Security and Control System for fluid in a tank

This rapport describes how a security and control system has been developed for moveable diesel tanks. Enormous amounts of diesel in Sweden are stolen every year and the tank that is most vulnerable is the moveable tank in other words tanks that can be moved around with diesel inside.The report proposes methods how to measure fluid amount in a tank and how to measure if diesel is disappearing from the tank.The report also describes a tank monitoring system prototype.

Contents

1 Introduction
1.1 BACKGROUND
1.1.1 How the system should work
1.2 PURPOSE/GOAL
1.2.1 Problem 1”How to measure fluid amount in a tank”
1.2.2 Problem 2 “Building a low power prototype”
1.3 LIMITATIONS
1.4 THESIS OUTLINE
2 Theoretical background
2.1 THE TANK
2.2 DIESEL DENSITY DEPENDENCY ON TEMPERATURE
2.3 DIFFERENT WAYS TO MEASURE FLUID QUANTITY IN A TANK
2.3.1 Level measuring
2.3.2 Pressure measuring
2.3.3 Weight measuring
2.3.4 Volume measuring
2.4 RFID
2.5 GSM/GPRS
2.6 GPS
2.7 LOW POWER DESIGN
3 Design options and selections
3.1 SYSTEM DESIGN OVERVIEW
3.2 PROBLEM 1 “HOW TO MEASURE FLUID AMOUNT IN A TANK”
3.2.1 Practical solutions for level measuring
3.2.2 Practical solutions for pressure measuring
3.2.3 Practical solutions for weight measuring
3.2.4 Chosen sensors
3.2.5 Sensors electronics
3.3 PROBLEM 2 “BUILDING A LOW POWER PROTOTYPE”
3.3.1 DC/DC
3.3.2 RFID
3.3.3 I/O
3.3.4 GSM/GPRS
3.3.5 GPS
3.3.6 RADIO
3.4 THE SOFTWARE DESIGN
3.4.1 The tanks states
3.4.2 Normal state
3.4.3 Wait state
3.4.4 Menu state
3.4.5 FromTank and ToTank state
3.4.6 Moving state
3.4.7 Calibration/Service state
4 Result
4.1 PROBLEM 1 “HOW TO MEASURE FLUID AMOUNT IN A TANK”
4.1.1 Sensor electronics
4.1.2 Implemented sensors
4.1.3 Recommended sensors
4.2 PROBLEM 2 “BUILDING A LOW POWER PROTOTYPE”
4.2.1 DC/DC
4.2.2 I/O
4.2.3 GSM/GPRS, GPS, RAIO
4.2.4 RFID
4.2.5 Power consumption
5 Conclusions and discussion
6 References
7 Definitions
8 List of figures
9 Index
10 Appendix

Author: Kvist, Johan,

Source: Jönköping University

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