CN103248529B - The control circuit of communication network build-out resistor - Google Patents
The control circuit of communication network build-out resistor Download PDFInfo
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- CN103248529B CN103248529B CN201210030523.1A CN201210030523A CN103248529B CN 103248529 B CN103248529 B CN 103248529B CN 201210030523 A CN201210030523 A CN 201210030523A CN 103248529 B CN103248529 B CN 103248529B
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Abstract
The invention discloses the control circuit of a kind of communication network build-out resistor.Whether this control circuit includes: detector unit, be main control computer for detecting the node of communication network；And control unit, it is connected with detector unit, is used for when the node of communication network is main control computer, the build-out resistor incoming communication network of communication control network.Pass through the present invention so that communication network build-out resistor automatically accesses, it is not necessary to artificial plug-in mounting.
Description
Technical field
The present invention relates to circuit field, in particular to the control circuit of a kind of communication network build-out resistor.
Background technology
At present, in communication network build-out resistor installation site need by debugging or after sale personnel according to install communication network
Network node confirms, and, build-out resistor is one appliance component of interim making, needs debugging or personnel's keeping after sale.?
In this communication network, if network occurs abnormal, debugging or time personnel need to check build-out resistor after sale, it is often difficult to look for
Arrive, and corresponding build-out resistor be also easily lost, the most how can recognition node automatically, automatically access build-out resistor and carried
Upper schedule.
The problem that cannot automatically access for communication network build-out resistor in correlation technique, the most not yet proposes effective solution
Certainly scheme.
Summary of the invention
Present invention is primarily targeted at the control circuit that a kind of communication network build-out resistor is provided, to solve communication network
The problem that build-out resistor cannot automatically access.
To achieve these goals, the invention provides the control circuit of a kind of communication network build-out resistor.
The control circuit of the communication network build-out resistor according to the present invention includes: detector unit, is used for detecting communication network
Node whether be main control computer；And control unit, it is connected with detector unit, is main control computer for the node at communication network
Time, the build-out resistor incoming communication network of communication control network.
Further, communication network is CAN network.
Further, detector unit includes: the toggle switch of CAN network main control computer, and wherein, the node of CAN network is main
During control machine, the first end of toggle switch has the first level, when the node of CAN network is not main control computer, and the first of toggle switch
End has second electrical level, and wherein, the first level is different level from second electrical level.
Further, detector unit also includes: the first switching tube, and the first end is connected with the first end of toggle switch, uses
In the first end at toggle switch, there is the first electricity conducts；And the of second switch pipe, the first end and the first switching tube
Two ends are connected, for the conducting when the first switching tube conducting.
Further, detector unit also includes: the first resistance, and the first end is connected with the first end of toggle switch, second
End is connected with the first end of the first switching tube；Second resistance, the first end is connected to primary nodal point, the second end ground connection, wherein, the
One node is the node between the second end of the first switching tube and the first end of second switch pipe；And the 3rd resistance, the first end
Being connected to primary nodal point, the second end is connected with the first end of second switch pipe.
Further, the first level is low level, and second electrical level is high level.
Further, control unit includes: switch module, is connected with the second end of second switch pipe, for second
Close during switching tube conducting, so that the build-out resistor incoming communication network of communication network.
Further, switch module is relay, wherein, and the first end of relay coil and the second end of second switch pipe
It is connected, the second termination power of coil, relay switch adhesive when second switch pipe turns on, so that the coupling of communication network
Resistance incoming communication network.
Further, control unit also includes: diode, and the first end is connected to secondary nodal point, and the second end is connected to the 3rd
Node, wherein, secondary nodal point is the node between the second end of second switch pipe and the first end of relay coil, the 3rd node
Node between relay coil the second end and power supply.
By the present invention, use the control circuit including the communication network build-out resistor with lower part: detector unit, be used for
Whether the node of detection communication network is main control computer；And control unit, it is connected with detector unit, at communication network
When node is main control computer, the build-out resistor incoming communication network of communication control network, solving communication network build-out resistor cannot
The problem automatically accessed, and then reached communication network build-out resistor and automatically access, it is not necessary to the effect of artificial plug-in mounting.
Accompanying drawing explanation
The accompanying drawing of the part constituting the application is used for providing a further understanding of the present invention, and the present invention's is schematic real
Execute example and illustrate for explaining the present invention, being not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the theory diagram of the control circuit of communication network build-out resistor according to embodiments of the present invention；And
Fig. 2 is the wiring diagram of the control circuit of communication network build-out resistor according to embodiments of the present invention.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can phases
Combination mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Fig. 1 is the theory diagram of the control circuit of communication network build-out resistor according to embodiments of the present invention, such as Fig. 1 institute
Showing, this control circuit includes detector unit 20 and control unit 40.
Wherein, whether detector unit 20 is main control computer for detecting the node of communication network, and control unit 40 is single with detection
Unit is connected, and is used for when the node of communication network is main control computer, the build-out resistor incoming communication network of communication control network.
