A digital closed-loop control system for automating measurements of light compensation points

被引：0
|
作者：
van Lieburg, MJ [1 ]
机构：
[1] Sylvania Lighting Int, Sylvania BioSyst, NL-6700 AG Wageningen, Netherlands
来源：
THIRD INTERNATIONAL SYMPOSIUM ON ARTIFICIAL LIGHTING IN HORTICULTURE | 1997年 / 418期
关键词：
D O I：
10.17660/ActaHortic.1997.418.31
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
An automated system is described for measuring light compensation points (LCP) of plants or plant parts as an alternative for laborious determination procedures whose efficiency depends to a great extent on personal judgement of the research worker. The system consists of an air-tight transparent container in which the plant or plant part is to be placed and an optional light source which is varied in height interactively with the CO2 signal through a personal computer in combination with an interface. PLD (proportional-integral-derivative) controller action ensures reaching the LCP and the CO2 setpoint without overshoot.
引用
收藏
页码：229 / 232
页数：4
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