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TAs: Deniz Aktas, Emine Bardakci |
Experiment #2 SENSORS AND DATA ACQUISITOIN
Introduction
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
Strain Sensors
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Figure 1. Strain Sensor
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Figure 4: Pancake, compression load cell
Experiment Details
Procedure:
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:
Step 1: Make sure that the NI setup is open from the ON/OFF switch as it found at the back of the device.
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.
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:
Step 1: Make sure that the NI setup is open from the ON/OFF switch as it found at the back of the device.
Step 2: Make sure that you press the open button on the device.
Report Requirements
The report for Procedure 1 is expected to include:
· All the screenshots of Block Diagram and Front Panel
· Sensor output screenshot when no external force is applied.
· Sensor output when bent.
· Sensor outputs for Gauge factor 0.3 and 30. Note the changes that you noticed.
The report for Procedure 2 is expected to include
· Output graph without making any changes.
· Change the force unit to N. With no load on the sensor, enter the value of Voltage located in the schematic. Enter the Reference Force as 50N and enter the value of the Reference Voltage.Responsible TAs:
Deniz Aktaş, denizaktas20@ku.edu.tr
Emine Bardakçı, ebardakci20@ku.edu.tr