Ultrasonic Basics & Elements Of Expected Error

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Ultrasonic Basics & Elements Of Expected Error - Quiz

To Better understand ultrasonics and how to apply them.
Please click on the recordings link below to watch the webinar, this webinar is approximately 35 minutes in length. Then procede to the 15 question quiz.
• June 13, 2011 (3 MB) Recording


Questions and Answers
  • 1. 

    Which of the following is true?

    • A.

      A photoelectric uses an L.E.D. to emit light & an ultrasonic sensor has a Transducer to product sound waves

    • B.

      Ultrasonic sensors are available with both discrete and analog outputs

    • C.

      Banner has an excellent selection of ultrasonic sensors to choose from

    • D.

      All of the above

    Correct Answer
    D. All of the above
    Explanation
    All of the statements mentioned in the options are true. A photoelectric sensor does use an L.E.D. to emit light, and an ultrasonic sensor does have a transducer to produce sound waves. Additionally, ultrasonic sensors are indeed available with both discrete and analog outputs. Banner is also known for having an excellent selection of ultrasonic sensors to choose from. Therefore, the correct answer is "All of the above."

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  • 2. 

    What is considered the dead zone of an ultrasonic sensor?

    • A.

      The sensing distance beyond the sensors capabilities

    • B.

      The area directly behind the ultrasonic sensor

    • C.

      The distance from the face of the transducer to where the sensor will reliable detect a target

    • D.

      None of the above

    Correct Answer
    C. The distance from the face of the transducer to where the sensor will reliable detect a target
    Explanation
    The dead zone of an ultrasonic sensor refers to the distance from the face of the transducer to where the sensor will reliably detect a target. This means that any object within this dead zone distance will not be detected by the sensor. The dead zone is an important consideration when using ultrasonic sensors as it affects the accuracy and reliability of the measurements.

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  • 3. 

    What type of applications should you consider an ultrasonic sensor?

    • A.

      Tank level applications including pump control

    • B.

      Web and loop control

    • C.

      Roll diameter

    • D.

      Clear objects

    • E.

      All of the above

    Correct Answer
    E. All of the above
    Explanation
    An ultrasonic sensor can be used in various applications such as tank level applications including pump control, web and loop control, roll diameter measurement, and detecting clear objects. Therefore, all of the above options are valid applications for an ultrasonic sensor.

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  • 4. 

    When applying ultrasonic sensors you should always determine if the target will reflect sound waves back to the sensor.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    When applying ultrasonic sensors, it is important to determine if the target will reflect sound waves back to the sensor. This is because ultrasonic sensors work by emitting sound waves and measuring the time it takes for the waves to bounce back. If the target does not reflect the sound waves, the sensor will not be able to detect it accurately. Therefore, it is necessary to ensure that the target has the ability to reflect sound waves before using ultrasonic sensors.

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  • 5. 

    All ultrasonic sensors are considered (time of flight) technology.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    This statement is false because not all ultrasonic sensors use time of flight technology. Ultrasonic sensors can also use other technologies such as frequency modulation or amplitude modulation. Time of flight technology measures the time it takes for a sound wave to travel to an object and back to the sensor, while other technologies may use different methods to detect objects. Therefore, it is incorrect to say that all ultrasonic sensors use time of flight technology.

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  • 6. 

    Ultrasonic sensor are more sensitive to temperature changes then photoelectric sensors.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Ultrasonic sensors work by emitting sound waves and measuring the time it takes for the waves to bounce back after hitting an object. These sensors are sensitive to temperature changes because temperature affects the speed of sound. As temperature increases, the speed of sound also increases, which can affect the accuracy of the measurements taken by the ultrasonic sensor. On the other hand, photoelectric sensors work by detecting changes in light intensity and are not affected by temperature changes. Therefore, it is true that ultrasonic sensors are more sensitive to temperature changes than photoelectric sensors.

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  • 7. 

    Which of the following can have an effect on the performance on an ultrasonic sensor?

    • A.

      Wind

    • B.

      Temperature

    • C.

      Humidity

    • D.

