Electrical parameter metering equipment and power distribution cabinet

Abstract

The utility model provides an electrical parameter metering device and a power distribution cabinet. The electrical parameter metering device comprises a current transformer which is used for obtaining a current signal on a measured line, and the measured line adopts alternating current; the plug assembly is used for accessing alternating current of a detected circuit; the electronic assembly is arranged in the plug assembly and comprises an alternating current-direct current conversion module, a voltage acquisition module, a metering module and a communication module which are integrally arranged; wherein the alternating current-direct current conversion module is used for converting alternating current into direct current; the voltage acquisition module is used for acquiring a voltage signal of a detected line; the metering module is connected with the voltage acquisition module and the current transformer, and is used for obtaining the electrical parameters of the measured line according to the current signal and the voltage signal. The communication module is connected with the metering module and is used for sending the electrical parameters to the outside; power connection is carried out through the plug assembly, complex wire breaking processing is not needed, the mounting and dismounting processes are greatly simplified, and meanwhile voltage detection and current detection can be carried out.

Description

Technical Field

[0001] This application relates to the field of electrical equipment, and more particularly, to an electrical parameter measurement device and a power distribution cabinet. Background Art

[0002] Referring to Figure 1 , a smart CT (Current Transformer) detects the current information on the power line through an ordinary wired current transformer 100', and then transmits it to the metering module 200'. The current information is processed by the metering module 200', and then communicates with the outside (such as a local or cloud platform) through wifi (Wireless Fidelity) communication 300'.

[0003] In order to ensure the timeliness of communication, in the related art, the power supply method of the smart CT mostly uses a type-c interface for power supply, or it is necessary to connect the zero-fire wire directly from the distribution box for AC power supply.

[0004] However, in the actual use process, the type-c interface power supply needs to use an adapter to convert the commercial power into direct current to supply power to the modules inside the smart device. Therefore, only the current on the line can be detected by the current transformer, and the specific AC voltage cannot be detected, making it difficult to achieve power measurement and power sampling; while directly supplying power to the smart device through the zero-fire wire AC, although this method can achieve functions such as voltage, current, power sampling, and power metering, it requires wire-breaking treatment, which has a certain installation technical threshold and safety hazard. Summary of the Utility Model

[0005] This application aims to solve at least one of the technical problems existing in the related art.

[0006] To this end, the first aspect of this application is to propose an electrical parameter measurement device.

[0007] The second aspect of this application is to propose a power distribution cabinet.

[0008] In view of this, according to the first aspect of the present application, an electrical parameter measurement device is proposed, including: a current transformer for obtaining a current signal on the measured line, where the measured line uses alternating current; a plug assembly for inserting into a socket on the measured line to access the alternating current of the measured line; an electronic assembly disposed within the plug assembly; the electronic assembly includes an integrated AC-DC conversion module, a voltage acquisition module, a metering module, and a communication module; wherein, the AC-DC conversion module is used to convert alternating current into direct current; the voltage acquisition module is used to acquire the voltage signal of the measured line; the metering module is connected to the voltage acquisition module and the current transformer, and is used to receive the voltage signal and the current signal, and obtain the electrical parameters of the measured line according to the current signal and the voltage; the communication module is connected to the metering module, and is used to receive the electrical parameters output by the metering module and send the electrical parameters to the outside world.

[0009] In this technical solution, the current transformer is disposed on the measured line to obtain the current signal of the measured line. The plug assembly and the socket on the measured line are plugged and unplugged in cooperation to access the alternating current into the AC-DC conversion module. The AC-DC conversion module converts the accessed alternating current into direct current required for the operation of other modules of the electrical parameter measurement device; subsequently, the voltage acquisition module obtains the voltage on the measured line and converts it into a voltage signal required for metering by the metering module and transmits it to the metering module; the metering module calculates the electrical parameters of the measured line according to the current signal and the voltage signal; finally, the electrical parameters are sent to the outside world through the communication module.

[0010] Compared with the power supply method of breaking the line in the related technology, in this technical solution, the power is connected by the plug-and-play cooperation between the plug assembly and the socket on the measured line, which does not require complex line-breaking processing, greatly simplifies the installation and disassembly process, and reduces the safety risk caused by improper operation; at the same time, the electrical parameter measurement device provided in the above embodiment is in direct contact with the alternating current. With such a design, voltage detection and current detection can be performed simultaneously, so that comprehensive metering of current, voltage, frequency, power, and electric energy can be realized, thereby improving the comprehensive performance of the electrical parameter measurement device.

