CN217739305U - Single-phase electric energy meter - Google Patents
Single-phase electric energy meter Download PDFInfo
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- CN217739305U CN217739305U CN202221866505.2U CN202221866505U CN217739305U CN 217739305 U CN217739305 U CN 217739305U CN 202221866505 U CN202221866505 U CN 202221866505U CN 217739305 U CN217739305 U CN 217739305U
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Abstract
The utility model discloses a single-phase electric energy meter, include: the device comprises a single-phase voltage and current sampling circuit, a controller and a relay circuit; the single-phase voltage and current sampling circuit and the relay circuit are both connected with a controller, the controller comprises an HT5017 chip, the HT5017 chip can measure combined, forward and reverse active electric energy in a time-sharing manner, and can measure parameters such as voltage, current, active power, power factor and frequency of a power grid in real time; the single-phase electric energy meter adopts the installation of standard 35mm guide rail, makes things convenient for the electric energy meter to install in building distribution box, saves space.
Description
Technical Field
The utility model relates to an instrument and meter technical field, concretely relates to single-phase electric energy meter.
Background
Compared with an induction type electric energy meter, the electronic electric energy meter has the advantages of high accuracy, low power consumption, small starting current, wide load range, no mechanical wear and the like, and is widely applied to daily life. The existing intelligent electric energy meters are mostly installed in a wall-mounted structure, so that the intelligent electric energy meters are large in size, high in cost and occupied in space; the existing intelligent electric energy meters all adopt the mode of MCU + LCD driving + metering chips, so that the cost is high and the anti-interference performance is poor; the existing intelligent electric energy meter communication protocol only supports a DL/T645 protocol and is incompatible with an industrial control MODBUS-RTU protocol.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the defect that the intelligent electric energy meter among the prior art cost is high to a single-phase electric energy meter is provided.
In order to achieve the above purpose, the utility model provides a following technical scheme:
an embodiment of the utility model provides a single-phase electric energy meter, include: the single-phase voltage and current sampling circuit comprises a single-phase voltage and current sampling circuit, a controller and a relay circuit; the single-phase voltage and current sampling circuit and the relay circuit are both connected with the controller; the controller comprises an HT5017 chip; the single-phase electric energy meter is installed by adopting a standard 35mm guide rail installation mode.
In one embodiment, the single-phase electric energy meter further includes: RS485 communication circuit and infrared communication circuit, RS485 communication circuit and infrared communication circuit are connected with the controller respectively.
In one embodiment, the single-phase electric energy meter further includes: and the storage circuit is connected with the controller and is used for storing the measurement data of the electric energy meter.
In one embodiment, the single-phase electric energy meter further includes: and the display circuit is connected with the controller and is used for displaying the data of the electric energy meter.
In one embodiment, the single-phase electric energy meter further includes: and the pulse indicating circuit is connected with the controller.
In one embodiment, the single-phase electric energy meter further includes: and the power supply circuit is connected with the controller and used for supplying power to the controller.
In one embodiment, a power supply circuit includes: the single-phase power supply input circuit and the rectification filtering voltage stabilizing circuit; the single-phase power input circuit is connected with the rectification filtering voltage stabilizing circuit; the rectification and filtering voltage stabilizing circuit is connected with the controller.
In one embodiment, the single-phase electric energy meter further includes: and the power failure data storage battery is connected with the controller and used for supplying power to the controller during power failure.
In one embodiment, the single-phase electric energy meter further includes: and the key circuit is connected with the controller.
In one embodiment, the single-phase electric energy meter further includes: the electric energy meter comprises an electric energy meter body, a control panel and a control panel, wherein the electric energy meter body comprises an L-phase wire inlet, an N-phase wire outlet and the control panel; the single-phase voltage and current sampling circuit, the controller, the power supply circuit and the display circuit are arranged on the control panel.
The utility model discloses technical scheme has following advantage:
the utility model provides a single-phase electric energy meter, include: the device comprises a single-phase voltage and current sampling circuit, a controller and a relay circuit; the single-phase voltage and current sampling circuit and the relay circuit are both connected with a controller, the controller comprises an HT5017 chip, the HT5017 chip can measure combined, forward and reverse active electric energy in a time-sharing manner, and can measure parameters such as voltage, current, active power, power factor and frequency of a power grid in real time; the single-phase electric energy meter adopts the installation of standard 35mm guide rail, makes things convenient for the electric energy meter to install in building distribution box, saves space.
