Abstract
A method based on phase sensitive optical time domain reflectometer (ϕ-OTDR) distributed optical fiber micro-vibration sensor, is proposed to detect and locate the broken fabric bags in a baghouse filtration system. The mechanism is by detecting the laser intensity change in a standard optical fiber cable hang in the filter bag, and which is the result of the dynamic airflow’s perturbation in the baghouse. While the location of broken bags is realized by optical time domain reflector method. Field trial in Hefei cement industry platform is conducted and test results show that the minimum detectable hole size is 1cm2. The method provides an alternative way for environmental dust emission monitoring and pre-warning in cement industry. Other application niches such as power plant, coalmine industry could also benefit from this new monitoring technology.
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