CN216252681U - Single-phase thing networking electric quantity sensor - Google Patents
Single-phase thing networking electric quantity sensor Download PDFInfo
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- CN216252681U CN216252681U CN202121013766.5U CN202121013766U CN216252681U CN 216252681 U CN216252681 U CN 216252681U CN 202121013766 U CN202121013766 U CN 202121013766U CN 216252681 U CN216252681 U CN 216252681U
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Abstract
The utility model discloses a single-phase Internet of things electric quantity sensor, which comprises: the metering device comprises a metering module, a switch control circuit and a main control module, wherein a first end of the metering module is connected with a load of an electric quantity sensor, a second end of the metering module is connected with an input end of the main control module, and the metering module collects voltage and current signals of the load and sends the voltage and current signals to the main control module; the output end of the main control module is connected with the control end of the switch control circuit and used for comparing the voltage and current signals sent by the metering module with the corresponding preset threshold value, generating switch control signals according to the comparison result and sending the switch control signals to the switch control circuit; the first end of the switch control circuit is connected with a power supply of the load, the second end of the switch control circuit is connected with the load, and the load is controlled to be powered off according to the switch control signal. The overvoltage and overcurrent protection device realizes the overvoltage and overcurrent protection function through the main control module, the metering module and the switch control circuit, and plays a role in protecting the electric appliance of a user.
Description
Technical Field
The utility model relates to the field of electric quantity sensors, in particular to a single-phase Internet of things electric quantity sensor.
Background
In recent years, the technology of the internet of things is rapidly developed, wherein the narrowband internet of things NB-iot communication has the advantages of low power consumption, long distance, large connection and the like. The application of the narrow-band Internet of things NB-iot communication technology to data copying and control in the power industry is increasing. The electric quantity sensor of the Internet of things is manufactured by adopting an ultra-large scale digital signal processing chip, a memory for permanently storing information, advanced technologies such as narrow-band Internet of things NB-iot communication and wide-temperature liquid crystal display and an advanced SMT (surface mount technology), has the functions of electric energy metering, information storage and processing, real-time monitoring, automatic control, information interaction and the like, and gradually replaces manual meter reading operation by remote data acquisition of the Internet of things, so that the arrearage behavior can be effectively stopped, and the requirement of an electric power department for effectively and timely carrying out modern scientific management on users is met.
However, the existing internet of things electric quantity sensor generally does not have an overvoltage and overcurrent protection function, and effective overvoltage and overcurrent protection cannot be performed on electric equipment of a user.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem to be solved by the utility model is to overcome the defect that the electric quantity sensor of the internet of things in the prior art generally does not have an overvoltage and overcurrent protection function and cannot protect the electric appliance of a user, thereby providing the single-phase electric quantity sensor of the internet of things.
In order to achieve the purpose, the utility model provides the following technical scheme:
the embodiment of the utility model provides a single-phase Internet of things electric quantity sensor, which is characterized by comprising the following components: the metering device comprises a metering module, a switch control circuit and a main control module, wherein a first end of the metering module is connected with a load of an electric quantity sensor, and a second end of the metering module is connected with an input end of the main control module and is used for collecting a voltage signal and a current signal of the load and sending the voltage signal and/or the current signal to the main control module; the first output end of the main control module is connected with the control end of the switch control circuit and is used for comparing the voltage signal and/or the current signal sent by the metering module with the corresponding preset voltage threshold value and/or preset current threshold value, generating a switch control signal according to the comparison result and sending the switch control signal to the switch control circuit; and the first end of the switch control circuit is connected with a power supply of the load, and the second end of the switch control circuit is connected with the load and used for controlling the load to be powered off according to the switch control signal.
In one embodiment, the switch control circuit includes: the switch comprises a switch control chip and a controlled switch, wherein a first input end and a second input end of the switch control chip are connected with the main control module, and an output end of the switch control chip is connected with a control end of the controlled switch; the first output end of the controlled switch is connected with a power supply of the load, and the second output end of the controlled switch is connected with the load.
In one embodiment, the controlled switch is: a triode or a relay.
