CN206490417U - A kind of electricity, water, air and heat multilist collection copy collector M Bus interface overload protection circuits - Google Patents
A kind of electricity, water, air and heat multilist collection copy collector M Bus interface overload protection circuits Download PDFInfo
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- CN206490417U CN206490417U CN201621314449.6U CN201621314449U CN206490417U CN 206490417 U CN206490417 U CN 206490417U CN 201621314449 U CN201621314449 U CN 201621314449U CN 206490417 U CN206490417 U CN 206490417U
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- 230000004224 protection Effects 0.000 title claims abstract description 26
- 230000005611 electricity Effects 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 238000005070 sampling Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000007667 floating Methods 0.000 abstract description 2
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Abstract
Collector M Bus interface overload protection circuits are copied the utility model discloses a kind of electricity, water, air and heat multilist collection, including：Current sampling circuit, voltage ratio compared with and output hysteresis circuitry, photoelectric coupled circuit, the current sampling circuit, be connected with M Bus buses, the electric current in the M Bus buses be converted into voltage detection signal, and by the voltage detection signal be sent to the voltage ratio compared with and output hysteresis circuitry；The voltage ratio compared with and output hysteresis circuitry receive the voltage detection signal by voltage ratio compared with and hysteresis after output overloading signal, the photoelectric coupled circuit receives the overload signal and will simultaneously be exported after its optocoupler to the controller.M Bus two buses are respectively arranged with the overload protecting circuit.Avoid the floating influence of voltage, exportable stable overload signal, avoid the situation that controller is unable to trigger protection or the protection of short time repeated trigger, it is ensured that system stable operation.
Description
Technical field
The utility model is related to circuit overload protection technique field, specifically, is that a kind of electricity, water, air and heat multilist collection are copied
Collector M-Bus interface overload protection circuits.
Background technology
M-Bus（MeterBus）Bus is also known as customer meter bus, is a kind of New Bus structure.M-Bus is mainly special
Point is only to be powered simultaneously and transmitting serial data with two nonpolarity transmission lines, and each slave module is connected in parallel in M-Bus buses.
The bus is all widely used in various fields, especially in the energy consumption intelligent management for building automatic different instrument
When in system, related data or signal can be acquired and be transferred to concentrator, number is then passed to by corresponding interface again
According to collection center.
The convenience of intelligent remote meter reading based on M-Bus buses, State Grid Corporation of China's emphasis promotes " unification of four tables "
Engineering, the data integrated remote copying patterns of government utility such as water, electricity, warm, gas are realized using the existing acquisition platform of power system,
Purpose is to make new with energy service mode, the construction of comprehensive support smart city, reduces meter reading workload and hardware repeats to build
If.
If slave module breaks down in M-Bus buses, such as overload or short circuit can burn M-Bus bus masters, because
This, can typically be provided with protection circuit in bus.
At present, the overload of M-Bus bus protections circuit, short-circuit detecting mode are mainly the size variation of detection voltage, always
The domain of walker of voltage is larger on line, and system is easily judged by accident.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of electricity, water, air and heat multilist collection and copies collector M-Bus and connect
Mouth overload protecting circuit, accurate for circuit overload or short-circuit detecting, system failure rate is low.
In order to solve the above-mentioned technical problem, the utility model provides a kind of electricity, water, air and heat multilist collection and copies collector M-
Bus interface overload protection circuits, including：Current sampling circuit, voltage ratio compared with and output hysteresis circuitry, current sample electricity
Road, is connected with M-Bus buses, the electric current in the M-Bus buses is converted into voltage detection signal, and the voltage detecting is believed
Number be sent to the voltage ratio compared with and output hysteresis circuitry；
The voltage ratio compared with and output hysteresis circuitry, be connected with the current sampling circuit, receives the current sample electric
Road send voltage detection signal, by the voltage detection signal by voltage ratio compared with and hysteresis after output overloading signal,
And the overload signal is sent to the controller.
Further, in addition to photoelectric coupled circuit, the photoelectric coupled circuit be located at voltage ratio compared with and output hysteresis circuitry with it is described
Between controller, receive the overload signal and by after its optocoupler to the controller.
Further, M-Bus two buses are respectively arranged with the overload protecting circuit.
Further, the voltage ratio compared with and output hysteresis circuitry be made up of comparator and hysteresis circuitry, wherein,
The comparator, is connected with the current sampling circuit, for will turn after the voltage detection signal voltage ratio
The first overload signal is changed to, and first overload signal is sent to the hysteresis circuitry；
The hysteresis circuitry, is connected with the comparator, for will be converted to after the first overload signal hysteresis
Second overload signal, and second overload signal is sent to the controller.
Further, reference voltage circuit built in the comparator.
Further, the comparator is model TPS3779 binary channels voltage detector.
