2006 6 6-186 -

2006 6 6-187 -

2006 6 6 Application of GPRS in Agricultural Monitoring System GAO Xiang-yang, WANG Ku, LI Mo-xue (College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China) Abstract: In the agricultural monitoring system of precision agriculture, each kind of information should be transmitted. Hence, the GPRS module Q2406B and the MCU W77E58 are used to transport the datum of agricultural monitoring system via the GPRS network of CMCC. The system is low cost and robust, very propitious to establish the large scale monitoring network. Key words: agricultural basic science; agricultural monitoring; application; precision agriculture; GPRS; W77E58-188 -

32 10 Vol.32 10 Computer Engineering 2006 5 May 2006 10003428(2006)10022902 A TP302.1 1 2 3 (1. 8350002. 835000 3. 510640) nrf24e1 /D Design of Wireless Control System in River JIANG Xinge 1, LU Chong 2, ZHANG Lin 3 (1. College of Physics and Electronic Information, Yili Normal University, Yining 835000; 2. Department of Computer Science, Yili Normal University, Yining 835000; 3. Network Center of SCUT, Guangzhou 510640) AbstractIt is requirement of automatic control with computer technology and radio communication technology on remote control. Design theory and principle are given in this paper, which are based on the core of nrf24e1 chip, together with the single-chip computer, A/D transforming machine and radio transceiver. A few extended peripheral units are used to form a remote radio control system, which is made up with control center, and on-the-spot surveying report unit. The design of single-chip computer with wireless control electronic circuit, which is based on experiment, has achieved the desired results. Key wordssingle-chip computer; Wireless communication; Control system 1 1 A/D D/A 1.1 VB 1 1 N N 1 (60172047) (03140) (1967) 2005-11-25 E-mailj_xinge@163.com 229

1.2 (NORDIC)nRF24E1nRF24E1 2.4GHz nrf2401 8051 nrf24e1-90dbm 1.9V3.6V 2A 125 nrf2401 1Mbps 0.18 CMOS nrf24e1 nrf24e1 36 QFN(6mm6mm) P0 P1 11 I/O IN0 nrf24e1 P1 SPI P1 EEPROM 512B ROM SPI EEPROM nrf24e1 4kB RAM SPI nrf24e1 nrf2401 2.4GHz ISM ()/ nrf24e1 A/D (8 ) nrf24e1 8051 2.4GHz nrf2401 2 230 4kB 512B 256B RAM ROM RAM 7/ MPU 8051 nrf24e1() SPI 4kB RAM 512B ROM 256B RAM 7/ MPU 8051 nrf2401 2.4GHz nrf2401 2.4GHz 2 8 10 A/D 2 2.1 3 nrf2401 VB / 3 2.2 nrf2401 nrf2401 144bit CRC nrf2401 Preamble ADDR PAYLOAD CRC Preamble ADDR 3240 PAYLOAD CRC CRC CRC 08 16 ADDRPAYLOAD CRC 256 nrf2401 8MHz 1Mbps nrf2401 3 8051 nrf24e1 ( 282 )

4 4.1 3 (1) (2) (3) 3 1 202 46.54% 105 24.19% 127 29.27% 434 100% 1 ITIL (1) (2) (3) IT (4) 5 3 3 ITIL 1,. [J]. :, 1989. 4.2 2,. [J]., 2002, 14(3). 3,. COBITITILISO/IEC17799 PRINCE2 2005 1 IT [EB/OL]., http://www.ccidtraining. 12 2005 Com, 1999. 4 15 434 4,,. IT : [M]. :, 2004. 1 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ( 230 ), 2003. 1. [J]. 5. Visual Basic 5.0 [M]. :, 1995, 10(2)., 1998. 2. PIC [M]. : 6. [M]. :, 2003., 1998. 7. [M]. :, 2004. 3. [M]. :, 8. [M]. : 1991., 1999. 4. &DSP IC [M]. : 282

28 4 Vol.28 No.4 2006 4 Infrared Technology April 2006 450007 AT89C2051 TP722.5 A 1001-8891(2006)04-0224-03 The Application of Infrared Remote-control on Energy-saving and the Wireless Operating System WANG Wei-shengZHENG Xiao-zhen (HeNan University of TechnologyHenan Zhengzhou 450007China) AbstractAn remote-control system of the based on AT89C2051 micro-controller was introduced. Through exploring the encoding rules of nearly 100 remote-controller signalsthe encoding methods of the different remote-controllers is found, this method uses the remote-controller of the electrical appliance itself to switch off the power supply, and achieve the function of energy-saving and the wireless operating as well. Key wordsinfrared remote-controlenergy savingmicro-controllerdemodulation CECP 15 W30 W 100 150 2005-10-23 1979 224 1 1

28 4 Vol.28 No.4 2006 4 April 2006 1 Fig.1 Design principle of the scheme 1, 2.1 TTL HS0038 3 HS0038 35 m TTLCOMS HS0038 38 khz, 26 µs TTL 5 V 2 Fig.2 Design principle of the scheme 2 3 HS0038 Fig.3 The appearance picture of HS0038 infrared receiving head 2 1 AT89C2051 HS0038 5 V 2 AT89C2051 3 4 EEPROM 5 1 2 3 4 Fig.4 The Circuit connection of infrared receiving head 4 HS0038 5 V 2.2 JIM 225

28 4 Vol.28 No.4 2006 4 Infrared Technology April 2006 JIMJIM 3010 14 22 ms25 ms 1.5 ms1.8 ms 1:1 750 µs900 µs 100 µs 010 2, 0 1 01 2 1 0 1 2 2 TheB PreB VIB VIB PreB TheB VIB1 2 IDB VIB1 IDB1, 0,1 DATA/TheBPreB IDB 2 VIB1IDB 0 10 1 ms 900 µs 2, IDB 25 2.5 ms, 226 1 2 2, 5 Fig.5 Flow chart of infrared signal decodeing 3 [1]. [M]. :. 2002. [2]. [M]. :. 2001. [3] Muhammad H.Rashid. Microelectronic Circuits: Analysis and Design[M]. :. 2002. [4]. [M]. :. 2001.

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Design and Realization of the Code Lock Controlled by Infrared Based on Single Chip 210003 Abstract: This paper designed the code lock controlled by infrared ray based on single chip. At the same time, we also give a brief introduction of the principle of the code lock. It has such properties as good safety and performance, cheapness, simple structure and so on. Key words: Single chip Infrared Code lock Remote control 1 2 MCS-51 MCS-51 1 850~900nm 1 2 1

ATMEL AT89C2051 4060 0038B TTL 0038B, 20 N? N? 20 Y 16 Y 2 0038B 4 15 1.., 3 1995. 2.. 1, 2005,13. 0.25ms 12 0.5ms 1 0.25ms 14 1ms 0 30 = 2005 FX-1 16 50 = 2005 8~16ms 2 2 FX-2 70 = 2006 100 = 2005~2006

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