摘要
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。它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。其主要设计要求是简单、便宜、可靠、和存储器一次可记录时间 (从装置存储器第一个单元记录有效数据算起 ,到最后一个单元被占。)长。在文献 [1]中提出并讨论了时隔门限记录法 ,通过对被测量取一适当的门限值并采用一种特别的相对时隔记录方法 ,延长了存储器的可用时间。提出并详细描述了一个称为双级时隔记录法的新算法及其恢复算法 ,利用此方法 ,既可以获得较长的记录时间 ,又可以在一定程度上捕获被测量的一些短时变化。在某些场合这样做是必要的。
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.Simple in structure,cheap in price,good reliability,and long memory usable time(from the time the first location of the unit memory being used for storing significant data to the moment the last location being occupied.)are requirements for the designer.An algorithm called recording on time interval and threshold was presented and discussed by the author in a previous paper,the memory usable period prolonged due to a special storing method of relative time interval and a suitable threshold for the monitored parameter.A new recording algorithm called recording on two time intervals and its decompressing algorithm are described in detail.With this algorithm ,quite satisfactory length of memory usable time can be get.And also,short changes of the parameter being recorded can be caught to some extent.It is necessary in some cases.
出处
《仪表技术与传感器》
CSCD
北大核心
2002年第10期47-49,共3页
Instrument Technique and Sensor
关键词
分离式数字记录装置
双级时隔记录
时隔门限记录
一级时隔
二级时隔
有效时刻
有效变化
Recording on Two Time Intervals
Recording on Time Interval and Threshold
First Time Interval
Second Time Interval
Significant Moment
Significant Change
