CN212750068U - Non-contact detection system for intelligent electric meter - Google Patents
Non-contact detection system for intelligent electric meter Download PDFInfo
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- CN212750068U CN212750068U CN202021607023.6U CN202021607023U CN212750068U CN 212750068 U CN212750068 U CN 212750068U CN 202021607023 U CN202021607023 U CN 202021607023U CN 212750068 U CN212750068 U CN 212750068U
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- signal detection
- electric meter
- detection circuit
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Abstract
The utility model relates to a non-contact detecting system for smart electric meter, including power box, smart electric meter, signal detection module is including setting up the signal detection board that signal detection circuit and cooperation signal detection circuit used in smart electric meter, signal detection circuit is connected to the master control MCU among the smart electric meter. The utility model discloses on the customer function basis of smart electric meter standard allotment, utilize light signal or electromagnetic signal, realize that the transmission of signal is carried out in the need not any contact between power box and the smart electric meter, it is with low costs to have, need not hardware secondary development, dispose through software and can open and close, use more in a flexible way, this scheme is wireless connection, not only the insulation level is higher, safer, and the design is simple moreover, the cost is lower, the circuit that this scheme detected all is inside smart electric meter and table case, consequently, the problem that the user tampers unable judgement responsibility has effectively been stopped.
Description
Technical Field
The utility model relates to a signal detection field, concretely relates to non-contact detecting system for smart electric meter.
Background
The intelligent electric meter is usually installed in an electric power box in actual use, in some underdeveloped areas, due to the existence of electricity stealing behaviors, an electric power bureau does not want a user to contact the intelligent electric meter or detect the behaviors of contacting the intelligent electric meter, wherein one effective mode is that a sensor is placed on the electric power box to detect the state of the intelligent electric meter, and state information is fed back to the intelligent electric meter to be stored and recorded.
The current general technical scheme is that a mechanical switch is mounted on an electric power box and connected with an intelligent electric meter through a wire, and under the condition that the electric power box is opened or closed, state information of the electric power box is transmitted to the intelligent electric meter through the wire and then converted into a digital signal through a conversion circuit, so that the purposes of monitoring and recording are achieved.
The above scheme has the following defects:
1. the intelligent electric meter structure needs to be separately added with an additional interface and a mechanical switch for wired connection, and is complex in design and high in cost;
2. the meter box and the electric meter must be connected by wire, and there is a risk that a user may touch the mechanical switch and the wire and cannot determine responsibility when intentional damage is performed.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a non-contact detecting system for smart electric meter through utilizing light signal or electromagnetic signal, realizes carrying out the transmission of signal between power box and the smart electric meter without any contact, has with low costs, need not hardware secondary development, disposes through software and can open and close, uses more in a flexible way.
The technical scheme of the utility model as follows:
the utility model provides a non-contact detecting system for smart electric meter, includes power box, smart electric meter, signal detection module is including setting up the signal detection board that signal detection circuit and cooperation signal detection circuit used in smart electric meter, signal detection circuit is connected to the master control MCU among the smart electric meter.
Preferably, the signal detection circuit is a light receiving signal detection circuit, a light emitting tube suitable for the light receiving signal detection circuit is further arranged in the smart electric meter, and the signal detection plate is a box door of the power box.
Preferably, the light receiving signal detection circuit comprises a transistor Q1, the base of the transistor Q1 is connected to the emitter of a transistor Q1 through a resistor R1, and the emitter of the transistor Q1 is grounded; the base electrode of the triode Q1 is also connected to a first power supply Vcc through a resistor R2 and a diode B1; the collector of the transistor Q1 is connected to a first power supply Vcc through a resistor R3.
Preferably, the resistance value of the resistor R1 is 120k Ω, the resistance value of the resistor R2 is 2k Ω, and the resistance value of the resistor R3 is 10k Ω.
Preferably, the diode B1 is a patch photodiode.
Preferably, the signal detection circuit is a magnetic detection circuit, the signal detection plate is a box door of the power box, and the middle signal detection plate is provided with a magnet.
