我正在從一個項目中獲得電阻式觸摸屏的模擬值並將它們轉換爲交點。轉換交點區域以生成座標
這裏是我使用一個Arduino UNO和點的建設使用的工具,叫做處理的數據集合的代碼。
#define side1 2
#define side2 3
#define side3 4
#define side4 5
#define contact A0
void setup() {
pinMode(contact, INPUT);
pinMode(side1, OUTPUT);
pinMode(side2, OUTPUT);
pinMode(side3, OUTPUT);
pinMode(side4, OUTPUT);
Serial.begin(9600);
}
void loop() {
int sensorValue1;
int sensorValue2;
int sensorValue3;
int sensorValue4;
// SENSOR VALUE 1:
digitalWrite(side1, LOW);
digitalWrite(side2, HIGH);
digitalWrite(side3, HIGH);
digitalWrite(side4, HIGH);
delay(5);
for (int i = 0; i < 10; i++){
sensorValue1 = analogRead(contact);
}
// SENSOR VALUE 2:
digitalWrite(side2, LOW);
digitalWrite(side3, HIGH);
digitalWrite(side4, HIGH);
digitalWrite(side1, HIGH);
delay(5);
for (int i = 0; i < 10; i++){
sensorValue2 = analogRead(contact);
}
// SENSOR VALUE 3:
digitalWrite(side3, LOW);
digitalWrite(side2, HIGH);
digitalWrite(side4, HIGH);
digitalWrite(side1, HIGH);
delay(5);
for (int i = 0; i < 10; i++){
sensorValue3 = analogRead(contact);
}
// SENSOR VALUE 2:
digitalWrite(side4, LOW);
digitalWrite(side3, HIGH);
digitalWrite(side2, HIGH);
digitalWrite(side1, HIGH);
delay(5);
for (int i = 0; i < 10; i++){
sensorValue4 = analogRead(contact);
}
Serial.print(sensorValue1);
Serial.print(",");
Serial.print(sensorValue2);
Serial.print(",");
Serial.print(sensorValue3);
Serial.print(",");
Serial.print(sensorValue4);
Serial.println();
}
這是用於構建圖的處理代碼。
import processing.serial.*;
Serial myPort; // The serial port
int maxNumberOfSensors = 4;
float[] sensorValues = new float[maxNumberOfSensors];
float sensorValueX;
float sensorValueX1;
float sensorValueY;
float sensorValueY1;
int scaleValue = 2;
void setup() {
size(600, 600); // set up the window to whatever size you want
//println(Serial.list()); // List all the available serial ports
String portName = "COM5";
myPort = new Serial(this, portName, 9600);
myPort.clear();
myPort.bufferUntil('\n'); // don't generate a serialEvent() until you get a newline (\n) byte
background(255); // set inital background
smooth(); // turn on antialiasing
}
void draw() {
//background(255);
//noFill();
fill(100,100,100,100);
ellipse(height,0, scaleValue*sensorValues[0], scaleValue*sensorValues[0]);
ellipse(0,width, scaleValue*sensorValues[1], scaleValue*sensorValues[1]);
ellipse(height,width, scaleValue*sensorValues[2], scaleValue*sensorValues[2]);
ellipse(0,0, scaleValue*sensorValues[3], scaleValue*sensorValues[3]);
//ellipse(sensorValueY, sensorValueX, 10,10);
//println(sensorValueY,sensorValueX);
sensorValueX = ((sensorValues[3]*sensorValues[3])-(sensorValues[2]*sensorValues[2])+600*600)/2000;
sensorValueX1 = ((sensorValues[0]*sensorValues[0])-(sensorValues[1]*sensorValues[1])+600*600)/2000;
sensorValueY = ((sensorValues[3]*sensorValues[3])-(sensorValues[2]*sensorValues[2])+(600*600))/2000;
sensorValueY1 = ((sensorValues[1]*sensorValues[1])-(sensorValues[0]*sensorValues[0])+(600*600))/2000;
line(0, scaleValue*sensorValueX, height,scaleValue* sensorValueX);
line(scaleValue*sensorValueY, 0, scaleValue*sensorValueY, width);
ellipse(scaleValue*sensorValueY, scaleValue*sensorValueX, 20,20);
line(0, scaleValue*sensorValueX1, height,scaleValue* sensorValueX1);
line(scaleValue*sensorValueY1, 0, scaleValue*sensorValueY1, width);
ellipse(scaleValue*sensorValueY1, scaleValue*sensorValueX1, 20,20);
println(scaleValue*sensorValueX,scaleValue*sensorValueY);
}
void serialEvent (Serial myPort) {
String inString = myPort.readStringUntil('\n'); // get the ASCII string
if (inString != null) { // if it's not empty
inString = trim(inString); // trim off any whitespace
int incomingValues[] = int(split(inString, ",")); // convert to an array of ints
if (incomingValues.length <= maxNumberOfSensors && incomingValues.length > 0) {
for (int i = 0; i < incomingValues.length; i++) {
// map the incoming values (0 to 1023) to an appropriate gray-scale range (0-255):
sensorValues[i] = map(incomingValues[i], 0, 1023, 0, width);
//println(incomingValues[i]+ " " + sensorValues[i]);
}
}
}
}
我想知道如何將這些點的交點轉換爲座標?例如:在圖像中,我向您展示了,我將尺寸參數設置爲(600,600)。是否有可能將該交點更改爲座標值?目前,我的代碼正在打印座標,但它們是對角線,例如在x和y值相等。我希望x和y的座標具有不同的數量,這樣我就可以獲得正方形中不同邊的座標。有人可以幫忙嗎?
所以,你基本上想要做[trilateration](https://en.wikipedia.org/wiki/Trilateration)與四個網站? –
你好,我看着三邊測量,我認爲這就是我要如何解決問題。你能幫忙嗎? – marshmellooooooos
要回答你的問題,我們需要更多的細節。你在Arduino中得到的是什麼意思('sensorValue1' - 'sensorValue4')?這是壓力嗎?如果是的話在哪些地方?什麼是規模?不只是[0-1],而是0.5的意思(是線性的,對數等)?也許你有一些你使用的硬件(觸摸屏)的參考資料/手冊。如果不知道這些值**完全**意味着不可能將它們恰當地聚合到任何你想要的。 – SergGr