CN114339485B - Circuit suitable for multi-machine optical fiber communication - Google Patents
Circuit suitable for multi-machine optical fiber communication Download PDFInfo
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- CN114339485B CN114339485B CN202111454475.4A CN202111454475A CN114339485B CN 114339485 B CN114339485 B CN 114339485B CN 202111454475 A CN202111454475 A CN 202111454475A CN 114339485 B CN114339485 B CN 114339485B
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Abstract
The invention discloses a circuit suitable for multi-machine optical fiber communication, each machine comprises an optical fiber communication circuit, the optical fiber communication circuit comprises sequentially numbered relays KM1 to KM4, an optical fiber terminal HT1, an optical fiber terminal HT2, an optical fiber receiving port HR1 and an optical fiber receiving port HR2, the relays KM1 to KM4 comprise upper end contacts and lower end contacts, one end of the upper end contact and one end of the lower end contact of the relay KM1 are connected with the optical fiber terminal HT1, and one end of the upper end contact and one end of the lower end contact of the relay KM2 are connected with a signal receiving end Rxd; when the contacts at the lower ends of the relays KM1 and KM4 are all closed, the current machine is a host; when the upper end contacts of the relays KM1 to KM4 are all closed, the current machine is a slave machine; the invention has the advantages that: the host computer and the slave computer are freely switched, and the use is convenient.
Description
Technical Field
The invention relates to the field of test power supplies, in particular to a circuit suitable for multi-machine optical fiber communication.
Background
In the high-power supply, the multi-machine communication adopts an optical fiber communication mode, and the optical fiber communication has a good anti-interference function, but the optical fiber communication cannot be bus connection like Can communication such as Can to realize multi-machine communication. In the prior art, optical fiber communication can only be used for single-point transmission and single-point reception, an optical fiber communication mode is used for transmitting information to a host computer and transmitting the information by N branches, and a slave computer respectively and single-point receives the information, for example, chinese patent publication No. CN109787361A, discloses a distributed control system and a method suitable for a micro-grid in a park.
In summary, the master and the slave of the conventional optical fiber communication circuit cannot be freely switched, and are inconvenient to use.
Disclosure of Invention
The invention aims to solve the technical problems that a traditional optical fiber communication circuit host and a traditional optical fiber communication circuit slave cannot be freely switched, and the use is inconvenient.
The invention solves the technical problems by the following technical means: each machine comprises an optical fiber communication circuit, the optical fiber communication circuit comprises sequentially numbered relays KM1 to KM4, an optical fiber terminal HT1, an optical fiber terminal HT2, an optical fiber receiving port HR1 and an optical fiber receiving port HR2, the relays KM1 to KM4 comprise upper end contacts and lower end contacts, one ends of the upper end contacts and the lower end contacts of the relays KM1 are connected with the optical fiber terminal HT1, one ends of the upper end contacts and the lower end contacts of the relays KM2 are connected with a signal receiving end Rxd, one ends of the upper end contacts and the lower end contacts of the relays KM3 are connected with a signal sending end Txd, and one ends of the upper end contacts and the lower end contacts of the relays KM4 are connected with the optical fiber receiving port HR 1; the other end of the lower end contact of the relay KM1 is suspended, and the other end of the upper end contact of the relay KM1, the optical fiber receiving port HR2, the other end of the lower end contact of the relay KM2 and the other end of the upper end contact of the relay KM3 are connected; the other end of the lower end contact of the relay KM4 is suspended, and the other end of the upper end contact of the relay KM4, the optical fiber terminal HT2, the other end of the upper end contact of the relay KM2 and the other end of the lower end contact of the relay KM3 are connected; when the contacts at the lower ends of the relays KM1 and KM4 are all closed, the current machine is a host; when the upper end contacts of the relays KM1 to KM4 are all closed, the current machine is a slave machine.
