[西门子载波机.docVIP

摘 要 低压电力线载波通信技术是利用现有的电力线作为信号传输信道来实现一对一、 一 对多或多对多的通信技术。在本设计中主要实现主从通信，为交通信号灯系统进行相关 数据的传送。本设计采用青岛东软的电力线载波扩频通信芯片 PLCI36-III-E 来设计电力 线载波模块。在本设计中，采用的调制方式是二进制频移键控（BFSK）方式，并将调 制后的信号进行直接序列扩频以增强其抗干扰性。本设计还对其他的数字调制方式进行 了简单的介绍，通过比较分析选择 BFSK 和直序扩频方式实现信息的调制。 本设计是基于 PLCI36-III-E 的电力线载波模块，其硬件部分包括载波耦合电路、信 号发送电路（信号功率放大电路和输出功率控制电路） 、滤波接收单元（接收滤波电路 和解调电路）等。在完成本设计硬件部分的理论分析后，进行相关的测试，并对测试结 果做进一步的分析。 关键字：低压电力线载波通信； 二进制频移键控； 直接序列扩频； 电力线载波模块硬件电路 I 武汉科技大学本科毕业设计 Abstract Low-voltage power line carrier communication technology is the use of the existing power line as a signal transmission channel to achieve one to one, many or many to many communication technologies. Achieved in the design of the main master-slave communication, the traffic signal system data transmission. This design uses Power Line Carrier Qingdao Neusoft spread spectrum communication chip PLCI36-III-E to design the power line carrier module. In this design, the use of the modulation is binary frequency shift keying (BFSK) method, and modulated direct sequence spread spectrum signal to enhance its anti-interference. The design also for other digital modulation methods were brief, comparative analysis of selection methods BFSK and direct sequence spread spectrum modulation to achieve information. The design is based on the PLCI36-III-E of the power line carrier module, the hardware including the carrier coupling circuit, the signal transmission circuit (signal power amplifier and output power control circuit), the filter receiving unit (receiving filter circuit and demodulation circuit) and so on. Upon completion of the design of the hardware part of the theory analysis, the relevant tests, and test results for further analysis. Keywords: Low voltage power line carrier communication; Binary frequency shift keying; Direct sequence spread spectrum; Power line carrier module hardware 1 绪论低压电力线载波通信是利用低压配电线（380/220V 用户线）作为信息传输媒介， 通过载波方式将模拟或数字信号进行语音或数据传输的一种特殊通信方式。[1]电力网作 为电能输送的专用网络，是国家基础网络之一。其网络的建设质量、机械强度、安全经 济技术指标等都是经过反复论证合