CN215493820U - Single-phase intelligent electric energy meter - Google Patents

Abstract

The utility model provides a single-phase intelligent electric energy meter, which comprises: the system comprises a photoelectric detection circuit, a controller and a relay circuit, wherein the photoelectric detection circuit is connected with the input of a first end of the controller and is used for detecting the door opening and closing state of a region to be detected, generating a current signal according to the door opening and closing state of the region to be detected and sending the current signal to the controller; the first output end of the controller is connected with the first input end of the relay circuit, and the controller is used for generating a control signal according to the current signal and sending the control signal to the relay circuit; the output end of the relay circuit is connected with the load of the electric energy meter, and the relay circuit is used for controlling the working state of the load of the electric energy meter according to the control signal. By implementing the utility model, the problem that the power consumption is lost due to long-time power consumption to cause fire accidents because the high-power electric appliance is frequently forgotten to be closed because the load power supply cannot be automatically cut off after a merchant closes a store door after work is avoided.

Description

Single-phase intelligent electric energy meter

Technical Field

The utility model relates to the field of electric energy metering, in particular to a single-phase intelligent electric energy meter.

Background

With the development of economic technology and the improvement of living standard of people, electric energy becomes essential secondary energy in production and life of people, and brings endless convenience to production and life of people. The intelligent electric energy meter is a core metering component in an electric power system, and plays an important role in metering electric energy of a user. Therefore, the performance of the electric energy meter directly affects the accuracy of electric energy metering and the stable operation of the electric power system.

At present, an intelligent single-phase intelligent meter cannot realize unattended operation, namely, the load of an electric energy meter cannot be automatically turned on and power supply metering cannot be carried out when a merchant opens a door during working in the daytime; when the store door is closed during the next shift, the load power supply cannot be automatically cut off. The power consumption is lost due to long-time power consumption because the high-power electric appliance is forgotten to be turned off, and fire accidents are caused because the high-power electric appliance is used for a long time and is unattended.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the utility model is to overcome the defect that the intelligent single-phase intelligent meter in the prior art cannot realize unattended operation, thereby providing the single-phase intelligent electric energy meter.

In order to achieve the purpose, the utility model provides the following technical scheme:

the embodiment of the utility model provides a single-phase intelligent electric energy meter, which comprises: the device comprises a photoelectric detection circuit, a controller and a relay circuit, wherein the photoelectric detection circuit is in input connection with a first end of the controller and is used for detecting the door opening and closing state of a region to be detected, generating a current signal according to the door opening and closing state of the region to be detected and sending the current signal to the controller; the first output end of the controller is connected with the first input end of the relay circuit, and the controller is used for generating a control signal according to the current signal and sending the control signal to the relay circuit; the output end of the relay circuit is connected with the load of the electric energy meter, and the relay circuit is used for controlling the working state of the load of the electric energy meter according to the control signal.

Optionally, the photodetection circuit comprises: the output end of the photoelectric switch is connected with the input end of the first optical coupler device and used for detecting the opening and closing state of an area to be detected, generating a current signal according to the opening and closing state of the area to be detected and sending the current signal to the first optical coupler device; the output end of the first optocoupler is in input connection with the first end of the controller and used for carrying out photoelectric isolation processing on the current signal and sending the current signal after the photoelectric isolation processing to the controller.

Optionally, the single-phase intelligent electric energy meter further includes: the input end of the single-phase power supply input circuit is connected with an external single-phase power supply, and the first output end of the single-phase power supply input circuit is connected with the second input end of the controller and used for supplying power to the controller.

Optionally, the single-phase intelligent electric energy meter further includes: and the input end of the voltage stabilizing filter circuit is connected with the first output end of the single-phase power supply input circuit, and the output end of the voltage stabilizing filter circuit is connected with the second input end of the controller.

