NTUEE-DCLAB Group 7

Introduction

These are lab materials for NTUEE DCLab forked from

https://github.com/sandy30538/NTUEE-DCLAB-Materials.git

Content

• Lab1: RNG
• Lab2: RSA decoder
• Lab3: Audio Reacorder& Player

Final Project: Real-Time FPGA-based Acoustic Imaging

Block diagram

Hardware

• Cyclone IV-E DE2-115 FPGA
• INMP441 MEMS microphone*16
• VGA display
• Laser cutting Board, 10cm wide for microphone (with .dxf file in this repo)

Abstract

We implemented Delay-and-sum Beamforming by 16 MEMS microphones (INMP441) which receives sound data via I2S protocol. The delay $\delta_i(p)$ is generated by the module delta_generator.sv, which is automated generated by python file. Next, the data will be stored in ring-buffer which provides access to the delayed delta. Next, for each processed data, we can sum these data and squared in Add_Square.sv. The data is truncated and stored into SRAM. Finally, VGA will access the data in SRAM and display the intensity on the screen. Our implementation demonstrates a significant reduction in implementation costs compared to currently high manufacturing costs in the industry.

DEMO!!

The following are recorded demo videos.

1 sound source 2 sound sources