How to use peak detection in labview to detect peaks from data acquisition information

[chrisharris]

Hi

I am a university engineering student who is working in a team to develop a coin detector, its purpose is to recognize different coinage and detect fakes.

For this we are using LabVIEW 8.5.1. I am relatively new to labview and have had no experience of using to before. We are trying to integrate four voltage signals produced by an electromagnet, straingauge, optical sensor and a proximity sensor. We have already developed signal conditioning for these tests and now wish to put them into labview.

Our plan is to use peak detection on each of the tests so that labview can detect peaks which correspond to different coin types, provided they meet set criteria for each coin. Then to combine these either using logic or mathscript to produce a Boolean output for each coin.

One of our advisors helped us develop a peak detection program for a simple simulated sine wave however we are struggling to adapt this for data acquisition information and itegrate it with mathscript and to be honest it does not make much sense. I have attached the program below. Thanks in advance for your assistance. 

[mishkin]

Chris,

Here are several ways to help  you get started with peak detection:

1. On your functions palette, you can search for "peak detect" and you'll find several different variations of VIs that will do peak detection.

2. You may also want to take a look at this tutorial: Peak Detection Using LabVIEW and Measurement Studio

3. There's an example in the example finder called "Peak detection and display" that will probably be useful. 

Hope this helps, 

[chrisharris]

Thanks I will give it a try and get back if I have any more difficulties.