Yunhe Zhang
Center for Information Technology
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Featured researches published by Yunhe Zhang.
international conference on computer and computing technologies in agriculture | 2007
Cheng Wang; Chunjiang Zhao; Xiaojun Qiao; Xin Zhang; Yunhe Zhang
Wireless sensor networks are integrated of sensor techniques, embedded system techniques, distributed computation techniques and wireless communication techniques. It’s a hot research area in the world. It will be widely used in agriculture. This paper introduces the hardware and software design of wireless sensor networks node for the measurement of greenhouse environment parameters. These nodes can form networks themselves, measure the environment parameters precisely, transfer data safely, and solve the difficulty of wiring in greenhouse, making the earlier research of wireless sensor networks used in greenhouse
international forum on computer science-technology and applications | 2009
Jiaxing Che; Chunjiang Zhao; Yunhe Zhang; Cheng Wang; Xiaojun Qiao
In order to build a more compact, simple, mobile and reliable vision measurement system in plant physiological parameter measurement, we choose the smart camera and infrared light source as the principle components. The hardware architecture of smart camera and the software development process is described. An example of leaf area measurement algorithm is shown which include camera calibration section to establish the spatial relationship between leaf and camera. Special initialized a snake active contour is able to separate the leaf boundary from its petiole. With the extrinsic parameters and contour of leaf we can calculate the real area of leaf. Similarly, other useful plant physiological parameters such as the diameter of fruit, height of plant could be achieved with this system.
international conference on computer and computing technologies in agriculture | 2007
Chunjiang Zhao; Yunhe Zhang; Cheng Wang; Xiaojun Qiao; Ruirui Hao; Yueying Yang
Traditional water-saving irrigation management turns on water pump in a settled interval decided by grower’s experience. The method just saves water on the back of losing yield. In order to result the problem, a kind of greenhouse efficient irrigation management system based on Evapotranspiration has been developed. The system includes greenhouse environmental monitoring subsystem, irrigation analysis subsystem, control methods, can instruct users to irrigation greenhouse through quantitative calculating greenhouse crop water requirement. The system has been examined in greenhouses of ShengFangYuan Test Station in Beijing, China; the result shows that the system can instruct greenhouse irrigation efficiently, increase yield 18%, and save water 28%.
international conference on computer and computing technologies in agriculture | 2010
Xin Zhang; Xiaojun Qiao; Wengang Zheng; Cheng Wang; Yunhe Zhang
For settling the problem of acquiring environment parameters quickly and responding in time in greenhouse which has low ability of auto-controlling environment. This paper designed a voice service system which was used in greenhouse for environment information collecting. This equipment can acquire and analyze the parameters of temperature, humidity, illumination, dew point temperature, soil temperature, soil humidity. And it offered alarm and environ- ment controlling suggestion by voice. This equipment achieved data acquiring, storage, displaying and voice service by MCU msp430 and voice chip PM50S100. Expert knowledge which had simple decision logic was embedded in this system. This equipment offered simple voice service based on the collecting data in greenhouse. And it had advantages of convenience operation, low power consumption through the test in greenhouse.
Archive | 2012
Kun Bi; Cheng Wang; Dazhou Zhu; Jihua Wang; Yunhe Zhang
Archive | 2010
Hongwu Tian; Cheng Wang; Xin Zhang; Yunhe Zhang; Chunjiang Zhao; Xiande Zhao
Archive | 2009
Chunjiang Zhao; Cheng Wang; Yunhe Zhang; Xiaojun Qiao; Xin Zhang; Ruifeng Hou; Hongwu Tian; Yueying Yang; Xiaohong Du; Hong Chen; Yuanfang Yao
Archive | 2009
Chunjiang Zhao; Cheng Wang; Xin Zhang; Xiaojun Qiao; Yunhe Zhang; Hongwu Tian
Archive | 2009
Cheng Wang; Ruifeng Hou; Chunjiang Zhao; Xiaojun Qiao; Yunhe Zhang; Hongwu Tian
world automation congress | 2010
Jiaxing Che; Chunjiang Zhao; Yunhe Zhang; Cheng Wang; Xiaojun Qiao; Xinlu Zhang