Wind Sensor rev C4 Fritzing FileThe Wind Sensor Rev. C is our low-cost anemometer with an analog output, that is designed for use with electronic projects. It is a thermal anemometer based on a traditional technique for measuring wind speed called the “hot-wire” technique. This  involves heating an element to a constant temperature and then measuring the electrical power that is required to maintain the heated element at temperature as the wind changes. The wind velocity is proportional the heat (i.e. power) applied to the sensor.
    Wind Sensor Rev C4 Fritzing 文件Wind Sensor Rev. C 是我們的低成本風速計，帶有模擬輸出，專為電子項目而設計。它是一種基於測量風速的傳統技術的熱風速計，稱為“熱線”技術。這涉及將元件加熱到恆定溫度，然後測量隨著風的變化將加熱元件保持在溫度所需的電功率。風速與施加到傳感器上的熱量（即功率）成正比。

    Hot wire anemometers are available in hand-held packages resembling multimeters, and tend to cost about $300 but this is the first small sensor suitable for electronic experiments.

    The hot wire technique excels at low to medium wind speed, and is the preferred technique for sensing indoor air movement, where the spinning cup anemometers typically seen on weather stations are ineffective. As an experimenters tool, the sensor is exquisitely sensitive, with a small puff of air being sensed at a distance of 18-24″.
    熱線技術在中低風速下表現出色，是檢測室內空氣運動的首選技術，而氣象站上常見的旋轉杯式風速計則無效。作為實驗工具，該傳感器非常靈敏，可以在 18-24 英寸的距離內感應到一小股空氣。

    Possible applications include human breath detection, room occupancy detection, HVAC system monitoring, weather stations and many more.
    可能的應用包括人體呼吸檢測、房間佔用檢測、HVAC 系統監控、氣象站等等。

    It has five pins with three signal pins plus power and ground. Below is a little chart of the pins functions. The latest version of the sensor, with a more accurate op amp, runs fine between four and five volts, but it will not work at higher voltages. The Arduino calibration sketch (link below) is premised on a regulated five volt supply, so the sketch won’t work accurately at other voltages.
    它有五個引腳，三個信號引腳加上電源和地。下面是引腳功能的小圖表。最新版本的傳感器帶有更精確的運算放大器，可以在 4 到 5 伏之間正常運行，但在更高的電壓下無法正常工作。Arduino 校準草圖（下面的鏈接）以穩定的 5 伏電源為前提，因此該草圖在其他電壓下無法準確工作。

    The sensor can be switched off to save power, but at start-up needs to be allowed to warm up about 10 seconds to thermally stabilize for best accuracy. This time interval allows the sensing thermistor to heat up to operating temperature. It’s probably also not a good idea to hang the sensor power supply off a microcontroller pin, even an Atmel pin, if best accuracy is a concern, as the sensor draws a bit of current (~25 mA) and the current will also fluctuate with wind speed. The Wind Sensor includes a small trimpot that is used to calibrate the sensor for zero wind. Calibration is simple. Simply put a glass over the sensor to block any breeze and adjust the pot for the desired zero level. We calibrate the sensors roughly for .5V of output at zero wind with a six volt supply, but you are free to calibrate as desired. A lower calibration point, say .2 V will result in a little more sensing capability at the high end. Using a higher voltage supply will require recalibration. Do not use supplies higher than about 10 volts. A regulated supply is highly recommended.
      可以關閉傳感器以節省電量，但在啟動時需要預熱約 10 秒以達到熱穩定以獲得最佳精度。這個時間間隔允許傳感熱敏電阻加熱到工作溫度。如果需要考慮最佳精度，將傳感器電源掛在微控制器引腳（甚至 Atmel 引腳）上也可能不是一個好主意，因為傳感器會消耗一點電流（~25 mA）並且電流也會隨著風速。風傳感器包括一個小型微調電位器，用於校準零風傳感器。校準很簡單。只需在傳感器上放一個玻璃杯即可阻擋任何微風，並將鍋調整到所需的零位。我們使用 6 伏電源在零風時將傳感器大致校準為 0.5V 的輸出，但您可以根據需要自由校準。較低的校準點，假設 0.2 V 會在高端產生更多的感測能力。使用更高電壓的電源將需要重新校準。不要使用高於約 10 伏的電源。強烈建議使用穩壓電源。

+V	Power 5 volts regulated voltage for best results – formerly 5-10 volts 　　電源 5 伏調節電壓以獲得最佳效果 - 以前為 5-10 伏
Out	Output voltage. This is the voltage at RV multiplied by about three and shifted by the setting on the potentiometer. This output voltage will saturate (hit Ground or +V) if the ambient temperature changes much from the temperature when the sensor was calibrated. The sensitivity of this output can be changed by by swapping out R11. Higher sensitivity will make the sensor saturate more easily with ambient temperature change. 　　　輸出電壓。這是 RV 處的電壓乘以大約 3 並通過電位計上的設置偏移。如果環境溫度與傳感器校準時的溫度變化很大，則該輸出電壓將飽和（接地或 +V）。該輸出的靈敏度可以通過換出 R11 來改變。更高的靈敏度將使傳感器更容易隨著環境溫度的變化而飽和。
RV	This is the raw loop voltage and the output to use for calibrated output. it will not saturate. It won’t go below about 1.8 volts at room temperature either. This voltage is not affected by the calibration potentiometer. The output of the sensor is logarithmic, which means the sensor can capture very slight air movements at the low end, but also not saturate at full output until the air-flow reaches about 60 miles per hour. The Arduino sketch for use with the wind sensor is constructed to use this pin as output. 　　這是原始環路電壓和用於校準輸出的輸出。它不會飽和。在室溫下它也不會低於約 1.8 伏。該電壓不受校準電位器的影響。傳感器的輸出是對數的，這意味著傳感器可以在低端捕獲非常輕微的空氣運動，但在氣流達到每小時 60 英里左右之前也不會在全輸出時飽和。與風傳感器一起使用的 Arduino 草圖被構造為使用此引腳作為輸出。
TMP	A temperature output. This is just a voltage divider resistor and thermistor. It will read about 2.8 volts at room temperature and go down with higher temperatures and up with lower temperatures. It will never saturate. An algorithm to translate voltage into temperature is included in the example sketch below. 溫度輸出。這只是一個分壓電阻和熱敏電阻。它在室溫下讀數約為 2.8 伏，隨著溫度升高而降低，隨著溫度降低而升高。它永遠不會飽和。將電壓轉換為溫度的算法包含在下面的示例草圖中。