By the control circuit of this embodiment, it is possible to the build-out resistor needed for communication network is automatically accessed, in order to adjust
Examination or personnel after sale debug maintenance work.Increase the control circuit of the build-out resistor that this embodiment provides at node, work as detection
Unit 20 identifies when this node is main control computer, and the control unit 40 of control circuit comes into force, thus is not affecting whole communication quality
In the case of, automatically access build-out resistor.
Communication between CAN network is normal, reliability service is also required on node increase build-out resistor, it is preferable that detection
Unit 20 includes: the toggle switch of CAN network main control computer, wherein, when toggle switch is placed in primary importance, and the node of CAN network
For main control computer, the first end of toggle switch has the first level, and when toggle switch is placed in other positions, the node of CAN network is not
For main control computer, the first end of toggle switch has second electrical level, and wherein, the first level is different level from second electrical level.Logical
Cross toggle switch to identify the main control computer of CAN network, it is contemplated that actually used place and installation and debugging, when communication network is CAN
During network, build-out resistor uses the mode with toggle switch linkage to automatically access.
Fig. 2 is the wiring diagram of the control circuit of communication network build-out resistor according to embodiments of the present invention, as in figure 2 it is shown,
SWITCH in figure is toggle switch SA8, and the ON end of toggle switch SA8 connects power supply via resistance R163, at toggle switch SA8
ON end and resistance R163 between node is set, this node draw toggle switch SA8 the first end SA8_1.Wherein, open when dial-up
When the driving lever of pass SA8 is placed in ON end (when being placed in primary importance), the node of CAN network is main control computer, toggle switch the first end
SA8_1 has low level.Therefore, when toggle switch the first end SA8_1 has low level, illustrate that the node of CAN network is main
Control machine.
When communication network is CAN network, specifically, the wiring diagram of the control circuit of communication network build-out resistor describes such as
Under: detector unit 20 includes: the first resistance R162, the first audion Q11, the second resistance R141, the 3rd resistance R5 and second
Audion Q12, control unit 40 includes: relay K 16 and diode D38.Wherein,
First end of the first resistance R162 is connected with toggle switch the first end SA8_1, the second end and the first audion Q11
The first end be connected；
First end of the first audion Q11 and second end of the first resistance R162 are connected, the second of the first audion Q11
End is connected via first end of the 3rd resistance R5 and the second audion Q12, the 3rd termination power of the first audion Q11；
First end of the second resistance R141 is connected to primary nodal point, the second end ground connection, and wherein, primary nodal point is the one or three pole
Node between second end and the 3rd resistance R5 of pipe Q11；
First end of the second audion Q12 and second end of the first audion Q11 are connected, the of the second audion Q12
Two ends are connected with the first end of relay K 16 coil, the 3rd end ground connection of the second audion Q12；
First end of relay K 16 coil and second end of the second audion Q12 are connected, the second termination electricity of coil
Source, the first end of relay K 16 switch is connected with the first end CAN_H of CAN network node via build-out resistor R107, relay
Second end of device K16 switch is connected with the second end CAN_L of CAN network node；
First end of diode D38 is connected to secondary nodal point, and the second end is connected to the 3rd node, and wherein, secondary nodal point is
Node between second end and first end of relay K 16 coil of the second audion Q12, the 3rd node relay K 16 coil
Node between second end and power supply.
The principle of this circuit is described below: control circuit is identified by the low and high level of toggle switch the first end SA8_1
Whether it is main control computer, linkage relay K16 whether adhesive simultaneously.When the driving lever of toggle switch SA8 is placed in ON end, toggle switch
First end SA8_1 is low level, the first audion Q11 conducting, the second audion Q12 conducting, relay K 16 adhesive, accordingly
Build-out resistor R107 is from being automatically connected between CAN_H and CAN_L；When the driving lever of toggle switch SA8 be placed in digital end (or other
End) time, toggle switch the first end SA8_1 end is high level, the first audion Q11 cut-off, the second audion Q12 cut-off, relay
Device K16 disconnects, separated from CAN-H and CAN-L of build-out resistor R107.
Use the CAN network of this control circuit, build-out resistor is directly installed on control circuit plate, it is not necessary to additionally fill
Joining, debugging simultaneously or the build-out resistor during personnel need not Network Search after sale are at which node device, after units' installation, need
To carrying out dial-up setting on the master control borad of unit, it is configured for main control computer toggle switch SA8, when toggle switch SA8 is arranged
During for main control computer, build-out resistor comes into force, and during non-main control computer, build-out resistor is invalid, it is achieved that build-out resistor automatically accesses, it is not necessary to people
For removing plug-in mounting.
