Urban utility tunnel safety monitoring system and method
A technology of integrated pipe gallery and safety monitoring, applied in neural learning methods, measurement devices, biological neural network models, etc., can solve problems such as poor ventilation, scarce personnel, dim light, etc., to improve the accuracy of safety monitoring and reduce safety. The effect of monitoring costs and improving deployment efficiency
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Embodiment 1
[0034] like figure 1 As shown in the figure, a safety monitoring system for an urban integrated utility corridor includes an ultra-narrow linewidth laser 1, an optical pulse modulator 2, a first circulator 3, a first splitter 4, a balanced light detector 5 and a data acquisition card 6 , the first ports of the ultra-narrow linewidth laser 1, the optical pulse modulator 2 and the first circulator 3 are sequentially connected, and the second port of the first circulator 3 is connected with the optical cable 7; the first branch The third port of the splitter 4, the first splitter 4, the balanced light detector 5 and the data acquisition card 6 are connected in sequence, and the first splitter 4 is also connected with the ultra-narrow linewidth laser 1.
[0035] In the above-described embodiment, it also includes a fiber laser 8, a second circulator 9 and an avalanche photodetector 10, the fiber laser 8 is connected to the third port of the second circulator 9; the avalanche photo...
Embodiment 2
[0043] like figure 2 and image 3 As shown, a method for monitoring the safety of an urban utility tunnel includes the following steps:
[0044] The ultra-narrow linewidth laser 1 sends out the first laser signal to the optical pulse modulator 2 and the first splitter 4 respectively, and the optical pulse modulator 2 modulates the first laser signal into a stable pulsed laser signal and transmits it to the first ring device 3, the third port of the first circulator 3 transmits the stable pulsed laser signal to the optical cable 7;
[0045] The second port of the first circulator 3 receives the back Rayleigh scattered light signal in the optical cable 7, and the back Rayleigh scattered light signal is transmitted to the first splitter through the second port of the first circulator 3 4; the first splitter 4 optically mixes the back Rayleigh scattered light signal and the first laser signal to generate a mixed signal and transmits it to the balanced photodetector 5, and the b...
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