Further, the voltage ratio compared with and output hysteresis circuitry also include resistor voltage divider circuit, electric resistance partial pressure electricity
Road will be exported to the comparator after the voltage detection signal partial pressure.
Further, the current sampling circuit includes：The resistance of one setting numerical value.
Electricity of the present utility model, water, air and heat multilist collection copy collector M-Bus interface overload protection circuits, with following excellent
Point：
1. pass through electric current on sample bus, it is to avoid the floating influence of voltage；
2. make use of voltage ratio compared with and output hysteresis circuitry, exportable stable overload signal；
3. due to being mutually isolated between photo-coupler input and output, it is to avoid controller is unable to trigger protection or the short time repeats
The situation of trigger protection, it is ensured that system stable operation.
Brief description of the drawings
Fig. 1 is the composition frame chart of the overload protecting circuit of data acquisition unit of the present utility model；
Fig. 2 is the sample circuit of embodiment one of the present utility model；
Fig. 3 is the resistor voltage divider circuit of embodiment one of the present utility model；
Fig. 4 is the comparator of embodiment one of the present utility model and hysteresis circuitry；
Fig. 5 is the photoelectric coupled circuit of embodiment one of the present utility model.
Embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings, so that those skilled in the art
The utility model may be better understood and can be practiced, but illustrated embodiment is limited not as to of the present utility model.
As shown in figure 1, electricity, water, air and heat multilist collection copy collector M-Bus interface overload protection circuits, mainly adopted by electric current
Sample circuit, voltage ratio compared with and output hysteresis circuitry, photoelectric coupled circuit, controller constitute.The voltage ratio compared with and output hysteresis circuitry
Including resistor voltage divider circuit, comparator and hysteresis circuitry, reference voltage circuit built in the comparator.
Current signal in the current sampling circuit sampling M-Bus buses, is converted to voltage signal, the voltage signal warp
Exported after the resistor voltage divider circuit partial pressure to the input in the same direction of the comparator, the reference voltage is input to the comparison
The reverse input end of device, the comparator output overloading signal, the overload signal is after hysteresis circuitry sluggishness, output to control
Device, the controller is received after overload signal, turns off M-Bus bus power sources.
Embodiment one, the present embodiment is double M-Bus channel overload protection circuits, while two buses are protected, point
Wei not M-Bus buses 0 and M-Bus buses 1：
For M-Bus buses 0：
As shown in Fig. 2 the current sampling signal electricity routing resistance R19 is formed；As shown in figure 3, the electric resistance partial pressure electricity
Routing resistance R130, R140 are constituted；As shown in figure 5, the photoelectric coupled circuit is made up of D17, R49, R81；
For M-Bus buses 1：
As shown in Fig. 2 the current sampling signal electricity routing resistance R54 is formed；As shown in figure 3, the electric resistance partial pressure electricity
Routing resistance R88, R129 are constituted；As shown in figure 5, the photoelectric coupled circuit is made up of D36, R85, R148；
As shown in figure 4, the comparator is the binary channels voltage detector of built-in reference voltage circuit, such as model
TPS3779 High Precision Dual voltage detector, the output hysteresis circuitry is made up of R141, R144, C101；
The current signal of the negative pole of the M-Bus buses 0 samples to form voltage signal MBUS0- through the resistance R19, electricity
Pressure signal forms adjustable voltage detection signal SENSE1 by resistor voltage divider circuit, and SENSE1 passes through the voltage of the comparator
Comparison and the hysteresis of hysteresis circuitry, output overloading signal to the photoelectric coupled circuit, overload signal form GZ_ after optocoupler
MBUS1 signals are to MCU（Microcontroller Unit, single-chip microcomputer）, MCU is received to carry out protecting warning dynamic accordingly after signal
Make.
The current signal of the negative pole of the M-Bus buses 1 samples to form voltage signal MBUS1- through the resistance R54, electricity
Pressure signal forms adjustable voltage detection signal SENSE2 by resistor voltage divider circuit, and SENSE2 passes through the voltage of the comparator
Comparison and the hysteresis of hysteresis circuitry, output overloading signal to the photoelectric coupled circuit, overload signal form GZ_ after optocoupler
MBUS2 signals are to MCU（Microcontroller Unit, single-chip microcomputer）, MCU is received to carry out protecting warning dynamic accordingly after signal
Make.
Output current is set as Iout, sampling resistor is 5 Ω;
After sampling resistor, the sampled value MBUS0- of electric current=5*Iout, MBUS1-=5*Iout is obtained;
The sampled value is drawn after divider resistance：
SENSE1= R140/(R130+R140)*5Iout;SENSE2= R129/(R88+R129)*5Iout。
Reference voltage is set as 1.15V;
OUT1, OUT2 voltage are low level under normal condition, when SENSE1, SENSE2 value are more than 1.15V, correspondence
OUT1, OUT2 export high level, and corresponding GZ_MBUS1, GZ_MBUS2 export high level, and MCU detects this high level signal,
Corresponding overload processing is carried out, such as overload is indicated and power-off electrical source protecting.
