分离式数字记录装置的台阶增减算法

Plus/minus Step Algorithm for Separated Digital Recording Devices

分离式数字记录装置是一种与外界无连线、也不与外界进行任何形式的无线通讯的记录装置。主要用于对缓慢变化的被测量 (如西部某地恶劣环境温度 )进行长期自动的数据采集后 ,再取回用微机对其所记数据进行分析。具有尽量简单的结构和尽量长的存储器一次可记录时间非常重要。文献 [1]中提出并讨论了“时隔门限记录”法 ,在一定条件下可极大地延长存储器一次可记录时间。但该法不能反映记录点之间的“快速有效变化”,且需要设置较多的存储器位数来防止溢出。一个新的“台阶增减算法”,可以较好地解决上述问题 。

A separated data recording device is a kind of individual unit which has neither wire connection nor any form of wireless communication with other units.It is used for automatically recording values of some slowly varying parameters(for example,air temperature of abominable weather at a point in the west)for a very long period of time and then back to a microcomputer for data analyzing.It's very important to be as simple as possible in structure,and as long as possible for one time memory usable period(OTMUP).An algorithm called recording on time interval and threshold was presented and discussed in [1],with which very long OTMUP can be got under certain conditions,but it does not react with any !faster significant change'between recording points,more bits of each location are needed to prevent overflow.Using a new recording algorithm called plus/minus step,the problems described above can be solved quite satisfactorily,with very simple memory structrue as well.