CN204258749U - Based on the M-Bus main website circuit of threshold adaptive - Google Patents
Based on the M-Bus main website circuit of threshold adaptive Download PDFInfo
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- CN204258749U CN204258749U CN201420793420.5U CN201420793420U CN204258749U CN 204258749 U CN204258749 U CN 204258749U CN 201420793420 U CN201420793420 U CN 201420793420U CN 204258749 U CN204258749 U CN 204258749U
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- 230000006872 improvement Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model discloses the M-Bus main website circuit based on threshold adaptive; comprise AC/DC power supply, M-Bus main website transtation mission circuit, current foldback circuit and M-bus interface; it is characterized in that: described AC/DC power supply connects the M-Bus main website receiving circuit based on threshold adaptive simultaneously; M-Bus main website receiving circuit based on threshold adaptive is also connected with M-bus interface simultaneously; current foldback circuit access is based on the M-Bus main website receiving circuit of threshold adaptive, and the transtation mission circuit access of M-Bus main website is based on the M-Bus main website receiving circuit of threshold adaptive.This M-Bus main website circuit, owing to being provided with computing circuit on receiving circuit, when main website load variations, can very fast stable reference thresholding, by raising the mode of thresholding, interference signal is kept away and removes, thus solve and on-the-spot to differ due to load, the problem of data acquisition instability in the longer situation that connects up.
Description
Technical field
The utility model relates to the improvement of a kind of Mbus main website circuit, belongs to communication technical field, specifically a kind of M-Bus main website circuit based on threshold adaptive.
Background technology
M-Bus is a kind of special data/address bus transmitting information for consuming measuring instrument sum counter, has the advantages that long distance transmits, can adapt to the yo-yo fluctuation of line voltage, be used widely at heat metering and data collecting field thereof at present.Along with the popularization that national heat metering is reformed, reliability and the promptness of heat metering and data acquisition thereof more and more get more and more people's extensive concerning.Heat metering, control instrument are generally adopt Mbus interface, and the reliability of M-Bus main website circuit and stability are just particularly important.Current M-Bus communications reception all adopts the mode of voltage compare to realize, its M-Bus main website circuit, comprise AC/DC power supply, M-Bus main website transtation mission circuit, M-Bus main website receiving circuit, current foldback circuit and M-Bus interface, M-Bus main website transtation mission circuit, M-Bus main website receiving circuit are all connected with AC/DC power supply with current foldback circuit, are connected with M-Bus interface simultaneously; Described M-Bus main website receiving circuit, M-Bus+ input comparator inverting input provides a reference voltage, the anode of the signal waveform input comparator of sampling, with reference voltage comparison of wave shape, thus draws parse error and loses pulse; Input power is nursed one's health out+24V voltage and+42V power supply by power module by described AC/DC power supply respectively, as the positive and negative logic that M-Bus sends; By from relatively or electric capacity realize the reception of data every straight mode of amplifying.The deficiency of this M-Bus main website circuit is: because M-Bus main website receiving circuit is when load changes, automatically inherent parameters can not be adjusted, the threshold voltage that automatic adjustment adapts to, so, when running into load and changing, the poor stability of communication, bus interference signal can not filtering; Due to the coupling capacitance effect between different loads, wiring, directly affects the adaptability of the different baud rate of capacitance and load.
Summary of the invention
The purpose of this utility model is to provide one can according to when different loads, and M-Bus main website can adjust inherent parameters automatically, thus improves the stability of communication, simultaneously again can the M-Bus main website circuit based on threshold adaptive of filtering bus interference signal.
