基于CC3200的大棚温湿度无线控制系统设计_英文_赵成城.pdf基于CC3200的大棚温湿度无线控

文件名称: 基于CC3200的大棚温湿度无线控制系统设计_英文_赵成城.pdf

所属分类: 硬件开发

开发工具:

文件大小: 1mb

下载次数: 0

上传时间: 2019-07-16

提供者: weixin_********

下载 (1mb)

不能下载？报告错误

详细说明：基于CC3200的大棚温湿度无线控制系统设计_英文_赵成城136 Journal of measurement Science and Instrumentation Vol 9 No. 2, Jun. 2018 frequency peripheral circuit is shown in Fig.5 CONN UFL a 10 p. FLI 50 110 DNP IN -COUT CHIP ANTENNA RITT R 2. 4 G Hz filter 50gJ24 DEA202150BT1291C1 3.6nH 4 2.45G1H IND 0pFAH16M24501 RF SWITCH MM8030-2610RJ3 Fig 5 RF peripheral circuit in winter is as an example to introduce the specific 3 Software design control mode of FPGA. It is necessary to control the 3.1 FPGA specific control mode TH of the greenhouse by FPga to ensure the normal development of straw berry plants in different growth In this design, strawberry growing in greenhouse stages. The specific control mode is shown in Fig. 6. I'cmpcraturc >25 T Temperature>25℃ an Temperature80%RH Humidity >65%RH fan ON fan ON Humidity <6(%RH humidifier oN humidifier ON Fig 6 FPGA control node 3.2 FPGA 2)The FPGA outputs the starting signal (typically data flow reading I ms) with a hold time no less than 800 uS, and then The communication between fpga and dht22 releases the bus: meanwhile, the data line of the can be completed by the following three steps DHT22 becomes as an idle state. After the release of 1)DHT22 needs to wait Ior 2 s to get into the FPGa bus, DHT22 sends a response signal, which is steady state after powered on. Then the sensor starts ow level of 80 us output, followed by a high level of to measure the Th and records data. At this point, 80 us output as the response signal to notify the the data line turns to the low power mode, maintains fpga to receive data, The signal transmission is at high level, stays in input state to detect the shown in Fig. 7 external signal at any time. B)Response signal of the sensor makes the FPga (c)1994-2019ChinaAcademicJournalElectronicPublishingHouse.Allrightsreservedhttp://www.cnki.net ZHAO Cheng-cheng, et al. Design of greenhouse temperature and humidity wireless control system based on 137 to receive data, and the data bus outputs 40 bit Data format of 0: time for low level of 50 us and serially. The FPGA recognizes the 4 40 bit according high level of 26-28 us8J to the change time of high and low levels. Signal formats of the bit data“0”and“1”are Data format of"1": time for low level of 50 us and hown in Fig 8 high level of 70 us; Starting signal bus Sensor response signal Bit data“0 signal, Bit data^“I” signal VDD 70% --3(%SDA --30% GND Host signal Sensor signal 50 Fig 7 Single bus response signal timing diagram Fig.8 Signal formats of bit data“0”and“I The dht22 data flow diagram readed by fpga i the pc. cc3200 is connected with fpga. the data shown in Fig 9 collected by Th sensor is transmitted to CC3200 through FPga uart port. nitial ization Initialization Sinple link onfiguration FPGA Scnd start ign Start simple link Release bus Ncn response signal Connect wlan wailing lor sensor response sigi Responsive signal FPGA reads 40 bil data (CART) continuously Send data to pc Correct Fig 10 Workflow of CC3200 pdate temperature Alter that, the signal is sent to PC by Wi-Fi with using the secure TCP/IP protocol, so that the Th Wair(fixed nformation in greenhouse can be obtained at the PC acquisition cycle terminal, so the realtime monitoring of th in greenhouse is realized. The wireless communication Ger fixed characteristic of cc3200 overcomes the obstacle of cquisition cycle? long-distance communication, and this characteristic is also its advantage in greenhouse. Fig 10 le york flow of cc320 Fig 9 DHT22 data flow chart readed by FPGA 4 Verification of test results 3.3 CC3200 communication CC3200 is the hub of information transfer bet ween 4.1 Data fetch PC and FPGA, and all data transmission is done by The 40 bit data collected by dht22 include 16 bit CC3200 through wireless communication. First, humidity data, 16 bit temperature data and 8 bit CC3200 starts and initializes, connects the wireless check data. The experimental data are ten times of router( router) and establishes communication with the actual data, so it is necessary to transform the (c)1994-2019ChinaAcademicJournalElectronicPublishingHouse.Allrightsreservedhttp://www.cnki.net 138 Journal of measurement Science and Instrumentation VoL 9 No. 