CN202352060U - Active 485 meter reading circuit for concentrator - Google Patents
Active 485 meter reading circuit for concentrator Download PDFInfo
- Publication number
- CN202352060U CN202352060U CN 201120508190 CN201120508190U CN202352060U CN 202352060 U CN202352060 U CN 202352060U CN 201120508190 CN201120508190 CN 201120508190 CN 201120508190 U CN201120508190 U CN 201120508190U CN 202352060 U CN202352060 U CN 202352060U
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- incoming line
- circuit
- concentrator
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- power supply
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Abstract
The utility model discloses an active 485 meter reading circuit for a concentrator, and the active 485 meter reading circuit comprises a power supply incoming line and a signal incoming line, wherein the power supply incoming line and the signal incoming line have the same circuit structure, the power supply incoming line and the signal incoming line are respectively divided into a plurality of power supply outgoing lines and a plurality of signal outgoing lines by virtue of an interlocking circuit and a plurality of selector switches, the interlocking circuit is connected with the plurality of selector switches, and a control line of the interlocking circuit is controlled by a CPU (central processing unit) to respectively and alternately turn on each selector switch at different sections and times. According to the active 485 meter reading circuit for the concentrator, a plurality of meters can be managed at different sections and times, due to the work in a switching way at different times, the power supply load supply can be reduced, the self heat productivity can be reduced, the energy sources can be saved, the fault occurrence rate can be reduced, and the load capability of communication signals can be increased. Therefore, not only can the problem of load in the prior art be solved, but also the problems of heating and power consumption in the prior art can be further solved.
Description
Technical field
The utility model relates to a kind of active 485 of concentrator circuit of checking meter that is used for.
Background technology
In low-voltage collecting meter reading system, concentrator connects collection control center on being, lower accepting water, gas, ammeter etc. play the effect of a data transfer.Especially in hydroscope, except that communication, also will power supply be provided to it, electric current is bigger at most if table is haggled over, and not only requires the power of concentrator to want the big thermal value that has also increased concentrator, takes place if the permanent load meeting has influence on the life-span and the accident of concentrator.
The utility model content
The purpose of the utility model is to provide a kind of can prevent that concentrator can provide minimum power under the situation of multilist meter, and the life-span can affectedly not be used for active 485 of the concentrator circuit of checking meter.
The utility model provides this active 485 of the concentrator circuit of checking meter that is used for; Comprise one road electric power incoming line and one road signal inlet wire; Said electric power incoming line has identical circuit structure with the signal inlet wire; Through an interlock circuit and multi-channel switch said electric power incoming line and signal inlet wire are divided into several power outlet and the outlet of several signal respectively respectively; Interlock circuit is connected with multi-channel switch, the control line CPU control of interlock circuit, and each road in the said multi-channel switch is opened in the segmentation timesharing in turn respectively.
Said multi-channel switch position is four tunnel change-over switch positions.Said interlock circuit mainly is made up of chip 74HC126.
The utility model is owing to can be divided into some power outlets and signal outlet with one road electric power incoming line and one road signal inlet wire; And time sharing segment is connected, and therefore can carry out the time sharing segment management to the multilist meter, and the switching time-sharing work can alleviate the power supply load and supply with; Reduce the self-heating amount; Energy savings reduces rate of breakdown, and the signal of communication load capacity increases.Not only solve loading problem of the prior art but also solved heating and power problems.
Description of drawings
Fig. 1 is the structured flowchart of the utility model.
Fig. 2 is the circuit diagram of the utility model.
Embodiment
Can find out that from Fig. 1 and Fig. 2 this is the embodiment that the utility model is managed according to four period his-and-hers watches meters.
Left side electric power incoming line is shown Fig. 1 and the signal inlet wire all is one the tunnel, all becomes four the tunnel through multi-channel switch power outlet and signal outlet, and many shunt control circuit of power lead and signal wire is just the same.Many shunt control circuit with power lead is that example describes below: the multi-channel switch front has interlock circuit that interlocking is carried out in four tunnel unlatchings of multi-channel switch; Guarantee to have only at one time one the tunnel to be communicated with electric power incoming line; Prevent that the multichannel conducting from causing electric power system to be burnt, four road control lines of interlock circuit are controlled by CPU.Fig. 2 shows the detailed circuit of this structure.As can beappreciated from fig. 2 control line 1～4 is by CPU control, and input low level is effective.Interlock circuit mainly is four buffer/line driver (D5A, D5B, D5C, D5D) 74HC126 acp chips; This chip has 3 attitude gate control pin OE; When controlling OE for low level, can cut off control and carry out, controlling outlet simultaneously is high-impedance state, has protected multichannel conducting simultaneously that the overload phenomenon takes place.Multi-channel switch mainly is made up of diode (V8-V19).With control line 1 is example, and the OE pin during operate as normal among four buffer/line driver D5A, D5B, D5C, the D5D is a high level, guarantees the unimpeded of inlet wire and outlet; This moment, inlet wire and outlet level all were high; When control line 1 became low level, the 3rd pin output low level of D5A drove the diode V8 V9 V10 forward conduction on D5A 3 pin; Causing the OE among the D5B D5C D5D is low level; Ended the output pin of these three devices and all be high-impedance state, so owing to have pull-up resistor R2 R3 R4 output still to be high level, but have only D5A operate as normal output low level.Circuit can restPose after the D5A inlet wire is high level.Control line 2,3,4 principles are identical with inlet wire 1.
