基于超声波技术的遥控系统的设计 毕业设计.docVIP

学 号：200612020210  HEBEI POLYTECHNIC UNIVERSITY 毕业设计说明书 GRADUATE DESIGN 设计题目：基于的系统设计 ABSTRACT This study was designed based on a remote control system of ultrasonic technology. Remote control system of ultrasonic has good control of high sensitivity than conventional infrared remote control system, without azimuth alignment, etc. This system mainly consists of ultrasound and ultrasonic receiving components, in part by the command key, instruction encoding circuit, pulse code modulation circuit, drive circuit and modulated signal pulse wave detector. Receiving part by ultrasonic receiving probe, preamplifier circuit, pulse demodulation, the CPU, executive circuit. System can realize: when the command button is pressed, instruction encoding circuit will produce different pulse code instructions to signal that encode instructions signal, and these have coding modulation circuit, signals through pulse coding modulation, into a modulated signal pulses, by driving circuit is driven out of ultrasonic wave detector. When the ultrasonic receiving probe to receive ultrasonic signal, it will change for mechanical signal ultrasonic signal is very weak signal, because, after preamplifier amplifier to certain scope, into the pulse modem demodulation signal demodulation, the instruction processed by the CPU, according to the instruction execution of signal driven circuit. This paper mainly describes ultrasonic control system structure, work principle, the hardware circuit design and software design, hardware circuit and software design of the connection of the chart. Keywords: Ultrasonic, Remote, SCM 目录 摘 要 I ABSTRACT II 引　言 3 第1章 绪论 4 1.1 研究背景和意义 4 1.2 超声波遥控技术的发展 5 1.3 设计方案 6 1.4 预期达到的目标 7 第2章 超声波遥控技术综述 8 2.1 超声波与遥控系统 8 2.1.1 超声波应用于遥控的基本性质 8 2.1.2 超声波的频率选择 9 2.2 超声波传感器 9 第3章 系统硬件设计 13 3.1 超声波发射电路设计 13 3.1.1 系统介绍 13 3.1.2 元件介绍 14 3.1.3 发射模块 17 3.1.4 驱动电路模块 21 3.1.5 超声波发射电路 23 3.2 接收部分硬件设计 25 3.2.1 系统介绍 25 3.2.2 元件介绍 25 3.2.3 接收模块 26 3.2.4 带通滤波电路模块 28 3.2.5 电压比较电路模块 30 第4章 系统软