[0011] In some technical solutions, optionally, the AC-DC conversion module includes an AC / DC conversion unit and a voltage stabilization unit; the voltage stabilization unit is connected to the AC / DC conversion unit.

[0012] In practical applications, the output end of the voltage stabilization unit is connected to the metering module and the communication module, so as to output stable direct current to the metering module and the communication module to ensure the normal operation of the metering module and the communication module.

[0013] In some technical solutions, optionally, the voltage output by the AC / DC conversion unit is higher than the voltage output by the voltage stabilization unit.

[0014] In some technical solutions, optionally, the voltage output by the AC / DC conversion unit is 5V, and the voltage output by the voltage stabilization unit is 3.3V.

[0015] In this technical solution, specifically, the AC / DC conversion unit converts the input alternating current into 5V direct current, and the voltage stabilization unit steps down the 5V direct current to obtain 3.3V direct current. The voltage value of 5V is the standard operating voltage of many electronic components and integrated circuits. It can not only meet the power supply requirements of many components but also prevent component damage caused by excessive voltage. Further, the voltage stabilization unit steps down the 5V direct current to 3.3V, which can further ensure the normal operation of the metering module and the communication module, thus improving the overall performance and reliability of the device.

[0016] In some technical solutions, optionally, the electrical parameter metering device further includes an interface terminal, which is arranged on the plug assembly and connected between the current transformer and the metering module.

[0017] In this technical solution, the electronic parameter metering device further includes an interface terminal, which is arranged on the plug assembly and connected between the current transformer and the metering module, so that the current signal of the current transformer is transmitted to the metering module through the interface terminal. The connection through the interface terminal has a simple structure and strong versatility.

[0018] In this technical solution, specifically, the metering module can calculate the power information according to P = U×I, that is, the power (P) is the product of the voltage (U) and the current (I). The metering module also has a voltage zero-crossing detection function and an electric energy pulse metering function. Since the voltage waveform is periodic, when the voltage waveform transitions from the positive half-cycle to the negative half-cycle (or from the negative half-cycle to the positive half-cycle), it will pass through the zero point. Therefore, the metering module can calculate the voltage period by detecting the time intervals of these voltage zero-crossing points, and then obtain the frequency information. And the electric energy (W) = power (P) × t (time). Therefore, the metering module integrates the active instantaneous power over time through the electric energy pulse metering function, so as to calculate the active energy and achieve electric energy metering.

[0019] In some technical solutions, optionally, the plug assembly includes: a base; a plug head, mounted on one side of the base; pins, provided on the side of the plug head facing away from the base; wherein, the electronic components are installed in the base.

[0020] In this technical solution, through the plug-and-play cooperation between the plug assembly and the socket of the circuit under test, the alternating current of the circuit under test can be quickly accessed, greatly improving the convenience of operation. Moreover, when not in use, the plug assembly can be pulled out from the socket. At the same time, the electronic components are installed in the base body, forming an effective protective barrier for the electronic components, which can avoid the influence of the outside world on the electronic components, thereby ensuring the stability and reliability of the electronic components.

[0021] In some technical solutions, optionally, the plug assembly further includes a guiding member; the guiding member is disposed on the plug head.

[0022] In this technical solution, by providing the guiding member, it is ensured that the plug assembly can be correctly aligned and positioned when inserted into the socket or other interfaces, preventing poor electrical connection or damage caused by incorrect insertion direction or position deviation. The design of the guiding member can simplify the plugging process, improve the plugging efficiency, and also play a role in preventing the plug assembly from accidentally falling off after insertion.

[0023] In some technical solutions, optionally, the guiding member includes a groove and / or the guiding member includes a boss; the guiding member is disposed on the circumferential side surface of the plug head.

[0024] In this technical solution, the guiding member includes a boss and / or a groove. The guiding member is disposed on the circumferential side surface of the plug head and is evenly spaced along the circumferential side surface. Correspondingly, the socket that cooperates with the plug assembly is provided with corresponding bosses and / or grooves. Through the cooperation of the bosses and grooves, the plug assembly and the socket are tightly fitted.

[0025] According to the second aspect of the present application, the present application provides a power distribution cabinet, including a socket and the electrical parameter measurement device proposed in any of the above technical solutions; wherein, the plug connector is pluggable and cooperative with the socket. Thus, the power distribution cabinet has all the beneficial effects disclosed in any of the above embodiments, which will not be elaborated here.

