CN201430584Y - Anti-crash isolation device used in bus communication system - Google Patents
Anti-crash isolation device used in bus communication system Download PDFInfo
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- CN201430584Y CN201430584Y CN2009201096398U CN200920109639U CN201430584Y CN 201430584 Y CN201430584 Y CN 201430584Y CN 2009201096398 U CN2009201096398 U CN 2009201096398U CN 200920109639 U CN200920109639 U CN 200920109639U CN 201430584 Y CN201430584 Y CN 201430584Y
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- bus
- communication system
- concentrator
- collapse
- isolation device
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- 238000004891 communication Methods 0.000 title claims abstract description 41
- 238000002955 isolation Methods 0.000 title claims abstract 10
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000013024 troubleshooting Methods 0.000 abstract description 2
- 125000006850 spacer group Chemical group 0.000 description 21
- 238000010586 diagram Methods 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Abstract
本实用新型涉及电力系统通信技术领域，具体的说是涉及一种用于总线通信系统中的防崩溃隔离装置，该装置应用于电力通讯系统中，所述电力通讯系统包括一总线，其上耦接有一集中器和N个设备，在所述集中器和各设备中均装有一用于采集数据的接口芯片，集中器与各设备之间通过接口芯片进行通信，N为正整数，所述集中器和各设备之前均安装有一串联在总线上的防崩溃隔离装置，所述防崩溃隔离装置包括一电阻。该装置在工程维护和故障处理时，能够快速进行故障定位，提高了工程维护的效率，从整体上提高了RS－485总线通信系统的稳定性，具有方便实现、成本低廉、施工难度小、效益高的优点。
The utility model relates to the technical field of power system communication, in particular to an anti-collapse isolation device used in a bus communication system. The device is used in a power communication system. The power communication system includes a bus on which a A concentrator and N devices are connected, and an interface chip for collecting data is installed in the concentrator and each device, and the concentrator and each device communicate through the interface chip, N is a positive integer, and the concentrator An anti-collapse isolating device connected in series on the bus is installed before the device and each device, and the anti-collapse isolating device includes a resistor. The device can quickly locate faults during engineering maintenance and troubleshooting, improves the efficiency of engineering maintenance, and improves the stability of the RS-485 bus communication system as a whole. high merit.
Description
Technical field
The utility model relates to the communication of power system technical field, relates to specifically a kind ofly be applied to prevent cause crash-free spacer assembly in the power communication system of whole power system collapse because of various local faults.
Background technology
RS-485 bus communication technology, adopt balance to send and differential received, have the ability that suppresses common mode disturbances, and simple in structure, cheap, easy to use, communication distance and message transmission rate suitably reach reliability and are widely used in fields such as electric power data acquisition than characteristics such as height.The half-duplex network that the RS-485 interface is formed, general needs two lines, so the RS-485 interface all adopts the Shielded Twisted Pair transmission, its network topology structure generally adopts the bus type structure of terminal coupling, do not support annular or star network, preferably adopt a bus that each node is connected in series.Length of lead-out wire from bus to each node should be lacked as far as possible, so that make the reflected signal in the lead-out wire minimum to the influence of bus signals.Adopt RS-485 can realize a bit also can realize the multiple spot two-way communication, but synchronization can only having a transmitter to communication of multiple spot, remaining is a receiver, promptly one main more than from communication mode.The fundamental diagram that accompanying drawing 1 is used in the power communication system for the RS-485 bus, because RS-485 adopts the differential signal negative logic, + 0.2V～+ 6V represents " 0 ",-6V～-0.2V represent " 1 " (be differential input end+6V 〉=VA-VB 〉=+200mV, output logic 1,-6V≤VA-VB≤-200mV, output logic 0; ).Concentrator in system or some collectors need send data, just in A, B line, enable to produce the electric current of a certain direction, concentrator and all the other are in the A of the collector MAX485 chip interface of accepting state, the voltage difference that the B pin will produce plus or minus, thereby produce the signal that is used to the information of transmitting.
