Slave and intelligent electric meter system

Abstract

The utility model provides a slave computer and an intelligent electric meter system, and belongs to the technical field of electrical equipment. The slave computer provided by the utility model comprises a shell and a circuit board. A containing cavity is formed in the shell and comprises a bottom wall and a top wall, and the bottom wall corresponds to the top wall. The circuit board is arranged in the containing cavity and comprises a main board and a metering board, the main board is parallel to the bottom wall, the metering board is arranged between the main board and the bottom wall, one side of the metering board makes contact with the bottom wall, or the metering board is arranged between the main board and the top wall, and one side of the metering board makes contact with the top wall. The main board is connected with the side, away from the bottom wall, of the metering board, and a non-zero included angle exists between the main board and the metering board. According to the application, the area of the alternating magnetic field penetrating through the metering plate can be reduced, so that the generated induced electromotive force is reduced, the error of electricity data acquired by the slave computer can be reduced, the use reliability of the slave computer can be improved, and the use reliability of the intelligent electric meter system can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical equipment, in particular to a slave and a smart meter system. BACKGROUND

[0002] The smart meter is one of the basic devices for data collection of the smart grid, and undertakes the task of raw electric energy data collection, metering and transmission, and is the basis for information integration, analysis and optimization and information display. The smart meter generally includes a master and a slave, and the master and the slave can form a smart meter system in cooperation. The master can actively initiate communication and control and manage the slave, and the slave can collect electric data such as voltage, current or power, and execute control instructions issued by the master.

[0003] In the prior art, the voltage and current sampling signals of the slave are distorted due to the influence of the current, and the error of the electric data collected by the slave is large, which reduces the use reliability of the smart meter system. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a slave and a smart meter system to improve the use reliability of the smart meter system.

[0005] In a first aspect, the present application provides a slave, which includes a shell and a circuit board. The shell is internally provided with an accommodating cavity, and the accommodating cavity includes a bottom wall and a top wall corresponding to each other. The circuit board is arranged in the accommodating cavity, and the circuit board includes a main board and a metering board. The main board is arranged in parallel with the bottom wall, and the metering board is arranged between the main board and the bottom wall, or the metering board is arranged between the main board and the top wall. The main board and the metering board are connected to each other on the side away from the bottom wall or the top wall, and there is a non-zero angle between the main board and the metering board.

[0006] Through the above scheme, when the alternating magnetic field passes through the metering board, an induced electromotive force is generated. Since the measurement accuracy of the metering board is sensitive, the generation of the induced electromotive force will distort the voltage or current sampling signal, which will cause the error of the electric data collected by the slave to be large. The direction of the alternating magnetic field is perpendicular to the main board, and when there is a non-zero angle between the metering board and the main board, the area of the alternating magnetic field passing through the metering board can be reduced. When the area of the alternating magnetic field passing through the metering board is reduced, the induced electromotive force generated is reduced, which can reduce the error of the electric data collected by the slave, thereby improving the use reliability of the slave. Since the slave and the master are connected to form a smart meter system, when the use reliability of the slave is improved, the use reliability of the smart meter system is also improved.

[0007] In a possible design, the angle between the main board and the metering board is 90°.

[0008] When the included angle between the main board and the metering board is 90°, the direction of the alternating magnetic field inside the slave machine is parallel to the setting direction of the metering board, so that the area through which the alternating magnetic field passes the metering board is minimum, and the alternating magnetic field can pass the metering board only in the length direction or the width direction of the metering board. When the area through which the alternating magnetic field passes the metering board is minimum, the induced electromotive force generated when the alternating magnetic field passes the metering board is minimum, so that the error of the metering board in measuring electric data can be reduced, and the use reliability of the intelligent electric meter system can be improved.

[0009] In a possible design, the main board and the metering board are connected by surface mounting.

[0010] Through the above scheme, not only the connection rate of the main board and the metering board can be improved, but also the connection stability between the main board and the metering board can be improved, the probability of separation between the main board and the metering board when the slave machine shakes or bumps can be reduced, and the use reliability of the circuit board is improved, so that the use reliability of the intelligent electric meter system can be improved.