Optionally, the single-phase intelligent electric energy meter further includes: the single-phase voltage and current sampling circuit comprises a single-phase voltage and current sampling circuit and a metering chip, wherein the input end of the single-phase voltage and current sampling circuit is connected with the second output end of the single-phase power supply input circuit, and the first output end of the single-phase voltage and current sampling circuit is connected with the metering chip and is used for collecting a voltage signal and a current signal of an external single-phase power supply and sending the voltage signal and the current signal to the metering chip; the output end of the metering chip is in input connection with the third end of the controller and used for carrying out electric energy metering according to the received voltage signal and the received current signal to obtain electric quantity data and sending the electric quantity data to the controller.

Optionally, the single-phase intelligent electric energy meter further includes: and one end of the communication circuit is connected with the controller, and the other end of the communication circuit is connected with an upper computer.

Optionally, the single-phase intelligent electric energy meter further includes: and the output end of the power failure data storage battery is connected with the fourth input end of the controller and is used for providing a standby power supply for the controller.

Optionally, the single-phase intelligent electric energy meter further includes: and the display circuit is connected with the controller and is used for displaying the electric quantity data.

Optionally, the single-phase intelligent electric energy meter further includes: and the memory is connected with the controller and is used for storing the electric quantity data.

Optionally, the controller is of type FM 3308.

The technical scheme of the utility model has the following advantages:

the utility model provides a single-phase intelligent electric energy meter, which comprises: the system comprises a photoelectric detection circuit, a controller and a relay circuit, wherein the photoelectric detection circuit is connected with the input of a first end of the controller and is used for detecting the door opening and closing state of a region to be detected, generating a current signal according to the door opening and closing state of the region to be detected and sending the current signal to the controller; the first output end of the controller is connected with the first input end of the relay circuit, and the controller is used for generating a control signal according to the current signal and sending the control signal to the relay circuit; the output end of the relay circuit is connected with the load of the electric energy meter, and the relay circuit is used for controlling the working state of the load of the electric energy meter according to the control signal. The photoelectric detection circuit is additionally arranged in the single-phase intelligent electric energy meter and used for detecting the door opening and closing state of the store door in the area to be detected, and then the load switch of the electric energy meter is opened or closed according to the door opening and closing state of the store door in the area to be detected. Therefore, the problem that the power consumption is lost due to long-time power consumption to cause fire accidents because the high-power electric appliance is frequently forgotten to be closed due to the fact that the load power supply cannot be automatically cut off after a merchant closes a shop door during work is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic block diagram of a specific example of a single-phase intelligent electric energy meter according to an embodiment of the present invention;

FIG. 2 is a diagram of a photo-detection circuit according to an embodiment of the present invention;

fig. 3 is a schematic block diagram of another specific example of the single-phase intelligent electric energy meter according to the embodiment of the utility model;

FIG. 4 is a circuit diagram of a single-phase voltage-current sampling circuit according to an embodiment of the present invention;

FIG. 5 shows a metrology chip in accordance with an embodiment of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The embodiment of the utility model provides a single-phase intelligent electric energy meter which is applied to the scenes of electric energy metering of merchants and power load protection. As shown in fig. 1, the single-phase intelligent electric energy meter includes: the device comprises aphotoelectric detection circuit 1, acontroller 2 and arelay circuit 3, wherein thephotoelectric detection circuit 1 is connected with the input of the first end of thecontroller 2, thephotoelectric detection circuit 1 is used for detecting the opening and closing state of a region to be detected, generating a current signal according to the opening and closing state of the region to be detected, and sending the current signal to thecontroller 2; the first output end of thecontroller 2 is connected with the first input end of therelay circuit 3, and thecontroller 2 is used for generating a control signal according to the current signal and sending the control signal to therelay circuit 3; the output end of therelay circuit 3 is connected with the load of the electric energy meter, and therelay circuit 3 is used for controlling the working state of the load of the electric energy meter according to the control signal.

