我无法将我的加速度计数据xyz转换为频率。

Question

我正在使用Arduino nano ble 33，我想将x，y，z的加速度计值转换成频率，然后这些频率值需要通过Arduino nano 33 ble发送。有人能帮我解决这个问题吗？提前谢谢。

这是我的代码:代码现在只从加速度计读取原始数据。

< #include "Arduino.h"
    #include <ArduinoBLE.h>
    #include "Nano33BLEAccelerometer.h"
    // #include "arduinoFFT.h"
    
    #define BLE_BUFFER_SIZES    20
    #define BLE_DEVICE_NAME     "Nano 33 BLE"
    #define BLE_LOCAL_NAME      "Accelerometer BLE"
    
    
    Nano33BLEAccelerometerData accelerometerData;
    
    BLEService BLEAccelerometer("590d65c7-3a0a-4023-a05a-6aaf2f22441c");
    BLECharacteristic accelerometerXBLE("0004", BLERead | BLENotify | BLEBroadcast, 
    BLE_BUFFER_SIZES);
    BLECharacteristic accelerometerYBLE("0005", BLERead | BLENotify | BLEBroadcast, BLE_BUFFER_SIZES);
    BLECharacteristic accelerometerZBLE("0006", BLERead | BLENotify | BLEBroadcast, BLE_BUFFER_SIZES);
    
    
    char bleBuffer[BLE_BUFFER_SIZES];
    
    void setup()
    {
        Serial.begin(115200);
        while(!Serial);
    
        if (!BLE.begin()) 
        {
            while (1);    
        }
        else
        {
            BLE.setDeviceName(BLE_DEVICE_NAME);
            BLE.setLocalName(BLE_LOCAL_NAME);
            BLE.setAdvertisedService(BLEAccelerometer);
    
            BLEAccelerometer.addCharacteristic(accelerometerXBLE);
            BLEAccelerometer.addCharacteristic(accelerometerYBLE);
            BLEAccelerometer.addCharacteristic(accelerometerZBLE);
    
            BLE.addService(BLEAccelerometer);
            BLE.advertise();
    
            Accelerometer.begin();
            accelerometerXBLE.writeValue((byte)0x01);
            
            accelerometerYBLE.writeValue((byte)0x01);
            accelerometerZBLE.writeValue((byte)0x01); 
            Serial.println("X, Y, Z");
        }
    }
    
    void loop()
    {
        BLEDevice central = BLE.central();
        if(central)
        {
          Serial.println("Connected");
            int writeLength;
            while(central.connected())
            {            
                if(Accelerometer.pop(accelerometerData))
                {
                    writeLength = sprintf(bleBuffer, "%f", accelerometerData.x);
                    accelerometerXBLE.writeValue(bleBuffer);
                    writeLength = sprintf(bleBuffer, "%f", accelerometerData.y);
                    accelerometerYBLE.writeValue(bleBuffer);
                    writeLength = sprintf(bleBuffer, "%f", accelerometerData.z);
                    accelerometerZBLE.writeValue(bleBuffer);      
                    delay(1000);
                    Serial.printf("%f,%f,%f\r\n", accelerometerData.x, accelerometerData.y, 
                     accelerometerData.z);
                }
            }
        }
    } >

Answer 1

你所要求的并不简单。您将需要使用傅立叶变换。点击此处阅读：https://see.stanford.edu/materials/lsoftaee261/chap8.pdf