In order to reach above object, the technical scheme that the utility model adopts is: should based on the M-Bus main website circuit of threshold adaptive, comprise AC/DC power supply, M-Bus main website transtation mission circuit, current foldback circuit and M-bus interface, M-Bus main website transtation mission circuit is all connected with AC/DC power supply with current foldback circuit, be connected with M-bus interface simultaneously, it is characterized in that: described AC/DC power supply connects the M-Bus main website receiving circuit based on threshold adaptive simultaneously, M-Bus main website receiving circuit based on threshold adaptive is also connected with M-bus interface simultaneously, current foldback circuit access is based on the M-Bus main website receiving circuit of threshold adaptive, the transtation mission circuit access of M-Bus main website is based on the M-Bus main website receiving circuit of threshold adaptive, the described M-Bus main website receiving circuit based on threshold adaptive comprises sampling resistor R1, voltage follower circuit, threshold voltage circuit, adder circuit and comparator circuit, described voltage follower circuit is made up of inductance L 1, electric capacity C1 and the first operational amplifier U1, one end parallel connection of inductance L 1, electric capacity C1 accesses the negative input end of the first operational amplifier U1 afterwards, ground connection after the other end of electric capacity C1 is in parallel with one end of sampling resistor R1, the transmission holding wire of M-Bus main website transtation mission circuit is connected to after the other end of inductance L 1 is in parallel with the other end of sampling resistor R1, thus after realizing the voltage stabilization on sampling resistor R1, input the negative input end of the first operational amplifier U1, described threshold voltage circuit is made up of resistance R2, resistance R3 and the second operational amplifier U2, wherein resistance R2 accesses the negative input end of the second operational amplifier U2 after being connected with one end of resistance R3, the other end of resistance R2 is connected with AC/DC power supply, the other end ground connection of resistance R3, described adder circuit comprises the 3rd operational amplifier U3 and resistance R6, resistance R7, the negative input end of the 3rd operational amplifier U3 is connected respectively by the output of the first operational amplifier U1 in the output of resistance R5 and resistance R4 and the second operational amplifier U2 in threshold voltage circuit and voltage follower circuit, realize thresholding by adder circuit automatically to adjust, thus provide reliable, stable reference voltage for level during communication changes, and then improve the stability of M-Bus main website collection, described comparator circuit is by four-operational amplifier U4, resistance R8, resistance R9 and triode Q1 forms, the positive input terminal of four-operational amplifier U4 is connected with the output of the 3rd operational amplifier U3 in adder circuit, the negative input end of four-operational amplifier U4 connects transmission holding wire, and connected the negative input end of the first operational amplifier U1 in voltage follower circuit by inductance L 1 simultaneously, by resistance R1 ground connection and meet electric capacity C1, the output of four-operational amplifier U4 accesses triode Q1 base stage by resistance R8, the grounded emitter of triode Q1, triode Q1 collector electrode connects AC/DC power supply by resistance R9, the level change realized when M-Bus main website sends by triode Q1 is controlled, connected with adder circuit, comparator circuit by voltage follower circuit and threshold voltage circuit, realize M-Bus main website incoming level and control.
The utility model is also implemented by following measure: the positive input terminal of the first operational amplifier U1 in described voltage follower circuit is connected with its output by wire; The positive input terminal of the second operational amplifier U2 in described threshold voltage circuit is connected with its output by wire; The positive input terminal of the 3rd operational amplifier U3 in described adder circuit connects its output by resistance R6, simultaneously by resistance R7 ground connection.
The beneficial effects of the utility model are: should based on the M-Bus main website circuit of threshold adaptive, owing to being provided with computing circuit on receiving circuit, when main website load variations, can very fast stable reference thresholding, and by raising the mode of thresholding, effectively interference signal is kept away and remove, thus solve and on-the-spot to differ due to load, the problem of data acquisition instability in the longer situation that connects up.Improve load capacity simultaneously, reduce collecting device cost of distribution.
Accompanying drawing explanation
Fig. 1 is structure schematic front view of the present utility model.
Fig. 2 is the M-Bus main website receiving circuit principle schematic based on threshold adaptive of the present utility model.
In figure: 1, AC/DC power supply; 2, M-Bus main website transtation mission circuit; 3, current foldback circuit; 4, M-bus interface; 5, based on the M-Bus main website receiving circuit of threshold adaptive; 51, voltage follower circuit; 52, threshold voltage circuit; 53, adder circuit; 54, comparator circuit.