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 embodiments or the technical solutions in 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 for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a block diagram of a single-phase electric energy meter according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a current sampling circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a voltage sampling circuit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a controller according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a relay circuit according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an R485 communication circuit in the embodiment of the present invention;
fig. 7a is a schematic structural diagram of an infrared receiving circuit according to an embodiment of the present invention; fig. 7b is a schematic structural diagram of an infrared transmitting circuit in an embodiment of the present invention;
fig. 8a is a schematic structural diagram of a display driving circuit according to an embodiment of the present invention; fig. 8b is a schematic structural diagram of a backlight circuit according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a pulse indication circuit according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a power supply circuit according to an embodiment of the present invention;
fig. 11 is a schematic diagram of a structure of a key circuit according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to 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", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific 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 is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be connected through the inside of the two elements, or may be connected wirelessly or through a wire. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Examples
The embodiment of the utility model provides a single-phase electric energy meter is applied to user's electric energy measurement and with electric load protection scene. The utility model discloses three-phase electric energy meter includes the electric energy meter body, is equipped with L looks and N looks business turn over line mouth on the electric energy meter body, the inside control panel that is equipped with of electric quantity sensor body, and L looks and N looks business turn over line mouth and outlet are located electric energy meter body bottom.
As shown in fig. 1, the single-phase electric energy meter of the embodiment of the present invention includes: the device comprises a single-phase voltage and current sampling circuit 1, a controller 2 and a relay circuit 3; the single-phase voltage and current sampling circuit 1 and the relay circuit 3 are both connected with the controller 2.
Further, the single-phase voltage and current sampling circuit 1 collects voltage signals and current signals, the controller 2 calculates electric quantity data based on the voltage signals and the current signals, and the controller 2 can also control the on-off state of the relay circuit 3 based on the electric quantity data.
Specifically, the single-phase voltage-current sampling circuit 1 includes a voltage sampling circuit shown in fig. 2 and a current sampling circuit shown in fig. 3, but is only for example and not limited thereto.
Further, the controller 2 includes an HT5017 chip; the HT5017 chip and the peripheral structure thereof are shown in FIG. 4. By adopting the design of a HT5017 special SOC chip, the device can measure the combined, forward and reverse active electric energy in a time-sharing manner and measure the parameters of voltage, current, active power, power factor, frequency and the like of a power grid in real time.
Firstly, most of the existing intelligent electric energy meters are installed in a wall-mounted structure, so that the intelligent electric energy meters are large in size, high in cost and large in occupied space, and for the single-phase electric energy meters in the embodiment of the utility model, the single-phase electric energy meters are installed in a standard 35mm guide rail installation mode, so that the electric energy meters can be conveniently installed in a building distribution box, and the space is saved; the single-phase SOC chip design is adopted, the functions are complete, the product reliability is high, and the product cost advantage is large.
Furthermore, the existing intelligent electric energy meters all adopt the mode of MCU + LCD driving + metering chip, so that the cost is high and the anti-interference performance is poor; the existing single-phase electric energy meter communication protocol only supports a DL/T645 protocol and is incompatible with an industrial control MODBUS-RTU protocol. Therefore, the utility model discloses electric energy meter communication protocol supports DL/T645 and MODBUS-RTU agreement simultaneously, uses extensively.
Further, as shown in fig. 5, the relay circuit 3 includes: a bidirectional relay driving integrated chip IC5, a relay coil J1, and resistors R37, R38, R39, R40.
Specifically, the third terminal KB of the bidirectional relay driving IC5 and the sixth terminal KA of the bidirectional relay driving IC5 are input terminals. The third terminal KB and the sixth terminal KA are both connected to the output terminal of the controller 2, and are configured to receive the first control signal sent by the controller 2. The first QB and the fourth QA of the bi-directional relay driving IC5 are output terminals. The first end QB is connected with the positive end of the relay coil J1, and the fourth end QA is connected with the negative end of the relay coil J1 and used for controlling the power failure state of the relay coil J1.
