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便攜式流速儀 我有新說法
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　　JD-LS1流速流量測算儀（簡稱便攜式流速儀）是專門為水文站、廠礦、環保監測站、農田排灌、水文地質調查等部門在野外進行明渠流速、流量測量而研制的。

目錄

　　JD-LS1流速流量測算儀（簡稱便攜式流速儀）是專門為水文站、廠礦、環保監測站、農田排灌、水文地質調查等部門在野外進行明渠流速、流量測量而研制的。

　　JD-LS1流速流量測算儀作為傳統型轉子式流速儀器的主要配套產品，用于接收給定時段內流速儀產生的信號，并由此自動測算出該時段內平均流速、流量、可加擴展功能測量水位、計算規則斷面面積。

　　JD-LS1流速流量測算儀主要適用于接收各種干簧管式流速儀、接觸絲式轉于流速儀、光纖式流速儀、霍爾式流速各種流速儀產生的信號，并具有存儲功能、通訊功能。

　　JD-LS1流速流量測算儀在訂貨前需要告知配套使用那種流速儀傳感器，否則按默認干簧管式傳感器發貨。

　　測速公式：v=a+b*R/T（m/s）（自動計算）

　　測速范圍：0.01—4.00m/s（可到5.00m/s）

　　測算誤差：≤1.5%

　　顯示：4*16位液晶顯示

　　測量方式：測桿定位測量

　　測量深度：0.45m

　　采樣容量：采用mf-89可編程函數計算器讀出結果值

　　讀取方式：采用mf-89可編程函數計算器讀出結果值

　　工作溫度：0°C?50°C

　　功耗：<50mA

　　電源：DC 7.2V

　　通訊方式：RS232

　　時鐘誤差：小于等于2min/year

　　發射原件：原件壽命長，可達10000小時以上;發射光束穿透力強，可適用于一定濁度的液體

　　傳感器：采用光纖導光，除非接觸檢測外，并具有防水耐溫、防爆、抗強磁場和抗電器干擾等優點

　　儀表可以估測瞬時流量、累計流量，關于流量計算具灌溉渠道系統量水規范GB/T201303-201第7部分

　　四、測量原理

　　流速測量：流速儀在水力推動下，其內置信號裝置產生轉數信號。從而，可根據某個單位時段內流速儀產生的信號總數，由以下公式計算出流速：v=a+b*R/T（m/s）

　　v一測流時段內平均流速（m/s）

　　b一旋槳（或旋杯）水力螺距（m）

　　a流速儀常數（m/s）

　　T一測流歷時（s）

　　R—T時段內流速儀轉子的總轉數

　　對某個個體流速儀來說，b和a為定值。因此，測流時,只要測出T和R值，即可計算出流速。

　　流量測量：輸入被測斷面類型，并手工輸入（或者通過輔助傳感器測量）規則斷面的水位、寬度計算斷面面積，儀表更具Q=V*S測算流速Q值

參考資料

參考資料編輯區域


目錄

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