發(fā)布時(shí)間：2018-04-16 17:29

  本文選題：聯(lián)合收獲 + 谷物產(chǎn)量��； 參考：《黑龍江八一農(nóng)墾大學(xué)》2017年碩士論文

【摘要】：自動(dòng)化的谷物產(chǎn)量測(cè)量是實(shí)行精準(zhǔn)農(nóng)業(yè)收獲階段的重要組成部分,而且產(chǎn)量的高低同樣能夠集中體現(xiàn)谷物的生長(zhǎng)和管理狀況,但是收獲機(jī)械的實(shí)時(shí)產(chǎn)量的測(cè)量一直是農(nóng)業(yè)生產(chǎn)中的難點(diǎn),所以,獲取準(zhǔn)確的產(chǎn)量空間分布信息是實(shí)施精準(zhǔn)農(nóng)業(yè)的關(guān)鍵。本課題研究的目的就是通過研究谷物測(cè)產(chǎn)系統(tǒng)的關(guān)鍵技術(shù),開發(fā)了一款基于螺旋升運(yùn)原理的谷物產(chǎn)量傳感器,采用嵌入式處理器對(duì)產(chǎn)量信息進(jìn)行實(shí)時(shí)監(jiān)測(cè),實(shí)現(xiàn)低功耗和高測(cè)量精度的要求。通過螺旋升運(yùn)原理設(shè)計(jì)一套谷物測(cè)產(chǎn)試驗(yàn)臺(tái),選用12V直流電機(jī)為其提供升運(yùn)動(dòng)力。根據(jù)試驗(yàn)臺(tái)的螺旋升運(yùn)物理結(jié)構(gòu)和谷物在輸送腔體內(nèi)所受力的情況,在產(chǎn)生螺旋運(yùn)動(dòng)前及穩(wěn)定輸送過程中進(jìn)行動(dòng)力學(xué)分析,得到螺旋運(yùn)動(dòng)的臨界轉(zhuǎn)速。根據(jù)直流電機(jī)的本身參數(shù),螺旋升運(yùn)試驗(yàn)臺(tái)物理結(jié)構(gòu)和臨界轉(zhuǎn)速的約束,選取了測(cè)產(chǎn)實(shí)驗(yàn)的影響因素(包括機(jī)身傾斜角度和電機(jī)轉(zhuǎn)速),分別進(jìn)行谷物產(chǎn)量實(shí)驗(yàn)進(jìn)行誤差分析和功耗比較,最終選優(yōu)最佳方案。測(cè)產(chǎn)系統(tǒng)包括螺旋升運(yùn)式谷物產(chǎn)量傳感器和上位機(jī)PC組成,能夠?qū)崿F(xiàn)谷物產(chǎn)量信息采集、計(jì)算和存儲(chǔ)功能。具體功能如下所示:(1)就谷物產(chǎn)量傳感器的構(gòu)成來說,其內(nèi)部核心處理器一般選取的是高性能以及低功耗的構(gòu)件,在本次畢業(yè)設(shè)計(jì)中,選取的是基于ARM Cotex-M3為內(nèi)核的STM32F103VCT6嵌入式處理器;WHB20LSP5S2H型霍爾效應(yīng)原理-閉環(huán)電流傳感器為電流監(jiān)測(cè)電路核心元件,提供了高精度、能耗低的檢測(cè)方法;為了更好的顯示和設(shè)置螺旋升運(yùn)器的轉(zhuǎn)速和電流狀態(tài),設(shè)計(jì)了人機(jī)交互模塊來設(shè)置螺旋升運(yùn)直流電機(jī)PWM百分比、對(duì)螺旋升運(yùn)電機(jī)進(jìn)行啟停,同時(shí)利用分辨率為128*64的OLED設(shè)置參數(shù)、顯示和監(jiān)測(cè)數(shù)據(jù);(2)上位機(jī)PC端通過串口助手和無線模塊接收端,對(duì)谷物產(chǎn)量傳感器中螺旋升運(yùn)電機(jī)的轉(zhuǎn)速和電流進(jìn)行實(shí)時(shí)監(jiān)測(cè),采集產(chǎn)量信息完成后,可以通過串口助手保存數(shù)據(jù),把采集的數(shù)據(jù)導(dǎo)入EXCEL中進(jìn)行分析,繪制成曲線供研究調(diào)用。本文對(duì)筒腔內(nèi)的谷物進(jìn)行了一般動(dòng)力學(xué)和穩(wěn)定輸送情況下的動(dòng)力學(xué)分析,建立了一套根據(jù)輸送電機(jī)參數(shù)計(jì)算谷物產(chǎn)量的計(jì)量方法。根據(jù)研究方法設(shè)計(jì)了一種基于螺旋輸送機(jī)的谷物測(cè)產(chǎn)監(jiān)測(cè)系統(tǒng),通過采集電機(jī)的電壓、電流、轉(zhuǎn)速等相關(guān)參數(shù)計(jì)算谷物的流量。實(shí)驗(yàn)室內(nèi)進(jìn)行了試驗(yàn)驗(yàn)證,證明該方案可行,減少了谷物流量傳感器的設(shè)計(jì)成本,實(shí)驗(yàn)誤差較小。
[Abstract]:Grain yield measurement automation is an important part of the implementation of precision agriculture harvest stage, and the yield can also reflect the growth and management of grain yield, but the measurement of real harvesting machinery is always a difficult problem in agricultural production, so the yield space to obtain accurate distribution information is crucial for the implementation of precision agriculture. The key technology for the purpose of this research is through the study of grain yield monitoring system, is developed based on a spiral lifting principle yield sensor, adopts the embedded processor to output information for real-time monitoring, to achieve low power consumption and high measurement accuracy. The