CN103344801B - Power line carrier communication isolation device for intelligent electric meter - Google Patents
Power line carrier communication isolation device for intelligent electric meter Download PDFInfo
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- CN103344801B CN103344801B CN201310282463.7A CN201310282463A CN103344801B CN 103344801 B CN103344801 B CN 103344801B CN 201310282463 A CN201310282463 A CN 201310282463A CN 103344801 B CN103344801 B CN 103344801B
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- signaling interface
- electrically connected
- carrier communication
- line carrier
- power line
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Abstract
The invention provides a kind of power line carrier communication isolation device for intelligent electric meter, comprising: shell, power line carrier communication circuit and buffer circuit; Described power line carrier communication circuit and described buffer circuit are arranged on described enclosure; One end electrical connection of described power line carrier communication circuit and described buffer circuit; The other end of described buffer circuit is used for being electrically connected with the base table of intelligent electric meter.Power line carrier communication isolation device for intelligent electric meter provided by the invention, when this power line carrier communication spacer assembly is connected with base table, then base table and power line carrier communication spacer assembly are two autonomous devices, and power line carrier communication spacer assembly and base table form intelligent electric meter jointly.Therefore, when having high power pulse or surge pours into base table, power line carrier communication spacer assembly can not be damaged; Meanwhile, when having high power pulse or surge to pour into power line carrier communication spacer assembly, also can not damage base table, thus enhance the safety and reliability of whole system.
Description
Technical field
The invention belongs to power-line carrier communication field, be specifically related to a kind of power line carrier communication isolation device for intelligent electric meter.
Background technology
Power line carrier communication is the communication mode transmitting data using distribution wire as information transmitting medium.Because power line network is the network that current coverage is the widest, therefore, there is huge potential value.
At present, power-line carrier communication is combined with ammeter, can intelligent electric meter be designed, thus realize the effect of remote meter reading.Its principle of work is: base table is uploaded to Power Line Carrier Communication Module by measuring the electric quantity data obtained, and the electric quantity data received is converted into the signal format being adapted at line of electric force transmits by Power Line Carrier Communication Module; Then the signal that obtains will be transformed by power line transmission to concentrator; Concentrator communicates with host computer, thus realizes remote meter reading.
But realizing in process of the present invention, inventor finds, prior art at least exists following problem:
The mode that GND altogether is directly connected is adopted between base table with Power Line Carrier Communication Module, therefore, once after having high power pulse or surge to be circulated into base table or Power Line Carrier Communication Module, due to whole system GND altogether, dangerous voltage or electric current can flow through whole system relevant portion, cause whole system to be damaged; Such as, when having high power pulse or surge is circulated into base table, also can be circulated into Power Line Carrier Communication Module inside, thus not only cause base table breaking-up, also result in Power Line Carrier Communication Module and damage, therefore, increase the loss that harm causes.
Summary of the invention
For the defect that prior art exists, the invention provides a kind of power line carrier communication isolation device for intelligent electric meter, when this power line carrier communication spacer assembly is connected with base table, then base table and power line carrier communication spacer assembly are two autonomous devices, thus enhance the safety and reliability of whole system.
The technical solution used in the present invention is as follows:
The invention provides a kind of power line carrier communication isolation device for intelligent electric meter, comprising: shell, power line carrier communication circuit and buffer circuit; Described power line carrier communication circuit and described buffer circuit are arranged on described enclosure; One end electrical connection of described power line carrier communication circuit and described buffer circuit; The other end of described buffer circuit is used for being electrically connected with the base table of intelligent electric meter.
Preferably, described buffer circuit comprises signal isolation circuit and power isolation circuit.
Preferably, described power isolation circuit adopts DC/DC insulating power supply chip; Described DC/DC insulating power supply chip is used for being electrically connected with described base table 12V power interface.
Preferably, described DC/DC insulating power supply chip is the H1212RN-2W insulating power supply chip of MORNSON company.
Preferably, described signal isolation circuit adopts digital isolating chip; Described digital isolating chip is used for being electrically connected with more than one signaling interfaces of described base table.
Preferably, described digital isolating chip is the ADUM1401 numeral isolating chip of TI company.
Preferably, described signaling interface is one or more in EVENOUT signaling interface, STA signaling interface, RST signaling interface, RXD signaling interface, SET signaling interface and TXD signaling interface.
