Wireless sensor network for monitoring greenhouse environment and energy-saving transmission method thereof
A wireless sensor and environmental monitoring technology, applied in network topology, wireless communication, network traffic/resource management, etc., can solve problems such as difficult replenishment and limited battery energy, and achieve the effect of ensuring accuracy
Inactive Publication Date: 2014-01-22
JIANGSU UNIV
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Since the wireless sensor network consists of a group of sensor nodes with limited functions to cooperate in a self-organized manner to complete large-scale sensing tasks; each sensor node carries a battery with limited energy and is not easy to replenish.
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[0013] 1. Event-driven perception node data preprocessing
[0014] Sensing node data preprocessing belongs to the low-level fusion technology of wireless sensor network data fusion, and the fusion result is directly transmitted to the sink node, which is the basis of subsequent data fusion. For the data sensing nodes of the wireless sensor network, two processing thresholds are set: ε and τ, where ε defines the difference between the sensing data. When the difference exceeds the threshold ε, it is considered that the data has a mutation phenomenon. In order to ensure the real-time monitoring requirements of the greenhouse data, jump transmission is required; τ sets the number of acquisitions of the sensor node, and the data does not undergo a mutation within τ acquisition cycles , calculate the mean value of the current data and the previous i-1 times, and then transmit it to the sink node. The event-driven perception node data preprocessing algorithm is as follows:
[0015]...
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The invention discloses a wireless sensor network for monitoring the greenhouse environment and an energy-saving transmission method thereof. The method is characterized in that data preprocessing is carried out on a sensing node by adopting an event driving model, and data fusion of multiple sensors is carried out on an aggregation node by adopting a support-degree model; i.e., the sensing node carries out accumulated transmission or hopping real-time transmission on acquired greenhouse environment data according to a set threshold, and on the premise of meeting the real-time processing of an event, the data transmission quantity of the sensing node is reduced. After the sensing node transmits the data to the aggregation node, the aggregation node calculates out optimal weight of all data according to the support degree among the sensor data and finally calculates out a fusion value of the data. The wireless sensor network disclosed by the invention has the advantages that a reliable basis is provided for decision of the system, the accuracy of control is ensured and energy-saving transmission of the system is realized.
Description
technical field [0001] The invention belongs to the technical field of greenhouse environment measurement and control for facility agriculture, and in particular relates to an energy-saving transmission method for a greenhouse wireless sensor network. Background technique [0002] Wireless sensor network integrates sensor technology, MEMS technology, wireless communication technology, embedded computing technology and distributed information processing technology, and provides a new way for people to obtain and process information. The application of wireless sensor networks in greenhouses will be able to obtain crop environment and crop information efficiently and in real time, effectively reduce manpower consumption, and accelerate the modernization process. Since the wireless sensor network consists of a group of sensor nodes with limited functions to cooperate in a self-organized manner to complete large-scale sensing tasks; each sensor node carries a battery with limite...
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Login to View More IPC IPC(8): H04W28/06H04W84/18
CPCY02D30/70
Inventor 王纪章彭玉礼李萍萍王新忠
Owner JIANGSU UNIV