New Zealand Journal of Agricultural Research abstracts
Study of an onboard information platform for a grain combine
harvester
Kang Feng
Wang Shu Mao*
Zhu Qing Yuan
Tan Yu
College of Engineering
China Agricultural University
PO Box 11417, Tsinghua East Road
Beijing 100083 PR China
*Author for correspondence: wangshumao@cau.edu.cn
Abstract Wheat is the main grain crop in China. The planted
area has increased to more than 300 million mu (about 20 million ha)
and the rate of machinery harvest has reached about 80%. It is
difficult to provide accurate information of wheat yield per mu in
different areas. This makes national macro-management and safeguarding
food security difficult. The combine harvester onboard information
platform studied in this paper has two functions. First, it detects
geographical information, harvested area and crop yield per mu and,
second it reports the state of the harvester and diagnoses faults. The
information platform provides service information for the driver which
improves reliability. In addition, it can send this information to an
information centre through a GSM (mobile phone) message module, and
this centre can forward the information to government administration
and research institutes through the network. The onboard information
platform cored with SCM 80C196 confirms geographical information of the
harvester by GPS (global positioning system) to create an electronic
map of the harvest area with actual harvest width and distance of
travel. With measurements taken when unloading the grain, crop yield
per mu can be calculated and the running status of the harvester as
well as fault diagnosis through monitoring sensors can be appraised.
Experiment shows that the measurement accuracy of harvest area and thus
of yield per mu is about 95%
Keywords combine harvester; fault diagnosis; GPS; GSM;
precision agriculture; yield estimation
A07110; online publication date 8 February 2008; Received and
accepted 10 August 2007
New Zealand Journal of Agricultural Research, 2007, Vol. 50: 927–934
0028–8233/07/5005–0927 © The Royal Society of New Zealand 2007
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