SENSORS AND ACTUATORS Autoshop 101（传感器和执行器Autoshop 101）.pdfVIP

SENSORS ACTUATORS SENSORS AND ACTUATORS Computer controlled systems continually A digital signal is a voltage signal that is monitor the operating condition of todays either on or off with nothing in between. A vehicles. Through sensors, computers switch is the simplest type of digital signal receive vital information about a number of sensor. The signal from the switch could be conditions, allowing minor adjustments to be 0 volts when off and 12 volts when on. Analog made far more quickly and accurately than signals on the other hand have continuously mechanical systems. Sensors convert variable voltage. A good example is the temperature, pressure, speed, position and coolant temperature sensor. The coolant other data into either digital or analog temperature sensor may vary the voltage electrical signals. signal anywhere between 0 volts and 5 volts depending on the temperature of the engine. Page 1 © Toyota Motor Sales, U.S.A., Inc. All Rights Reserved. SENSORS ACTUATORS The digital signal is the easiest for the The Sensors and Actuators section is divided computer to understand because it reads the into the following areas: signal as either on or off. The analog signal must be conditioned or converted to Resistive sensors: digital so the computer can understand it. potentiometers (This will be covered later.) thermistors piezo resistive While a vehicle may have many