摘要
本文提供一种全数字化的单芯同轴电缆、高速、宽动态范围的双向数据传输系统,以代替传统的多芯电缆传输系统. 该系统通过一根单芯同轴电缆,可同时双向传输以下四种不同类型的信号. (1)水下载体接收到的多通道声数据、辅助传感器数据、载体水下状态信息、故障自检结果等.(2)控制水下载体姿态、工作方式和工作参数的遥控命令.(3)向水下载体传输高压电脉冲(5000V,
This paper presents a digitized bi-directional data transmission system comprising a single-lead coaxial cable. This high-speed and wide dynamic range system can replace the traditional one which contains a multiple-lead cable. With direct current power(+150 V, 2 A) provided for the wet-end, it is capable of bi-directionally transmitting the following three different types of signals at the same time, with only a single-lead coaxial cable: (1) Multi-channel acoustic data, auxiliary sensor data, underwater status information and fault testing results, etc. (2) Telecontrol command data which control the posture, operating mode and operating parameters of the wet-end equipment. (3) High-voltage pulse(5000 V, 1 A) transmitted to the wet-end. The system is composed of data acquisition devices, data couplers, digital controllers, modulators, demodulators and a single-lead coaxial transmission cable. The mixed technical scheme of frequency-sharing plus time-sharing is employed[1]. The 2PSK phase-modulation method is used to modulate acoustic data, auxiliary sensor data (including terrestrial magnetism, inclination, pressure, temperature, etc.) and telecontrol command data. The carrier frequency is 15 MHz, while the quantification resolution is 12-bit and the transmission rate is 4～6Mbps. The assembling and experimentation on the system have been completed. After weak signal test, high-voltage power test, mechanical strength test and transmission code error test, it is proved that the technical scheme is feasible; the performance is stable and reliable. This system can find applications in oceanic acoustic monitoring, deep-ocean data acquisition, underwater imaging, underwater robots and various underwater probing equipment. In particular, it fits scenarios where size and weight of the transmission cable are strictly restricted.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
1993年第3期381-383,共3页
Journal of Northwestern Polytechnical University
基金
航空科学基金(90D53164)
关键词
宽动态范围
数据传输
单芯电缆
single-lead coaxial cable
high-speed
wide dynamic range
multi-functional
data transmission
