Navionics Research offers a broad range of in-house experience in telemetry system design,
integration, installation, and commissioning. Leveraging the most advanced
non-proprietary computer hardware platforms available, and supported by complete
documentation, we can provide an easy-to-use turnkey telemetry and control solution
to your rural water or wastewater district.
One of the most prevalent telemetry strategies in the water and wastewater industries is the "Master-Slave" scheme.
In a "Master-Slave" network, all remote RTU's report their status to a central computer
or PLC, which then returns the control
commands. However, if the central computer/PLC is down for any reason (e.g. power outage or repairs), the entire control
network stops functioning. This can be catastrophic for rural water or wastewater districts which are often spread out
over hundreds or even thousands of square miles.
Navionics Research has been committed, from the beginning, to a rejection of "Master-Slave" schemes in favor of providing fault-tolerant "Peer-To-Peer" telemetry and control systems. In a "Peer-to-Peer" network, all RTU's operate in a smart, stand-alone mode at all times.
Just ask Raccoon Water Company of Centralia, IL. When a tornado ripped through their main office in April of 1998, their C3 SCADA computer was without power for 3 days. However, while they were busy rebuilding the office, their remote water towers and pump stations, which did have power, continued to operate as normal - keeping all customers supplied with water. In the face of a natural disaster, their SCADA system was one thing they didn't have to worry about. After all, the measure of a fault-tolerant system is how well it operates under less-than-ideal conditions.
You'll begin to receive the payoff benefits of your new Navionics WiSTAR wireless telemetry and control
system beginning with the first day of operation. Our customers report a drastic reduction in the amount
of mileage spent monitoring their remote sites. And when there is a problem, such as a sump pump failure
in an underground pump station, the telemetry alerts the utility personnel immediately - before the problem escalates.
With centralized and automated history charting on the C3 SCADA operator interface, our customers invariably gain new insights into the hydraulic dynamics of their system. Finally, because we use the most dependable wireless data communication equipment and algorithms available, our customers experience a much greater reliability than leased-line and cellular-based telemetry systems - and without the recurring charges.
Navionics is committed to providing wireless telemetry and control solutions in a non-proprietary,
open format. The computer platform which we have selected is perhaps the most widely-accepted electronic
standard in history - the IBM PC architecture. Leveraging the expandable computing and I/O power
inherent in the PC architecture, the Navionics WiSTAR system represents the cutting edge of programmable
industrial control. And Navionics' philosophy of providing full product documentation and manuals, in support
of non-proprietary hardware, assures the customer of a system which is maintainable for many, many years.
The Navionics WiSTAR RTU is an expandable, field-programmable industrial controller.
Because the WiSTAR RTU is "software-intensive", the overall control system complexity is vastly
reduced - featuring far fewer auxiliary devices along with simplified installation and wiring
procedures. And as your control requirements evolve over time, additional analog, digital,
pulse, and Modbus inputs and outputs can be easily added, along with the programming logic needed to control
them. In many cases, logic upgrades can be sent via UPS or Fedex from our facility to yours.
Because each RTU has a single processor, the control and wireless communication processes are very tightly integrated. For example, at Jersey County (IL) Rural Water Company, the Grafton booster pump station bases its pump control decisions upon the water level in the remote Grafton Elevated Tank. However, when an extended power outage at the tank exceeded its battery backup reserve in June of 1999, the pump station had to "fly blind" for approximately 8 hours. Because the control process was always "aware" of the communication status, the pump station was able to automatically fail over smoothly into a "local pressure" control strategy - and thereby maintain water storage in the system.
The Navionics WiSTAR RTU was designed for wireless communications. Difficult
terrain is easily overcome with built-in repeating capability - and the adaptive re-routing
algorithm can alter communications paths on-the-fly to compensate for a missing repeater. Channel
usage is kept to a minimum by a judicious combination of "polling" and "report-by-exception".
And by leveraging the most modern error-detection communication technology available, data errors and
interference problems are completely eliminated.
With the "WiSTAR-2011" C3 (Communications, Command, & Control) Graphical
User Interface (GUI), Navionics is an
established regional leader in the wireless telemetry and control interface arena. And thanks to the many customer
suggestions over the years, WiSTAR-2011 offers a wealth of operator-oriented features.
For example, even though the C3 GUI has full remote-control and setpoint modification capabilities, it is not a "Master-Slave" design. Navionics has always maintained the integrity of its "Peer-to-Peer" strategy. And changing or adding an "RTU site" is a snap - no software rebuilds are required.
Another unique feature is the C3 GUI's ability to automatically archive history data on-the-fly. The end-result is that the C3 computer is able to hold up to 200 years of history data, as opposed to many competitive systems which can only hold 30-60 days of history. And being able to view history charts has proven to be such a useful feature that Navionics provides its remote access client software free-of-charge to all of our customers so that they can share performance data with their consulting engineers.
When something goes wrong in the field, the C3 GUI alerts the operator with an audible alarm, as well as a flashing graphic. If the operator is away from the computer, then the C3 GUI sends a descriptive message to his cell phone - detailing the exact location and nature of the problem.
Another revolutionary component of the WiSTAR-2011 system is the "Portable C3 GUI", a notebook-based graphical operator interface. Navionics implementation is both powerful and unique. For example, when it is staged in the operator's vehicle, WiSTAR2011 automatically detects the vehicle's location and modifies the communication relay paths accordingly. In this manner, the operator is able to maintain a continuous telemetry data link to all RTU sites while working in the field. Also, the operation is completely hands-free, and it even works while the vehicle is in motion.
Before a project is started, the exact coordinates of the future telemetry sites are obtained from
either a GPS survey or from the customer's engineering data. Then, the proper selection of radio
frequency band, transmitter power levels, antenna heights, antenna gains, and antenna boresight angles
is achieved through a pre-job computer radio simulation.
This simulation, which takes into account a terrain model imported from the digitized US Geological Survey database, ensures that any obstructions are located and overcome early in the design phase of the project. Since we do the homework up front, our telemetry systems provide solid inter-site communications "right out of the box".
As an addition to our more comprehensive SCADA system offerings, we are proud to introduce the low-cost and high-quality TeleTransducer™ System!
How can both high-quality and low-cost be achieved simultaneously? –
By utilizing select components that are recognized throughout the industry as top-of-the-line,
while achieving low-cost through the simplicity of an astonishingly low parts count.
Brochure (Click Here For Details)