CN110246322A - A kind of MBUS water meter collection copies switching circuit - Google Patents
A kind of MBUS water meter collection copies switching circuit Download PDFInfo
- Publication number
- CN110246322A CN110246322A CN201910423896.7A CN201910423896A CN110246322A CN 110246322 A CN110246322 A CN 110246322A CN 201910423896 A CN201910423896 A CN 201910423896A CN 110246322 A CN110246322 A CN 110246322A
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- relay
- switching circuit
- optocoupler
- meter reading
- circuit module
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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
A kind of MBUS water meter collection proposed by the present invention copies switching circuit, comprising: relay, relay switching circuit module, monitoring circuit module and master cpu；Master cpu is used to generate relay switching control when getting meter reading switching command and monitoring circuit module detects that water utilities meter reading terminal stops meter reading and instruct and be handed down to relay switching circuit module.Relay switching circuit module is used to instruct the switching of control relay working condition according to relay switching control.In the present invention, only when water utilities meter reading terminal stops meter reading, relay switching is just controlled, the data-crosstalk of water utilities meter reading terminal and electric meter reading terminal is absolutely avoided, guarantees not interfereing with each other for data transmission, meets acquisition of each department to data.
Description
Technical field
Technical field is copied the present invention relates to water power net multiple-in-one collection more particularly to a kind of MBUS water meter collection copies switching electricity
Road.
Background technique
During daily water supply company's remote collection, intelligent telemetering water meter generallys use M-BUS (long-distance meter-reading system)
Communication mode；With the water meter of every unit building for a bus, the data transmitted in bus are exactly the water that resident is consumed
The significant datas such as amount.Water utilities company builds a remote collection terminal in each building, can be adopted daily by remote collection terminal
Collect the data of water meter of resident.During national grid multiple-in-one pilot, power grid is also required to install additional in bus end a set of remote
Journey acquisition terminal acquires data of water meter, the case where leading to two acquisition terminals of a data bus and deposit.M-BUS communication is with electricity
Stream is that carrier is communicated, and in the case where water utilities company and power supply company's meter reading simultaneously, the speed that will lead to data acquisition becomes
Slowly, the inaccuracy of data acquisition is it could even be possible to damage M-BUS intellectual water meter.Present way is by the acquisition terminal of power grid
It installs hardware switching switch additional, drives relay to achieve the purpose that isolation by M-BUS communication bus, but such isolation method
Effect is undesirable in use at the scene, and will lead to water utilities meter reading terminal meter reading reduces at rate, and reason is the driving of relay
It is communicated by M-BUS, the driving of the failing edge effect of signals relay of communication reduces the success rate of meter reading.
Summary of the invention
Technical problems based on background technology, the invention proposes a kind of MBUS water meter collection to copy switching circuit.
A kind of MBUS water meter collection proposed by the present invention copies switching circuit, comprising: relay, relay switching circuit module,
Monitor circuit module and master cpu；
The common end of relay is used to connect water utilities meter reading terminal for connecting water meter bus, the normal-closed end of relay, after
The normally open end of electric appliance is for connecting electric meter reading terminal；
Relay switching circuit module is connect with relay, and relay switching circuit module is equipped with switching signal input terminal,
For connecting master cpu to obtain the relay switching control instruction that master cpu issues, relay switching circuit module is used for root
The switching of control relay working condition is instructed according to relay switching control；
It monitors circuit module and is equipped with signal input part, and the normal-closed end of signal input part connection relay is for obtaining water utilities
The meter reading signal of meter reading terminal；Monitoring circuit module is additionally provided with monitoring signal output end for connecting master cpu；
Master cpu be used for get meter reading switching command and monitoring circuit module detect water utilities meter reading terminal stopping copy
When table, generates relay switching control and instruct and be handed down to relay switching circuit module.
