CN209513906U - For detecting the circuit of intelligent electric energy meter communication module overcurrent - Google Patents
For detecting the circuit of intelligent electric energy meter communication module overcurrent Download PDFInfo
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- CN209513906U CN209513906U CN201822202899.1U CN201822202899U CN209513906U CN 209513906 U CN209513906 U CN 209513906U CN 201822202899 U CN201822202899 U CN 201822202899U CN 209513906 U CN209513906 U CN 209513906U
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Abstract
The utility model discloses a kind of for detecting the circuit of intelligent electric energy meter communication module overcurrent, including single-chip microcontroller, power circuit, operational amplifier U1, electronic switch, bleeder circuit, sample circuit and intelligent electric energy meter communication module；The single-chip microcontroller is electrically connected with the output end of electronic switch and operational amplifier U1 respectively；The non-inverting input terminal of operational amplifier U1 is electrically connected with bleeder circuit, and the inverting input terminal of operational amplifier U1 is electrically connected with sample circuit and intelligent electric energy meter communication module respectively；Intelligent electric energy meter communication module is electrically connected with electronic switch；Single-chip microcontroller, electronic switch, bleeder circuit and operational amplifier U1 the first operating voltage end be electrically connected with power circuit；The second operating voltage end, bleeder circuit and the sample circuit of operational amplifier U1 is grounded.The utility model is capable of the over-current state of real-time detection intelligent electric energy meter communication module, improves safety, plays a protective role to intelligent electric energy meter.
Description
Technical field
The utility model relates to instrument and meter detection technique fields, can reduce intelligent electric energy meter function more particularly, to one kind
Consumption improves safety, the circuit for being used to detect intelligent electric energy meter communication module overcurrent to play a protective role to intelligent electric energy meter.
Background technique
Current intelligent electric energy meter does not carry out overcurrent detection to the communication module of intelligent electric energy meter, still, gives intelligence electricity
The power supply of the communication module of energy table is generally used the power supply much larger than rated current, when the communication module of intelligent electric energy meter
When breaking down, for example, module load becomes small resistance value shape load, high current flows through the communication module of intelligent electric energy meter, makes to lead to
Module heating is interrogated, power supply power consumption is caused to become larger extremely, burns meter transformer, wastes electric energy.
Utility model content
The utility model is in order to overcome the power supply power consumption existing in the prior art when communication module breaks down to become extremely
Greatly, meter transformer is burnt, the deficiency of electric energy is wasted, providing one kind can reduce intelligent electric energy meter power consumption, safety is improved,
The circuit for being used to detect intelligent electric energy meter communication module overcurrent to play a protective role to intelligent electric energy meter.
To achieve the goals above, the utility model uses following technical scheme:
It is a kind of for detecting the circuit of intelligent electric energy meter communication module overcurrent, including single-chip microcontroller, power circuit, operation amplifier
Device U1, electronic switch, bleeder circuit, sample circuit and intelligent electric energy meter communication module；The single-chip microcontroller respectively with electronic switch
It is electrically connected with the output end of operational amplifier U1；The non-inverting input terminal of operational amplifier U1 is electrically connected with bleeder circuit, and operation is put
The inverting input terminal of big device U1 is electrically connected with sample circuit and intelligent electric energy meter communication module respectively；Intelligent electric energy meter communication module
It is electrically connected with electronic switch；Single-chip microcontroller, electronic switch, bleeder circuit and operational amplifier U1 the first operating voltage end with electricity
Source circuit electrical connection；The second operating voltage end, bleeder circuit and the sample circuit of operational amplifier U1 is grounded.
The utility model passes through the non-inverting input terminal of operational amplifier comparator/operational amplifier U1 and the electricity of inverting input terminal
Pressure, and comparison result is passed into single-chip microcontroller by the output end of operational amplifier U1, single-chip microcontroller is according to different comparison knots
Fruit carries out different processing, realizes the overcurrent protection to intelligent electric energy meter communication module.
