CN107667289A - 安装在流体容器上的包括流体传感器、温度传感器和处理设施的用于确定流体性质的现场设备 - Google Patents

安装在流体容器上的包括流体传感器、温度传感器和处理设施的用于确定流体性质的现场设备 Download PDF

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CN107667289A
CN107667289A CN201680028809.2A CN201680028809A CN107667289A CN 107667289 A CN107667289 A CN 107667289A CN 201680028809 A CN201680028809 A CN 201680028809A CN 107667289 A CN107667289 A CN 107667289A
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frequency
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杰弗里·艾伦·西尔斯
格雷戈里·迈克尔·利奇
玛丽安娜·伊丽莎白·威廉斯
里恩·阿兹法尔·阿什拉夫
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Rosemount Measurement Ltd
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Abstract

本发明提供了一种被配置成通过容器中的单一安装孔来进行装配的现场设备。该设备优选地包括振动音叉和温度传感器,来自振动音叉和温度传感器的信号在设备内被处理以提供指示与该设备接触的介质的性质是高于阈值还是低于阈值的输出。该输出可以被无线地传送至远程位置。描述了其他特征。

Description

安装在流体容器上的包括流体传感器、温度传感器和处理设 施的用于确定流体性质的现场设备
技术领域
本发明涉及现场设备,并且更特别涉及但不一定完全地涉及振动音叉现场设备。
背景技术
安装在容器壁中的振动音叉现场设备提供了用于检测容器中的分界面的存在的可靠并且方便的手段。然而,如果存在多个分界面和/或乳剂层,则检测分界面的存在和成分是困难的并且可能成本较高。当分离例如水中的甲醇、柴油和绿色柴油以及黑液和肥皂时,分界面可能不明显。此外,如果最上面的分界面具有高介电常数(dk),则由于雷达信号不能穿透至较低的分界面,所以使用基于雷达的检测仪器是不可行的;而且,如果层之间的介电常数小于10dk,则雷达信号难以识别分界面。雷达也难以穿透超过几英寸厚的乳剂层。
根据一般的测量单一处理介质中的多个变量并且向远程位置传送测量数据的期望或需要,必须考虑上述因素。然而,通常必须采用多个仪器,这不仅增加安装了成本,而且需要进行穿过处理容器的壁的多次侵入。这违背了安全最佳实践。
本发明的目的是提供将至少某种程度上解决前述问题和需求或者将至少提供新颖并且有用的选择的现场设备。
发明内容
因此,在第一方面,本发明提供了一种现场设备,该现场设备具有:安装件,其能够穿过容器的壁进行接合;第一传感器,其定位在所述安装件上,并且能够操作以响应于所述容器内的与所述传感器接触的介质的性质的变化来生成频率信号的变化;第二传感器,其定位在所述安装件上,并且能够操作以响应于在所述容器内并且与所述第二传感器接触的所述介质的温度的变化来生成温度信号的变化。所述现场设备还包括:处理设施,其定位在所述安装件上,并且能够操作以接收源自于所述第一传感器和所述第二传感器的信号、使用来自所述第二传感器的信号向来自所述第一传感器的信号施加温度补偿并且生成指示所述介质的性质是高于阈值还是低于阈值的输出信号;以及通信设施,其能够操作以向远程位置传送所述输出信号。
优选地,所述安装件包括凸缘以与所述容器接合,所述第一传感器和所述第二传感器被定位至所述凸缘的一侧,并且所述处理设施被定位至所述凸缘的相对侧。
优选地,所述处理设施能够操作以在频率、温度或者源自于频率、温度的性质落在一个或更多个界限之外的情况下生成警报信号。
优选地,所述现场设备还包括本地操作者接口,所述本地操作者接口能够操作以使得能够设置所述阈值。
优选地,所述通信设施被配置并且能够操作以使得能够设置所述阈值。
优选地,所述现场设备是电池供电的。
优选地,所述性质是密度。
可替选地,所述性质是粘度。
可替选地,所述性质是酒精含量。
可替选地,所述性质是糖分含量。
可替选地,所述性质是所述介质的污染。
优选地,所述通信设施还能够操作以报告频率和温度读数以及指示所述性质的数据。
在第二方面,本发明提供了一种确定容器中包含的流体的性质是高于阈值还是低于阈值的方法,所述方法使用振动音叉现场设备,该振动音叉现场设备以依赖于与所述现场设备接触的所述流体的性质的频率来振动,所述方法包括以下步骤:
通过所述容器的壁中的单个穿透部来插入所述现场设备;
使所述现场设备以第一频率振动;
响应于所述流体的性质的变化来记录第二频率,所述第二频率是所述第一频率的变化;
使用通过所述单个穿透部插入到所述容器中的温度传感器来向所述第一频率和所述第二频率施加温度补偿;
在所述现场设备内处理温度补偿的第一频率和温度补偿的第二频率,以得到指示所述性质是高于阈值还是低于阈值的变量;以及