[0011] Compared with the prior art, the surface mounting method can also directly connect the main board and the metering board, so that the use of pins and leads is saved, the impedance between the main board and the metering board can be reduced, and the parasitic inductance and parasitic capacitance generated between the main board and the metering board by current when using the traditional connection method can be reduced, so that the use reliability of the circuit board can be further improved, and the use reliability of the intelligent electric meter system can be improved.

[0012] In a possible design, the main board and the metering board are connected by through-hole welding.

[0013] Through the above scheme, compared with the traditional pin connection method, the through-hole welding can improve the connection stability between the main board and the metering board, can reduce the probability of separation between the main board and the metering board when the slave machine shakes or bumps, and can improve the use reliability of the circuit board, so that the use reliability of the intelligent electric meter system can be improved.

[0014] In a possible design, the main board is provided with a first positioning portion on the side close to the metering board. The metering board is provided with a second positioning portion on the side close to the main board. The first positioning portion and the second positioning portion are in position correspondence.

[0015] By the above scheme, since there is a non-zero angle between the main plate and the metering plate, when the first positioning part is arranged on the main plate, the second positioning part is arranged on the metering plate, and the first positioning part and the second positioning part are positionally corresponding, it can be proved that the relative position between the main plate and the metering plate is correct, and at this time, the main plate and the metering plate can be connected. In this way, the time for confirming the relative position of the main plate and the metering plate during installation can be saved, and thus the installation efficiency of the main plate and the metering plate can be improved.

[0016] Moreover, when the relative position between the main plate and the metering plate is correct, the probability of the problem that the circuit board fails during use due to the deviation of the relative position of the main plate and the metering plate can be reduced, and the use reliability of the circuit board can be improved, and thus the use reliability of the smart meter system can be improved.

[0017] In a possible design, the first positioning part and the second positioning part are both solder pads.

[0018] By the above scheme, when the main plate and the metering plate are welded, solder pads need to be arranged on the main plate and the metering plate, at this time, the solder pads not only facilitate the welding between the main plate and the metering plate, but also can play a positioning role for the main plate and the metering plate when the main plate and the metering plate are connected, that is, the solder pad arranged on the main plate can be the first positioning part, and the solder pad arranged on the metering plate can be the second positioning part, when the solder pad arranged on the main plate and the solder pad arranged on the metering plate are positionally corresponding, it can be indicated that the relative position of the main plate and the metering plate is accurate. In this way, the first positioning part and the second positioning part do not need to be additionally arranged on the main plate and the metering plate, and the manufacturing cost of the main plate and the metering plate is reduced, and thus the production cost of the smart meter system can be reduced.

[0019] In a possible design, the slave machine is further provided with a relay, and the relay is arranged in the accommodation cavity and fixedly connected with the shell.

[0020] By the above scheme, the relay is arranged in the slave machine, and the relay can be used to protect the slave machine from overload. The relay is arranged in the accommodation cavity, and the shell can be used to protect the relay, and thus the service life of the relay can be improved. When the relay is fixedly connected with the shell, the probability that the relay shakes in the accommodation cavity when the slave machine shakes or collides can be reduced. In this way, without affecting the use of the relay, the remaining elements in the shell can also be protected, the probability that the relay and the remaining elements in the shell collide and cause the slave machine to fail during use can be reduced, and thus the use reliability of the slave machine can be improved, and the use reliability of the smart meter system can be improved.

[0021] In a possible design, the relay is arranged between the main board and the bottom wall, and a positioning pin is arranged on the side of the relay facing the main board. The relay is welded to the main board through the positioning pin.

[0022] According to the above scheme, the relay is arranged between the main board and the bottom wall, so that the space between the main board and the bottom wall can be fully utilized, thereby saving the use of the internal space of the slave machine by the relay. Compared with the prior art, the relay is connected to the main board by using the positioning pin, thereby reducing the use of the lead wire. Since the manufacturing cost of the positioning pin is lower than that of the lead wire, the manufacturing cost of the slave machine can be reduced. In addition, the relay is connected to the main board by using the positioning pin, thereby reducing the impedance between the relay and the main board and improving the use reliability of the slave machine, and further improving the use reliability of the smart meter system.

[0023] In a second aspect, the application provides a smart meter system. The smart meter system comprises a master machine and the slave machine in the first aspect. The master machine is connected to the slave machine through the connector.

[0024] In a possible design, the slave machine is provided in plurality. The plurality of slave machines are connected to the master machine through the connector.