Operation principle according to the RS-485 bus, in system between somewhere A line, B line short trouble has taken place, certain communication unit is that the MAX485 chip is short-circuited, and because of can not producing voltage difference, then whole RS-485 bus communication system is with the generation systems short circuit and the collapse of paralysing between A, B line.Accompanying drawing 2 is the rough schematic of the system that breaks down, the schematic diagram of accompanying drawing 2-1 for being short-circuited at RS-485 bus somewhere C point, certain communication unit of accompanying drawing 2-2 is the schematic diagram that the MAX485 chip is short-circuited, shown in Fig. 2-1 and Fig. 2-2, the A of each concentrator or gatherer, B pin because short circuit causes electric current no longer to pass through each MAX485 chip, and select the path of short circuit, so can not produce voltage difference again, according to the operation principle of RS-485 bus, whole system all can not communicate and collapse.
The utility model content
For overcoming the defective of prior art, the purpose of this utility model is to provide a kind of bus communication that can prevent somewhere in the bus or certain chip short circuit and cause whole bus communication system paralysis with putting the collapse spacer assembly.
Above-mentioned purpose for this reason, the utility model is by the following technical solutions: a kind of crash-free spacer assembly that is used for bus communication system, be used for the power communication system, described power communication system comprises a bus, be coupled with an a concentrator and N equipment on it, the interface chip of image data all is housed-is used in described concentrator and each equipment, communicate by interface chip between concentrator and each equipment, N is a positive integer, it is characterized in that: before described concentrator and each equipment a crash-free spacer assembly that is connected on the bus is installed all, described crash-free spacer assembly comprises a resistance.
Wherein, crash-free spacer assembly comprises an anti-lightning strike structure, and described bus adopts the RS485 bus of two-wire system: i.e. A line and B line structure, and after described resistance is installed in the A line, an anti-lightning strike structure in parallel again between A line and B line.
Wherein, described anti-lightning strike structure adopts resettable fuse.
Wherein, described resistance and anti-lightning strike construction packages are in a shell.
Wherein, described interface chip adopts the MAX485 chip.
The beneficial effects of the utility model are: 1) the collapse spacer assembly of putting of the present utility model is when engineering maintenance and troubleshooting, can carry out fault location fast, improve the efficient of engineering maintenance, improved the stability of RS-485 bus communication system on the whole; 2) crash-free spacer assembly of the present utility model adopts modularized design, and volume is little, can realize and the original system seamless connection; 3) the utility model is convenient realizes that with low cost, difficulty of construction is little, high efficiency.
Description of drawings
The fundamental diagram that Fig. 1 uses in the power communication system for RS-485 bus in the prior art;
Fig. 2 is the rough schematic of the system that breaks down in the prior art, and wherein Fig. 2-1 is the schematic diagram that is short-circuited at RS-485 bus somewhere C point, the schematic diagram that Fig. 2-2 is short-circuited for certain node;
Fig. 3 is installed in structural representation in the bus communication system for the utility model;
Fig. 4 is an operation principle schematic diagram of the present utility model, and wherein Fig. 5-1 is the be short-circuited schematic diagram of fault of bus, the schematic diagram when Fig. 5-2 is short-circuited fault for certain equipment;
Fig. 5 is the structural representation of crash-free spacer assembly;
Wherein: 1-bus, 2-concentrator, 3-equipment, 4-interface chip, the crash-free spacer assembly of 5-, 6-resistance, the anti-lightning strike structure of 7-, 8-shell.
Embodiment
Below in conjunction with accompanying drawing the collapse spacer assembly of putting of the present utility model is described in further detail.
As shown in Figure 3, be coupled with a concentrator 2 and N equipment 3 on the described RS-485 bus 1, described N is a positive integer, one interface chip 4 (adopting the MAX485 chip) all is housed in concentrator 2 and each equipment 3, carry out the signal transmission by interface chip 4 between concentrator 2 and each equipment 3, be equipped with a crash-free spacer assembly 5 before described concentrator 2 and each equipment 3.As shown in Figure 5, described crash-free spacer assembly 5 comprise one with resistance 6 and anti-lightning strike structure 7 (adopting model is the resettable fuse of JK250-120U), RS-485 bus of the present utility model adopts the two-wire system structure: promptly comprise A line and B line, the A line that is in series with resistance 6 again with the B line between a resettable fuse 7 in parallel, described RS-485 bus adopts Shielded Twisted Pair, and its screen constitutes the gauze screen (as shown in phantom in Figure 5) of a ground connection in the outside of crash-free spacer assembly.In order to reduce the interference of the crash-free spacer assembly of outer bound pair, can be with resistance 6 and resettable fuse 7 outer packages one shielding box 8 that is connected on the RS-485 bus.
