Mfumo wa Kengele wa Kuingilia Mzunguko wa Fiber Bragg Grating, Characteristics and Application in Subway-INNO

Pamoja na maendeleo makubwa ya ujenzi wa mijini, ujenzi wa njia ya chini ya ardhi katika miji mbalimbali pia unaendelea kikamilifu. Ulinzi wa maeneo ya uendeshaji wa treni ya chini ya ardhi ni dhamana ya uendeshaji salama wa njia ya chini ya ardhi. Kama mahali maalum na muhimu, bohari za magari ya chini ya ardhi lazima zizuie ipasavyo uvamizi haramu na shughuli mbalimbali za uharibifu. Kwa sasa, mifumo ya kengele ya kuingilia kati ya mzunguko wa kawaida ni pamoja na nyaya za macho za vibration, infrared (microwave) kugundua, ulengaji wa laser, uzio wa elektroniki wa kunde, nyua za mvutano, nk. Katika ghala la gari, ni kawaida kukumbana na masuala kama vile kengele za uwongo na kengele ambazo hazijapokelewa zinazosababishwa na kuingiliwa na nje, ambayo huongeza sana mzigo wa kazi ya matengenezo na usimamizi.

Kwa sasa, teknolojia ya onyo ya kuingilia kati ya mzunguko wa kawaida imegawanywa katika makundi mawili:
1. Hali isiyo na waya
Mbinu zisizo na waya ni pamoja na infrared (microwave) kugundua, ulengaji wa laser, nk; Njia za waya ni pamoja na nyaya za macho za vibration, uzio wa elektroniki wa kunde, nyua za mvutano, nk. Kwa ujumla, njia zisizo na waya zina athari kidogo kwenye mazingira, lakini kuwa na mahitaji fulani kwa ardhi ya eneo, uwezo duni wa kuzuia kuingiliwa, na viwango vya juu vya kengele vya uwongo;

2. Hali ya waya.
Njia ya waya ina aesthetics duni, lakini ina mahitaji ya chini kwa ardhi ya eneo, uwezo mkubwa wa kupambana na kuingiliwa, na kiwango cha chini cha kengele ya uwongo.

Mfumo wa kengele wa pembeni ya kuingilia wa wavu wa nyuzinyuzi ni aina ya kebo ya macho ya mtetemo, ambayo hutumia teknolojia za hali ya juu kama vile laser, kuhisi fiber optic, na mawasiliano ya macho ili kuunda mfumo wa kengele ya kuingilia. Ni mfumo mpya unaozingatia quasi fiber optic iliyosambazwa teknolojia ya kuhisi inayotumika kwa ufuatiliaji na ulinzi wa mzunguko. Inatumia nyuzi za macho kufunika eneo la ulinzi, ambayo ina faida nyingi kama vile kutokuwa na umeme, nguvu ya kupambana na kuingiliwa, kuegemea juu, ulinzi wa umeme, usambazaji rahisi wa kijijini, na nafasi sahihi. Ina matarajio mapana ya maombi.

The fiber optic grating perimeter intrusion alarm system mainly consists of fiber optic grating vibration sensors, nyuzi za maambukizi, fiber optic grating demodulation systems, system analysis and display software platforms, and linkage equipment. Fiber Bragg Grating (FBG) vibration detection fiber optic cable, as the detection front-end for external intrusion behavior, can be deployed arbitrarily in the surrounding area and collect various disturbance signals transmitted directly or indirectly, thus achieving 24-hour online monitoring of various vibration information in the surrounding area; The fiber optic grating signal processor in the backend can demodulate the optical wavelength signal carrying vibration information feedback, and restore the vibration signal in the surrounding area. The system software identifies and judges the characteristics of the vibration signal, sends intrusion alarm signals to vibration information with intrusion behavior characteristics, and accurately locates the intrusion location based on the feedback center wavelength.

The main application characteristics of fiber optic grating perimeter system in subway are as follows:

1. Easy to install. Low requirements for terrain environment, adaptable to different perimeter environments, ufungaji rahisi, and can be completed without the need for very professional technical personnel.

2. Essentially passive, with low maintenance workload. The front-end equipment is a detection optical cable without active equipment, which will not be affected by external electromagnetic fields. There is no need to consider the damage of external electrical components to wind, mvua, high and low temperatures, and ultraviolet radiation, which can greatly reduce maintenance workload and save electricity.

3. The false alarm rate is low. The front end adopts a Bragg grating sensing fiber optic cable, which reflects the corresponding waveform by sensing external vibrations, and distinguishes different alarm forms through the characteristic information of optical signals, rather than intensity signals, thus having better discrimination and improving the accuracy of alarms.

4. Kuegemea juu. Each section of the vibration fiber optic cable belongs to an independent zone. When a section is damaged, the other zones are not affected in any way. When maintaining, only single core fiber optic cables need to be fused and do not need to be recalibrated. There is no need to modify software configuration, so they can be connected and used immediately.