In one embodiment, the master control module includes: the metering module comprises a first comparison circuit and/or a second comparison circuit, wherein a first input end of the first comparison circuit is externally connected with a voltage signal sent by the metering module, a second input end of the first comparison circuit is externally connected with a preset voltage threshold, and an output end of the first comparison circuit outputs a switch control signal; the first input end of the second comparison circuit is externally connected with a current signal sent by the metering module, the second input end of the second comparison circuit is externally connected with a preset current threshold value, and the output end of the second comparison circuit outputs a switch control signal.
In one embodiment, the method further comprises: and the first indicator light is connected with the main control module and is used for displaying the working state of the controlled switch.
In one embodiment, the metering module comprises: the voltage sampling circuit comprises a metering chip, a voltage sampling circuit and a current sampling circuit, wherein the first end of the voltage sampling circuit is connected with the load, and the second end of the voltage sampling circuit is connected with the metering chip and is used for transmitting a collected voltage signal to the metering chip; the first end of the current sampling circuit is connected with the load, and the second end of the current sampling circuit is connected with the metering chip and used for transmitting the acquired current signal to the metering chip; the metering chip is connected with the main control module, calculates the received voltage signals and current signals to obtain voltage signal data, current signal data and power parameters, and then sends the voltage signal data, the current signal data and the power parameters to the main control module.
In one embodiment, the method further comprises: a display module, the display module comprising: the liquid crystal display device comprises a liquid crystal driving chip and an LCD (liquid crystal display), wherein the first end of the liquid crystal driving chip is connected with a main control module, the second end of the liquid crystal driving chip is connected with the LCD, and the main control module writes voltage signal data, current signal data and power parameters which need to be displayed into the liquid crystal driving chip and drives the LCD to display through the liquid crystal driving chip.
In one embodiment, the method further comprises: and the storage module is connected with the main control module and used for finishing data exchange with the main control module and storing the data information sent by the metering module.
In one embodiment, the method further comprises: the first end of the communication module is connected with the main control module, the second end of the communication module is connected with the user terminal through the antenna, and the communication module is used for establishing communication between the user terminal and the single-phase Internet of things electric quantity sensor.
In one embodiment, the method further comprises: and the second indicator light is connected with the main control module and is used for displaying the working state of the power supply.
The technical scheme of the utility model has the following advantages:
the utility model provides a single-phase Internet of things electric quantity sensor which comprises a metering module, a switch control circuit and a main control module, wherein the first end of the metering module is connected with a load of the electric quantity sensor, and the second end of the metering module is connected with the input end of the main control module and is used for collecting a voltage signal and a current signal of the load and sending the voltage signal and/or the current signal to the main control module; the output end of the main control module is connected with the control end of the switch control circuit and is used for comparing the voltage signal and/or the current signal sent by the metering module with the corresponding preset voltage threshold value and/or preset current threshold value, generating a switch control signal according to the comparison result and sending the switch control signal to the switch control circuit; the first end of the switch control circuit is connected with a power supply of the load, and the second end of the switch control circuit is connected with the load and used for controlling the load to be powered off according to the switch control signal. The main control module acquires a voltage signal and a current signal of a load acquired by the metering module, compares the voltage signal and the current signal with a preset threshold value, and sends an instruction to control the switch control circuit to be switched off when the voltage signal and/or the current signal exceed the threshold value, so that the overvoltage and overcurrent protection function is realized, and the electric appliance of a user is protected.
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 structural diagram of a specific example of a single-phase internet-of-things electric quantity sensor according to the present invention;
fig. 2 is a schematic structural diagram of a switch control circuit according to an embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of a metrology module according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a memory module according to 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 internet of things electric quantity sensor, which is applied to occasions where users need to perform overvoltage and overcurrent protection on electric appliances through the electric quantity sensor, and as shown in figure 1, the single-phase internet of things electric quantity sensor comprises: the metering system comprises a metering module 2, a switch control circuit 3 and a main control module 1, wherein the metering methods used in the metering module 2 are mature metering methods in the prior art, and the control methods used in the main control module 1 are mature control methods in the prior art, wherein the first end of the metering module 2 is connected with a load of an electric quantity sensor, and the second end of the metering module is connected with the input end of the main control module 1 and is used for collecting a voltage signal and a current signal of the load and sending the voltage signal and/or the current signal to the main control module 1; the first output end of the main control module 1 is connected with the control end of the switch control circuit 3, and is used for comparing the voltage signal and/or the current signal sent by the metering module 2 with the corresponding preset voltage threshold value and/or preset current threshold value, generating a switch control signal according to the comparison result, and sending the switch control signal to the switch control circuit 3; the first end of the switch control circuit 3 is connected with the power supply of the load, and the second end is connected with the load and used for controlling the load to be powered off according to the switch control signal.
