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CN100559782C - 双线线路的线路终端装置 - Google Patents

双线线路的线路终端装置 Download PDF

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CN100559782C
CN100559782C CNB200380108079XA CN200380108079A CN100559782C CN 100559782 C CN100559782 C CN 100559782C CN B200380108079X A CNB200380108079X A CN B200380108079XA CN 200380108079 A CN200380108079 A CN 200380108079A CN 100559782 C CN100559782 C CN 100559782C
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resistors
line
terminating
line termination
input signal
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CN1732655A (zh
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W·法尔巴赫
U·魏赫尔斯米勒
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Robert Bosch GmbH
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40006—Architecture of a communication node
    • H04L12/40032—Details regarding a bus interface enhancer
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure
    • G06F13/4063—Device-to-bus coupling
    • G06F13/4068—Electrical coupling
    • G06F13/4086—Bus impedance matching, e.g. termination
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/50—Systems for transmission between fixed stations via two-conductor transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0264—Arrangements for coupling to transmission lines
    • H04L25/0298—Arrangement for terminating transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40208—Bus networks characterized by the use of a particular bus standard
    • H04L2012/40215—Controller Area Network CAN
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40267—Bus for use in transportation systems
    • H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Dc Digital Transmission (AREA)
  • Small-Scale Networks (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

双线线路的线路终端装置，其具有位于所述的双线之间的至少一个第一和第二终端电阻，其中该第一和第二终端电阻相互串联，而且在所述的两个终端电阻之间设有至少一个开关装置。

Description

双线线路的线路终端装置
现有技术
本发明涉及双线线路的线路终端装置，其具有位于所述的双线之间的第一和第二终端电阻，其中该第一和第二终端电阻相互串联。
这种装置在DE 195 25 350 A1中被描述过。在该文献中建议在所述双线线路的双线之间设立至少一个第一和第二终端电阻，并将该两个电阻串联。从两个电阻之间的连接线引出一根导线接向固定电位、尤其是接向地电位。在此，终端电阻如今尤其在CAN总线系统中是被固定地设置的，也即被装配或未被装配在控制设备中。因此人们在使用时并不灵活。
因此本发明的任务在于提供一种在应用于双线线路的线路终端中时实现更高灵活性的装置。
发明优点
上述任务通过以下的双线线路的线路终端装置来解决，其具有位于所述的双线之间的至少一个第一和第二终端电阻，其中该第一和第二终端电阻相互串联，并且优选地在所述的两个终端电阻之间设有至少一个开关装置。
由此提高了使用时的灵活性，因为利用如此配置的终端电阻能够在应用中实现快速切换或快速匹配。
优选地，该装置结合CAN总线系统使用，并在此负责接收和/或发送功能，使得所述的双线线路为CAN总线系统的一部分，也即CAN高位线路和CAN低位线路。
有益地，另外还设立一开关逻辑装置，其根据输入信号控制所述的至少一个开关装置。
另外有利的是，在一种特殊的改进方案中由一种计算模块、尤其由微控制器本身来产生所述的输入信号。
通过使用可配置的、尤其是CAN终端电阻，能够通过所述开关逻辑装置的软件的(通过μc的数字输出)或硬件的(也即通过电缆束插接器中的硬件桥)控制来将终端电阻与相应的应用相匹配。由此把尤其在客户和供应商处的控制设备的多样性降低到最小程度，例如单一的控制设备被用于孤立设备、主设备和从属设备，而不是为每种应用情况提供一种控制设备。由此逻辑装置和存放的费用变少，尤其是客户和供应商的费用变少。
优选地在所述的终端电阻之间连接一个对称元件，其在一种有利的实施方式中能够分别通过一个开关元件将每个终端电阻与该对称元件相连接。
从而，尤其通过软件配置，能够将尤其被用来控制车辆运行过程的控制设备与任何应用进行匹配。
附图
接下来借助于单个附图所示的图形来详细讲述本发明。该附图示出了本发明的装置。
实施例说明
单个的附图1示出了一个CAN高位线路CAB-H和一个CAN低位线路CAN-L，它们通过耦合元件111和112与一个尤其被用作为CAN收发信机的模块100相连接。如刚才所述，模块100在此负责接收和/或发送功能，亦即尤其CAN模块的与此有关的收发信功能。CAN高位线路和CAN低位线路被输送到一个驱动模块，尤其是CAN驱动模块103。另外还示出了两个终端电阻107和108，它们相互串联，并且能与开关装置105和106相互连接，以及与对称单元、也即对称元件109相连接。开关元件105和106由控制逻辑装置104触发，这是通过虚线箭头象征性地表示的。控制逻辑装置本身通过线路114、另一耦合元件110而譬如从计算模块或微控制器101的输出、例如它的输出113获得一个输入信号。另外，微控制器与驱动模块相连，以便通过通信连接102单向和/或双向地通信。
利用开关逻辑104上的输入信号，能够选择是激活终端电阻还是将其与总线分离开来。在此，输入信号一方面是数字的，也即是由微控制器输出113或通过电缆束插接器内的桥产生或提取的。与总线的分离是通过两个电开关、在此是开关装置105和106来实现的。于是，终端电阻的配置可以通过μc输出而随时被改变，在电缆束插接器内的桥的情况下则只有在其改建之后。
通过采用可配置的CAN终端电阻，能够通过开关逻辑装置的硬件的或软件的控制来将终端电阻与相应的应用相匹配。在软件匹配的情况下，微控制器101的数字输出被用于此目的。在硬件匹配的情况下，必须通过电缆束插接器内的桥来实现。由此在用于控制运行过程的控制设备中，尤其在车辆上，把客户和供应商处的控制设备多样性降低到最小程度。从而，仅仅通过改变软件配置就能将控制设备的CAN终端电阻与任意的应用相匹配。这开创了快速应用匹配的简单而灵活的可能性。

Claims (5)

1.双线线路的线路终端装置，其具有位于所述的双线之间的至少一个第一和第二终端电阻，其中该第一和第二终端电阻相互串联，其特征在于：在所述的两个终端电阻之间设有至少一个开关装置，并且设有一个开关逻辑装置，其根据输入信号控制所述的至少一个开关装置。
2.如权利要求1所述的装置，其特征在于：在所述的终端电阻之间连接对称元件。
3.如权利要求2所述的装置，其特征在于：每个终端电阻可通过一个开关装置与所述的对称元件相连接。
4.如权利要求1所述的装置，其特征在于：所述的输入信号由一计算模块产生。
5.如权利要求1所述的装置，其特征在于：所述的双线线路是CAN总线系统的一部分，所述的装置监视CAN总线系统内的接收和/或发送功能。
CNB200380108079XA 2002-12-30 2003-12-16 双线线路的线路终端装置 Expired - Lifetime CN100559782C (zh)

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DE10261386A DE10261386A1 (de) 2002-12-30 2002-12-30 Vorrichtung für einen Leitungsabschluss von Zweidraht-Leitungen
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EP (1) EP1582040B1 (zh)
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US7541830B2 (en) 2009-06-02
KR20050098846A (ko) 2005-10-12
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CN1732655A (zh) 2006-02-08
JP2006512842A (ja) 2006-04-13
EP1582040B1 (de) 2013-02-20
JP4268139B2 (ja) 2009-05-27
EP1582040A1 (de) 2005-10-05
KR101076154B1 (ko) 2011-10-21
WO2004062219A1 (de) 2004-07-22
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US20060132170A1 (en) 2006-06-22
AU2003294657A1 (en) 2004-07-29

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