[0026] The additional aspects and advantages of the present application will become apparent in the following description section, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0028] Figure 1 Shows a schematic structural diagram of an intelligent CT in the related art;

[0029] Figure 2 Shows a structural block diagram of the electrical parameter measurement device in the embodiment of the present application;

[0030] Figure 3One of the three-dimensional structural schematic diagrams of the electrical parameter metering device in the embodiment of the present application is shown;

[0031] Figure 4 Another three-dimensional structural schematic diagram of the electrical parameter metering device in the embodiment of the present application is shown;

[0032] Among them, Figure 1 The corresponding relationship between the reference numerals and the component names is as follows:

[0033] 100'-Wired current transformer; 200'-Metering module; 300'-Wifi communication;

[0034] Figures 2 to 4 The corresponding relationship between the reference numerals and the component names in [Figure] is as follows:

[0035] 10 - Electrical parameter metering device; 100 - Current transformer; 200 - Plug assembly; 210 - Substrate; 220 - Plug head; 230 - Pin; 240 - Guide; 241 - Boss; 242 - Groove; 300 - Electronic component; 310 - AC / DC conversion module; 311 - AC / DC conversion unit; 312 - Voltage stabilization unit; 320 - Voltage acquisition module; 330 - Metering module; 340 - Communication module; 350 - Uart; 400 - Measured line; 500 - Interface terminal. Detailed implementation manners

[0036] In order to more clearly understand the above objects, features and advantages of the present application, the present application will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0037] In the following description, many specific details are set forth in order to fully understand the present application. However, the present application may be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited to the limitations of the specific embodiments disclosed below.

[0038] The following combines Figures 2 to 4 , and through specific embodiments and their application scenarios, the electrical parameter metering device and power distribution cabinet provided by the embodiments of the present application are described in detail.

[0039] Referring to Figure 2 and Figure 3 , in some embodiments of the present application, an electrical parameter metering device 10 is disclosed, and its structure includes a current transformer 100, a plug assembly 200 and an electronic component 300.

[0040] Specifically, the current transformer 100 is used to obtain the current signal on the measured line 400, and the measured line uses alternating current. The plug assembly 200 is used to insert into the socket on the measured line 400 to access the alternating current of the measured line 400; the electronic assembly 300 includes an integrated AC-DC conversion module 310, a voltage acquisition module 320, a metering module 330, and a communication module 340; wherein, the AC-DC conversion module 310 is used to convert the alternating current into direct current required for the operation of other modules; the voltage acquisition module 320 is used to acquire the voltage signal of the measured line 400; the metering module 330 is connected to the voltage acquisition module 320 and the current transformer 100, and is used to receive the voltage signal and the current signal, and calculate the electrical parameters of the measured line 400 according to the voltage signal and the current signal; the communication module 340 is connected to the metering module 330, and is used to receive the electrical parameters output by the metering module 330 and send the electrical parameters to the outside world.

[0041] In the above embodiment, the current transformer 100 is arranged on the measured line 400 to obtain the current signal of the measured line 400. The plug assembly 200 and the socket on the measured line 400 are plugged and unplugged in cooperation, so as to access the alternating current into the AC-DC conversion module 310. The AC-DC conversion module 310 converts the accessed alternating current into direct current required for the operation of other modules of the electrical parameter metering device 10; subsequently, the voltage acquisition module 320 obtains the voltage on the measured line and converts it into a voltage signal required for metering by the metering module 330 and transmits it to the metering module 330; the metering module 330 calculates the electrical parameters of the measured line according to the current signal and the voltage signal; finally, the electrical parameters are sent to the outside world through the communication module 340.

[0042] Compared with the power supply method of breaking the line in the related technology, in the above embodiment, the power is connected by the plug-and-play cooperation between the plug assembly 200 and the socket on the measured line 400, which does not require complex line-breaking processing, greatly simplifies the installation and disassembly process, and reduces the safety risk caused by improper operation; at the same time, the electrical parameter metering device 10 provided in the above embodiment is directly in contact with the alternating current, that is, the alternating current is directly input into the AC-DC conversion module 310 (refer to Figure 2 , AC input, alternating current input); such a design can perform voltage detection and current detection at the same time, thereby realizing comprehensive metering of current, voltage, frequency, power, and electric energy, and improving the comprehensive performance of the electrical parameter metering device.