Preferably, relay switching circuit module includes: the 8th resistance, the second optocoupler, the 9th resistance, the tenth resistance, three
Pole pipe, first diode, the second diode, third capacitor and eleventh resistor；Triode uses NPN type triode；
The cathode of second optocoupler luminous end is as switching signal input terminal；The anode of second optocoupler luminous end is for connecting the
One DC power supply terminal simultaneously connects switching signal input terminal for passing through the 8th resistance；The collector of second optocoupler light-receiving end is for connecting
Third DC power supply terminal is connect, the emitter of the second optocoupler light-receiving end passes through the 9th resistance connecting triode base stage and passes through the tenth electricity
Resistance ground connection；
The collector of triode connects the anode of the second diode and connects the control terminal cathode of relay；The hair of triode
Emitter grounding；The control terminal anode of the cathode connection relay of second diode simultaneously connects first diode by eleventh resistor
Cathode；The anode of first diode is for connecting the 4th DC power supply terminal and passing through third capacity earth.
Preferably, for the first DC power supply terminal for accessing 3.3V direct current, third DC power supply terminal is straight for accessing 2.5V
Galvanic electricity, the 4th DC power supply terminal pass through the 7th resistance connection first for accessing 12V DC electricity, the anode of the second optocoupler luminous end
DC power supply terminal.
Preferably, relay uses FD3-V/12 relay.
Preferably, triode uses MMBT2222A.
Preferably, monitoring circuit module includes processor, first capacitor, the second capacitor, 3rd resistor, the 4th resistance and the
One optocoupler, signal input part are connect with processor；
The end STC of processor connect with first capacitor anode and should be in connecting the second DC power supply terminal, first capacitor cathode
Ground connection；The end RS, the end SC and the end RIDD of processor pass through 3rd resistor, the second capacitor and the 4th resistance eutral grounding respectively；
The end TX of processor connects the cathode of the first optocoupler luminous end, anode the second direct current of connection of the first optocoupler luminous end
Feeder ear；The collector of first optocoupler light-receiving end connects the first DC power supply terminal and as monitoring signal output end；First optocoupler
The emitter of light-receiving end is grounded.
Preferably, relay normal-closed end is connected by the 5th resistance as the pin of signal input part anode on processor
Anode connects the cathode of relay normal-closed end on processor as the pin of signal input part cathode by the 5th resistance.
It preferably, further include TVS pipe, TVS pipe is connected between the positive and negative anodes of relay normal-closed end.
Preferably, the anode of the first optocoupler luminous end by second resistance connect the second DC power supply terminal, the first optocoupler by
The collector at light end connects the first DC power supply terminal by first resistor.
Preferably, the first optocoupler and the second optocoupler are all made of LTV-816S-TA1-D3-TX.
A kind of MBUS water meter collection proposed by the present invention copies switching circuit, and master cpu combination meter reading switching command and water utilities are copied
The meter reading state optimization meter reading algorithm and meter reading logic of meter terminal realize electricity meter-reading and water by controlling the folding of relay
The switching of business meter reading.In this way, first verifying that whether water utilities meter reading terminal stops copying when electric meter reading terminal needs to carry out meter reading
Table just controls relay switching, water utilities meter reading terminal is absolutely avoided and electric power is copied only when water utilities meter reading terminal stops meter reading
The data-crosstalk of meter terminal guarantees not interfereing with each other for data transmission, meets acquisition of each department to data.
The present invention can effectively improve the success rate of electric meter reading terminal meter reading, avoid interfering with each other for data, can be effective
Protection water meter, extend the water meter service life.
Detailed description of the invention
Fig. 1 is that a kind of MBUS water meter collection proposed by the present invention copies switching circuit module map；
Fig. 2 is relay switching circuit module hardware schematic diagram in Fig. 1；
Fig. 3 is that circuit module hardware elementary diagram is monitored in Fig. 1.
Specific embodiment
Referring to Fig.1, a kind of MBUS water meter collection proposed by the present invention copies switching circuit, comprising: relay U2, relay switching
Circuit module, monitoring circuit module and master cpu.
