Electric meter

Abstract

The utility model provides an electricity meter. The electricity meter comprises a strong current port; the electric quantity acquisition module is connected with the strong current port and is used for acquiring an electric signal accessed from the strong current port to obtain an electric parameter; the main control module is connected with the electric quantity acquisition module, and the main control module at least obtains the electric parameters from the electric quantity acquisition module and calculates electric quantity information; one end of the isolation module is connected with the main control module; the communication module is connected with the other end of the isolation module; the power supply module supplies power to the electric quantity acquisition module, the main control module, the isolation module and the communication module based on the electric signals; wherein the main control module at least sends electric quantity information to the outside through the communication module, and the isolation module realizes electrical isolation between the main control module and the communication module. The use safety of the electric meter can be improved.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to an electric meter. Background Art

[0002] At present, the electric meters on the market mainly use on-board antennas, and the electric meters are placed inside the distribution box. However, most distribution boxes are made of metal, which shields the antenna and affects the transmission of the signal of the wireless communication module, resulting in poor signal quality, short transmission distance, transmission delay and other problems. In order to solve the impact of the distribution box on the antenna, the antenna needs to be installed outside the distribution box. As the electric meter is a strong power terminal, if the antenna, which is the end that can be touched by the human body, is directly installed outside the distribution box, there will be safety hazards and it will not meet the safety requirements. Utility Model Content

[0003] The present application provides an electric meter, which can improve the safety of use of the electric meter.

[0004] To solve the above technical problems, the present application provides an electric meter, which includes: a high-power port; a power collection module, which is connected to the high-power port and collects the electrical signals connected from the high-power port to obtain electrical parameters; a main control module, which is connected to the power collection module, and the main control module at least obtains the electrical parameters from the power collection module and calculates the power information; an isolation module, one end of which is connected to the main control module; a communication module, which is connected to the other end of the isolation module; a power supply module, which supplies power to the power collection module, the main control module, the isolation module and the communication module based on the electrical signals; wherein the main control module at least sends the power information to the outside through the communication module, and the isolation module realizes the electrical isolation between the main control module and the communication module.

[0005] Among them, the isolation module includes: a first isolation module, one end of which is connected to the main control module; the communication module includes: a wireless communication module, which is connected to the other end of the first isolation module; wherein the main control module sends at least power information to the outside through the wireless communication module, and the first isolation module realizes electrical isolation between the main control module and the wireless communication module.

[0006] Wherein, the first isolation module includes: a magnetic isolation communication interface, which is connected to the main control module and the wireless communication module respectively.

[0007] Among them, the isolation module includes: a second isolation module, one end of which is connected to the main control module; the communication module includes: a wired communication module, which is connected to the other end of the second isolation module; wherein the main control module sends at least power information to the outside through the wired communication module, and the second isolation module realizes electrical isolation between the main control module and the wired communication module.

[0008] Wherein, the second isolation module includes: a capacitive isolation communication interface, which is connected to the main control module and the wired communication module respectively.

[0009] Among them, the electric meter also includes a power supply module, which is respectively connected to the high-voltage port, the power collection module, the main control module, the isolation module and the communication module, and supplies power to the power collection module, the main control module, the isolation module and the communication module based on the electrical signal; wherein the electrical signal includes an AC signal, and the power supply module includes a rectifier circuit, a first step-down circuit, a DC isolation circuit and a second step-down circuit. The rectifier circuit is connected to the high-voltage port and converts the AC signal into a DC signal; the first step-down circuit is respectively connected to the rectifier circuit, the power collection module, the main control module and the isolation module, and supplies the DC signal to the power collection module, the main control module and the isolation module after step-down processing; the DC isolation circuit is connected to the rectifier circuit to perform DCDC isolation on the DC signal; the second step-down circuit is respectively connected to the DC isolation circuit, the communication module and the isolation module, and supplies the communication module and the isolation module after step-down processing on the DC signal after DCDC isolation.

[0010] Among them, the power acquisition module includes a voltage acquisition circuit, a current acquisition circuit, and a power metering circuit. The voltage acquisition circuit is connected to the high-voltage port and obtains the voltage information of the electrical signal; the current acquisition circuit is connected to the high-voltage port and obtains the current information of the electrical signal; the power metering circuit is respectively connected to the voltage acquisition circuit, the current acquisition circuit and the main control module; wherein the power metering circuit transmits the voltage information and the current information to the main control module, and / or obtains the power information based on the current information and the voltage information, and transmits the power information to the main control module.

[0011] Among them, the wireless communication module includes a communication circuit, an interface component, and an antenna. The communication circuit is connected to the isolation module; the interface component is connected to the communication circuit; the antenna is plugged into the interface component; wherein the interface component includes a shielded wire and an adapter, one end of the shielded wire is connected to the communication circuit; one end of the adapter is provided with a plug hole, the antenna is plugged into the plug hole, and the other end of the adapter is connected to the other end of the shielded wire.

[0012] Among them, the adapter includes an adapter part and an installation part. The adapter part extends along a first direction, and one end is connected to the shielded wire, and the other end is provided with a plug hole; the installation part extends from one end of the adapter part toward a second direction, and the second direction is perpendicular to the first direction.