According to the single-phase Internet of things electric quantity sensor provided by the utility model, the voltage signal and the current signal of the load acquired by the metering module 2 are acquired through the main control module 1, the voltage signal and the current signal are compared with the preset threshold value, the preset threshold value can be set by a user according to the condition of an electric appliance, once the voltage signal and/or the current signal exceed the threshold value, the main control module 1 sends an instruction to control the switch control circuit 3 to be switched off, so that an overvoltage and overcurrent protection function is realized, and the electric appliance of the user is protected.
In an embodiment, as shown in fig. 2, the switch control circuit 3 includes: the control method comprises a switch control chip 21 and a controlled switch 22, wherein the control methods used in the switch control chip 21 are mature control methods in the prior art, a first input end and a second input end of the switch control chip 21 are connected with a main control module 1, and an output end of the switch control chip is connected with a control end of the controlled switch 22; the controlled switch 22 has a first output connected to the power supply of the load and a second output connected to the load.
Specifically, as shown in fig. 2, the switch control chip 21 has two input terminals KA and KB, both of which are connected to the main control module 1, where the first input terminal KA receives a disconnection signal when the voltage exceeds the threshold, the second input terminal KB receives a disconnection signal when the current exceeds the threshold, and the first input terminal and/or the second input terminal receives the disconnection signal and sends out a disconnection signal through the output terminals QA and/or QB to control the controlled switch 22 to be disconnected, so as to disconnect the connection between the load and the load power supply, thereby protecting the load from damage to the load due to overvoltage/overcurrent.
In an embodiment, the controlled switch 22 is: it should be noted that, in the embodiment of the present invention, a relay is taken as an example of the controlled switch 22, in practical applications, the controlled switch 22 may be another type of switch as long as the on/off control function according to the control signal can be implemented, and the present invention is not limited thereto.
In an embodiment, the main control module 1 includes: the comparison method used in the comparison circuit is a mature comparison method in the prior art, wherein a first input end of the first comparison circuit is externally connected with a voltage signal sent by the metering module 2, a second input end of the first comparison circuit is externally connected with a preset voltage threshold, and an output end of the first comparison circuit outputs a switch control signal; the first input end of the second comparison circuit is externally connected with a current signal sent by the metering module 2, the second input end of the second comparison circuit is externally connected with a preset current threshold, and the output end of the second comparison circuit outputs a switch control signal.
Specifically, the first comparison circuit receives the voltage signal and then compares the voltage signal with a preset voltage threshold, and when the voltage signal exceeds the voltage threshold, a disconnection signal is sent to the switch control circuit; the second comparison circuit receives the current signal and then compares the current signal with a preset current threshold, and when the current signal exceeds the current threshold, a disconnection signal is sent to the switch control module 3; when one of the first comparison circuit and the second comparison circuit sends out a disconnection signal or simultaneously sends out the disconnection signal, the switch control chip 21 receives the disconnection signal, and then controls the controlled switch 22 to be disconnected, and the connection between the load and the load power supply is cut off.
In a specific embodiment, the single-phase internet of things electric quantity sensor further includes: and the first indicator light is connected with the main control module 1 and is used for displaying the working state of the controlled switch 22.
Specifically, the first indicator light is used for displaying the working state of the controlled switch 22, and in a normal state, the first indicator light is in an off state, and when an overvoltage and overcurrent condition occurs, the main control chip controls the controlled switch 22 in the switch control circuit 3 to be turned off and simultaneously lights the first indicator light, so that a prompt effect is provided for a user, the user is prompted to have an overvoltage/overcurrent problem, and the fault can be timely handled.