Preferably, the magnetic detection circuit comprises a magnetic field detection chip U26, pin 1 of the magnetic field detection chip U26 is connected to pin 3 of the magnetic field detection chip U26 through a capacitor C2, pin 1 of the magnetic field detection chip U26 is also connected to a second power supply Vcc ', pin 2 of the magnetic field detection chip U26 is connected to a capacitor C1 and grounded, and pin 2 of the magnetic field detection chip U26 is also connected to the second power supply Vcc' through a resistor R4.
Preferably, the resistance value of the resistor R4 is 100k omega, and the capacitance values of the capacitor C1 and the capacitor C2 are both 0.1 muF.
The utility model has the advantages that: the utility model discloses on the customer function basis of smart electric meter standard configuration, utilize light signal or electromagnetic signal, realize carrying out the transmission of signal without any contact between power box and the smart electric meter, it is with low costs to have, need not hardware secondary development, can discern opening and the closed condition of power box through software configuration, use more in a flexible way, this scheme is wireless connection, not only the insulation level is higher, and is safer, and the design is simple, the cost is lower, the circuit that this scheme detected all is inside smart electric meter and table case, consequently, the problem that the user falsified unable judgement responsibility has effectively been stopped.
Drawings
Fig. 1 is the schematic diagram of the utility model discloses the power box door is closed in the light detection scheme.
Fig. 2 is the schematic diagram of the utility model discloses the electric power box door is opened in the light detection scheme.
Fig. 3 is a schematic circuit diagram of the optical received signal detection circuit.
Fig. 4 is the schematic diagram of the utility model discloses electric power box door is closed in the well magnetism detection scheme.
Fig. 5 is the schematic diagram of the utility model discloses well magnetic detection scheme in the electric power box chamber door close.
Fig. 6 is a circuit schematic of the magnetic detection circuit.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Example 1:
the utility model provides a non-contact detecting system for smart electric meter, includes power box, smart electric meter, signal detection module, and signal detection module is including setting up the signal detection board that signal detection circuit and cooperation signal detection circuit used in smart electric meter, and signal detection circuit is connected to the master control MCU among the smart electric meter, and the signal detection board is the chamber door of power box. The signal detection circuit is a light receiving signal detection circuit, and a light emitting tube suitable for the light receiving signal detection circuit is further arranged in the intelligent electric meter.
As shown in fig. 1, 2 and 3, the light receiving signal detecting circuit includes a transistor Q1, a base of the transistor Q1 is connected to an emitter of a transistor Q1 through a resistor R1, and an emitter of the transistor Q1 is grounded; the base electrode of the triode Q1 is also connected to a first power supply Vcc through a resistor R2 and a diode B1; the collector of the transistor Q1 is connected to a first power source Vcc through a resistor R3, and the diode B1 is a patch photodiode. The resistance of the resistor R1 is 120k omega, the resistance of the resistor R2 is 2k omega, and the resistance of the resistor R3 is 10k omega.
When the power box is closed, the light signal detection circuit can detect the existence of light according to the light reflection principle due to the fact that the light is shielded; when the power box is opened, the light signal detection circuit cannot detect light because of the absence of light reflection; under two states of opening and closing the box door, the light intensity received by the photosensitive diode is different, the voltage of the circuit and partial element load in the whole circuit is also different, the signal is changed and input to the main control MCU in the intelligent electric meter, the detection of the signal is completed according to software preset in the MCU, and then the purpose of distinguishing the state of the box door of the electric power box is achieved.
Example 2:
the utility model provides a non-contact detecting system for smart electric meter, includes power box, smart electric meter, signal detection module, and signal detection module is including setting up the signal detection board that signal detection circuit and cooperation signal detection circuit used in smart electric meter, and signal detection circuit is connected to the master control MCU among the smart electric meter, and the signal detection board is the chamber door of power box, is provided with magnet in the chamber door, and signal detection circuit is magnetism detection circuit.
