Podcast
Questions and Answers
Which component is NOT typically part of a measurement chain?
Which component is NOT typically part of a measurement chain?
- Actuator
- Power Supply (correct)
- Sensor
- Control System
A calibration curve is essential for interpreting the data from an actuator.
A calibration curve is essential for interpreting the data from an actuator.
False (B)
What is the primary function of an actuator in an automated system?
What is the primary function of an actuator in an automated system?
affect the environment
An Arduino board, serving as a control system, relies on a central ________ to process information.
An Arduino board, serving as a control system, relies on a central ________ to process information.
Match the sensor with its corresponding output type:
Match the sensor with its corresponding output type:
What is the role of code loaded onto an Arduino board in the context of a measurement chain?
What is the role of code loaded onto an Arduino board in the context of a measurement chain?
The electrical value output by a sensor remains constant, regardless of the input quantity it's measuring.
The electrical value output by a sensor remains constant, regardless of the input quantity it's measuring.
What type of information does a calibration curve provide about a sensor?
What type of information does a calibration curve provide about a sensor?
An LED that lights up to signal that a device is on is an example of an ________.
An LED that lights up to signal that a device is on is an example of an ________.
In a measurement chain, which component directly interacts with the physical environment by sensing changes?
In a measurement chain, which component directly interacts with the physical environment by sensing changes?
A motor that moves a robotic arm is classified as a sensor.
A motor that moves a robotic arm is classified as a sensor.
What is the purpose of using a thermistor?
What is the purpose of using a thermistor?
The output of a pressure sensor is usually in the form of a ________ signal.
The output of a pressure sensor is usually in the form of a ________ signal.
Match the component to its function:
Match the component to its function:
Which of the following best describes the relationship between input and output in a sensor, as defined by its calibration curve?
Which of the following best describes the relationship between input and output in a sensor, as defined by its calibration curve?
Once a sensor is calibrated, its calibration curve never changes, regardless of environmental conditions or aging.
Once a sensor is calibrated, its calibration curve never changes, regardless of environmental conditions or aging.
List three different physical quantities that sensors can measure.
List three different physical quantities that sensors can measure.
The specific type of output from a thermistor is ______.
The specific type of output from a thermistor is ______.
What is the significance of the control system in a measurement chain?
What is the significance of the control system in a measurement chain?
Actuators directly measure physical quantities in the environment.
Actuators directly measure physical quantities in the environment.
Flashcards
What is a sensor?
What is a sensor?
An electronic component that sends varying amounts of electricity based on a physical stimulus.
What is a calibration curve?
What is a calibration curve?
The relationship between a sensor's input and output physical quantities, often shown as a graph.
What is an actuator?
What is an actuator?
An electronic component that affects the surrounding environment, based on commands from the control system.
What is a control system?
What is a control system?
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What is a measurement chain?
What is a measurement chain?
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What is temperature-based automation?
What is temperature-based automation?
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What is a thermistor?
What is a thermistor?
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What is a pressure sensor?
What is a pressure sensor?
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What is an accelerometer?
What is an accelerometer?
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Study Notes
- Robots, measurement chains, and automated systems share a common principle: a control system (like an Arduino), sensors that read environmental information, and actuators that produce effects on the environment.
- Temperature information can be used to trigger an alarm, and light levels can control lighting.
Sensors
- A sensor is an electronic component that sends varying amounts of electricity based on temperature, light, acceleration, or pressure.
- The electrical value output by the sensor varies with the input quantity.
- The output can be voltage, current, or resistance usable by the control system.
- A thermistor has a resistance output that depends on the input temperature.
- A pressure sensor has a voltage output that depends on the input pressure.
- An accelerometer has a voltage output that depends on the input acceleration.
Calibration Curve
- Using a sensor requires knowing the relationship between the input and output physical quantities; this is the calibration curve.
- The calibration curve relates the output (resistance) to the input (temperature) for a thermistor sensor.
- If a thermistor outputs 1000 ohms, the temperature is 22 degrees Celsius according to the calibration curve.
Actuators
- An actuator is an electronic component that affects the surrounding environment.
- Examples include a motor that moves a wheel, an LED indicating power, or a speaker emitting a warning sound.
Control System
- An Arduino board acts as a control system, with a microprocessor at its core.
- Code must be loaded onto the Arduino to command actuators based on sensor information.
Key Takeaways
- A measurement chain includes a control system, a sensor, and an actuator.
- Using a sensor requires its calibration curve, which relates output physical quantity to input physical quantity.
- The control system needs code to ensure actuators are commanded correctly based on sensor data.
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