DocumentCode :
2086636
Title :
Study on grain loss detecting sensor of combine harvester
Author :
Zhan, Zhao ; Jing, Zhou
Author_Institution :
High-tech Key Lab. of Agric. Equip. & Intelligentization of Jiangsu Province, Zhenjiang, China
fYear :
2011
fDate :
27-29 May 2011
Firstpage :
109
Lastpage :
112
Abstract :
A floating raft structure sensor using piezoelectric polyvinylidene fluoride (PVDF) film as sensitive material for grain loss detecting of combine harvester was presented in this paper. Double-layer vibration isolator was proposed to eliminate the vibration influence of combine harvester. Signal processing circuit which composed of a charge amplifier, band-pass filter, envelope detector, absolute value amplifier and square wave generator was constructed to detect the grain impact signal. According to the impact duration of grain on PVDF film, critical frequencies of band-pass filter were determined and the impact responses of filter under different impact durations were numerical simulated. Then, grain detecting experiments were carried out by assembling the sensor on the rear of vibrating cleaning sieve, the results showed that the grain impact can be identified effectively from vibrating noise and the sensor can output a standard square voltage signal while a grain impact is detected.
Keywords :
agricultural machinery; agriculture; amplifiers; band-pass filters; polymers; sensors; signal processing; vibration isolation; PVDF film; absolute value amplifier; band-pass filter; charge amplifier; combine harvester; double-layer vibration isolator; envelope detector; floating raft structure sensor; grain impact signal; grain loss detecting sensor; piezoelectric polyvinylidene fluoride; signal processing circuit; square wave generator; vibrating cleaning sieve; Agricultural machinery; Band pass filters; Films; Interference; Low pass filters; Vibrations; Voltage control; PVDF film; combine harvester; detecting sensor; grain; loss;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
New Technology of Agricultural Engineering (ICAE), 2011 International Conference on
Conference_Location :
Zibo
Print_ISBN :
978-1-4244-9574-0
Type :
conf
DOI :
10.1109/ICAE.2011.5943761
Filename :
5943761
Link To Document :
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