基于USB接口温度传感器.doc

基于USB接口的温度传感器 摘要 温度是工程领域中主要的被控参数之一，在许多需要对温度进行监控和分析的场合需要一种精度和自动化水平高、应用范围管的温度采集手段。针对这一需求，本文设计了低成本、高可靠性、高速度的基于USB接口的温度采集系统，可以将温度传感器采集来的数据经放大转换处理后，通过USB接口传送到主机系统，使客户应用程序通过驱动程序得到数据，并根据需要对数据进行处理。本文阐述了基于USB接口，利用AT89C52单片机和PDIUSBD12芯片以及DS18B20数字输出型温度传感器实现温度采集系统的设计方案，并给出了具体实现方案，包括基于USB接口的温度传感器的硬件设计和应用程序开发等关键技术硬件设计部分主要介绍了USB控制器的选择和硬件的具体设计方案，给出了主要部分的电路原理图。按照温度传感器的选用原则，选用了低成本，高精度的DS18B20数字输出型温度传感器。应用程序部分分析给出了软件流程、、编程实现及与USB设备的通信方法。本论文完成了基于USB接口的温度传感器的设计，实现了基本的温度数据采集和传输功能。通过本研究，使我对USB技术内核有了更深刻的理解，积累了丰富的经验，为今后系统应用奠定了坚实基础。 关键词： Based on the USB interface temperature sensor Abstract Temperature field of the project is one of main parameters are needed in many temperature monitoring and analysis on the occasion to a precision and high automation level, application range of tube temperature gathering. In this paper the design demand, low cost, high reliability, high speed and based on the USB interface temperature gathering system, can be collected temperature sensor data processing, the amplification conversion via USB interface to host system, make customer application through the drivers get data, and according to the need of data processing.In this paper, based on the USB interface chip microcontroller and PDIUSBD12 by AT89C52 as temperature sensor DS18B20 digital output type of temperature gathering design scheme of the system is given, and the concrete implementation scheme based on the USB interface, including the temperature sensor of hardware design, development and key technology.The hardware design part mainly introduces the hardware and choose the USB controller design scheme of concrete is presented, the main part of the circuit principle diagram. According to the principle of selection of the temperature sensor, choose the low cost, high temperature sensor DS18B20 digital output. Application software process part analysis is presented, and the programming and the communication with USB devices.This paper based on the USB interface of completion of t