 m) several plumblines can be installed in vertical alignment one above the order starting with an inverted pendulum anchored in borehole in the dam foundation.

QUICK SPECS

Simple, reliable and accurate systems for long term use.


Available as both direct and inverted pendulum systems.


Inverted pendulum measures absolute deformation of structure and can be used to monitor movement of a structure during its construction.


Inverted pendulum can be successfully used as reference for geodetic surveying.


RxTx Telependulum for remote monitoring and data logging.


Direct pendulum comes with a wire tensioning weight and damper tank.


Inverted pendulum comes with a float unit and anchoring weight.

APPLICATIONS

To monitor internal lateral deformations of concrete dams, the dam foundations and abutments.


To monitor movement of toll industrial buildings and bridge piers.

BENEFITS

Increase Productivity


High Accuracy


High Reliability

CONTACT US

RST Instruments Ltd.

11545 Kingston Street
Maple Ridge, BC
Canada V2X 0Z5

604-540-1100

1-800-665-5599

Fax: 604-540-1005

info@rstinstruments.com

CONNECT WITH RST

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ASK A QUESTION

CONTACT US

RST Instruments Ltd.

11545 Kingston Street
Maple Ridge, BC
Canada V2X 0Z5

604-540-1100

1-800-665-5599

Fax: 604-540-1005

info@rstinstruments.com



CONNECT WITH RST

Linkedin icon
Youtube icon

ASK A QUESTION

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