Specifically, the signal R0 and the signal RIN are first control signals sent by the controller 2. The signal R0 flows into the third terminal KB of the bidirectional relay driving integrated chip IC5 via the pull-down resistor R45 and the current limiting resistor R46. The signal RIN flows into the third terminal KB of the bidirectional relay driving integrated chip IC5 via the pull-down resistor R32 and the current limiting resistor R33. When the signal R0 is a high-level signal, the first end QB outputs the high-level signal, the relay coil J1 is electrified, and the single-phase power supply circuit works normally. When the signal RIN is a high level signal, the fourth end QA outputs a high level signal, the relay coil J1 loses power, the trip device operates, and the single-phase power line is switched, so that the purpose of ground fault protection is achieved.
In an embodiment, as shown in fig. 1, the single-phase electric energy meter further includes: the RS485 communication circuit 4 and the infrared communication circuit 5, and the RS485 communication circuit 4 and the infrared communication circuit 5 are respectively connected with the controller 2.
Alternatively, as shown in fig. 6, the RS485 communication circuit 4 includes resistors R28, R32, R36, R35, R34, R27, R32, R31, and PTC2, photocouplers U4 and U3, a transistor N2, a diode TVS1, and a communication chip IC4. Wherein RX _485 denotes a receiving signal interface, and TX _485 denotes a transmitting signal interface. The communication chip IC4 can select a MAX3085 model, and the photocoupler can select a NEC2501 model.
Optionally, the infrared communication circuit 5 includes an infrared receiving circuit and an infrared transmitting circuit. As shown in FIG. 7a, the infrared receiving circuit comprises a resistor R21 and an infrared receiving chip U6, wherein the model HS0038B can be selected as the infrared receiving chip U6. As shown in fig. 7b, the infrared emitting circuit includes resistors R20 and R22, a transistor N1, and a light emitting diode H1. The resistors R20 and R22 and the light emitting diode H1 are respectively connected to an emitting electrode, a base electrode and a collector electrode of the triode N1.
In an embodiment, as shown in fig. 1, the single-phase electric energy meter further includes: and the storage circuit 6 is connected with the controller 2 and is used for storing the measurement data of the electric energy meter. The memory circuit 6 may be constituted by a memory chip and its peripheral circuits.
In an embodiment, as shown in fig. 1, the single-phase electric energy meter further includes: and the display circuit 7 is connected with the controller 2 and is used for displaying the data of the electric energy meter.
Alternatively, the display circuit 7 may include a display driving circuit and a backlight circuit, and the display circuit 7 is configured to display data of the electric energy meter. As shown in fig. 8a, a circuit board structure of the display driving circuit is shown. As shown in fig. 8b, the backlight circuit includes resistors R14 and R13, a transistor N3 and a light emitting diode BG1.
In an embodiment, as shown in fig. 1, the single-phase electric energy meter further includes: and a pulse indication circuit 8 connected with the controller 2.
Alternatively, the pulse indication circuit 8 is shown in fig. 9, and fig. 9 includes two pulse indication circuits 8, where the first pulse indication circuit includes resistors R19 and R29, and a light emitting diode LED1 and a second photocoupler U2; the second pulse indicating circuit comprises a resistor R30 and a second photoelectric coupler U2. The first pulse indicating circuit is used for verifying active power and can also be used for measuring active electric energy; the second pulse indicating circuit is used for checking reactive power and can also be used for measuring reactive electric energy.
In an embodiment, as shown in fig. 1, the single-phase electric energy meter further includes: and the power supply circuit 9 is connected with the controller 2 and used for supplying power to the controller 2.
Further, as shown in fig. 1, the power supply circuit 9 includes: a single-phase power input circuit 91 and a rectification filtering voltage-stabilizing circuit 92; the single-phase power input circuit is connected with the rectification filtering voltage stabilizing circuit; the rectification filtering voltage stabilizing circuit is connected with the controller 2.