When the contacts at the lower ends of the relays KM1 to KM4 are all closed, the current machine is a host; when contacts at the upper ends of the relays KM1 and KM4 are all closed, the current machine is a slave machine, and the free switching between the master machine and the slave machine is realized by controlling the contacts of the relays, so that the use is convenient.
Further, the plurality of machines are sequentially numbered from the first machine to the nth machine, the optical fiber terminal HT2 of the first machine is connected to the optical fiber receiving port HR2 of the second machine, the optical fiber terminal HT2 of the second machine is connected to the optical fiber receiving port HR2 of the third machine, and the optical fiber terminals HT2 of the nth machine are sequentially connected in this rule, and the optical fiber terminal HT2 of the nth machine is connected to the optical fiber receiving port HR2 of the first machine; the optical fiber terminal HT1 of the N-th machine is connected with the optical fiber receiving port HR1 of the N-1 th machine, the optical fiber terminal HT1 of the N-1 th machine is connected with the optical fiber receiving port HR1 of the N-2 th machine, the optical fiber terminals HT1 of the second machine are connected with the optical fiber receiving port HR1 of the first machine in sequence according to the rule, and the optical fiber terminal HT1 of the first machine is connected with the optical fiber receiving port HR1 of the N-th machine to form annular connection.
Further, the machines have 3 machines, the serial numbers are the first machine to the third machine, the optical fiber terminal HT2 of the first machine is connected with the optical fiber receiving port HR2 of the second machine, the optical fiber terminal HT2 of the second machine is connected with the optical fiber receiving port HR2 of the third machine, and the optical fiber terminal HT2 of the third machine is connected with the optical fiber receiving port HR2 of the first machine; the optical fiber terminal HT1 of the third machine is connected with the optical fiber receiving port HR1 of the second machine, the optical fiber terminal HT1 of the second machine is connected with the optical fiber receiving port HR1 of the first machine, and the optical fiber terminal HT1 of the first machine is connected with the optical fiber receiving port HR1 of the third machine to form annular connection.
Further, the optical fiber terminal HT1 and the optical fiber terminal HT2 have the same structure, the optical fiber terminal HT1 includes a transmitting terminal U1 and a driver U5, the optical fiber terminal HT2 includes a transmitting terminal U2 and a driver U6, and one end of an upper end contact and one end of a lower end contact of the relay KM1 are both connected with the transmitting terminal U1 through the driver U5; the transmitting terminal U2 is connected with the driver U6, and the other end of the upper end contact of the relay KM4, the other end of the upper end contact of the driver U6 and the relay KM2 and the other end of the lower end contact of the relay KM3 are connected.
Further, the structure of the fiber receiving port HR1 and the structure of the fiber receiving port HR2 are the same, the fiber receiving port HR1 includes a receiving terminal U3 and a driver U7, the fiber receiving port HR2 includes a receiving terminal U4 and a driver U8, the receiving terminal U3 is connected with the driver U7, and one end of an upper end contact and one end of a lower end contact of the relay KM4 are both connected with the driver U7; the receiving terminal U4 is connected with the driver U8, and the other end of the upper end contact of the relay KM1, the other end of the lower end contact of the driver U8 and the relay KM2 and the other end of the upper end contact of the relay KM3 are connected.
Further, the transmission terminal U1 and the transmission terminal U2 are of the HFRB-1521 type.
Further, the signals of the receiving terminal U3 and the receiving terminal U4 are HFRB-2521.
Still further, the types of the drivers U5, U6, U7 and U8 are 74LS06.
Further, the types of the relays KM1 to KM4 are G6S-2F DC5.
The invention has the advantages that:
(1) When the contacts at the lower ends of the relays KM1 to KM4 are all closed, the current machine is a host; when contacts at the upper ends of the relays KM1 and KM4 are all closed, the current machine is a slave machine, and the free switching between the master machine and the slave machine is realized by controlling the contacts of the relays, so that the use is convenient.
