Accurate positioning optical fiber sensing alarm device (optical fiber vibration sensing analyzer) (optical fiber vibration detection analyzer) (optical fiber vibration sensor) (optical fiber vibration detector) adopts Raman scattering, optical time domain (OTDR) reflection and Mach-Zehnder bidirectional reflection technology. It is a system that uses ordinary single-mode communication optical fiber as vibration sensing medium, and analyzes the position and vibration intensity of vibration point in the whole optical path by detecting the weak change of optical signal caused by vibration.
The host itself emits the narrow linewidth light source signal into the optical fiber. Once the optical fiber is touched, vibrated or squeezed by the outside world, the refractive index of the optical fiber at the vibration point will change, so the characteristics of light (light intensity, polarization state, frequency, phase, etc. ) The signals detected by the system receiver will also change accordingly, and the detected signals will be analyzed and processed to judge whether the disturbance meets the conditions for triggering "events", and alarm the vibration events around the optical fiber at the first time. At the same time, according to the echo,
Graphic comparison between normal light path and disturbed light path
The system is widely used in long-distance perimeter, oil pipeline, natural gas pipeline and other pressure pipelines, underground cables, military frontier defense and other protection.
Detection function of vibration optical fiber alarm system
1, perimeter protection
Prevent intruders from crossing, destroying, cutting optical cables and digging walls.
2, pipeline protection to prevent manual excavation, damage, mechanical excavation, piling, agricultural farming.
3, optical cable, cable protection
Anti-theft, excavation, destruction, breakpoint detection, physical precise positioning?
Topology diagram of vibration optical fiber alarm system
Topology diagram of vibration optical fiber alarm system
Nanjing Ye Xiang Science and Technology Development Co., Ltd. has been committed to providing advanced intelligent security solutions, as well as research and development, design, production, sales and brand operation services of early warning and alarm products of Internet of Things security system.
The company is a key high-tech enterprise of the National Torch Plan, a private science and technology enterprise in Jiangsu Province, a credit management standard enterprise in Jiangsu Province, a credit management demonstration enterprise in Nanjing, a three-star digital enterprise in Nanjing, and a "New Fourth Board" listed enterprise (enterprise code: 668509). Companies are all over the country.
GB/t 1900 1-20 16/ISO900 1:20 15、GB/t 2400 1-20 16/ISO 1400 1:20 15、
GB/T45001-2020/ISO 45001:2018 certification, and the products have passed 3C certification and EU CE certification. The company has obtained 37 national patents, software copyright 13 and trademark registration certificate 1 1. 202 1 won the first prize of Jiangsu provincial public security department's research and application of integrated management of Yangtze River waters based on technical defense perception data.