In an embodiment, the metering module 2 includes: the metering device comprises a metering chip 31, a voltage sampling circuit 32 and a current sampling circuit 33, wherein the metering methods used in the metering chip 31 are all mature methods in the prior art, and reference can be made to fig. 3 for example, but fig. 3 is only used as a reference and is not used as a limitation on the circuit part of the metering module in the present invention, wherein a first end of the voltage sampling circuit 32 is connected with a load, and a second end is connected with the metering chip 31 for transmitting the collected voltage signals to the metering chip 31; the first end of the current sampling circuit 33 is connected with the load, and the second end is connected with the metering chip 31, and is used for transmitting the acquired current signal to the metering chip 31; the metering chip 31 is connected with the main control module 1, calculates the received voltage signal and current signal to obtain voltage signal data, current signal data and power parameter, and then sends the voltage signal data, current signal data and power parameter to the main control module 1.
Specifically, the voltage sampling circuit 32 collects a voltage signal of the load, and transmits the collected voltage signal to the metering chip 31; the current sampling circuit 33 collects a current signal of a load and transmits the collected current signal to the metering chip 31; the metering chip 31 is used for receiving the voltage signal and the current signal and calculating the voltage signal and the current signal to obtain data such as voltage signal data, current signal data, power parameters and the like; the specific contents comprise active power, reactive power, apparent power, power factors, grid frequency and the like; the metering chip 31 sends the data to the main control module 1, so that the main control module 1 can process the data in the next step.
In an embodiment, the single-phase internet of things electric quantity sensor further includes: display module 4, display module 4 includes: the liquid crystal display device comprises a liquid crystal driving chip and an LCD (liquid crystal display) screen, wherein the first end of the liquid crystal driving chip is connected with a main control module 1, the second end of the liquid crystal driving chip is connected with the LCD screen, voltage signal data, current signal data and power parameters which need to be displayed are written into the liquid crystal driving chip by the main control module 1, and the liquid crystal driving chip drives the LCD screen to display the voltage signal data, the current signal data and the power parameters.
Specifically, the main control module 1 drives the received data information of the metering module 2 to an LCD (liquid crystal display) through a liquid crystal driving chip to display parameters such as electric energy, voltage, current and the like; through using the LCD screen, reduced the consumption that shows, and the LCD screen low radiation, the picture is soft, brings better use experience for the user.
In a specific embodiment, the single-phase internet of things electric quantity sensor further includes: and the storage module 5 is connected with the main control module 1 and used for finishing data exchange with the main control module 1 and storing the data information sent by the metering module 2.
Specifically, fig. 4 is referred to as a circuit diagram part of the memory module 5, but fig. 4 is only used as a reference and not as a limitation to a circuit design thereof, the main control module 1 stores received data sent by the metering module 2 to the memory module 5, the memory module 5 is a ferroelectric memory chip, such as MB85RC16, the ferroelectric memory chip has a power-off capability of retaining data, can store data quickly under a low power requirement, and has high reliability and low cost.
In a specific embodiment, the single-phase internet of things electric quantity sensor further includes: the first end of the communication module 6 is connected with the main control module 1, the second end of the communication module 6 is connected with the user terminal through the antenna, and the communication module 6 is used for establishing communication between the user terminal and the single-phase Internet of things electric quantity sensor.
Specifically, the main control module 1 transmits data to the user terminal through the communication module 6, communication between the user terminal and the single-phase internet of things electric quantity sensor is established, data collection is conducted remotely, compared with manual meter reading operation, arrearage behaviors can be effectively avoided, and therefore the requirement that an electric power department effectively conducts modern scientific management on users in time is met.
In a specific embodiment, the single-phase internet of things electric quantity sensor further includes: and the second indicator light is connected with the main control module 1 and is used for displaying the working state of the power supply.
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 therefrom are within the scope of the utility model.
