CN202351316U - Electric energy meter - Google Patents
Electric energy meter Download PDFInfo
- Publication number
- CN202351316U CN202351316U CN2011204205089U CN201120420508U CN202351316U CN 202351316 U CN202351316 U CN 202351316U CN 2011204205089 U CN2011204205089 U CN 2011204205089U CN 201120420508 U CN201120420508 U CN 201120420508U CN 202351316 U CN202351316 U CN 202351316U
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- CN
- China
- Prior art keywords
- pin
- electric energy
- energy meter
- microprocessor
- photoisolator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses an electric energy meter, which comprises a microprocessor (1) and an RS485 communication circuit (2), wherein the electric energy meter further comprises a photoelectric isolating circuit (3) capable of preventing industrial site interference, an interface end of the photoelectric isolating circuit (3) is connected with the microprocessor (1), and the other interface end of the photoelectric isolating circuit (3) is connected with the RS485 communication circuit (2). The electric energy meter has the advantages of greatly improving the electric isolation and anti-interference capability, so that the electric energy meter is capable of completely avoiding the interference of an on-site environment if being operated on an industrial site, thereby guaranteeing the normal communication of the electric energy meter and avoiding the loss of metering data of the electric energy meter.
Description
Technical field
The utility model relates to the electric energy meter technical field, specifically is a kind of electric energy meter.
Background technology
The electric energy meter of prior art comprises microprocessor and RS485 telecommunication circuit, and said microprocessor is connected with the RS485 telecommunication circuit.There is following defective in the electric energy meter of said structure in the use of reality: the electric energy meter of prior art is vulnerable to the interference of site environment when in industry spot, moving; Therefore can influence the normal communication of electric energy meter; Cause losing of electric energy meter continuous data, even can damage electric energy meter.
The utility model content
The technical matters that the utility model will solve is, overcomes the defective of above prior art, and a kind of electric energy meter that can prevent that industry spot from disturbing is provided.
The technical scheme of the utility model is; A kind of electric energy meter is provided; Comprise microprocessor and RS485 telecommunication circuit; It comprises that also one can prevent the photoelectric isolating circuit that industry spot is disturbed, and an interface end of said photoelectric isolating circuit is connected with microprocessor, and another interface end of said photoelectric isolating circuit is connected with the RS485 telecommunication circuit.
Described photoelectric isolating circuit comprises photoisolator T1, T2, T3 and resistance R 1, R2, R3; Transmitting terminal 1 pin of said photoisolator T1 is connected with working power VCC, and transmitting terminal 2 pin are connected with an end of resistance R 3, and receiving end 3 pin of said photoisolator T1 are connected with the RXD pin of microprocessor, and receiving end 4 pin are connected with the common ground pin; The other end of said resistance R 3 is connected with the RS485 telecommunication circuit; Transmitting terminal 1 pin of said photoisolator T2 is connected with working power VCC; Transmitting terminal 2 pin are connected with the TXD pin of microprocessor; Receiving end 3 pin of said photoisolator T2 are connected with an end, the RS485 telecommunication circuit of resistance R 2, and receiving end 4 pin are connected with the common ground pin; The other end of said resistance R 2 is connected with working power VCC; Transmitting terminal 1 pin of said photoisolator T3 is connected with the RXD pin of microprocessor through resistance R 1; Transmitting terminal 2 pin are connected with the I/O mouth of microprocessor; Receiving end 3 pin of said photoisolator T3 are connected with working power VCC, and receiving end 4 pin are connected with the RS485 telecommunication circuit.
After adopting above structure, the utility model compared with prior art has the following advantages:
The utility model electric energy meter is provided with a photoelectric isolating circuit between microprocessor and RS485 telecommunication circuit; Make signal one-way transmission, input end and output terminal realize that fully electrical isolation, antijamming capability are greatly improved through this photoelectric isolating circuit; Therefore electric energy meter can avoid receiving the interference of site environment fully when industry spot is moved; Thereby guaranteed the normal communication of electric energy meter, guaranteed not losing of electric energy meter continuous data.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model electric energy meter.
Fig. 2 is the circuit theory diagrams of the utility model electric energy meter.
Shown in the figure 1, microprocessor, 2, the RS485 telecommunication circuit, 3, photoelectric isolating circuit.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.
Like Fig. 1, shown in Figure 2, a kind of electric energy meter of the utility model comprises microprocessor 1 and RS485 telecommunication circuit 2, and microprocessor 1 and RS485 telecommunication circuit 2 all are prior aries, is not detailing; Described electric energy meter comprises that also one can prevent the photoelectric isolating circuit 3 that industry spot is disturbed, and an interface end of said photoelectric isolating circuit 3 is connected with microprocessor 1, and another interface end of said photoelectric isolating circuit 3 is connected with RS485 telecommunication circuit 2.
