The acquisition and treatment of strain data play an important role in various engineering applications, involving experimental stress analysis on a surface. Its operationalization, however, requires care and equipment that should ensure accuracy in data acquisition and ease of sampling. Deformation data acquisition systems are critical in these cases but still costly when it comes to applications in academic laboratories. This work shows he development of a portable data acquisition system for strain reading using electrical extensometry that can be used to acquire experimental strain data. The developed system has low cost and portability, being suitable to attend data acquisition in remote places. For its development an Arduino UNO R3 board was used in conjunction with an ADS1115 analog-to-digital converter. The converter is required to increase the analog/digital conversion accuracy of the Arduino board and to read electrical voltages in the μV range. In addition, an LCD display was added to the system to show the acquired data instantly. This way, the system does not require the use of a computer to function and can be easily transported. For its measurement, an experiment was carried out with strain gauges glued on the surface of an aluminum beam and connected in a Wheatstone bridge circuit. Also, a numerical model was developed using the LISA finite element program. After testing and comparing experimental, analytical and numerical results, it can be stated that the system was able to acquire data with great precision, reaching its objectives.

应变数据的获取和处理在各种工程应用中发挥着重要作用，包括表面上的实验应力分析。然而，它的操作需要谨慎和设备，以确保数据采集的准确性和采样的便利性。变形数据采集系统在这些情况下至关重要，但在学术实验室的应用中仍然很昂贵。这项工作表明他开发了一种便携式数据采集系统，用于使用电引伸计进行应变读数，该系统可用于采集实验应变数据。所开发的系统成本低，携带方便，适合偏远地区进行数据采集。在开发过程中，Arduino UNO R3 板与 ADS1115 模数转换器结合使用。需要转换器来提高 Arduino 板的模拟/数字转换精度并读取 μV 范围内的电压。此外，系统中增加了一个 LCD 显示屏，可以即时显示采集的数据。这样，该系统不需要使用计算机即可运行，并且可以轻松运输。对于其测量，使用粘在铝梁表面并连接在惠斯通电桥电路中的应变计进行了实验。此外，还使用 ​​LISA 有限元程序开发了数值模型。在测试和比较实验、分析和数值结果后，可以说该系统能够非常精确地获取数据，达到了其目标。