Laser triangulation measurement of the level in a coal silo

Laser triangulation theory was used to develop a novel contact-free method for measuring the coal level in a silo under harsh environmental conditions found in coal mines, such as the presence of dense dust, high humidity, and low illumination. A laser source and a camera were mounted at the top of the silo. The laser spot projected into the silo was imaged by the camera. The pinhole imaging principle allows the level to be found from the lateral shift of the spot image on the sensor. A pre-calibrated look-up table of the coal depth versus spot position was used to obtain the depth. The measurement accuracy depends on the step size used during pre-calibration. The actual application of a device designed according to these principles shows that it is easy to implement. The detection of the coal level in a silo at the low illumination level found in coal mines is demonstrated.

煤仓料位智能雷达监测分析系统

煤矿智能化开采中,煤仓煤位的自动化监测十分重要,可以极大地提高生产计划及调度的效率,本方案通过使用雷达料位计、数据分站、DTU数据模块、监测系统软件,实现了对原煤筒仓煤位的实时动态监测。

基于深度预标定的煤仓煤位激光监测方法

针对煤矿井下高粉尘、高湿度、低照度的恶劣成像环境,提出一种非接触式激光三角测距煤仓煤位的测量方法。该方法预置一激光光源照射煤面,在煤仓主轴顶部架设相机拍摄光源光斑,依据针孔成像模型,通过计算光斑成像点的横向偏移量,查询预先实测标定的对应不同偏移量的煤仓煤位深度表,最终实现煤仓煤位深度测量的目的,测量的精度取决于标定步长的选择。依据该原理设计了测量装置,现场使用表明,该方法易于实施,可以在煤矿井下低照度的成像环境中实现煤仓煤位检测。

ZL型智能料位计研制

ZL型智能料位计采用精确可靠的数字检测技术、计算机控制技术和完善的抗干扰技术 ,对传统的机电式料位计进行全面的技术改造 ,基本解决了机电式料位计可靠性差、误差大及难以密封问题。经几年的试运行 ,质量性能稳定 ,适合于各种粉状和颗粒状物料料位的测量。