[0025] The smart meter system provided in the second aspect has the beneficial effects of the first aspect and the possible implementation manners of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The overall structure of the slave machine provided in the embodiment of the application is shown in the figure.

[0027] Figure 2 The partial structure of the slave machine provided in the embodiment of the application is shown in the figure.

[0028] Figure 3 The internal structure of the slave machine provided in the embodiment of the application is shown in the figure.

[0029] Figure 4 The structure of the circuit board provided in the embodiment of the application is shown in the figure.

[0030] Figure 5 The structure of the relay and the circuit board provided in the embodiment of the application is shown in the figure.

[0031] Figure 6 The structure of the circuit board provided in the embodiment of the application is shown in the figure.

[0032] Figure 7 The structure of the relay and the circuit board provided in the embodiment of the application is shown in the figure.

[0033] Reference numerals:

[0034] 100, housing; 110, top cover; 120, base; 121, bottom wall;

[0035] 200, circuit board; 210, main board; 220, metering board;

[0036] 300, relay; 310, positioning needle. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing the specific embodiments only and is not intended to be limiting of the application.

[0039] The terms "comprise", "have" and any variations thereof in the specification and claims of the present application and the terms "comprise", "have" and any variations thereof in the description of the drawings are intended to cover but not exclude other content. The word "one" or "a" does not exclude the presence of more than one.

[0040] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive or alternative embodiments. It is expressly understood that the embodiments described herein are merely examples from a whole class of comparable embodiments which those skilled in the art will readily appreciate. It is further expressly understood that the description herein and theoretically disclosed embodiments do not limit the claims thereof in any way.

[0041] The term "and / or" in the present application is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present application generally represents an "or" relationship between the associated objects before and after it.

[0042] The positional words appearing in the following description are the directions shown in the drawings, and are not intended to limit the specific structure of the present application. For example, in the description of the present application, the positional relationship or position indicated by the terms "center", "lengthwise", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the positional relationship or position shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0043] In addition, the terms "first", "second", and the like in the description and claims of the present application or the above drawings are used to distinguish different objects, and are not intended to describe a particular order, and can explicitly or implicitly include one or more of the features.

[0044] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, the "connection" or "connection" of mechanical structure can mean physical connection, for example, the physical connection can be fixed connection, for example, fixed connection by fixing member, for example, fixed connection by screw, bolt or other fixing member; the physical connection can also be detachable connection, for example, mutual clamping or clamping connection; the physical connection can also be integrally connected, for example, welding, bonding or integrally formed connection. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] In order for those skilled in the art to better understand the scheme of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings.

[0046] Figure 1 The overall structure of the slave provided in the embodiments of the present application is shown. As shown in Figure 1 The present application provides a smart meter system. The smart meter system includes a host and a slave. The host and the slave are connected through a connector.

[0047] The smart meter is one of the basic devices for data acquisition of smart grid, and undertakes the task of raw electric energy data acquisition, metering and transmission, and is the basis for realizing information integration, analysis and optimization and information display. The smart meter generally includes a host and a slave, and the host and the slave cooperate to form a smart meter system.

[0048] The slave generally includes a single-phase slave and a multi-phase slave. The single-phase slave is generally used in the household power or common commercial power scenarios. The multi-phase slave is generally used in the industrial power or high-power power scenarios.

[0049] The host and the slave can generally be connected by using a connector. The connector can include a pin and a socket. The pin can be arranged on the host, and the socket can be arranged on the slave, or the pin can be arranged on the slave, and the socket can be arranged on the host. When the pin is inserted into the socket, the connection between the host and the slave is completed.

[0050] In some use scenarios, for example, in a dormitory scenario, there can be multiple slaves. Each slave can collect the power consumption data of one dormitory. The data collected by the multiple slaves can be uploaded to the host. The multiple slaves can be arranged on a track. The multiple slaves can be connected by using the connector. Meanwhile, the multiple slaves can be connected to the host by using the connector.

[0051] In the prior art, the alternating magnetic field generated by the adjacent large current loop in the electromagnetic compatibility experiment can affect the internal elements of the slave. This can distort the voltage and current sampling signals of the slave, and can cause the error of the power consumption data collected by the slave to be large. In the scenario in which multiple slaves are used, when one slave is not used, if there is current passing through the adjacent slave, the alternating magnetic field generated by the current can affect the slave that is not used, so that the slave that is not used can also collect the power consumption data.