[0013] The electric meter further comprises a box body, which forms an installation cavity, a high-voltage port is arranged on the box body, and a power collection module, a main control module, an isolation module, a communication circuit, and an interface component are all arranged in the installation cavity; when the antenna is an L-shaped short-rod antenna, the L-shaped short-rod antenna is also arranged in the installation cavity; when the antenna is a long antenna, the electric meter further comprises a suction cup; one end of the antenna is arranged in the installation cavity and is connected to the interface component, and the other end of the antenna is arranged outside the box body and is installed on the outer wall of the box body through the suction cup.

[0014] The beneficial effects of the present application are as follows: the electric meter provided by the present application electrically isolates the main control module at the strong-electric end from the communication module through the isolation module, so that the communication module can be at the weak-electric end, meet the safety requirements, and improve the safety of the electric meter; and the present application can make the communication module meet the safety requirements by setting the isolation module inside the electric meter, without setting an additional insulation mechanism or isolation mechanism at the communication module end, so as to reduce the overall size of the electric meter; in addition, the present application can obtain electrical parameters from the electric power acquisition module and calculate the electric power information through the main control module, and at least send the electric power information to the outside through the communication module, so as to facilitate the accurate acquisition of electric power information and communication with the external system, which is convenient for users to use. Therefore, the present application can improve the safety and convenience of the electric meter, and reduce the size. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0016] Figure 1 It is a structural schematic diagram of an embodiment of an electric meter of the present application;

[0017] Figure 2 It is a structural diagram of an embodiment of a main control module, a first isolation module and a wireless communication module in the electric meter of the present application;

[0018] Figure 3 It is a structural schematic diagram of an embodiment of a main control module, a second isolation module and a wired communication module in the electric meter of the present application;

[0019] Figure 4 It is a structural schematic diagram of an embodiment of a power supply module in the electric meter of the present application;

[0020] Figure 5 It is a structural schematic diagram of an embodiment of an electric meter power collection module of the present application;

[0021] Figure 6 It is a structural diagram of an embodiment of an interface component in an electric meter of the present application;

[0022] Figure 7 yes Figure 6 A schematic side view of an embodiment interface assembly;

[0023] Figure 8 It is a structural schematic diagram of an embodiment of an antenna in an electric meter of the present application;

[0024] Fig. 9 yes Figure 8A schematic diagram of a side view of an antenna in an embodiment. DETAILED DESCRIPTION

[0025] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0026] The terms "first", "second" and the like in this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. It should be understood that when used in this specification and the appended claims, the term "including" indicates the presence of the described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections. It should also be understood that the terms used in this specification of the application are only for the purpose of describing a specific embodiment and are not intended to limit the application. As used in this specification of the application and the appended claims, unless the context clearly indicates otherwise, the singular forms of "one", "an" and "the" are intended to include plural forms. It should also be further understood that the term "and / or" used in this specification of the application and the appended claims refers to any combination of one or more of the items listed in association and all possible combinations, and includes these combinations.

[0027] As used in this specification and the appended claims, the term "if" may be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if [described condition or event] is detected" may be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0028] It should be noted that when a certain element is fixed to another element, it includes directly fixing the element to the other element, or fixing the element to the other element through at least one other element in the middle. When an element is connected to another element, it includes directly connecting the element to the other element, or connecting the element to the other element through at least one other element in the middle.

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] The present application proposes an electric meter, which may be a smart electric meter, such as Figures 1 to 9 As shown, the electric meter includes a strong power port 01, a power acquisition module 02, a main control module 03, an isolation module 04, a communication module 05, and a power supply module 06; the power acquisition module 02 is connected to the strong power port 01, and the electric signal connected from the strong power port 01 is collected to obtain electric parameters; the main control module 03 is connected to the power acquisition module 02, and the main control module 03 obtains the electric parameters from at least the power acquisition module 02 and calculates the power information; one end of the isolation module 04 is connected to the main control module 03; the communication module 05 is connected to the other end of the isolation module 04, and the main control module 03 sends information to the outside through the communication module 05, such as sending power information, and the isolation module 04 realizes electrical isolation between the main control module 03 and the communication module 05, and the power supply module 06 supplies power to the power acquisition module 02, the main control module 03, the isolation module 04 and the communication module 05 based on the electric signal.

[0031] The electric meter is an instrument used to measure electric energy. The electric meter collects the electric signal from the strong power port 01 through the power acquisition module 02, and then obtains the electric parameters, wherein the electric parameters include at least one of current, voltage or electric power. The main control module 03 can at least obtain the electric parameters from the power acquisition module 02 and calculate the electric power information; the isolation module 04 can ensure that the main control module 03 and the communication module 05 can realize the electrical isolation between the main control module 03 at the strong power end and the communication module 05 at the weak power end while realizing data transmission, so that the communication module 05 can be placed in the safe end area, meet the safety requirements, and improve the safety of the use of the electric meter; the main control module can send the electric power information to the outside through the communication module 05, for example, to a third-party device or an external system such as the Internet, so as to facilitate the electric meter to communicate with the outside world and make the electric meter more intelligent.

