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便攜式直讀流速儀 我有新說(shuō)法
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LS300-A便攜式直讀流速儀采用了輕巧的材質(zhì)和緊湊的結(jié)構(gòu)，使其便于攜帶和操作。無(wú)論是野外實(shí)地考察還是實(shí)驗(yàn)室內(nèi)的測(cè)量工作，都能輕松應(yīng)對(duì)。同時(shí)，其堅(jiān)固耐用的外殼能有效抵抗惡劣環(huán)境的侵蝕，確保設(shè)備的穩(wěn)定性和使用壽命。

一、產(chǎn)品簡(jiǎn)介

LS300-A流速流量測(cè)算儀（簡(jiǎn)稱便攜式流速儀）是專門(mén)為水文站、廠礦、環(huán)保監(jiān)測(cè)站、農(nóng)田排灌、水文地質(zhì)調(diào)查等部門(mén)在野外進(jìn)行明渠流速、流量測(cè)量而研制的。

二、主要用途

LS300-A流速流量測(cè)算儀作為傳統(tǒng)型轉(zhuǎn)子式流速儀器的主要配套產(chǎn)品，用于接收給定時(shí)段內(nèi)流速儀產(chǎn)生的信號(hào)，并由此自動(dòng)測(cè)算出該時(shí)段內(nèi)平均流速、流量、可加擴(kuò)展功能測(cè)量水位、計(jì)算規(guī)則斷面面積。

LS300-A流速流量測(cè)算儀主要適用于接收各種干簧管式流速儀、接觸絲式轉(zhuǎn)子流速儀、光纖式流速儀、霍爾式流速各種流速儀產(chǎn)生的信號(hào)，并具有存儲(chǔ)功能、通訊功能。

LS300-A流速流量測(cè)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(rèn)干簧管式傳感器發(fā)貨。

三、主要技術(shù)性能及參數(shù)

測(cè)速公式：v=a+b*R/T（m/s）（自動(dòng)計(jì)算）

測(cè)速范圍：0.01—4.00m/s（可到5.00m/s）

測(cè)算誤差：≤1.5%

顯示：4*16位液晶顯示

測(cè)量方式：測(cè)桿定位測(cè)量

測(cè)量深度：0.45m

采樣容量：采用mf-89可編程函數(shù)計(jì)算器讀出結(jié)果值

讀取方式：采用mf-89可編程函數(shù)計(jì)算器讀出結(jié)果值

工作溫度：0°C?50°C

功耗：<50mA

電源：DC 7.2V

通訊方式：RS232

時(shí)鐘誤差：小于等于2min/year

發(fā)射原件：原件壽命長(zhǎng)，可達(dá)10000小時(shí)以上；發(fā)射光束穿透力強(qiáng)，可適用于一定濁度的液體

傳感器：采用光纖導(dǎo)光，除非接觸檢測(cè)外，并具有防水耐溫、防爆、抗強(qiáng)磁場(chǎng)和抗電器干擾等優(yōu)點(diǎn)

儀表可以估測(cè)瞬時(shí)流量、累計(jì)流量，關(guān)于流量計(jì)算具灌溉渠道系統(tǒng)量水規(guī)范GB/T201303-201第7部分

四、測(cè)量原理

流速測(cè)量：流速儀在水力推動(dòng)下，其內(nèi)置信號(hào)裝置產(chǎn)生轉(zhuǎn)數(shù)信號(hào)。從而，可根據(jù)某個(gè)單位時(shí)段內(nèi)流速儀產(chǎn)生的信號(hào)總數(shù)，由以下公式計(jì)算出流速：v=a+b*R/T（m/s）

v一測(cè)流時(shí)段內(nèi)平均流速（m/s）

b一旋槳（或旋杯）水力螺距（m）

a-流速儀常數(shù)（m/s）

T一測(cè)流歷時(shí)（s）

R—T時(shí)段內(nèi)流速儀轉(zhuǎn)子的總轉(zhuǎn)數(shù)

對(duì)某個(gè)個(gè)體流速儀來(lái)說(shuō)，b和a為定值。因此，測(cè)流時(shí),只要測(cè)出T和R值，即可計(jì)算出流速。

流量測(cè)量：輸入被測(cè)斷面類型，并手工輸入（或者通過(guò)輔助傳感器測(cè)量）規(guī)則斷面的水位、寬度計(jì)算斷面面積，儀表更具Q=V*S測(cè)算流速Q(mào)值

參考資料

參考資料編輯區(qū)域


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