本文選題：植物電 + 環(huán)境因子控制　； 參考：《天津職業(yè)技術(shù)師范大學(xué)》2017年碩士論文

【摘要】：植物電信號(hào)是植物對外界刺激所反映的一種重要物理信號(hào),隨著計(jì)算機(jī)和檢測技術(shù)的發(fā)展,植物電信號(hào)也在此基礎(chǔ)上得到了迅速的發(fā)展,未來有可能產(chǎn)生一門新的學(xué)科—植物電子學(xué)。但我國對植物電信號(hào)的研究起步較晚,研究成果不是很多,本文在前人已有研究的基礎(chǔ)上,對幾種植物及其電信號(hào)做了比較系統(tǒng)的研究。本研究的主要內(nèi)容如下:1.對環(huán)境因子及采集系統(tǒng)進(jìn)行設(shè)計(jì)與研究,環(huán)境因子控制由植物生長柜完成,本文主要介紹了控制光照和濃度,而采集系統(tǒng)主要包括電極、采集裝置(包括硬件與軟件LabVIEW)、屏蔽措施、計(jì)算機(jī)及其處理軟件,選用小波消噪,現(xiàn)場對噪聲和電信號(hào)進(jìn)行采集,取得良好效果。2.研究方法采用對植物電信號(hào)的時(shí)域分析、頻域分析以及時(shí)頻域分析,時(shí)域分析方法包括對采集到的植物電信號(hào)計(jì)算其均值、峰峰值、方差以及均方差等特征值,頻域分析方法采用AR功率譜法進(jìn)行分析研究,由功率譜圖對植物電信號(hào)頻域特性進(jìn)行直觀的研究,為了更好地說明頻域特性,分別計(jì)算了譜重心頻率、譜邊緣頻率和功率譜熵三個(gè)特征值,時(shí)頻域分析方法采用小波變換、短時(shí)傅里葉變換以及小波分解對植物電信號(hào)進(jìn)行了較為系統(tǒng)的分析。3.研究不同環(huán)境因子對植物電信號(hào)的影響,由于環(huán)境因子眾多,本文分別選用光照因子和濃度作為可控因子,研究三種單子葉植物在不同光照條件、濃度下的植物電信號(hào)變化以及結(jié)合時(shí)域、頻域、時(shí)頻域分析,以此找到各種植物最適宜的環(huán)境條件(最適宜光照條件和最適宜濃度),蘆薈的最佳光照區(qū)間為50%-80%光照度(24025-29459Lux),紅掌的最佳光照區(qū)間是35%-65%光照度(19240-27919Lux),白掌的最佳光照區(qū)間大致也為35%-65%光照度(19240-27919Lux)。而三種植物的最佳濃度均在1000ppm以上。4.將光照與濃度聯(lián)合控制作為可控因子,觀察兩種因子協(xié)同作用對植物電信號(hào)的影響,在紅掌最佳濃度下再次增加光照度,對植物電信號(hào)做特性分析,結(jié)果表明,高濃度下植物所需最佳光照度會(huì)繼續(xù)加強(qiáng),在1000ppm濃度下,紅掌最佳光照度區(qū)間上升為80%-100%光照度,在這一區(qū)間光合作用最強(qiáng)。為溫室調(diào)控下和光照度聯(lián)合控制奠定基礎(chǔ)。
[Abstract]:Plant electrical signal is an important physical signal reflected by plant stimulation to the outside world. With the development of computer and detection technology, plant electrical signal has also been developed rapidly on this basis. A new discipline, plant electronics, is likely to emerge in the future. However, the research on plant electrical signals in China started relatively late, and the research results are not many. Based on the previous studies, this paper makes a systematic study on several plants and their electrical signals. The main contents of this study are as follows: 1. The design and research of environmental factors and collecting system are carried out. The control of environmental factors is accomplished by the plant growth cabinet. This paper mainly introduces the control of light and concentration, and the collection system mainly includes electrodes. The acquisition device (including hardware and software LabVIEW, shielding measures, computer and its processing software, wavelet de-noising, scene acquisition of noise and electrical signals) has achieved good results. Methods the time domain analysis and frequency domain analysis were used to analyze the plant electrical signals in time domain. The time domain analysis methods included calculating the mean value, peak value, variance and mean square deviation of the collected plant electrical signals. The frequency domain analysis method is based on AR power spectrum method. The frequency domain characteristics of plant electrical signals are studied intuitively by power spectrum map. In order to better explain the frequency domain characteristics, the frequency of the center of gravity of the spectrum is calculated separately. There are three eigenvalues of spectral edge frequency and power spectral entropy. Wavelet transform, short time Fourier transform and wavelet decomposition are used to analyze plant electrical signals systematically. The effects of different environmental factors on plant electrical signals were studied. Because of many environmental factors, illumination factor and concentration were selected as controllable factors respectively, and three monocotyledonous plants were studied under different illumination conditions. The changes of plant electrical signals at concentration and their combination with time-domain, frequency-domain, time-frequency domain analysis, In order to find the most suitable environmental conditions (optimum light condition and optimum concentration) for all kinds of plants, the optimum illumination range of aloe is 50-80% light intensity 24025-29459LuxA, the best illumination interval of red palm is 35-65% light intensity 19240-27919Luxo, the best light interval of white palm is the best light interval. Roughly 35-65% illumination 19240-27919 LuxA. The optimum concentration of the three plants was above. 4. 1000ppm. With the combination control of illumination and concentration as controllable factor, the effect of synergistic effect of two factors on plant electrical signal was observed, and the illuminance was increased again at the best concentration of clam, and the characteristic of plant electrical signal was analyzed. At high concentration, the optimum light intensity of plant will continue to strengthen. At the concentration of 1000ppm, the optimum light intensity range of red paw rose to 80-100%, and the photosynthesis was the strongest in this region. It lays a foundation for the joint control of light intensity and greenhouse control.
【學(xué)位授予單位】：天津職業(yè)技術(shù)師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：Q945;TP274.2

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