CN100451574C - 料位指示器 - Google Patents

料位指示器 Download PDF

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CN100451574C
CN100451574C CNB2005100994639A CN200510099463A CN100451574C CN 100451574 C CN100451574 C CN 100451574C CN B2005100994639 A CNB2005100994639 A CN B2005100994639A CN 200510099463 A CN200510099463 A CN 200510099463A CN 100451574 C CN100451574 C CN 100451574C
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sensor
axle
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CN1760647A (zh
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R·布里尔
K·黑默尔
K·菲尔埃克
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Maschinenfabrik Reinhausen GmbH
Scheubeck GmbH and Co
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
    • G01D5/147—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the movement of a third element, the position of Hall device and the source of magnetic field being fixed in respect to each other
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
    • G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/2006—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
    • G01D5/2033—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils controlling the saturation of a magnetic circuit by means of a movable element, e.g. a magnet
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
    • G01D5/241—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by relative movement of capacitor electrodes
    • G01D5/2417—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by relative movement of capacitor electrodes by varying separation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
    • G01F23/36—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements using electrically actuated indicating means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D2205/00—Indexing scheme relating to details of means for transferring or converting the output of a sensing member
    • G01D2205/70—Position sensors comprising a moving target with particular shapes, e.g. of soft magnetic targets
    • G01D2205/73—Targets mounted eccentrically with respect to the axis of rotation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D2205/00—Indexing scheme relating to details of means for transferring or converting the output of a sensing member
    • G01D2205/70—Position sensors comprising a moving target with particular shapes, e.g. of soft magnetic targets
    • G01D2205/77—Specific profiles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D2205/00—Indexing scheme relating to details of means for transferring or converting the output of a sensing member
    • G01D2205/70—Position sensors comprising a moving target with particular shapes, e.g. of soft magnetic targets
    • G01D2205/77—Specific profiles
    • G01D2205/777—Whorl-shaped profiles

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
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  • Fluid Mechanics (AREA)
  • Level Indicators Using A Float (AREA)
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Abstract

本发明涉及一种料位指示器，其同样允许视觉指示和产生一模拟的电信号。为此在指示轴上安装一圆盘，指示轴设有用于视觉指示的指示器。此外设置一测量距离的传感器，其中在其与圆盘之间具有空气隙。通过圆盘的不同于圆形的外形在指示轴旋转时改变该空气隙的大小，结果产生一个模拟的电信号作为测得的料位的量度。

