微型水声传感网水下传感器节点设计

doi:10.16180/j.cnki.issn1007-7820.2019.07.014

摘要/Abstract

摘要：

针对在海洋环境监测系统中水声传感网高传输速率、高可靠性、长时间工作的要求,文中设计了一种低功耗的微型水下传感器节点。设计采用较高的能量转换率和接收灵敏度的换能器T235,并且在发送单元使用变压器进行阻抗匹配以使信号功率最大化传输。接收单元采用8阶巴特沃斯带通滤波器,可以更好地滤除噪声。软件上,移植并且优化了MAC协议,减少撞包和重发的概率。测试结果显示,在小规模范围内,传输速率在19 200 bit·s ^-1时,系统的总功耗低于20 W,能达到90%以上的通信传输成功率。

关键词: 高可靠性, 低功耗, 微型传感器节点, 阻抗匹配, 8阶巴特沃斯带通滤波器, 传输成功率

Abstract:

For the high transmission rate, high reliability and long-term operation of the underwater acoustic sensor network in the marine environment monitoring system, a low-power miniature underwater sensor node was designed. A transducer T235 with a higher energy conversion rate and receiving sensitivity was designed, and a transformer was used to impedance matching at the transmitting unit to maximize signal power transmission.The receiving unit used an eighth-order Butterworth bandpass filter to better filter out noise.On the software, the MAC protocol was transplanted and optimized to reduce the probability of bump and resend. According to the test, when the transmission rate was 19 200 bit·s ^-1 in a small scale, the total power consumption of the system was less than 20 W,and the communication transmission success rate of more than 90% could be achieved.

Key words: high reliability, low power consumption, micro sensor nodes, impedance matching, eighth order butterworth bandpass filter, transmission success rate

中图分类号:

TP212.9

陈源,蔡文郁,胡毕炜. 微型水声传感网水下传感器节点设计[J]. 电子科技, 2019, 32(7): 71-75.

CHEN Yuan,CAI Wenyu,HU Biwei. Underwater Sensor Node Design of Micro Underwater Acoustic Sensor Network[J]. Electronic Science and Technology, 2019, 32(7): 71-75.

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组别	平台	速率/bit·s^-1	误差率	总功率/W
		4 800	5.4%	17.9
1	MSP430	9 600	6.3%	18.5
		19 200	9.8%	19.5
2	FPGA+DSP	19 200	<10^-3	>100