Senior Project Design Review

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2 Νοε 2013 (πριν από 3 χρόνια και 1 μήνα)

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Senior Project Design Review

Remote Visual Surveillance
Vehicle (RVSV)

Manoj Bhambwani

Tameka Thomas

Project Description

Remote controlled vehicle with mounted Internet

Both the vehicle and camera motion is controlled by
user via an Internet interface which sends the signal
through the serial port to a transceiver

time video from the Internet camera is received
through the same interface via the Ethernet
connection to a wireless router

Project Design Introduction

The project design is split into the
following modules:

Radio Signal Processing


this includes the Java Applet and the serial port


this includes the microcontroller and the transceiver
circuit which it controls

Vehicle Control

Camera Control

Obstacle Detection

Project Design: Transmission

The transceiver circuit includes a transceiver IC which
modulates and controls transmission of the desired signal, a
Max232 which converts the RS
232 signal to TTL logic and a RS
232 connector

This unit uses an AC wall adapter for the power supply in order
to minimize circuit and need for batteries

The Internet interface uses two java applets, one to display the
video and one to control the camera and vehicle movement

The video display applet is a feature of the Internet camera and is
not controlled by the user in any way

The motion control applet consists of a read
only text box and 8
buttons total, each button sends a separate control signal to the
serial port and the text box is to alert the user of any obstacles or
causes of an incomplete transaction

Project Design: Transmission,

Rough Draft GUI

Project Design: Transmission,

Final Draft GUI Concept

Project Design: Transmission,

Current Transmitter Module

Project Design: Receiving

The transceiver circuit consists of the transceiver
module and a microcontroller which processes the

The microcontroller will determine what movement
is to be made and will take info from the obstacle
detection circuit to determine what moves can be

The microcontroller will also be in charge of
signaling back to the user via the transceiver if a close
obstacle has caused the vehicle not to move

Project Design: Receiving,
Current Receiver Module

Power Supply

Project Design: Receiving,
Microcontroller Design

Microcontroller will
process the data
received and will also
decide if the vehicle
movement can continue
to be made

For camera movement,
the microcontroller will
pass on information to
another microcontroller

Project Design:

Vehicle Control

Microcontroller used to control the vehicle is
the same as the one discussed in the previous

There are two motors being controlled

Drive motor

handles forward and backward

Steering motor

handles left and right motion

Both motors are controlled using H

Power design used is same as the one
discussed in the previous module

Project Design: Vehicle
Control, Work in Progress

Project Design:

Camera Control

Microcontroller will control the servo motor
which will handle the camera movement

The camera will be mounted on top of the
servo, allowing it a 180º viewing range

The servo and microcontroller use the main
vehicle power supply and the camera has it’s

The power supply for the camera is
completed and is still being tested

Project Design: Camera
Control, Power Supply

Project Design:

Obstacle Detection

The obstacle detection circuit
uses the Sharp Distance
Measurement Sensor
(GP2D120) which outputs a
higher voltage based on the
closeness of the obstacle

The sensor connects the base
of a transistor which will
alert the microcontroller of
an obstacle by feeding it a
logic 0

Restrictions due to Design:

The decision to use a servo motor for
the camera movement restricts our
viewing angle to only 180º

Operating range by specs will be
approximately 150 ft

Battery life so far, according to our
testing results, is 2 hours

Implementation & Test

Flow of implementation:

Serial Port Transceiver prototype

Vehicle Transceiver prototype

Interface vehicle transceiver with motion control

Interface all with camera motion control

Implement Obstacle detection and error encoding

Each step will include several levels of testing, where


Does it work?


How long do I have the power?


How do I handle rough


How far can I go?

Current Status

Summer Completion:

Camera Power Supply prototype built and currently
finishing testing

Functional testing for: transceivers, serial communication
(write only), obstacle detection, steering motor & camera
motion motor

First draft of Java Applet for serial communication

Currently working on:

Signal Encoding

Serial Communication, read & write

Microcontroller for receiver, vehicle & camera control

Drive & Steering motor

Vehicle power supply

Possible Showstoppers

Vehicle modification

due to the fact that mechanics
are our weakest point and that this is a redesign of an
existing vehicle frame, this could possible cause us
the most headache


ability to backtrack, purchased two vehicles so
that if one modification doesn’t work there is room for

Power, power, power

not really a showstopper, as
much as it is a “showpauser”


we’re currently working on various ideas on how
to minimize the amount of batteries needed

Questions, Comments,