[0032] Optionally, the power supply module 06 is respectively connected to the high-power port 01, the power collection module 02, the main control module 03, the isolation module 04 and the communication module 05, and the power supply module 06 supplies power to the power collection module 02, the main control module 03, the isolation module 04 and the communication module 05 based on the electrical signal.

[0033] Optionally, the electric meter can also receive external information through the communication module 05 to communicate with external systems such as third-party equipment, without specific limitation.

[0034] The beneficial effect of the above arrangement is that the electric meter of this embodiment electrically isolates the main control module of the strong power end from the communication module 05 through the isolation module 04, so that the communication module 05 can be at the weak power end, meet the safety requirements, and improve the safety of the electric meter; and this embodiment can make the communication module 05 meet the safety requirements by setting the isolation module 04 inside the electric meter, without setting an additional insulation mechanism or isolation mechanism at the end of the communication module 05, so as to reduce the overall size of the electric meter; further, this embodiment can obtain electrical parameters from the power acquisition module 02 and calculate the power information through the main control module 03, and at least send the power information to the outside through the communication module 05, so as to facilitate the accurate acquisition of power information and communication with the external system, which is convenient for users to use. Therefore, this embodiment can improve the safety and convenience of the electric meter, and reduce the size.

[0035] Optionally, the isolation module 04 includes a first isolation module, one end of which is connected to the main control module 03; the communication module 05 includes a wireless communication module 51, which is connected to the other end of the first isolation module, wherein the main control module 03 sends at least power information to the outside through the wireless communication module 05, and the first isolation module realizes electrical isolation between the main control module 03 and the wireless communication module 05.

[0036] By sending power information through the wireless communication module 51, the electric meter can perform wireless long-distance communication, which can reduce the structural complexity of the electric meter, reduce the number of components, and eliminate the need to lay a complex wired network. The installation is simple, saving construction costs and time. Moreover, by using the wireless communication module 51 to send power information, the transmission speed is fast, which can reduce the risk of reduced data collection accuracy due to external interference such as line aging, thereby improving the reliability of the electric meter.

[0037] Optionally, the first isolation module includes a magnetic isolation communication interface 41, which is respectively connected to the main control module 03 and the wireless communication module 51. The magnetic isolation communication interface 41 is used to realize communication and signal interaction between the main control module 03 and the wireless communication module 51.

[0038] In an application scenario, such as Figure 1 and Figure 2As shown, the main control module 03 includes a microprocessor 31, which is at least provided with a first signal sending terminal, a first signal receiving terminal, a first wake-up terminal, a second wake-up terminal, a reset terminal, a status terminal and a power supply terminal; and the wireless communication module 51 is provided with a first pair of terminals corresponding to the above terminals, and the magnetic isolation communication interface 41 is provided with multiple groups of isolation coupling coils (or transformer isolators), each group of isolation coupling coils is respectively connected to the terminals of the microprocessor 31 and the corresponding first pair of terminals, so as to couple and isolate the corresponding signals to achieve signal transmission and electrical isolation. The power supply terminal of the microprocessor 31 is connected to the power supply module 06.

[0039] Among them, the microprocessor 31 can send a serial communication sending signal TX such as power information to the wireless communication module 51 through the first signal sending terminal; the microprocessor 31 can receive the receiving signal RX sent back by the wireless communication module 51 through the first signal receiving terminal, such as the user's setting information for the microprocessor 31; the microprocessor 31 can send a wake-up module signal to the wireless communication module 51 through the first wake-up terminal to wake up the wireless communication module 51; the microprocessor 31 can receive the wake-up microprocessor signal sent back by the wireless communication module 51 through the second wake-up terminal to wake up the microprocessor 31 through the wireless communication module 51; the microprocessor 31 can send a reset module signal to the wireless communication module 51 through the reset terminal to control the reset of the wireless communication module 51; the microprocessor 31 can receive the module status bit signal sent back by the wireless communication module 51 through the status bit terminal to obtain the status information of the wireless communication module 51.

[0040] By connecting to the main control module 03 and the wireless communication module 51 respectively through the magnetic isolation communication interface 41, electrical isolation and communication interaction between the main control module 03 and the wireless communication module 51 can be achieved, which can effectively reduce the interference to the wireless communication module 51, achieve better electrical isolation effect, and improve the communication reliability of the communication module 05.

[0041] In other embodiments, different signals may also share terminals. For example, the first signal sending terminal may be used to send a wake-up module signal and a serial communication sending signal TX such as power information, and the first signal receiving terminal may receive a receiving signal RX and a wake-up microprocessor signal returned by the wireless communication module 51.

[0042] In other embodiments, the first isolation module may also be other isolation communication interfaces such as a capacitive isolation communication interface, a photoelectric isolation communication interface, and a relay isolation interface.

[0043] Optionally, the isolation module 04 also includes a second isolation module, one end of which is connected to the main control module 03; the communication module 05 includes a wired communication module 52, which is connected to the other end of the second isolation module, wherein the main control module 03 at least sends information to the outside through the wired communication module 52, such as sending power information, and the second isolation module realizes electrical isolation between the main control module 03 and the wired communication module 52.