(2) The invention realizes the parallel operation of a plurality of machines by setting the connection mode of the optical fiber communication circuit of each machine, and realizes the master-slave switching of each machine by controlling the relay of the optical fiber communication circuit of each machine, thereby realizing multi-machine communication.
Drawings
FIG. 1 is a schematic diagram of a circuit suitable for multi-machine fiber communication in accordance with an embodiment of the present invention;
FIG. 2 is a wiring diagram of a current machine as a host in a circuit suitable for multi-machine optical fiber communication according to an embodiment of the present invention;
FIG. 3 is a wiring diagram of a current machine as a slave in a circuit suitable for multi-machine optical fiber communication according to an embodiment of the present invention;
fig. 4 is a wiring diagram of a parallel operation of multiple machines in a circuit suitable for multi-machine optical fiber communication according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, each machine comprises an optical fiber communication circuit, the optical fiber communication circuit comprises sequentially numbered relays KM1 to KM4, an optical fiber terminal HT1, an optical fiber terminal HT2, an optical fiber receiving port HR1 and an optical fiber receiving port HR2, the relays KM1 to KM4 each comprise an upper end contact and a lower end contact, one end of the upper end contact and one end of the lower end contact of the relay KM1 are connected with the optical fiber terminal HT1, one end of the upper end contact and one end of the lower end contact of the relay KM2 are connected with a signal receiving end Rxd, one end of the upper end contact and one end of the lower end contact of the relay KM3 are connected with a signal transmitting end Txd, and one end of the upper end contact and one end of the lower end contact of the relay KM4 are connected with the optical fiber receiving port HR 1; the other end of the lower end contact of the relay KM1 is suspended, and the other end of the upper end contact of the relay KM1, the optical fiber receiving port HR2, the other end of the lower end contact of the relay KM2 and the other end of the upper end contact of the relay KM3 are connected; the other end of the lower end contact of the relay KM4 is suspended, and the other end of the upper end contact of the relay KM4, the optical fiber terminal HT2, the other end of the upper end contact of the relay KM2 and the other end of the lower end contact of the relay KM3 are connected.
With continued reference to fig. 1, the optical fiber terminal HT1 and the optical fiber terminal HT2 have the same structure, the optical fiber terminal HT1 includes a transmitting terminal U1 and a driver U5, the optical fiber terminal HT2 includes a transmitting terminal U2 and a driver U6, and one end of an upper end contact and one end of a lower end contact of the relay KM1 are connected with the transmitting terminal U1 through the driver U5; the transmitting terminal U2 is connected with the driver U6, and the other end of the upper end contact of the relay KM4, the other end of the upper end contact of the driver U6 and the relay KM2 and the other end of the lower end contact of the relay KM3 are connected.
With continued reference to fig. 1, the optical fiber receiving port HR1 and the optical fiber receiving port HR2 have the same structure, the optical fiber receiving port HR1 includes a receiving terminal U3 and a driver U7, the optical fiber receiving port HR2 includes a receiving terminal U4 and a driver U8, the receiving terminal U3 is connected with the driver U7, and one end of an upper end contact of the relay KM4 and one end of a lower end contact of the relay KM are both connected with the driver U7; the receiving terminal U4 is connected with the driver U8, and the other end of the upper end contact of the relay KM1, the other end of the lower end contact of the driver U8 and the relay KM2 and the other end of the upper end contact of the relay KM3 are connected. The model of the transmitting terminal U1 and the transmitting terminal U2 is HFRB-1521. The signal at the receiving terminal U3 and the receiving terminal U4 is HFRB-2521. The types of the drivers U5, U6, U7 and U8 are 74LS06. The types of the relays KM1 to KM4 are G6S-2F DC5.
As shown in fig. 2, when the contacts at the lower ends of the relays KM1 to KM4 are all closed, the signal transmitting terminal Txd transmits a signal to the optical fiber terminal HT2, and the signal receiving terminal Rxd receives a signal from the optical fiber receiving port HR2, and the current machine is the host.
