Report of the Labview software

Abstract of the Labview software

The lab report is about the Labview software, whereas by using the Lab view software, measure the resistance of the thermistor, which is relative to its temperature. There are different three objectives of the lab experiment, as shown in the below section of the objective. There are eight sections of the Lab report. In the first section that is Introduction, in this section first of explained about the Labview software, then thermistor and DAC. In the first section, the 2nd points are Objective, and there is three objectives which performed in three days according to the proper requirements. In the 2nd section, the literature views the explained, in this section studies of different author for the   regarding the DAC, thermistor and the Labview is explained. The 3rd section is experimental; in this different equipment’s is used to operate these experiments. In the 4th section of the lab experiment, “results” different equations about the experiment where we find the value of resistance is explained. There are two graphs shown in the below results sections, and the graph is between the temperature and voltage and temperature and resistance. In the 5th section of report, the comparison of the literature review and the results sections explained because it discussed the different studies. In the 6th section of report “Conclusion”   summarizes all result of the report. And on the 2nd, the last section of the report is future work and recommendations about the Labview, thermistor, and DAC. And in the last section of the report, there is some references which support the studies.  

Keywords: Labview, Thermistor, DAC, Resistors, Temperature, Voltage  

Introduction of the Labview software

LABVIEW is the “Laboratory Virtual Instrument Engineering Workbench,” which is a system to design the development and platform environment for the visual programming language from National Instruments. Labview is key innovations that are also used for graphical diagrams as compared to their lines, and it also creates it's more intuitive for excellent parallel programming. Whereas Labview is used for instrument control, data acquisitions, and the automation of industrial for the variety of operating systems, which is also involved Microsoft Windows, UNIX, macOS, Linux. There are the following benefits of the Labview software;  

Future Proofed technology

Increased productivity

Third-Party Ecosystem & Hardware integration

DAC stands for “Digital to Analog Converter,” which is also known as D2A, D-to-A, D/A. In electronic, it is systems, which convert the digital signals to the Analog signals. There are different architectures of the DAC, which is suitable for the particular application that is determined through the merit figure, involving the   resolution, sampling frequency. The implementation of the reconstructor and are the DACs, which is much simpler as

compare of the ADCs, and it is also correspondingly cheaper. The digital binary code is always converted into the for Analog input that might be voltage or current. In the below figure, it presents the n-bit DAC [2].

Thermistor is the resistors that change with the temperature. The low-cost temperature sensitive for the resistor is constructed by the thermistor which is the solid semiconductor that also exhibits negative and positive temperature coefficient. The devices, which are positive temperature coefficients engineers, are mostly used in , thermistor. The high sensitivity of the thermistor is always allowed for the detection of the variations of temperature that could also not observed through the detector of resistance temperature. By increasing the temperature of the resistance detection temperature, the coefficients of the thermistor do not decrease [3].  The resistance of the thermistor is dependent on the temperature, and it is a combination of the “resistor” and “Thermal,” which is made up of by metallic oxides and pressed into the disk, bead.

There are two types of thermistor;

Negative Temperature coefficient

Positive Temperature coefficient

The figure of the thermistor is shown below in figure 3;

Objectives of the Labview software

In this lab experiment, the objective of the lab is connected to the Labview software with voltmeter and DAC. Then draw the simple circuit to check the input and output of DAC and take different values of the voltage of DAC and obtained results from voltmeter.

In Labview, build the circuit, and then connect with DAC, breadboard, resistor, and thermistor regarding circuits.

At the three different values of temperature, calculate the values of voltages then plot the graph between temperature and voltage. Also, draw the graph between the temperature and resistance and draw the trendline and write the equations.  

Literature review of the Labview software

According to the author [4] by millions of engineers, for more than 20 years, the NI Labview software is used, which also developed the sophisticated test with measurements along with also has the control applications. Whereas Labview provides different features along with the tools which are ranging from the interactive assistants, for the configuration of user-defined interfaces. The Labview software is differentiated through the graphical and general purpose of the programming language by the connection of integrated compilers, debugging tools, and the linker. The intuitive graphical programming, intuitive debugging tools, automotive performance are benefits of Labview software [4].

