What is the minimum sample rate you should use and why

Assignment Help Simulation in MATLAB

Reference no: EM133259372

Assignment description

Objective: Design of a data acquisition system and interface with a simulation software Eg.MATLAB ( using Raspberry or Arduino or any interface) with temperature measurement of an industrial sensor of your choice with justifying the selection.

To get accepted, the answers must be well-reasoned!

Question 1: Is the sensor you have chosen is suitable sensor for your temperature measurement range (justify your answer)?

Question 2: Name another temperature sensor for your measurement range and state the pros and cons in relation to the primary sensor you have chosen.

Calibration
The next step is to calibrate your sensor. Set a number of different temperatures (at least 10) to "Temperature in" on the system. Start at your specified min temperature and end at your specified max temperature. Make a graph (in MATLAB or Excel) showing the calibration curve and the true temperature. The calibration curve must show the set measurement temperature on the x-axis and the measured temperature from the thermocouple on the y- axis (temperature in degrees Celsius on both axes). If its RTD, you need to use the data sheet and plot the curve. The image below shows an example from Thermocouple and RTD.

Add the graph to your report (clearly show which curve is the calibration curve and which is the true temperature) and explain any differences between the curves.

Question 3: Does the sensor provide accurate temperature measurements? If not, what kind of calibration is required to compensate for the inaccuracies in the measurements?

Measuring amplifier
You will now design a measurement amplifier for your measurement system. In the next step, when the sensor signal is to be sampled and AD converted, an AD converter with the reference voltage of 3.3 or 5 volts will be used. Therefore, design your amplifier so that at your maximum temperature you get an output signal from the amplifier that is close to 3.3 volts or 5 volts (not over). Comment about the inaccuracies coming up from the amplifier.
Add your calculations for the sense amplifier to your report. Show how you have chosen the values of your resistors.
Sampling and AD conversion

Question 5: What is the minimum sample rate you should use and why?
Now choose the number of bits in your AD converter (you choose yourself, justify your choice) and calculate what resolution you get with this number of bits. Add your calculation to the report.

Question 6: What will be your maximum error due to the quantization uncertainty (in degrees Celsius)?

Suppose you have an AD converter with 5 v reference voltage and 10-bit resolution, what will be the resolution of the system? Compare it with 3.3 V reference voltage.
Add your calculations to the report. The calculations must show calculations from the entire chain, from physical value to a digital value after the AD converter.
Signal conditioning Circuit
The signal conditioning circuit must contain minimally anyone of the following.
- Wheatstone bridge with 3 wire compensation if you have chosen RTD
- Cold junction compensation either in hardware or software if you have chosen Thermocouple.

Reference no: EM133259372

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