      All of the above

    Correct Answer
    D. All of the above
    Explanation
    Wind, temperature, and humidity can all have an effect on the performance of an ultrasonic sensor. Wind can cause disturbances in the air that can interfere with the sensor's ability to accurately detect objects. Temperature can affect the speed of sound, which is used by the sensor to calculate distances, leading to inaccuracies. Humidity can also affect the speed of sound and can cause condensation on the sensor, potentially affecting its performance. Therefore, all of these factors can have an impact on the performance of an ultrasonic sensor.

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  • 8. 

    What is meant by the term resolution?

    • A.

      The deviation of the analog output.

    • B.

      Visual clarity of the target being sensed

    • C.

      A measure of the smallest change that can be sensed by a device

    • D.

      All of the above

    Correct Answer
    C. A measure of the smallest change that can be sensed by a device
    Explanation
    Resolution refers to the measure of the smallest change that a device can sense. It is the ability of a device to detect and distinguish between small changes or variations in a signal or input. In this context, resolution is not related to the deviation of the analog output or the visual clarity of the target being sensed.

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  • 9. 

    What factors can effect resolution of an ultrasonic sensor?

    • A.

      Target conditions

    • B.

      Response time of the ultrasonic sensor

    • C.

      External or environmental conditions

    • D.

      All of the above

    Correct Answer
    D. All of the above
    Explanation
    The resolution of an ultrasonic sensor can be affected by various factors. The target conditions, such as the size, shape, and material of the object being detected, can impact the accuracy of the sensor's measurements. The response time of the sensor, which refers to the time it takes for the sensor to detect and process a signal, can also affect the resolution. Additionally, external or environmental conditions, such as temperature, humidity, and interference from other devices, can introduce errors and impact the resolution of the sensor. Therefore, all of the factors mentioned above can influence the resolution of an ultrasonic sensor.

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  • 10. 

    Outdoor applications are recommended for ultrasonic sensors?

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Ultrasonic sensors are not recommended for outdoor applications because they are sensitive to environmental factors such as wind, rain, and temperature changes. These factors can interfere with the accuracy and reliability of the sensor's readings. Therefore, it is not advisable to use ultrasonic sensors in outdoor settings where these environmental factors are present.

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  • 11. 

    There is an ultrasonic sensor that would work excellent for a wash down environment.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The given statement is true because ultrasonic sensors are known for their ability to function well in wash down environments. These sensors are designed to be waterproof and resistant to harsh conditions such as water and chemicals. They can withstand high-pressure water jets and can continue to provide accurate measurements even in wet and damp conditions. Therefore, it can be concluded that an ultrasonic sensor would indeed work excellently in a wash down environment.

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  • 12. 

    Which item below would be the biggest weakness for an ultrasonic sensor?

    • A.

      Smooth surface

    • B.

      A vacuum

    • C.

      Shiny surface

    • D.

      None of the above

    Correct Answer
    B. A vacuum
    Explanation
    A vacuum would be the biggest weakness for an ultrasonic sensor because sound waves require a medium to travel through. In a vacuum, there is no air or any other medium for the sound waves to propagate, therefore rendering the ultrasonic sensor ineffective.

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  • 13. 

    What does the total error consist of?

    • A.

      Resolution

    • B.

      Linearity

    • C.

      Temperature effect

    • D.

      All of the above

    Correct Answer
    D. All of the above
    Explanation
    The total error consists of resolution, linearity, and temperature effect. Resolution refers to the smallest increment that can be measured by the instrument. Linearity refers to how well the instrument's output corresponds to the actual input. Temperature effect refers to the impact of temperature variations on the accuracy of the instrument. All of these factors contribute to the overall error in the measurement.

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  • 14. 

    Ultrasonsic sensors are color dependent.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Ultrasonic sensors are not color dependent. Ultrasonic sensors work by emitting high-frequency sound waves and analyzing the reflected waves to detect objects. The color of an object does not affect the ability of the sensor to detect it. The sensor detects objects based on their physical properties, such as shape, size, and material composition, rather than their color. Therefore, the statement that ultrasonic sensors are color dependent is false.

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  • 15. 

    What is the longest range ultrasonic sensor Banner has to offer?

    • A.

      Q45U Series

    • B.

      T30 Series

    • C.

      QT50 Series

    • D.

      QS18 Series

    Correct Answer
    C. QT50 Series
    Explanation
    The QT50 Series is the longest range ultrasonic sensor offered by Banner.

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