K210 - sound source location and sound recognition

Preface

coming ,K210 Sound source location of .

［2022 Electric competition ] Sound source location and tracking system （E topic ）k210 Microphone array effect measurement ！

sipeed It's official , It's not bad .

One 、 modular

sipeed Home sound source positioning module ,K210 You can use whatever you often use

Connect the microphone array module with pyAI-K210 Use FPC 10P Connect with a flat cable , The interface is on the back of the development board （ The flat cable is connected under the golden finger ）.

The microphone array expansion module consists of 7 A digital microphone , among 6 They are distributed in different directions around ,1 In the center of the module , It is easy to identify sound sources in all directions . in addition 12 individual LED Indicator light , It is convenient to indicate the location of the sound source .

Two 、 Instructions

1. Correlation function

2. Code

# Import MIC_ARRAY and LCD modular 
from Maix import MIC_ARRAY as mic
import lcd

# Initialization module 
lcd.init()
mic.init()

while True:

    # Get the original black-and-white bitmap of the sound source , Size  16*16
    imga = mic.get_map()

    # Get the sound source direction and set LED Show 
    b = mic.get_dir(imga)
    a = mic.set_led(b,(0,0,255))

    # Reset the sound source map to a square , Rainbow color 
    imgb = imga.resize(160,160)
    imgc = imgb.to_rainbow(1)

    # Display sound source diagram 
    lcd.display(imgc)

mic.deinit()

Phenomenon display

There is a problem , No coordinates , Without coordinates, there is no way to locate
This is the code written by a big man , You can refer to , Enclosed Link to the original text

for i in range(len(b)):
        if b[i]>=2:
            AngleX+= b[i] * math.sin(i * math.pi/6)
            AngleY+= b[i] * math.cos(i * math.pi/6)
    AngleX=round(AngleX,6) # Calculate the coordinate conversion value 
    AngleY=round(AngleY,6)
    if AngleY<0:AngleAddPi=180
    if AngleX<0 and AngleY > 0:AngleAddPi=360
    if AngleX!=0 or AngleY!=0: # Parameter correction 
        if AngleY==0:
            Angle=90 if AngleX>0 else 270 # fill X Shaft angle 
        else:
            Angle=AngleAddPi+round(math.degrees(math.atan(AngleX/AngleY)),4) # Calculation angle 
        AngleR=round(math.sqrt(AngleY*AngleY+AngleX*AngleX),4) # Calculate the strength 
        mic_list.append(AngleX)
        mic_list.append(AngleY)
        mic_list.append(AngleR)
        mic_list.append(Angle)
    a = mic.set_led(b,(0,0,255))#  To configure  RGB LED  Color value 
    return mic_list # Returns a list of ,X coordinate ,Y coordinate , Strength , angle 
while True:
    print(get_mic_dir())
    time.sleep_ms(100)