2, Jun. 2018 collected data to the actual value of temperature and means the check bit is verified correctly. This data humidity in the measured environment. For example, recording method improves the accuracy of the the collected 0 binary data are 00000010 10001000 measured data 000000010011100011000011,0000001010001000B Thich are 648D under decimal systern, so the 4.2 Conclusion verification environmental humidity is 64.8%RH; 00000001 In the TH monitoring system, when the 00111000B, which is 312D under decimal system, so temperature reaches 25 C, the FPGa opens the fan the temperature is 31.2C, check bit 11000011- Fig. 11 shows that during the cooling process, data is 00000010+10001000+00000001+00111000(16 bit transmitted by CC3200 and displayed on PC when the humidity data plus 16 bit temperature data), which distance between DhT22 and FPGA is 24 m. ee Server has been starte Receivint Area Di sply J Mex Swe to Iile Enpty display Successfull top server deceived Fros1722010.3:54452 TP:1T2.20.10.8 ForR lignt)(1) 1720.1.3:51452 Kick"红 Sending kera Sn置 Kick Gup固sg 血11 Send File 12017/12/617241:08 Fig.11 PC data It can be seen from the screenshot that the strong practicability and broad prospects fo temperature value drops from offa to nOEl, that is development sJ from25℃to22.5℃, and the humidity value is kept constant, i.e., atmospheric humidity. It References verified that DHT22 can complete the data [1] Du Y F. nRF905 & DHTll based wireless temperature & transmission in long distance, and FPGa can control humidity logger. Information Technolcgy, 2012,(1) the system in the absence of monitoring and provide a 193-195 more suitable growth environment for plant [21 Du Z N. Implementation method of the greenhouse envi- ronment monitoring system based on wireless sensor. Val 5 Conclusion ue Engineering, 2014,(34): 242-244 of remote data ac- The design of greenhouse temperature and quisition system based on NRF24L01. Automation &.In strumentation, 2011,(4):44-45 humidity monitoring system based on CC3200 with [4 Lin Z M. Design of a digital hygrometer based on DHT22 digital sensor DHT22, FPGA, CC3200 and PC has Journal of Jiamusi Univcrsity (Natural Scicncc Edition) the advantages of high measurement accuracy and 2016,34(2):223-225 high monitoring efficiency compared with the [5] Gao Z B. A digital storge temperature and humidity meas traditional temperature and hunidity measurement uring systcm. Journal of Changzhou Institutc of Technolo- d in traditional greenhouse. Moreover, the gy,2016,29(5):35-38. system can automatically take corresponding [6 Liu Z F, Li J, Li Y P, et al. Design of RF heating tem- measures according to the change of environment.so perature and humidity monitoring system based on STM32F103VBT6. Microcomputer & Its Applications that crops can grow in better environment. In 012,16:28-31 addition. the transmission mode of wireless 7 Lin T. The research and application of wi-Fi developing o- communication can give full play to the advantages of riented microcontroller Cc32c0. Suzhou: Soochow Uni long-distance transmission in this system, and has versity, 201 (c)1994-2019ChinaAcademicJournalElectronicPublishingHouse.Allrightsreservedhttp://www.cnki.net ZHAO Cheng-cheng, et al. Design of greenhouse temperature and humidity wireless control system based on 139 8 Jiangg y. Design of remote tcmpcraturc monitoring sys- the grccnhousc, Computing Tcchnology and Automa tion, tem based on ARM NUC 140. Computer Programming 9-21 Skills & Maintenance, 2014, 20: 97-98 [10 Tian Z P. Design of remote monitoring system based un 9 Chen MJ, Xiong S C. Based on the P89LPC932 microcon- CC3200. Beijing North China University of technology troller system controlling the temperature and humidity in 基于CC3200的大棚温湿度无线控制系统设计赵成城,丁海飞,刘文怡,康曦 (屮北大学电子测试技术重点实验室,山西太原C30051) 摘要:针对传统大棚测量温湿度运用温度计和湿庋计导致测量过程复杂、测量结粜不精确以炇控制系统操作繁琐的冋题,设计了基于(C320的温室大棚温湿度( temperature and humidity,TH)无线控制系统。该系统以IGA作为主控制器,通过控制DH22将温湿度信号发送((200无线模块,进而实现了数据的远距离传输以及对系统的自动搾制关键词;FPG^;CC320;DHT22;大棚温湿度;无线控制引用格式; ZHAO Cheng-cheng, DING Haifei, LIU Wei,etal. Design of greenhouse temperature and humidity wireless control system based on CC3200. Journal of measurement Science and Instrumentation,2018,9(2):134139.[doi:10.3969/j.issn.16748042.2018.02.006] (c)1994-2019ChinaAcademicJournalElectronicPublishingHouse.Allrightsreservedhttp://www.cnki.net

(系统自动生成,下载前可以参看下载内容)