As shown in fig. 3, when the upper contacts of the relays KM1 to KM4 are all closed, the signal transmitting terminal Txd transmits a signal to the optical fiber receiving port HR2, and the signal receiving terminal Rxd receives a signal from the optical fiber terminal HT2, and the current machine is a slave.
The optical fiber terminal HT2 of the first machine 1 is connected with the optical fiber receiving port HR2 of the second machine 2, the optical fiber terminal HT2 of the second machine 2 is connected with the optical fiber receiving port HR2 of the third machine 3, and the optical fiber terminals HT2 of the N machine are connected with the optical fiber receiving port HR2 of the first machine 1 in sequence according to the rule; the optical fiber terminal HT1 of the N-th machine is connected with the optical fiber receiving port HR1 of the N-1 th machine, the optical fiber terminal HT1 of the N-1 th machine is connected with the optical fiber receiving port HR1 of the N-2 th machine, the optical fiber terminals HT1 of the second machine 2 are connected with the optical fiber receiving port HR1 of the first machine 1 in sequence according to the rule, and the optical fiber terminal HT1 of the first machine 1 is connected with the optical fiber receiving port HR1 of the N-th machine to form annular connection.
As shown in fig. 4, taking 3 machines as an example, the 3 machines are numbered in sequence from the first machine 1 to the third machine 3, the optical fiber terminal HT2 of the first machine 1 is connected to the optical fiber receiving port HR2 of the second machine 2, the optical fiber terminal HT2 of the second machine 2 is connected to the optical fiber receiving port HR2 of the third machine 3, and the optical fiber terminal HT2 of the third machine 3 is connected to the optical fiber receiving port HR2 of the first machine 1; the optical fiber terminal HT1 of the third machine 3 is connected to the optical fiber receiving port HR1 of the second machine 2, the optical fiber terminal HT1 of the second machine 2 is connected to the optical fiber receiving port HR1 of the first machine 1, and the optical fiber terminal HT1 of the first machine 1 is connected to the optical fiber receiving port HR1 of the third machine 3 to form a ring connection.
Through the technical scheme, when the contacts at the lower ends of the relays KM1 to KM4 are all closed, the current machine is a host; when contacts at the upper ends of the relays KM1 and KM4 are all closed, the current machine is a slave machine, and the free switching between the master machine and the slave machine is realized by controlling the contacts of the relays, so that the use is convenient.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The circuit is characterized in that the circuit is applied to each machine and is an optical fiber communication circuit, the optical fiber communication circuit comprises sequentially numbered relays KM1 to KM4, an optical fiber terminal HT1, an optical fiber terminal HT2, an optical fiber receiving port HR1 and an optical fiber receiving port HR2, the relays KM1 to KM4 comprise upper end contacts and lower end contacts, one ends of the upper end contacts and the lower end contacts of the relays KM1 are connected with the optical fiber terminal HT1, one ends of the upper end contacts and the lower end contacts of the relays KM2 are connected with a signal receiving end Rxd, one ends of the upper end contacts and the lower end contacts of the relays KM3 are connected with a signal transmitting end Txd, and one ends of the upper end contacts and the lower end contacts of the relays KM4 are connected with the optical fiber receiving port HR 1; the other end of the lower end contact of the relay KM1 is suspended, and the other end of the upper end contact of the relay KM1, the optical fiber receiving port HR2, the other end of the lower end contact of the relay KM2 and the other end of the upper end contact of the relay KM3 are connected; the other end of the lower end contact of the relay KM4 is suspended, and the other end of the upper end contact of the relay KM4, the optical fiber terminal HT2, the other end of the upper end contact of the relay KM2 and the other end of the lower end contact of the relay KM3 are connected; when the contacts at the lower ends of the relays KM1 and KM4 are all closed, the current machine is a host; when the upper end contacts of the relays KM1 to KM4 are all closed, the current machine is a slave machine;
the optical fiber terminal HT2 of the first machine is connected with the optical fiber receiving port HR2 of the second machine, the optical fiber terminal HT2 of the second machine is connected with the optical fiber receiving port HR2 of the third machine, and the optical fiber terminals HT2 of the N machine are connected with the optical fiber receiving port HR2 of the first machine in sequence according to the rule; the optical fiber terminal HT1 of the N-th machine is connected with the optical fiber receiving port HR1 of the N-1 th machine, the optical fiber terminal HT1 of the N-1 th machine is connected with the optical fiber receiving port HR1 of the N-2 th machine, the optical fiber terminals HT1 of the second machine are connected with the optical fiber receiving port HR1 of the first machine in sequence according to the rule, and the optical fiber terminal HT1 of the first machine is connected with the optical fiber receiving port HR1 of the N-th machine to form annular connection.
