CN106023572A - Remote water meter M-BUS communication chip and single-chip microcomputer connection structure - Google Patents
Remote water meter M-BUS communication chip and single-chip microcomputer connection structure Download PDFInfo
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- CN106023572A CN106023572A CN201610575964.8A CN201610575964A CN106023572A CN 106023572 A CN106023572 A CN 106023572A CN 201610575964 A CN201610575964 A CN 201610575964A CN 106023572 A CN106023572 A CN 106023572A
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- chip
- communication
- chip microcomputer
- water meter
- isolation
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention relates to a remote water meter M-BUS communication chip and single-chip microcomputer connection structure which comprises a single-chip microcomputer of a remote water meter and a communication chip of the remote water meter. An isolation triode Q4 is arranged between a communication serial port of the single-chip microcomputer and a communication serial port of the communication chip in a connected manner, a base resistor R2 of the isolation triode Q4 is connected with an end TX_SW of the single-chip microcomputer, a collector of the isolation triode Q4 is connected with a communication serial port TXD of the single-chip microcomputer, and an emitter of the isolation triode Q4 is connected with a communication serial port MRX of the communication chip and is connected with a power source MVDD through a resistor R4. The remote water meter M-BUS communication chip and single-chip microcomputer connection structure has the advantages that the isolation triode Q4 is additionally arranged between the communication serial ports of two devices, and accordingly, communication crosstalk between the serial ports of the M-BUS chip and the single-chip microcomputer can be prevented, idle current consumption of a base of the isolation triode Q4 can be thoroughly eliminated and the service lives of batteries can be prolonged.
Description
Technical field
The invention belongs to the connection of M-BUS communication technique field, a kind of remote transmitting water meter M-BUS communication chip and single-chip microcomputer
Structure
Background technology
Now with electronic technology and the development of network technology, intelligence instrument industry has been achieved for huge development, intellectual water meter
Application have started to progressively replace the old-fashioned water meter of artificial reading charging, digital telemetering structure water meter popularize the net for data remote
Networkization management brings the attachment structure of extremely efficient way to manage, the most commonly used M-BUS communication chip and single-chip microcomputer such as
Shown in Fig. 1, two equipment of serial connections are direct-connected, and this attachment structure often can between M-BUS chip and microcontroller serial port
Produce communication crosstalk, cause security of system to decline.
At present the application of isolation audion is the most universal, as general isolation audion attachment structure as in figure 2 it is shown, due to
The usual level of TXD is low, and base resistance R2 powers up for a long time, and isolation audion Q4 is constantly in conducting state, thus R2 is electric
Hinder and there is a quiescent current relative to VCC.When being in battery-powered state, the existence of this quiescent current can be substantially reduced
In the service life of battery, it is a problem having to solve, solves this problem, TX end-of-job according to normal logic circuitry
After, immediately R2 is set low, it will cause communication data to interrupt, the problem of communication abnormality.
Summary of the invention
It is an object of the invention to for the deficiencies in the prior art, and propose a kind of remote transmitting water meter M-BUS communication chip and single-chip microcomputer
Attachment structure.
The present invention solves it and technical problem is that and take techniques below scheme to realize:
A kind of remote transmitting water meter M-BUS communication chip and the attachment structure of single-chip microcomputer, including single-chip microcomputer and the remote transmitting water meter of remote transmitting water meter
Communication chip, it is characterised in that: between the communication serial ports and the communication serial ports of communication chip of described single-chip microcomputer access isolation three
Pole pipe Q4.
And, the described base resistance R2 of isolation audion Q4 is connected with the TX_SW end of single-chip microcomputer, the collection of isolation audion Q4
Electrode is connected with the communication serial ports TXD of single-chip microcomputer, and the emitter stage of isolation audion Q4 is with the communication serial ports M RX of communication chip even
Connecing, meanwhile, emitter stage is connected with power supply MVDD by resistance R4.
Advantages of the present invention and good effect be:
The present invention is to avoid the crosstalk between M-BUS chip and microcontroller serial port communication, adds between two device talk serial ports
Isolation audion measure, improves systematic protection grade,
The present invention uses and directly transistor base resistance R2 is connected to single-chip microcomputer, when needs send data, is just set high by TX_SW,
Isolation audion Q4 conducting, starts to send data；When sending ED, after system delay 1s, then TX_SW is set low, cut off
Sendaisle.Adopting in this way, two equipment rooms, not only with signal quarantine measures, improve the safety of system, and thorough
The end, eliminates the idle current consumption of isolation audion Q4 base stage, extends the service life of battery.
Accompanying drawing explanation
Fig. 1 is the attachment structure of current M-BUS communication chip and single-chip microcomputer；
Fig. 2 is the structure chart of conventional isolation audion；
Fig. 3 is the attachment structure figure that the present invention isolates audion.
