PROBLEM TO BE SOLVED: To provide a growth state detector that can detect a growth state of a plant in an extremely simple manner and at a low cost.SOLUTION: A device for detecting a growth state of a plant is constituted to have: a movable member 12 capable of adjusting its position while moving in accordance with growth of a plant support members 13a to 13d provided opposing to the movable member 12 receiving means 15 which is provided for one of the opposing support members (13b, 13d) and arranged for a growth direction of the plant transmission means 14 which is provided for the other one of opposing support members (13a, 13c), and transmits detection wave which is impermeable or semi-permeable to the plant toward the receiving means 15 determination means 21 for outputting a determination signal when a value of the detection wave received by the receiving means 15 is changed by a fixed value from a present reference value and moving means for moving the movable member until a value of the detection wave returns to the reference value when the determination signal is output.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2017,JPO&INPIT【課題】 極めて簡単かつ低廉なコストで植物の成長状態を検出することのできる成長状態検出装置を提供する。【解決手段】 植物の成長状態を検出するための装置であって、植物の成長に応じて移動させて位置調整が可能な移動部材12と、この移動部材12に対向して設けられた支持部材13a~13dと、対向する支持部材の一方(13b,13d)に設けられ、植物の成長方向に合わせて配置された受信手段15と、対向する支持部材の他方(13a,13c)に設けられ、受信手段15に向けて前記植物に対し不透過又は半透過の検出波を発信する発信手段14と、受信手段15によって受信された前記検出波の値が、予め設定された基準値から一定値変化したときに判断信号を出力する判断手段21と、前記判断信号が出力されたときに、前記検出波の値が前記基準値に復帰するまで前記移動部材を移動させる移動手段とを有する構成とした。【選択図】 図3