2. The circuit of claim 1, wherein the machines have 3 machines, numbered first machine to third machine, the fiber terminal HT2 of the first machine being connected to the fiber receiving port HR2 of the second machine, the fiber terminal HT2 of the second machine being connected to the fiber receiving port HR2 of the third machine, the fiber terminal HT2 of the third machine being connected to the fiber receiving port HR2 of the first machine; the optical fiber terminal HT1 of the third machine is connected with the optical fiber receiving port HR1 of the second machine, the optical fiber terminal HT1 of the second machine is connected with the optical fiber receiving port HR1 of the first machine, and the optical fiber terminal HT1 of the first machine is connected with the optical fiber receiving port HR1 of the third machine to form annular connection.
3. The circuit for multi-machine optical fiber communication according to claim 1, wherein the optical fiber terminal HT1 and the optical fiber terminal HT2 have the same structure, the optical fiber terminal HT1 includes a transmitting terminal U1 and a driver U5, the optical fiber terminal HT2 includes a transmitting terminal U2 and a driver U6, and one end of an upper end contact and one end of a lower end contact of the relay KM1 are connected to the transmitting terminal U1 through the driver U5; the transmitting terminal U2 is connected with the driver U6, and the other end of the upper end contact of the relay KM4, the other end of the upper end contact of the driver U6 and the relay KM2 and the other end of the lower end contact of the relay KM3 are connected.
4. A circuit suitable for multi-machine optical fiber communication according to claim 3, wherein the optical fiber receiving port HR1 and the optical fiber receiving port HR2 have the same structure, the optical fiber receiving port HR1 comprises a receiving terminal U3 and a driver U7, the optical fiber receiving port HR2 comprises a receiving terminal U4 and a driver U8, the receiving terminal U3 is connected with the driver U7, and one end of an upper end contact and one end of a lower end contact of the relay KM4 are both connected with the driver U7; the receiving terminal U4 is connected with the driver U8, and the other end of the upper end contact of the relay KM1, the other end of the lower end contact of the driver U8 and the relay KM2 and the other end of the upper end contact of the relay KM3 are connected.