In an embodiment, when the area to be detected is opened, thephotoelectric detection circuit 1 generates a first current signal after detecting the open state, and sends the first current signal to thecontroller 2 when the circuit is turned on. Thecontroller 2 receives the first current signal and then judges that the area to be detected is in a door opening state, judges that the user has an electricity demand at the moment, further generates a first control signal and sends the first control signal to therelay circuit 3. Therelay circuit 3 opens the load switch of the electric energy meter according to the first control signal, so that a user can normally use electricity. When the door of the area to be detected is closed, thephotoelectric detection circuit 1 generates a second current signal after detecting the door closing state, and sends the second current signal to thecontroller 2 when the door is closed. Thecontroller 2 receives the second current signal and then judges that the area to be detected is in a door closing state, judges that the user does not have a power consumption requirement at the moment, and further generates a second control signal and sends the second control signal to therelay circuit 3. And therelay circuit 3 closes the load switch of the electric energy meter according to the second control signal, and cuts off a load power supply to ensure the electricity utilization safety of the commercial tenant. In the present embodiment, thecontroller 2 is of the type FM 3308.

The utility model provides a single-phase intelligent electric energy meter, which comprises: the system comprises a photoelectric detection circuit, a controller and a relay circuit, wherein the photoelectric detection circuit is connected with the input of a first end of the controller and is used for detecting the door opening and closing state of a region to be detected, generating a current signal according to the door opening and closing state of the region to be detected and sending the current signal to the controller; the first output end of the controller is connected with the first input end of the relay circuit, and the controller is used for generating a control signal according to the current signal and sending the control signal to the relay circuit; the output end of the relay circuit is connected with the load of the electric energy meter, and the relay circuit is used for controlling the working state of the load of the electric energy meter according to the control signal. The photoelectric detection circuit is additionally arranged in the single-phase intelligent electric energy meter and used for detecting the door opening and closing state of the store door in the area to be detected, and then the load switch of the electric energy meter is opened or closed according to the door opening and closing state of the store door in the area to be detected. Therefore, the problem that the power consumption is lost due to long-time power consumption to cause fire accidents because the high-power electric appliance is frequently forgotten to be closed due to the fact that the load power supply cannot be automatically cut off after a merchant closes a shop door during work is solved.

In one embodiment, as shown in fig. 2, thephotodetection circuit 1 includes: the device comprises aphotoelectric switch 101 and a firstoptical coupler 102, wherein the output end of thephotoelectric switch 101 is connected with the input end of the firstoptical coupler 102, and the photoelectric switch is used for detecting the on-off state of a region to be detected, generating a current signal according to the on-off state of the region to be detected, and sending the current signal to the firstoptical coupler 102; the output end of thefirst optocoupler 102 is connected with the first end input of thecontroller 2, and is configured to perform photoelectric isolation processing on the current signal, and send the current signal after the photoelectric isolation processing to thecontroller 2.

In a specific embodiment, thephotoelectric switch 101 determines the door opening and closing state of the store door in the region to be detected by using the shielding or reflecting effect of the store door in the region to be detected on the light beam, and converts the light variation of the transmitting end and the receiving end in thephotoelectric switch 101 into a current signal, thereby achieving the purpose of detecting the door opening and closing state of the region to be detected. Thephotoelectric switch 101 sends the current signal to the firstoptical coupler 102 for photoelectric isolation processing, so that the input end and the output end of the firstoptical coupler 102 are electrically isolated from each other, and the influence of the output end on the input end is avoided.

In an embodiment, as shown in fig. 3, the single-phase intelligent electric energy meter further includes: the input end of the single-phase powersupply input circuit 4 is connected with an external single-phase power supply, and the first output end of the single-phase powersupply input circuit 4 is connected with the second input end of thecontroller 2 and used for supplying power to thecontroller 2.

In a specific embodiment, the single-phase intelligent electric energy meter further comprises: and the input end of the voltage stabilizingfilter circuit 5 is connected with the first output end of the single-phase powersupply input circuit 4, and the output end of the voltage stabilizing filter circuit is connected with the second input end of thecontroller 2.

