Exploring Sensor Technologies

What is the basic working principle of a sensor?

• A sensor is used solely for visual detection.

• A sensor generates energy from heat sources.

• A sensor works by detecting physical properties and converting them into measurable signals.

• A sensor only works in digital environments.

How do you select a sensor for a specific application?

• Identify measurement requirements, consider the environment, evaluate specifications, check compatibility, and assess cost.

• Pick a sensor that is the most expensive

• Select a sensor only by its color

• Choose a sensor based on brand popularity

Why are smart sensors important in IoT?

• Smart sensors are important in IoT because they enable real-time data collection and processing, enhancing system efficiency and decision-making.

• Smart sensors are primarily for aesthetic improvements in IoT devices.

• Smart sensors reduce the need for data collection in IoT.

• Smart sensors are only used for security purposes in IoT.

Describe the architecture of a smart sensor.

• A smart sensor architecture is limited to a microcontroller and signal conditioning unit.

• A smart sensor includes a display unit, but no communication interfaces.

• A smart sensor architecture includes a sensing element, signal conditioning unit, ADC, microcontroller, communication interfaces, and a power supply.

• A smart sensor architecture consists of only a sensing element and a power supply.

What is thread modeling in the context of sensors?

• Thread modeling in sensors is the process of identifying and analyzing potential security threats to sensor systems.

• Thread modeling is the process of enhancing sensor performance.

• Thread modeling is a method for calibrating sensor accuracy.

• Thread modeling refers to the physical design of sensor hardware.

What is the difference between static and dynamic vulnerability?

• Static vulnerability is identified through code analysis, while dynamic vulnerability is found during runtime testing.

• Static vulnerability is found during runtime testing, while dynamic vulnerability is identified through code analysis.

• Static vulnerability can only be detected in production environments, while dynamic vulnerability is found in development environments.

• Static vulnerability is related to network security, while dynamic vulnerability pertains to physical security.

How is risk assessment conducted for sensor networks?

• Conducting surveys of user satisfaction

• Ignoring environmental factors affecting sensors

• Implementing new hardware without assessment

• Risk assessment for sensor networks is conducted through identifying threats, evaluating vulnerabilities, analyzing impacts, and determining mitigation strategies.

Name three types of temperature sensors and their applications.

• Piezoelectric sensors - in sound detection systems

• 1. Thermocouples - industrial temperature measurement; 2. Thermistors - household appliances; 3. Infrared sensors - non-contact medical and automotive applications.

• Capacitive sensors - for humidity measurement

• Bimetallic sensors - used in weather stations

What is the function of a proximity sensor?

• To provide audio feedback when an object is detected.

• To measure the temperature of an object.

• The function of a proximity sensor is to detect the presence or absence of an object nearby.

• To calculate the distance between two objects.

How does a pressure sensor work?

• A pressure sensor measures temperature changes.

• A pressure sensor generates sound waves.

• A pressure sensor converts pressure into an electrical signal.

• A pressure sensor detects humidity levels.