Title :
Detecting of water shortage information in crops with acoustic emission technology and automatic irrigation system
Author :
Yang, Shi-feng ; Guo, Jian-ying ; Wang, Xiu-Qing
Author_Institution :
Coll. of Electron. Inf. & Autom., Tianjin Univ. of Sci. & Technol., Tianjin
Abstract :
The automatic and real time irrigation system based on detecting of water shortage information in crops with acoustic emission (AE) technology was studied and developed, an experimental study in greenhouse with the crop of tomato as the target was carried out. PCI-2 AE board-card, R15 sensor, electronic balance, temperature sensor, humidity sensor, CO2 sensor, illumination sensor and PCI-8333 DAQ were adopted to compose the hardware detecting system, the virtual instrument technology was used to construct the software system, the three factors of soil, crops and atmosphere in SPAC system were effectively integrated, the real time acquisition and detecting system of information between crop acoustic emission and each environmental factor was established. It shows that: to some extent, the frequency counts of AE of the crops in water stress increase gradually with the increase of the water stress extent in crops, and are related with the transpiration rate of crops; in order to avoid the influence from water stress on crops, it has the potential to realize the automatic irrigation and regulation in crops based on the information acquired from crops with AE sensor, to make the transpiration amount and irrigation amount of crops achieve an balanced regulation, aiming to make the crops grow in an optimum soil water environment, to increase the utilization of water, and improve the quality of crop fruit.
Keywords :
acoustic emission testing; crops; data acquisition; gas sensors; greenhouses; humidity sensors; irrigation; temperature sensors; transpiration; virtual instrumentation; water conservation; PCI-2 AE board-card; PCI-8333 DAQ; R15 sensor; acoustic emission technology; atmospheric SPAC system; automatic irrigation system; carbon-di-oxide sensor; crop fruit quality; crop water shortage information detection; crops transpiration rate; electronic balance; environmental factor; greenhouse; hardware detecting system; humidity sensor; illumination sensor; real time acquisition system; temperature sensor; tomato crop; virtual instrument technology; Acoustic emission; Acoustic sensors; Acoustic signal detection; Crops; Gas detectors; Irrigation; Real time systems; Sensor systems; Stress; Temperature sensors; Water stress; acoustic emissions; detect; virtual instrument;
Conference_Titel :
Piezoelectricity, Acoustic Waves, and Device Applications, 2008. SPAWDA 2008. Symposium on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-2891-5
DOI :
10.1109/SPAWDA.2008.4775854