18000-7 RFID, RTLS Tag

18000-7 RFID, RTLS Tag

This tag combined the functionality of an RFID tag operating on 433MHz under 18000-7 protocol and a proprietary RTLS (Real Time Locating System) functionality.
For this product development I completed the hardware design including component selection, schematic capture, PCB layout, firmware architecture, initial prototype assembly and testing.
It was a challenge to make the 18000-7 and RTLS functionality coexist. There were number of timing conflicts that needed a solution that would result in low power while maintaining responsiveness.
I was a member of the firmware development team. I acted as the scrum master and also developed some of the code.

pressur temperatuere recorder

pressure temperature recorder

This device fit inside a machined metal tube to be lowered into natural gas wells with pressures up to 20,000 PSI and temperatures to 150ÂșC. It recorded pressure with the accuracy of 0.021% F.S. (Full Scale) and resolution of 0.0003% F.S..

I designed it this device with a 24 delta sigma converter. Careful calibration procedure was used to achieve the required accuracy.

I completed the design of the electronics, prepared schematics PCB and completed the firmware for this device.