Preferably, the bleeder circuit includes resistance R1 and resistance R3；One end of resistance R1 and one end of resistance R3 are equal
It is electrically connected with the non-inverting input terminal of operational amplifier U1, the other end of resistance R1 is electrically connected with power circuit, and resistance R3's is another
End ground connection.
Preferably, the sample circuit includes resistance R4；One end of resistance R4 reverse phase with operational amplifier U1 respectively
Input terminal and the electrical connection of intelligent electric energy meter communication module, the other end ground connection of resistance R4.
Preferably, further including resistance R2 and warning circuit；Resistance R2 respectively with single-chip microcontroller, power circuit and operation amplifier
The output end of device U1 is electrically connected, warning circuit and monolithic mechatronics；Related personnel can be notified to handle in time, improve safety
Property.
Preferably, the model LM393 of operational amplifier U1.
Therefore, the utility model has the following beneficial effects: the utility model being capable of the communication of real-time detection intelligent electric energy meter
The over-current state of module, plays a protective role to intelligent electric energy meter；It can reduce intelligent electric energy meter communication module power failure table
Power consumption；When overcurrent, power supply and the alarm that signal automatically cuts off communication module are issued by single-chip microcontroller, improve safety
Detailed description of the invention
Fig. 1 is a kind of circuit diagram of the utility model.
In figure: single-chip microcontroller 1, power circuit 2, bleeder circuit 3, sample circuit 4, intelligent electric energy meter communication module 5, alarm electricity
Road 6.
Specific embodiment
The utility model is described further with specific embodiment with reference to the accompanying drawing:
Embodiment
Embodiment as shown in Figure 1 is the circuit for detecting intelligent electric energy meter communication module overcurrent, including single-chip microcontroller 1,
Power circuit 2, operational amplifier U1, resistance R2, field-effect tube V1, bleeder circuit 3, sample circuit 4, intelligent electric energy meter communicate mould
Block 5 and warning circuit 6；The single-chip microcontroller respectively with the grid of field-effect tube V1, one end of resistance R2, operational amplifier U1
7 pins and warning circuit electrical connection；The 5th pin of operational amplifier U1 is electrically connected with bleeder circuit, and the 6th of operational amplifier U1 the
Pin is electrically connected with sample circuit and intelligent electric energy meter communication module respectively；Intelligent electric energy meter communication module is with field-effect tube V1's
Drain electrode electrical connection；Single-chip microcontroller, the source electrode of field-effect tube V1, bleeder circuit, the 8th pin of operational amplifier U1 and resistance R2 it is another
One end is electrically connected with power circuit, and power circuit is single-chip microcontroller, field-effect tube V1, bleeder circuit, operational amplifier U1 and electricity
It hinders R2 and power supply is provided；The 4th pin, bleeder circuit and the sample circuit of operational amplifier U1 is grounded；The type of operational amplifier U1
Number be LM393；Field-effect tube V1 is electronic switch.
Wherein, as shown in Figure 1, bleeder circuit includes resistance R1 and resistance R3；The sample circuit includes resistance R4；Resistance
One end of R1 and one end of resistance R3 are electrically connected with the 5th pin of operational amplifier U1, the other end and the power supply electricity of resistance R1
Road electrical connection, the other end ground connection of resistance R3；One end of resistance R4 respectively with the 6th pin of operational amplifier U1 and intelligent electric energy
The electrical connection of table communication module, the other end ground connection of resistance R4.
