Distributed fiberoptic monitoring systems

  • SMART MONITORING SENSORS

    SMART MONITORING SENSORS

    Providing remote monitoring and control solutions for extended objects

    EQZ provides distributed fiber optic monitoring solutions with high levels of sensitivity and accuracy on existing or newly installed optical fibers. Our solutions are based on usage of the so-called DAS concept. The acronym DAS is disclosed as "distributed acoustic sensing".

    The DAS is the real-time sensing system, and it allows collection of acoustic signal distributed along an optical fibre. Based on the DAS concept with usage of the modern data processing approaches we suggest the practical effective instrument (RELSEN) for monitoring of extended objects like oil and gas pipelines, national borders, railroad tracks etc.

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  • HOW IT WORKS

    HOW IT WORKS

    Short explaination of technology process

    Our approach based on the use of the high vibrosensitivity of the infrared energy stream injected into ordinary optical fiber (buried in the ground near the monitoring object) by means of semiconductor laser of low power. This optical fiber will be called a fiber optic sensor (FOS). Typically FOS length is 40-50 km.

    In the systems of this class, all relevant information is transferred to Processing Center (PC) by the optical fiber, which is not only a sensor (FOS) but at the same time an effective and reliable channel for ordinary data transmission. We will call the systems of this class as optical fiber classifiers of seismic pulses (OXY), which by the principle of operation belong to the multitude of so-called C-OTDR systems. So, the vibrosensitive infrared stream injects into a FOS by means of a coherent semiconductor laser at the wavelength of 1550 nm.

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  • OIL AND GAS INDUSTRY

    OIL AND GAS INDUSTRY

    Asset conditions monitoring threat party intrusion detection

    We develop and implement the complex monitoring solutions for oil and gas companies.

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  • BORDER CONTROL

    BORDER CONTROL

    EQZ RELSEN product provides an invisible fence solution for the border control and monitoring.

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  • CRITICAL SITE SECURITY

    CRITICAL SITE SECURITY

    RELSEN can detect, classify and localize the targeted activities

    RELSEN guarantees the spatial resolution no less than 5 meters in process of the targeted activity detection RELSEN can operatively transfer the targeted activities coordinates to the emergency center

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  • TRANSPORT INDUSTRIES

    TRANSPORT INDUSTRIES

    EQZ provides the practical effective solutions for transport industry

    RELSEN delivers decision-ready data directly into its customers hands, enabling real-time information to monitor and protect rail infrastructure. Day and night all-weather resilience and operation. Safety and security: managing and monitoring authorized and unauthorized movement. One RELSEN unit controls up to 50 km of the railroad.

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About Us

EQZ

Distributed fiberoptic monitoring systems

"EQZ was Incorporated in 2013 and comprised of seasoned professionals with extensive experience in sensoring technology and operational security, systems engineering, product management, project management and customer service, currently 12 employees.

Following a strong demand for a new type of cost-effective and commercially feasible monitoring solutions for extended objects providing a holistic approach to the perimeter security. EQZ developed RELSEN product based on a distributed audio-seismic sensoring (DAS) approach.

Our products and services provides solutions for gas and oil industries, border security, critical infrastructure security, transportation.

EQZ is committed to maintaining its technology leadership position in the industry. This is achieved by substantial investment in Research and Development activities which enable solutions’ adaptation to new communication technologies, applications, standards and regulations"

Work Principle

  • Infrared energy stream

    Infrared energy stream

    Our approach based on the use of the high vibrosensitivity of the infrared energy stream injected into ordinary optical fiber (buried in the ground near the monitoring object) by means of semiconductor laser of low power.

    This optical fiber will be called a fiber optic sensor (FOS). Typically FOS length is 40-50 km. In the systems of this class, all relevant information is transferred to Processing Center (PC) by the optical fiber, which is not only a sensor (FOS) but at the same time an effective and reliable channel for ordinary data transmission.

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  • RELSEN

    RELSEN

    We will call the systems of this class as optical fiber classifiers of seismic pulses (RELSEN), which by the principle of operation belong to the multitude of so-called C-OTDR systems.

    So, the vibrosensitive infrared stream injects into a FOS by means of a coherent semiconductor laser at the wavelength of 1550 nm. The simplified scheme of RELSEN represented on Fig. 1. Thus, the laser probes the FOS with usage of infrared stream. This probing is carried out in the pulsed mode. Pulses have a length of ~ 20-200 ns, with an interval of ~ 50-300 μs. The optical fiber is put into the ground, at the depth of 30-50 cm, at the distance of 5-10 m from the monitoring object and, as a matter of fact, it is an optical fiber sensor.

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  • Speckle images

    Speckle images

    When a pulse is moving along the optical fiber, the Rayleigh elastic backscattering is realized on its natural irregularities (impurities), which due to high coherence of the used laser of 3B class leads to formation of the so-called stable interference structures of chaotic type, otherwise called speckles or speckle images.

    A sequence of speckles is received in the point of emanation using an ordinary welded coupler or a circulator. The central moment of the concept is the phenomenon that any seismic vibration arising on the surface of the optical fiber due to propagation of seismoacoustic waves from the sources of elastic oscillations, changes its local refractive index. Changes of the local refractive index are reflected in the time-and-frequency structure (TFS) of the respective speckle.

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  • Analysis of the sequence

    Analysis of the sequence

    Knowing the pulse duration and the velocity of wave propagation in the optical fiber, it is easy to determine the section where the TFS speckle deviation took place.

    Analysis of the sequence of speckle structures using wavelet conversion apparatuses (the phase of singling out of primary signs of target signals) and Lipschitz classifiers (the phase of classification of target signals) makes it possible not only to reliably detect the target source of seismoacoustic radiation, but also to determine its type and area of occurrence.

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Solutions

Oil and gas industry

Oil and gas industry

Asset management and intrusion detection

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Border security

Border security

Invisible fence for border control and monitoring

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Critical site security

Critical site security

Perimeter control, intrusion detection, location and classification

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Transport industries

Transport industries

Traffic and asset management, safety and security

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Contact Us

Adress
5, rue du Colonel Moll, 75017 Paris

Phone
+33664001773
Email
info@eqz.fr

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