| 基于微波传输技术的日光温室无线输电系统设计与试验 |
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| 引用本文： | 王立舒,刘雷,王锦锋,文竞晨,乔帅翔,王书宇.基于微波传输技术的日光温室无线输电系统设计与试验[J].农业工程学报,2018,34(16):214-224. |
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| 作者姓名： | 王立舒 刘雷 王锦锋 文竞晨 乔帅翔 王书宇 |
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| 作者单位： | 东北农业大学电气与信息学院 |
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| 基金项目： | 黑龙江省教育厅科技课题（12521038）；教育部春晖计划（Z2012074） |
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| 摘 要： | 为解决日光温室内部传感器驱动电路的供电受有线供电制约的问题,使传感器安装及其供电设计模块化、简单化,该文运用无线输电及微波传输技术,将磁控管CK-620A产生的微波作为温室内传感器驱动电路的供电电源。以所搭建的光伏微波无线电力传输系统为基础,探究从发射端到接收端的传输过程中,植被散射、空间电磁波环境对传输效率的影响。以冬季哈尔滨市12月份一天内不同距离、不同时间段下以黄瓜为主的日光温室为试验对象,测试并分析了其对光伏微波无线电力传输系统接收功率的影响。探究了提高日光温室无线输电系统传输效率的方法,提出了低功率损耗的微波发射源设计方案,给出了理论电路图。试验结果表明,当发射功率500 W时,系统能够对8 m范围内的传感器设备进行有效供电。但距离场源较近的位置,易受散射的影响。采用6?7结构的微带天线,最大辐射方向的增益与采用矩形喇叭天线的方式相比提高了0.28 d B,即天线的定向性要好一些,在0~8 m内接收功率平均可提高1.58 W。
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| 关 键 词： | 温室 微波 试验 无线输电 散射 微带天线 |
| 收稿时间： | 2018/4/9 0:00:00 |
| 修稿时间： | 2018/7/13 0:00:00 |
Design and test of wireless power transmission system in solar greenhouse based on microwave transmission technology |
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| Wang Lishu,Liu Lei,Wang Jinfeng,Wen Jingchen,Qiao Shuaixiang and Wang Shuyu.Design and test of wireless power transmission system in solar greenhouse based on microwave transmission technology[J].Transactions of the Chinese Society of Agricultural Engineering,2018,34(16):214-224. |
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| Authors: | Wang Lishu Liu Lei Wang Jinfeng Wen Jingchen Qiao Shuaixiang and Wang Shuyu |
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| Institution: | Institute of Electrical and Information, Northeast Agricultural University, Harbin 150030, China,Institute of Electrical and Information, Northeast Agricultural University, Harbin 150030, China,Institute of Electrical and Information, Northeast Agricultural University, Harbin 150030, China,Institute of Electrical and Information, Northeast Agricultural University, Harbin 150030, China,Institute of Electrical and Information, Northeast Agricultural University, Harbin 150030, China and Institute of Electrical and Information, Northeast Agricultural University, Harbin 150030, China |
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| Abstract: | Abstract: The power supply of the sensors driving circuit inside the solar greenhouse was restricted by the wired power supply, it is necessary to modularize and simplify the installation of the sensor and the design of the power supply. The wireless transmission and microwave transmission technologies were used as the power supply for the sensor drive circuit in the greenhouse in this paper. Based on the built-in photovoltaic microwave wireless power transmission system, the influence of various environmental factors on the transmission efficiency during the transmission process from the transmitting end to the receiving end was explored. The electromagnetic radiation of the transmitting antenna was simulated by using Ansoft HFSS software, and the radiation range of the transmitting antenna was obtained. On basis of energy conservation law and microwave theory, the relationship between received power and radiation efficiency, receiving distance and antenna size under the conditions of ideal environment and illumination intensity was analyzed by using MATLAB software. Taking the electromagnetic wave environment in the greenhouse at different distances and different time periods in one day of December in Harbin''s winter as the test object, the influence of the electromagnetic wave environment on the receiving power of photovoltaic microwave wireless power transmission system was tested and analyzed. The method of improving the transmission efficiency of solar greenhouse wireless transmission system was further explored. The structure of microstrip antenna array was given and the design concept of RC varactor diode automatic phase modulation circuit was proposed, and the reason why the RC varactor automatic phase modulator was used to make the phase of each array element in phase was deduced theoretically. Based on this theory and research, the microstrip antenna array was simulated and analyzed subsequently. Aiming at the design problem of microwave emission source, a design scheme of microwave power source with low power loss was proposed. The theoretical circuit diagram was given and simulated. The effect that microstrip antenna array can improve and enhance wireless transmission efficiency in solar greenhouse had been verified by further experiments. The test results showed that the system can effectively supply power for the sensor equipment within 8 m when the transmitting power was 500 W by microwave wireless transmission method and it can get 19.28 dB antenna gain of the maximum radiation direction of the microstrip antenna with 6×7 structure. Compared with the horn antenna, the gain of the microstrip antenna array is improved, that is, the orientation of the microstrip antenna array is better. The transmission efficiency can be improved by using the microstrip antenna array method, and the average receiving power can be increased by 1.58 W in the range of 0 ~8 m. |
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| Keywords: | greenhouse microwave experiments wireless power transmission scattering microstrip antenna |
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