Description

料位指示器
技术领域
本发明涉及一种料位指示器，特别用于测量在一个变压器、一个扼流圈或一个分接开关的油膨胀箱中的料位。
背景技术
一种这样的料位指示器由EP 1315179 A1是已知的。其具有一传感器部分和一指示部分，其中，传感器部分装入应该测量其料位的油膨胀箱中并且具有一个浮标和一个与浮标连接的浮标杆。其中，浮标杆将浮标的升降运动作为旋转运动传到一根轴上，该轴又与指示部分的一根指示轴连接。该指示轴一方面带有一个指示器，它与一个数字盘一起能够实现料位的视觉指示。该指示轴另一方面与一个角度编码器力锁合相连接，后者包括一磁毂和一非接触式与其协同操作的信号发生器并且产生一测得的料位的电模拟信号。因此利用已知的料位指示器不仅可以视觉指示而且同时可以产生作为测得的料位的量度的电模拟信号。
该已知的料位指示器在实际中已证明是适用的。但由于必需的角度编码器其耗费是较大的，在角度编码器设置在一单独的轴上并且该轴经由两个带轮和一个刻度盘传动绳或一连接带驱动时，尤其如此。
发明内容
本发明的目的是，提供一种尽可能简单构成的开头所述型的料位指示器，其同样允许视觉指示和产生一模拟的电信号。
根据本发明，提出一种料位指示器，用于测量在一个变压器、一个扼流圈或一个分接开关的油膨胀箱中的料位，包括一个传感器部分和一个指示部分，其中，传感器部分装入应该测量其料位的油膨胀箱内并且具有一个浮标和一个与浮标连接的浮标杆，其中，浮标杆将浮标的升降运动作为旋转运动传到一根轴上，该轴又与指示部分的一根指示轴连接，其中，指示轴带有一个指示器，该指示器对应于一个数字盘；并且设有一个产生电信号的转角传感器，它在指示部分中与指示轴连接；其特征在于，设置一个测量距离的传感器作为转角传感器；在指示轴上固定安装一个由影响电场或磁场的材料构成的圆盘；圆盘具有随角度而不同的半径，使得其端面的外形不同于圆形；指示部分中的传感器设置成使其有效的功能范围对准圆盘的外形，以致在传感器与圆盘之间保留一个可随圆盘的相应位置改变的空气隙。
发明的总的构想在于，作为转角传感器，亦即作为电信号发生器，在一料位指示器中设置一测量距离的传感器。一这样的传感器在其有效的表面上建立一个场，将一待检测的距离元件置入该传感器的场中，因此场强度变化。传感器评估该场强度变化并提供一正比于距离元件到传感器的间距的模拟的电流或电压信号。
特别有利的是，在本发明中作为距离元件设置一渐开线形状的圆盘。该圆盘的半径随指示轴的转角成正比地增大。在该指示轴固定该圆盘。如果使一这样的圆盘经过所述的传感器旁边旋转，则因此根据相应的当前的转角放大或减小圆盘与传感器之间的空气隙。借此按简单的方式产生一正比于相应的转角、即正比于指示轴的摆幅并从而正比于料位的模拟的输出信号。
附图说明
以下还要借助附图示例性地更详细地说明本发明。其中：
图1一本发明的料位指示器的示意的侧剖视图；
图2其又示意的俯视图；
图3作为本发明的距离元件的渐开线形圆盘的示意图，亦即
a)端面外形相对于转心具有可变的半径的真实尺寸，
b)直线的展开图。
具体实施方式
一个基板1支承整个的料位指示器。在其上借助一个螺钉2和一个弹簧垫圈3安装一个夹持支架4，在夹持支架4上又用另一螺钉5安装一电缆走线架6和一接线板7用以连接只以示意方式示出的电导线。在中间通过装置延伸一可旋转的指示轴8，其支承于一轴承9中，并且具有一在一端在其上固定的指示器10，后者本身对应于一个数字盘11，其设有关于料位高度的相应的标志。在数字盘11的下方，装置的前面由一挡板12关闭。在该挡板12的上部为其活动的铰接设有铰链弹簧13。一螺钉15用于数字盘11在一数字盘支架14上的固定。数字盘支架14又借助具有内螺纹的螺柱16和在侧面嵌入的螺钉17和18固定在基板上。在指示轴8的自由端，即远离指示器10的那一侧，设有一电磁离合器19用于指示轴8与图中只示意的另一轴20的连接。该另一轴20按已知方式传递一未示出的在相应的油膨胀箱中的浮标的转换为旋转运动的升降运动，该油膨胀箱的料位应该被检测。至此该料位指示器相当于由开头所述的EP 1315179 A1已知的现有技术。
按照本发明在基板1上设置一测量距离的传感器21，其有效表面指向指示轴8。电导线22导向该传感器21，该电导线22只是示意的。在指示轴8上按照本发明的另一特征固定安装一圆盘23作为距离元件用以改变测量距离的传感器21的场强度。圆盘23包括一种材料，其引起由传感器21产生的场的场强度的变化。
圆盘23构成渐开线形状的，其半径在一规定的角度范围内连续变化。圆盘23还具有一径向的螺纹孔24，其安装一夹紧螺钉25用以固定在指示轴8上。本发明的范围内圆盘23在指示轴8上的其他的固定方式自然也是可能的，在这里只想提及指示轴8的制齿接合的实施形式或键槽/键连接。圆盘23具有一端面的外形26，其离转心即指示轴8的距离在一规定的角度范围α连续变化。
由一传感器支架27和一螺钉28实现传感器21在基板1上的固定，其中支架27包围传感器21。
测量距离的传感器本身是已知的并在商业上是可供使用的。其例如由MICRO-EPSILON公司在互联网上说明于网址http://www.capancdt.de/abstandssensor.htm中或也由BaumerElectric AG，CH公司提供并且其中描述于网址http://www.baumerelectric.com/baumer/bauer/boxd.html中。
图3中再次详细示出圆盘23的端面的外形26；其示意地示出，其在两个极限值a和b内的距离沿一角度α如何连续变化。
如待检测的膨胀箱中的料位改变，则(未示出的)浮标的升降变化按由现有技术已知的方式转换为轴20的旋转运动并且经由电磁离合器19和指示轴8。因此一方面指示轴8上指示器10相对于数字盘11的摆幅改变，这实现料位的视觉指示。另一方面由于圆盘23在传感器21旁边转动经过，改变圆盘23与传感器21之间的空气隙。结果传感器21产生一正比于指示轴8的转角的电输出信号作为检测到的料位的量度。
图盘23的端面的外形26的尺寸选择成使在图3中所示的角度α相当于数字盘11上的最小标志与最大标志之间的角度，即指示器10最大扫过的角度-这同时是指示轴8的最大可能的转角。这在宽的极限方面是可改变的。同样，圆盘23关于其端面的外形26的相对升高的尺寸，亦即值a与b之间的在一图3中所示的规定的角度α上的差值也是可改变的。
在本发明的范围内，该外形26的众多的其他的实施形式和几何形状也是可能的。例如可以通过一相应的几何形状达到关于测量范围的非按比例的信号输出，其可以抑制规定的测量范围等。
由传感器21产生的模拟的电输出信号也可以按已知的方式例如经由一个RS485接口进行进一步的处理。
附图标记清单
1    基板          18    螺钉
2    螺钉          19    电磁离合器
3    弹簧垫圈      20    轴
4    夹持支架      21    传感器
5    螺钉          22    电导线
6    电缆走线架    23    圆盘
7    接线板        24    螺纹孔
8    指示轴        25    夹紧螺钉
9    轴承          26    端面的外形
10   指示器        27    传感器支架
11   数字盘        28    螺钉
12   挡板
13   铰链弹簧
14   数字盘支架
15   螺钉
16   螺柱
17   螺钉