[0043] In the above embodiment, the voltage acquisition module 320 uses the method of resistor voltage division sampling to collect the voltage signal.

[0044] In some embodiments, the electrical parameters include at least one of voltage information, current information, power information, electric energy information, and frequency information.

[0045] Specifically, the metering module 330 can calculate the power information according to P = U×I, that is, the power (P) is the product of the voltage (U) and the current (I). The metering module 330 also has a function of detecting the zero-crossing of the voltage and a function of metering the electric energy pulse. Since the voltage waveform is periodic, when the voltage waveform transitions from the positive half-cycle to the negative half-cycle (or from the negative half-cycle to the positive half-cycle), it will pass through the zero point. Therefore, the metering module 330 can calculate the period of the voltage by detecting the time intervals of these voltage zero-crossing points, and then obtain the frequency information. And the electric energy is the product of the power and the time, that is, W (electric energy) = P (power) × t (time). Therefore, the metering module 330 integrates the active instantaneous power over time through the electric energy pulse metering function, so as to calculate the active energy and realize the electric energy metering.

[0046] In some embodiments, specifically, the communication module 340 adopts WiFi communication. It can be understood that the communication module 340 can also adopt other wireless communication technologies (such as Bluetooth, etc.) or wired communication technologies (such as Ethernet, etc.), and this embodiment is not limited thereto. In actual use, by sharing and synchronizing data through the communication module 340 and the outside world, users can remotely monitor and control the status and behavior of the electrical parameter metering device 10, which is beneficial to improving the application range of the electrical parameter metering device 10.

[0047] In some embodiments, the AC / DC conversion module 310 includes an AC / DC (Alternating Current / Direct Current) conversion unit 311 and a voltage stabilizing unit 312. Among them, the voltage stabilizing unit 312 is connected to the AC / DC conversion unit 311.

[0048] In actual application, the output end of the voltage stabilizing unit 312 is connected to the metering module 330 and the communication module 340, so as to output stable direct current to the metering module 330 and the communication module 340 to ensure the normal operation of the metering module 330 and the communication module 340.

[0049] In the above embodiments, the voltage output by the AC / DC conversion unit 311 is higher than the voltage output by the voltage stabilizing unit 312. Specifically, the AC / DC conversion unit 311 converts the input alternating current into 5V direct current, and the voltage stabilizing unit 312 steps down the 5V direct current to obtain 3.3V direct current. This voltage value of 5V is the standard operating voltage of many electronic components and integrated circuits. It can not only meet the power supply requirements of many components, but also prevent component damage due to excessive voltage. Further, the voltage stabilizing unit 312 steps down the 5V direct current to 3.3V, which can further ensure the normal operation of the metering module 330 and the communication module 340, thereby improving the overall performance and reliability of the device.

[0050] In some embodiments, the electrical parameter metering device 10 further includes an interface terminal 500. The interface terminal 500 is disposed on the plug assembly 200 and is connected between the current transformer 100 and the metering module 330, so that the current signal of the current transformer 100 is transmitted to the metering module 330 through the interface terminal 500. By connecting through the interface terminal 500, this connection method has a simple structure and strong versatility.

[0051] In practical applications, the interface terminal 500 has two pins.

[0052] In some embodiments, the communication module 340 and the metering module 330 are connected bidirectionally to achieve efficient data transmission and control instruction exchange. Through bidirectional communication, the accuracy of the transmitted electrical parameters can be ensured.

[0053] Exemplarily, the communication module 340 and the metering module 330 are connected bidirectionally through Uart350 (Universal Asynchronous Receiver / Transmitter).

[0054] Refer to Figure 3 and Figure 4 In some embodiments, the plug assembly 200 includes a base body 210, a plug head 220, and pins 230. The plug head 220 is disposed on one side of the base body 210, and the pins 230 are disposed on the side of the plug head 220 away from the base body 210. Among them, the electronic component 300 is installed inside the base body 210.

[0055] In the above embodiments, through the plug-and-play cooperation between the plug assembly 200 and the socket of the measured line 400, the alternating current of the measured line 400 can be quickly accessed, greatly improving the operation convenience. And when not in use, the plug assembly 200 can be pulled out from the socket. At the same time, by installing the electronic component 300 inside the base body 210, an effective protection barrier is formed for the electronic component 300, which can avoid the influence of the outside world on the electronic component 300, thereby ensuring the stability and reliability of the electronic component 300.

