本文關(guān)鍵詞： 超聲水位計(jì) 流量 測(cè)量 滾波特征參數(shù) 薄層水流 坡面　出處：《農(nóng)業(yè)工程學(xué)報(bào)》2017年03期 　論文類型：期刊論文

【摘要】：精確高效的觀測(cè)手段是深入研究坡面薄層水流特性的基礎(chǔ)。基于系統(tǒng)集成理論和自動(dòng)化測(cè)量原理,結(jié)合高精度超聲波水位傳感器,研制坡面水流滾波特征參數(shù)測(cè)量系統(tǒng)。在光面玻璃床面,5種坡度和5種單寬流量條件下進(jìn)行實(shí)際測(cè)量應(yīng)用,評(píng)價(jià)測(cè)量系統(tǒng)的精確度及穩(wěn)定性,并與人工測(cè)針法和目測(cè)法測(cè)量結(jié)果比較分析。結(jié)果表明,測(cè)量數(shù)據(jù)相對(duì)誤差為0.23%,變異系數(shù)為0.66%;測(cè)量系統(tǒng)和傳統(tǒng)測(cè)量方法測(cè)得的滾波波峰值最為接近,滾波頻率、波速和波長(zhǎng)的接近程度依次減弱;相比人工測(cè)量方法,超聲波測(cè)量操作簡(jiǎn)便,自動(dòng)化程度高且能夠進(jìn)行持續(xù)穩(wěn)定觀測(cè),具有較好地測(cè)量精度和可靠性,能夠滿足坡面水流滾波特性研究需求。研究成果在坡面水流測(cè)量手段改進(jìn)方面具有廣闊的運(yùn)用前景。
[Abstract]:Accurate and efficient observation method is the basis of deep research on the characteristics of thin layer flow on slope surface. Based on the theory of system integration and the principle of automatic measurement, combined with high precision ultrasonic water level sensor, A measuring system for the characteristic parameters of rolling wave of sloping water flow is developed. The practical application of the measurement system is carried out under the conditions of five slopes and five kinds of single wide flow on the smooth glass bed, and the accuracy and stability of the measurement system are evaluated. The results show that the relative error of the measured data is 0.23, the coefficient of variation is 0.66, the peak value of the rolling wave measured by the measurement system and the traditional measurement method is the closest, and the frequency of the wave is the highest, and the relative error of the measured data is 0.23 and the coefficient of variation is 0.66. Compared with manual measurement, ultrasonic measurement is easy to operate, has high degree of automation and can be observed continuously and stably, and has better measurement accuracy and reliability. The research results can meet the needs of the research on the characteristics of the rolling wave of the slope flow, and the research results have a broad application prospect in improving the measurement method of the flow on the slope.
【作者單位】： 西北農(nóng)林科技大學(xué)水利與建筑工程學(xué)院;中國(guó)水利水電科學(xué)研究院水資源研究所;
【基金】：流域水循環(huán)模擬與調(diào)控國(guó)家重點(diǎn)實(shí)驗(yàn)室自主研究課題(2015ZY01、2015TS01) 國(guó)家自然科學(xué)基金青年基金項(xiàng)目(51209222) 中國(guó)水利水電科學(xué)研究院基本科研業(yè)務(wù)費(fèi)專項(xiàng)項(xiàng)目(WR0145B022016)
【分類號(hào)】：S157;TV131.2
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本文編號(hào)：1529334