广州大学电子课程设计论文_光学微重测量

1、电子课程设计：光学微重测量摘要生活中我们需要知道很多东西的重量才能知道它的价值，如多少克药品，多少克黄金。但大物体的重量容易检测，而如何去测量一些微小的物体的重量呢。在工业生产中，时常需要测量一些贵重物品的重量，但一些贵重物品的重量又比较轻。那么我们应该怎样测量微小物品的重量呢，下面我们就以光纤传输原理，设计一个光学微重测量。在光学测量微重时关键是测量变化的光强，本设计采用AT89C51单片机组成光照强度测量显示系统，可以实现对光强的测量和显示。光强传感器采用光敏三极管，对光照强度进行实时采样。设计传感器放大电路，将太阳的强弱转变为电信号，并将强度值显示出来。将光敏三极管接入电路，受光照度不同

2、时光敏三极管的集电极电流发生相应的变化，将采集的信号接入运算放大电路，再输入到ADC转换器，将模拟信号转换成数字信号输入单片机中，通过数码显示器显示出在不同光照强度下电路电压的变化值。关键词： 89C51单片机、 A/D转换器、 数码管AbstractIn life, we need to know a lot of things weight to know its value, such as how many grams of the drug, how many grams of gold. But the weight of the object is easy to detect,

3、 and how to measure the tiny object weight. In industrial production, often need to measure the weight of some valuables, but some valuables and lighter weight. So how should we measure the small weight of the goods, we have the following to the principle of the optical fiber transmission, design of

4、 a optical micro gravity surveying.In the optical measurement of micro heavy when the key is the change of light intensity measurement, this design uses the AT89C51 SCM light intensitymeasurement display system, can realize the measurement of the lig

5、ht intensityand display. Light intensity sensor using photosensitive triode, the light intensityof real-time sampling. Amplifying circuit design of sensor, the change of thestrength of the sun into electrical signals, and the strength&

6、#160;values are displayed.The photosensitive triode access circuit, by the illumination of different timesensitive transistor collector current changes, the signal acquisition accessoperation amplifier circuit, and then input

7、 to the ADC converter, the analog signalis converted into digital signal input microcontroller, through the digital displayshows in different light change circuit voltage strength the value of the.Keywords: 89C51 MCU, A/D converters, d

8、igital tube目 录第一章1.1摘要·························11.2单片机STC89CC51RC简介 ················· 41.3

9、光纤接收光强随光纤端面与反射镜距离d变化原理·····4第二章 硬件设计方案 ···················62.1 数码管 ·················· 62.2

10、 A/D转换器 ·················· 72.3电路的设计 ················ 8 第三章软件设计方案 ··········

11、3;······ 9 3.1程序流程图 ·····················9 3.2 程序设计 ··········· ·······

12、83; 9 第四章 应用系统实现··················10 4.1硬件连接 ··················· 10 4.2程序下载 ······

13、83;···········11总结 ··························· 11致谢 ·········

14、3;················ 11附录1 程序清单 ··················· ···12 附录2实物图 ········

15、;··········· ··13参考文献 ························· 131.2单片机STC89C51简介2.3电路的设计第3章 硬件设计方案3.1设计流程图总原理图3.2程序设计本例使用Kei

16、l uVision2进行C语言编译。总结： 在本次课程设计中，通过在小组分工合作的方式，把课程设计完成。小组成员一起参与讨论，研究，又互帮互助，增强了同学之间的友谊。课程设计还存在着光线测量的敏感度和微重测量的转换问题，希望能更加优化设计。附件1 最小系统仿真程序： #include<reg52.h> #define uchar unsigned char #define uint unsigned int uchar code LEDData= 0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f ; sbit OE=P10; sbit EOC=P11; sbit ST=P12; sbit CLK=P13; void DelayMS(uint ms) uchar i; while(ms-) for(i=0;i<120;i+); void Display_Result(uchar d) P2=0x08; P0=LEDDatad%10; DelayMS(5);