OPTIC TECHNOLOGY

US Seismic Systems, Inc. utilizes All-Optical sensing technology for their state-of-the-art sensing systems. The optical fiber itself is the sensor and it is designed to replace the legacy electronic-based sensor systems that are more costly and less reliable.

The fiber optic sensing technology utilized by US Seismic Systems, Inc. employs Fiber Bragg Gratings embedded into the core of the of fiber. The fiber is then packaged into rugged cables specifically designed for the various operating environments; downhole in an oil well, on the ocean bottom, or buried around the perimeter of a secure facility.

Advantages over competing fiber optic systems:
» Low installation cost
» >100X acoustic sensitivity
» Ability to detect and classify multiple simultaneous events
» Clearly defined detection zones

Applications Across Industries
USSI’s fiber optic sensing systems can be used a across a wide variety of applications. Whether hot or cold, at the ocean bottom or near its surface, deep in a coal mine or buried along a fence, our systems can meet the challenge.

The primary difference in our system across these multiple applications is in the design of the sensing cable to withstand the given environment. Because our electronics can be located miles from the actual sensor cable, typically in an environmentally benign location, its packaging remains relatively unchanged.

temp
temp
scotch egg
temp
temp
temp
temp-thumb
temp-thumb
temp-thumb
temp-thumb
temp-thumb
temp-thumb
Benefits of USSI's optic technology:
» Simplicity: USSI fiber optic sensors are completely passive. There are no discrete components subject to failure, and no moving parts.
   The optical fiber itself is the sensor, as well as providing the telemetry, and built-in signal multiplexing.
» Reliability: Systems are all-optical, there are no in-situ electronics which have been the typical failure point for the traditional electronic
   sensor systems. USSI sensor cables typically will show no measurable degradation over a 20-year life.
» Cost Effective: Despite all of the benefits, our fiber optic sensors can be supplied at a small fraction of the cost of legacy electronic sensors.
» Inherently Safe: USSI’s all optical sensors and telemetry cables produce no sparks, no measurable heat, and the light intensity is
   well below the 150 mw limit established by NIOSH for volatile gas ignition.

optic technology

General Characteristics of Fiber Optic Sensing
A major competitive advantage that fiber optic sensor systems have over existing conventional electronic systems is the complete elimination of electronics at the sensor end. This leads to improved reliability, EMI/RFI immunity, lower cost, and lighter weight.

Unlike traditional electronic detection systems that rely on a distributed network of point sensors, every inch of the USSI fiber optic cable is acoustically sensitive (see Figure at right) ensuring that there are no gaps in coverage, and a single cable can include hundreds of discrete sensor channels, each from a few feet to tens of feet long. This provides a much wider area of coverage with no gaps, at a much lower cost than traditional electronic systems. In addition, since the sensing portion of USSI System is all-optical, there will be no in-situ electronics, which has been the typical failure point for the traditional systems. The sensor portion consists of a uniform diameter, rugged, low cost sensor cable designed to be permanently installed via burial, or inside a cased borehole.

Back to top of page