CN1523320A - 电感式传感器和配置此传感器的旋转发送器 - Google Patents

电感式传感器和配置此传感器的旋转发送器 Download PDF

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CN1523320A
CN1523320A CNA2004100058761A CN200410005876A CN1523320A CN 1523320 A CN1523320 A CN 1523320A CN A2004100058761 A CNA2004100058761 A CN A2004100058761A CN 200410005876 A CN200410005876 A CN 200410005876A CN 1523320 A CN1523320 A CN 1523320A
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L·里辛
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Dr Johannes Heidenhain GmbH
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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
    • G01D5/20—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
    • G01D5/204—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 mutual induction between two or more coils
    • G01D5/2053—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 mutual induction between two or more coils by a movable non-ferromagnetic conductive element
    • 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
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/24—Housings ; Casings for instruments
    • G01D11/245—Housings for sensors
    • 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
    • G01D5/02—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 mechanical means
    • G01D5/04—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 mechanical means using levers; using cams; using gearing
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H05K1/144—Stacked arrangements of planar printed circuit boards

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

本发明涉及一种由至少两块印制电路板(1，2)组成的电感式传感器，其中，接收器印刷导线(1.1)设置在第一块印制电路板(1)上，而处理信号用的一个电子处理装置的元件(2.1)则设置在第二块印制电路板(2)上，这些信号是由接收器印制导线(1.1)引起的。两块印制电路板(1，2)拼接成多层结构，且电子处理装置的至少一个元件(2.1)布置在这两块印制电路板(1，2)之间。本发明还包括一个配置该电感式传感器的旋转发送器。

Description

电感式传感器和配置此传感器的旋转发送器
本发明涉及一种按权利要求1前序部分所述的用来确定相对位置尤其是相对角度位置的电感式传感器和一个配置此传感器的按权利要求9所述的旋转发送器。
电感式传感器例如在旋转发送器中用来确定两个相对旋转的机器零件的角度位置，但在测量仪表中也用来确定两个相对纵向移动的机器零件的位置。
在电感式传感器中，励磁线圈和接收机线圈往往以印制导线的形式设置在一块共同的印制电路板上，该印制电路板例如与一个旋转发送器的定子固定连接。在这块印制电路板对面设置有另一块印制电路板，其上按规律的间距设置导电面作为分隔结构，而且这块印制电路板与旋转发送器的转子抗扭连接。当在励磁线圈上加一个电的励磁场时，在转子和定子之间的相对旋转过程中，在接收器线圈内产生与角度位置有关的信号，然后这些信号在一个电子处理装置中进行处理。这种电子处理装置的元件往往设置在另一块印制电路板上。带励磁线圈和接收器线圈的印制电路板与带有电子处理装置的印制电路板往往通过柔性导体和插接件相互连接。这种电连接占用相当大的体积。但另一方面却永远存在使这类传感器或旋转发送器小型化的希望。
DE 101 11 966 A1描述了一种电感式传感器，其励磁线圈和接收器线圈以及电子处理装置的模块做成一块叠层板形式的多层结构。但这种结构的缺点是，对外部影响相当敏感，而且没有达到最佳的空间利用。
所以本发明的目的在于提出一种对外部影响不敏感而且结构容积小的电感式传感器以及一个外形尺寸小的可靠的旋转发送器。
根据本发明，这个目的是通过权利要求1或权利要求9的特征来实现的。
根据本发明，设置接收器印制导线的印制电路板和设置电子处理装置的印制电路板拼接成多层结构，其中，电子处理装置的敏感的电子元件放在这两块印制电路板之间。所以，这些电子元件通过印制电路板保护而不受外部影响。
在本发明的一个优选方案中，这些元件由于放置在对面印制电路板即带有接收器印制导线的印制电路板的一个或多个凹槽中而进一步受到保护。
在本发明的一个优选结构中，至少印制电路板之一具有一个部分的或完整的环形连接条，所以多层拼接的印制电路板之间的缝隙至少被部分地覆盖或完全封闭。在复合印制电路板(由多层拼接成的印制电路板)的外圆周上设置一个连接条是有利的。
如果在埋置电子处理装置的元件的多层拼接的印制电路板之间的空隙使用一种填料，乃是特别有利的，这种结构可提高电感式传感器和配置此传感器的旋转发送器的坚固性尤其是抗震强度。
本发明的诸多有利方案可从各项从属权利要求中得知。
本发明电感式传感器以及配置此传感器的旋转发送器的其他细节和优点可从结合附图所示的一些实施例的下列说明中得知。
附图表示：
图1在拼接前的两块印制电路板的透视图；
图2本发明电感式传感器的一个剖面图；
图3为清楚起见而剖开了外壳的旋转发送器的透视图。
图1表示在拼接前的一个传感器的一部分的透视图。该传感器由一块坚硬的、玻璃纤维加强的环氧树脂基的环形第一印制电路板1组成，该印制电路板具有接收器印制导线1.1和励磁印制导线1.2(见图2)。第一印制电路板1具有一个环形的凹槽1.5，该凹槽由该印制电路板铣削而成，所以有两个环形的连接条1.6和1.7作为凹槽1.5的边界。为了在接收器印制导线1.1(还有励磁线圈1.2)之间建立与第二印制电路板2的电连接和为了第一印制电路板1与第二印制电路板2的机械连接，在第一印制电路板1上设置了所谓的半圆套1.8，这些半圆套在组装传感器时与第二印制电路板2的焊点2.3焊接。为了稍后浇注拼接好的印制电路板1、2，在第一印制电路板1上设置有钻孔形式的浇灌孔1.9。
同样具有坚硬的玻璃纤维加强的环氧树脂作为基板的第二印制电路板2在其两个表面装有电子处理装置的电子元件2.1、2.2(见图2)。面向第一印制电路板1的第二印制电路板2的表面具有特别敏感的元件2.1，在所示例子中尤指用板载芯片工艺设置在印制电路板1上的未封装的专用集成电路(ASIC)。通过使用未封装的元件2.1可进一步节省空间，因为不需考虑封装占用的空间。
图2表示传感装置的横截面，其中两块印制电路板1、2已拼接成夹层状即相互平行对准。从图可以看出，凹槽1.5中装有特别敏感的元件2.1。第一印制板1几乎作为保护盖用来覆盖电子元件2.1。其中，不但在轴向内而且还在径向内实现了保护，因为连接条1.6、1.7在径向内也保护了元件2.1，所以有效地防止了元件2.1受外部的影响，例如防止了润滑剂或潮气的侵入以及机械的影响。用一种填料3灌注在第一印制电路板1和印制电路板2之间的容积即灌入由凹槽形成的空腔中，可进一步提高对外界影响的保护。为此，将液态的填料3通过注入孔1.9之一压注到凹槽1.5中，而挤出的空气则通过另一个注入孔1.9排出。灌注后，开始时呈液态的填料3硬化成为一种固体。另一个办法是，也可用一种例如硅基的胶填料3。通过注入填料3，提高了电感式传感器的抗震强度并由此提高了配置此传感器的旋转发送器的坚固性。
从图2还可看出，第二印制电路板2的两面供元件2.1、2.2的插装之用。亦即在给定元件2.1、2.2数目的情况下，与单面插装比较，印制电路板2可用较小的直径，这最终对旋转发送器的外形尺寸起决定性的作用。
在图2中，除了第一印制电路板1和第二印制电路板2外，还画出了另一块印制电路板4，在这块印制电路板上设置了一个分隔结构，这个分隔结构以规律设置的导电面4.1的形式设置在印制电路板4上。在传感器工作时，两块印制电路板1、2的多层复合结构对面的印制电路板4围绕旋转轴A旋转。
图3表示本发明电感式传感器配置的旋转发送器。该旋转发送器具有一个固定的外壳5和一根相对于该外壳旋转的轴6。带有分隔结构4.1的印制电路板4抗扭地固定在轴6上。而由两块印制电路板1、2组成的多层复合结构则固定在外壳5上。此外，该旋转发送器包括一个变速器7，该变速器是旋转发送器的多圈功能所需的。通过电感式传感器的紧凑的结构，可明显减小旋转发送器；此外，通过电子处理装置的元件2.1的密封覆盖，提供了一个极其可靠而又坚固的旋转发送器。

