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我有一個柔性傳感器連接一個arduino百合墊和一個47k ohms
電阻。柔性傳感器與arduino
我的問題是,我無法從柔性傳感器得到一致的值:有時,我得到很奇怪的讀數,即使彎曲傳感器不是彎曲狀態。
我試圖更改straight_resistance
和bend_resistance
的值,但似乎無法解決問題。
這是我的代碼,期待尋求幫助。
const int FLEX_PIN = A0; // Pin connected to voltage divider output
// Measure the voltage at 5V and the actual resistance of your
// 47k resistor, and enter them below:
const float VCC = 4.98; // Measured voltage of Ardunio 5V line (r1/r1+r2)5
const float R_DIV = 47500.0; // Measured resistance of 3.3k resistor
// Upload the code, then try to adjust these values to more
// accurately calculate bend degree.
const float STRAIGHT_RESISTANCE = 24248750.00; // resistance when straight
const float BEND_RESISTANCE = 48544996.00; // resistance at 90 deg
void setup()
{
Serial.begin(9600);
pinMode(FLEX_PIN, INPUT);
}
void loop()
{
// Read the ADC, and calculate voltage and resistance from it
int flexADC = analogRead(FLEX_PIN);
float flexV = flexADC * VCC/1023.0;
float flexR = R_DIV * (VCC/flexV - 1.0);
Serial.println("Resistance: " + String(flexR) + " ohms");
// Use the calculated resistance to estimate the sensor's
// bend angle:
float angle = map(flexR, STRAIGHT_RESISTANCE, BEND_RESISTANCE,
0, 90.0);
Serial.println("Bend: " + String(angle) + " degrees");
Serial.println();
delay(750);
}
您是否檢查您的柔性傳感器是否沒有損壞?你可以嘗試用歐姆表檢查出來。 – zmo