ULTRASONIC TRANSMITTER

Amanda Hellberg, Brandon Ravenscroft, Jonathan Owen, and Kai Gustafson

TEAM B-CDR

LEVEL 0: RADAR SYSTEM

Programmable Amplifier

Buffer Amplifier

ImpedanceMatching Network

Transducer

On-board RCVR

Ardu

ino

DUE DAC

ADC

Test Point

Echo from chirp

Output Chirp

Test Point

SCHE

MAT

IC: R

ADAR

SY

STEM

16-ELEMENT ULTRASONIC TRANSMITTER

TRANSMITTER SYSTEM AND SINGLE CHANNEL RECEIVER TEST

Transmitted Chirp

Received Chirp

Beat Waveform

BEAT WAVEFORM AND SPECTRUMBeat Waveform

Spectrum

Beat Frequency (Range = 53.6 cm)*Transmitter and Receiver Separated by 53 cm

MIXER SPECTRUM TEST

LO = 34.5 kHz

RF=40.0 kHz

MIXER OUTPUT SPECTRUM (FILTERED)Mixer Output (IF)Post-Filter

Transmitted Sinusoid

Mixer Output (IF)Spectrum

Down Conversion (6.5 kHz)Up Conversion (74.5 kHz)

LO Signal (34.5 kHz)

RF Signal (40 kHz)

Suppression: 23 dB

HOW TO ACCOMPLISH THIS

PROJECT MANAGEMENT

GANTT CHART

RISKSInput Power to Arduino Due

Risk: The Arduino Due can only have an input of 3.3 V unlike the Arduino Uno having 5 V.

Mitigation: Zener diode limiter (clamping circuit.)Collaboration with Team Receiver

Risk: Improper co-location with Receiver Team. Mitigation: Keep in close contact with Receiver team upon design of final board.

Scheduling Risk: Not having the code and/or board complete by deadlines. Mitigation: Sticking to Gantt chart schedule to ensure project components are completed on time. Risk: Manufacturing company lead times being inaccurate. Mitigation: Board design submitted two weeks early in event of delay.

Test PointsRisk: Having a completed faulty board and no way to connect to certain areas to test. Mitigation: Insert appropriate test points in design.

QUESTIONS?