Fiber Optic Distributed Vibration Sensing
(DVS) for Security and Safety Applications


Fiber Optic Distributed Vibration Sensing (DVS) systems are critically important technologies for the security and safety of large areas. These systems leverage the sensitivity of fiber optic cables over long distances to detect even the slightest vibrations. Thanks to these capabilities, they have a wide range of applications, from border security and critical infrastructure protection to traffic monitoring and structural health monitoring.

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SECSENS has a unique Distributed Vibration Sensor (DVS) system that is practical and effective in the prevention of oil or gas spills due to its unique ability to detect, locate and classify vibrations caused by physical activity (such as third-party interference), while simultaneously monitoring for early-stage leaks, along the entire length of the pipeline, in real-time. In comparison with other competing technologies, SECSENS is distinguished by the following main operational capabilities:

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Revolutionary DVS Detection: Early Detection, High Precision, and Unmatched Performance

It operates over an extremely broad frequency range (3Hz to 500kHz) and is the world’s first and only distributed ultrasonic detector. As a result, it can detect and locate earlystage leaks, directly and much earlier than other cable-based systems

It offers completely uniform sensitivity and performance over the entire length of the optical fiber cable. Most other systems are non-uniform and their performance diminishes with distance.

It is effective at discriminating different patterns of interferences and environmental/ traffic noises from potentially dangerous operational events/threats. By reducing nuisance alarms, it alarms for events of true concern with an increased degree of confidence and thus allows for automatic response mechanisms with a practical degree of responsibility.

Alarm Processing Unit (APU)

  • Dimensions: 5.25” x 16.5” x 22” Weight: 12kg
  • Power requirements: 80-100 W
  • Number of chaannels: 1
  • Maximum monitoring range: 50 km with 11db maximum optical loss
  • Detection is realized within a very broad frequency bandwidth from quasi-DC to 500KHz including those of leaks and all possible TPI events
  • Hardware platform: dedicated reprogrammable FPGA and DSP chips
  • Programming input: firmware upgrading via TCP/IP
  • Real-time self-calibration of optical system keeps system in optimum operating condition
  • Operating temperature range of 0-50°C – no air-conditioned rack is required

Fiber Optic Cable

  • Type of sensor cable: single-mode, providing seven different levels of actual physical sensitivity of the cable in order to optimize system performance for different ground and environmental conditions
  • More sensitive than traditional cable, permitting use of protective jackets and conduits without affecting required sensitivity
  • Robust design includes protection against insects and rodents
  • Sensing cable length per APU: MIN 500 m, MAX 50 km
  • Maximum passive lead-in length per APU: unlimited to maximum range
  • Maximum number of zones: unlimited, software adjustable
  • Flexible unlimited zonal configuration, permitting flexibility in sensitivity for every zone
  • Smaller diameter of cable and robust protective jackets permit additional installation flexibility and convenience

The key advantages of the SECSENS system are:

  • Double sensitivity over all other currently available fiber optic transmissive interferometers.
  • Extra sensitivity allows cable to be installed in conduit with minimal impact on performance.
  • 500 kHz bandwidth, an unprecedented wide frequency bandwidth, which covers the low
    range associated with TPI events and the very high range (ultrasonics) associated with early
    leak detection (nearest competitor has 20kHz).
  • Seven configurable (physical) levels of sensitivity at any point along the same cable in order
    to optimize its performance in different field conditions.
  • Dedicated, integrated hardware using FPGA and DSP microprocessors (i.e., faster, more
    reliable, more robust, lower power consumption) – not based on commercial computers, no
    cooling required.
  • Advanced processing software operates automatically for minimizing nuisance alarms.
  • Ultra-high speed data acquisition and real-time automated processing simplifies operation,
    significantly reduces amount of data produced (KB/MB vs GB/TB) and enables more events
    to be simultaneously processed – reducing computing power and post-processing
  • Extra fibers in the cable can be used for variety of extra singlemode fiber functions, such as
    telecommunications, SCADA, CCTC transmission, PIDS integration, etc.
  • Significantly lower cost, aim to be at least 30% less than the nearest similar competitive

Fiber Optic Distributed Vibration Sensing (DVS) Wall Installation

Fiber Optic Distributed Vibration Sensing (DVS) Wall Installation is a security and monitoring system that integrates into the walls or surroundings of structures using fiber optic cable technology. This system takes advantage of the sensitivity of fiber optic cables to detect vibrations coming from cables that are mounted on or placed along walls. These vibrations can be caused by the movement of people, vehicles, or other objects, and DVS technology analyzes these vibrations to identify events occurring in a specific area.



Fiber Optic Distributed Vibration Sensing (DVS) technology offers groundbreaking features for security and safety applications. These systems detect vibrations across a wide area through sensitive fiber optic cables, enabling the early detection of various threats and conditions. Here are some key features of this technology:

High Sensitivity and Broad Detection Range

DVS systems can detect very low-level vibrations and operate over a wide frequency range. This allows the systems to identify a diverse array of events – from human movements to vehicle traffic and even structural damages.

Long-Distance Monitoring

Fiber optic cables can extend for kilometers, providing uniform detection across their entire length. This enables the monitoring of vast areas from a single point.

Early Threat Detection

DVS technology can identify potential security threats or structural issues at a very early stage, allowing for timely intervention.

Discrimination of Environmental and Operational Noise

The system can distinguish events that could be dangerous from environmental or traffic noises. This helps reduce false alarms and focus on real threats.

Low Maintenance Requirement

Fiber optic cables are durable and require minimal maintenance for long-term use, which reduces operational costs.

Versatility and Flexibility

DVS systems can be used in a variety of applications, including border security, infrastructure protection, traffic management, and structural health monitoring.

Real-Time Data Processing and Analysis

The system can process and analyze collected data in real-time, providing the capability for swift response and decision-making.

Ease of Integration

DVS systems can be easily integrated with existing security and monitoring infrastructures, thereby strengthening the overall security posture.

Application Areas

Fiber Optic Distributed Vibration Sensing (DVS) technology has a wide range of applications in security and safety. Thanks to its sensitive detection capability, it has become a valuable tool across many different sectors and for a variety of applications. Here are some key application areas of DVS technology:


Fiber optic cables extending along borders can detect illegal crossings, infiltration attempts, and border violations.


Fiber Optic Distributed Vibration Sensing (DVS) technology is an ideal solution for Pipeline Monitoring and Security applications, improving pipeline safety and maintenance by sensitively responding to environmental changes.


It can detect the early signs of forest fires by monitoring soil movements and other signals in forested areas.


It can be used to enhance security and operational efficiency in areas such as large energy storage facilities and battery parks.


Can be used to enhance the security around critical facilities like airports and ports. It can detect unauthorized entries and dangerous activities in these areas.


It can play a significant role in smart city applications such as city security, traffic management, and infrastructure health monitoring.

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It can be used to monitor ground movements and seismic activities, providing valuable data for earthquake research and early warning systems.


It can be used along water infrastructure to detect floods, leaks, and other water management issues.


It can be used to ensure the safety of underwater and surface structures, such as bridge piers and docks.


It can be used to monitor slope stability, landslides, and other ground movements.