CAJ | 학술논문

　　为精确诊断植物叶绿素含量，在一定程度上消除叶片厚度差异对叶绿素测量的影响，利用叶绿素在可见—近红外波段的光谱特性，引入叶片厚度参量建立叶绿素测量数学模型，开发了厚度补偿式叶绿素仪。该仪器包括叶片夹具装置、光源系统、光源驱动模块、接收检测模块、叶厚测量模块、单片机外围系统及软件系统；设计的光源系统采用一些简单光学元件，使两者波长能汇聚于同一处，简化了光学结构；设计了集叶绿素测量和厚度测量于一体的叶片夹具装置，以保证厚度测量点和叶绿素测量点为同一点；提出了运放反馈型恒流光源驱动电路方案，并测试了其输出电流以及光电检测器接收到的光强电压值变化，得到输出电流不变，光强电压值的标准差为1．15mV，使其稳流精度高，发光稳定；标定测量叶片厚度值的电感传感器，得到其传感器的线性度小于1％，回程误差3μm，分辨力为1μm，灵敏度为0．006 V/μm，传感器性能良好。
　　위정학진단식물협록소함량，재일정정도상소제협편후도차이대협록소측량적영향，이용협록소재가견—근홍외파단적광보특성，인입협편후도삼량건립협록소측량수학모형，개발료후도보상식협록소의。해의기포괄협편협구장치、광원계통、광원구동모괴、접수검측모괴、협후측량모괴、단편궤외위계통급연건계통；설계적광원계통채용일사간단광학원건，사량자파장능회취우동일처，간화료광학결구；설계료집협록소측량화후도측량우일체적협편협구장치，이보증후도측량점화협록소측량점위동일점；제출료운방반궤형항류광원구동전로방안，병측시료기수출전류이급광전검측기접수도적광강전압치변화，득도수출전류불변，광강전압치적표준차위1．15mV，사기은류정도고，발광은정；표정측량협편후도치적전감전감기，득도기전감기적선성도소우1％，회정오차3μm，분변력위1μm，령민도위0．006 V/μm，전감기성능량호。
In order to accurate diagnosis the plant chlorophyll content , and eliminate the influence of leaf thickness differences on the chlorophyll measurement in a certain extent ,according to the visible-near infrared spectral characteris-tics of the chlorophyll , the mathematical model of chlorophyll meter was established after introducing the leaf thickness parameter ,and the leaf thickness compensated chlorophyll meter was designed .The instrument consisted of leaf fixture de-vice,light source system ,light source driving , receiving detection module , leaf thickness measurement ,modules single-chip peripheral systems and software system;The simple optical components were used in the light source system ,so that the two wavelengths can together in the same place , which simplified the structure of the light path;and the leaf fixture device with chlorophyll measurement and thickness measurement in one ,ensure the two measurement points for the same;the light source driving which belonged to Op-amp feedback constant-current source was proposed , and tested the cur-rent output change , the standard deviation of the light intensity voltage value was 1.15mv,got the high steady flow preci-sion;then the sensor was calibrated ,got the sensor linearity was less than 1%,the return error was 3μm,the resolution is1μm, the sensitivity is 0.006 V/μm.We innovative introduce the leaf thickness compensation module to the chlorophyll meter, and the instrument can store data and interact with the host computer , low power consumption , easy operation , would realize the accurate measurement of plant nutrients and physical traits .