Introduce the operation principle of the crash-free spacer assembly of the utility model below in detail: each crash-free spacer assembly produces an equivalent resistance R under the situation that guarantees RS-485 bus and each device security operate as normal
d
During operate as normal, concentrator is realized communicating by letter by the MAX485 chip with each equipment room, shown in Fig. 4-1, when the somewhere of RS-485 bus (being the point of C shown in Fig. 4-1) when being short-circuited fault, the later equipment of short dot just can not operate as normal, the equipment of promptly drawing " * " among the figure all can't proper communication, equipment before the short dot is because the existence of crash-free spacer assembly 5, install the resistance between 485 buses, two lines before interior built-in resistor has promoted short dot, so the equipment before the short dot can operate as normal.
During operate as normal, concentrator is realized communicating by letter by the MAX485 chip with each equipment room, shown in Fig. 4-2, when certain equipment is short-circuited fault, the all devices that equipment from this front, fault point begins backward just can not carry out proper communication (promptly when fault point C occurs, the equipment of drawing " * " all can't proper communication), this moment, effectiveness just took place in the crash-free spacer assembly 5 of fault point front end, promptly form a relative less RS-485 bus communication system with this crash-free spacer assembly each equipment before, the new less relatively RS-485 bus communication system of forming still can be stablized normal work, has prevented that effectively whole system all is subjected to the influence of short trouble.
When finding fault, can solve short trouble according to the position of the device address failure judgement generation that can not carry out proper communication.Still have the equipment component cisco unity malfunction as finding, then prove to exist the many places fault in the RS-485 bus communication system.Can solve successively as stated above.
The effect of this device is to prevent that the whole system that causes because of part or somewhere short trouble is collapsed in the RS-485 bus communication system on the one hand.So long as the problem that short trouble causes is easy to investigate location and maintenance according to its operation principle, improved the efficient of engineering maintenance on the other hand.
Should be noted that at last: above embodiment only is not intended to limit in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to the foregoing description, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement embodiment of the present utility model, and do not break away from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201096398U CN201430584Y (en) | 2009-07-06 | 2009-07-06 | Anti-crash isolation device used in bus communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201096398U CN201430584Y (en) | 2009-07-06 | 2009-07-06 | Anti-crash isolation device used in bus communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201430584Y true CN201430584Y (en) | 2010-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201096398U Expired - Lifetime CN201430584Y (en) | 2009-07-06 | 2009-07-06 | Anti-crash isolation device used in bus communication system |
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| CN (1) | CN201430584Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101883037A (en) * | 2010-07-06 | 2010-11-10 | 哈尔滨理工大学 | A RS485 bus short-circuit isolator |
| CN103326911A (en) * | 2013-07-03 | 2013-09-25 | 富盛科技股份有限公司 | Self healing ring RS485 bus structure with short circuit and circuit break prevention |
| CN107884666A (en) * | 2017-12-14 | 2018-04-06 | 威胜信息技术股份有限公司 | MBUS bus short circuits detect circuit and its detection method |
-
2009
- 2009-07-06 CN CN2009201096398U patent/CN201430584Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101883037A (en) * | 2010-07-06 | 2010-11-10 | 哈尔滨理工大学 | A RS485 bus short-circuit isolator |
| CN103326911A (en) * | 2013-07-03 | 2013-09-25 | 富盛科技股份有限公司 | Self healing ring RS485 bus structure with short circuit and circuit break prevention |
| CN103326911B (en) * | 2013-07-03 | 2016-06-08 | 富盛科技股份有限公司 | A kind of against short-circuit, open circuit spontaneous recovery annular RS485 bus structures |
| CN107884666A (en) * | 2017-12-14 | 2018-04-06 | 威胜信息技术股份有限公司 | MBUS bus short circuits detect circuit and its detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140307 Owner name: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140307 |
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| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100192 HAIDIAN, BEIJING TO: 100031 XICHENG, BEIJING |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140307 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: China Electric Power Research Institute Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 China Electric Power Research Institute of the Ministry of science and technology Patentee before: China Electric Power Research Institute |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100324 |