[0052] To solve the above problems, the present application provides a slave. In order for those skilled in the art to better understand the present application, the slave mentioned in the embodiments of the present application will be described clearly and completely in combination with the drawings.

[0053] Figure 2 Part of the structure of the slave provided in the embodiments of the present application is shown in the drawings. Figure 1 and Figure 2 As shown in the drawings, the present application provides a slave. The slave includes a housing 100. The housing 100 is internally provided with a receiving cavity. The receiving cavity includes a bottom wall 121 and a top wall. The bottom wall 121 corresponds to the top wall.

[0054] The housing 100 includes a top cover 110 and a base 120. The top cover 110 is internally provided with a mounting space. The base 120 is also internally provided with a mounting space. The top cover 110 and the base 120 can form a receiving cavity after being combined. The internal elements of the slave can be arranged in the receiving cavity. The bottom wall 121 can be an inner wall of the base 120 facing the top cover 110. The top wall can be an inner wall of the top cover 110 facing the base 120.

[0055] Figure 3 The internal structure of the slave provided in the embodiments of the present application is shown in the drawings.Figure 4 A structural schematic diagram of the circuit board provided by the embodiment of the present application is shown in one view. As shown in the figure, Figures 2 to 4 The slave machine further includes a circuit board 200, which is arranged in the accommodating cavity. The circuit board 200 includes a main board 210 and a metering board 220. The main board 210 is arranged in parallel with the bottom wall 121. The metering board 220 is arranged between the main board 210 and the bottom wall 121. The main board 210 and the metering board 220 are connected to each other at a side away from the bottom wall 121, and there is a non-zero included angle between the main board 210 and the metering board 220.

[0056] The bottom wall 121 can be provided with a positioning column in the direction of the top cover 110. The positioning column can be arranged vertically on the bottom wall 121. The main board 210 is provided with a positioning hole. When the main board 210 is installed in the accommodating cavity, the positioning column passes through the positioning hole and supports the main board 210, so that the main board 210 can be arranged in parallel with the bottom wall 121.

[0057] When the main board 210 is installed on the positioning column, there is a gap between the main board 210 and the bottom wall 121. The metering board 220 is arranged in the gap. When the metering board 220 is installed in the gap formed between the main board 210 and the bottom wall 121, one side of the metering board 220 is in contact with the bottom wall 121, and the other side of the metering board 220 is connected to the main board 210.

[0058] Since the metering board 220 is installed in the gap formed between the main board 210 and the bottom wall 121, and the side of the metering board 220 away from the bottom wall 121 is connected to the main board 210, a non-zero included angle is formed between the main board 210 and the metering board 220. The angle of the included angle can be greater than or equal to 1° and less than or equal to 90°.

[0059] In some possible embodiments, since the top cover 110 can also be provided with a mounting space, the metering board 220 can also be arranged at a side of the main board 210 facing the top cover 110. There can also be a non-zero included angle between the main board 210 and the metering board 220. Similarly, the angle of the included angle can also be greater than or equal to 1° and less than or equal to 90°.

[0060] Figure 5 A structural schematic diagram of the relay and the circuit board provided by the embodiment of the present application is shown in one view. As shown in the figure, Figure 5 The arrow direction can be the flow direction of the current. When the current flows through the inside of the slave machine, an alternating magnetic field is generated. According to the right-hand screw rule, the alternating magnetic field direction of the current is perpendicular to the main board 210.

[0061] The power module and the single-chip microcomputer control unit can be arranged on the main plate 210. The data acquisition module such as the metering unit can be arranged on the metering plate 220. When the current flows through the slave machine, the metering plate 220 can collect the data such as the current and the voltage, and can transmit the collected data to the main plate 210. In this way, the slave machine can upload the data collected by the metering plate 220 to the host machine.

