They called me back in 2010 and said that they had the best metal detector portal in the world but the worst software. Now they are very proud to show their software at trade shows. An eXpress / Xbase++ app communicates with 2 (two) microprocessors on a PC board at the top of the portal (via IP network). AsiNet socket functions are used for the communication. eXpress++ is used for all the dialogs and the main screen (shown here).
DCRMCHART is used for the graphs and charts.
Everything has to work in real time so the software has to be fast enough to capture the electric field information while a person is walking through the arch. The most difficult part of this application was the automatic calibration system that runs in another thread and adjusts the pots and dacs during idle times. The old software calibration required shutting down the system 4 times per day. This became a big problem for businesses that had hundreds of employees going through the portal all day long.
This system is used in jewelry stores, gold mines, etc. It can even detect if a person has swallowed a piece of metal. It works on a system of capturing a profile of each employee and how their body affects the electric field.
This profile is then saved in a database and compared against the electric field reading each time they walk through the portal. There are lots of reports and other graphs too, such as deviation reports and a scrolling graph that shows the electric field in real time and saves all the data to a database to be reviewed later.
It also syncs with another eXpress++ application that captures a photo of a person walking through the arch. This is done in another app because it needs to run on another processor so as not to slow down the main program.
It uses several activex controls including RmChart, VideoCapx and PlayGif.
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