spiral lifting principle to design a set of grain yield test using 12V, DC motor provides power for the ascending movement. According to the spiral test bed lifting physical structure and grain stress in the conveying cavity, The dynamic analysis in spiral motion before and steady delivery process, get the critical speed of spiral motion. According to the DC motor parameters of spiral lifting structure of test-bed and the critical speed of the physical constraints, selected factors influence the experimental measurement (including body tilt angle and motor speed), respectively for grain production experiment error analysis and comparison of power consumption, the final selection of the best scheme. Yield measuring system comprises a spiral lifting type grain yield sensor and PC PC which can realize the grain production information collection, calculation and storage functions. The specific functions are as follows: (1) constitute the grain output sensor, its internal core processor selects the high performance and low power consumption component, in this graduation design, the selection is based on the ARM Cotex-M3 processor for embedded STM32F103VCT6 kernel; WHB20LSP5 The principle of Holzer effect - S2H type closed-loop current sensor for current monitoring circuit of core components, provides a high accuracy detection method has low energy consumption; in order to display and set the speed and current state of spiral conveyer, the human-computer interaction module to set screw lifting the DC motor PWM percentage of spiral lifting motor to start and stop at the same time, by setting the parameters for 128*64 resolution of OLED, display and monitoring data; (2) PC PC terminal assistant through the serial port and wireless receiver module, the spiral grain output sensor for real-time monitoring operation or the rotating speed of the motor and the current output information acquisition is completed, you can save the data through the serial port assistant, import the data into the EXCEL collection to analyze, draw curves for the study. This paper called grain on cylinder cavity is analyzed dynamic dynamics and steady delivery conditions According to the measurement, establishes a set of method to calculate the grain output of motor parameters. According to the study on design method of conveying a yield monitoring system based on the spiral conveyor grain, through the acquisition of the motor voltage, current, calculation of grain flow speed and other parameters. The laboratory test proved that the method is feasible, reduced the design cost of grain flow sensor, a small experimental error.

【學(xué)位授予單位】：黑龍江八一農(nóng)墾大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TP212;S126

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本文編號(hào)：1759902