[0062] As described above, the induced electromotive force is generated when the alternating magnetic field passes through the metering plate 220. Since the measurement accuracy of the metering plate 220 is sensitive, the generation of the induced electromotive force can distort the voltage or current sampling signal, which can cause the error of the power consumption data collected by the slave machine to be large. Since the direction of the alternating magnetic field is perpendicular to the main plate 210, when there is a non-zero angle between the metering plate 220 and the main plate 210, the area of the alternating magnetic field passing through the metering plate 220 can be reduced. When the area of the alternating magnetic field passing through the metering plate 220 is reduced, the induced electromotive force generated is reduced, which can reduce the error of the power consumption data collected by the slave machine, thereby improving the use reliability of the slave machine. Since the slave machine and the host machine are connected to form an intelligent electric meter system, when the use reliability of the slave machine is improved, the use reliability of the intelligent electric meter system is also improved.

[0063] Figure 6 The structure of the circuit board provided by the embodiment of the present application is shown in another view. Further, as shown in Figure 2 and Figure 6 The angle between the main plate 210 and the metering plate 220 can be 90°.

[0064] The metering plate 220 can be arranged between the main plate 210 and the bottom wall 121. Since the main plate 210 and the bottom wall 121 are arranged in parallel, when the angle between the main plate 210 and the metering plate 220 is 90°, one side of the metering plate 220 is perpendicular to the main plate 210, and the other side of the metering plate 220 is perpendicular to the bottom wall 121.

[0065] As described above, the direction of the alternating magnetic field generated when the current flows through the slave machine is perpendicular to the main plate 210. When the angle between the main plate 210 and the metering plate 220 is 90°, the direction of the alternating magnetic field is parallel to the metering plate 220.

[0066] In summary, when the included angle between the main plate 210 and the metering plate 220 is 90°, the direction of the alternating magnetic field from the inside of the machine is parallel to the setting direction of the metering plate 220, so that the area through which the alternating magnetic field passes through the metering plate 220 is the smallest, and the alternating magnetic field can only pass through the metering plate 220 along the length direction or the width direction of the metering plate 220. When the area through which the alternating magnetic field passes through the metering plate 220 is the smallest, the induced electromotive force generated when the alternating magnetic field passes through the metering plate 220 is the smallest, so that the error when the metering plate 220 measures the electric data can be reduced, and the use reliability of the intelligent electric meter system can be improved.

[0067] Since there is a non-zero included angle between the main plate 210 and the metering plate 220, in order to facilitate the installation between the main plate 210 and the metering plate 220 and improve the installation efficiency between the main plate 210 and the metering plate 220, the present application is further improved as follows.

[0068] As shown in Figure 4 and Figure 6 , the side of the main plate 210 close to the metering plate 220 is provided with a first positioning part. The side of the metering plate 220 close to the main plate 210 is provided with a second positioning part. The first positioning part and the second positioning part are positionally corresponding.

[0069] The side of the main plate 210 close to the metering plate 220 is provided with a groove, which can be the first positioning part. The side of the metering plate 220 close to the main plate 210 is provided with a protrusion, which can be the second positioning part. Alternatively, the side of the main plate 210 close to the metering plate 220 is provided with a protrusion, which can be the first positioning part, and the side of the metering plate 220 close to the main plate 210 is provided with a groove, which can be the second positioning part. Alternatively, the side of the main plate 210 close to the metering plate 220 is provided with a first mark, which can be the first positioning part, and the side of the main plate 210 close to the metering plate 220 is provided with a second mark, which can be the second positioning part. The first mark and the second mark can be marked with different colors to facilitate the distinction between the main plate 210 and the metering plate 220.

[0070] When the main plate 210 and the metering plate 220 are installed, the first positioning part can be positionally corresponding to the second positioning part. For example, the protrusion can be located in the groove, or the first mark can be aligned with the second mark.

[0071] By the above arrangement, since there is a non-zero included angle between the main board 210 and the metering board 220, when the first positioning part is arranged on the main board 210, the second positioning part is arranged on the metering board 220, and the first positioning part and the second positioning part are positionally corresponding, it can be proved that the relative position between the main board 210 and the metering board 220 is correct, and at this time, the main board 210 and the metering board 220 can be connected. In this way, the time for confirming the relative position of the main board 210 and the metering board 220 during installation can be saved, and thus the installation efficiency of the main board 210 and the metering board 220 can be improved.

[0072] Moreover, when the relative position between the main board 210 and the metering board 220 is correct, the probability of the problem that the circuit board 200 malfunctions during use due to the deviation of the relative position between the main board 210 and the metering board 220 can be reduced, and the use reliability of the circuit board 200 can be improved, and thus the use reliability of the smart meter system can be improved.

