Experiment #2 SENSORS AND DATA ACQUISITOIN

 Objective:

This lab introduces students to Strain Sensors and Load Cells and by using data acquisition and processing with NI ELVIS III. Then, students can build electronic set-ups on the protoboard, drive the sensors, and read sensor output with the NI ELVIS III suite of SFP instruments. In addition, the students will learn how to calibrate a read-out unit, reduce noise in electro-mechanic sensor system, process data with a VLSI system and.

1. Theory Overview

1. Strain Sensors

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Figure 1. Strain Sensor

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Figure 4: Pancake, compression load cell

2. Pre-Lab Quiz

• Quiz Date: xxxxxx

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3. Experimental Procedure

Before programming with the NI ELVIS III, you must first create an NI ELVIS III project. With an NI ELVIS III project, you can group together all the files relevant to your application and run VIs on the NI ELVIS III.

Safety

Be aware of powering the NI board and be aware of not creating any short circuit on the board (connecting ground and power levels (+5V, 3.3V) is not recommended, and may create some damage on the electronic components, be careful about that.)

Hardware/Software Equipment Check

Prior to starting the lab, make sure the equipment is working by conducting the following steps:

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Step 2:   Make sure that you press the open button on the device.

3. Data Collection

Part 1 Strain Sensors

Complete the following steps to create an NI ELVIS III project by using the NI ELVIS III Project template.

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o   All leds light when applied force is greater than 30N.

5. Post-Lab Report

• Due Date: xxxxxx

The report for Procedure 1 is expected to include:

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