Embodiment described above is only the preferred embodiment to absolutely prove the utility model and being lifted, the utility model
Protection domain not limited to this.Equivalent substitute or change that those skilled in the art are made on the basis of the utility model
Change, within protection domain of the present utility model.Protection domain of the present utility model is defined by claims.
Claims (8)
1. a kind of electricity, water, air and heat multilist collection copy collector M-Bus interface overload protection circuits, it is characterised in that including：Electric current
Sample circuit and voltage ratio compared with and output hysteresis circuitry, wherein,
The current sampling circuit, is connected with M-Bus buses, and the electric current in the M-Bus buses is converted into voltage detecting letter
Number, and by the voltage detection signal be sent to the voltage ratio compared with and output hysteresis circuitry；
The voltage ratio compared with and output hysteresis circuitry, be connected with the current sampling circuit, receives the current sampling circuit and send out
The voltage detection signal sent, by the voltage detection signal by voltage ratio compared with and hysteresis after output overloading signal, and will
The overload signal is sent to controller.
2. electricity as claimed in claim 1, water, air and heat multilist collection copy collector M-Bus interface overload protection circuits, its feature
Be, in addition to photoelectric coupled circuit, the photoelectric coupled circuit be located at voltage ratio compared with and output hysteresis circuitry and the controller between, use
Exported in after the reception overload signal and by its optocoupler to the controller.
3. electricity as claimed in claim 2, water, air and heat multilist collection copy collector M-Bus interface overload protection circuits, its feature
It is, M-Bus two buses are respectively arranged with the overload protecting circuit.
4. electricity as claimed in claim 1, water, air and heat multilist collection copy collector M-Bus interface overload protection circuits, its feature
Be, the voltage ratio compared with and output hysteresis circuitry be made up of comparator and hysteresis circuitry, wherein,
The comparator, is connected with the current sampling circuit, for will be converted to after the voltage detection signal voltage ratio
First overload signal, and first overload signal is sent to the hysteresis circuitry；
The hysteresis circuitry, is connected with the comparator, for will be converted to second after the first overload signal hysteresis
Overload signal, and second overload signal is sent to the controller.
5. electricity as claimed in claim 4, water, air and heat multilist collection copy collector M-Bus interface overload protection circuits, its feature
It is, reference voltage circuit built in the comparator.
6. electricity as claimed in claim 5, water, air and heat multilist collection copy collector M-Bus interface overload protection circuits, its feature
It is, the comparator is model TPS3779 binary channels voltage detector.
7. electricity as claimed in claim 4, water, air and heat multilist collection copy collector M-Bus interface overload protection circuits, its feature
Be, the voltage ratio compared with and output hysteresis circuitry also include resistor voltage divider circuit, the resistor voltage divider circuit is by the voltage
Exported after detection signal partial pressure to the comparator.
8. the electricity, water, air and heat multilist collection as described in claim 1 ~ 7 is any copy collector M-Bus interface overload protection circuits,
Characterized in that, the current sampling circuit includes：The resistance of one setting numerical value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621314449.6U CN206490417U (en) | 2016-12-02 | 2016-12-02 | A kind of electricity, water, air and heat multilist collection copy collector M Bus interface overload protection circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621314449.6U CN206490417U (en) | 2016-12-02 | 2016-12-02 | A kind of electricity, water, air and heat multilist collection copy collector M Bus interface overload protection circuits |
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| Publication Number | Publication Date |
|---|---|
| CN206490417U true CN206490417U (en) | 2017-09-12 |
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ID=59767890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621314449.6U Active CN206490417U (en) | 2016-12-02 | 2016-12-02 | A kind of electricity, water, air and heat multilist collection copy collector M Bus interface overload protection circuits |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109903546A (en) * | 2019-04-02 | 2019-06-18 | 国网江苏省电力有限公司宜兴市供电分公司 | A kind of M-BUS circuit and multi-mode communication multi-protocols water meter acquiring device |
-
2016
- 2016-12-02 CN CN201621314449.6U patent/CN206490417U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109903546A (en) * | 2019-04-02 | 2019-06-18 | 国网江苏省电力有限公司宜兴市供电分公司 | A kind of M-BUS circuit and multi-mode communication multi-protocols water meter acquiring device |
| CN109903546B (en) * | 2019-04-02 | 2024-06-25 | 国网江苏省电力有限公司宜兴市供电分公司 | M-BUS circuit and multimode communication multiprotocol water meter collector |
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