Steel Detector Utilizing IndusBoard Coin

A metallic detector is an instrument that detects the close by presence of metallic. These units are helpful for locating metallic objects on the floor, underground, and even underwater. A show may be linked to the IndusBoard coin wherein the password may be entered or it may additionally used to only to provide the command of getting into the password saved on the board relying on how it’s programmed.

On this challenge, IndusBoard is programmed to work as a metallic detector. Magnetometer sensor is used to detect close by magnetic fields; at any time when a metallic comes near the board, there are fluctuations in magnetometer readings that are programmed to detect close by metallic.

Parts Required

Arduino Code

 #embody <Wire.h> 
#embody <LSM303AGR_ACC_Sensor.h> 
#embody <LSM303AGR_MAG_Sensor.h> 
#outline SerialPort Serial 
// Initialize elements 
LSM303AGR_ACC_Sensor Acc(&Wire); 
LSM303AGR_MAG_Sensor Magazine(&Wire); 
// Baseline magnetometer values 
float baselineMag[3]; 
float magThreshold = 100.0; // Threshold for detecting metallic 
// Perform prototype for calibrateBaseline() 
void calibrateBaseline(); 
void setup() { 
// Initialize serial communication 
SerialPort.start(115200); 
// Initialize I2C communication 
Wire.start(); 
// Initialize the accelerometer and magnetometer 
if (Acc.start() != 0) { 
SerialPort.println("Didn't initialize LSM303AGR accelerometer!"); 
whereas (1); 
} 
if (Magazine.start() != 0) { 
SerialPort.println("Didn't initialize LSM303AGR magnetometer!"); 
whereas (1); 
} 
// Allow the accelerometer and magnetometer 
Acc.Allow(); 
Magazine.Allow(); 
// Calibrate baseline magnetometer readings 
calibrateBaseline(); 
} 
void loop() { 
// Learn accelerometer and magnetometer knowledge 
int32_t accData[3], magData[3]; 
Acc.GetAxes(accData); 
Magazine.GetAxes(magData); 
// Calculate magnitude of the present magnetometer readings 
float magMagnitude = sqrt(sq(magData[0]) + sq(magData[1]) + sq(magData[2])); 
// Calculate magnitude of the baseline magnetometer readings 
float baselineMagnitude = sqrt(sq(baselineMag[0]) + sq(baselineMag[1]) + sq(baselineMag[2])); 
// Examine for metallic detection 
if (abs(magMagnitude - baselineMagnitude) > magThreshold) { 
SerialPort.println("Steel detected!"); 
} else { 
SerialPort.println("No metallic detected."); 
} 
// Output sensor knowledge for debugging 
SerialPort.print("Acc[mg]: "); 
SerialPort.print(accData[0]); 
SerialPort.print(" "); 
SerialPort.print(accData[1]); 
SerialPort.print(" "); 
SerialPort.print(accData[2]); 
SerialPort.print(" | Magazine[uT]: "); 
SerialPort.print(magData[0]); 
SerialPort.print(" "); 
SerialPort.print(magData[1]); 
SerialPort.print(" "); 
SerialPort.print(magData[2]); 
SerialPort.println(); 
delay(500); // Modify delay as wanted 
} 
void calibrateBaseline() { 
int32_t magData[3]; 
Magazine.GetAxes(magData); 
// Retailer baseline magnetometer readings 
baselineMag[0] = magData[0]; 
baselineMag[1] = magData[1]; 
baselineMag[2] = magData[2]; 
SerialPort.println("Baseline calibration accomplished."); 
} 

Writer(s): Manjeet Vishwakarma,  Abhay Verma and Satywanti Kundu are B.Tech ECE college students at GJUS&T HISAR