The distributed optical fiber vibration measurement system uses optical cable as the sensor, which can be buried in the ground along the perimeter of the prevention area, bundled on the guardrail or implanted in the wall. When the event occurs, the vibration or pressure generated can be detected by the optical cable and the external intrusion signal is transmitted to the signal processing center, and finally the control center issues the corresponding alarm and gives the specific intrusion location. The system has high sensitivity, because of the embedded intelligent judgment system, it can identify and classify the intrusion behavior intelligently, and has a high alarm rate and a very low false alarm rate. Commonly used in: airports, warehouses, military restricted areas, border lines, railway lines, power stations and military facilities.
System block diagram
Field installation drawing
A fiber optic perimeter security system can be designed to detect abnormal vibration or pressure generated by activities such as climbing, cutting, digging, crossing, or otherwise disturbing a protected perimeter.
The sensing cable continuously monitors vibration along the protected boundary. When an event produces a signal that matches the configured detection criteria, the system analyzes the event, generates an alarm, and provides location information.
The specific events that can be detected depend on the installation method, perimeter structure, surrounding environment, and system configuration.
In this system, the optical fiber is not used only for communication. It also acts as a continuous vibration sensor.
When an intruder climbs or disturbs a fence, walks across a protected underground detection zone, or creates vibration near the sensing cable, the mechanical disturbance affects the optical signal inside the fiber.
The distributed fiber optic vibration monitoring system detects these changes, analyzes the signal characteristics, and determines whether the event meets the configured alarm criteria.
Yes. One of the main advantages of distributed fiber optic sensing is that an abnormal vibration event can be associated with its position along the sensing cable.
When a suspected intrusion is detected, the system can provide location information for the affected perimeter section.
This helps security personnel identify where an event is occurring and respond to the relevant area instead of searching the entire perimeter.
Actual localization performance depends on the equipment, sensing cable installation, system configuration, signal conditions, and project requirements.
Yes, when the sensing cable is properly installed on the fence and the intrusion activity produces sufficient vibration to be detected.
Climbing, cutting, striking, or otherwise disturbing a fence can generate characteristic vibration signals that are transmitted through the fence structure to the sensing cable.
The monitoring system analyzes these signals and can generate an alarm when they match the configured intrusion criteria.
Detection performance depends on the fence structure, cable installation, environmental conditions, and system commissioning.
Yes. A sensing cable can be buried underground along the protected perimeter when a fence-mounted installation is not suitable.
In a buried configuration, the system detects vibration or pressure changes transmitted through the ground when a person, vehicle, digging activity, or other target disturbs the protected area.
The burial depth, cable position, soil conditions, required detection zone, and target events should be considered during system design.
Yes. Depending on the wall structure and project requirements, the sensing cable can be incorporated into or installed along a wall to detect vibration caused by intrusion or physical disturbance.
The installation method should be designed according to the wall material, construction, required sensitivity, accessibility, and the types of intrusion events that need to be detected.
For new construction, the sensing cable can also be considered during the perimeter infrastructure design stage.
In many cases, yes.
For an existing fence, engineers can evaluate the fence type, structural condition, total perimeter length, mounting locations, gates, corners, nearby roads, environmental vibration, and existing security infrastructure.
If the fence can effectively transfer intrusion-generated vibration to the sensing cable, a fiber optic perimeter detection system can often be added without replacing the entire perimeter structure.
A site assessment is recommended before determining the final cable installation and detection configuration.
Environmental conditions can generate vibration on fences and other perimeter structures, so false alarm control is an important part of system design and commissioning.
The system does not need to treat every vibration as an intrusion. Signal characteristics can be analyzed and detection parameters adjusted according to the normal environmental conditions at the site.
Fence type, wind exposure, vegetation, rainfall, nearby machinery, and other environmental factors should be considered when configuring the detection and alarm strategy.
Vehicles, trains, industrial machinery, and construction activity can generate ground or structural vibration that may reach the sensing cable.
For sites with significant background vibration, the system should be commissioned using actual site data so that normal environmental patterns can be distinguished from target intrusion events as effectively as possible.
Different perimeter zones may also require different detection parameters depending on their surrounding environment.
Different events may produce different signal characteristics, including vibration intensity, frequency content, duration, repetition, and spatial pattern.
The distributed fiber optic vibration system continuously acquires signals along the perimeter and uses signal processing and event classification methods to evaluate detected activity.
During commissioning, detection parameters can be optimized for the specific site and the types of events that need to be identified.
This is particularly important for reducing unnecessary alarms caused by wind, traffic, machinery, animals, or other normal environmental activity.
Yes. The fiber optic perimeter system is designed for continuous monitoring and does not depend on daylight or human observation to detect vibration events.
This makes it suitable for continuous perimeter protection at facilities that require security monitoring 24 hours a day.
When a qualifying event is detected, the system can automatically generate an alarm and provide the corresponding location information for security personnel.
Fiber optic intrusion detection and video surveillance perform different functions and can complement each other.
Cameras are valuable for viewing, recording, and verifying activity. A fiber optic perimeter system is designed to actively detect physical intrusion or disturbance along the protected boundary.
A combined system can therefore use fiber sensing to detect and locate a suspicious event and video surveillance to help security personnel visually verify what is happening at that location.
This can be particularly useful for long perimeters where continuously watching every camera is impractical.
Yes. Integration can be designed according to the existing video surveillance platform, alarm system, communication architecture, and interface requirements.
When the fiber optic system detects an intrusion and determines its location, the alarm information can be provided to the security platform.
Depending on the system architecture, this information can be used to help operators identify or display cameras covering the corresponding perimeter zone.
This creates a workflow such as:
Intrusion Detection → Location → Alarm → Video Verification → Security Response
Distributed fiber optic sensing is particularly suitable for long perimeter applications, but the actual monitoring distance depends on the sensing equipment, optical cable, system configuration, required localization performance, environmental conditions, and project design.
For airports, railways, power facilities, borders, industrial sites, and other large perimeters, the complete system can be divided into appropriate monitoring zones according to site layout and security requirements.
The system should therefore be designed around both perimeter length and required detection performance rather than distance alone.
Fiber optic perimeter security is particularly suitable for sites with long boundaries, high security requirements, large outdoor areas, or a need for continuous intrusion detection and location.
Typical applications include airports, warehouses, railway corridors, power stations, restricted areas, border protection, industrial facilities, and other critical infrastructure.
The appropriate installation method depends on whether the site uses fencing, walls, open ground, or a combination of different perimeter structures.
A preliminary design normally requires information about the total perimeter length, fence or wall type, site layout, gates and access points, terrain, surrounding roads, nearby machinery, vegetation, environmental conditions, and the types of intrusion that need to be detected.
It is also useful to understand the existing CCTV system, security platform, alarm system, communication network, and any integration requirements.
Based on this information, engineers can determine the sensing cable installation method, monitoring zones, system configuration, detection parameters, alarm strategy, and integration architecture.
Sales line：4008-555-919
Contact address：Room 302, Floor 3, Building No. 3, No. 38 Courtyard, Linfeng'er Road, Haidian District, Beijing
E-mail：market@dsc.net.cn Contact phone number： 010-82403194 Mobile phone number：15201662379
