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flexDAQ Data Logger (with TDR100) shown with a reel of Coaxial Cable
flexDAQ Data Logger (with TDR100) shown with a reel of Coaxial Cable
Screenshot of the Time Domain Reflectometry software Portable Time Domain Reflectometry (left) shown with close-up (right)

TIME DOMAIN REFLECTOMETRY

CATEGORY > Inclinometers + Tilt Sensors

TIME DOMAIN REFLECTOMETRY

DESCRIPTION

Metallic Time Domain Reflectometry (MTDR) is a simple and economical way of detecting and interpreting rock and soil mass response to underground and surface mining using coaxial cables grouted in boreholes. MTDT can be used effectively to locate rock and soil mass movements.

MTDR involves the installation of a coaxial cable in a borehole filled with grout that matches existing soil or rock conditions. A TDR cable test unit is employed to generate a voltage pulse along the cable and receive reflections. Reflections are generated by cable deformations, abrasions, and severing. Crimps at known locations along the cable are used to provide depth datum.

As movement occurs, the reflections along the cable change as the cable deforms. By connecting the cable tester to a PC through an RS232 cable, MTDR reflection can interpreted by software, thereby inferring location, type and rate of earth movement. MTDR systems can be combined with data loggers and multiplexers to allow remote readings of multiple cables.

QUICK SPECS

Economical installation and low data acquisition costs.


Ability to monitor deformation along the entire length of the borehole.


Can be used with RST's flexDAQ Data Loggers and GeoViewer software.

APPLICATIONS

Monitoring rock and soil movement.


Monitoring subsidence above abandoned underground mines.


High wall slope monitoring in open pit mines.

BENEFITS

Increase Safety


Increase Productivity


High Accuracy


Cost Effective

DESCRIPTION

Metallic Time Domain Reflectometry (MTDR) is a simple and economical way of detecting and interpreting rock and soil mass response to underground and surface mining using coaxial cables grouted in boreholes. MTDT can be used effectively to locate rock and soil mass movements.

MTDR involves the installation of a coaxial cable in a borehole filled with grout that matches existing soil or rock conditions. A TDR cable test unit is employed to generate a voltage pulse along the cable and receive reflections. Reflections are generated by cable deformations, abrasions, and severing. Crimps at known locations along the cable are used to provide depth datum.

As movement occurs, the reflections along the cable change as the cable deforms. By connecting the cable tester to a PC through an RS232 cable, MTDR reflection can interpreted by software, thereby inferring location, type and rate of earth movement. MTDR systems can be combined with data loggers and multiplexers to allow remote readings of multiple cables.

QUICK SPECS

Economical installation and low data acquisition costs.


Ability to monitor deformation along the entire length of the borehole.


Can be used with RST's flexDAQ Data Loggers and GeoViewer software.

APPLICATIONS

Monitoring rock and soil movement.


Monitoring subsidence above abandoned underground mines.


High wall slope monitoring in open pit mines.

BENEFITS

Increase Safety


Increase Productivity


High Accuracy


Cost Effective

NOTE: Images are not shown to size; view specifications for actual diameters. Contact RST for complete details on exact specifications and suitable applications.
Kevlar® is a registered trademark of E.I. duPont de Nemours and Company or its affiliates.

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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