As can be seen from the above description, present invention achieves following technique effect: by communication network build-out resistor
Control circuit so that communication network build-out resistor automatically accesses, it is not necessary to the effect of artificial plug-in mounting.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (6)
1. the control circuit of a communication network build-out resistor, it is characterised in that including:
Whether detector unit, be main control computer for detecting the node of communication network；And
Control unit, is connected with described detector unit, for when the node of described communication network is main control computer, controls described
The build-out resistor of communication network accesses described communication network, and described communication network is CAN network；
Described detector unit includes: the toggle switch of described CAN network main control computer,
Wherein, when the node of described CAN network is main control computer, the first end of described toggle switch has the first level, described CAN
When the node of network is not main control computer, the first end of described toggle switch has second electrical level, wherein, and described first level and institute
Stating second electrical level is different level,
Described detector unit also includes:
First switching tube (Q11), the first end is connected with first end (SA8_1) of described toggle switch, at described dial-up
First end (SA8_1) of switch has described first electricity conducts；And
Second switch pipe (Q12), the second end of the first end and the first switching tube (Q11) is connected, for switching described first
Conducting during pipe (Q11) conducting.
The control circuit of communication network build-out resistor the most according to claim 1, it is characterised in that described detector unit is also
Including:
First resistance (R162), the first end is connected with first end (SA8_1) of described toggle switch, the second end and described first
First end of switching tube (Q11) is connected；
Second resistance (R141), the first end is connected to primary nodal point, the second end ground connection, and wherein, described primary nodal point is described
Node between second end and first end of described second switch pipe (Q12) of one switching tube (Q11)；And
3rd resistance (R5), the first end is connected to the first end of described primary nodal point, the second end and described second switch pipe (Q12)
It is connected.
The control circuit of communication network build-out resistor the most according to claim 2, it is characterised in that described first level is
Low level, described second electrical level is high level.
The control circuit of communication network build-out resistor the most according to claim 1 and 2, it is characterised in that described control list
Unit includes:
Switch module, is connected with the second end of described second switch pipe (Q12), for leading described second switch pipe (Q12)
Close time logical, so that the build-out resistor of described communication network accesses described communication network.
The control circuit of communication network build-out resistor the most according to claim 4, it is characterised in that
Described switch module is relay (K16),
Wherein, the first end of described relay (K16) coil is connected with the second end of described second switch pipe (Q12), described
Second termination power of coil, described relay (K16) switch adhesive when described second switch pipe (Q12) turns on, so that institute
The build-out resistor (R107) stating communication network accesses described communication network.
The control circuit of communication network build-out resistor the most according to claim 5, it is characterised in that described control unit is also
Including:
Diode (D38), the first end is connected to secondary nodal point, and the second end is connected to the 3rd node, and wherein, described secondary nodal point is
Node between second end and first end of described relay (K16) coil of described second switch pipe (Q12), described Section three
Point is the node between described relay (K16) coil the second end and power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210030523.1A CN103248529B (en) | 2012-02-10 | 2012-02-10 | The control circuit of communication network build-out resistor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210030523.1A CN103248529B (en) | 2012-02-10 | 2012-02-10 | The control circuit of communication network build-out resistor |
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| CN103248529A CN103248529A (en) | 2013-08-14 |
| CN103248529B true CN103248529B (en) | 2016-12-14 |
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| CN201210030523.1A Active CN103248529B (en) | 2012-02-10 | 2012-02-10 | The control circuit of communication network build-out resistor |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713548A (en) * | 2013-12-20 | 2014-04-09 | 中国北方车辆研究所 | Gate control device for bus matched resistor |
| CN104129690B (en) * | 2014-06-19 | 2016-04-13 | 深圳市海浦蒙特科技有限公司 | Elevator communication matched resistance connection control method and system |
| CN107356802B (en) * | 2017-07-03 | 2020-02-28 | 珠海格力电器股份有限公司 | Self-test circuit and circuit self-test method |
| CN108900402A (en) * | 2018-07-23 | 2018-11-27 | 珠海格力电器股份有限公司 | A kind of build-out resistor termination control method, apparatus and system |
| CN113176743B (en) * | 2021-03-25 | 2022-11-15 | 四川百纳科技有限责任公司 | CAN network physical layer diagnosis resistance self-adaptive circuit and method |
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| CN1138780A (en) * | 1995-06-20 | 1996-12-25 | 友讯科技股份有限公司 | Auto-checking and setting device and method for tinkertoy network system terminal resistance |
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| CN101873108A (en) * | 2009-04-21 | 2010-10-27 | 上海线友电子有限公司 | Terminal resistor automatic match circuit in gas detector |
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| US8289127B2 (en) * | 2007-02-27 | 2012-10-16 | Analog Devices, Inc. | Switching systems |
| US8125291B2 (en) * | 2009-08-26 | 2012-02-28 | Virginia Tech Intellectual Properties, Inc. | Electromagnetic interference noise separator |
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| CN1138780A (en) * | 1995-06-20 | 1996-12-25 | 友讯科技股份有限公司 | Auto-checking and setting device and method for tinkertoy network system terminal resistance |
| CN1670717A (en) * | 2004-03-18 | 2005-09-21 | 联想(北京)有限公司 | Apparatus and method for allocating hardware address in embedded system |
| CN101873108A (en) * | 2009-04-21 | 2010-10-27 | 上海线友电子有限公司 | Terminal resistor automatic match circuit in gas detector |
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