Doppler Shift Radar Speed Detector

Initial Proposed Specifications

Speed range 0-99 mile/ hourTarget is a car or a humanCover operating distance range of

50-100 meterCheap and simple implementationSmall size, handheld and portable

Part1: Introduction and Radar RF

Part2: Displaying the Speed

Part3: Application Software

Doppler Phenomenon

Doppler Radar Types Continuous Wave Radar CW

Un- Modulated CW Modulated CW

FMCW IFMCW

Pulsed Wave Radar MTI PD

Project Block Diagram

Signal Processing& Displaying Speed

2.6 GHzOscillator

Mixer Circuit

PCComputer &

Cameracos (wct)

cos((wc + wd) t)

wc

wc + wd wc

wd

Antenna

USB

Antenna λ/4 mono pole antenna Circular waveguide horn antenna

Radio Frequency Stage

Oscillator 2.6 GHz

Mixer & LPF

Audio Amplifier

RF Stage

Oscillator: 2.6 GHz Oscillator based on microwave transistor and PCB inductors and capacitors

Mixer & LPF: Schottky diode will mix both transmitted and Doppler shifted reflected signal using square law characteristics of diode junction

Audio Amplifier: common emitter amplifier will amplify Doppler signal

Part 2:Displaying The Speed & USB Connection

Displaying Speed Block Diagram

Conditioning Circuits

VCCD+D-GND

U2

USBCONN

AM FM

+

-

RST

CLKCE

R1470R

RA0/AN02

RA1/AN13

RA2/AN2/VREF-/CVREF4

RA3/AN3/VREF+5

RA4/T0CKI/C1OUT/RCV6

RA5/AN4/SS/LVDIN/C2OUT7

RA6/OSC2/CLKO14

OSC1/CLKI13

RB0/AN12/INT0/FLT0/SDI/SDA33

RB1/AN10/INT1/SCK/SCL34

RB2/AN8/INT2/VMO35

RB3/AN9/CCP2/VPO36

RB4/AN11/KBI0/CSSPP37

RB5/KBI1/PGM38

RB6/KBI2/PGC39

RB7/KBI3/PGD40

RC0/T1OSO/T1CKI 15

RC1/T1OSI/CCP2/UOE 16

RC2/CCP1/P1A 17

VUSB18

RC4/D-/VM 23

RC5/D+/VP 24

RC6/TX/CK 25

RC7/RX/DT/SDO 26

RD0/SPP0 19

RD1/SPP1 20

RD2/SPP2 21

RD3/SPP3 22

RD4/SPP4 27

RD5/SPP5/P1B 28

RD6/SPP6/P1C 29

RD7/SPP7/P1D 30

RE0/AN5/CK1SPP 8

RE1/AN6/CK2SPP 9

RE2/AN7/OESPP 10

RE3/MCLR/VPP 1

U2

PIC18F4550

D7

14D6

13D5

12D4

11D3

10D2

9D1

8D0

7

E6

RW

5RS

4

VSS

1

VDD

2

VEE

3

LCD1LM016L

Frequency Counting Algorithm

Start

Capture the counter value(Doppler frequency)

Display speed

Process& Format data

i

Initialization

Is one secondpassed?

Yes

Start Delay

Start counter

Recount

No

Recount

Sending Data through USB

Part3:Application Software

Application Software Interface

Intialize the system

START

Does The ConnectButton Pressed

Connect to USB

Yes

NO

Does USBDevice Exist

`

Error message:No device found

NO

Yes

Application Flow Chart

(1)

Run the Camera

Read Speed fromUSB and Display Itto the Left Meter

IF Speed>

Maxspeed

NO

Capture Image

Yes

Display InvalidSpeed to the Right

Meter

Flow chart continue…

(2)

(3)

(1)Connect to USB

start

Get List of AvailableUSB Devices

Select USB Device

Get the Required Size of the Buffer

Creat File for Transmittedand Received Data

(2)Run The Camera

Get ID (Device Index ) of Camera

Start Video Preview

Run Camera Driver

Update the Right Meter WithSpeed Value

modify Row Image Size and Type

Call Capturing FunctionDisplay Image

(3)Capture Image

Conclusion Microwave frequency affect circuit

analysis.

Air winds affect speed measurement, it is a clutter that affect radar performance.

Recommendations

Applying more analysis: Acceleration, Speed Profile and Jerk.

Image processing can be applied to detect special features in target image.

Images and Speeds can be sent remotely using internet, 3G or Wimax technology.

Thank you for Listening