大氣能見度測量儀發射端通過紅外led光源發射紅外光，紅外光源透過一定體積的空氣，由空氣中的氣體分子，氣溶膠粒子、霧滴等引起紅外光源散射，能見度測量儀接收端通過接收紅外光源散射光的強度來確定能見距離，同時儀器可對能見度連續測量輸出。
【能見度定義】：大氣能見度定義為具有正常視力的人在當時的天氣條件下還能夠看清楚目標輪廓的大地面水平距離。
【功能介紹】：大氣能見度測量儀發射端通過紅外led光源發射紅外光，紅外光源透過一定體積的空氣，由空氣中的氣體分子，氣溶膠粒子、霧滴等引起紅外光源散射，能見度測量儀接收端通過接收紅外光源散射光的強度來確定能見距離，同時儀器可對能見度連續測量輸出。
【檢測原理】：35°前向散射原理，測量更準確。
【整體外觀】：整體環抱式一體化設計使內部電纜的布局更趨合理。
【測量元件】：光學部件鏡頭，紅外led光源。
①、采用了光學部件鏡頭朝下并帶有防護罩，有效防止降水、飛沫或塵埃進入鏡頭，減少探頭表面的污染，這種設計提供了的測量結果并減少了維護的需要。
②、探頭的防護罩為鋁合金材料，表面涂有防腐蝕的玻璃纖維涂層。
③、能見度儀的過電壓和電磁保護裝置能保證傳感器的長時間安全運行。
④、紅外LED光源，增加濾光設計、抗光源干擾。
⑤、低功耗，內部電路抗干擾設計。
⑥、儀器的直流供電電路具有防反接和自恢復保險雙重設計。
【設備清單】：大氣能見度測量儀1臺+2個抱箍。
①、將能見度傳感器安裝到距離地面大約2米的地方。
②、保證能見度下方不要有別的物體，干擾測試。
③、理想安裝場地應距大型建筑物或其它會產生熱量及妨礙降雨的設施至少100米，而且也要避免樹蔭的影響。
④、場地應無干擾光學測量的障礙物、反射面和明顯的污染源。
⑤、選擇合適地點安裝設備，設備提供安裝抱箍，利用抱箍將設備安裝到75mm立桿上，為避免光源干擾，發射端務必在南側。
【供電方式】：10-30vdc寬壓供電。
【測量范圍】：0-10000m。
【測量誤差】：≤1KM±2%;±10%>1KM。
【分辨率】：1m
【更新間隔】：20s
【平均時間】：（MTBF）大于18000小時
【工作環境溫度】：-40~60℃
【工作相對濕度】：不大于95%（30℃）
【重量】：小于10kg
【功耗】：0.5w
【紅外光波長】：870nm
【信號輸出方式】：RS485，標準modbus-rtu協議
【可測能見度數據種類】：
①、實時能見度數值
②、能見度10min平均值
③、能見度1min平均值
【光學鏡頭潔凈等】：可實時讀取紅外光發射端、接收端的鏡頭潔凈度，清潔度等1-5，5代表清潔度高，當清潔度小于3時需要現場清理光學鏡頭。
1.能見度20-30公里能見度視野清晰
2.能見度15-25公里能見度好視野較清晰
3.能見度10-20公里能見度一般
4.能見度5-15公里能見度較差視野不清晰
5.能見度1-10公里輕霧能見度差視野不清晰
6.能見度0.3-1公里大霧能見度很差
7.能見度小于0.3公里重霧能見度差
8.能見度小于0.1公里濃霧能見度差
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