For connecting water meter bus, the normal-closed end of relay U2 is whole for connecting water utilities meter reading for the common end of relay U2
End, the normally open end of relay U2 is for connecting electric meter reading terminal.Specifically, water meter bus is used for transmission its concatenated each water meter
Data of water meter；When the normal-closed end of relay U2 is communicated with common end, water utilities meter reading terminal carries out meter reading by water meter bus, obtains
Data of water meter is taken, realizes the remote meter reading of water utilities company；When the normally open end of relay U2 is communicated with common end, electric meter reading terminal
Meter reading is carried out by water meter bus and obtains data of water meter, realizes the remote meter reading of power supply company.
Specifically, in present embodiment, relay U2 using FD3-V/12 relay, 1 foot and 12 feet as control terminal,
Its 3 foot BUSL1 and 10 foot BUSL2 is as normal-closed end for connecting water utilities meter reading terminal, and 4 foot MB1 and 9 foot MA1 are as public
End is for connecting water meter bus；Its 5 foot M- and 8 foot M+ is as normally open end for connecting electric meter reading terminal.
Relay switching circuit module is connect with relay, and relay switching circuit module is equipped with switching signal input terminal,
For connecting master cpu to obtain the relay switching control instruction that master cpu issues, relay switching circuit module is used for root
According to relay switching control instruct control relay U2 working condition switching, i.e., relay switching circuit module be used for according to after
Electric appliance switching control instruction control relay U2 common end be connected with normal-closed end, or control relay common end with it is normally opened
End conducting.
Specifically, settable, normal-closed end is connected with common end under relay U2 normality in present embodiment, water utilities is realized
The meter reading of meter reading terminal；When master cpu issues relay switching control instruction, relay switching circuit module controls relay U2
Normally open end be connected with common end, realize the meter reading of electric meter reading terminal.
It monitors circuit module and is equipped with signal input part, and the normal-closed end of signal input part connection relay U2 is for obtaining water
The meter reading signal of business meter reading terminal, to realize monitoring of the monitoring circuit module for water utilities meter reading terminal meter reading state.Monitoring electricity
Road module is additionally provided with monitoring signal output end for connecting master cpu, so as to the meter reading to master cpu feedback water utilities meter reading terminal
State.
Master cpu be used for get meter reading switching command and monitoring circuit module detect water utilities meter reading terminal stopping copy
When table, generates relay switching control and instruct and be handed down to relay switching circuit module.
In this way, the meter reading state of master cpu combination meter reading switching command and water utilities meter reading terminal is excellent in present embodiment
Change meter reading algorithm and meter reading logic, by controlling the folding of relay, realizes the switching of electricity meter-reading and water utilities meter reading.Specifically
, the meter reading instruction that electric meter reading terminal is transmitted to master cpu can be used in meter reading switching command.
In this way, when electric meter reading terminal needs to carry out meter reading, first verifying that water utilities meter reading terminal is in present embodiment
No stopping meter reading just controlling relay switching, water utilities meter reading terminal is absolutely avoided only when water utilities meter reading terminal stops meter reading
With the data-crosstalk of electric meter reading terminal, guarantees not interfereing with each other for data transmission, meet acquisition of each department to data.
In present embodiment, relay switching circuit module include: the 8th resistance R8, the second optocoupler N2, the 9th resistance R9,
Tenth resistance R10, triode Q1, first diode D1, the second diode D2, third capacitor C3 and eleventh resistor R11.Three poles
Pipe Q1 uses NPN type triode, and MMBT2222A specifically can be used.
The cathode of second optocoupler N2 luminous end is as switching signal input terminal, for connecting master cpu to obtain master cpu
The relay switching control instruction issued.The anode of second optocoupler N2 luminous end is used in combination for connecting the first DC power supply terminal VCC1
In pass through the 8th resistance R8 connection switching signal input terminal.The collector of second optocoupler N2 light-receiving end is for connecting the confession of third direct current
Electric end VCC3, the emitter of the second optocoupler N2 light-receiving end pass through the 9th resistance R9 connecting triode Q1 base stage and pass through the tenth resistance
R10 ground connection.
