一种电子雷管总线电流采集方法  

A Method for Collecting Bus Current of Electronic Detonators

作　　者：唐全明 刘元元 李霞 钟毅 李颖 TANG Quan-ming;LIU Yuan-yuan;LI Xia;ZHONG Yi;LI Ying(Baorongshengwei(Shenyang)Technology Co.,Ltd.,Shenyang 110000,China)

机构地区：[1]保融盛维(沈阳)科技有限公司,沈阳110000

出　　处：《爆破》2024年第4期145-149,共5页Blasting

摘　　要：介绍了一种电子雷管总线电流采集方法的专利技术,使用低成本的硬件方案,实现高精度、宽范围的电流采集。应用于电子雷管的工作电流、通讯电流、充电电流、雷管总线电流负载的采集,实现电子雷管的状态监测、数据通讯、总线保护等。重点论述低成本电路设计思想,实现高精度、高分辨率、宽范围的电流采集方法。电子雷管控制模块的工作电流一般为10~30 uA,通过电流载波方式向起爆控制器发送数据,通讯电流一般为0.5~2 mA,并通过总线为发火储能电容充电,充电峰值电流1~2 mA。起爆控制器通过采集总线电流,判断电子控制模块的工作状态、采集通讯数据、充电情况等。电子雷管总线电流采集方法,使用低边电阻对电流采样,通过3路低成本的运算放大器代替差分比较器,使用MCU内部集成的12 bit AD转换器代替外部16 bit AD转换器,硬件成本降低80%以上。通过将电流分段采集,既满足了小电流采样精度,又扩展电流采样范围30倍,电流采样可覆盖总线额定电流。因无需外部AD转换模块,采样效率显著提高。A patented technology for bus current acquisition of electronic detonators is introduced,which uses a low-cost hardware solution to achieve high-precision and wide-range current acquisition.This technology is designed to monitor and acquire data related to the working current,communication current,charging current,and detonator bus current load for electronic detonators,thus enabling these devices′status monitoring,data communication,and bus protection.This system focuses on the innovative,low-cost circuit design concept and the methods employed to ensure high-precision,high-resolution,and wide-range current acquisition.The typical working current of the electronic detonator control module ranges between 10~30 uA,and data is transmitted to the detonation controller via a current carrier.The communication current typically falls within the 0.5~2 mA range,and the ignition energy storage capacitor is charged through the bus with a peak charging current of 1~2 mA.The detonation controller determines the working status of the electronic control module by acquiring bus current data,which includes communication and charging status,to determine the module′s working condition.In the current acquisition method discussed,low-side resistors are used to sample the current,replacing a differential comparator with three low-cost operational amplifiers.Furthermore,a 12 bit AD converter integrated into the MCU replaces an external 16-bit AD converter,which reduces hardware costs by over 80%.By segmenting the current collection,the system maintains the required accuracy for small current sampling and expands the current sampling range by 30 times,covering the rated current of the bus.The absence of an external AD conversion module significantly improves the sampling efficiency.

关 键 词：电子雷管 小电流采集 起爆器 总线通讯 低成本 

分 类 号：TD235.3[矿业工程—矿井建设]