Embodiment
The utility model is made with reference to Fig. 1, Fig. 2.Should based on the M-Bus main website circuit of threshold adaptive, comprise AC/DC power supply 1, M-Bus main website transtation mission circuit 2, current foldback circuit 3 and M-bus interface 4, M-Bus main website transtation mission circuit 2 is all connected with AC/DC power supply 1 with current foldback circuit 3, be connected with M-bus interface 4 simultaneously, it is characterized in that: described AC/DC power supply 1 connects the M-Bus main website receiving circuit 5 based on threshold adaptive simultaneously, M-Bus main website receiving circuit 5 based on threshold adaptive is also connected with M-bus interface 4 simultaneously, current foldback circuit 3 accesses the M-Bus main website receiving circuit 5 based on threshold adaptive, M-Bus main website transtation mission circuit 2 accesses the M-Bus main website receiving circuit 5 based on threshold adaptive, the described M-Bus main website receiving circuit 5 based on threshold adaptive comprises sampling resistor R1, voltage follower circuit 51, threshold voltage circuit 52, adder circuit 53 and comparator circuit 54, described voltage follower circuit 51 is made up of inductance L 1, electric capacity C1 and the first operational amplifier U1, one end parallel connection of inductance L 1, electric capacity C1 accesses the negative input end of the first operational amplifier U1 afterwards, ground connection after the other end of electric capacity C1 is in parallel with one end of sampling resistor R1, the transmission holding wire of M-Bus main website transtation mission circuit 2 is connected to after the other end of inductance L 1 is in parallel with the other end of sampling resistor R1, thus after realizing the voltage stabilization on sampling resistor R1, input the negative input end of the first operational amplifier U1, described threshold voltage circuit 52 is made up of resistance R2, resistance R3 and the second operational amplifier U2, wherein resistance R2 accesses the negative input end of the second operational amplifier U2 after being connected with one end of resistance R3, the other end of resistance R2 is connected with AC/DC power supply 1, the other end ground connection of resistance R3, described adder circuit 53 comprises the 3rd operational amplifier U3 and resistance R6, resistance R7, the negative input end of the 3rd operational amplifier U3 is connected respectively by the output of the first operational amplifier U1 in the output of resistance R5 and resistance R4 and the second operational amplifier U2 in threshold voltage circuit 52 and voltage follower circuit 51, realize thresholding by adder circuit 53 automatically to adjust, thus provide reliable, stable reference voltage for level during communication changes, and then improve the stability of M-Bus main website collection, described comparator circuit 54 is by four-operational amplifier U4, resistance R8, resistance R9 and triode Q1 forms, the positive input terminal of four-operational amplifier U4 is connected with the output of the 3rd operational amplifier U3 in adder circuit 53, the negative input end of four-operational amplifier U4 connects transmission holding wire, and connected the negative input end of the first operational amplifier U1 in voltage follower circuit 51 by inductance L 1 simultaneously, by resistance R1 ground connection and meet electric capacity C1, the output of four-operational amplifier U4 accesses triode Q1 base stage by resistance R8, the grounded emitter of triode Q1, triode Q1 collector electrode connects AC/DC power supply 1 by resistance R9, the level change realized when M-Bus main website sends by triode Q1 is controlled, connected with adder circuit 53, comparator circuit 54 by voltage follower circuit 51 and threshold voltage circuit 52, realize M-Bus main website incoming level and control.
As improvement of the present utility model: the positive input terminal of the first operational amplifier U1 in described voltage follower circuit 51 is connected with its output by wire; The positive input terminal of the second operational amplifier U2 in described threshold voltage circuit 52 is connected with its output by wire; The positive input terminal of the 3rd operational amplifier U3 in described adder circuit 53 connects its output by resistance R6, simultaneously by resistance R7 ground connection.
Should be based on the operation principle of the M-Bus main website circuit of threshold adaptive: the signal that M-Bus main website transtation mission circuit 2 sends, through sampling resistor R1, again after inductance L 1, electric capacity C1, be input in the first operational amplifier U1 in voltage follower circuit 51, thus waited until stable sampled reference signal; Obtained the adjusted value of threshold voltage by the resistance R2 in threshold voltage circuit 52, resistance R3 and the second operational amplifier U2, realized the automatic adjustment of threshold voltage by adder circuit 53; Effective TTL communication receive signals is drawn by comparator circuit 54, thus the automatic adjustment of reference level under realizing different loads.
