摘要在机械系统中,承受扭转变形的杆件很常见,其所承受的扭矩的大小将直接影响到系统的性能,因此扭矩值的测量对于保障整个系统的运行具有非常重要的意义。
应变式扭矩传感器是当前扭矩测试中最常用的一种。本文首先介绍了应变式扭矩测试仪的工作原理,给出系统组成及设计方案。系统以实心圆轴作为敏感元件,通过在轴表面粘贴应变片来感知扭矩值的变化。供电电源采用电池和稳压芯片产生系统所需要的工作电压。信号调理部分由仪用放大器AD623以及滤波电路组成。A/D转换采用ICL7135,输出接入80C51单片机。通过软件实现电压值与扭矩值的转换。信号传输采用315M无线收发模块实现信号的无线传输。显示部分采用LED数码管的动态扫描显示。61182
毕业论文关键词 扭矩测量 应变式扭矩传感器 无线传输 单片机
毕业设计说明书(论文)外文摘要
Title Circuit Design of Strain Torque Meter
Abstract Shafts with torsional deformation are very familiar in mechanical system, and the value of the torque will directly effect the system performance. Consequently, it is of vital importance for supporting the entire system normal operation to measure the torque value.
The strain torque meter introduced in this thesis is the most common way to torque test. This thesis firstly describes the strain torque meter’s working principle, then introduces scheme design and various components. The amplifier unit uses instrumentation amplifier AD623 to amplify the DC small signal stably. A butterworth low-pass filter is designed in the filter unit. ADC takes ICL7135, and its output is input into 80C51 single chip microcomputer(SCM) to achieve the voltage to torque conversion by software design. Signal transmission uses the 315M wireless module to achieve the wireless transmission of signal. Display unit uses the dynamic scanning display of LED digital tubes.
Keywords torque test strain wireless transmission SCM
目 次
1 绪论 1
1.1 课题研究的背景及意义 1
1.2 本课题主要研究内容 3
2 基本原理及总体方案 4
2.1 基本原理 4
2.2 系统方案设计 7
3 硬件设计 9
3.1 应变电桥电路 9
3.2 放大电路 10
3.3 滤波电路 12
3.4 A/D转换电路 15
3.5 无线收发电路 18
3.6 供电电源电路 22
3.7 显示电路 23
4 软件设计 25
4.1 数据采集及无线发射部分软件设计 25
4.2 数据接收显示部分软件设计 27
5 电路调试及仿真 29
5.1 应变电桥调试 29
5.2 放大电路仿真调试 30
5.3 滤波电路调试