[0073] In the prior art, the main board 210 and the metering board 220 are usually connected by using a pin or a lead, and these connection modes not only increase the impedance between the main board 210 and the metering board 220, but also are prone to disconnection between the main board 210 and the metering board 220 when the slave machine moves or is bumped. In order to solve the above problems, the connection mode between the main board 210 and the metering board 220 is improved in the present application, and two connection modes are exemplarily described below.

[0074] The first connection mode is described with reference to Figure 4 and Figure 6 It is shown that the main board 210 and the metering board 220 can be connected by surface mounting.

[0075] Surface mounting technology is one of the core processes in the field of electronic manufacturing, and is mainly used for directly mounting micro electronic components such as chips, resistors, capacitors, etc. on the surface of a printed circuit board, and then welding and connecting by reflow soldering technology.

[0076] When the first connection mode is selected, the technology of mounting micro electronic components on the surface of a circuit board is used in the connection process of the main board 210 and the metering board 220, which not only can improve the connection rate of the main board 210 and the metering board 220, but also can improve the connection stability between the main board 210 and the metering board 220, and can reduce the probability of the problem that the main board 210 and the metering board 220 are separated when the slave machine shakes or is bumped, and thus the use reliability of the circuit board 200 can be improved, and the use reliability of the smart meter system can be improved.

[0077] Compared with the prior art, the surface mounting method can also directly connect the main board 210 and the metering board 220, thereby eliminating the use of pins and leads, reducing the impedance between the main board 210 and the metering board 220, and reducing the parasitic inductance and parasitic capacitance generated between the main board 210 and the metering board 220 when connected by the traditional technology, thereby further improving the use reliability of the circuit board 200, and achieving the purpose of improving the use reliability of the smart meter system.

[0078] The second connection method is described below with reference to Figure 4 and Figure 6 The main board 210 and the metering board 220 can be connected by through-hole welding.

[0079] Through-hole welding is a traditional electronic component welding technology, mainly used to mount electronic components such as resistors, capacitors, connectors, etc. to printed circuit boards.

[0080] The core step of through-hole welding is to pre-drill holes on the main board 210 to form through holes, and to provide pins on the metering board 220. After inserting the pins of the metering board 220 into the through holes of the main board 210, electrical connection and mechanical fixation are achieved by welding process.

[0081] Compared with the traditional pin connection method, the through-hole welding method can improve the connection stability between the main board 210 and the metering board 220, reduce the probability of separation between the main board 210 and the metering board 220 when the slave machine shakes or bumps, and improve the use reliability of the circuit board 200, thereby improving the use reliability of the smart meter system.

[0082] Regardless of the first connection method or the second connection method, the main board 210 and the metering board 220 need to be welded. When the main board 210 and the metering board 220 are welded, pads need to be provided on the main board 210 and the metering board 220. At this time, the pads not only facilitate welding between the main board 210 and the metering board 220, but also serve as positioning for the main board 210 and the metering board 220 when they are connected. That is, the pads provided on the main board 210 can be the first positioning part, and the pads provided on the metering board 220 can be the second positioning part. When the pads provided on the main board 210 and the pads provided on the metering board 220 are in position correspondence, it indicates that the relative position of the main board 210 and the metering board 220 is accurate. In this way, the first positioning part and the second positioning part do not need to be additionally provided on the main board 210 and the metering board 220, reducing the manufacturing cost of the main board 210 and the metering board 220, and thereby reducing the production cost of the smart meter system.

[0083] Figure 7 The structure of the relay and the circuit board in another perspective view is provided for the embodiment of the present application. As shown in Figure 1 、 Figure 5 and Figure 7 mentioned in the present application, the slave device is also provided with a relay 300, which is arranged in the accommodating cavity, and the relay 300 is fixedly connected with the shell 100.

[0084] The arrangement of the relay 300 can provide overload protection for the slave device. When the current flowing through the slave device exceeds the rated value, the relay 300 will quickly cut off the power supply to prevent the slave device from being damaged or causing a fire due to overload.

[0085] The arrangement of the relay 300 can also facilitate remote control of the on-off of the slave device by the power supply department. In fault repair, power failure or temporary power dispatch, the power supply department can remotely send instructions to control the on-off of the relay 300 through the communication network. Manual on-site operation is not required.