The course of work of the utility model is as follows:
Single-chip microcontroller opens the power supply of intelligent electric energy meter communication module by control field-effect tube V1, and electric current I flows through intelligent electricity
It can table communication module；The electric current I flowed through is converted to voltage U by sampling resistor R46 feet, U6 feet=R4 × I；Pass through operational amplifier U1
The voltage U of the 5th pin of comparator/operational amplifier U15 feetWith the voltage U of the 6th pin6 feet, whereinUBenchmark=1.25V；Comparison result is passed into monolithic from the 7th pin of operational amplifier U1
Machine works as U6 feet> U5 feetWhen, the 7th pin of operational amplifier U1 exports low level, indicates intelligent electric energy meter communication module overcurrent, single
Piece organ closes intelligent electric energy meter communication module power supply, avoids transformer overload fever damage, protection electric energy meter internal transformer electricity
Source reduces ammeter power consumption, improves safety, and alarm by warning circuit, issues prompting sound, reminds related personnel timely
Processing；Work as U6 feet≤U5 feetWhen, constantly constantly detection intelligent electric energy meter communication module whether overcurrent.
It should be understood that the present embodiment is merely to illustrate the utility model rather than limitation the scope of the utility model.Furthermore
It should be understood that after reading the content taught by the present invention, those skilled in the art can make the utility model various
Change or modification, these equivalent forms also fall within the scope of the appended claims of the present application.
Claims (5)
1. a kind of for detecting the circuit of intelligent electric energy meter communication module overcurrent, which is characterized in that including single-chip microcontroller (1), power supply
Circuit (2), operational amplifier U1, electronic switch, bleeder circuit (3), sample circuit (4) and intelligent electric energy meter communication module (5)；
The single-chip microcontroller is electrically connected with the output end of electronic switch and operational amplifier U1 respectively；The non-inverting input terminal of operational amplifier U1
It is electrically connected with bleeder circuit, the inverting input terminal of operational amplifier U1 is electric with sample circuit and intelligent electric energy meter communication module respectively
Connection；Intelligent electric energy meter communication module is electrically connected with electronic switch；Single-chip microcontroller, electronic switch, bleeder circuit and operational amplifier
The first operating voltage end of U1 is electrically connected with power circuit；The second operating voltage end of operational amplifier U1, bleeder circuit and
Sample circuit is grounded.
2. according to claim 1 for detecting the circuit of intelligent electric energy meter communication module overcurrent, which is characterized in that described
Bleeder circuit includes resistance R1 and resistance R3；One end of resistance R1 and one end of resistance R3 are same mutually defeated with operational amplifier U1
Enter end electrical connection, the other end of resistance R1 is electrically connected with power circuit, the other end ground connection of resistance R3.
3. according to claim 1 for detecting the circuit of intelligent electric energy meter communication module overcurrent, which is characterized in that described
Sample circuit includes resistance R4；One end of resistance R4 is communicated with the inverting input terminal of operational amplifier U1 and intelligent electric energy meter respectively
Module electrical connection, the other end ground connection of resistance R4.
4. according to claim 1 for detecting the circuit of intelligent electric energy meter communication module overcurrent, which is characterized in that also wrap
Include resistance R2 and warning circuit (6)；Output end of the resistance R2 respectively with single-chip microcontroller, power circuit and operational amplifier U1 is electrically connected
It connects, warning circuit and monolithic mechatronics.
5. according to claim 1 or 2 or 3 or 4 for detecting the circuit of intelligent electric energy meter communication module overcurrent, feature
It is, the model LM393 of operational amplifier U1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822202899.1U CN209513906U (en) | 2018-12-26 | 2018-12-26 | For detecting the circuit of intelligent electric energy meter communication module overcurrent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822202899.1U CN209513906U (en) | 2018-12-26 | 2018-12-26 | For detecting the circuit of intelligent electric energy meter communication module overcurrent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209513906U true CN209513906U (en) | 2019-10-18 |
Family
ID=68197321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822202899.1U Active CN209513906U (en) | 2018-12-26 | 2018-12-26 | For detecting the circuit of intelligent electric energy meter communication module overcurrent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209513906U (en) |
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2018
- 2018-12-26 CN CN201822202899.1U patent/CN209513906U/en active Active
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