Nouvelles

Read the latest Roctest Smartec Telemac Newsletter (Issue 3 2012)
 
Contents:
- NEW PRODUCTS: New Vibrating Wire Reading Interface (datasheet)
- NEW APPLICATIONS: A Milestone in the Structural Health Monitoring (SHM) of High-Rise Buildings. Today, 400 Buildings in Singapore Are Monitored.
- Upcoming events and Webinars

Two papers form the 5th International Conference on Structural Health Monitoring of Intelligent Infrastructure (SHMII-5), held in Cancun, Mexico on 11-15 December 2011, are now available:

• Cost-Benefits Analysis in SHM Projects, D. Inaudi, 5th International Conference on Structural Health Monitoring of Intelligent Infrastructure (SHMII-5) 2011 11-15 December 2011,Cancún, México , (2011)
• Localization of instability zones in levees, landslides, sinkholes and tunnels with distributed optical fiber sensors, D. Inaudi, R. Belli, 5th International Conference on Structural Health Monitoring of Intelligent Infrastructure (SHMII-5), 11-15 December 2011,Cancún, México , (2011)

The multi-level vibrating wire piezometer is perfect for measuring pore pressures at various depths beneath a single surface location. It allows for quick and reliable installations because multiple piezometers are connected to a single communication cable, which is in turn connected to the data acquisition system or readout. This configuration eliminates complicated and time consuming and, therefore, costly process for installing multiple single sensors in the same borehole. This simplified installation not only reduces installation time but also minimizes the potential for hydraulic communication between sensors that might lead to erratic readings. A typical installation of the multi-level piezometer utilizes a direct grouting installation so that only the multi-level piezometer string and a grout injection tube are needed to complete the installation. Once the grout has hardened, the piezometers are isolated from one another, allowing precise measurements of pore water pressure changes at various depths.

The multi-level piezometers incorporate the same standard features included in our single PW-series vibrating wire piezometers. The main function of this multi-level piezometer is to measure pore water pressure beneath the ground surface. It provides significant advantages in terms of time, resources and cost reduction related to installation, while providing quick and reliable reading at various depths. The multi-level piezometer allows the customer to define sensor spacing along the readout cable providing precise depth control based on site specific requirements. Junctions between each piezometer and the main cable are reinforced using epoxy resin for a waterproof and durable seal. The time proven design of the PW-series sensors allows them to be tied to the multi-level piezometer core cable and provide very reliable long-term performance. The sensor wire is fabricated using proven methods for ensuring an exceptional long-term stability. It is isolated in a vacuum sealed chamber to protect against corrosion. A gas filled spark gap integrated into each sensor protects against electromagnetic surges and radio frequency interference. A triple watertight barrier is installed at the cable end to prevent water infiltration to the sensor core. To this day, thousands of PW sensors have been installed and operate throughout the world.

Datasheet

 Read Paper

Read the latest Roctest Smartec Telemac Newsletter (Issue 11 2011)
 
Contents:
- PISA-M: The new In-Place-Inclinometer (Datasheet)
- Application: Felsenau viaduct in Bern
- Exhibits and Webinars schedule

Read the latest Roctest Smartec Telemac Newsletter (Issue 10 2011)

Contents:
- New CONVEX-D digital tape extensometer
- Detection and localization of tunnel movements with distributed optical fiber sensors
- Strain monitoring on a pipeline crossing the Calaveras fault zone in California
- Exhibits and Webinars schedule

Le 31 août dernier, Nova Metrix LLC (Nova Metrix) a annoncé avoir fait l’acquisition de Sensornet Ltée (Sensornet), entreprise établie à Elstree, Hertfordshire, au Royaume-Uni. Sensornet fournit des systèmes de solutions de surveillance les plus évolués offerts sur le marché, reposant sur des systèmes de surveillance de la température et de la contrainte distribuées en temps réel. « Avec ce nouvel atout au portefolio de Nova Metrix, nous serons désormais en mesure d’accroître notre offre de produits et services dans le domaine de la surveillance, tout en renforçant et en consolidant les technologies déjà existantes que proposent Roctest Ltée et Durham Geo Enterprises inc. », a déclaré Jim Barbookles, président et chef de la direction de Nova Metrix. Toutefois, l’activité reliée aux puits de pétrole et de gaz de Sensornet demeure sous la direction de son ancien propriétaire, Tendeka.

Read the latest Roctest Smartec Telemac Newsletter (Issue 06 2011)