[0044] The wired communication module 52 is used to communicate with external systems such as third-party devices. For example, data is transmitted through a dedicated power line. The signal has high stability and strong anti-interference performance and is not easily affected by other wireless devices or external wireless signal sources.

[0045] Optionally, the isolation module 04 may include a first isolation module and a second isolation module, the communication module 05 includes a wired communication module 52 and a wireless communication module 51, the first isolation module realizes electrical isolation between the main control module 03 and the wireless communication module 51, and the second isolation module realizes electrical isolation between the main control module 03 and the wired communication module 52.

[0046] This setting can achieve redundant backup and improve the reliability of the electric meter. Specifically, by configuring the dual communication mode, when one communication mode fails or the effect does not meet the user's needs, the other communication mode can still ensure the normal transmission of data or meet the user's higher transmission needs, thereby improving the stability and reliability of the data acquisition system. Further, the flexibility and adaptability of the use of the electric meter can be improved. Specifically, under different environmental conditions, wired communication (such as RS485, power line carrier, etc.) is generally more suitable for local concentration, fixed network structure and stable electromagnetic environment, while wireless communication (such as 4G / 5G, etc.) can flexibly respond to remote monitoring, mobile device access or wiring difficulties, and is suitable for large-scale distributed deployment and temporary data collection needs. Further, the dual communication mode can optimize costs to a certain extent. For example, for newly built residential or commercial areas, the cost can be reduced by wired communication modules in the early stage, and as technology develops or user needs change, it can be upgraded through wireless communication modules 51 to avoid large-scale rewiring costs. In summary, the combination of wired communication module 52 and wireless communication module 51 can not only improve the reliability of electric meter data transmission, but also take into account the convenience of installation and the flexibility of later maintenance.

[0047] Optionally, the second isolation module includes a capacitive isolation communication interface 42, which is respectively connected to the main control module 03 and the wired communication module 52. The capacitive isolation communication interface 42 is used to realize communication and signal interaction between the main control module 03 and the wired communication module 52.

[0048] like Figure 1and Figure 3 As shown, the capacitive isolation communication interface 42 has a total of 3 channels, two of which are channels with the same transmission direction, and the other channel has a transmission direction opposite to the first two channels. As an isolation device, the capacitive isolation communication interface 42 electrically isolates the main control module 03 at the strong power end and the wired communication module 52 at the weak power end, realizing the communication function while ensuring that the wired communication module 52 is in the safe end area to meet safety regulations.

[0049] The main control module 03 includes a microprocessor 31, and the wired communication module 52 may include an RS485 transceiver or a serial communication protocol bus (Controller Area Network, CAN), etc. The microprocessor 31 is at least provided with a second signal sending terminal, a second signal receiving terminal, a transceiver control terminal, a signal receiving control terminal and a power supply terminal; and the RS485 transceiver is provided with a second opposite terminal corresponding to the second signal sending terminal, the second signal receiving terminal, and the transceiver control terminal, and the capacitive isolation communication interface 42 is provided with a plurality of isolation capacitors, each of which is respectively connected to a terminal of the microprocessor 31 and a corresponding second opposite terminal to couple and isolate the corresponding signal, so as to realize signal transmission and electrical isolation. The power supply terminal of the microprocessor 31 is connected to the power supply module 06.

[0050] Among them, the microprocessor 31 can send a serial communication sending signal TX such as power information to the RS485 transceiver through the second signal sending terminal; the microprocessor 31 can receive the receiving signal RX transmitted back by the RS485 transceiver through the second signal receiving terminal, such as the user's setting information for the microprocessor 31; the microprocessor 31 can send a signal receiving and sending control signal to the RS485 transceiver through the receiving and sending control terminal; the microprocessor 31 can send a signal receiving and sending control signal to the capacitive isolation communication interface 42 through the signal receiving control terminal to control whether the capacitive isolation communication interface 42 outputs the receiving signal RX.

[0051] In other embodiments, different signals may also share terminals. For example, the second sending terminal may be used to send a serial communication signal TX such as power information to the RS485 transceiver and to send a signal receiving and transmitting control signal to the RS485 transceiver.

[0052] By connecting the capacitive isolation communication interface 42 to the main control module 03 and the wired communication module 52 respectively, electrical isolation and communication interaction between the main control module 03 and the wired communication module 52 are achieved, which can effectively reduce the interference to the wired communication module 52, achieve better electrical isolation effect, reduce costs, and improve the communication reliability of the communication module 05.

[0053] Alternatively, if Figure 3As shown, the wired communication module 52 also includes a protection circuit, which includes TVS tubes TVS1, TVS2 and TVS3; the RS485 transceiver outputs differential signals A and B through the common-mode inductor L1, TVS1 is connected between the differential signal A output terminal and the differential signal output terminal B, TVS2 is connected between the differential signal A output terminal and the negative pole of the RS485 transceiver, and TVS3 is directly connected between the differential signal output terminal B and the negative pole of the RS485 transceiver. The TVS tubes TVS1, TVS2 and TVS3 are used to embed the voltage to prevent the RS-485 transceiver from being damaged by the high voltage generated when the RS-485 bus is disturbed by external interference (lightning strike, surge).

