Infrastructure / Structural Health Monitoring

How We Can Help You

Campbell Scientific data-acquisition systems' versatile capabilities make them ideal for structural health monitoring. Our data logger applications range from simple beam-fatigue analysis to structural mechanics research to continuous monitoring of large, complex structures. Campbell systems provide remote, unattended, portable monitoring for highway overpasses, roads, buildings, retaining walls, bridges, and amusement park rides. They make reliable structural measurements, even in harsh environments.

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To see how our systems meet your application needs, review our case studies »


Customize a System

Most of the systems we sell are customized. Tell us what you need and we'll help you configure a system that meets your exact needs.


Instrumentation

We offer a variety of products that can be used to create systems for Structural Health Monitoring. Many of the major components used to create these systems are listed below. Please let us know if we can help you configure a system.


More Details about Our Structural Health Monitoring Systems

Data loggers used in Structural Monitoring and Control

The versatility of our data logger systems allows them to be customized for each application. We offer a range of data loggers from the most basic system with just a few channels, to expandable data logger systems that measure hundreds of channels. Scan rates can be programmed from a few hours to 100,000 times per second, depending on the data logger model. Measurement types, recording intervals, and processing algorithms are also programmable. Data loggers not only provide advanced measurement capabilities, but can also control external devices.

On-board processing instruction sets contain programmed algorithms that process measurements and output results in the desired units of measure. For example, data can be displayed as rainflow or level crossing histograms. These rainflow and level crossing algorithms allow processing for extended periods of time, not just a limited number of cycles. The instruction sets also allow for triggered output with pretrigger data capture capability. Triggers can be based on sensor output, time, and/or user control. For example, if an overpass is being monitored, data collection can be triggered by a sensor detecting the approach of a car, an earthquake, pre-programmed times, or by pushing a button.

The control functions of our data loggers combined with their programmability allow them to sound alarms, actuate electrical devices, or shut down equipment based on time or measured conditions. Systems can also call out to phones, pagers, radios, and other devices to report site conditions. Voice-synthesized modems are available, so the system can actually call and tell you what is happening.

Sensors used in Structural Monitoring

Because our data loggers are compatible with nearly every commercially available sensor, you can use the sensors that best meet your application. Typical sensors used for structural and seismic monitoring by our systems include:

  1. Carlson strain meters
  2. vibrating-wire strain gauges
  3. foil strain gauges (set up in quarter, half, or full bridge strain configurations)
  4. inclinometers
  5. crack and joint sensors
  6. tilt sensors
  7. piezoresistive accelerometers
  8. piezoelectric accelerometers
  9. capacitive accelerometers
  10. borehole accelerometers
  11. servo force balance accelerometers

Because our data loggers have many channel types and programmable inputs, all these sensor types can be measured by one data logger. Channel types include analog (single-ended and differential), pulse counters, switched excitation, continuous analog output, digital I/O, and anti-aliasing filter. Using switched or continuous excitation channels, our data loggers provide excitation for ratiometric bridge measurements.

Our configurable data logger models, the CR9000X and CR9000XC, allow you to customize a system with the channel types that best fit your application. The number and type of channels on most of our data loggers are expandable using multiplexers and other measurement peripherals. Our data loggers have input resolutions to 0.33 microvolts, allowing strain measurements with a resolution of a single micro-strain.

Communications

The availability of multiple communications options for retrieving, storing, and displaying data also allows systems to be customized to meet exact needs. On-site communication options include direct connection to a PC or laptop, PC cards, storage modules, and data logger keyboard/display. Telecommunication options include short-haul, telephone (including voice-synthesized and cellular), radio frequency, multidrop, and satellite.

Software

Our Windows-based software simplifies data logger programming, data retrieval, and report generation. The data logger program can be modified at any time to accommodate different sensor configurations or new data processing requirements.

Example Application: Monitoring an Overpass

Campbell Scientific's monitoring systems are used for a variety of structural and seismic applications. Monitoring possibilities on an overpass include:monitoring an overpass

Case Studies

Kentucky: Wolf Creek Dam Repair
The Wolf Creek Dam near Jamestown, Kentucky, was constructed partially as a regular concrete hydroelectric......read more
Canada, Confederation Bridge: Structural Monitoring
The Confederation Bridge is one of the world's longest continuous pre-stressed-concrete, box-girder, bridges built over......read more
Medway Bridge: Monitoring Deck Movement
Ten Campbell Scientific CR10X dataloggers were used to monitor movement during the repair of the......read more
Castillo de San Marcos: Crack Monitoring
The Castillo de San Marcos National Monument, St. Augustine, Florida, is a 17th Century historic,......read more
Menai Bridge: Load Monitoring
Following an inspection a decade ago, the Welsh Office was advised to reduce the allowable......read more
Space Research: Joint Damping Experiment
The Space Shuttle Endeavor carried the CR10 and CR9000 data loggers into orbit as part......read more
Northampton: Concrete Performance Research
In an effort to study the performance of concrete floors in large warehouses and distribution......read more

Frequently Asked Questions

Number of FAQs related to Structural Health Monitoring: 1

  1. Most Campbell Scientific systems are built from individual components. This provides maximum flexibility for our customers, but it does not lend itself to pricing a "typical" system. Contact Campbell Scientific for assistance in pricing a system to meet the unique needs of the application.

Related Integrators

The following is a list of companies that have developed expertise in our products and provide consulting, installation, and other services for structural health monitoring applications.


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