一种低频远程水下遥控平台的设计
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摘要
介绍了一种低频远程水下遥控平台的设计方法,该遥控平台由水下设备与水面设备2部分组成,具有水声信号编解码、调制解调功能。遥控平台工作频段为2～4 kHz,发射声源级可达190 dB以上,采用直扩系统三重正交编码技术和CPM调制技术,通过实时信道匹配可有效对抗声学多途效应,通信速率可达到16 bps,通过海上实测可靠通讯距离可达到60 km。水下设备采用值守模式,功耗低,系统在休眠状态下功耗约为50 mW,在接收状态下功耗约为2 W,发射时功耗约为8 W。该水下遥控平台操作简易、工作稳定可靠,可以满足远程(50 km以上)低速率水声通讯需要。通过后期功能扩展,该水下遥控平台可用于实现远程水声遥控、远程水声测距、远程水下小数据量数据传输等功能。
In this paper, a design method of low frequency remote underwater remote control platform, the remote control platform consists of two parts, both the surface and underwater devices, with functions of underwater acoustic signal decoding, modulation, demodulation, frequency of 2～4 kHz, minimum emission source level can reach more than 190 dB, the triple orthogonal spread spectrum system coding technology and CPM modulation, with the channel matching can be effective against acoustic directional effect and communication rate can reach 16 bps, through the sea measured validating the communication distance can be up to 60 km. The underwater equipment adopts the on-duty mode with low power consumption. The power consumption of the system is about 50 mW in the dormant state, 2 W in the receiving state and 8 W in the transmitting state, experiments validate the work platform is stable and reliable, which can meet the long-distance(over 50 km) low speed underwater acoustic communication needs. Through later function expansion, The underwater remote control platform can be used for remote control of underwater sound, ranging of underwater sound, data transmission of small amount of underwater data and other functions.
In this paper, a design method of low frequency remote underwater remote control platform, the remote control platform consists of two parts, both the surface and underwater devices, with functions of underwater acoustic signal decoding, modulation, demodulation, frequency of 2～4 kHz, minimum emission source level can reach more than 190 dB, the triple orthogonal spread spectrum system coding technology and CPM modulation, with the channel matching can be effective against acoustic directional effect and communication rate can reach 16 bps, through the sea measured validating the communication distance can be up to 60 km. The underwater equipment adopts the on-duty mode with low power consumption. The power consumption of the system is about 50 mW in the dormant state, 2 W in the receiving state and 8 W in the transmitting state, experiments validate the work platform is stable and reliable, which can meet the long-distance(over 50 km) low speed underwater acoustic communication needs. Through later function expansion, The underwater remote control platform can be used for remote control of underwater sound, ranging of underwater sound, data transmission of small amount of underwater data and other functions.
引文
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[2] 戴荣涛,王青春.现代水声通信技术的发展及应用[J].科技广场,2008(8):241-242.
[3] 许肖梅.水声通信与水声网络的发展与应用[J].声学技术,2009,28(6):811-816.
[4] 戴善溪,张效民,彭勃.一种水声通信编码器的设计[J].电子测量技术,2009,32(8):74-76.
[5] 郭继杰.水声数字通信系统的仿真[J].海洋技术,2001,20(4):57-59.
[6] 刘岩,丁大伟.基于DSP-FPGA的多轴运动控制系统设计[J].制造业自动化,2012,34(4):23-26.
[7] 刘伯胜,雷家煜.水声学原理[M].哈尔滨:哈尔滨工程大学出版社,2008.
[8] 窦长江.直接序列扩频信号的产生原理和实现方法[J].国外电子测量技术,2000,19(3):12-14.
[9] 伊锦旺,朱逸,王贤凌,等.基于Chirp-BOK扩频的水声通信系统[J].厦门理工学院学报,2018,26(1):70-75.
[10] 王清波.非线性功放条件下的恒包络OFDM系统性能[J].电信科学,2016,32(9):120-124.
[11] 刘大利,张剑波,颜恒平,等.主动声纳恒包络波形设计及其性能分析[J].应用声学,2016,35(6):553-558.
[12] 黄舒曼,杨春兰.基于连续相位调制的格状编码调制技术(TCM-CPM)研究[J].舰船电子工程,2017,37(3):56-60.
[13] 甘梓兴,谢跃雷,农茜雯.双选信道下的CPM-FMT联合调制[J].电讯技术,2018,58(10):1195-1200.
[14] 普湛清,张阳,王巍,等.远程水声扩频通信时变多普勒估计与码片同步联合处理算法[J].声学技术,2018,37(1):18-24.
[15] 李伟,张真,吕路静.基于Matlab的CDMA RAKE接收机性能仿真[J].现代电子技术,2015,38(5):80-82,86.