将所述变量无线地传送至远程位置。
优选地,所述方法还包括响应于所述变量越过所述阈值来实现切换操作。
优选地,所述方法被应用来确定介质的密度或者介质的随着密度而变化的性质是高于阈值还是低于阈值。
通过阅读以下描述,本领域的技术人员将明晓在可以执行本发明的方式方面的许多变化。下面的描述不应当被认为是限制性的,而应当认为仅是对执行本发明的一种方式的说明。在适当的情况下,无论是否特别提及,任何元件或部件均应当被认为包括其任何或全部等效物。
附图说明
现在将参照附图描述本发明,在附图中:
图1示出了根据本发明的在处理容器上安装就位的现场设备的视图;
图2示出了图1所示的设备的示意性功能图;
图3示出了在没有温度补偿的情况下在湿时和在干时传感器频率的变化的曲线图;
图4示出了在没有温度补偿的情况下针对不同的流体性质(在该示例中是密度)传感器频率随着不同温度的变化;以及
图5示出了在温度补偿之后针对不同的流体性质(在该示例中是密度)传感器频率随着不同温度的变化。
具体实施方式
首先参照图1,本发明提供了具有接合在容器8的壁7中的穿透部或孔中的安装件6的现场设备5。设备5包括:第一传感器10,其定位在安装件6上,并且能够操作以响应于容器8内的与传感器10接触的介质的变化来生成频率信号的变化;以及第二传感器11,其也定位在安装件6上,并且能够操作以响应于在容器8中且与第二传感器11接触的介质的温度变化来生成温度信号的变化,但是应当理解,传感器11可以直接并入到传感器10中。现场设备5还包括处理设施12,处理设施12定位在安装件6上,并且能够操作以从源自于传感器10和传感器11的信号得到与传感器10和传感器11接触的介质的至少一个性质。
本领域的技术人员将理解的是,可以方便地以振动音叉的形式提供传感器10,而传感器11优选地包括温度探头。当流体分界面15上升或下降为与传感器10接触时,通常将经历频率和温度的变化。这些变化可以直接被输出以指示分界面15处于现场设备5的位置,或者频率和温度信号可以在处理设施15中被处理以产生其他感兴趣的信息,其示例将在下面更详细地描述。
在示出的特定形式中,安装件6包括凸缘18以与壁7中的孔19接合。可以看到,传感器10和传感器11定位在凸缘的一侧而处理设施12定位在凸缘的相对侧。这确保了传感器定位在容器8的内部,而处理设施定位至容器的外部。
具有振动音叉液位开关的形式的现场设备通常用于指示液体的存在或不存在。通常,在湿与干之间振动音叉传感器的谐振频率的变化超过在干的情况下的频率的20%。因此,使用相对粗略的频率测量来检测湿与干之间的差异是简单的。然而,本发明主要涉及当传感器10持续浸没在特定流体中时监测流体性质。更特别地,本发明不太涉及确定对于特定性质的准确测量,而是涉及性质是高于还是低于阈值或切换点。
如图3所示,振动音叉传感器的谐振频率也随着温度而变化,但是温度系数通常足够低使得频率的变化不会显著影响传感器报告湿(下面的线)与干(上面的线)之间的变化的水平。然而,在传感器被用于指示介质的性质例如液体密度的变化的应用中,传感器总是湿的,并且为了检测性质的目标变化而要测量的频率的变化明显较小。参照图4,示出了频率随着五种不同密度的介质的温度而变化的曲线图。如所示的,根据传感器材料和介质密度,测量的频率值通常随着温度的增加而减小。因此,不能指定特定频率值来表示介质的两个或更多个密度值之间的阈值。
现在参照图5,将温度补偿添加至频率值可以产生更稳定的频率测量,因此,然后可以指定介质的两个或更多个密度值之间的一个或更多个阈值或切换点。
许多流体性质例如粘度、酒精含量、糖分含量以及污染随着密度而变化,并且因此振动音叉现场设备的振动频率也将随着这些性质的变化而变化。
因此,对传感器接触的介质的认识意味着可以识别指示介质的性质的频率点或设定点。特别地,性质是高于还是低于对处理操作者而言有意义的值。
返回至图2,来自传感器10和传感器11的信号可以分别在20和21处输出以提供频率和温度的诊断指示。此外,来自传感器10和传感器11的信号被导向计算块22,在该计算块22中频率被转换成派生变量,派生变量是用户或操作者感兴趣的介质的性质。派生变量可以是例如密度、粘度、酒精含量、糖分含量或者污染程度。现场设备可以在制造的地方和时间处进行配置以在特定目标变量处切换,或者可以使用本地操作者接口设施26在现场进行配置,该设施还优选地被配置成指示来自传感器10和传感器11的输出以及来自计算块22的派生变量。该实施方式还示出了使用在功能上与处理块22相互链接的通信设施27。设施27使得能够从远程地点配置该设备,并且还提供向远程地点传送派生变量以及来自传感器10和传感器11的输出的手段。
为了与提供多变量低成本设备的目的保持一致,通信设施27是无线通信设施。
图2还图示了在功能上与传感器10和传感器11以及计算块22链接的警报设施28。在频率、温度或派生变量落在确定的参数之外的情况下,警报设施28在例如29和30处输出警报信号。警报信号也可以使用通信设施27来传送至远程位置。
所描述的现场设备5可以从有线连接或者从一个或更多个电池来供电。
因此,将理解的是,本发明提供了可以通过对容器的单一侵入来执行与该容器中包含的介质有关的各种测量的现场设备。来自包含在设备中的传感器的数据在设备内部被处理以提供指示介质的一个或更多个性质的输出值或状态。鉴于单一设备中包括测量、数据处理和输出控制,所以采购、安装、调试和维护的成本降低,并且安全性增强。