 According to the author [5], the type of semiconductor is Thermistor , which meant by has greater resistance as compare to conducting materials , but as compare to insulting material has lower resistance. By the degree of accuracy, the manufactures find this property, which also has the primary characteristics for the thermistor buyer interest [5].

According to the author [6], the DAC takes the digital data, which transforms it into the Analog audio signals, and also sends the Analog signal to the amplifier, which also hears the digital recording, and it is listening to the Analog signal, and it is converted by the DAC [6].

Experimental of the Labview software

There are different equipment’s which are used in this lab experiments;

Labview in PC

USB Cable

NI (National instrument)

Thermistor temperature sensor  

DMM (Digital Multimeter)

Solderless breadboard

Solder wire

Glass of ice

10K Ω resistors

Results of the Labview software

The resistances R of thermistor are the temperature could be modelled through;

Whereas  is the resistance of references temperature  , B is the constant; to find the above equation, the temperature in Kelvin must be used.  The thermistor which are used in

this lab experiment has the different values of resistances, as showing in the below graph. 

Whereas temperature as a function of the resistance yields;

The DAQ pod only measures voltage-convert, not resistance [7]. 

The value of fixed resistors can be calculated as;

According to the objective of the lab experiment; first of all, connect the Labview with the voltmeter and implement circuits;

The 2nd objective at different values of temperature the values of the voltages are shown in below table 1;

Table 1: Temperature and voltage values

Analysis

In the graph 3, it can be analysed that the value of voltage is changed according to the time. In the start, the value of voltages are low and as the time passes these voltages goes towards the limit point and adjusts itself properly. It can be seen that after some time it will become constant.

Discussion of the Labview software

In the literature view, the studies of the different authors are explained about the DAC, Thermistor, and Labview. There are many theoretical explanations about these three is explained in the above sections. And in this lab experiment measured different temperatures under the various scenarios, like room temperature, surrounding temperature by the bag of ice as well as grasping the lowing hot breath on it. Whereas resistance of the thermistor is inversely proportional to temperature, it is relatively easy to experiment, because it gives the introduction of the circuits elements, data acquisition DAC, and programming of Labview software.

Conclusions of the Labview software

Summing up all discussion, the lab report is about Labview of thermistors and the resistance. There are three objectives of the lab experiment. In this report, after the implementation of results and calculation, all these three objectives are achieved, as shown in the above section results. There are a different section of lab reports which is explained according to the requirements

Recommendations for future work of the Labview software

All the equipment must be neat and clean.

There are some recommendations about Labview;

Mitigate Cross-linking

Installing multiple Toolkit

Installing multiple drivers

References of the Labview software

[1]	A. Beckman, "The Top 4 Benefits of LabVIEW," 2019. [Online]. Available: https://www.automation.com/pdf_articles/ni/Software_Benefits_of_LabVIEW_Flyer_2017_ENG_HR.PDF.
[2]	E. Lai, "Converting analog to digital signals and vice versa," Practical Digital Signal Processing, p. 14–49, 2003.
[3]	Engr.usask, "Designing with Labview Temperature Measurement with ADC controlled by Labview," usask, 2019.
[4]	Ni.com, "Benefits of Programming Graphically in NI LabVIEW," 5 March 2019. [Online]. Available: https://www.ni.com/en-lb/innovations/white-papers/13/benefits-of-programming-graphically-in-ni-labview.html.
[5]	Omega, "What is a Thermistor, and how does it work? " 28 August 2018. [Online]. Available: https://www.omega.com/en-us/resources/thermistorhttps://www.omega.com/en-us/resources/thermistorhttps://www.omega.com/en-us/resources/thermistor.
[6]	D. A. Glaser, "Analog to Digital and Digital to Analog Conversion," Regents of the University of California, 2015. [Online]. Available: https://instrumentationlab.berkeley.edu/Lab10.
[7]	C. Briscoe , "Using LabVIEW to Measure Temperature with a Thermistor," 2009. [Online]. Available: https://zeus.phys.uconn.edu/wiki/images/LabViewThermistor.pdf.