1. Wisdom stone Development of smart detectors system – generation B Final Presentation Presented by: Emanuel Dima, Elad Kadosh Supervisor: Boaz Mizrachi Winter 2014 Dual semester project

2. Introduction Monitoring roads maintenance. Measuring and tracking changes in the road’s response to different vehicles.

3. Project Motivation Today we have “Wisdom Stone- generation A” Generation A didn’t provide the requested goals (Sufficient low power, low SNR, detector’s sensitivity) The creation of generation B

4. Project goals Finding a sensor which will produce less noise, and have a higher sensitivity than the one that is used for Generation A. (“Just in case”- save the option for assembling two sensors on the sampler board). Design of a new power board which will comply with the new demands of voltage and power.

5.  Learning of the current generation A  The choosing of the new components according to the goals of the projects  Mechanical design of the new stone  Working on the new schematics  Repairing of the schematics according to the feedback by Boaz  Sending the schematics to the circuits editor and to manufacturing Step by step

6. General schematic diagram

7. main pic Sensor1 Ms9001 Colibrys Single output ADC ADS1282 LPF+AMP Sensor2 1221L002 S.Design Differential output dual channel sampler Block Diagram - sampler Digital Sensor MMA8451Q

8. Block Diagram - power Power Manager DC/DC 3.3V DC/DC 12V DC/DC -12V controller Lithium Battery Rechargeable Battery USB Photo electric cell Power Enable X4 LDO DC/DC 5V

9. Mechanical design

10. Mechanical design- Inside the board

11. Mechanical design- Sampler Board

12. Mechanical design- Power Board

13. Top view – Sampler board

14. Top view – Power board

15.  Omitting the unnecessary “Sampler 2” board (mechanical design).  Adding two small boards upon the Sampler board for controlling the axis which the sensors work on.  Adding an LDO (Low Noise Dropout Regulator) series with DC\DC for better SNR.  Keeping the digital sensor from Generation A to sample the vibrations, because the analog sensors are too sensitive for measuring them. Additions\Improvements

16. Looking Towards Part B… Changing of the existing software:- 01.01.15 * Learning the current software * Complete the missing function Assembling the entire parts on the boards -15.02.15 Activating the boards -15.03.15 Burning the software on to the main board -01.04.15 Integration – operating the complete and final “Wisdom Stone” -01.05.15

17.  Still early to know if the goals of the project were achieved (low noise, low power consumption). It would be tested on the second part.  Using various ways for ensuring low noise (LDO, single to differential, ultra noise components)  Working by certain principles to ensure for minimizing mistakes in manufacturing (puppet checking, mark by colors, stick to several sketching principles) In Summary…