Preferably, described power line carrier communication circuit comprises main control chip; Described main control chip arranges EVENOUT-b signaling interface, RST-b signaling interface, RXD-b signaling interface, STA-b signaling interface, SET-b signaling interface and TXD-b signaling interface;
Described signal isolation circuit comprises the first signal isolation circuit and secondary signal buffer circuit; Described first signal isolation circuit arranges EVENOUT-c signaling interface, RST-c signaling interface, RXD-c signaling interface, STA-c signaling interface, EVENOUT-a signaling interface, RST-a signaling interface, RXD-a signaling interface, STA-a signaling interface; Described secondary signal buffer circuit arranges SET-c signaling interface, TXD-c signaling interface, SET-a signaling interface, TXD-a signaling interface;
The base table of described intelligent electric meter arranges EVENOUT-d signaling interface, RST-d signaling interface, RXD-d signaling interface, STA-d signaling interface, SET-d signaling interface and TXD-d signaling interface;
Wherein, described EVENOUT-d signaling interface is electrically connected with described EVENOUT-a signaling interface, described RST-d signaling interface is electrically connected with described RST-a signaling interface, described RXD-d signaling interface is electrically connected with described RXD-a signaling interface, and described STA-d signaling interface is electrically connected with described STA-a signaling interface; Described SET-d signaling interface is electrically connected with described SET-a signaling interface; Described TXD-d signaling interface is electrically connected with described TXD-a signaling interface;
Described EVENOUT-c signaling interface is electrically connected with described EVENOUT-b signaling interface; Described RST-c signaling interface is electrically connected with described RST-b signaling interface; Described RXD-c signaling interface is electrically connected with described RXD-b signaling interface; Described STA-c signaling interface is electrically connected with described STA-b signaling interface;
Described SET-c signaling interface is electrically connected with described SET-b signaling interface; Described TXD-c signaling interface is electrically connected with described TXD-b signaling interface.
Beneficial effect of the present invention is as follows:
Power line carrier communication isolation device for intelligent electric meter provided by the invention, when this power line carrier communication spacer assembly is connected with base table, then base table and power line carrier communication spacer assembly are two autonomous devices, and power line carrier communication spacer assembly and base table form intelligent electric meter jointly.Therefore, when having high power pulse or surge pours into base table, power line carrier communication spacer assembly can not be damaged; Meanwhile, when having high power pulse or surge to pour into power line carrier communication spacer assembly, also can not damage base table, thus enhance the safety and reliability of whole system.
Accompanying drawing explanation
Fig. 1 is the structural representation of power line carrier communication isolation device for intelligent electric meter provided by the invention;
Fig. 2 is the base table cover-opening structure schematic diagram of intelligent electric meter provided by the invention;
Fig. 3 is the front schematic view of power line carrier communication circuit provided by the invention;
Fig. 4 is the side schematic view of power line carrier communication circuit provided by the invention;
Fig. 5 is the end face schematic diagram of power line carrier communication circuit provided by the invention;
Fig. 6 is base table provided by the invention and power line carrier communication circuit interface definition figure;
Fig. 7 is the concrete connecting circuit figure of one of power isolation circuit provided by the invention;
Fig. 8 is a kind of concrete signal isolation circuit figure provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail:
As shown in Figure 1, the invention provides a kind of power line carrier communication isolation device for intelligent electric meter, comprising: shell, power line carrier communication circuit and buffer circuit; Power line carrier communication circuit and buffer circuit are arranged on enclosure; One end electrical connection of power line carrier communication circuit and buffer circuit; The other end of buffer circuit is used for being electrically connected with the base table of intelligent electric meter.
In the present invention, buffer circuit comprises signal isolation circuit and power isolation circuit, all kinds of signal transmission is isolated by signal isolation circuit, by the curtage of power isolation circuit isolation transmission, thus the comprehensive electrical isolation achieved between the base table of intelligent electric meter and power line carrier communication circuit, ensure that the security of system.As shown in Figure 2, be the base table cover-opening structure schematic diagram of intelligent electric meter provided by the invention; As in Figure 3-5, be the structural representation of power line carrier communication circuit provided by the invention.As shown in Figure 6, for according to State Grid Corporation of China company standard Q/GDW355-2009 requirement, base table and power line carrier communication circuit interface define schemes.Wherein, wherein there are 7 signaling interfaces (comprising state), are respectively: RESERVE signaling interface, EVENOUT signaling interface, STA signaling interface, RST signaling interface, RXD signaling interface, SET signaling interface and TXD signaling interface; 5 power interfaces are respectively: VDD power interface, VSS power interface and VCC power interface.The definition of signaling interface and power interface is as shown in table 1.
