Short to Medium Range Positional Device With Security (Car Locator)

Hong J. KimThomas NaJa Heon Ku

Problem Statement The Primary purpose of the Short to Medium Range

Positional Device is to locate an automobile from a short distance with a visual display.

The team will be implementing Radio Frequency (RF), RF sensors, microcontrollers, and Remote Keyless Entry System (RKE) to locate the automobile.

Background Ever come out of a store and

were not able to find the car? The Short to Medium Range Positional Device (Car Locator) will save time and the embarrassment of losing the car.

The Car Locator will assist the owner in finding the car quickly and with ease.

Background

Control Systems Computer Programming PCB Construction and Layout Circuit Analysis and Development Digital Communications.

Objective The objective of the car

locator is to design and produce a reliable car locating device.

The locator will incorporate security for loss or theft of the device.

Objectives

Wireless Communications Security Power Consumptions User Interface

Phase 1

Design Concept

Pugh Matrix

Specifications

Components

Order Parts

Pugh MatrixDesign Constraints Weight Using ISM

bandUsing WiFi

Using GPS

The system will use small size battery (Disk battery)

8 8 5 3

The system must be programmable 7 7 7 7

Device will be easy to use 9 8 7 7

The device must be portable 11 9 9 9

Simple function programming 7 6 4 4

Must work in any weather conditions. 10 10 10 10

Antenna Range must be within 500 ft. to 1 mile. 12 10 6 10

Must have low power consumption 12 10 5 7

The system will incorporate the Remote Keyless Entry System (RKE) with code rolling feature.

12 10 1 1

Easy to read. 12 9 9 8

Total 100 814 631 675

Specifications

RF 2.4 GHZ (ISM band)

RKE Features Security Features Power Consumption User Interface (ease)

Ordering Components Evaluation Boards RF Wireless

Components Security Components Remote Keyless Entry

System Circuit Components Programs

Phase 2

RF Concepts Car Unit Remote Unit

RF Concepts

Directional Sensing

Omni Directional 2.4 GHZ ISM Band

Car Unit

Omni Directional Transceiver

Remote Unit Directional

Sensing Cardioid

Phase 3

Security Fingerprint Scanner Rolling Code

Techology

Phase 4

Interface Remote Unit

LCD/LED Display RKE Functionality

Car Unit Reset/Reconfigure

Phase 5

Power Consumption Remote Unit

Disc, AA, AAA Batteries

Car Unit Car Battery

Functional Block Diagram

Filter and

Amp

Analog to

Digital Convert

er

Digital to

Analog Convert

er

Interface and Displa

y

Microproces

sor

Transceiver in Car

Filter and

Amp

Antenna

Power Manage

ment

Antenna

ADC and Filter and

Amp / DAC and Filter and

Amp

Microproces

sor

Transceiver in

the Remote

D D

AA

D

A A

W

D

A

W

D - DigitalA - AnalogW - Wireless

Planned Schedule

Estimated Cost*

Equipment Quantity Cost Total

Microcontroller

development board

2 $150 - $300 each $300 - $600

RF antenna

development boards

2 Š 3 $100 each $200 - $300

Components (resisters,

caps., transistors, etc.)

$200 $200

RKE components 1 $100 $100

Total estimate $800 - $1200

*Total cost to be determined

Conclusion Achieving

Specifications Scheduling Marketing

Equals Success!!!!