Study on Voice Transmission System of the Optical Fiber for Tube Leakage Monitoring Installment in the Power Station Boile

Abstract:

The tube leakage in the large power station boiler is the main reason for unplanned outage of power units. So how to prevent and control the leakage accident has become an important part of ensuring the safe operation of power grid. Sound spectrum analysis is the most commonly used detection method. At the top of the boiler, the temperature is high, and sometimes the positive pressure produced inside the boiler will make ordinary audio sensors particularly easily damaged. This paper designs a system of high temperature resistance fiber optic audio sensor and acoustic resonator. It can determine the parameter of fiber optic audio sensor, and double the leakage noise signal through the design of acoustic resonators. According to the experimental test results and theory, this system can effectively test leakage signal inside the boiler tube, and provide a new idea for leakage detection.

• Periodical: Advanced Materials Research (Volumes 383-390)
• Pages: 260-266
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.383-390.260
• Online since: November 2011
• Authors: Yuan Zhe Xu, Hong Zhen Chen, Shu Jing Ma, Chang Jun Zhao
• Keywords: Acoustic Resonator, Optical Fiber Sensor (OFS), Tube Leakage in Boiler

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[8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] The sensor output voltage(mV).

[58] 107 298 117.

[73] [56] [61] 109 319 133.

[80] The two membranes spacing (cm).

[19] [20] [21] [22] [23] [24] [25] [26] [27] [28] The sensor output voltage (mV).

[72] [78] [96] 294 136.

[91] [64] [70] 103 302 Table 2 Test data The frequency of leakage signal(kHz) 2. 5 2. 6 2. 7 2. 8 2. 9 3. 0 3. 1 3. 2 3. 3 3. 4 3. 5 The acoustic resonator Sound catheter(mV) 20℃.

[54] [85] 115 158 247 320 229 155.

[96] [71] [52] 60℃.

[25] [30] [54] [87] 114 156 248 319 225 158 100.