[0086] In summary, the arrangement of the relay 300 in the slave device can utilize the relay 300 to provide overload protection for the slave device. The relay 300 is arranged in the accommodating cavity, and the shell 100 can be used to protect the relay 300, which can improve the service life of the relay 300. When the relay 300 is fixedly connected with the shell 100, the probability of the relay 300 moving together with the accommodating cavity when the slave device is shaken or bumped can be reduced. In this way, without affecting the use of the relay 300, the remaining elements inside the shell 100 can also be protected, reducing the probability of collision between the relay 300 and the remaining elements inside the shell 100, which can cause the slave device to malfunction during use, thereby improving the use reliability of the slave device and further improving the use reliability of the smart meter system.

[0087] As shown in Figure 2 、 Figure 3 and Figure 5 , the relay 300 is arranged between the main board 210 and the bottom wall 121, and the side of the relay 300 facing the main board 210 is provided with a positioning pin 310. The relay 300 is welded to the main board 210 through the positioning pin 310.

[0088] The bottom wall 121 is provided with a positioning column, which supports and positions the main board 210, so that the main board 210 can be arranged parallel to the bottom wall 121. Due to the presence of the positioning column, there is a gap between the main board 210 and the bottom wall 121. In order to save the use of internal space of the slave device, the relay 300 can be arranged in the gap.

[0089] The relay 300 is provided with a positioning pin 310 on the side facing the main board 210, and the main board 210 can be provided with a through hole at the position corresponding to the positioning pin 310. When the positioning pin 310 is inserted into the through hole, the relay 300 and the main board 210 can be connected by through hole welding.

[0090] Since the relay 300 is fixedly connected to the shell 100, when the positioning pin 310 is through hole welded with the main board 210, the main board 210 can be supported by the relay 300, thereby improving the installation stability of the main board 210.

[0091] In summary, the relay 300 is arranged between the main board 210 and the bottom wall 121, so that the space between the main board 210 and the bottom wall 121 can be fully utilized, thereby saving the use of the internal space of the slave machine. Compared with the prior art, the relay 300 and the main board 210 are connected by the positioning pin 310, which can reduce the use of lead wires. Since the manufacturing cost of the positioning pin 310 is lower than that of the lead wire, the manufacturing cost of the slave machine can be reduced. Moreover, the relay 300 and the main board 210 are connected by the positioning pin 310, which can also reduce the impedance between the relay 300 and the main board 210, thereby improving the use reliability of the slave machine and the use reliability of the smart meter system.

Claims

1. A slave device, characterized in that, include: The housing has an internal cavity, which includes a bottom wall and a top wall, with the bottom wall and the top wall corresponding to each other. A circuit board is disposed within the receiving cavity. The circuit board includes a main board and a metering board. The main board is disposed parallel to the bottom wall, and the metering board is disposed between the main board and the bottom wall. Alternatively, the metering board is disposed between the main board and the top wall. The main board and the metering plate are connected to each other on the side away from the bottom wall or the top wall, and there is a non-zero included angle between the main board and the metering plate.

2. The slave device according to claim 1, characterized in that, The included angle between the motherboard and the metering board is 90°.

3. The slave device according to claim 1, characterized in that, The motherboard and the metering board are connected by surface mounting.

4. The slave device according to claim 1, characterized in that, The motherboard and the metering board are connected by through-hole welding.

5. The slave device according to claim 3 or 4, characterized in that, The motherboard has a first positioning part on the side near the metering plate; The metering plate is provided with a second positioning part on the side near the main board; The first positioning part and the second positioning part are positioned correspondingly.

6. The slave device according to claim 5, characterized in that, Both the first positioning part and the second positioning part are solder pads.

7. The slave device according to claim 1, characterized in that, A relay is also provided, which is disposed within the receiving cavity and is fixedly connected to the housing.

8. The slave device according to claim 7, characterized in that, The relay is disposed between the motherboard and the bottom wall, and a positioning pin is provided on the side of the relay facing the motherboard; The relay is soldered to the motherboard via the positioning pin.

9. A smart meter system, characterized in that, Includes a host and a slave device as described in any one of claims 1 to 8; The host and the slave are connected via a connector.

10. The smart meter system according to claim 9, characterized in that, There are multiple slave devices; each of the multiple slave devices is connected to the master device via a connector.

Images