Ordinary optical cables are communication equipment
Vibrating optical cables are perimeter alarm and anti-theft equipment, perimeter security or fence alarm systems. In optical fiber sensing technology, two types of optical fiber sensors can be used to implement:
The first is to use optical fiber Bragg grating distributed optical fiber sensors; the second is to use optical fiber interference type optical fiber sensors.
In recent years, fiber grating in optical fiber sensing technology is one of the most rapidly developing and widely used optical fiber passive components.
One of the main advantages of fiber Bragg grating sensing is that it facilitates the formation of a distributed sensing system.
One of the most critical technologies for constituting a distributed sensing system is multiplexing technology.
Including wavelength division multiplexing (WDM), time division multiplexing (TDM), space division multiplexing (SDM) and their combined multiplexing technologies. Because its sensitive changing parameter is the wavelength of light.
Therefore, it is not affected by changes in light intensity caused by factors such as light sources and transmission line losses.
Fiber grating has the characteristics of simple production, small size, stable and reliable performance, and easy connection with systems and other optical fiber devices.
If it is used as a sensing component, real-time measurement and distributed measurement can be achieved.
Because fiber Bragg gratings reflect light of specific wavelengths, and their reflection center wavelength changes with changes in physical quantities such as temperature and stress.
Has excellent temperature and strain response characteristics. Therefore, it has very broad application prospects in the field of sensing.
With the wide application of fiber Bragg grating sensing technology in measurement, it provides broad vitality for the research of safety technology prevention systems.
Obviously, the strain and temperature sensing characteristics of fiber Bragg grating can be used to create perimeter security and fence alarm systems, so its research has great practical and social significance.
In addition to the advantages of general optical fiber sensors, fiber Bragg grating sensors have the same advantages.
It also has the following advantages: (1) Stronger anti-interference ability, high reliability and stability. The FBG sensor uses the wavelength of light as the smallest unit of measurement.
It only needs to detect the movement of the grating wavelength in the optical fiber, regardless of the light intensity, and is insensitive to fluctuations in light intensity, so it has higher anti-interference ability than ordinary optical fiber sensors. The FBG sensor is a wavelength-encoded sensor. Fluctuations in light source intensity, random fluctuations caused by fiber micro-bending effects, coupling losses, etc. are not likely to affect the wavelength characteristics of the sensing signal, so the sensing system has high reliability and stability. sex.
(2) Fiber Bragg grating (FBG) sensor with high measurement sensitivity, high resolution, high precision and good repeatability.
What is significantly better than ordinary optical fiber sensors is that its sensing signal is wavelength modulated, so its measurement signal is not affected by factors such as light source fluctuations, fiber bending loss, connection loss, and measurement instrument aging.
So the measurement results have good repeatability.
Vibration optical fiber:
Brand: Sanan Good Detection method: vibration detection
Length of defense zone: adjustable length, recommended length of single defense zone is 50-200 meters
Sensitivity: adjustable
Vibration frequency detection service: 1HZ-100HZ
Vibration acceleration monitoring range: 0.001g-100000g
Work Ambient temperature/humidity: -200C-700C/0-900C Maximum tensile force of vibration optical cable: 1000N
Vibration optical cable anti-aging life: 10 years
Product certification: Passed ISO9000 quality management System Certification
Alarm output type: switch value
Defense zone type: optical cable vibration signal
External communication port: 1 485 signal output, 2 sets of switch values Output
485 bus communication interface: 2-wire half-duplex
485 communication protocol: MODBUS industrial controller network communication protocol
Operating temperature: -20℃- 70℃
Equipment material: metal casing, LED display screen
Equipment size: casing 270×210×50mm. The width of the side strips on both sides is 15mm, and the distance between the wall-mounting holes is 6m