Activity 2

How does capacitance sensing work?

• By measuring changes in capacitance between electrodes caused by the presence of a conductive object.

• By detecting changes in temperature around the electrodes.

• By measuring changes in resistance between electrodes caused by the presence of a conductive object.

• By analyzing the sound waves emitted by a conductive object.

Give an example of an application of inductive sensors.

• Space exploration

• Medical diagnosis

• Industrial automation

• Agricultural irrigation

What type of sensors are used to detect magnetic fields?

• Gyroscopes

• Accelerometers

• Magnetometers

• Hall effect sensors

Explain the principle of piezoelectric sensors.

• Piezoelectric sensors measure temperature changes.

• Piezoelectric sensors generate an electric charge in response to mechanical stress.

• Piezoelectric sensors detect magnetic fields.

• Piezoelectric sensors convert light into sound waves.

What are some common applications of thermal sensors?

• Space exploration

• Weather forecasting

• Food packaging

• Temperature monitoring in industrial processes, HVAC systems, medical devices, automotive systems, and consumer electronics.

What factors affect the capacitance in capacitive sensing?

• Temperature of the environment, shape of the sensor, manufacturer of the device

• Area of the sensing electrode, dielectric constant, distance between electrodes

• Material of the sensing electrode, frequency of the input signal, color of the sensor

• Voltage applied to the sensor, size of the circuit board, type of solder used

In what industries are inductive sensors commonly used?

• Agriculture

• Textile

• Automotive, Manufacturing, Food and Beverage, Packaging

• Healthcare

How are magnetic field sensors used in navigation systems?

• Magnetic field sensors are used in navigation systems to detect the Earth's magnetic field and determine orientation and direction.

• Magnetic field sensors in navigation systems are used to measure temperature changes.

• Navigation systems use magnetic field sensors to detect sound waves.

• The primary function of magnetic field sensors in navigation systems is to monitor air pressure.

What are the different types of thermal sensors?

• Thermocouples, RTDs, thermistors, infrared sensors, semiconductor-based sensors

• Pressure sensors

• Thermal cameras

• Humidity sensors

What is the role of a Wheatstone bridge in resistance-based sensors?

• To measure small changes in resistance by detecting voltage differences when the bridge becomes unbalanced.

• To measure temperature variations instead of resistance

• To convert resistance changes into digital signals

• To amplify resistance values for better accuracy