As shown in fig. 4, 5 and 6, the magnetic detection circuit includes a magnetic field detection chip U26, pin 1 of the magnetic field detection chip U26 is connected to pin 3 of the magnetic field detection chip U26 through a capacitor C2, pin 1 of the magnetic field detection chip U26 is also connected to a second power supply Vcc ', pin 2 of the magnetic field detection chip U26 is connected to a capacitor C1 and grounded, and pin 2 of the magnetic field detection chip U26 is also connected to the second power supply Vcc' through a resistor R4. Wherein the resistance of the resistor R4 is 100k omega, and the capacitance values of the capacitor C1 and the capacitor C2 are both 0.1 muF.
The principle of the embodiment is as follows: according to the principle that the magnetic field intensity is different under the condition of different distances, when the power box is closed, the magnetic field intensity is strong; when the power box is opened, the magnetic field intensity is weak, the magnetic field intensity received by the magnetic field detection circuit is different under the two states of opening and closing the box door, the voltage of the circuit in the whole circuit and the voltage of part of element loads are also different, the signal is input to the main control MCU in the intelligent electric meter in a variable mode, the signal is detected according to software preset in the MCU, and therefore the state of the box door of the power box is distinguished.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the present invention. Are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a non-contact detecting system for smart electric meter, its characterized in that, includes power box, smart electric meter, signal detection module is including setting up the signal detection circuit in smart electric meter and the signal detection board that cooperation signal detection circuit used, signal detection circuit is connected to the master control MCU among the smart electric meter.
2. The system of claim 1, wherein the signal detection circuit is a light receiving signal detection circuit, the smart meter further comprises a light emitting tube adapted to the light receiving signal detection circuit, and the signal detection plate is a door of the power box.
3. The contactless detection system for a smart meter according to claim 2, wherein the light reception signal detection circuit includes a transistor Q1, a base of the transistor Q1 is connected to an emitter of a transistor Q1 via a resistor R1, and an emitter of the transistor Q1 is grounded; the base electrode of the triode Q1 is also connected to a first power supply Vcc through a resistor R2 and a diode B1; the collector of the transistor Q1 is connected to a first power supply Vcc through a resistor R3.
4. The contactless detection system for a smart meter according to claim 3, characterized in that the resistance value of the resistor R1 is 120k Ω, the resistance value of the resistor R2 is 2k Ω, and the resistance value of the resistor R3 is 10k Ω.
5. The contactless detection system for a smart meter according to claim 3, characterized in that the diode B1 is a photodiode.
6. The contactless detection system for a smart meter according to claim 1, wherein the signal detection circuit is a magnetic detection circuit, the signal detection board is a door of a power box, and a magnet is disposed in the signal detection board.
7. The contactless detection system for a smart meter according to claim 6, wherein the magnetic detection circuit includes a magnetic field detection chip U26, pin 1 of the magnetic field detection chip U26 is connected to pin 3 of the magnetic field detection chip U26 through a capacitor C2, pin 1 of the magnetic field detection chip U26 is further connected to a second power supply Vcc ', pin 2 of the magnetic field detection chip U26 is connected to a capacitor C1 and to ground, and pin 2 of the magnetic field detection chip U26 is further connected to the second power supply Vcc' through a resistor R4.
8. The contactless detection system for the smart meter according to claim 7, wherein the resistance value of the resistor R4 is 100k Ω, and the capacitance values of the capacitor C1 and the capacitor C2 are both 0.1 μ F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021607023.6U CN212750068U (en) | 2020-08-05 | 2020-08-05 | Non-contact detection system for intelligent electric meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021607023.6U CN212750068U (en) | 2020-08-05 | 2020-08-05 | Non-contact detection system for intelligent electric meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212750068U true CN212750068U (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021607023.6U Active CN212750068U (en) | 2020-08-05 | 2020-08-05 | Non-contact detection system for intelligent electric meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212750068U (en) |
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2020
- 2020-08-05 CN CN202021607023.6U patent/CN212750068U/en active Active
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