5. The circuit of claim 4, wherein the transmission terminal U1 and the transmission terminal U2 are of HFRB-1521 type.
6. The circuit of claim 4, wherein the signal at the receiving terminal U3 and the receiving terminal U4 is HFRB-2521.
7. The circuit of claim 4, wherein the types of the drivers U5, U6, U7 and U8 are 74LS06.
8. A circuit suitable for multi-machine optical fiber communication according to claim 1, wherein the type of the relay KM1 to the relay KM4 is G6S-2f DC5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111454475.4A CN114339485B (en) | 2021-12-01 | 2021-12-01 | Circuit suitable for multi-machine optical fiber communication |
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| CN202111454475.4A CN114339485B (en) | 2021-12-01 | 2021-12-01 | Circuit suitable for multi-machine optical fiber communication |
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| CN114339485B true CN114339485B (en) | 2023-08-22 |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES182445A1 (en) * | 1946-07-08 | 1948-04-16 | Standard Electrica Sa | IMPROVEMENTS IN TELEGRAPHIC SWITCHING SYSTEMS |
| JPS63155119A (en) * | 1986-12-19 | 1988-06-28 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber line switching method and optical fiber switch |
| EP0671833A2 (en) * | 1994-03-09 | 1995-09-13 | Sharp Kabushiki Kaisha | A microcomputer control optical fiber transmission system |
| DE102009047168A1 (en) * | 2009-11-26 | 2011-06-01 | Würth Elektronik Ics Gmbh & Co. Kg | Electronic relay, electronic system and method for switching a power current |
| CN102405650A (en) * | 2009-04-16 | 2012-04-04 | 大日精化工业株式会社 | Optical path switching type optical signal transmission/reception apparatus and relevant optical signal transmission/reception method |
| CN103392302A (en) * | 2011-02-25 | 2013-11-13 | 奥兰若技术有限公司 | Optical path switching |
| CN103929246A (en) * | 2010-09-29 | 2014-07-16 | 江苏省电力公司常州供电公司 | Working method of optical path switching interface mechanism for optical fiber channel test of relay protection device |
| CN106055509A (en) * | 2016-05-31 | 2016-10-26 | 珠海格力电器股份有限公司 | Optical fiber communication system and configuration method of optical fiber communication |
| WO2018094615A1 (en) * | 2016-11-23 | 2018-05-31 | 天津市普迅电力信息技术有限公司 | Control circuit for remote activation of master/slave industrial control equipment |
| CN110932645A (en) * | 2019-12-30 | 2020-03-27 | 卧龙电气集团辽宁荣信电气传动有限公司 | High-voltage frequency converter dual-control machine redundancy topology structure and control method |
| CN211554266U (en) * | 2019-11-28 | 2020-09-22 | 合肥科威尔电源系统股份有限公司 | Multichannel direct current source series-parallel switching device |
-
2021
- 2021-12-01 CN CN202111454475.4A patent/CN114339485B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES182445A1 (en) * | 1946-07-08 | 1948-04-16 | Standard Electrica Sa | IMPROVEMENTS IN TELEGRAPHIC SWITCHING SYSTEMS |
| JPS63155119A (en) * | 1986-12-19 | 1988-06-28 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber line switching method and optical fiber switch |
| EP0671833A2 (en) * | 1994-03-09 | 1995-09-13 | Sharp Kabushiki Kaisha | A microcomputer control optical fiber transmission system |
| CN102405650A (en) * | 2009-04-16 | 2012-04-04 | 大日精化工业株式会社 | Optical path switching type optical signal transmission/reception apparatus and relevant optical signal transmission/reception method |
| DE102009047168A1 (en) * | 2009-11-26 | 2011-06-01 | Würth Elektronik Ics Gmbh & Co. Kg | Electronic relay, electronic system and method for switching a power current |
| CN103929246A (en) * | 2010-09-29 | 2014-07-16 | 江苏省电力公司常州供电公司 | Working method of optical path switching interface mechanism for optical fiber channel test of relay protection device |
| CN103392302A (en) * | 2011-02-25 | 2013-11-13 | 奥兰若技术有限公司 | Optical path switching |
| CN106055509A (en) * | 2016-05-31 | 2016-10-26 | 珠海格力电器股份有限公司 | Optical fiber communication system and configuration method of optical fiber communication |
| WO2018094615A1 (en) * | 2016-11-23 | 2018-05-31 | 天津市普迅电力信息技术有限公司 | Control circuit for remote activation of master/slave industrial control equipment |
| CN211554266U (en) * | 2019-11-28 | 2020-09-22 | 合肥科威尔电源系统股份有限公司 | Multichannel direct current source series-parallel switching device |
| CN110932645A (en) * | 2019-12-30 | 2020-03-27 | 卧龙电气集团辽宁荣信电气传动有限公司 | High-voltage frequency converter dual-control machine redundancy topology structure and control method |
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