范文编号:JD860 附开题报告,任务书,外文翻译,范文字数:18156,页数:34 摘要:随着电子技术的发展,单片机以其体积小、功能强、功耗低的特点在仪器中应用广泛,而近年来LED数码显示器以它优良的性价比使之应用范围日益扩大,越来越多的电子设备的显示装置在使用它。我们本着实用、可靠、安全、便利及经济等原则,设计开发了基于单片机8051的脉象信息采集处理电路:对从传感器获取的脉象信号进行调理,确保所获取的脉象信号质量及幅度。利用ADC0809设计了模数转换电路,利用单片机控制其对脉象信号进行模数转换;将脉象信号数据其送入LED进行实时显示。在单片机与计算机通信过程中,由于单片机的串行接口输出的是TTL电平,本文设计了通用的RS232电平转换电路对其进行电平转换,可以实现两种不同电平间的数据传输。该系统具有数据采集、数据处理、通信、抗干扰、实时显示等性能,使其对脉搏、血压检测达到自能化,它具有体积小精度高、反应速度快和稳定性好的特点。这种装置具有一定的应用价值与现实意义。 The Design of Pulse Signal Collection Based on MCU Abstract:With the development of electronic technique, MCU general app1ies to the instrument field owing to the small volume,the strong function,the low power .And because of eximious cost performance the applications of LED display is expanding day by day in recent years, more and more electronic equipment in the display device to use it.According to the principle of practical, reliable, safety, facility and economic, we designed and researched the project of pulse signal collection apparatus base on 8051: Conditioning the pulse signal from the sensor, ensuring the quality and range of the obtained pulse signal. It designs simulate switching circuit using ADC0809 and controls A/D conversion using MCU, and then the pulse signal is sent into LED. Because MCU output TTL electricity,we designed a common RS232 electrical level conversion circuit in the communication course of MCU and computer, the conversion circult can transmit the data between the RS232 and TTL electricity. The system has data acquisition, data processing, communications, anti-interference, real-time display performance, and make it pulse, blood pressure testing to achieve intelligent, and it has a small ,high precision, fast response and good stability characteristics. The device has some important application value and practical significance.
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