Manufacturer of Distributed Fiber Optic Vibration Sensing System (DVS) products-INNO

Penciptaan gentian optik mempunyai sejarah hampir satu abad. Peringkat awal gentian optik mengalami kerugian yang besar, yang mengehadkan penggunaannya. Pada tahun 1960-an, di bawah promosi Gao Kun dan lain-lain, Corning Corporation di Amerika Syarikat pertama kali mengeluarkan gentian optik dengan kerugian serendah 20 dB/km, menjadikan penghantaran isyarat optik jarak jauh mungkin, menggalakkan kepraktisan komunikasi gentian optik dan pembangunan industri berkaitan. Perkembangan komunikasi gentian optik juga sangat menggalakkan pembangunan perisian dan perkakasan, termasuk pelbagai peranti optik dan algoritma demodulasi. On this basis, didapati bahawa menggunakan perubahan dalam isyarat optik boleh digunakan untuk mengesan pelbagai parameter fizikal (seperti suhu, medan magnet, halaju sudut, dll.). Ciri isyarat optik biasa termasuk keamatan cahaya, kekerapan, fasa, keadaan polarisasi, dll. Compared with other types of sensors, optical fiber sensors have a series of advantages. Kelebihan, including size, berat badan, tolerance to harsh environments, dll, Oleh itu, it has been widely applied and has become a huge emerging industry.

The gentian optik teragih vibration sensing system (DVS) is based on the optical time-domain reflection (OTDR) technology with phase information, using G652 single-mode fiber as the sensing medium. The laser emits a narrow linewidth pulse laser that is transmitted along the sensing fiber, while continuously generating backward Rayleigh scattered light, which undergoes multi beam interference. When the sensing fiber is subjected to external vibration interference, the phase of the backscattered Rayleigh light will change, causing a change in the intensity distribution of multi beam interference. The photoelectric conversion device detects changes in the intensity distribution of these interference lights and demodulates them into vibration signals. This is why DVS can detect external vibrations.

Ciri-ciri distributed fiber optic DVS vibration monitoring system:

The monitoring distance of a single host can reach 20-40 kilometer;

Positioning accuracy up to ± 10 meter;

Can distinguish non-human invasion situations such as wind and rain, and reduce false alarms;

Polarization control module ensures precise and stable operation of the system;

Intelligent analysis module filters out false alarms;

No power supply is required in the defense area;

The entire defense zone is passive, kalis letupan, resistant to lightning strikes, gangguan elektromagnet, does not produce sparks, and has a long service life;

Fiber optic is inherently safe and can be used in high-risk environments;

Support multi machine parallel connection and expand monitoring range;

Multiple alarm methods and remote maintenance management;

Can be used in conjunction with electronic maps for precise positioning;

The system is easy to construct and has low maintenance costs;