Claims (9)
1. The utility model provides a single-phase thing networking electric quantity sensor which characterized in that includes: a metering module, a switch control circuit and a main control module,
the first end of the metering module is connected with a load of the electric quantity sensor, and the second end of the metering module is connected with the input end of the main control module and is used for collecting a voltage signal and a current signal of the load and sending the voltage signal and/or the current signal to the main control module;
the output end of the main control module is connected with the control end of the switch control circuit and is used for comparing the voltage signal and/or the current signal sent by the metering module with the corresponding preset voltage threshold value and/or preset current threshold value, generating a switch control signal according to the comparison result and sending the switch control signal to the switch control circuit;
the master control module comprises: a first comparison circuit and/or a second comparison circuit, wherein,
a first input end of the first comparison circuit is externally connected with a voltage signal sent by the metering module, a second input end of the first comparison circuit is externally connected with a preset voltage threshold, and an output end of the first comparison circuit outputs a switch control signal;
a first input end of the second comparison circuit is externally connected with a current signal sent by the metering module, a second input end of the second comparison circuit is externally connected with a preset current threshold, and an output end of the second comparison circuit outputs a switch control signal;
and the first end of the switch control circuit is connected with a power supply of the load, and the second end of the switch control circuit is connected with the load and used for controlling the load to be powered off according to the switch control signal.
2. The single-phase internet of things electric quantity sensor according to claim 1, wherein the switch control circuit comprises: a switch control chip and a controlled switch, wherein,
the first input end and the second input end of the switch control chip are connected with the main control module, and the output end of the switch control chip is connected with the control end of the controlled switch; the first output end of the controlled switch is connected with a power supply of the load, and the second output end of the controlled switch is connected with the load.
3. The single-phase internet of things electric quantity sensor according to claim 2, wherein the controlled switch is: a triode or a relay.
4. The single-phase internet of things electricity sensor of claim 2, further comprising: and the first indicator light is connected with the main control module and is used for displaying the working state of the controlled switch.
5. The single-phase internet of things electricity sensor of claim 1, wherein the metering module comprises: a metering chip, a voltage sampling circuit and a current sampling circuit, wherein,
the first end of the voltage sampling circuit is connected with the load, and the second end of the voltage sampling circuit is connected with the metering chip and used for transmitting the acquired voltage signal to the metering chip;
the first end of the current sampling circuit is connected with the load, and the second end of the current sampling circuit is connected with the metering chip and used for transmitting the acquired current signal to the metering chip;
the metering chip is connected with the main control module, calculates the received voltage signals and current signals to obtain voltage signal data, current signal data and power parameters, and then sends the voltage signal data, the current signal data and the power parameters to the main control module.
6. The single-phase internet of things electricity sensor of claim 5, further comprising:
a display module, the display module comprising: the liquid crystal display device comprises a liquid crystal driving chip and an LCD (liquid crystal display), wherein the first end of the liquid crystal driving chip is connected with a main control module, the second end of the liquid crystal driving chip is connected with the LCD, and the main control module writes voltage signal data, current signal data and power parameters which need to be displayed into the liquid crystal driving chip and drives the LCD to display through the liquid crystal driving chip.
7. The single-phase internet of things electricity sensor of claim 1, further comprising:
and the storage module is connected with the main control module and used for finishing data exchange with the main control module and storing the data information sent by the metering module.
8. The single-phase internet of things electricity sensor of claim 1, further comprising:
the first end of the communication module is connected with the main control module, the second end of the communication module is connected with the user terminal through the antenna, and the communication module is used for establishing communication between the user terminal and the single-phase Internet of things electric quantity sensor.
9. The single-phase internet of things electricity sensor of claim 1, further comprising: and the second indicator light is connected with the main control module and is used for displaying the working state of the power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202121013766.5U CN216252681U (en) | 2021-05-12 | 2021-05-12 | Single-phase thing networking electric quantity sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121013766.5U CN216252681U (en) | 2021-05-12 | 2021-05-12 | Single-phase thing networking electric quantity sensor |
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| CN216252681U true CN216252681U (en) | 2022-04-08 |
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| CN202121013766.5U Active CN216252681U (en) | 2021-05-12 | 2021-05-12 | Single-phase thing networking electric quantity sensor |
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