The collector of triode Q1 connects the anode of the second diode D2 and connects the control terminal cathode of relay U2.Three poles
The emitter of pipe Q1 is grounded.The control terminal anode of the cathode connection relay U2 of second diode D2 simultaneously passes through eleventh resistor
The cathode of R11 connection first diode D1.The anode of first diode D1 is for connecting the 4th DC power supply terminal and passing through third
Capacitor C3 ground connection.
Specifically, in present embodiment, direct current that the four or two DC power supply terminal VCC4 is provided through first diode D1 and
Eleventh resistor R11 powers to the 1st foot of relay U2, so that the 1st foot of relay U2 realizes high level.Master cpu issue after
Electric appliance switching control command M TXDTROL is for controlling the second optocoupler N2 work.When second optocoupler N2 is connected, triode Q1 conducting,
To which the second diode D2 anode and relay U212 foot are grounded；When second optocoupler N2 ends, triode Q1 cut-off, the two or two pole
Pipe D2 is breakdown, so that the 12nd foot of relay U2 and the 1st foot realize high level simultaneously, to control relay U2 switch operating shape
State.
In this way, relay U2 the 12nd can be controlled by relay switching control command M TXDTROL in present embodiment
Foot level state, to control relay U2 working condition.Specifically, in present embodiment, it is settable, under normality, relay
U2 working condition is that normal-closed end is connected with common end, realizes water utilities meter reading terminal to water meter reading；When master cpu issues relay
Device switching control command M TXDTROL, then relay U2 working condition is switched to normally open end and is connected with common end, realizes that electric power is copied
Meter terminal realizes the meter reading test effect of multiple-in-one to water meter reading.
In present embodiment, by the cooperation of the second optocoupler N2 and triode Q1, relay switching circuit module is realized
It is reliable and stable, realize relay switching circuit module accumulation relay working condition switching efficient control, be conducive to protect
Demonstrate,prove the service life of relay switching circuit module and relay U2.And the relay in present embodiment is based on single-pole double throw
The working principle of switch can be effectively isolated water utilities meter reading terminal and electric meter reading terminal, prevent data-crosstalk.
Specifically, the first DC power supply terminal VCC1 is for accessing 3.3V direct current, third direct current supply in present embodiment
End VCC3 is for accessing 2.5V direct current, and the four or two DC power supply terminal VCC4 is for accessing 12V DC electricity.Second optocoupler N2 shines
The anode at end passes through the 7th resistance R7 the first DC power supply terminal of connection VCC1.
In present embodiment, monitoring circuit module includes processor U1, first capacitor C1, the second capacitor C2,3rd resistor
R3, the 4th resistance R4 and the first optocoupler N1, processor U1 is equipped with the signal input part for inputting water utilities meter reading signal, and believes
The normal-closed end of number input terminal connection relay U2 is used to obtain the meter reading signal of water utilities kilowatt meter reading-out system.
The end STC of processor U1 connect with first capacitor C1 anode and should in the second DC power supply terminal VCC2 of connection, first
Capacitor C1 cathode ground connection.The end RS, the end SC and the end RIDD of processor U1 passes through 3rd resistor R3, the second capacitor C2 and the 4th respectively
Resistance R4 ground connection.
The end TX of processor U1 connects the cathode of the first optocoupler N1 luminous end, the anode connection of the first optocoupler N1 luminous end the
Two DC power supply terminal VCC2.The collector of first optocoupler N1 light-receiving end connects the first DC power supply terminal and exports as monitoring signal
End is for connecting master cpu.The emitter of first optocoupler N1 light-receiving end is grounded.
Specifically, processor uses integrated chip, in present embodiment to realize the meter reading shape to water utilities meter reading terminal
The intelligent decision of state.In present embodiment, processor U1 corresponds to the judging result of the meter reading state of water utilities meter reading terminal by the
One optocoupler N1 is transferred to master cpu.In present embodiment, by the first optocoupler N1, realizes processor U1 and communicated with master cpu
It is safe and reliable with it is efficient.