Described photoelectric isolating circuit 3 comprises photoisolator T1, T2, T3 and resistance R 1, R2, R3; Transmitting terminal 1 pin of said photoisolator T1 is connected with working power VCC, and transmitting terminal 2 pin are connected with an end of resistance R 3, and receiving end 3 pin of said photoisolator T1 are connected with the RXD pin of microprocessor 1, and receiving end 4 pin are connected with the common ground pin; The other end of said resistance R 3 is connected with RS485 telecommunication circuit 2, and the other end of promptly said resistance R 3 is connected with the RO pin of RS485 telecommunication circuit 2; Transmitting terminal 1 pin of said photoisolator T2 is connected with working power VCC; Transmitting terminal 2 pin are connected with the TXD pin of microprocessor 1; Receiving end 3 pin of said photoisolator T2 are connected with an end, the RS485 telecommunication circuit 2 of resistance R 2; Receiving end 3 pin that are photoisolator T2 are connected with an end, the RE of RS485 telecommunication circuit 2, the DE of resistance R 2, and receiving end 4 pin are connected with the common ground pin; The other end of said resistance R 2 is connected with working power VCC; Transmitting terminal 1 pin of said photoisolator T3 is connected with the RXD pin of microprocessor 1 through resistance R 1; Transmitting terminal 2 pin are connected with the I/O mouth of microprocessor 1; Receiving end 3 pin of said photoisolator T3 are connected with working power VCC; Receiving end 4 pin are connected with RS485 telecommunication circuit 2, and promptly receiving end 4 pin are connected with the common ground pin of RS485 telecommunication circuit 2 through resistance R 4.
Below only be described, but can not be interpreted as it is restriction claim with regard to the most preferred embodiment of the utility model.The utility model is not limited only to above embodiment, and its concrete structure allows variation.In every case the various variations of in the protection domain of the utility model independent claims, being done are all in the protection domain at the utility model.
Claims (2)
1. electric energy meter; Comprise microprocessor (1) and RS485 telecommunication circuit (2); It is characterized in that: it comprises that also one can prevent the photoelectric isolating circuit (3) that industry spot is disturbed; One interface end of said photoelectric isolating circuit (3) is connected with microprocessor (1), and another interface end of said photoelectric isolating circuit (3) is connected with RS485 telecommunication circuit (2).
2. electric energy meter according to claim 1 is characterized in that: described photoelectric isolating circuit (3) comprises photoisolator T1, T2, T3 and resistance R 1, R2, R3; Transmitting terminal 1 pin of said photoisolator T1 is connected with working power VCC, and transmitting terminal 2 pin are connected with an end of resistance R 3, and receiving end 3 pin of said photoisolator T1 are connected with the RXD pin of microprocessor (1), and receiving end 4 pin are connected with the common ground pin; The other end of said resistance R 3 is connected with RS485 telecommunication circuit (2); Transmitting terminal 1 pin of said photoisolator T2 is connected with working power VCC; Transmitting terminal 2 pin are connected with the TXD pin of microprocessor (1); Receiving end 3 pin of said photoisolator T2 are connected with an end of resistance R 2, RS485 telecommunication circuit (2), and receiving end 4 pin are connected with the common ground pin; The other end of said resistance R 2 is connected with working power VCC; Transmitting terminal 1 pin of said photoisolator T3 is connected through the RXD pin of resistance R 1 with microprocessor (1); Transmitting terminal 2 pin are connected with the I/O mouth of microprocessor (1); Receiving end 3 pin of said photoisolator T3 are connected with working power VCC, and receiving end 4 pin are connected with RS485 telecommunication circuit (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204205089U CN202351316U (en) | 2011-10-28 | 2011-10-28 | Electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204205089U CN202351316U (en) | 2011-10-28 | 2011-10-28 | Electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202351316U true CN202351316U (en) | 2012-07-25 |
Family
ID=46540312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204205089U Expired - Lifetime CN202351316U (en) | 2011-10-28 | 2011-10-28 | Electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202351316U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108918960A (en) * | 2018-06-19 | 2018-11-30 | 宁波迦南智能电气股份有限公司 | It is a kind of to measure and the completely isolated intelligent electric energy meter of management function |
-
2011
- 2011-10-28 CN CN2011204205089U patent/CN202351316U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108918960A (en) * | 2018-06-19 | 2018-11-30 | 宁波迦南智能电气股份有限公司 | It is a kind of to measure and the completely isolated intelligent electric energy meter of management function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 315191 Yinzhou Industrial Park, Zhejiang, Ningbo, Yinzhou District, Ningbo Patentee after: NINGBO SANXING MEDICAL ELECTRIC CO., LTD. Address before: 315131, AUX Industrial Park, Mingguang North Road, Jiangshan Town, Ningbo, Yinzhou District, Zhejiang 1166, China Patentee before: Ningbo Sanxing Electric Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120725 |
|
| CX01 | Expiry of patent term |