Table 1
Below power isolation circuit and signal isolation circuit is introduced respectively:
(1) power isolation circuit
To the 12V power interface of base table, power isolation circuit can adopt DC/DC insulating power supply chip; Wherein, DC/DC insulating power supply chip includes but not limited to the H1212RN-2W insulating power supply chip of MORNSON company, and this insulating power supply chip power conversion efficiency is 80%, realizes 6000Vrms physical isolation.As shown in Figure 7, the concrete connecting circuit figure of one for power isolation circuit: insulating power supply chip side a termination base table 12V power interface and GND interface, namely 12Va and 12V is direct-connected, GND and GNDa is direct-connected, the PA power amplification circuit of side b termination power line carrier communication circuit in addition, isolation and amplifier 12Vb is that PA powers, realize the isolation of 12V power interface, b side exports 12Vb and is connected to LTC3631, export 3.3Vb voltage supply power line carrier communication circuit to use, so both achieve physical isolation between base table and power line carrier communication circuit, employ DC/DC simultaneously, relative to linear LDO, improve power supply conversion efficiency.
For 5V power interface, be connected to 5Va, use as digital isolating chip base table side power supply station.
(2) signal isolation circuit
Signal isolation circuit adopts digital isolating chip; Numeral isolating chip is used for being electrically connected with more than one signaling interfaces of base table.Wherein, digital isolating chip includes but not limited to the ADUM1401 numeral isolating chip of TI company.EVENOUT signaling interface, STA signaling interface, RST signaling interface, RXD signaling interface, SET signaling interface and TXD signaling interface totally six kinds of signaling interfaces are set for base table, introduce a kind of concrete signal isolation circuit.
As shown in Figure 8, power line carrier communication circuit comprises main control chip; Main control chip arranges EVENOUT-b signaling interface, RST-b signaling interface, RXD-b signaling interface, STA-b signaling interface, SET-b signaling interface and TXD-b signaling interface;
Described signal isolation circuit comprises the first signal isolation circuit and secondary signal buffer circuit; Described first signal isolation circuit arranges EVENOUT-c signaling interface, RST-c signaling interface, RXD-c signaling interface, STA-c signaling interface, EVENOUT-a signaling interface, RST-a signaling interface, RXD-a signaling interface, STA-a signaling interface; Described secondary signal buffer circuit arranges SET-c signaling interface, TXD-c signaling interface, SET-a signaling interface, TXD-a signaling interface;
The base table of described intelligent electric meter arranges EVENOUT-d signaling interface, RST-d signaling interface, RXD-d signaling interface, STA-d signaling interface, SET-d signaling interface and TXD-d signaling interface;
Wherein, described EVENOUT-d signaling interface is electrically connected with described EVENOUT-a signaling interface, described RST-d signaling interface is electrically connected with described RST-a signaling interface, described RXD-d signaling interface is electrically connected with described RXD-a signaling interface, and described STA-d signaling interface is electrically connected with described STA-a signaling interface; Described SET-d signaling interface is electrically connected with described SET-a signaling interface; Described TXD-d signaling interface is electrically connected with described TXD-a signaling interface;
Described EVENOUT-c signaling interface is electrically connected with described EVENOUT-b signaling interface; Described RST-c signaling interface is electrically connected with described RST-b signaling interface; Described RXD-c signaling interface is electrically connected with described RXD-b signaling interface; Described STA-c signaling interface is electrically connected with described STA-b signaling interface;
Described SET-c signaling interface is electrically connected with described SET-b signaling interface; Described TXD-c signaling interface is electrically connected with described TXD-b signaling interface.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should look protection scope of the present invention.