Alternatively, as shown in fig. 10, the single-phase power input circuit includes a transformer T1, a voltage dependent resistor YMG1, and a thermistor PTC1. The rectification and filtering voltage stabilizing circuit comprises a first voltage stabilizing circuit and a second voltage stabilizing circuit. The first regulator circuit includes a diode D2, capacitors C18, C19, and C20, and a regulator chip W2. The second voltage stabilizing circuit comprises a diode D1, capacitors C15, C16 and C17 and a voltage stabilizing chip W1.
In an embodiment, as shown in fig. 1, the single-phase electric energy meter further includes: the power failure data storage battery 10 is connected to the controller 2 and is used for supplying power to the controller 2 during power failure.
Alternatively, as shown in fig. 10, the power outage data saving battery 10 includes a battery BT1 and a switch J2 connected in series.
In an embodiment, as shown in fig. 1, the single-phase electric energy meter further includes: the key circuit 11 is connected to the controller 2.
Alternatively, as shown in fig. 11, the key circuit 11 includes four key inputs, in which the BS key indicates to fall back to the previous menu and save the setting; UP key represents page turning or number increasing of the same level menu; DN key represents page turning or number decreasing of the same level menu; the ST key indicates entering a next level menu or controlling cursor movement. Specifically, in each key input, a resistor and a capacitor may be included in series, one end of the resistor is connected to the controller 2, and one end of the capacitor is grounded.
In one embodiment, the single-phase electric energy meter further includes: the electric energy meter comprises an electric energy meter body, a control panel and a control panel, wherein the electric energy meter body comprises an L-phase wire inlet, an N-phase wire outlet and the control panel; the single-phase voltage and current sampling circuit 1, the controller 2, the power supply circuit 9 and the display circuit are arranged on the control panel.
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 changes and modifications can be made without departing from the scope of the invention.
Claims (10)
1. A single-phase electric energy meter, comprising:
the device comprises a single-phase voltage and current sampling circuit, a controller and a relay circuit;
the single-phase voltage and current sampling circuit and the relay circuit are both connected with the controller;
the controller comprises an HT5017 chip;
the single-phase electric energy meter is installed in a standard 35mm guide rail installation mode.
2. The single-phase electric energy meter according to claim 1, further comprising: RS485 communication circuit and infrared communication circuit, RS485 communication circuit and infrared communication circuit respectively with the controller is connected.
3. The single-phase electric energy meter according to claim 1, further comprising:
and the storage circuit is connected with the controller and is used for storing the measurement data of the electric energy meter.
4. The single-phase electric energy meter according to claim 1, further comprising:
and the display circuit is connected with the controller and is used for displaying the data of the electric energy meter.
5. The single-phase electric energy meter according to claim 1, further comprising:
and the pulse indicating circuit is connected with the controller.
6. The single-phase electric energy meter according to claim 4, further comprising:
and the power supply circuit is connected with the controller and used for supplying power to the controller.
7. The single-phase electric energy meter according to claim 6, wherein the power supply circuit comprises:
the single-phase power supply input circuit and the rectification filtering voltage stabilizing circuit;
the single-phase power supply input circuit is connected with the rectification filtering voltage stabilizing circuit;
the rectification and filtering voltage stabilizing circuit is connected with the controller.
8. The single-phase electric energy meter according to claim 6, further comprising:
and the power failure data storage battery is connected with the controller and used for supplying power to the controller during power failure.
9. The single-phase electric energy meter according to claim 6, further comprising:
and the key circuit is connected with the controller.
10. The single-phase electric energy meter according to claim 1, further comprising:
the electric energy meter comprises an electric energy meter body, a control panel and a control panel, wherein the electric energy meter body comprises an L-phase wire inlet, an N-phase wire outlet and the control panel;
the single-phase voltage and current sampling circuit, the controller, the power supply circuit and the display circuit are arranged on the control panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221866505.2U CN217739305U (en) | 2022-07-18 | 2022-07-18 | Single-phase electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221866505.2U CN217739305U (en) | 2022-07-18 | 2022-07-18 | Single-phase electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217739305U true CN217739305U (en) | 2022-11-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221866505.2U Active CN217739305U (en) | 2022-07-18 | 2022-07-18 | Single-phase electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217739305U (en) |
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2022
- 2022-07-18 CN CN202221866505.2U patent/CN217739305U/en active Active
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