"Mengsheng Cup" Electronic Design Competition

import librosa
import numpy as np
import matplotlib.pyplot as plt

# 加载 mp3文件
audio_file = '4.mp3'  #1, 2, 3, 4分别为打开/关闭灯光，打开/关闭空调
y, sr = librosa.load(audio_file, sr=None)

# 绘制波形
plt.figure(figsize=(10, 6))
plt.plot(np.linspace(0, len(y) / sr, len(y)), y)
plt.title("guan bi kong tiao 2m ")
plt.xlabel("Time (s)")
plt.ylabel("Amplitude")
plt.show()

# 计算信号的 RMS（Root Mean Square）值作为信号强度
rms = librosa.feature.rms(y=y)
print(f"RMS value: {np.mean(rms)}")

close all

% 参数设置
a = 40; % 麦克风阵列的长度（厘米）
b = 20; % 麦克风阵列的宽度（厘米）
fs = 20000; % 采样率
c = 343; % 声速（米/秒）
t = 0:1/fs:1; % 时间轴，信号时长1秒

% 麦克风阵列位置(原代位置取麦克风阵列的中心点）
mic_positions = [-a/2, -b/2;      % 麦克风1
                 a/2, -b/2;       % 麦克风2
                 -a/2, b/2;       % 麦克风3
                 a/2, b/2];       % 麦克风4

% 五个已知区域中心的声源坐标
source_positions = [0, 240;  % A区域
                    -50, 240; % B区域
                    -100, 240; % C区域
                    50, 240; % D区域
                    100, 240]; % E区域

% 从每个麦克风到声源的距离
distances = sqrt(sum((mic_positions - source_position).^2, 2));

% 模拟信号传播延时
delays = distances / c; % 根据距离计算传播延迟
signals = zeros(length(t), 4);
source_signal = sin(2 * pi * 1000 * t); % 生成一个1kHz的测试信号

% 计算TDOA
tdoa = zeros(1, 3); % TDOA between microphone pairs
tdoa(1) = delays(2) - delays(1); % Mic2-Mic1
tdoa(2) = delays(3) - delays(1); % Mic3-Mic1
tdoa(3) = delays(4) - delays(1); % Mic4-Mic1

% 使用最小化误差的优化方法估计声源位置
objective_func = @(pos) sum((sqrt(sum((mic_positions(2:end, :) - pos).^2, 2)) - sqrt(sum((mic_positions(1, :) - pos).^2)) - tdoa' * c).^2);

% 使用fminsearch进行优化，初始位置opoint为(0, 0)
opoint = [0, 0];
estimated_position = fminsearch(objective_func, opoint);

#include "asr.h"

extern "C"{ void * __dso_handle = 0 ;}

#include "setup.h"
#include "myLib/asr_event.h"
#include "HardwareSerial.h"

uint32_t snid;

void ASR_CODE();

/*描述该功能...*/
void ASR_CODE(){
  switch (snid) {
    case 1:
     digitalWrite(4,0);
     Serial.print("11");
     break;
    case 2:
     digitalWrite(4,1);
     Serial.print("22");
     break;
    case 3:
     digitalWrite(2,0);
     Serial.print("33");
     break;
    case 4:
     digitalWrite(2,1);
     Serial.print("44");
     break;
  }
}

void hardware_init(){
  setPinFun(13,SECOND_FUNCTION);
  setPinFun(14,SECOND_FUNCTION);
  Serial.begin(9600);
  vTaskDelete(NULL);
}

void setup()
{
  set_wakeup_forever();

  //{ID:1,keyword:"命令词",ASR:"打开灯光",ASRTO:""}
  //{ID:2,keyword:"命令词",ASR:"关闭灯光",ASRTO:""}
  //{ID:3,keyword:"命令词",ASR:"打开空调",ASRTO:""}
  //{ID:4,keyword:"命令词",ASR:"关闭空调",ASRTO:""}

  setPinFun(4,FIRST_FUNCTION);
  pinMode(4,output);
  setPinFun(4,FIRST_FUNCTION);
}