In the embodiment of the utility model, the input end of the single-phasepower input circuit 4 is respectively connected with the L-phase and N-phase wire inlet of the external single-phase power. The first output end of the single-phase powersupply input circuit 4 is connected with the input end of the voltage-stabilizingfilter circuit 5, the single-phase powersupply input circuit 4 sends the acquired electric energy to the voltage-stabilizingfilter circuit 5 to perform voltage-stabilizing filter processing, a high-quality power supply is obtained, and then thecontroller 2 is powered. In the embodiment of the utility model, the single-phasepower input circuit 4 adopts a power input circuit formed by a transformer.

Further, as shown in fig. 3, the single-phase intelligent electric energy meter further includes: and the output end of the power failuredata storage battery 6 is connected with the fourth input end of thecontroller 2 and is used for providing a standby power supply for thecontroller 2.

In the embodiment of the present invention, the power outagedata storage battery 6 is a backup power supply. When the external single-phase power supply fails and cannot supply power to thecontroller 2, the power failuredata storage battery 6 starts to start. In order to ensure that thecontroller 2 is not powered off after the external single-phase power supply fails, the power failuredata storage battery 6 preferentially provides power for the functions of storing data of the electric energy meter and the like.

In an embodiment, as shown in fig. 3, the single-phase intelligent electric energy meter further includes: the single-phase voltage andcurrent sampling circuit 7 and themetering chip 8 are arranged, wherein the input end of the single-phase voltage andcurrent sampling circuit 7 is connected with the second output end of the single-phasepower input circuit 4, and the first output end of the single-phase voltage andcurrent sampling circuit 7 is connected with themetering chip 8 and is used for acquiring a voltage signal and a current signal of an external single-phase power and sending the voltage signal and the current signal to themetering chip 8; the output end of themetering chip 8 is in input connection with the third end of thecontroller 2 and is used for carrying out electric energy metering according to the received voltage signal and the received current signal to obtain electric quantity data and sending the electric quantity data to thecontroller 2.

In a specific embodiment, the single-phase voltage andcurrent sampling circuit 7 is shown in fig. 4, and the P1 and N1 are terminated to the manganese copper sheet for collecting a current signal of an external single-phase power supply, converting the current signal of the external single-phase power supply into a voltage signal, and sending the voltage signal to themetering chip 8 shown in fig. 5. Similarly, the P2 and the N2 are terminated to a current transformer, and are used for collecting a voltage signal of an external single-phase power supply and sending the voltage signal of the external single-phase power supply to themetering chip 8 shown in fig. 5. Themetering chip 8 calculates based on the voltage signal and the current signal to obtain electric quantity data, and sends the electric quantity data to thecontroller 2. It should be noted that the calculation methods related to themetering chip 8 in the embodiment of the present invention are all mature calculation methods in the prior art, so as to obtain electrical data information, such as electric energy, power, and the like, after performing calculation based on the voltage signal and the current signal, which is not described herein again. In the embodiment of the utility model, the model of themetering chip 8 is RN 08209.

In an embodiment, as shown in fig. 3, the single-phase intelligent electric energy meter further includes: and one end of thecommunication circuit 9 is connected with thecontroller 2, and the other end of thecommunication circuit 9 is connected with the upper computer.

In one embodiment, thecommunication circuit 9 includes an RS485 communication circuit and an infrared communication circuit. The single-phase intelligent electric energy meter comprises a single-phase intelligent electric energy meter body, wherein the single-phase intelligent electric energy meter body is provided with an RS485 communication interface for communication connection, and the RS485 communication circuit is connected with the single-phase intelligent electric energy meter through the RS485 communication interface. The RS485 communication circuit realizes interconnection of the electric energy meters in the region through the RS485 communication interface arranged on the electric energy meter body, and centralized control of the single-phase intelligent electric energy meters in the region is facilitated. The infrared communication circuit is connected between thecontroller 2 and the upper computer and used for realizing communication between thecontroller 2 and the upper computer.

In an embodiment, as shown in fig. 3, the single-phase intelligent electric energy meter further includes: and thedisplay circuit 10 is connected with thecontroller 2 and used for displaying the electric quantity data.