[0054] Optionally, the electrical signal comprises an alternating current signal, such as Figure 4 As shown, the power supply module 06 includes a rectifier circuit 61, a first step-down circuit 62, a DC isolation circuit 63, and a second step-down circuit 64. The rectifier circuit 61 is connected to the strong power port 01, and converts the AC signal connected by the strong power port 01 into a DC signal; the first step-down circuit 62 is connected to the rectifier circuit 61, the power acquisition module 02, the main control module 03, and the isolation module 04 respectively, and supplies the DC signal to the power acquisition module 02, the main control module 03, and the isolation module 04 after step-down processing; the DC isolation circuit 63 is connected to the rectifier circuit 61, and is used for DCDC isolation of the DC signal; the second step-down circuit 64 is connected to the DC isolation circuit 63, the communication module 05, and the isolation module 04 respectively, and is used to step-down the DC signal after DCDC isolation and supply it to the communication module 05 and the isolation module 04.

[0055] The rectifier circuit 61 can convert AC signals into DC signals, which is convenient for powering the power collection module 02, the main control module 03, the communication module 05, and the isolation module 04; the first step-down circuit 62 can step down the DC signal and supply it to the power collection module 02 and the main control module 03, and the end of the isolation module 04 connected to the main control module 03; the DC isolation circuit 63 can perform DCDC isolation on the DC signal, and transmit the isolated DC signal to the second step-down circuit 64, which steps down the DC signal and supplies it to the communication module 05, the isolation module 04 and the end of the communication module 05 connected to the communication module 05, so as to realize the power supply isolation between the power collection module 02 and the main control module 03, and the isolation module 04 at the strong power end and the power supply to the communication module 05 and the isolation module 04 at the weak power end, thereby improving safety.

[0056] In an application scenario, such as Figure 4As shown, the power supply module 06 also includes a filter circuit 611, the filter circuit 611 includes a common mode inductor L3, a safety capacitor CX1, and the AC signal is filtered after passing through the common mode inductor L3 and the safety capacitor CX1. The rectifier circuit 61 includes a rectifier bridge BD1 and a capacitor C1. The rectifier bridge BD1 is composed of four diodes. The rectifier circuit 61 performs full-wave rectification or half-wave rectification to convert the AC signal into a DC signal; the first step-down circuit may include a 5V to 3.3V step-down circuit; the power supply module 06 also includes an AC to DC step-down controller, a feedback circuit, a diode D1, an energy storage inductor L2, and a freewheeling Diode D2, capacitor C3, and AC to DC buck controller perform loop control through a feedback circuit to ensure stable voltage output, and further obtain low-voltage direct current through a 5V to 3.3V buck circuit, wherein the other end of the 5V to 3.3V buck circuit is connected to the strong power end of the power collection module 02, the main control module 03, and the isolation module 04, to realize power supply to the strong power end of the power collection module 02, the main control module 03, and the isolation module 04; the second buck circuit may, for example, include another 5V to 3.3V buck circuit to supply the stepped-down DC signal to the weak power end of the communication module 05 and the isolation module 04.

[0057] This setting can effectively isolate the power supply between the weak current end and the strong current end, thereby improving safety.

[0058] Alternatively, if Figure 2 , Figure 3 As shown, the strong current end of the isolation module 04 connected to the main control module 03 is connected to the first step-down circuit 62, and the first step-down circuit 62 supplies power to the strong current end of the isolation module 04. The weak current end of the isolation module 04 connected to the communication module 05 is connected to the second step-down circuit 64, and the second step-down circuit 64 supplies power to the weak current end of the isolation module 04.

[0059] Alternatively, if Figure 5 As shown, the power acquisition module 02 includes a voltage acquisition circuit 21, a current acquisition circuit 22, and a power metering circuit 23; the voltage acquisition circuit 21 is connected to the high-voltage port 01, and obtains voltage information of the electrical signal; the current acquisition circuit 22 is connected to the high-voltage port 01, and obtains current information of the electrical signal; the power metering circuit 23 is respectively connected to the voltage acquisition circuit 21, the current acquisition circuit 22 and the main control module 03; wherein the power metering circuit 23 transmits the voltage information and the current information to the main control module 03, and / or obtains the power information based on the current information and the voltage information, and transmits the power information to the main control module 03.

[0060] In one application scenario, the voltage acquisition circuit 21 includes a first phase voltage sampling circuit, a second phase voltage sampling circuit, and a third phase voltage sampling circuit, and performs sampling by means of multiple resistor voltage division. Figure 5Taking 5 resistor voltage division sampling as an example, in other embodiments, sampling can also be performed by a differential operational amplifier or a voltage transformer. The voltage acquisition circuit 21 provides the voltage information to the power metering circuit 23 (such as an electric energy metering chip) for calculation.

