束流位置测量系统（BPM）是加速器束流诊断的最重要测量系统之一，也是束诊设备中数量最多的设备，所需经费高居束诊系统第一位。目前数字BPM基本被国外公司所垄断，产品价格昂贵，源码不开放，二次开发困难，维护升级成本高。而且由于强流高功率直线加速器对BPM系统提出更高需求，除位置、相位测量外，还要求实时准确为机器快保护和超导腔失超后的快速补偿提供关键依据，而商业产品无法满足新需求。因此面对国际垄断、高昂的设备采购和维护费用以及国家重大需求，本项目旨在研发具有自主知识产权的质子重离子强流直线加速器数字束流位置测量系统，填补我国自研数字BPM在质子重离子强流直线加速器的空白。.本项目所要研发的嵌入式数字BPM即能独立运行又能在总线模式下运行，具有高灵活性，并满足强流高功率直线加速器快机器保护的更高需求，实现差分BPM功能，同时系统具有智能化自检测故障诊断和在线标定校准功能，测量准确性更高。

As one of the key instruments in the diagnostic system, beam position measurement (BPM) system has the largest number and is the most expensive part. Presently digital beam position measurement (DBPM) system is monopolized by the Instrument Technology Company. The product is expensive, the further development could not be done as the source codes are not open, and it costs too much for the maintenance and upgrade as well. Furthermore, because of the higher demand of the safe running of the high power linear accelerator machine, except the normal position and phase measurements, the BPM system is required to give the real-time accurate data and judgement for the fast machine protection system and also the superconducting cavity recovery after a quench. The commercial products could not fit all those new requirements. Because of the international monopoly, high price for the procurement and maintenance, higher requirements, as well as the country needs, this project aims to develop a set of DBPM for the proton and heavy ion high current linear accelerator with independent intellectual property rights. It will also fill in the black of DBPM research for linear hadron accelerators in our country..This project is to develop a set of embedded DBPM which could run independently or in the bus mode. It could meet the higher demand of the fast machine protection system of the high power linear accelerator. The differential BPM function, the self-diagnosis fault testing and on-line calibration could be realized as well. The measurement accuracy would be even higher compared to the commercial products.