聲學(xué)多普勒流速儀是應(yīng)用于河流、明渠及管道等工況的流速流量檢測(cè)儀器。其采用超聲波探測(cè)技術(shù)，測(cè)量精度高、穩(wěn)定性好、受環(huán)境因素影響小，無(wú)轉(zhuǎn)動(dòng)件、維護(hù)頻次低、工作可靠性高，是便攜流速流量測(cè)量的產(chǎn)品。在聲學(xué)領(lǐng)域中，當(dāng)聲源與接收體（即探頭和反射體）之間有相對(duì)運(yùn)動(dòng)時(shí)，回聲的頻率將有所變化，此種頻率的變化稱之為頻移，即多普勒效應(yīng)。聲波頻率在移向觀察者時(shí)變高，遠(yuǎn)離觀察者時(shí)變低。多普勒流速儀通過(guò)計(jì)算頻率變化計(jì)算流速。
一、產(chǎn)品簡(jiǎn)介
聲學(xué)多普勒流速儀是應(yīng)用于河流、明渠及管道等工況的流速流量檢測(cè)儀器。其采用超聲波探測(cè)技術(shù)，測(cè)量精度高、穩(wěn)定性好、受環(huán)境因素影響小，無(wú)轉(zhuǎn)動(dòng)件、維護(hù)頻次低、工作可靠性高，是便攜流速流量測(cè)量的產(chǎn)品。
原理：在聲學(xué)領(lǐng)域中，當(dāng)聲源與接收體（即探頭和反射體）之間有相對(duì)運(yùn)動(dòng)時(shí)，回聲的頻率將有所變化，此種頻率的變化稱之為頻移，即多普勒效應(yīng)。聲波頻率在移向觀察者時(shí)變高，遠(yuǎn)離觀察者時(shí)變低。多普勒流速儀通過(guò)計(jì)算頻率變化計(jì)算流速。
二、應(yīng)用領(lǐng)域
海綿城市、河長(zhǎng)制管理、內(nèi)河監(jiān)測(cè)、自然河流、明渠、管道、養(yǎng)殖等場(chǎng)景。
三、主要特點(diǎn)
- 可測(cè)量管道、渠道、天然河流流量、流速、水位。
- 單只流速傳感器，安裝方便適合市政污下水管渠道、不滿管管道、各種渠道、不規(guī)則河道、天然溪、排污口等流量測(cè)量，并可隱蔽安裝，可做到長(zhǎng)期穩(wěn)定工作。
- 可提供瞬時(shí)流量值和累計(jì)流量值。
- 2.8寸彩色屏幕，文本配合圖形，方便操作及流態(tài)分析。☆
- 可存儲(chǔ)一萬(wàn)條數(shù)據(jù)，可通過(guò)附贈(zèng)U盤導(dǎo)出數(shù)據(jù)。☆
- 傳感器功耗低：測(cè)流速時(shí)功耗<0.8W。☆
- 中英文操作界面，支持一鍵切換。☆
- 內(nèi)置充電鋰電池，待機(jī)時(shí)間超過(guò)8小時(shí)。
- 內(nèi)置壓力式水位傳感器，溫度傳感器。
四、技術(shù)指標(biāo)
| 參數(shù) | 范圍 | 精度 | 分辨率 |
| 流速范圍 | 0.020m/s～6.00m/s☆ | ±1.0%±1mm/s | 1mm/s |
| 水溫測(cè)量 | -10℃～60℃ | ±0.1（℃） | 0.1（℃） |
| 水深測(cè)量范圍 | 0.03米～10m | 0.3%±0.5cm | 1mm |
| 瞬時(shí)流量范圍 | 0.001～9999m3/h☆ | ±3% | 0.001m3/s |
| 累計(jì)流量 | 0.001～9999m3☆ | ±3% | 0.001m3 |
五、性能指標(biāo)
| 參數(shù) | 范圍 | 備注 |
| 工作電壓 | 10.0V～12.6V DC |
|
| 電池容量 | 1800mAh☆ |
|
| 整機(jī)功耗 | 小于2.4w | 12V供電 |
| 工作時(shí)長(zhǎng) | 大于8小時(shí) |
|
| 線纜長(zhǎng)度 | 20m |
|
| 工作水深 | 小于10m |
|
| 數(shù)據(jù)更新周期 | 1次/秒☆ |
|
六、使用要求
1. 導(dǎo)氣電纜線含有導(dǎo)氣管，不能過(guò)度彎折，防止其折斷；切忌把導(dǎo)氣電纜當(dāng)流速儀的繩纜，用導(dǎo)氣電纜拖拽多普勒流速儀；
2. 探頭前面的圓形超聲波換能器不能受到?jīng)_擊及劃傷；
3. 儀器探頭應(yīng)避免在太陽(yáng)下長(zhǎng)時(shí)間暴曬，以免溫度太高而引起故障；
4. 在泥沙濃度較大的地方使用聲學(xué)多普勒流量計(jì)要定期清理超聲波換能器和壓力傳感器上的淤泥,防止淤泥把壓力傳感器堵塞。
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內(nèi)容范圍精度
流速范圍(m/s) 0.020米/秒 ~ 5.00米/秒+1.0%+1mm/s
水溫測(cè)量(°C) -10°C ~60°C +0.1 (°C)
水深測(cè)量范圍(m) 0.05米 ~ 10米0.5%士0.5cm
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多普勒流速儀廠家：能夠自動(dòng)校正環(huán)境因素（如溫度、壓力等）對(duì)測(cè)量結(jié)果的影響，確保每一次測(cè)量都能得到準(zhǔn)確無(wú)誤的數(shù)據(jù)。無(wú)論是清澈見(jiàn)底的溪流，還是渾濁湍急的江河，甚至是復(fù)雜多變的海域，便攜式多普勒流速儀都能游刃有余地應(yīng)對(duì)，為水文研究、水資源管理、防汛抗旱等工作提供強(qiáng)有力的數(shù)據(jù)支持。
聲學(xué)多普勒流速儀是一種的流速測(cè)量設(shè)備，它基于多普勒效應(yīng)的原理，采用遙距測(cè)量的方式，利用超聲波對(duì)距離探頭一定距離的采樣點(diǎn)進(jìn)行測(cè)量。這種流速儀能夠準(zhǔn)確、快速地獲取水體的流速信息，廣泛應(yīng)用于水利、海洋、環(huán)境監(jiān)測(cè)等領(lǐng)域。