[0061] The current acquisition circuit 22 includes a first phase current sampling circuit, a second phase current sampling circuit, and a third phase current sampling circuit. Figure 5 As shown, current sampling can be performed through a mutual inductor, and in other embodiments, current sampling can also be performed through a sampling resistor. The current acquisition circuit 22 provides current information to the power metering circuit 23 (such as an electric energy metering chip) for calculation.

[0062] The energy metering chip can adopt the existing HT7312, and the energy metering chip can calculate the sampled voltage information and current information, and transmit the calculated value to the main control module 03. This solution includes two transmission methods, one is to directly transmit the calculated power information to the main control module 03 (such as a microprocessor) through the synchronous serial communication interface standard SPI (Serial Peripheral Interface, SPI) communication, and the other is to directly output the collected voltage information and current information to the main control module 03 (such as a microprocessor 31) through a fast SPI port (such as a high-speed signal port), and the main control module 03 (such as a microprocessor 31) performs the calculation.

[0063] The beneficial effect of the above arrangement is that it can effectively sample voltage information and current information, thereby improving sampling accuracy and the accuracy of power calculation.

[0064] Optionally, the main control module 03 includes a microprocessor 31 and a memory chip. The microprocessor 31 is connected to the memory chip, the power metering circuit 23, the isolation module 04, and the power supply module 06; the microprocessor 31 can realize data communication with the communication module 05 through the isolation module 04, and the memory chip is used to store data to improve the data security and stability of the microprocessor 31.

[0065] Optionally, the wireless communication module 51 includes a communication circuit, an interface component, and an antenna. The communication circuit is connected to the isolation module 04; the interface component is connected to the communication circuit; and the antenna is plugged into the interface component.

[0066] The communication circuit is connected to the isolation module 04, and the isolation module 04 realizes data communication and electrical isolation between the communication circuit and the main control module 03; the interface component is connected to the communication circuit, and the antenna is plugged into the interface component. The interface component can transmit the communication signal output by the communication circuit to the antenna, thereby realizing wireless communication, which can improve the stability and reliability of signal transmission.

[0067] In other embodiments, the wireless communication module may only include a communication circuit and an antenna, which is not specifically limited.

[0068] Alternatively, if Figure 6 and Figure 7 As shown, the interface assembly includes a shielded wire 71 and an adapter 72. One end of the shielded wire 71 is connected to the communication circuit; one end of the adapter 72 is provided with a plug hole, the antenna is plugged into the plug hole, and the other end of the adapter 72 is connected to the other end of the shielded wire.

[0069] The shielded wire 71 can improve the anti-interference performance of the wireless communication module 51 and reduce the loss of the communication signal during the transmission process. The adapter 72 has a plug hole at one end, which can not only facilitate the fixing of the antenna, but also establish a communication connection with the antenna. The structure is simple and the reliability of the interface component and the antenna is improved.

[0070] Optionally, the adapter 72 includes an adapter portion 721 and a mounting portion 722. The adapter portion 721 extends along a first direction, and one end is connected to the shielding wire 71, and the other end is provided with a plug hole; the mounting portion 722 extends from one end of the adapter portion 721 toward a second direction, and the second direction is perpendicular to the first direction.

[0071] The first direction is perpendicular to the second direction, that is, the extension direction of the adapter part 721 is perpendicular to the extension direction of the mounting part 722, which facilitates further reducing the size of the adapter; the mounting part 722 can be used to fix the adapter 72 to improve the position stability and reliability of the adapter 72; one end of the adapter part 721 is connected to the shielding wire 71, and the other end is provided with a plug hole, which facilitates the transmission of the communication signal from the shielding wire 71 to the antenna. The structure is simple and can reduce signal interference during the transmission process.

[0072] Alternatively, if Figure 8 and Fig. 9 As shown, the electric meter also includes a box body, an installation cavity is formed in the box body, a high-voltage port 01 is arranged on the box body, and a power collection module 02, a main control module 03, an isolation module 04, a communication circuit, and an interface component are all arranged in the installation cavity; wherein, when the antenna is an L-shaped short rod antenna, the L-shaped short rod antenna is also arranged in the installation cavity; wherein, when the antenna is a long antenna, the electric meter also includes a suction cup; one end of the antenna is arranged in the installation cavity and is connected to the interface component, and the other end of the antenna is arranged outside the box body and is installed on the outer wall of the box body through the suction cup.

[0073] The structural feature of the L-shaped short rod antenna is that it consists of a vertical section and a horizontal section, and the two sections are connected at a certain angle to form an "L" shape. This design enables the antenna to receive and transmit signals in multiple directions, thereby improving the performance of the antenna. The L-shaped short rod antenna usually has a wider bandwidth and higher radiation efficiency. It can operate in different frequency ranges and can effectively convert electromagnetic energy into radio frequency signals or convert radio frequency signals into electromagnetic energy; further, the L-shaped short rod antenna has a simple structure, is easy to manufacture and install, and has a relatively small size and weight, which can effectively reduce the space occupied, thereby reducing the size of the electric meter, and the antenna's transmission power and transmission range can meet basic usage requirements.

[0074] An installation cavity is formed in the box, which can effectively reduce the interference of the external environment to the power collection module 02, the main control module 03, the isolation module 04, the communication circuit, the interface components and the L-shaped short rod antenna, thereby improving the safety and reliability of the use of the electric meter.