Detailed description of the invention
Implementing to be further described to the present invention below in conjunction with accompanying drawing, following example are illustrative, are not determinate,
Protection scope of the present invention can not be limited with this.
A kind of remote transmitting water meter M-BUS communication chip and the attachment structure of single-chip microcomputer, including single-chip microcomputer and the remote transmitting water meter of remote transmitting water meter
Communication chip, the innovative point of the present invention is, between the communication serial ports and the communication serial ports of communication chip of described single-chip microcomputer access
Isolation audion Q4.
In being embodied as of the present invention, as it is shown on figure 3, the TX_SW of the base resistance R2 of described isolation audion Q4 and single-chip microcomputer
End connect, isolation audion Q4 colelctor electrode is connected with the communication serial ports TXD of single-chip microcomputer, isolate audion Q4 emitter stage and
The communication serial ports M RX of communication chip connects, and emitter stage is connected with power supply MVDD by resistance R4 simultaneously.
Operation principle
Transistor base R2 resistance is directly connected to single-chip microcomputer by the present invention, when needs send data, is just set high by TX_SW,
Q4 turns on, and starts to send data；When sending ED, after system delay 1s, then TX_SW is set low, cut off to send and lead to
Road.Adopting in this way, two equipment rooms, not only with signal quarantine measures, improve the safety of system, and thoroughly eliminate
The idle current consumption of Q4 base stage, extends the service life of battery.
Claims (2)
1. remote transmitting water meter M-BUS communication chip and an attachment structure for single-chip microcomputer, including single-chip microcomputer and the teletransmission water of remote transmitting water meter
The communication chip of table, it is characterised in that: between the communication serial ports and the communication serial ports of communication chip of described single-chip microcomputer, access isolation
Audion Q4.
Remote transmitting water meter M-BUS communication chip the most according to claim 1 and the attachment structure of single-chip microcomputer, it is characterised in that:
The described base resistance R2 of isolation audion Q4 is connected with the TX_SW end of single-chip microcomputer, the colelctor electrode of isolation audion Q4 and monolithic
The communication serial ports TXD of machine connects, and the emitter stage of isolation audion Q4 is connected with the communication serial ports M RX of communication chip, meanwhile,
Emitter stage is connected with power supply MVDD by resistance R4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610575964.8A CN106023572A (en) | 2016-07-19 | 2016-07-19 | Remote water meter M-BUS communication chip and single-chip microcomputer connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610575964.8A CN106023572A (en) | 2016-07-19 | 2016-07-19 | Remote water meter M-BUS communication chip and single-chip microcomputer connection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106023572A true CN106023572A (en) | 2016-10-12 |
Family
ID=57116229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610575964.8A Pending CN106023572A (en) | 2016-07-19 | 2016-07-19 | Remote water meter M-BUS communication chip and single-chip microcomputer connection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106023572A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109360404A (en) * | 2018-12-13 | 2019-02-19 | 湖南常德牌水表制造有限公司 | A kind of M-Bus main website multi-channel intelligent meter reading remote transmission device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202582631U (en) * | 2012-04-18 | 2012-12-05 | 湖南威铭能源科技有限公司 | Circuit of remote sensing (RS) 485 remote-transmitting water meter |
| CN203311626U (en) * | 2013-07-10 | 2013-11-27 | 北京旭日金鼎科技有限公司 | MBUS physical layer communication channel of photoelectric direct-reading type remote intelligent water meter |
| CN205142206U (en) * | 2015-11-25 | 2016-04-06 | 上海华宿电气股份有限公司 | Switch circuit of communication direction |
| CN205983819U (en) * | 2016-07-19 | 2017-02-22 | 天津市炳华节能技术有限公司 | Teletransmission water gauge M connection structure of BUS communication chip and singlechip |
-
2016
- 2016-07-19 CN CN201610575964.8A patent/CN106023572A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202582631U (en) * | 2012-04-18 | 2012-12-05 | 湖南威铭能源科技有限公司 | Circuit of remote sensing (RS) 485 remote-transmitting water meter |
| CN203311626U (en) * | 2013-07-10 | 2013-11-27 | 北京旭日金鼎科技有限公司 | MBUS physical layer communication channel of photoelectric direct-reading type remote intelligent water meter |
| CN205142206U (en) * | 2015-11-25 | 2016-04-06 | 上海华宿电气股份有限公司 | Switch circuit of communication direction |
| CN205983819U (en) * | 2016-07-19 | 2017-02-22 | 天津市炳华节能技术有限公司 | Teletransmission water gauge M connection structure of BUS communication chip and singlechip |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109360404A (en) * | 2018-12-13 | 2019-02-19 | 湖南常德牌水表制造有限公司 | A kind of M-Bus main website multi-channel intelligent meter reading remote transmission device and method |
| CN109360404B (en) * | 2018-12-13 | 2023-08-15 | 湖南常德牌水表制造有限公司 | Multichannel intelligent meter reading remote transmission device and method for M-Bus master station |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161012 |