Claims (3)

1.料位指示器，用于测量在一个变压器、一个扼流圈或一个分接开关的油膨胀箱中的料位，包括一个传感器部分和一个指示部分，其中，传感器部分装入应该测量其料位的油膨胀箱内并且具有一个浮标和一个与浮标连接的浮标杆，其中，浮标杆将浮标的升降运动作为旋转运动传到一根轴(20)上，该轴(20)又与指示部分的一根指示轴(8)连接，其中，指示轴(8)带有一个指示器(10)，该指示器对应于一个数字盘(11)；并且设有一个产生电信号的转角传感器，它在指示部分中与指示轴(8)连接；其特征在于，设置一个测量距离的传感器(21)作为转角传感器；在指示轴(8)上固定安装一个由影响电场或磁场的材料构成的圆盘(23)；圆盘(23)具有随角度而不同的半径，使得其端面的外形(26)不同于圆形；指示部分中的传感器(21)设置成使其有效的功能范围对准圆盘(23)的外形(26)，以致在传感器(21)与圆盘(23)之间保留一个可随圆盘(23)的相应位置改变的空气隙。
2.按照权利要求1所述的料位指示器，其特征在于，圆盘(23)由金属构成。
3.按照权利要求1或2所述的料位指示器，其特征在于，圆盘(23)的外形(26)构成渐开线形的或至少部分偏心轮形状的。
CNB2005100994639A 2004-10-14 2005-09-06 料位指示器 Expired - Fee Related CN100451574C (zh)

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US7191648B2 (en) 2007-03-20
US20060081046A1 (en) 2006-04-20
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CA2523113C (en) 2014-07-22
ATE386926T1 (de) 2008-03-15
EP1647814A2 (de) 2006-04-19

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