Why Mark Sensors Often Mis-detect and How to Fix It

Mark sensors are widely used in automation and robotics to identify and distinguish colors. However, many users experience inaccurate detection. Below are common causes and solutions.

Causes

1. Ambient light interference: strong sunlight or bright lights can disrupt the sensor's reflection-based operation.

2. Surface reflectivity: very glossy or very rough surfaces affect reflected light intensity and sensor readings.

3. Sensor calibration: sensors may drift over time; periodic recalibration is necessary.

4. Mark characteristics: very small marks or colors with low contrast are harder to detect.

5. Sensor position: distance and angle between sensor and mark affect signal strength.

Solutions

1. Control ambient light: use shading or uniform lighting to reduce interference.

2. Select appropriate materials and mark finishes to ensure consistent reflectivity.

3. Recalibrate regularly using a standard color chart.

4. Adjust sensor position and angle to fall within optimal detection range.

5. Use high-quality sensors with strong anti-interference performance for critical applications.