LabVIEW case structure: Making variables for inactive case invisible

 Hello,

Recently my friend gave me a situation where he need to build a case structure in LabVIEW such that the front panel display variables required in active/ selected case only.

This is actual problem that he gave me. Lets go ahead and see what I had done.

Case-1: Active variables "K" and "L"

Case-2: Active variables "h"

Case-3: Active variable "Sigma" and "F"

Lets us see the block diagram.

Case 1:

Case 2:

Case 3:

 

I have used visible property in property node for each variable in each case. Only the one need to show up is set TRUE and rest other are set FALSE.

I hope you like it.

Instrumentation Engineering Reference Books Subject wise

 MATHEMATICS

1. Grewal B S: Higher Engineering Mathematics, Khanna Publishers
2. Lipschutz S., and Lipson M.L.: Probability (Schaum's Outline Series), TMH
3. Spiegel M.R. , Lipschutz S., John J.S., and Spellman D., : Complex Variables, TMH.
4. Bhamra K. S.: Partial Differential Equations: An introductory treatment with applications, PHI
5. Dutta Debashis: Textbook of Engineering Mathematics, New Age International Publishers.
6. Kreyzig E.: Advanced Engineering Mathematics, John Wiley and Sons.
7. Potter M.C, Goldberg J.L and Aboufadel E.F.: Advanced Engineering Mathematics, OUP.
8. Ramana B.V.: Higher Engineering Mathematics, TMH. 

DIGITAL ELECTRONICS

1. Morries Mano- Digital Logic Design- PHI
2. R.P.Jain—Modern Digital Electronics, 2/e , Mc Graw Hill
3. H.Taub & D.Shilling, Digital Integrated Electronics- Mc Graw Hill
4. Tocci, Widmer, Moss- Digital Systems,9/e- Pearson
5.  Floyed & Jain- Digital Fundamentals-Pearson

ANALOG ELECTRONICS

1. Sedra & Smith-Microelectronic Circuits- Oxford UP
2. Franco—Design with Operational Amplifiers & Analog Integrated Circuits , 3/e, McGraw Hill
3. Boylested & Nashelsky- Electronic Devices and Circuit Theory- Pearson/PHI
4. Millman & Halkias – Integrated El;ectronics, McGraw Hill.
5. Malvino—Electronic Principles , 6/e , McGraw Hill
6. Horowitz & Hill- The Art of Electronics; Cambridge University Press.
7. Gayakwad R.A -- OpAmps and Linear IC’s, PHI

CIRCUIT THEORY AND NETWORKS

1. Network Analysis, M.E.Van Valkenburg (Prentice Hall)
2. Engineering Circuit Analysis, W.H.Hayt, J.E.Kenmerly, S.M.Durbin,(TMH)
3. Network and Systems, D.Roychowdhury,(New Age International)
4. Modern Netwok Analysis, F.M.Reza & S.Seely, McGraw Hill.

ELECTRICAL MEASUREMENTS & INSTRUMENTS

1. Harris, F. K. – Electrical Measurements, Wiley.
2. Sawhney A K : A course in Electrical & Electronic Measurements & Instruments, Dhanpat Rai & Co.

Sensors and Transducers

1. D Patranabis, Sensors and Transducers, PHI, 2nd ed.
2. E. A. Doebelin, Measurement Systems: Application and Design Mc Graw Hill, New York
3. H. K. P. Neubert, Instrument Transducers, Oxford University Press, London and Calcutta 

PROCESS CONTROL

1. D. Patranabis, Principles of Process Control, TMH, New Delhi, 2nd Ed.
2. D. P. Eckman, Automatic Process control, John Wiley, New York
3. P. Harriott, Process control, Mc Graw Hill, New York
4. D. R. Coughanowr, Process Systems Analysis and Control, McGraw Hill 
5. C. D. Johnson, Process Control Instrumentation Technology, PHI
6. B. G. Liptak, Instrument Engineers Handbook, Chilton Book Co., Philadelphia

Read and Plot data from text files in LabVIEW

 Read and Plot data from text files in LabVIEW

Sometimes we may have data available in .txt file format and we need to read them. Shown below is a sample table of data for heart rates recorded from an ECG machine. The sample size is 950. We can plot the data on a graph using available features in LabVIEW by following the steps below:

 

1.      Save the text file in .lvm format.

2.      We will use “Read from Measurement File” express vi available under File IO function palette. Put the express vi on the block diagram.

3.      A new window will open.

4.      Select the text file containing data to be displayed. Also check the “Read generic text files” option under “File Format” header.

5.      Put the “Waveform graph” palette on the front panel.

6.      Wire the out of express vi to waveform graph.

7.      Run the vi. We will see data plot.

 This way we can read data saved in text file format. In the next tutorial we will se how to save the text file in TDMS format.