针对现场运行单相电能表时钟偏差较大的问题,以及推进新型业务的需要,提出了一款时钟免维护固件易升级单相电能表的设计方案。通过采用无线时钟同步技术实现时钟自动同步更新;采用固件广播升级技术实现同时升级多块单相电能表,升级时间降为原来的五分之一;采用低成本、高可靠性、易实现、易维护的简易文件系统,实现存储数据格式自动维护,避免丢失参数及数据。该设计保证时钟准确度不受环境因素影响,升级效率大幅度提高,现场维护工作量大幅度减少。
Abstract
Aiming at the problem of large clock deviation of single-phase electricity meter in field operation and the need of promoting new business, a new kind of single-phase electricity meter with clock maintenance-free and firmware upgrade easily was proposed. Through the use of wireless clock synchronization technology to achieve automatic clock synchronization update, the test clock deviation was less than 2 seconds in the environment of -25~70℃;the firmware broadcasting upgrade technology was used to upgrade multiple single-phase electricity meters at the same time, the upgrade time was reduced to one fifth of the original time;the simple file system with low cost, high reliability, easy implementation and easy maintenance were adopted to realize automatic maintenance of storage data format. To avoid losing parameters and data. The design ensures that the clock accuracy is not affected by environmental factors, the upgrading efficiency is greatly improved, and the workload of on-site maintenance is greatly reduced.
关键词
计量学 /
时钟免维护 /
无线时钟同步 /
固件广播升级 /
严密握手链接机制 /
数据补包策略 /
多重数据安全校验 /
模块独立化
Key words
metrology /
clock maintenance-free /
wireless clock synchronization /
firmware broadcasting upgrade /
tight handshake link mechanism /
data padding strategy /
multiple data security verification /
module independence
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参考文献
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基金
国家电网公司总部管理科技项目（52010115002Q）
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