Claims (2)
1. based on the M-Bus main website circuit of threshold adaptive, comprise AC/DC power supply (1), M-Bus main website transtation mission circuit (2), current foldback circuit (3) and M-bus interface (4), M-Bus main website transtation mission circuit (2) is all connected with AC/DC power supply (1) with current foldback circuit (3), be connected with M-bus interface (4) simultaneously, it is characterized in that: described AC/DC power supply (1) connects M-Bus main website receiving circuit (5) based on threshold adaptive simultaneously, M-Bus main website receiving circuit (5) based on threshold adaptive is also connected with M-bus interface (4) simultaneously, current foldback circuit (3) access is based on M-Bus main website receiving circuit (5) of threshold adaptive, M-Bus main website transtation mission circuit (2) access is based on M-Bus main website receiving circuit (5) of threshold adaptive, described M-Bus main website receiving circuit (5) based on threshold adaptive comprises sampling resistor R1, voltage follower circuit (51), threshold voltage circuit (52), adder circuit (53) and comparator circuit (54), described voltage follower circuit (51) is made up of inductance L 1, electric capacity C1 and the first operational amplifier U1, one end parallel connection of inductance L 1, electric capacity C1 accesses the negative input end of the first operational amplifier U1 afterwards, ground connection after the other end of electric capacity C1 is in parallel with one end of sampling resistor R1, is connected to the transmission holding wire of M-Bus main website transtation mission circuit (2) after the other end of inductance L 1 is in parallel with the other end of sampling resistor R1, described threshold voltage circuit (52) is made up of resistance R2, resistance R3 and the second operational amplifier U2, wherein resistance R2 accesses the negative input end of the second operational amplifier U2 after being connected with one end of resistance R3, the other end of resistance R2 is connected with AC/DC power supply (1), the other end ground connection of resistance R3, described adder circuit (53) comprises the 3rd operational amplifier U3 and resistance R6, resistance R7, and the negative input end of the 3rd operational amplifier U3 is connected respectively by the output of the first operational amplifier U1 in the output of resistance R5 and resistance R4 and the second operational amplifier U2 in threshold voltage circuit (52) and voltage follower circuit (51), described comparator circuit (54) is by four-operational amplifier U4, resistance R8, resistance R9 and triode Q1 forms, the positive input terminal of four-operational amplifier U4 is connected with the output of the 3rd operational amplifier U3 in adder circuit (53), the negative input end of four-operational amplifier U4 connects transmission holding wire, and connected the negative input end of the first operational amplifier U1 in voltage follower circuit (51) by inductance L 1 simultaneously, by resistance R1 ground connection and meet electric capacity C1, the output of four-operational amplifier U4 accesses triode Q1 base stage by resistance R8, the grounded emitter of triode Q1, triode Q1 collector electrode connects AC/DC power supply (1) by resistance R9.
2. the M-Bus main website circuit based on threshold adaptive according to claim 1, is characterized in that: the positive input terminal of the first operational amplifier U1 in described voltage follower circuit (51) is connected with its output by wire; The positive input terminal of the second operational amplifier U2 in described threshold voltage circuit (52) is connected with its output by wire; The positive input terminal of the 3rd operational amplifier U3 in described adder circuit (53) connects its output by resistance R6, simultaneously by resistance R7 ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420793420.5U CN204258749U (en) | 2014-12-16 | 2014-12-16 | Based on the M-Bus main website circuit of threshold adaptive |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420793420.5U CN204258749U (en) | 2014-12-16 | 2014-12-16 | Based on the M-Bus main website circuit of threshold adaptive |
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| CN204258749U true CN204258749U (en) | 2015-04-08 |
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| CN201420793420.5U Expired - Fee Related CN204258749U (en) | 2014-12-16 | 2014-12-16 | Based on the M-Bus main website circuit of threshold adaptive |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106803340A (en) * | 2017-02-28 | 2017-06-06 | 威胜集团有限公司 | MBUS telecommunication circuits, communication means and its measuring instrument being made |
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2014
- 2014-12-16 CN CN201420793420.5U patent/CN204258749U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106803340A (en) * | 2017-02-28 | 2017-06-06 | 威胜集团有限公司 | MBUS telecommunication circuits, communication means and its measuring instrument being made |
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Address after: 271199 No. 009 Fenghuang Road, hi tech Zone, Shandong, Laiwu Patentee after: SHANDONG LICHUANG TECHNOLOGY CO.,LTD. Address before: 271199 No. 009 Fenghuang Road, hi tech Zone, Shandong, Laiwu Patentee before: SHANDONG LICHUANG SCIENCE AND TECHNOLOGY Co.,Ltd. |
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Granted publication date: 20150408 |