In one embodiment, thedisplay circuit 10 includes LCD liquid crystal. The display module is a liquid crystal display, and comprises a Liquid Crystal Display (LCD) and a liquid crystal driving chip IC6, the model is TM1621, thecontroller 2 writes display parameters and data into the liquid crystal driving chip in a Serial Peripheral Interface (SPI) mode, and drives the liquid crystal display to display corresponding parameters such as electric energy, voltage, current and the like.

In an embodiment, as shown in fig. 3, the single-phase intelligent electric energy meter further includes: and thememory 11 is connected with thecontroller 2 and used for storing the electric quantity data.

In a specific embodiment, the single-phase intelligent electric energy meter further comprises: and thepulse indicating circuit 12 is connected with thecontroller 2 and is used for displaying the state of the load of the electric energy meter based on the opening signal or the closing signal. In the embodiment of the utility model, the pulse indicating circuit adopts a light emitting diode. The user can observe the load state of the electric energy meter at a glance according to the state of the light-emitting diode

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the utility model may be made without departing from the spirit or scope of the utility model.

Claims (10)

1. A single-phase intelligent electric energy meter is characterized by comprising: a photoelectric detection circuit, a controller and a relay circuit, wherein,

the photoelectric detection circuit is connected with the first end input of the controller, and is used for detecting the door opening and closing state of a region to be detected, generating a current signal according to the door opening and closing state of the region to be detected, and sending the current signal to the controller;

the first output end of the controller is connected with the first input end of the relay circuit, and the controller is used for generating a control signal according to the current signal and sending the control signal to the relay circuit;

the output end of the relay circuit is connected with the load of the electric energy meter, and the relay circuit is used for controlling the working state of the load of the electric energy meter according to the control signal.

2. The single-phase intelligent electric energy meter according to claim 1, wherein the photo-detection circuit comprises: a photoelectric switch and a first optical coupler, wherein,

the output end of the photoelectric switch is connected with the input end of the first optical coupler device and used for detecting the door opening and closing state of a region to be detected, generating a current signal according to the door opening and closing state of the region to be detected and sending the current signal to the first optical coupler device;

the output end of the first optocoupler is in input connection with the first end of the controller and used for carrying out photoelectric isolation processing on the current signal and sending the current signal after the photoelectric isolation processing to the controller.

3. The single-phase intelligent electric energy meter according to claim 1, further comprising: the input end of the single-phase power supply input circuit is connected with an external single-phase power supply, and the first output end of the single-phase power supply input circuit is connected with the second input end of the controller and used for supplying power to the controller.

4. The single-phase intelligent electric energy meter according to claim 3, further comprising: and the input end of the voltage stabilizing filter circuit is connected with the first output end of the single-phase power supply input circuit, and the output end of the voltage stabilizing filter circuit is connected with the second input end of the controller.

5. The single-phase intelligent electric energy meter according to claim 3, further comprising: a single-phase voltage and current sampling circuit and a metering chip, wherein,

the input end of the single-phase voltage and current sampling circuit is connected with the second output end of the single-phase power supply input circuit, and the first output end of the single-phase voltage and current sampling circuit is connected with the metering chip and is used for collecting a voltage signal and a current signal of an external single-phase power supply and sending the voltage signal and the current signal to the metering chip;

the output end of the metering chip is in input connection with the third end of the controller and used for carrying out electric energy metering according to the received voltage signal and the received current signal to obtain electric quantity data and sending the electric quantity data to the controller.

6. The single-phase intelligent electric energy meter according to claim 1, further comprising: and one end of the communication circuit is connected with the controller, and the other end of the communication circuit is connected with an upper computer.

7. The single-phase intelligent electric energy meter according to claim 3, further comprising: and the output end of the power failure data storage battery is connected with the fourth input end of the controller and is used for providing a standby power supply for the controller.

8. The single-phase intelligent electric energy meter according to claim 5, further comprising: and the display circuit is connected with the controller and is used for displaying the electric quantity data.

9. The single-phase intelligent electric energy meter according to claim 5, further comprising: and the memory is connected with the controller and is used for storing the electric quantity data.

10. The single-phase intelligent electric energy meter according to claim 1, wherein the controller is of type FM 3308.

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