Claims (15)

1.一种现场设备,具有:安装件,其能够穿过容器的壁进行接合;第一传感器,其定位在所述安装件上,并且能够操作以响应于所述容器内的与所述传感器接触的介质的性质的变化来生成频率信号的变化;第二传感器,其定位在所述安装件上,并且能够操作以响应于在所述容器内并且与所述第二传感器接触的所述介质的温度的变化来生成温度信号的变化;
所述现场设备还包括:处理设施,其定位在所述安装件上,并且能够操作以接收来自所述第一传感器和所述第二传感器的信号、使用来自所述第二传感器的信号向来自所述第一传感器的信号施加温度补偿并且生成指示所述介质的性质是高于阈值还是低于阈值的输出信号;以及通信设施,其能够操作以向远程位置传送所述输出信号。
2.根据权利要求1所述的现场设备,其中,所述安装件包括凸缘以与所述容器接合,所述第一传感器和所述第二传感器被定位至所述凸缘的一侧,并且所述处理设施被定位至所述凸缘的相对侧。
3.根据权利要求1或2所述的现场设备,其中,所述处理设施能够操作以在频率、温度或者源自于所述频率、所述温度的性质落在一个或更多个界限之外的情况下生成警报信号。
4.根据前述权利要求中任一项所述的现场设备,还包括本地操作者接口,所述本地操作者接口能够操作以使得能够设置所述阈值。
5.根据权利要求1至4中任一项所述的现场设备,其中,所述通信设施被配置并且能够操作以使得能够设置所述阈值。
6.根据前述权利要求中任一项所述的现场设备,所述设备是电池供电的。
7.根据前述权利要求中任一项所述的现场设备,其中,所述性质是密度。
8.根据权利要求1至6中任一项所述的现场设备,其中,所述性质是粘度。
9.根据权利要求1至6中任一项所述的现场设备,其中,所述性质是酒精含量。
10.根据权利要求1至6中任一项所述的现场设备,其中,所述性质是糖分含量。
11.根据权利要求1至6中任一项所述的现场设备,其中,所述性质是所述介质的污染。
12.根据前述权利要求中任一项所述的现场设备,其中,所述通信设施还能够操作以报告频率和温度读数以及指示所述性质的数据。
13.一种确定容器中包含的流体的性质是高于阈值还是低于阈值的方法,所述方法使用振动音叉现场设备,所述振动音叉现场设备以依赖于与所述现场设备接触的所述流体的性质的频率来振动,所述方法包括以下步骤:
通过所述容器的壁中的单个穿透部来插入所述现场设备;
使所述现场设备以第一频率振动;
响应于所述流体的性质的变化来记录第二频率,所述第二频率是所述第一频率的变化;
使用通过所述单个穿透部插入到所述容器中的温度传感器来向所述第一频率和所述第二频率施加温度补偿;
在所述现场设备内处理温度补偿的第一频率和温度补偿的第二频率以得到指示所述性质是高于阈值还是低于阈值的变量;以及
将所述变量传送至远程位置。
14.根据权利要求13所述的方法,还包括响应于所述变量越过所述阈值来实现切换操作。
15.根据权利要求13或14所述的方法,所述方法被应用来确定介质的密度或者介质的随着密度而变化的性质是高于阈值还是低于阈值。
CN201680028809.2A 2015-05-18 2016-05-18 安装在流体容器上的包括流体传感器、温度传感器和处理设施的用于确定流体性质的现场设备 Pending CN107667289A (zh)

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