Pass through the 5th resistance R5 connection relay U2 normal-closed end as the pin of signal input part anode on processor U1
Anode, on processor U1 as the pin of signal input part cathode bearing by the 5th resistance R5 connection relay U2 normal-closed end
Pole.In present embodiment, processor uses NCN5150, and the 1st pin and the 16th pin are as signal input part.
In present embodiment, monitoring circuit module further includes TVS pipe, and TVS pipe is connected on the positive and negative of relay U2 normal-closed end
Between pole, to realize signal isolation.
In present embodiment, the anode of the first optocoupler N1 luminous end passes through the second DC power supply terminal of second resistance R2 connection
The collector of VCC2, the first optocoupler N1 light-receiving end connect the first DC power supply terminal VCC1 by first resistor, to realize that current limliting is protected
Shield.Specifically, the first optocoupler N1 and the second optocoupler N2 are all made of LTV-816S-TA1-D3-TX.
The above, preferable specific embodiment only of the present invention, but protection scope of the present invention not office
Be limited to this, anyone skilled in the art in the technical scope disclosed by the present invention, technology according to the present invention
Scheme and its inventive concept are subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of MBUS water meter collection copies switching circuit characterized by comprising relay (U2), relay switching circuit module,
Monitor circuit module and master cpu；
For connecting water meter bus, the normal-closed end of relay (U2) is whole for connecting water utilities meter reading for the common end of relay (U2)
End, the normally open end of relay (U2) is for connecting electric meter reading terminal；
Relay switching circuit module is connect with relay, and relay switching circuit module is equipped with switching signal input terminal, is used for
Connection master cpu to obtain relay switching control that master cpu issues instruction, relay switching circuit module be used for according to after
The switching of electric appliance switching control instruction control relay (U2) working condition；
It monitors circuit module and is equipped with signal input part, and the normal-closed end of signal input part connection relay (U2) is for obtaining water utilities
The meter reading signal of meter reading terminal；Monitoring circuit module is additionally provided with monitoring signal output end for connecting master cpu；
Master cpu be used for get meter reading switching command and monitoring circuit module detect water utilities meter reading terminal stop meter reading
When, it generates relay switching control and instructs and be handed down to relay switching circuit module.
2. MBUS water meter collection as described in claim 1 copies switching circuit, which is characterized in that relay switching circuit module packet
It includes: the 8th resistance (R8), the second optocoupler (N2), the 9th resistance (R9), the tenth resistance (R10), triode (Q1), first diode
(D1), the second diode (D2), third capacitor (C3) and eleventh resistor (R11)；Triode (Q1) uses NPN type triode；
The cathode of the second optocoupler (N2) luminous end is as switching signal input terminal；The anode of the second optocoupler (N2) luminous end is for connecting
Connect the first DC power supply terminal (VCC1) and for connecting switching signal input terminal by the 8th resistance (R8)；Second optocoupler (N2) by
For the collector at light end for connecting third DC power supply terminal (VCC3), the emitter of the second optocoupler (N2) light-receiving end passes through the 9th electricity
It hinders (R9) connecting triode (Q1) base stage and is grounded by the tenth resistance (R10)；
The anode of the collector connection the second diode (D2) of triode (Q1) and the control terminal cathode for connecting relay (U2)；Three
The emitter of pole pipe (Q1) is grounded；The control terminal anode of cathode connection relay (U2) of second diode (D2) simultaneously passes through the tenth
One resistance (R11) connects the cathode of first diode (D1)；The anode of first diode (D1) is for connecting the 4th direct current supply
It holds and passes through third capacitor (C3) ground connection.