Circuit shown in Fig. 2 is suitable for the control of signal inlet wire and outlet equally, and many shunt control circuit of signal wire and power lead is just the same.
The application example of the utility model:
In the low pressure kilowatt meter reading-out system, concentrator also needs concentrator to provide power supply to water meter when communicating by letter with water meter RS485, guarantee water meter the proper communication function.The corresponding increase of power and the traffic load ability that increase concentrator and provide along with the quantity of water meter under the concentrator will be restricted, and adopt the utility model to supply with the water meter power supply by time sharing segment, guarantee the total system operate as normal, also can reduce the power consumption of concentrator.Such as under concentrator, being connected with 128 water meters, 128 water meters need provide the electric current of 20mA * 128=2.5A, and wherein 20mA is the electric current of monolithic table, under the situation of prior art, will provide the electric current more than the 2.5A just can make system's operate as normal so.Utilize the utility model circuit to be equally divided into 4 five equilibriums to whole circuit; Make its time-sharing work, we only need provide the electric current of 0.8A just passable so, thereby reduce the power of concentrator greatly; Reduce the generation of thermal value, make the reliable and stable permanent operation of this equipment of concentrator.The number that in communication, connects on RS485 bus amount usually is 32, promptly connects 32 water meters, switches through circuit, is divided into four the tunnel by one the tunnel, has then increased by 4 times quantity, becomes and has reduced the quantity of host side, has practiced thrift cost.
Claims (3)
1. one kind is used for active 485 of the concentrator circuit of checking meter; Comprise one road electric power incoming line and one road signal inlet wire; It is characterized in that said electric power incoming line has identical circuit structure with the signal inlet wire; Through an interlock circuit and multi-channel switch said electric power incoming line and signal inlet wire are divided into several power outlet and the outlet of several signal respectively respectively, interlock circuit is connected with multi-channel switch and by CPU control, each road in the said multi-channel switch is opened in the segmentation timesharing in turn respectively.
2. active 485 of the concentrator circuit of checking meter that is used for according to claim 1 is characterized in that said multi-channel switch position is four tunnel change-over switch positions.
3. active 485 of the concentrator circuit of checking meter that is used for according to claim 1 and 2 is characterized in that said interlock circuit mainly is made up of chip 74HC126.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120508190 CN202352060U (en) | 2011-12-08 | 2011-12-08 | Active 485 meter reading circuit for concentrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120508190 CN202352060U (en) | 2011-12-08 | 2011-12-08 | Active 485 meter reading circuit for concentrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202352060U true CN202352060U (en) | 2012-07-25 |
Family
ID=46541046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120508190 Expired - Lifetime CN202352060U (en) | 2011-12-08 | 2011-12-08 | Active 485 meter reading circuit for concentrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202352060U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325085A (en) * | 2021-12-30 | 2022-04-12 | 江苏林洋能源股份有限公司 | Electric energy meter and method supporting dynamic energy consumption management |
| CN116184909A (en) * | 2023-03-15 | 2023-05-30 | 武汉盛帆电子股份有限公司 | Multichannel analog quantity acquisition electric power concentrator |
-
2011
- 2011-12-08 CN CN 201120508190 patent/CN202352060U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325085A (en) * | 2021-12-30 | 2022-04-12 | 江苏林洋能源股份有限公司 | Electric energy meter and method supporting dynamic energy consumption management |
| CN116184909A (en) * | 2023-03-15 | 2023-05-30 | 武汉盛帆电子股份有限公司 | Multichannel analog quantity acquisition electric power concentrator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 410205 No. 468 west slope, Changsha hi tech Industrial Development Zone, Changsha, Hunan, Yuelu District, Tongzi Patentee after: WILLFAR INFORMATION TECHNOLOGY Co.,Ltd. Address before: 410205 No. 468 west slope, Changsha hi tech Industrial Development Zone, Changsha, Hunan, Yuelu District, Tongzi Patentee before: HUNAN WEISHENG INFORMATION TECHNOLOGY CO.,LTD. Address after: 410205 No. 468 west slope, Changsha hi tech Industrial Development Zone, Changsha, Hunan, Yuelu District, Tongzi Patentee after: HUNAN WEISHENG INFORMATION TECHNOLOGY CO.,LTD. Address before: 410205 No. 468 west slope, Changsha hi tech Industrial Development Zone, Changsha, Hunan, Yuelu District, Tongzi Patentee before: CHANGSHA WASION INFORMATION TECHNOLOGY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120725 |
|
| CX01 | Expiry of patent term |