Tension detection technology of belt conveyor based on optical fiber sensor
A tension detection method of belt conveyor based on optical fiber sensing is proposed for the current problems of easy damage,poor accuracy and reliability of belt conveyor tension detection.The method is based on the princi-ple of double interference effect by placing the Fabry Perot cavity sensor in the hydraulic circuit of the belt con-veyor tensioning device,and the pressure of the hydraulic circuit causes deformation of the silicon diaphragm of the Fabry Perot cavity sensor,which causes changes in the reflected light of the Fabry Perot cavity sensor.After the optical demodulator optical circuit receives the reflected light from the Fabry Perot cavity sensing,the re-flected spectrum is obtained after demodulation of the optical circuit,and the free spectral range of the reflected light spectrum is obtained through photoelectric conversion,processing and analysis of the photoelectric demod-ulator circuit,and then the belt conveyor tension is calculated according to the internal area of the cylinder,which realizes the belt conveyor tension detection.A Fabry Perot cavity sensor and an electro-optical demodula-tor are designed,and the software of the electro-optical demodulator is designed using Python language,and ex-perimental studies are conducted.The experimental results show that the method can achieve belt conveyor ten-sion detection with a pressure measurement range of 0-25 MPa,sensitivity of 0.148 nm/MPa,measurement ac-curacy of 0.1％,not easy to damage,good anti-interference,high accuracy and reliability.
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