论文总字数：10696字

摘 要

目前国内多数高校大学物理实验课程中大多数实验项目仍然采用传统的基于人工测量的实验仪器，自动化程度不高，测量技术与手段相对落后。为提高测量的自动化程度，提高实验结果的精确度，本作品利用LABVIEW软件技术并配合数据采集卡、各类传感器以及工控终端等硬件，组成了一套高度自动化的测量平台。该测量平台具有三个显著优点：1.图形化的显示界面，实验过程清晰直观，可以实时观察到所测物理量变化情况；2.触摸式操作大大简化了实验操作，提高了实验的便捷性；3.该平台测量稳定性好,极大的减小了实验误差，能充分满足高等院校物理实验的要求。目前，我们已经成功的将空气比热容实验、固体导热系数和比热容实验、杨氏模量实验植入到该平台上进行了实验的测定。

关键词：虚拟仪器、实验平台、自动化测量、高精度

Designing and Development of Physical Experiment Platform Based on Virtual Instrument

abstract

At present, most of universities still use traditional experimental instruments based on manual measurement to do many physical experiments. It’s degree of automation is not high, and the technologies and methods of measurement are relatively backward.In order to improve the automatic degree and the accuracy of the experimental results, this paper uses LABVIEW software technology as well as the data acquisition card, many kinds of sensors and other hardware to form a highly automated measurement platform. The measurement platform has three significant advantages: 1. Graphical display can make the experimental process as well as the measured physical changes more clear and real-time; 2. The touch operation greatly simplifies the experimental operation and improve the convenience of the experiments; 3. The platform measurement is quite stable. It can greatly reduce the experimental error and fully meet the requirements of physical experiments in colleges and universities. At present, we have successfully transformed the experiment of specific heat of air, the test of solid thermal conductivity and specific heat capacity, the experiment of Young's modulus to the platform.

Key words:virtual Instrument; experiment platform; automated measurement; high precision

目 录

摘 要……………………………………………………………………………………………I

ABSTRACT………………………………………………………………………………………II

第一章 物理实验测量平台介绍…………………………………………………………1

1.1 数据采集卡……………………………………………………………………………1

1.2 WIN CE工控终端………………………………………………………………………2

第二章 在实验测量平台上成功运作的三个实验……………………………………3

2.1空气比热容测定实验…………………………………………………………………3

2.1.1实验的原理介绍…………………………………………………………………3

2.1.2实验所需的硬件…………………………………………………………………4

2.1.3完成实验所需的软件载体………………………………………………………6

2.1.4实验的过程判断与控制部分……………………………………………………7

2.1.5实验的测量结果与说明…………………………………………………………9

2.2 固体导热系数和比热测定实验………………………………………………………10

2.2.1实验的原理介绍…………………………………………………………………10

2.2.2实验所需的硬件…………………………………………………………………11

2.2.3完成实验所需的软件载体………………………………………………………12

2.2.4实验的测量结果与说明…………………………………………………………14

2.3 杨氏模量测定实验……………………………………………………………………14

2.3.1实验的原理介绍…………………………………………………………………14

2.3.2实验所需的硬件…………………………………………………………………15

2.3.3完成实验所需的软件载体………………………………………………………16

2.3.4实验的测量结果与说明…………………………………………………………17

参考文献………………………………………………………………………………………18

第一章 物理实验测量平台介绍

本作品在硬件方面使用了数据采集卡和工控终端这些通用先进仪器，简化了每个实验数据的采集和处理。软件方面，利用LabVIEW软件编写程序的前面板，将实验所需的仪器参数输入软件操作界面，从而可以将实验测得量在工控终端上以图形方式直观而形象的显示出来。

1.1数据采集卡

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