Claims (1)
1. a power line carrier communication isolation device for intelligent electric meter, is characterized in that, comprising: shell, power line carrier communication circuit and buffer circuit; Described power line carrier communication circuit and described buffer circuit are arranged on described enclosure; One end electrical connection of described power line carrier communication circuit and described buffer circuit; The other end of described buffer circuit is used for being electrically connected with the base table of intelligent electric meter;
Wherein, described buffer circuit comprises signal isolation circuit and power isolation circuit;
Wherein, described power isolation circuit adopts DC/DC insulating power supply chip; Described DC/DC insulating power supply chip is used for being electrically connected with described base table 12V power interface;
Wherein, described DC/DC insulating power supply chip is the H1212RN-2W insulating power supply chip of MORNSON company;
Wherein, described signal isolation circuit adopts digital isolating chip; Described digital isolating chip is used for being electrically connected with more than one signaling interfaces of described base table;
Wherein, described digital isolating chip is the ADUM1401 numeral isolating chip of TI company;
Wherein, described signaling interface is one or more in EVENOUT signaling interface, STA signaling interface, RST signaling interface, RXD signaling interface, SET signaling interface and TXD signaling interface;
Wherein, described power line carrier communication circuit comprises main control chip; Described main control chip arranges EVENOUT-b signaling interface, RST-b signaling interface, RXD-b signaling interface, STA-b signaling interface, SET-b signaling interface and TXD-b signaling interface;
Described signal isolation circuit comprises the first signal isolation circuit and secondary signal buffer circuit; Described first signal isolation circuit arranges EVENOUT-c signaling interface, RST-c signaling interface, RXD-c signaling interface, STA-c signaling interface, EVENOUT-a signaling interface, RST-a signaling interface, RXD-a signaling interface, STA-a signaling interface; Described secondary signal buffer circuit arranges SET-c signaling interface, TXD-c signaling interface, SET-a signaling interface, TXD-a signaling interface;
The base table of described intelligent electric meter arranges EVENOUT-d signaling interface, RST-d signaling interface, RXD-d signaling interface, STA-d signaling interface, SET-d signaling interface and TXD-d signaling interface;
Wherein, described EVENOUT-d signaling interface is electrically connected with described EVENOUT-a signaling interface, described RST-d signaling interface is electrically connected with described RST-a signaling interface, described RXD-d signaling interface is electrically connected with described RXD-a signaling interface, and described STA-d signaling interface is electrically connected with described STA-a signaling interface; Described SET-d signaling interface is electrically connected with described SET-a signaling interface; Described TXD-d signaling interface is electrically connected with described TXD-a signaling interface;
Described EVENOUT-c signaling interface is electrically connected with described EVENOUT-b signaling interface; Described RST-c signaling interface is electrically connected with described RST-b signaling interface; Described RXD-c signaling interface is electrically connected with described RXD-b signaling interface; Described STA-c signaling interface is electrically connected with described STA-b signaling interface;
Described SET-c signaling interface is electrically connected with described SET-b signaling interface; Described TXD-c signaling interface is electrically connected with described TXD-b signaling interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310282463.7A CN103344801B (en) | 2013-07-05 | 2013-07-05 | Power line carrier communication isolation device for intelligent electric meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310282463.7A CN103344801B (en) | 2013-07-05 | 2013-07-05 | Power line carrier communication isolation device for intelligent electric meter |
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| CN103344801A CN103344801A (en) | 2013-10-09 |
| CN103344801B true CN103344801B (en) | 2015-09-16 |
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| CN201310282463.7A Expired - Fee Related CN103344801B (en) | 2013-07-05 | 2013-07-05 | Power line carrier communication isolation device for intelligent electric meter |
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| CN110264695B (en) * | 2019-07-09 | 2023-08-11 | 中国民用航空总局第二研究所 | Navigation light monitoring system and method based on power line carrier communication technology |
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| CN201281721Y (en) * | 2008-10-15 | 2009-07-29 | 江阴长仪集团有限公司 | Low-voltage electric power carrier integral meter-recording system |
| CN201440151U (en) * | 2009-01-15 | 2010-04-21 | 深圳浩宁达仪表股份有限公司 | Electric meter provided with independent structure communication module |
| CN201628856U (en) * | 2010-01-26 | 2010-11-10 | 杭州源久科技有限公司 | General collector |
| CN201965753U (en) * | 2011-01-24 | 2011-09-07 | 深圳市森晖电子有限公司 | Acquisition device |
| CN102692531A (en) * | 2012-06-09 | 2012-09-26 | 慈溪市一得电子仪表有限公司 | Carrier meter |
| CN203324328U (en) * | 2013-07-05 | 2013-12-04 | 北京前景无忧电子科技有限公司 | Smart ammeter-used power line carrier communication isolation device |
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- 2013-07-05 CN CN201310282463.7A patent/CN103344801B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201281721Y (en) * | 2008-10-15 | 2009-07-29 | 江阴长仪集团有限公司 | Low-voltage electric power carrier integral meter-recording system |
| CN201440151U (en) * | 2009-01-15 | 2010-04-21 | 深圳浩宁达仪表股份有限公司 | Electric meter provided with independent structure communication module |
| CN201628856U (en) * | 2010-01-26 | 2010-11-10 | 杭州源久科技有限公司 | General collector |
| CN201965753U (en) * | 2011-01-24 | 2011-09-07 | 深圳市森晖电子有限公司 | Acquisition device |
| CN102692531A (en) * | 2012-06-09 | 2012-09-26 | 慈溪市一得电子仪表有限公司 | Carrier meter |
| CN203324328U (en) * | 2013-07-05 | 2013-12-04 | 北京前景无忧电子科技有限公司 | Smart ammeter-used power line carrier communication isolation device |
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