针对合肥光源储存环恒流运行(Top-off)改造等性能提升的需要，研制了新型的基于嵌入式EPICS架构的储存环束流损失监测(BLM)系统，用于监测储存环中束流损失发生的位置和大小。新BLM处理器获取储存环各处双PIN型光电二极管传感器所采集的簇射电子的信号，分析处理后通过各个处理器内部的嵌入式系统所运行的EPICS程序将数据实时发布到加速器控制网络，使中控室能够实时获取束损的数据。新BLM系统能够实时对双PIN型传感器进行自检操作，排查故障隐患，提高了系统运行的效率和可靠性，经过试运行表明，新BLM系统可完全满足合肥光源恒流的运行需要。

A new beam loss monitor system based on embedded EPICS is developed for the top-off upgrade of HLS-Ⅱ, to monitor the position and value of beam loss of storage ring. The electron shower signals are obtained by the double PIN photodiode detectors around the storage ring, then acquired by the new BLM processors, where the beam loss signals are analysed and distributed to the accelerator control network, by embedded EPICS on embedded Linux system of the BLM processors, and the beam loss data could be obtained in the central control room. The new BLM system could actuate the self-checking function of the double PIN photodiode detectors, eliminate hidden malfunction of the detectors, and improve stability and reliability of the whole system. Preliminary operation shows that the new BLM system can meet the needs of the top-off upgrade of HLS-Ⅱ.