1、2215 单词， 1.2 万英文字符 ， 3540 汉字 出处： Zhao X, Zheng X, Chen D, et al. The design and implementation of the greenhouse monitoring system based on GSM and RF technologiesC/ International Conference on Computational Problem-Solving. IEEE, 2013. The Design and Implementation of the Greenhouse Monitoring Syst
2、em Based on GSM and RFTechnologies X Zhao， X Zheng， C Duan， Z Chen Abstract According to the characteristics of small andmedium-sized greenhouse environmental monitoring, this paperproposes a solution to remote greenhouse environmentalmonitoring which is based on GSM technology and RF. Thesystem con
3、stitutes the regional environmental informationmonitoring network and close communication platform based onradio frequency. Combined with the remote communicationtechnology based on GSM networks, the system implementssmall and medium-sized greenhouse environmental monitoring.Using ATmega16A,low-powe
4、r chip PTR4000 and Huaweiwireless module GTM900-C to design monitoring nodes and sinknodes of the system, the paper gives the systems hardware structure and software workflow chart. It shows that the systemis stable, reliable, and its able to achieve real-time monitoring ofgreenhouse environment. Ke
5、ywords:RF； sink node； wireless communication； greenhouseenvironmental monitoring； wireless sensor network I. Introduction In recent years, with the rapid development of thegreenhouse industry, the greenhouse environment controltechnology is of higher requirements because of how to obtainaccurate and
6、 reliable information, as described by 1-2. InChina, most of existing greenhouse control systems useswired communication, which inevitably faces with wiringproblem. The wiring problem includes mass construction,high cost, installation and maintenance difficulties and that abroken node is likely to c
7、ause the entire system out of work.Using wireless communication is absolutely the bestsolutionto these problems. The wireless communication does notrequire wiring, its low cost and easy to maintain and you canalso increase or decrease the measurement node arbitrarily.Thus, it has good application pr
8、ospects. Through literature review, it is found that some domesticscholars utilizedwireless sensor network technology in 3-4；while some scholars usedmicroprocessors with Zigbeetechnology and multi-sensor fusion technology to design greenhouse monitoring sensor nodes, as in 5； And somescholars utiliz
9、edinterventional Internet or Intranet way toachieve remote monitoring in 6； Ref.2 presented therewere also some scholars who used GSM technologycombined with wireless sensor network technology to designgreenhouse environment monitoring system. These projectsare relatively good designs, but their har
10、dware designs are complex and of high cost, especially in small greenhousemonitoring applications, the cost performance is not high. Inview of this, I integrate GSM wireless communicationtechnology and radio frequency (RF) technology, and makethe use of the existing GSM network terminal - GSM module
11、for remote data transmissionapplication conditions mergingwith the RF technology. Eventually, I put forward a cost-effective solution to small and medium-sized greenhousemonitoring. The system based on RF technology constitutes aregional environmental information monitoring network andcombined with
12、GSM remote communication technology,realizes the remote monitoring of small greenhouseenvironment successfully. Experimental results show that thissystem is particularly suitable for data acquisition system with short distances and requiring high reliability. II. System Architecture The greenhouse m
13、onitoring system integrates the RFtechnology and GSM technology and applies the RFtechnology to the design of wireless monitoring nodes andsink nodes. Through initializing the RF module PTR4000 andmatching address, the data collected by monitoring nodes isdelivered to the sink nodes which deal with
14、the received data.The processed data is uploaded to the specified server by theremote communication terminal (GTM900-C) based on GSMnetwork. The data transmission between monitoring nodesdecreases the power and increases the speed. Besides each monitoring node and sink node form a local area network
15、 andthe data is sent to the specified server by a common GSMmodule, which prevents the uploading of single data, thusgreatly reducing system development costs. The monitoring system is mainly composed of three parts:wireless monitoring nodes, sink nodes, and remotecommunications terminal based on GS
16、M network. The systemarchitecture is shown in Fig. 1. Monitoring nodes are used to collect parameters ofgreenhouse environment such as temperature, humidity and soon. Sink node is monitoring data collector and sorter, which isresponsible for monitoring communications between theregion and the server
17、. Sink node receives the data sent bymotoring nodes, analyzes it to make a decision, and thenremotely delivers the processed data through GSM module.Each motoring node is equipped with wireless communicationRF module so that theparameters of greenhouse environmentare transmitted. Sink node is equipp
18、ed with not only wirelesscommunication RF module but also GSM communication module which is used to achieve communication between sinknode and remote sever. Figure 1The system architecture III. The HardwareDesign A. The Hardware Design of Monitoring Nodes Monitoring nodes use ATmega16A as MCU, and u
19、tilizePTR4000 as the RF module. MCU initializes PTR4000 toselect the working way of monitoring nodes and matchcommunication address. After monitoring nodes receive theinstructions sent by sink node, MCU sends the data collectedby sensors to specified sink node through PTR4000. As shown in Fig. 2, th
20、e whole hardware system involvespower module, microprocessor module, RF module and dataacquisition modules. Figure 2The monitoring node hardware circuits diagram In the design, the high-speed and low-power datatransmission module PTR4000 based on one-chip wirelesstransceiver chip nRF2401A which is i
21、ssued by Nordic isselected as wireless communication RF module. Ref. 7-8presented the chips characteristics. It is of low power and itsoperating voltage is 1.9V3.6V. A 2.4GHz antenna is built inthe chip and it takes global open 2.4GHz band, whichestablishes 128 channels (each channel bandwidth is 1M
22、Hz)between 2400MHz and 2527MHz and the switching timebetween channels is less than 200ms. The hardware CRC error detection is built in the chip so that error rate can be reducedwithout increasing the difficulty of programming. The chipsupports multi-point communication with efficient GMSKmodulation
23、and the maximum transfer rate is up to 1Mbit/s.The module address can be set by software so that the datacan be output only if the address of the local machine isreceived. The data collecting module is mainly responsible forcollecting parameters of greenhouse environment and we can configure a variety of temperature and humidity sensorsrequired by monitoring greenhouse environment according tothe requirements. (Attention: DS18B20
