光纤涡街流量计

本文章主要介绍了：光纤涡街流量计,哪里有涡街流量计制造商,涡街流量计探头线断了怎么办,光纤涡街流量计等信息

前置信号放大电路的主要功能及其要求1、涡街流量计信号放大模块的设计要求由于涡街流量计的测量原理可知，涡街流量计是根据检测到的频率值换算流体流量的流量检测装置。因此，对涡街探头所输出信号的频率进行准确的测量就成为涡街流量计信号放大电路的主要功能。此外，还要通过静态水容积检定实验对不同检定点的仪表系数进行标定。设计十要求仪表线性度误差不超过1%，重复性误差不超过线性度误差的1/3~1/2。2、放大电路设计的主要内容1)流体通过漩涡发生体后将会产生，卡门漩涡作用于探头上的横向应力在压电效应的作用下会产生微弱的电荷(电压)信号，对于这部份信号要通过电荷放大器对其进行放大并输出。2)用负反馈放大电路对电荷放大器输出的电压信号进一步放大并输出。3)设置低通滤波器，对信号中的高频干扰进行衰减滤波。4)设置滞回比较器电路，将信号转换成规则的方波信号以便进行频率的测量。5)当整体放大电路版设计完成之后，焊接电路，并利用宏业公司提供的静态水容积法流量标准装置进行检定实验检验放大电路是否淸足设计要求以进行进一步的修改工作。
(光纤涡街流量计)

有五种方式：铁路公路、航空、水运、和管道运输。其中管道运输虽早已有之，但应用并不普遍。随着环保问题的突出，管道运输的特点引起人们的重视。管道运输必须装备流量计，它是控制、分配和调度的眼睛，亦是安全监没和经济核算的必备工具。
涡街流量计主要存在问题及其解决方法
主要存在的问题主要有
涡街流量计分析及解决方法
总结引起这些问题的主要原因，主要涉及到以下方面：
涡街流量计[3]安装对直管段的要求：
涡街流量计安装对直管段的要求是非常重要的。它的详细要求如下：
流量计对安装点上的上下游直管段一定的要求，否则会影响测量精度。饱和水蒸气密度及铂电阻-温度对照表分度号：Pt100R0=100.00Ω压力为绝对压力温度压力密度铂电阻温度压力密度铂电阻温度压力密度铂电阻℃barkg/mΩ℃barkg/mΩ℃barkg/mΩ1001.10330.5997138.501383.4141.864152.831769.1374.723166.981011.05000.6108138.881393.5131.915153.201779.3534.829167.351021.08780.6388139.261403.6141.967153.581789.5744.937167.721031.12670.6601139.641413.7172.019153.951799.7985.048168.091041.16680.6321140.021423.8232.073154.3218010.0275.160168.461051.20800.7046140.391433.9312.129154.7018110.2595.274168.831061.25040.7277140.771444.0422.185155.0718210.4965.391169.201071.29410.7515141.151454.1552.242155.4518310.7385.509169.571081.33900.7758141.531464.2712.301155.8218410.9835.629169.941091.38520.8008141.911474.3982.361156.1918511.2335.752170.311101.43270.8265142.291484.5102.422156.5718611.4885.877170.681111.48150.8528142.661494.6342.484156.9418711.7476.003171.051121.53160.8798143.041504.7602.584157.3118812.0106.132171.421131.58320.9075143.421514.8892.613157.6918912.2786.264171.791141.63620.9359143.801525.0212.679158.0619012.5516.397172.161151.69060.9650144.171535.1552.747158.4319112.8296.533172.531161.74650.9948144.551545.2932.816158.8119213.1116.671172.901171.80391.025144.931555.4332.886159.1819313.3986.812173.261181.86281.057145.311565.5772.958159.5519413.6906.955173.631191.92331.089145.681575.7323.032159.9319513.9877.100174.001201.98541.122146.061585.8723.106160.3019614.2987.248174.371212.04921.155146.441596.0253.182160.6719714.5967.398174.741222.11451.190146.811606.1813.260161.0419814.9097.551175.101232.18161.225147.191616.3393.339161.4219915.2267.706175.471242.25041.261147.571626.5023.420161.7920015.5497.864175.841252.32101.298147.941636.6673.502162.1620115.8778.025176.211262.39331.336148.321646.8363.586162.5320216.2108.188176.571272.46751.375148.701657.0083.671162.9020316.5498.354176.941282.54351.415149.071667.1833.758163.2720416.8938.522177.311292.62151.455149.451677.3623.847163.6520517.2438.694177.681302.70131.497149.821687.5453.937164.0220617.5988.868178.041312.78311.539150.201697.7314.029164.3920717.9599.045178.411322.86701.583150.571707.9204.123164.7620818.3269.225178.781332.95281.627150.951718.1144.218165.1320918.6999.408179.141343.04101.672151.331728.3114.316165.5021019.0779.593179.511353.13101.719151.701738.5114.415165.8721119.4629.782179.881363.22301.766152.081748.7164.515166.2421219.8529.974180.241373.31701.815152.451758.9244.618166.6121320.24910.17180.61附录续附表一饱和水蒸气密度及铂电阻-温度对照表分度号：Pt100R0=100.00Ω压力为绝对压力温度压力密度铂电阻温度压力密度铂电阻温度压力密度铂电阻℃barkg/mΩ℃barkg/mΩ℃barkg/mΩ21420.65110.37180.9725241.13820.69194.8029074.4639.16208.4521521.06010.57181.3425341.83121.05195.1629175.5539.81208.8121621.47510.77181.7125442.53421.42195.5229276.6540.48209.1721721.86910.98182.0725543.24621.79195.8829377.7741.15209.5221822.32411.19182.4425643.96722.17196.2429478.9041.83209.8821922.75811.41182.8025744.69722.55196.6029580.0442.53210.2422023.19811.62183.1725845.43722.94196.9629681.1943.24210.5922123.64511.84183.5325946.18523.33197.3329782.3643.96210.9522224.09912.07183.9026046.94323.73197.6929883.5344.69211.3122324.56012.30184.2626147.71124.14198.0529984.7245.43211.6622425.02712.53184.6326248.48824.55198.4130085.9346.19212.0222525.50112.76184.9926349.27524.97198.7730187.1246.96212.3722625.98213.00185.3626450.07125.40199.1330288.3747.75212.7322726.47013.24185.7226550.87725.83199.4930389.6248.54213.0922826.96513.49186.0926651.69326.27199.8530490.8749.36213.4422927.46713.74186.4526752.51926.72200.2130592.1450.18213.8023027.97614.00186.8226853.35627.17200.5730693.4351.02214.1523128.49314.25187.1826954.20227.63200.9330794.7351.88214.5123229.01614.52187.5427055.05828.10201.2930896.0452.75214.8623329.54714.78187.9127155.92528.57201.6530997.3653.64215.2223430.08615.05188.2727256.80229.06202.0131098.7054.54215.5723530.63215.33188.6327357.68929.55202.36311100.0155.47215.9323631.18615.61189.0027458.58730.04202.72312100.1456.40216.2823731.74715.89189.3627559.49630.55203.08313100.2857.36216.6423832.31716.18189.7227660.41531.06203.44314100.4258.33216.9923932.89316.47190.0927761.34631.58203.80315100.5659.33217.3524033.47816.76190.4527862.28732.11204.16316100.7060.34217.7024134.07117.06190.8127963.23932.65204.52317100.8561.37218.0524234.67217.37191.1828064.20233.19204.88318100.9962.43218.4124335.28117.68191.5428165.17633.75205.23319101.1463.50218.7624435.89817.99191.9028266.16234.31205.59320101.2964.60219.1224536.52318.31192.2628367.15834.88205.95325102.0670.45220.8824637.15718.64192.6328468.16735.47206.31330102.8676.99222.6524737.79918.97192.9928569.18636.06206.67335103.7184.36224.4124838.44919.30193.3528670.21836.66207.02340104.6192.76226.1724939.10819.64193.7128771.26137.27207.38345105.55102.4227.9225039.77619.99194.0728872.31537.89207.74350106.54113.6229.6725140.45220.36194.4428973.38238.52208.10355107.58127.2231.42
(光纤涡街流量计)

