摘要
为实现刨煤机刨刀在作业过程中受力在线检测,克服刨煤机机身上安置电源难的问题,提出一种基于压电振动俘能的自供电受力检测系统。将刨煤机工作过程中的振动能量有效地转换为电能,保证检测装置和无线信号发射装置能够长期正常运行。通过多个周期测试表明,检测系统的自供电性能稳定,能够实现刨刀三向载荷的在线检测;并得到了100 s内三向载荷变化曲线,分析发现刨削阻力(Y向)、煤壁挤压力(X向)和煤壁侧向力(Z向)大小依次降低,且载荷波动性也呈现相同的规律,测试结果与实际工况相近,表明检测系统具有较高的精确度。
In order to realize the on-line detection of the stress during the plough cutter operation process of the coal plough, a difficult problem to set the electric power on the coal plough was overcame and a stress detection system of the self power supply was provided based on a piezoelectric vibration energy harvest device. The vibration energy in the operation process of the coal shearer could be effec- tively converted to the electric power to ensure the detection device and the wireless signal transmission device could be normally operated in a long time. The detections with several periods showed that the self power supply performances of the detection system was stable and could realize the 3D load on-line detection of the plough cutter. The 3D load variation curve within 100 s was obtained. The analysis showed that the ploughing and planing resistances （ Y dimension）, the extrusion force （X dimension） of the coal wall and the lateral force （Z dimension） of the coal wall would be reduced in a size-dependent. The load fluctuation would be in the same law, the test results were closed to the actual performances and the detection system could have the high accuracy.
出处
《煤炭科学技术》
CAS
北大核心
2017年第2期136-140,共5页
Coal Science and Technology
基金
国家自然科学基金资助项目(51504121)
辽宁省高等学校杰出青年学者成长计划资助项目(LJQ2014036)
装备结构分析重点实验室开放基金资助项目(GZ1402)
材料腐蚀与防护四川省重点实验室开放基金资助项目(2014CL18)
关键词
刨煤机
刨刀
受力在线检测
压电俘能
自供电
载荷
coal plough
plough cutter
stress on-line detection
piezoelectric energy harvesting
self power supply
load
