What is the classification of sensors?
3 Answers
Sensors can be classified into: 1. By the physical quantity measured, including displacement, force, speed, temperature, flow, and other sensors; 2. By working principle, including resistive, capacitive, inductive, voltage, Hall effect, photoelectric, grating, thermocouple, and other sensors; 3. By the nature of the output signal, including switch-type sensors, analog-type sensors, and digital-type sensors that output pulses or codes. Automotive sensors are input devices for a car's computer system. They convert various operational conditions of the vehicle, such as speed, temperatures of different mediums, and engine operating conditions, into electrical signals that are transmitted to the computer, ensuring the engine operates in an optimal state.
The classification of sensors mainly depends on their functions. For example, temperature sensors monitor changes in engine coolant temperature; position sensors, such as the throttle position sensor, inform the computer how much the pedal is pressed; speed sensors specifically track rotational speeds, like how fast the wheels are turning; pressure sensors measure oil pressure, tire pressure, etc.; and gas sensors, such as oxygen sensors, monitor the composition of gases in the exhaust pipe. These classifications help car owners better understand what various sensors are doing, making it easier to diagnose issues when they arise. Of course, each sensor in the car is a small expert, some responsible for engine health, others for safety braking—just don't let them fail at critical moments.
Sensors can be categorized based on their location in the vehicle. For example, in the engine compartment, there are the crankshaft position sensor and camshaft sensor. In the chassis section, wheel speed sensors are used for the ABS system, and tire pressure sensors monitor the tires. On the exterior of the vehicle, rain sensors automatically activate the wipers, and light sensors adjust headlight brightness. Inside the cabin, seat pressure sensors determine if someone is seated, and steering wheel torque sensors assist with power steering. This classification method is quite intuitive, making it easier to troubleshoot issues by directly targeting specific areas during repairs. Sensors act like the vehicle's sensory organs, promptly detecting abnormalities. Regular maintenance should include cleaning to prevent dirt from affecting accuracy, ensuring safe and worry-free driving.