(光纤涡街流量计)

和田复工企业广州空气机流量计压缩空气流量计
和田复工企业广州空气机流量计压缩空气流量计
LUGB系列智能涡街流量计,主要用于管道介质流体的流量测量,如气体、液体、蒸气等多种介质。除了具有前述涡街流量计的特点外，还具有以下特点： 1、一体化程度高，无需外供电，就地显示瞬时流量和累积流量，功耗低，锂电池可连续工作一年以上。 2、软件功能丰富，可预设温度、压力值，输入断线、出错时自动代用设定值进行补偿。 3、防盗，采用一体化结构，内部电池供电，参数密码锁定等功能有效防止人为或意外造成的累计值的偏差。 4、高防护等级，由于采用一休化结构，仪表***防护等级可达到IP68
(光纤涡街流量计)

1.6
320
370590
335
295
12－φ23
200
30
41
符合GB/T9119—2000的要求。


选型及计算







1、流量计的口径应根据最大使用流量Qv来选择，为了获得尽可能宽的使用流量范围,使用最大流量应不小于流量计额定最大流量Qmax的1/2。流量计的线性流量范围对应的雷诺范围2×104～7×106。液体表可根据图6直接查表2选用，而气体表则应计算出工况状态的流量范围后根据图7查表2选用，测量饱和蒸汽查表3。
(光纤涡街流量计)

如果把旋涡频率设为f，把旋涡发生体与流体迎面接触宽度设为d，把流速设为υ，则三者关系如下:
St被称为斯特劳哈尔数(StrouhalNumber)，是由旋涡发生体的形状和尺寸决定的无量纲参数。
当将旋涡发生体分割成适当的形状时，在广泛的雷诺数(ReynoldsNumber)范围内，斯特劳哈尔数(StrouhalNumber)可视为常数，这样就不受流体的密度与黏度等影响，旋涡频率f就与流速υ成正比。
式(1)也适用于管道中的流体，通过测量旋涡频率f，以及管道的横截面积和流速v，可以测量流量Q。
梯形横截面旋涡发生体的斯特劳哈尔数(StrouhalNumber)与雷诺数(ReynoldsNumber)的关系如下图所示:
(光纤涡街流量计)

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