[0075] Optionally, in another embodiment, the electric meter also includes a long antenna and a suction cup, and a box body, an installation cavity is formed in the box body, the high-voltage port 01 is arranged on the box body, and the power collection module 02, the main control module 03, the isolation module 04, the communication circuit, and the interface component are all arranged in the installation cavity; one end of the antenna is arranged in the installation cavity and connected to the interface component, and the other end of the antenna is arranged outside the box body and is installed on the outer wall of the box body through the suction cup.

[0076] By using a long antenna to set part of the antenna outside the box, the shielding effect of the box on the antenna can be reduced, and the signal quality of the wireless communication module 51 during signal transmission can be improved, such as increasing the signal transmission distance and reducing the transmission delay. Moreover, since the isolation module 04 can achieve electrical isolation between strong current and weak current between the main control module 03 and the wireless communication module 51, the safety of the use of the electric meter can be improved when "the antenna is set outside the box", and the safety requirements can be met. There is no need to set up additional insulation structures, and the structure is simple and the size is reduced.

[0077] By installing the antenna on the outer wall of the box through the suction cup, the position stability of the antenna can be improved, the use safety can be improved, and the installation of other equipment or items in the box can be not affected, thereby improving the integration and installation convenience of the electric meter. In other embodiments, the antenna can also be fixed by other means such as fixing buckles.

[0078] Connect a portion of the long antenna to the outside of the box to reduce or eliminate the impact of the box on the antenna signal reception and transmission, so as to maximize the antenna reception and transmission power and transmission range while meeting safety requirements.

[0079] Optionally, a magnet is provided on the suction cup, and the antenna can be fixed to the box by magnetic attraction.

[0080] Optionally, the antenna can be directly connected to the interface component and all of it can be set in the installation cavity, or a long antenna can be used and part of the long antenna can be extended outside the box. Users can choose the location of the antenna as needed based on usage needs, which can improve the multi-scenario applicability and flexibility of the meter and improve safety of use.

[0081] Optionally, the size of the adapter 72 along the second direction may be, for example, 13.1 mm, the size along the first direction may be, for example, 16 mm, and the size along the third direction may be, for example, 6 mm. The third direction is perpendicular to the first direction and the second direction, respectively, the first direction is the extension direction of the adapter portion 721, and the second direction is the extension direction of the mounting portion 722.

[0082] In other embodiments, the dimension of the adapter along the first direction may also be 15.5-16.5 mm (eg, 15.5, 15.8, 16.1, 16.5, etc.).

[0083] The size of the adapter along the vertical direction, the size along the first direction, or the size along the second direction can be adjusted according to actual use requirements, and there is no specific limitation. The adapter 72 can be used to fix the antenna. Selecting adapters 72 of these sizes can ensure that the size of the adapter 72 does not exceed the size of the overall structure of the meter, thereby improving the integration of the meter and reducing the space volume occupied by the overall structure of the meter.

[0084] Alternatively, if Figure 8 As shown, the size of the L-shaped short rod antenna along the first direction can be, for example, 17.5 mm, the size along the second direction perpendicular to the first direction can be, for example, 28 mm, and the size along the third direction can be, for example, 8.2 mm, wherein the third direction is perpendicular to both the first direction and the second direction. The first direction is the extension direction of the adapter 721, and the second direction is the extension direction of the mounting portion 722, that is, the L-shaped short rod antenna can be plugged into the plug hole of the adapter 721 along the first direction.

[0085] In other embodiments, the size of the L-shaped short rod antenna along the first direction can also be 17-18 mm (for example, 17, 17.3, 17.8, 17.99, 18, etc.), the size along the second direction perpendicular to the first direction can also be 27-29 mm (for example, 27, 27.3, 27.8, 27.9, 28.4, 28.6, 29, etc.), and the size along the third direction can also be 8-8.4 mm (for example, 8, 8.21, 8.3, 8.4, etc.).

[0086] The size of the antenna along the vertical direction, the size along the first direction, or the size along the second direction may be adjusted according to actual use requirements, and the ratio of the three may also be adjusted, without specific limitation.

[0087] Optionally, the shielding wire 71 extends along the first direction and has a length of 97.5-102.5 mm (for example, 97.5, 98, 99.3, 100, 101, 101.4, 102.5, etc.), which is not specifically limited.

[0088] Optionally, the wired communication module is disposed in the accommodating cavity.

[0089] Different from the prior art, the electric meter provided by the present application electrically isolates the main control module at the strong-electric end from the communication module through an isolation module, which enables the communication module to be at the weak-electric end, meets safety regulations, and improves the safety of the electric meter; and the present application enables the communication module to meet safety regulations through the isolation module inside the electric meter, without the need to set up an additional insulation mechanism or isolation mechanism at the communication module end, thereby reducing the overall size of the electric meter; further, the present application can obtain electrical parameters from the power acquisition module and calculate the power information through the main control module, and at least send the power information through the communication module, so as to facilitate accurate acquisition of power information and communication with the external system, which is convenient for users to use. Therefore, the present application can improve the safety and convenience of the electric meter, and reduce its size.