[0056] In some embodiments, the plug assembly 200 further includes a guide member 240. The guide member 240 is disposed on the plug head 220. By providing the guide member 240, it is ensured that the plug assembly 200 can be correctly aligned and positioned when inserted into a socket or other interface, preventing poor electrical connection or damage caused by incorrect insertion direction or position deviation. The design of the guide member 240 can simplify the plugging process, improve the plugging efficiency, and also play a role in preventing the plug assembly 200 from accidentally falling off after insertion.

[0057] In the above embodiments, the guiding member 240 includes a boss 241 and / or a groove 242. The guiding member 240 is disposed on the circumferential side surface of the plug head portion 220 and is evenly spaced along the circumferential side surface. Correspondingly, the socket that mates with the plug assembly 200 is provided with corresponding bosses and / or grooves. Through the cooperation of the bosses and grooves, the plug connecting assembly 200 and the socket are tightly fitted together.

[0058] According to a second aspect of the present application, the present application further provides a power distribution cabinet. The power distribution cabinet includes a socket and the electrical parameter measuring device 10 provided in any of the above embodiments, wherein the plug assembly 200 and the socket are pluggable and mating. Thus, the power distribution cabinet has all the beneficial effects disclosed in any of the above embodiments, which will not be elaborated herein.

[0059] It should be clear that in the claims, the specification and the drawings of the present application, the term "a plurality" means two or more, unless there is an additional explicit limitation. The orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, and is only for more conveniently describing the present application and making the description process simpler, rather than indicating or implying that the device or element referred to must have the specific orientation, be constructed and operated in the specific orientation. Therefore, these descriptions should not be construed as limiting the present application; terms such as "connection", "installation", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, or a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances of the above data.

[0060] In the claims, the specification and the drawings of the present application, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the claims, the specification and the drawings of the present application, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0061] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electrical parameter measurement device, characterized in that, Comprising: A current transformer for obtaining a current signal on a measured line, where the measured line uses alternating current; A plug assembly for inserting into a socket on the measured line to access the alternating current of the measured line; An electronic component disposed within the plug assembly; the electronic component includes an integrated AC-DC conversion module, a voltage acquisition module, a metering module, and a communication module; Wherein, the AC-DC conversion module is used to convert alternating current into direct current; The voltage acquisition module is used to acquire the voltage signal of the measured line; The metering module is connected to the voltage acquisition module and the current transformer, and is used to receive the voltage signal and the current signal, and obtain the electrical parameters of the measured line according to the current signal and the voltage signal; The communication module is connected to the metering module, and is used to receive the electrical parameters output by the metering module and send the electrical parameters to the outside.

2. The electrical parameter measurement device according to claim 1, characterized in that The AC-DC conversion module includes an AC / DC conversion unit and a voltage stabilizing unit; the voltage stabilizing unit is connected to the AC / DC conversion unit.

3. The electrical parameter metering device according to claim 2, characterized in that, The voltage output by the AC / DC conversion unit is higher than the voltage output by the voltage stabilizing unit.

4. The electrical parameter metering device according to claim 3, characterized in that, The voltage output by the AC / DC conversion unit is 5V, and the voltage output by the voltage stabilizing unit is 3.3V.

5. The electrical parameter metering device according to claim 1, characterized in that, The electrical parameter metering device further includes an interface terminal disposed on the plug assembly and connected between the current transformer and the metering module.

6. The electrical parameter metering device according to claim 1, characterized in that, The electrical parameters include at least one of voltage information, current information, power information, electrical energy information, and frequency information.

7. The electrical parameter metering device according to any one of claims 1 to 6, characterized in that The plug assembly includes: A base; A plug head installed on one side of the base; A pin disposed on the side of the plug head facing away from the base; Wherein, the electronic component is installed within the base.

8. The electrical parameter metering device according to claim 7, characterized in that, The plug assembly further includes a guiding member; the guiding member is disposed on the plug head.

9. The electrical parameter metering device according to claim 8, characterized in that, The guiding member includes a groove and / or a protrusion; The guiding member is disposed on the circumferential side surface of the plug head.

10. A power distribution cabinet, characterized in that, Comprising a socket and the electrical parameter metering device according to any one of claims 1 to 9; Wherein, the plug assembly and the socket are in pluggable and unplugable cooperation.

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