To protect the infrastructure systems against ageing, deterioration, and structural malfunction, Resensys has a cost effective and scalable solution for the real‐time monitoring of important structural state quantities such as strain, cracks, vibration, tilt, inclination, moisture, humidity, etc. Resensys’s solution is based on patent pending Active RF Test (ART) technology, which incorporates novel sensing, ultra energy efficient processing, and wireless communication technologies into a small, wireless, and easy to attach adhesive mount sensor. The system consists of three main components:
- SenSpot™: attached to structure (average 10‐50 per bridge)
- SeniMax™: collects data on site of SenSpot™ and sends to remote server (1 per structure)
- SenScope™: software that analyses data & generates alerts (customisable, can be replaced by a client’s software)
To help assess the stability of so many structurally deficient bridges and other highway bridges so that structural issues are pinpointed and necessary maintenance and repairs can be planned to ensure bridge safety and longevity, Resensys has developed its wireless structural health monitoring solution for existing bridges and bridges under construction that features small, low-cost, easy-to-install wireless sensors that measure a variety of variables affecting the performance of a bridge.
Data collected from the sensors can provide bridge owners with diverse information on bridge structural health such as overstrain, changes in load conditions, deformation, excessive vibration, crack development and growth, and conditions that are conducive to corrosion. Resensys monitoring system is unique in that it is extremely low power. For example, an individual sensor needs only 4 μW to operate.
Resensys’ SenSpot™ sensors are also capable to monitor specific variables that indicate favourable conditions for corrosion of reinforcing steel in concrete, moisture, electrochemical activity, and chloride concentration. These sensors possess a small probe that is inserted into the concrete at a depth that enables close proximity to the reinforcing steel. The type of probe used on the sensor corresponds with the conditions being monitored in the concrete (i.e., the amount of moisture, the concentration of chloride ions, or the presence of an electrochemical current between the steel and the concrete).
Structural Health Monitoring
We offer a cost-effective, easy-to-install, wireless sensor system for structural health monitoring. Our solution can be used for maintenance-free long-term monitoring (several years, decades) or short-term monitoring with our small wireless devices known as SenSepot sensors. The flexibility of our wireless solutions allows us to extend the range of our applications and even customise the sensors to the clients’ need.
Our structural health monitoring solution consists of a variety of SenSpot sensors from strain, tilt, vibration, fatigue, corrosion, displacement, humidity and temperature sensors all provided in our wireless SenSepot sensor. We provide a real-time data at the comfort of the office or any location desired. There are several unique features which distinguish our sensors from other products. For example, our precision tilt sensor provides a highly accurate measurement such that it detects tilting as small as 0.001 degrees (3 arc sec), which can be used to monitor settling, or tiny movements, etc. Analysing and remote access of collected data from our SenSpot sensors allows our customers to get alerts if certain thresholds are exceeded. As another example, our humidity and temperature sensors provide information-rich localised data-set which helps predict building zones or locations prone to growing mould. The flexible design of the sensor with a variable length sensing probe in such sensors provides the flexibility of measuring humidity and temperature in hard to access places of a building (e.g., behind drywalls, conduits, attics, etc.).