[0090] Furthermore, the electric meter provided in the present application supports wireless and wired communications, improves its reliability, and can meet the needs of different users; and both wireless communication and wired communication are connected after isolation, meeting safety regulations and ensuring user safety.

[0091] Furthermore, the electric meter provided in the present application can support switching between long antennas and short antennas; the short antenna can be placed inside the box and its installation does not affect other devices, and the long antenna can be led to the outside of the box and can be flexibly replaced according to the usage environment.

[0092] It is worth noting that the drawings in this article are only intended to illustrate the structural relationship and connection relationship of the product of the present application, and do not limit the specific structural dimensions of the product of the present application.

[0093] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An electric meter, characterized in that: include: Strong power port; An electric quantity collection module is connected to the strong electric port and collects the electric signal received from the strong electric port to obtain electric parameters; A main control module, connected to the power acquisition module, wherein the main control module at least obtains the electrical parameters from the power acquisition module and calculates the power information; An isolation module, one end of which is connected to the main control module; A communication module connected to the other end of the isolation module; A power supply module, which supplies power to the power collection module, the main control module, the isolation module and the communication module respectively based on the electrical signal; The main control module at least sends the power information to the outside through the communication module, and the isolation module realizes electrical isolation between the main control module and the communication module.

2. The electric meter according to claim 1, characterized in that: The isolation module comprises: a first isolation module, one end of which is connected to the main control module; The communication module includes: a wireless communication module connected to the other end of the first isolation module; The main control module at least sends the power information to the outside through the wireless communication module, and the first isolation module realizes electrical isolation between the main control module and the wireless communication module.

3. The electric meter according to claim 2, characterized in that: The first isolation module includes: a magnetic isolation communication interface, which is connected to the main control module and the wireless communication module respectively.

4. The electric meter according to claim 1 or 2, characterized in that: The isolation module includes: a second isolation module, one end of which is connected to the main control module; The communication module includes: a wired communication module connected to the other end of the second isolation module; The main control module at least sends the power information to the outside through the wired communication module, and the second isolation module realizes electrical isolation between the main control module and the wired communication module.

5. The electric meter according to claim 4, characterized in that: The second isolation module comprises: The capacitive isolation communication interface is connected to the main control module and the wired communication module respectively.

6. The electric meter according to claim 1, characterized in that: The electric meter also includes: A power supply module is connected to the strong power port, the power acquisition module, the main control module, the isolation module and the communication module respectively, and supplies power to the power acquisition module, the main control module, the isolation module and the communication module respectively based on the electrical signal; Wherein, the electrical signal includes an alternating current signal, and the power supply module includes: A rectifier circuit, connected to the high-voltage port, and converting the AC signal into a DC signal; A first step-down circuit is connected to the rectifier circuit, the power acquisition module, the main control module, and the isolation module respectively, and supplies the DC power acquisition module, the main control module, and the isolation module after stepping down the DC power signal; A DC isolation circuit, connected to the rectifier circuit, for performing DCDC isolation on the DC signal; The second step-down circuit is connected to the DC isolation circuit, the communication module and the isolation module respectively, and steps down the DC signal after the DCDC isolation and supplies it to the communication module and the isolation module.

7. The electric meter according to claim 1, characterized in that: The power collection module includes: A voltage acquisition circuit is connected to the strong current port and acquires voltage information of the electrical signal; A current acquisition circuit is connected to the high-voltage port and acquires current information of the electrical signal; An electric quantity measurement circuit is connected to the voltage acquisition circuit, the current acquisition circuit and the main control module respectively; The power metering circuit transmits the voltage information and the current information to the main control module, and / or obtains power information based on the current information and the voltage information, and transmits the power information to the main control module.

8. The electric meter according to claim 2, characterized in that: The wireless communication module comprises: A communication circuit connected to the isolation module; An interface component connected to the communication circuit; An antenna, plugged into the interface assembly; Wherein, the interface component comprises: A shielded wire, one end of which is connected to the communication circuit; The adapter has a plug hole at one end, the antenna is plugged into the plug hole, and the other end of the adapter is connected to the other end of the shielded wire.

9. The electric meter according to claim 8, characterized in that: The adapter comprises: A transition portion extending along the first direction, with one end connected to the shielding wire and the other end provided with the plug hole; The mounting portion extends from one end of the adapter portion toward a second direction, and the second direction is perpendicular to the first direction.

10. The electric meter according to claim 8, characterized in that: The electric meter also includes a box body, the box body is formed with an installation cavity, the strong current port is arranged on the box body, and the power collection module, the main control module, the isolation module, the communication circuit, and the interface component are all arranged in the installation cavity; Wherein, when the antenna is an L-shaped short rod antenna, the L-shaped short rod antenna is also arranged in the installation cavity; Wherein, when the antenna is a long antenna, the electric meter also includes a suction cup; one end of the antenna is arranged in the installation cavity and connected to the interface component, and the other end of the antenna is arranged outside the box and installed on the outer wall of the box through the suction cup.

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