3. MBUS water meter collection as claimed in claim 2 copies switching circuit, which is characterized in that the first DC power supply terminal (VCC1) is used
In access 3.3V direct current, third DC power supply terminal (VCC3) is for accessing 2.5V direct current, the four or two DC power supply terminal
(VCC4) for accessing 12V DC electricity, the anode of the second optocoupler (N2) luminous end connects the first direct current by the 7th resistance (R7)
Feeder ear (VCC1).
4. MBUS water meter collection as claimed in claim 2 copies switching circuit, which is characterized in that relay (U2) uses FD3-V/12
Relay.
5. MBUS water meter collection as claimed in claim 2 copies switching circuit, which is characterized in that triode (Q1) uses
MMBT2222A。
6. MBUS water meter collection as described in claim 1 copies switching circuit, which is characterized in that monitoring circuit module includes processor
(U1), first capacitor (C1), the second capacitor (C2), 3rd resistor (R3), the 4th resistance (R4) and the first optocoupler (N1), signal are defeated
Enter end to connect with processor (U1)；
The end STC of processor (U1) and first capacitor (C1) anode connect and should in connecting the second DC power supply terminal (VCC2), the
One capacitor (C1) cathode ground connection；The end RS, the end SC and the end RIDD of processor (U1) pass through 3rd resistor (R3), the second capacitor respectively
(C2) it is grounded with the 4th resistance (R4)；
The cathode of the end TX connection the first optocoupler (N1) luminous end of processor (U1), the anode connection of the first optocoupler (N1) luminous end
Second DC power supply terminal (VCC2)；The collector of the first optocoupler (N1) light-receiving end connects the first DC power supply terminal and believes as monitoring
Number output end；The emitter of the first optocoupler (N1) light-receiving end is grounded.
7. MBUS water meter collection as claimed in claim 6 copies switching circuit, which is characterized in that defeated as signal on processor (U1)
The pin for entering proper pole connects the anode of relay (U2) normal-closed end by the 5th resistance (R5), is used as signal on processor (U1)
The pin of input cathode connects the cathode of relay (U2) normal-closed end by the 5th resistance (R5).
8. MBUS water meter collection as claimed in claim 7 copies switching circuit, which is characterized in that further include TVS pipe, TVS pipe series connection
Between the positive and negative anodes of relay (U2) normal-closed end.
9. MBUS water meter collection as claimed in claim 6 copies switching circuit, which is characterized in that the first optocoupler (N1) luminous end is just
Pole passes through first by second resistance (R2) connection the second DC power supply terminal (VCC2), the collector of the first optocoupler (N1) light-receiving end
Resistance (R1) connects the first DC power supply terminal (VCC1).
10. MBUS water meter collection as claimed in claim 6 copies switching circuit, which is characterized in that the first optocoupler (N1) and the second light
Coupling (N2) is all made of LTV-816S-TA1-D3-TX.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910423896.7A CN110246322A (en) | 2019-05-21 | 2019-05-21 | A kind of MBUS water meter collection copies switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910423896.7A CN110246322A (en) | 2019-05-21 | 2019-05-21 | A kind of MBUS water meter collection copies switching circuit |
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| CN110246322A true CN110246322A (en) | 2019-09-17 |
Family
ID=67884672
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| CN201910423896.7A Pending CN110246322A (en) | 2019-05-21 | 2019-05-21 | A kind of MBUS water meter collection copies switching circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110708051A (en) * | 2019-09-18 | 2020-01-17 | 安徽南瑞中天电力电子有限公司 | Switch control logic circuit |
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| JP2000069015A (en) * | 1998-08-18 | 2000-03-03 | Nakayo Telecommun Inc | Branching device for atm-m bus system |
| CN1518187A (en) * | 2002-08-19 | 2004-08-04 | �γ�������ܵ����豸����˾ | Intelligent low-voltage distribution network telecontrol and meter reading integrated system |
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| CN110708051A (en) * | 2019-09-18 | 2020-01-17 | 安徽南瑞中天电力电子有限公司 | Switch control logic circuit |
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Application publication date: 20190917 |