超音波油量测量仪的设计.docxVIP

STYLEREF 标题 1 附录2 源代码 PAGE PAGE III 超音波油量测量仪的设计 摘 要 由于超声波传播不易受到干扰，能量消耗较慢，在介质中传播的距离较长。因此，超声波常用于距离测量，如油量测量仪、液位测量仪等，都可以通过超声波来实现。本系统的设计主要包括两部分，即硬件电路和软件程序。硬件电路主要包括单片机电路、发射电路、接收电路、显示电路、温度补偿模块和电源电路，另外还有复位电路和LED控制电路等。本文采用以AT89C51单片机为核心的低成本、高精度、微型化数字显示超声波油量测量仪的硬件电路。整个电路采用模块化设计，由信号发射和接收、供电、油量测量、显示等模块组成。 关键词：AT89C51；超声波；油量测量仪 ABSTRACT In air medium, the ultrasonic ranging sensor because of its good performance, low cost, easy to use, in the robot positioning system, vehicle automatic navigation, vehicle safety driving assistant system, urban traffic management and monitoring system for highway management, as well as the river, the well and the exploration of the warehouse and material level are used.Due to the ultrasonic propagation is not easy to interference, energy consumption slow, in the medium transmission distance is farther, so ultrasonic often used for distance measurement, such as range finder and level measurement instrument can be done by ultrasound.The design of this system mainly includes two parts, namely, the hardware circuit and software program.Hardware circuit mainly including microcontroller circuit, transmitting circuit, receiving circuit, display circuit and power supply circuit, and reset circuit and LED control circuit, etc.Based on the AT89C51 single-chip microcomputer as the core of low cost, high precision, miniaturization, digital display, the hardware of the ultrasonic range finder.The whole circuit USES modular design, the signal transmitting and receiving, power supply, such as temperature measurement, display modules. Key words: AT89C51；Ultrasound;Range finder 目 录 TOC \o 1-3 \h \z \u 第1章 绪论 1 1.1研究背景 1 1.2研究意义 1 1.3国内外研究现状 2 第2章 超声波油量测量的原理及误差分析 4 2.1 超声波油量测量的原理 4 2.2 超声波油量测量误差分析 5 第3章 系统硬件设计 7 3.1 发射电路设计 7 3.1.1发射电路设计方案 8 3.1.2发射电路常用方案 8 3.2 接收电路设计 9 3.3单片机显示电路设计 11 3.3.1 LCD显示部分 13 3.3.2报警部分 14 3.4温度补偿模块 14 第4章 软件设计和测量结果分析 16 4.1系统软件设计 16 4.2外部中断子程序 19 4.3定时器中断子程序 21 总结