How to Use Torque Sensor: Examples, Pinouts, and Specs

A torque sensor is a device that measures and records the torque on a rotating system, such as an engine or a crankshaft. Torque sensors are essential in various applications, including automotive testing, industrial machinery, and robotics. They provide critical data for performance analysis, quality control, and system optimization.

1. Power Supply: Connect the Vcc pin to a 5V DC power supply.
2. Ground: Connect the GND pin to the ground of the power supply.
3. Signal Output: Connect the Signal pin to an analog input pin on a microcontroller (e.g., Arduino UNO).

• Calibration: Ensure the torque sensor is calibrated before use to maintain accuracy.
• Mounting: Securely mount the sensor to avoid vibrations and mechanical stress that could affect readings.
• Temperature: Operate within the specified temperature range to prevent damage and ensure accurate measurements.
• Shielding: Use shielded cables to minimize electrical noise and interference.

// Torque Sensor Example Code
// This code reads the analog signal from the torque sensor and prints the
// torque value to the Serial Monitor.

const int torqueSensorPin = A0; // Analog pin connected to the Signal pin
float torqueValue = 0;          // Variable to store the torque value

void setup() {
  Serial.begin(9600); // Initialize serial communication at 9600 baud rate
}

void loop() {
  int sensorValue = analogRead(torqueSensorPin); // Read the analog value
  torqueValue = (sensorValue / 1023.0) * 100;    // Convert to torque (0-100 Nm)
  
  Serial.print("Torque: ");
  Serial.print(torqueValue);
  Serial.println(" Nm");
  
  delay(500); // Wait for 500 milliseconds before the next reading
}

1. Inaccurate Readings:

   • Solution: Ensure the sensor is properly calibrated and securely mounted. Check for any mechanical stress or vibrations that could affect the readings.

2. No Output Signal:

   • Solution: Verify the power supply connections (Vcc and GND). Ensure the Signal pin is correctly connected to the analog input of the microcontroller.

3. Fluctuating Readings:

   • Solution: Use shielded cables to minimize electrical noise. Ensure the sensor is operating within the specified temperature range.

Q1: How do I calibrate the torque sensor?

• A1: Follow the manufacturer's calibration procedure, which typically involves applying known torque values and adjusting the sensor output accordingly.

Q2: Can I use the torque sensor with a different microcontroller?

• A2: Yes, the torque sensor can be used with any microcontroller that has an analog input pin and operates at 5V DC.

Q3: What should I do if the sensor gets damaged?

• A3: If the sensor is physically damaged, it is recommended to replace it. For minor issues, consult the manufacturer's troubleshooting guide.

Q4: How often should I recalibrate the sensor?

• A4: Recalibration frequency depends on the application and usage. For critical applications, recalibrate periodically as recommended by the manufacturer.

This documentation provides a comprehensive guide to understanding, using, and troubleshooting a torque sensor. Whether you are a beginner or an experienced user, following these guidelines will help you achieve accurate and reliable torque measurements in your projects.