10.000 bytes
By Cor van Rij
10.000 Bytes exactly a chance of, well I guess, 1 in 10.000 :-). This is a project I am doing for my work. The final outcome is to build a completely automated production line. First step is to build several machines that can test the finished product based on specifications out of a central database.
Specifications:
- Measure resistance up to 65kOhm with an accuracy of 1 ohm (implemented)
- Measure isolation resistance up to 500 Megaohm (!) with an accuracy of 2Mohm with a test voltage of only 10 Volts => currents of 20nA (implemented)
- 2*16 character LCD interface (implemented)
- 3*4 keypad (implemented)
- Speaker for audible feedback (implemented)
- External powersupply for higher noise immunity (implemented, duh!)
- Ambient temperature measurement via a Pt1000 (implemented)
- RS-232 interface to PC for debugging
In the next phase (on which I am working right now) the system will be hooked up to an 3-axis XYZ-machine. This XYZ-machine will be equipped with a tailor-made head for measuring the products. The system will also be hooked up to the central database via CAN 2.0 network. Specifications are as follows:
- CAN2.0 interface
- Server with MySQL database (MYIsm storage engine)
- Apache web-server (HTML, CSS, PHP) for entering product specifications and generating reports.
- Second RS-232 interface for controlling XYZ machine
- Develop communication protocol on top of CAN bus
- First version of PCB (ordered)
Have fun
Cor
Literature:
- Lot's but can't show it :-)
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