Claims (9)

1.由至少两块印制电路板(1，2)组成的电感式传感器，其中：
·在第一块印制电路板(1)上设置接收器印制导线(1.1)，
·在第二块印制电路板(2)上设置用来处理信号的电子处理装置的元件(2，1)，这些信号是由接收器印制导线(1.1)引起的，
而且这两块印制电路板(1，2)拼接成多层结构，电子处理装置的至少一个元件(2.1)布置在这两块印制电路板(1，2)之间。
2.按权利要求1的电感式传感器，第二块印制电路板(2)两面都装有电子处理装置的元件(2.1)。
3.按权利要求1的电感式传感器，第一块印制电路板(1)具有一个凹槽(1.5)，用以安装电子处理装置的至少一个元件(2.1)。
4.按权利要求1的电感式传感器，至少一块印制电路板(1，2)尤其在其外周边上具有一个至少部分环绕的连接条(1.6，1.7)，所以多层连拼的印制电路板(1，2)之间的缝隙至少部分地被覆盖。
5.按权利要求1的电感式传感器，两块印制电路板(1，2)通过钎焊相互进行电的和/或机械的连接。
6.按权利要求1的电感式传感器，两块印制电路板(1，2)通过粘接相互连接。
7.按权利要求1的电感式传感器，两块印制电路板(1，2)通过焊接相互连接。
8.按权利要求1的电感式传感器，两块印制电路板(1，2)之间的容积用一种填料(3)填充。
9.旋转发送器，具有一个按权利要求1所述的电感式传感器。
CNB2004100058761A 2003-02-21 2004-02-20 电感式传感器和配置此传感器的旋转发送器 Expired - Fee Related CN1311219C (zh)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108351223A (zh) * 2015-11-12 2018-07-31 黑拉有限责任两合公司 用于检测转动运动的装置
CN108351223B (zh) * 2015-11-12 2021-06-01 黑拉有限责任两合公司 用于检测转动运动的装置

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CN1311219C (zh) 2007-04-18
US20040164728A1 (en) 2004-08-26
JP4504038B2 (ja) 2010-07-14
US7157903B2 (en) 2007-01-02
JP2004251902A (ja) 2004-09-09
ATE404848T1 (de) 2008-08-15
EP1450135A1 (de) 2004-08-25
DE50310314D1 (de) 2008-09-25
EP1450135B1 (de) 2008-08-13

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