基于光纤传感的带式输送机张力检测技术  

Tension detection technology of belt conveyor based on optical fiber sensor

作　　者：苗长云[1] 张豫飞 MIAO Changyun;ZHANG Yufei(School of Electronics and Information Engineering,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学电子与信息工程学院,天津300387

出　　处：《天津工业大学学报》2024年第4期67-74,共8页Journal of Tiangong University

基　　金：国家自然科学基金面上项目(NSFC51274150);天津市重点研发计划科技支撑项目(18YFZCGX00930)。

摘　　要：针对目前带式输送机张力检测存在易损坏及准确性和可靠性差的问题,提出了一种基于光纤传感的带式输送机的张力检测方法。将法珀腔传感头置于带式输送机张紧装置的液压回路中,液压回路的压力使法珀腔传感头的硅膜片产生形变,引起法珀腔传感头反射光变化;光电解调器光路接收法珀腔传感头的反射光后,经光路解调后得到反射光谱,通过光电解调器电路的光电转换、处理、分析后,得到反射光光谱的自由光谱范围,再根据油缸内部面积计算出带式输送机张力,实现了带式输送机张力检测。根据双干涉效应原理设计了法珀腔传感头,采用Jetson Nano嵌入式系统开发板设计了光电解调器硬件,采用Python语言设计了光电解调器软件,并进行了实验研究。实验结果表明:该方法能够实现带式输送机张力检测,压力测量范围为0~25 MPa,灵敏度为0.148 nm/MPa,测量精度为0.1%,不易损坏,抗干扰性好,准确性和可靠性高。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 principle of double interference effect by placing the Fabry Perot cavity sensor in the hydraulic circuit of the belt conveyor 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 reflected 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 demodulator 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 demodulator are designed,and the software of the electro-optical demodulator is designed using Python language,and experimental studies are conducted.The experimental results show that the method can achieve belt conveyor tension detection with a pressure measurement range of 0-25 MPa,sensitivity of 0.148 nm/MPa,measurement accuracy of 0.1%,not easy to damage,good anti-interference,high accuracy and reliability.

关 键 词：光纤传感器 带式输送机 张力检测 张紧油缸 法珀腔传感头 光电解调器 

分 类 号：TD76[矿业工程—矿井通风与安全] TP212.44[自动化与计算机技术—检测技术与自动化装置]