? 發問時間: 社會與文化語言 · 1 0 年前

有關SENSOR的問題

1.what is the difference between precision and accuracy of a sensor?

2.what is the difference between active and passive sensor?

有人知道這兩題要怎麼回答嗎?~^^謝謝囉

(英文回答佳)

2 個解答

評分
  • YOO
    Lv 5
    1 0 年前
    最佳解答

    以下是我的見解啦 供您參考

    1.what is the difference between precision and accuracy of a sensor?

    Ans:

    Accuracy is measured as the ratio of the highest deviation of a value

    represented by the sensor to the ideal value. So, it is the ability of a

    measurement to match the actual value of a quantity being measured.

    Precision is a statistical measurement of repeatability. So, it is the

    ability of a measurement to be consistently reproduced.

    2.what is the difference between active and passive sensor?

    Ans:

    Passive sensors generate electric signals without energy consumption from electronic circuits. Whereas, active sensors require an operating signal which is provided by an excitation circuit.

    希望對你有幫助啊

    參考資料: ME
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  • 1 0 年前

    1.what is the difference between precision and accuracy of a sensor?

    Accuracy is defined as, "The ability of a measurement to match the actual value of the quantity being measured". If in reality it is 34.0 F outside and a temperature sensor reads 34.0 F, then than sensor is accurate.

    Precision is defined as, "(1) The ability of a measurement to be consistently reproduced" and "(2) The number of significant digits to which a value has been reliably measured". If on several tests the temperature sensor matches the actual temperature while the actual temperature is held constant, then the temperature sensor is precise. By the second definition, the number 3.1415 is more precise than the number 3.14

    2.what is the difference between active and passive sensor?

    Passive sensors can only be used to detect energy when the naturally occurring energy is available. For all reflected energy, this can only take place during the time when the sun is illuminating the Earth. There is no reflected energy available from the sun at night. Energy that is naturally emitted (such as thermal infrared) can be detected day or night, as long as the amount of energy is large enough to be recorded.

    Active sensors, on the other hand, provide their own energy source for illumination. The sensor emits radiation which is directed toward the target to be investigated. The radiation reflected from that target is detected and measured by the sensor. Advantages for active sensors include the ability to obtain measurements anytime, regardless of the time of day or season.

    參考資料: show me the money!!!! Canada Centre for Remote
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