Sensors and Wireless Communications
Wireless Sensor Node
This assignment is divided into two parts as follow
a) Develop a Sensor Circuit using commodity components
b) Design a wireless sensor node using commodity wireless modules
The first part of the assignment is to design a prototype of home security system with passive proximity sensor, light sensor, temperature sensor and examine its performance.
Students are to design the security system with the proximity, light and temperature sensors. All sensors should be incorporated in one big circuit and if any sensor senses an intruder then it should trigger an alarm. The alarm could be flashing of LED or a speaker in the prototype circuit. The circuit should be designed and demonstrated within the due date (1st April). You should have a schematic of your circuit during demonstration. This prototype circuit will be used in the wireless part of the assignment. Therefore, you should keep it in a safe place for later use.
The report should address following topics
-The role of Encoder and Decoder in this circuit?
-Legal implication of using 433MHz band?
-The distance coverage of the wireless node with provided components
-How to increase the range of wireless node and discuss the improvements for this circuits
The report should also provide the recommendation as how to implement your prototype circuit in real time to provide home security. The justification for real-time circuit should be in terms of extra components, voltage and current requirements. In addition, state issues related to the practical implementation of the system and provide the possible solutions.
a) Introduction
Introduction of the assignment, your methodology
b) Circuit design
a. Sensor Part
1. Design of the circuit and explanation
2. Maths and your calculations for the circuit design
3. Schematic, components, EMI consideration for multifunction circuit. Discuss the main sources of EMI in your report and minimization technique. Support your work with authentic references.
b. Wireless Part
1. The role of Encoder and Decoder in this circuit?
2. Legal implication of using 433MHz band? (References required)
3. The distance coverage of the wireless node with provided components
4. How to increase the range of wireless node and discuss the improvements for this circuit.
c) Circuit demonstration
a. Sensor Part
1. Working of Proximity sensor circuit
2. Working of light sensor circuit
3. Working of temperature sensor circuit
4. Full circuit demonstration.
b. Wireless Part
1. Working of circuit
2. Explanation and understanding of your circuit during demonstration.
d) Circuit for real time implementation and suggested improvements in the existing circuit.
e) Conclusion
Attachment:- Sensor.pdf