地震儀

[材料]

Arduino主板 x 1

麵包板 x 1

GY-88感測器 x 1

OLed x 1

[OLED每排文字說明]

單位： m/s^2
X軸、Y軸、Z軸的加速度
三軸合併的加速度(已減掉重力加速度的影響)；每五秒內的最大加速度，數字已乘上100，單位為cm/s^2
顯示五秒內地震的最大震度

[GY-88腳位]

VIN -> arduino pin3

3V3 --> arduino 3v3

GND --> arduino GND

SCL --> arduino A5

SDA --> arduino A4

[OLed 腳位]

VCC --> arduino 3.3V

GND --> arduino GND

SCL --> arduino A5

SDA --> arduino A4

#include <Adafruit_MPU6050.h>

#include <Adafruit_SSD1306.h>

#include <Adafruit_Sensor.h>

Adafruit_MPU6050 mpu;

Adafruit_SSD1306 display = Adafruit_SSD1306(128, 32, &Wire);

unsigned long begin_time = -6000;

void setup() {

Serial.begin(115200);

while (!Serial);

Serial.println("MPU6050 OLED demo");

if (!mpu.begin()) {

Serial.println("Sensor init failed");

while (1)

yield();

}

Serial.println("Found a MPU-6050 sensor");

mpu.setAccelerometerRange(MPU6050_RANGE_16_G);

Serial.print("Accelerometer range set to: ");

switch (mpu.getAccelerometerRange()) {

case MPU6050_RANGE_2_G:

Serial.println("+-2G");

break;

case MPU6050_RANGE_4_G:

Serial.println("+-4G");

break;

case MPU6050_RANGE_8_G:

Serial.println("+-8G");

break;

case MPU6050_RANGE_16_G:

Serial.println("+-16G");

break;

}

mpu.setGyroRange(MPU6050_RANGE_500_DEG);

Serial.print("Gyro range set to: ");

switch (mpu.getGyroRange()) {

case MPU6050_RANGE_250_DEG:

Serial.println("+- 250 deg/s");

break;

case MPU6050_RANGE_500_DEG:

Serial.println("+- 500 deg/s");

break;

case MPU6050_RANGE_1000_DEG:

Serial.println("+- 1000 deg/s");

break;

case MPU6050_RANGE_2000_DEG:

Serial.println("+- 2000 deg/s");

break;

}

mpu.setFilterBandwidth(MPU6050_BAND_260_HZ);

Serial.print("Filter bandwidth set to: ");

switch (mpu.getFilterBandwidth()) {

case MPU6050_BAND_260_HZ:

Serial.println("260 Hz");

break;

case MPU6050_BAND_184_HZ:

Serial.println("184 Hz");

break;

case MPU6050_BAND_94_HZ:

Serial.println("94 Hz");

break;

case MPU6050_BAND_44_HZ:

Serial.println("44 Hz");

break;

case MPU6050_BAND_21_HZ:

Serial.println("21 Hz");

break;

case MPU6050_BAND_10_HZ:

Serial.println("10 Hz");

break;

case MPU6050_BAND_5_HZ:

Serial.println("5 Hz");

break;

}

Serial.println("");

// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally

if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3C for 128x32

Serial.println(F("SSD1306 allocation failed"));

for (;;)

; // Don't proceed, loop forever

}

display.display();

delay(500); // Pause for 2 seconds

display.setTextSize(1);

display.setTextColor(WHITE);

display.setRotation(0);

}

void loop() {

sensors_event_t a, g, temp;

mpu.getEvent(&a, &g, &temp);

float x = a.acceleration.x;

float y = a.acceleration.y;

float z = a.acceleration.z;

display.clearDisplay();

display.setCursor(0, 0);

Serial.print("Accelerometer ");

Serial.print("X: ");

Serial.print(x, 1);

Serial.print(" m/s^2, ");

Serial.print("Y: ");

Serial.print(y, 1);

Serial.print(" m/s^2, ");

Serial.print("Z: ");

Serial.print(x, 1);

Serial.println(" m/s^2");

display.println("Accelerometer - m/s^2");

display.print(x, 2);

display.print(", ");

display.print(y, 2);

display.print(", ");

display.print(z, 2);

display.println("");

float acc_tot1 = (sqrt (x*x + y*y + z*z) - 9.525) *100;

float acc_tot2;

display.print(acc_tot1,5);

Serial.println(acc_tot1 ,5);

if (acc_tot1 >= acc_tot2) {

acc_tot2 = acc_tot1;

begin_time = millis();

}

if (millis() - begin_time > 5000) {

acc_tot2 = acc_tot1;

}

/*

Serial.print(begin_time);

Serial.print(" ");

Serial.print(acc_tot1);

Serial.print(" ");

Serial.println(millis());*/

display.setCursor(68, 16);

display.println(acc_tot2,5);

display.print("1 2 3 4 5- 5+ 6- 6+ 7");

int delay_time = millis() - begin_time;

if (acc_tot2 >= 0.8) {

display.setCursor(0, 24);