Projects:2015s1-21 Inexpensive Portable Radar System - Revision history

A1213778: /* Student Members */

2015-10-23T03:53:23Z

‎Student Members

A1213778: /* RF Redesign */

2015-10-23T03:51:15Z

‎RF Redesign

A1629401: /* Objective 2; Implementing an Interface */

2015-10-22T22:57:30Z

‎Objective 2; Implementing an Interface

A1629401: /* Objective 1; Reimplementing Processing Procedure */

2015-10-22T22:53:04Z

‎Objective 1; Reimplementing Processing Procedure

A1213778: /* RF Design */

2015-10-22T19:20:57Z

‎RF Design

A1213778: /* Introduction */

2015-10-22T19:20:15Z

‎Introduction

A1213778: /* Implement All in One PCB */

2015-10-22T19:17:29Z

‎Implement All in One PCB

A1630737: /* Implement All in One PCB */

2015-10-22T14:20:33Z

‎Implement All in One PCB

A1630737: /* Objective 4; Reimplementing Power Source */

2015-10-22T14:18:35Z

‎Objective 4; Reimplementing Power Source

A1630737: /* Objective 5; Implementing Radar Scanning */

2015-10-22T14:12:34Z

‎Objective 5; Implementing Radar Scanning

@@ Line 200: / Line 200: @@
 *'''Angus Reid:'''
-  Bachelor of Engineering (Honours)(Electrical and Electronic) with Bachelor of Mathematical and Computer Science
+  Bachelor of Engineering (Honours)(Electrical and Electronic)
 *'''Wenkai (Kelvin) Zhu:'''

@@ Line 131: / Line 131: @@
 ====RF Redesign====
+As the key challenges posed to us throughout the project were due to our lack of knowl- edge and experience. when the project went on, our skills improved and the challenges became less of an issue. This allowed us to continuously improve the RF system through the design stage, and achieve more accurate and relevant results in testing.
 ====Conclusion====

← Older revision		Revision as of 22:57, 22 October 2015
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	===Objective 2; Implementing an Interface===		===Objective 2; Implementing an Interface===
		+	For the implementation of the interface, the Sainsmart 7" TFT touch screen display was used. This screen uses a driver board that is able to accept HDMI, VGA and AV inputs. The Raspberry Pi 2 has a built in HDMI, so this was used as the video output.
		+
		+	[[File:displaysteup.jpg]]

	===Objective 3; Reimplementing RF System===		===Objective 3; Reimplementing RF System===

← Older revision		Revision as of 22:53, 22 October 2015
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	===Objective 1; Reimplementing Processing Procedure===		===Objective 1; Reimplementing Processing Procedure===
		+	====Software Design====
		+	The software design for this project was based on the 2014 Honour’s groups Matlab code, adapting it to C++ and looping the main function to create continual data output. The design was developed in 5 steps: Breaking down the existing code, reorganizing the components into a loop, exploring different C++ libraries to achieve the required functions and interfacing with hardware.
		+
		+	The resulting design is shown in the flowchart below.
		+
		+	[[File:2015design.png]]
		+
		+	====Testing====
		+	Each major section of the software was tested with generated inputs from Matlab, with the results verified in Matlab. It was found that the use of audio as an output method was not suitable and so a hardware generated signal had to be implemented for input to the VCO. All other sections of the code worked as planned.
		+	The resulting software design was able to produce a plot which represents the frequencies with the greatest amplitude in the received signal. The image below shows the graphical output for a 440Hz sine wave input.
		+
		+	[[File:440HzSinewave.png]]

	===Objective 2; Implementing an Interface===		===Objective 2; Implementing an Interface===

← Older revision		Revision as of 19:20, 22 October 2015
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	The design of an analog PCB is critical as there are many factors that can effect the signal in the circuits transmission line. Generally, the circuit will be attempting to amplify and use one particular signal while rejecting all others including any noise present. This section will discuss the design rules, guidelines and optimization techniques used to design and implement a successful PCB circuit. It defines key characteristics and is then broken down into key areas and the design considerations that apply to them.		The design of an analog PCB is critical as there are many factors that can effect the signal in the circuits transmission line. Generally, the circuit will be attempting to amplify and use one particular signal while rejecting all others including any noise present. This section will discuss the design rules, guidelines and optimization techniques used to design and implement a successful PCB circuit. It defines key characteristics and is then broken down into key areas and the design considerations that apply to them.
		+
		+	[[File:NewRF_OldRF.png\|540px]]

	====RF Testing====		====RF Testing====

← Older revision		Revision as of 19:20, 22 October 2015
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	Radars operate on the principle of echolocation; they transmit an electromagnetic radio wave and analyse any reflected wave (or echo) to gather information regarding potential targets. These targets can include cars, planes, and clouds. This project involves improving an existing radar system which is based on the MIT Coffee Can Radar. The project has combined the hardware and software elements of RF engineering to produce a completely portable system which operates on the 2.4 GHz Wi-Fi band and is capable of two different modes. These modes are the Doppler mode which calculates a targets speed, and the Range mode which calculates its distance. The primary aims of this year’s project was to improve the radars portability, decrease its cost, and increase its functionality.		Radars operate on the principle of echolocation; they transmit an electromagnetic radio wave and analyse any reflected wave (or echo) to gather information regarding potential targets. These targets can include cars, planes, and clouds. This project involves improving an existing radar system which is based on the MIT Coffee Can Radar. The project has combined the hardware and software elements of RF engineering to produce a completely portable system which operates on the 2.4 GHz Wi-Fi band and is capable of two different modes. These modes are the Doppler mode which calculates a targets speed, and the Range mode which calculates its distance. The primary aims of this year’s project was to improve the radars portability, decrease its cost, and increase its functionality.
−
−	~~[[File:NewRF_OldRF.png\|540px]]~~

	==Background==		==Background==

@@ Line 128: / Line 128: @@
 [[File:outputvoltage1.png]]
-== Implement All in One PCB ==
+==== Implement All in One PCB ====
 All in one PCB could make the radar system smaller. "Power source, Video Amplifier"

← Older revision		Revision as of 14:18, 22 October 2015
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	[[File:outputvoltage1.png]]		[[File:outputvoltage1.png]]
		+
		+	== Implement All in One PCB ==
		+	All in one PCB could make the radar system smaller. "Power source, Video Amplifier"

	===Objective 5; Implementing Radar Scanning===		===Objective 5; Implementing Radar Scanning===

@@ Line 130: / Line 130: @@
 ===Objective 5; Implementing Radar Scanning===
 This is a new function for this project. The 28BYJ-48 with ULN2003 driver has been selected because it is the cheapest. Then install the Wringpi file for the GPIO, because the stepper motor is controlled by raspberry pi and connect to GPIO. The most important part is programming.
 [[File:Wringpi.png]]