Multiple voltage sensors

Projects Programming
1

I'm doing a project in which I'm monitoring the 3 voltages of 127V using 3 ZMPT101B sensors, using the library itself for the calculations.
After that, I'm passing a moving average filter to reduce network noise, and showing the values ​​in an HTML page.
The problem is that when you turn off one of the voltages, all of them drop, instead of just turning off.

I wanted to know if there is a way to make the readings of the 3 sensors more "individual"?

Follow my code below:

#include <SPI.h
#include <Ethernet.h
#include "EmonLib.h"

#define LED1 44
#define LED2 45
#define LED3 46
//#define VOLT_CAL1 945.40
#define VOLT_CAL2 844.17
#define VOLT_CAL3 1220.85
#define num 22
EnergyMonitor emon1;
EnergyMonitor emon2;
EnergyMonitor emon3;

int statusger;
int gerador = A6;
String gert;
String FALTA1;
String FALTA2;
String FALTA3;
float tensaoR = 0;
float tensaoS = 0;
float tensaoT = 0;
long moving_average(int sig);
int values[num];
float adc_noise1,
adc_noise2,
adc_noise3;

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(172, 22, 131, 12);
EthernetServer server(80);

void setup()
{

Ethernet.begin(mac, ip);  
server.begin();
Serial.begin(300);
pinMode(LED1,OUTPUT);
pinMode(LED2,OUTPUT);
pinMode(LED3,OUTPUT);
pinMode(A5,INPUT);
pinMode(A11,INPUT);
pinMode(A15,INPUT);
pinMode(gerador,INPUT);
emon1.voltage(5, VOLT_CAL2, 1.7);
emon2.voltage(11, VOLT_CAL2, 1.7);
emon3.voltage(15, VOLT_CAL3, 1.7);

}

//========================= MEDIÇÃO DAS TENSÕES COM FILTRO DE RUÍDO GAUSSIANO ===========================================//

void loop()
{

emon1.calcVI(20,2000);
tensaoR = emon1.Vrms; // FASE R
adc_noise1 = moving_average(tensaoR);
delay(100);

if(tensaoR >110){
digitalWrite(LED1, LOW);
FALTA1 = "OK";
}
else if (tensaoR <110){
digitalWrite(LED1, HIGH);
FALTA1 = "FORA";
}

emon2.calcVI(20,2000);
tensaoS = emon2.Vrms; // FASE S
adc_noise2 = moving_average(tensaoS);
delay(100);

if(tensaoS >110){
digitalWrite(LED2, LOW);
FALTA2 = "OK";
}
else if (tensaoS <110){
digitalWrite(LED2, HIGH);
FALTA2 = "FORA";
}
emon3.calcVI(20,1000);
tensaoT = emon3.Vrms; // FASE T
adc_noise3 = moving_average(tensaoT);
delay(100);

if(tensaoT <110){
digitalWrite(LED3, LOW);
FALTA3 = "OK";
}
else if (tensaoT >110){
digitalWrite(LED3, HIGH);
FALTA3 = "FORA";
}

//=========================GERADOR===========================================//

statusger = digitalRead (gerador);

if ( statusger == HIGH){
gert = "LIGADO";
}
else if
(statusger == LOW)
{
gert = "DESLIGADO";

}
//====================================================================//

//============================ PÁGINA HTML ========================================//
EthernetClient client = server.available();
if (client)
{

    boolean currentLineIsBlank = true;
    while (client.connected()) 
    {
        if (client.available())
        {   
            char c = client.read(); 
            
            if (c == '\n' && currentLineIsBlank) 
            {
                
                client.println("HTTP/1.1 200 OK");
                client.println("Content-Type: text/html");
                client.println("Connection: close");
                client.println();
                client.println("<meta http-equiv='Content-Type' content='text/html; charset=UTF-8'>");
                client.println("<link rel='shortcut icon' href='https://www.google.com/s2/favicons?domain=http://tvcultura.com.br/' type='image/x-icon'>");
                client.println("<center>");
                client.println("<font color=\"#000000\" size=\"9\" face=\"Black\"><strong> TORRE SUMARE</strong></font></td><td>&nbsp</td></tr></table><br>");
                client.println("<HR SIZE=15 font color=##008000>");
                client.println("<title>TORRE SUMARE</title>");
                client.println("<body>");
                client.println("<h1>Medicao de energia eletrica </h1>");
                client.println("<h>QDX TRIFASICO  380Vac - 13,8 KV </h>");
                client.println("</body>");
                client.println("<h1>FASE R </h1>");
                client.println(adc_noise1,0);
                client.print(F("Volts"));
                client.println("<h1>FASE R </h1>");
                client.println(FALTA1);
                client.println("<h1>FASE S </h1>");
                client.println(adc_noise2,0);
                client.print(F("Volts"));
                client.println("<h1>FASE S </h1>");
                client.println(FALTA2);
                client.println("<h1>FASE T </h1>");
                client.println(adc_noise3,0); 
                client.print(F("Volts"));
                client.println("<h1>FASE T </h1>");
                client.println(FALTA3);
                client.println("<h1> GRUPO GERADOR </h1>");
                client.println(gert);       
                client.println("</body>");
                client.println("</html>");
                client.print("<meta http-equiv=\"refresh\" content=\"15 \">");  
                break;  
            }
            
            if (c == '\n') 
            {
                currentLineIsBlank = true;
            } 
            else if (c != '\r') 
            {
                currentLineIsBlank = false;
            }
        } 
    }          
    delay(10);           
    client.stop();         
}

}

long moving_average(int sig){
int i;
long acc = 0;
for(i = num; i > 0; i--) values[i] = values[i-1];
values[0] = sig;
for(i = 0; i < num; i++) acc += values[i];
return acc / num;
}
//================================================================================================================================================================//

2

Hi @andz_96
please re-edit your post so your code is shown as a code-section

Demo-Code.section

// This is an empty example-code 
// Your complete sketch schould look like this
// in its own window which is a code-section
void setup() {

  
}


void loop() {
  
}
3

You have only one array to track the moving average. You need 3 of them (one for each channel).
You may look at circular buffers. (You are moving around data in your buffer. That takes a lot of time. Instead, you could move around a pointer...

1 Like
4

There is a "movingAvg" library that will allow you to easily set up a separate moving average for each input.

#include <movingAvg.h>          // https://github.com/JChristensen/movingAvg

movingAvg avg1(num);
movingAvg avg2(num);
movingAvg avg3(num);
1 Like
5

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.